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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /tools/include/nolibc
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tools/include/nolibc')
-rw-r--r--tools/include/nolibc/Makefile75
-rw-r--r--tools/include/nolibc/arch-aarch64.h199
-rw-r--r--tools/include/nolibc/arch-arm.h204
-rw-r--r--tools/include/nolibc/arch-i386.h219
-rw-r--r--tools/include/nolibc/arch-mips.h217
-rw-r--r--tools/include/nolibc/arch-riscv.h204
-rw-r--r--tools/include/nolibc/arch-x86_64.h215
-rw-r--r--tools/include/nolibc/arch.h32
-rw-r--r--tools/include/nolibc/ctype.h102
-rw-r--r--tools/include/nolibc/errno.h30
-rw-r--r--tools/include/nolibc/nolibc.h111
-rw-r--r--tools/include/nolibc/signal.h25
-rw-r--r--tools/include/nolibc/std.h49
-rw-r--r--tools/include/nolibc/stdio.h309
-rw-r--r--tools/include/nolibc/stdlib.h425
-rw-r--r--tools/include/nolibc/string.h294
-rw-r--r--tools/include/nolibc/sys.h1249
-rw-r--r--tools/include/nolibc/time.h31
-rw-r--r--tools/include/nolibc/types.h215
-rw-r--r--tools/include/nolibc/unistd.h57
20 files changed, 4262 insertions, 0 deletions
diff --git a/tools/include/nolibc/Makefile b/tools/include/nolibc/Makefile
new file mode 100644
index 000000000..cfd06764b
--- /dev/null
+++ b/tools/include/nolibc/Makefile
@@ -0,0 +1,75 @@
+# SPDX-License-Identifier: GPL-2.0
+# Makefile for nolibc installation and tests
+include ../../scripts/Makefile.include
+
+# we're in ".../tools/include/nolibc"
+ifeq ($(srctree),)
+srctree := $(patsubst %/tools/include/,%,$(dir $(CURDIR)))
+endif
+
+# when run as make -C tools/ nolibc_<foo> the arch is not set
+ifeq ($(ARCH),)
+include $(srctree)/scripts/subarch.include
+ARCH = $(SUBARCH)
+endif
+
+# OUTPUT is only set when run from the main makefile, otherwise
+# it defaults to this nolibc directory.
+OUTPUT ?= $(CURDIR)/
+
+ifeq ($(V),1)
+Q=
+else
+Q=@
+endif
+
+nolibc_arch := $(patsubst arm64,aarch64,$(ARCH))
+arch_file := arch-$(nolibc_arch).h
+all_files := ctype.h errno.h nolibc.h signal.h std.h stdio.h stdlib.h string.h \
+ sys.h time.h types.h unistd.h
+
+# install all headers needed to support a bare-metal compiler
+all: headers
+
+install: help
+
+help:
+ @echo "Supported targets under nolibc:"
+ @echo " all call \"headers\""
+ @echo " clean clean the sysroot"
+ @echo " headers prepare a sysroot in tools/include/nolibc/sysroot"
+ @echo " headers_standalone like \"headers\", and also install kernel headers"
+ @echo " help this help"
+ @echo ""
+ @echo "These targets may also be called from tools as \"make nolibc_<target>\"."
+ @echo ""
+ @echo "Currently using the following variables:"
+ @echo " ARCH = $(ARCH)"
+ @echo " OUTPUT = $(OUTPUT)"
+ @echo ""
+
+# Note: when ARCH is "x86" we concatenate both x86_64 and i386
+headers:
+ $(Q)mkdir -p $(OUTPUT)sysroot
+ $(Q)mkdir -p $(OUTPUT)sysroot/include
+ $(Q)cp $(all_files) $(OUTPUT)sysroot/include/
+ $(Q)if [ "$(ARCH)" = "x86" ]; then \
+ sed -e \
+ 's,^#ifndef _NOLIBC_ARCH_X86_64_H,#if !defined(_NOLIBC_ARCH_X86_64_H) \&\& defined(__x86_64__),' \
+ arch-x86_64.h; \
+ sed -e \
+ 's,^#ifndef _NOLIBC_ARCH_I386_H,#if !defined(_NOLIBC_ARCH_I386_H) \&\& !defined(__x86_64__),' \
+ arch-i386.h; \
+ elif [ -e "$(arch_file)" ]; then \
+ cat $(arch_file); \
+ else \
+ echo "Fatal: architecture $(ARCH) not yet supported by nolibc." >&2; \
+ exit 1; \
+ fi > $(OUTPUT)sysroot/include/arch.h
+
+headers_standalone: headers
+ $(Q)$(MAKE) -C $(srctree) headers
+ $(Q)$(MAKE) -C $(srctree) headers_install INSTALL_HDR_PATH=$(OUTPUT)sysroot
+
+clean:
+ $(call QUIET_CLEAN, nolibc) rm -rf "$(OUTPUT)sysroot"
diff --git a/tools/include/nolibc/arch-aarch64.h b/tools/include/nolibc/arch-aarch64.h
new file mode 100644
index 000000000..f68baf8f3
--- /dev/null
+++ b/tools/include/nolibc/arch-aarch64.h
@@ -0,0 +1,199 @@
+/* SPDX-License-Identifier: LGPL-2.1 OR MIT */
+/*
+ * AARCH64 specific definitions for NOLIBC
+ * Copyright (C) 2017-2022 Willy Tarreau <w@1wt.eu>
+ */
+
+#ifndef _NOLIBC_ARCH_AARCH64_H
+#define _NOLIBC_ARCH_AARCH64_H
+
+/* O_* macros for fcntl/open are architecture-specific */
+#define O_RDONLY 0
+#define O_WRONLY 1
+#define O_RDWR 2
+#define O_CREAT 0x40
+#define O_EXCL 0x80
+#define O_NOCTTY 0x100
+#define O_TRUNC 0x200
+#define O_APPEND 0x400
+#define O_NONBLOCK 0x800
+#define O_DIRECTORY 0x4000
+
+/* The struct returned by the newfstatat() syscall. Differs slightly from the
+ * x86_64's stat one by field ordering, so be careful.
+ */
+struct sys_stat_struct {
+ unsigned long st_dev;
+ unsigned long st_ino;
+ unsigned int st_mode;
+ unsigned int st_nlink;
+ unsigned int st_uid;
+ unsigned int st_gid;
+
+ unsigned long st_rdev;
+ unsigned long __pad1;
+ long st_size;
+ int st_blksize;
+ int __pad2;
+
+ long st_blocks;
+ long st_atime;
+ unsigned long st_atime_nsec;
+ long st_mtime;
+
+ unsigned long st_mtime_nsec;
+ long st_ctime;
+ unsigned long st_ctime_nsec;
+ unsigned int __unused[2];
+};
+
+/* Syscalls for AARCH64 :
+ * - registers are 64-bit
+ * - stack is 16-byte aligned
+ * - syscall number is passed in x8
+ * - arguments are in x0, x1, x2, x3, x4, x5
+ * - the system call is performed by calling svc 0
+ * - syscall return comes in x0.
+ * - the arguments are cast to long and assigned into the target registers
+ * which are then simply passed as registers to the asm code, so that we
+ * don't have to experience issues with register constraints.
+ *
+ * On aarch64, select() is not implemented so we have to use pselect6().
+ */
+#define __ARCH_WANT_SYS_PSELECT6
+
+#define my_syscall0(num) \
+({ \
+ register long _num __asm__ ("x8") = (num); \
+ register long _arg1 __asm__ ("x0"); \
+ \
+ __asm__ volatile ( \
+ "svc #0\n" \
+ : "=r"(_arg1) \
+ : "r"(_num) \
+ : "memory", "cc" \
+ ); \
+ _arg1; \
+})
+
+#define my_syscall1(num, arg1) \
+({ \
+ register long _num __asm__ ("x8") = (num); \
+ register long _arg1 __asm__ ("x0") = (long)(arg1); \
+ \
+ __asm__ volatile ( \
+ "svc #0\n" \
+ : "=r"(_arg1) \
+ : "r"(_arg1), \
+ "r"(_num) \
+ : "memory", "cc" \
+ ); \
+ _arg1; \
+})
+
+#define my_syscall2(num, arg1, arg2) \
+({ \
+ register long _num __asm__ ("x8") = (num); \
+ register long _arg1 __asm__ ("x0") = (long)(arg1); \
+ register long _arg2 __asm__ ("x1") = (long)(arg2); \
+ \
+ __asm__ volatile ( \
+ "svc #0\n" \
+ : "=r"(_arg1) \
+ : "r"(_arg1), "r"(_arg2), \
+ "r"(_num) \
+ : "memory", "cc" \
+ ); \
+ _arg1; \
+})
+
+#define my_syscall3(num, arg1, arg2, arg3) \
+({ \
+ register long _num __asm__ ("x8") = (num); \
+ register long _arg1 __asm__ ("x0") = (long)(arg1); \
+ register long _arg2 __asm__ ("x1") = (long)(arg2); \
+ register long _arg3 __asm__ ("x2") = (long)(arg3); \
+ \
+ __asm__ volatile ( \
+ "svc #0\n" \
+ : "=r"(_arg1) \
+ : "r"(_arg1), "r"(_arg2), "r"(_arg3), \
+ "r"(_num) \
+ : "memory", "cc" \
+ ); \
+ _arg1; \
+})
+
+#define my_syscall4(num, arg1, arg2, arg3, arg4) \
+({ \
+ register long _num __asm__ ("x8") = (num); \
+ register long _arg1 __asm__ ("x0") = (long)(arg1); \
+ register long _arg2 __asm__ ("x1") = (long)(arg2); \
+ register long _arg3 __asm__ ("x2") = (long)(arg3); \
+ register long _arg4 __asm__ ("x3") = (long)(arg4); \
+ \
+ __asm__ volatile ( \
+ "svc #0\n" \
+ : "=r"(_arg1) \
+ : "r"(_arg1), "r"(_arg2), "r"(_arg3), "r"(_arg4), \
+ "r"(_num) \
+ : "memory", "cc" \
+ ); \
+ _arg1; \
+})
+
+#define my_syscall5(num, arg1, arg2, arg3, arg4, arg5) \
+({ \
+ register long _num __asm__ ("x8") = (num); \
+ register long _arg1 __asm__ ("x0") = (long)(arg1); \
+ register long _arg2 __asm__ ("x1") = (long)(arg2); \
+ register long _arg3 __asm__ ("x2") = (long)(arg3); \
+ register long _arg4 __asm__ ("x3") = (long)(arg4); \
+ register long _arg5 __asm__ ("x4") = (long)(arg5); \
+ \
+ __asm__ volatile ( \
+ "svc #0\n" \
+ : "=r" (_arg1) \
+ : "r"(_arg1), "r"(_arg2), "r"(_arg3), "r"(_arg4), "r"(_arg5), \
+ "r"(_num) \
+ : "memory", "cc" \
+ ); \
+ _arg1; \
+})
+
+#define my_syscall6(num, arg1, arg2, arg3, arg4, arg5, arg6) \
+({ \
+ register long _num __asm__ ("x8") = (num); \
+ register long _arg1 __asm__ ("x0") = (long)(arg1); \
+ register long _arg2 __asm__ ("x1") = (long)(arg2); \
+ register long _arg3 __asm__ ("x2") = (long)(arg3); \
+ register long _arg4 __asm__ ("x3") = (long)(arg4); \
+ register long _arg5 __asm__ ("x4") = (long)(arg5); \
+ register long _arg6 __asm__ ("x5") = (long)(arg6); \
+ \
+ __asm__ volatile ( \
+ "svc #0\n" \
+ : "=r" (_arg1) \
+ : "r"(_arg1), "r"(_arg2), "r"(_arg3), "r"(_arg4), "r"(_arg5), \
+ "r"(_arg6), "r"(_num) \
+ : "memory", "cc" \
+ ); \
+ _arg1; \
+})
+
+/* startup code */
+__asm__ (".section .text\n"
+ ".weak _start\n"
+ "_start:\n"
+ "ldr x0, [sp]\n" // argc (x0) was in the stack
+ "add x1, sp, 8\n" // argv (x1) = sp
+ "lsl x2, x0, 3\n" // envp (x2) = 8*argc ...
+ "add x2, x2, 8\n" // + 8 (skip null)
+ "add x2, x2, x1\n" // + argv
+ "and sp, x1, -16\n" // sp must be 16-byte aligned in the callee
+ "bl main\n" // main() returns the status code, we'll exit with it.
+ "mov x8, 93\n" // NR_exit == 93
+ "svc #0\n"
+ "");
+
+#endif // _NOLIBC_ARCH_AARCH64_H
diff --git a/tools/include/nolibc/arch-arm.h b/tools/include/nolibc/arch-arm.h
new file mode 100644
index 000000000..f31be8e96
--- /dev/null
+++ b/tools/include/nolibc/arch-arm.h
@@ -0,0 +1,204 @@
+/* SPDX-License-Identifier: LGPL-2.1 OR MIT */
+/*
+ * ARM specific definitions for NOLIBC
+ * Copyright (C) 2017-2022 Willy Tarreau <w@1wt.eu>
+ */
+
+#ifndef _NOLIBC_ARCH_ARM_H
+#define _NOLIBC_ARCH_ARM_H
+
+/* O_* macros for fcntl/open are architecture-specific */
+#define O_RDONLY 0
+#define O_WRONLY 1
+#define O_RDWR 2
+#define O_CREAT 0x40
+#define O_EXCL 0x80
+#define O_NOCTTY 0x100
+#define O_TRUNC 0x200
+#define O_APPEND 0x400
+#define O_NONBLOCK 0x800
+#define O_DIRECTORY 0x4000
+
+/* The struct returned by the stat() syscall, 32-bit only, the syscall returns
+ * exactly 56 bytes (stops before the unused array). In big endian, the format
+ * differs as devices are returned as short only.
+ */
+struct sys_stat_struct {
+#if defined(__ARMEB__)
+ unsigned short st_dev;
+ unsigned short __pad1;
+#else
+ unsigned long st_dev;
+#endif
+ unsigned long st_ino;
+ unsigned short st_mode;
+ unsigned short st_nlink;
+ unsigned short st_uid;
+ unsigned short st_gid;
+
+#if defined(__ARMEB__)
+ unsigned short st_rdev;
+ unsigned short __pad2;
+#else
+ unsigned long st_rdev;
+#endif
+ unsigned long st_size;
+ unsigned long st_blksize;
+ unsigned long st_blocks;
+
+ unsigned long st_atime;
+ unsigned long st_atime_nsec;
+ unsigned long st_mtime;
+ unsigned long st_mtime_nsec;
+
+ unsigned long st_ctime;
+ unsigned long st_ctime_nsec;
+ unsigned long __unused[2];
+};
+
+/* Syscalls for ARM in ARM or Thumb modes :
+ * - registers are 32-bit
+ * - stack is 8-byte aligned
+ * ( http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.faqs/ka4127.html)
+ * - syscall number is passed in r7
+ * - arguments are in r0, r1, r2, r3, r4, r5
+ * - the system call is performed by calling svc #0
+ * - syscall return comes in r0.
+ * - only lr is clobbered.
+ * - the arguments are cast to long and assigned into the target registers
+ * which are then simply passed as registers to the asm code, so that we
+ * don't have to experience issues with register constraints.
+ * - the syscall number is always specified last in order to allow to force
+ * some registers before (gcc refuses a %-register at the last position).
+ *
+ * Also, ARM supports the old_select syscall if newselect is not available
+ */
+#define __ARCH_WANT_SYS_OLD_SELECT
+
+#define my_syscall0(num) \
+({ \
+ register long _num __asm__ ("r7") = (num); \
+ register long _arg1 __asm__ ("r0"); \
+ \
+ __asm__ volatile ( \
+ "svc #0\n" \
+ : "=r"(_arg1) \
+ : "r"(_num) \
+ : "memory", "cc", "lr" \
+ ); \
+ _arg1; \
+})
+
+#define my_syscall1(num, arg1) \
+({ \
+ register long _num __asm__ ("r7") = (num); \
+ register long _arg1 __asm__ ("r0") = (long)(arg1); \
+ \
+ __asm__ volatile ( \
+ "svc #0\n" \
+ : "=r"(_arg1) \
+ : "r"(_arg1), \
+ "r"(_num) \
+ : "memory", "cc", "lr" \
+ ); \
+ _arg1; \
+})
+
+#define my_syscall2(num, arg1, arg2) \
+({ \
+ register long _num __asm__ ("r7") = (num); \
+ register long _arg1 __asm__ ("r0") = (long)(arg1); \
+ register long _arg2 __asm__ ("r1") = (long)(arg2); \
+ \
+ __asm__ volatile ( \
+ "svc #0\n" \
+ : "=r"(_arg1) \
+ : "r"(_arg1), "r"(_arg2), \
+ "r"(_num) \
+ : "memory", "cc", "lr" \
+ ); \
+ _arg1; \
+})
+
+#define my_syscall3(num, arg1, arg2, arg3) \
+({ \
+ register long _num __asm__ ("r7") = (num); \
+ register long _arg1 __asm__ ("r0") = (long)(arg1); \
+ register long _arg2 __asm__ ("r1") = (long)(arg2); \
+ register long _arg3 __asm__ ("r2") = (long)(arg3); \
+ \
+ __asm__ volatile ( \
+ "svc #0\n" \
+ : "=r"(_arg1) \
+ : "r"(_arg1), "r"(_arg2), "r"(_arg3), \
+ "r"(_num) \
+ : "memory", "cc", "lr" \
+ ); \
+ _arg1; \
+})
+
+#define my_syscall4(num, arg1, arg2, arg3, arg4) \
+({ \
+ register long _num __asm__ ("r7") = (num); \
+ register long _arg1 __asm__ ("r0") = (long)(arg1); \
+ register long _arg2 __asm__ ("r1") = (long)(arg2); \
+ register long _arg3 __asm__ ("r2") = (long)(arg3); \
+ register long _arg4 __asm__ ("r3") = (long)(arg4); \
+ \
+ __asm__ volatile ( \
+ "svc #0\n" \
+ : "=r"(_arg1) \
+ : "r"(_arg1), "r"(_arg2), "r"(_arg3), "r"(_arg4), \
+ "r"(_num) \
+ : "memory", "cc", "lr" \
+ ); \
+ _arg1; \
+})
+
+#define my_syscall5(num, arg1, arg2, arg3, arg4, arg5) \
+({ \
+ register long _num __asm__ ("r7") = (num); \
+ register long _arg1 __asm__ ("r0") = (long)(arg1); \
+ register long _arg2 __asm__ ("r1") = (long)(arg2); \
+ register long _arg3 __asm__ ("r2") = (long)(arg3); \
+ register long _arg4 __asm__ ("r3") = (long)(arg4); \
+ register long _arg5 __asm__ ("r4") = (long)(arg5); \
+ \
+ __asm__ volatile ( \
+ "svc #0\n" \
+ : "=r" (_arg1) \
+ : "r"(_arg1), "r"(_arg2), "r"(_arg3), "r"(_arg4), "r"(_arg5), \
+ "r"(_num) \
+ : "memory", "cc", "lr" \
+ ); \
+ _arg1; \
+})
+
+/* startup code */
+__asm__ (".section .text\n"
+ ".weak _start\n"
+ "_start:\n"
+#if defined(__THUMBEB__) || defined(__THUMBEL__)
+ /* We enter here in 32-bit mode but if some previous functions were in
+ * 16-bit mode, the assembler cannot know, so we need to tell it we're in
+ * 32-bit now, then switch to 16-bit (is there a better way to do it than
+ * adding 1 by hand ?) and tell the asm we're now in 16-bit mode so that
+ * it generates correct instructions. Note that we do not support thumb1.
+ */
+ ".code 32\n"
+ "add r0, pc, #1\n"
+ "bx r0\n"
+ ".code 16\n"
+#endif
+ "pop {%r0}\n" // argc was in the stack
+ "mov %r1, %sp\n" // argv = sp
+ "add %r2, %r1, %r0, lsl #2\n" // envp = argv + 4*argc ...
+ "add %r2, %r2, $4\n" // ... + 4
+ "and %r3, %r1, $-8\n" // AAPCS : sp must be 8-byte aligned in the
+ "mov %sp, %r3\n" // callee, an bl doesn't push (lr=pc)
+ "bl main\n" // main() returns the status code, we'll exit with it.
+ "movs r7, $1\n" // NR_exit == 1
+ "svc $0x00\n"
+ "");
+
+#endif // _NOLIBC_ARCH_ARM_H
diff --git a/tools/include/nolibc/arch-i386.h b/tools/include/nolibc/arch-i386.h
new file mode 100644
index 000000000..d7e721234
--- /dev/null
+++ b/tools/include/nolibc/arch-i386.h
@@ -0,0 +1,219 @@
+/* SPDX-License-Identifier: LGPL-2.1 OR MIT */
+/*
+ * i386 specific definitions for NOLIBC
+ * Copyright (C) 2017-2022 Willy Tarreau <w@1wt.eu>
+ */
+
+#ifndef _NOLIBC_ARCH_I386_H
+#define _NOLIBC_ARCH_I386_H
+
+/* O_* macros for fcntl/open are architecture-specific */
+#define O_RDONLY 0
+#define O_WRONLY 1
+#define O_RDWR 2
+#define O_CREAT 0x40
+#define O_EXCL 0x80
+#define O_NOCTTY 0x100
+#define O_TRUNC 0x200
+#define O_APPEND 0x400
+#define O_NONBLOCK 0x800
+#define O_DIRECTORY 0x10000
+
+/* The struct returned by the stat() syscall, 32-bit only, the syscall returns
+ * exactly 56 bytes (stops before the unused array).
+ */
+struct sys_stat_struct {
+ unsigned long st_dev;
+ unsigned long st_ino;
+ unsigned short st_mode;
+ unsigned short st_nlink;
+ unsigned short st_uid;
+ unsigned short st_gid;
+
+ unsigned long st_rdev;
+ unsigned long st_size;
+ unsigned long st_blksize;
+ unsigned long st_blocks;
+
+ unsigned long st_atime;
+ unsigned long st_atime_nsec;
+ unsigned long st_mtime;
+ unsigned long st_mtime_nsec;
+
+ unsigned long st_ctime;
+ unsigned long st_ctime_nsec;
+ unsigned long __unused[2];
+};
+
+/* Syscalls for i386 :
+ * - mostly similar to x86_64
+ * - registers are 32-bit
+ * - syscall number is passed in eax
+ * - arguments are in ebx, ecx, edx, esi, edi, ebp respectively
+ * - all registers are preserved (except eax of course)
+ * - the system call is performed by calling int $0x80
+ * - syscall return comes in eax
+ * - the arguments are cast to long and assigned into the target registers
+ * which are then simply passed as registers to the asm code, so that we
+ * don't have to experience issues with register constraints.
+ * - the syscall number is always specified last in order to allow to force
+ * some registers before (gcc refuses a %-register at the last position).
+ *
+ * Also, i386 supports the old_select syscall if newselect is not available
+ */
+#define __ARCH_WANT_SYS_OLD_SELECT
+
+#define my_syscall0(num) \
+({ \
+ long _ret; \
+ register long _num __asm__ ("eax") = (num); \
+ \
+ __asm__ volatile ( \
+ "int $0x80\n" \
+ : "=a" (_ret) \
+ : "0"(_num) \
+ : "memory", "cc" \
+ ); \
+ _ret; \
+})
+
+#define my_syscall1(num, arg1) \
+({ \
+ long _ret; \
+ register long _num __asm__ ("eax") = (num); \
+ register long _arg1 __asm__ ("ebx") = (long)(arg1); \
+ \
+ __asm__ volatile ( \
+ "int $0x80\n" \
+ : "=a" (_ret) \
+ : "r"(_arg1), \
+ "0"(_num) \
+ : "memory", "cc" \
+ ); \
+ _ret; \
+})
+
+#define my_syscall2(num, arg1, arg2) \
+({ \
+ long _ret; \
+ register long _num __asm__ ("eax") = (num); \
+ register long _arg1 __asm__ ("ebx") = (long)(arg1); \
+ register long _arg2 __asm__ ("ecx") = (long)(arg2); \
+ \
+ __asm__ volatile ( \
+ "int $0x80\n" \
+ : "=a" (_ret) \
+ : "r"(_arg1), "r"(_arg2), \
+ "0"(_num) \
+ : "memory", "cc" \
+ ); \
+ _ret; \
+})
+
+#define my_syscall3(num, arg1, arg2, arg3) \
+({ \
+ long _ret; \
+ register long _num __asm__ ("eax") = (num); \
+ register long _arg1 __asm__ ("ebx") = (long)(arg1); \
+ register long _arg2 __asm__ ("ecx") = (long)(arg2); \
+ register long _arg3 __asm__ ("edx") = (long)(arg3); \
+ \
+ __asm__ volatile ( \
+ "int $0x80\n" \
+ : "=a" (_ret) \
+ : "r"(_arg1), "r"(_arg2), "r"(_arg3), \
+ "0"(_num) \
+ : "memory", "cc" \
+ ); \
+ _ret; \
+})
+
+#define my_syscall4(num, arg1, arg2, arg3, arg4) \
+({ \
+ long _ret; \
+ register long _num __asm__ ("eax") = (num); \
+ register long _arg1 __asm__ ("ebx") = (long)(arg1); \
+ register long _arg2 __asm__ ("ecx") = (long)(arg2); \
+ register long _arg3 __asm__ ("edx") = (long)(arg3); \
+ register long _arg4 __asm__ ("esi") = (long)(arg4); \
+ \
+ __asm__ volatile ( \
+ "int $0x80\n" \
+ : "=a" (_ret) \
+ : "r"(_arg1), "r"(_arg2), "r"(_arg3), "r"(_arg4), \
+ "0"(_num) \
+ : "memory", "cc" \
+ ); \
+ _ret; \
+})
+
+#define my_syscall5(num, arg1, arg2, arg3, arg4, arg5) \
+({ \
+ long _ret; \
+ register long _num __asm__ ("eax") = (num); \
+ register long _arg1 __asm__ ("ebx") = (long)(arg1); \
+ register long _arg2 __asm__ ("ecx") = (long)(arg2); \
+ register long _arg3 __asm__ ("edx") = (long)(arg3); \
+ register long _arg4 __asm__ ("esi") = (long)(arg4); \
+ register long _arg5 __asm__ ("edi") = (long)(arg5); \
+ \
+ __asm__ volatile ( \
+ "int $0x80\n" \
+ : "=a" (_ret) \
+ : "r"(_arg1), "r"(_arg2), "r"(_arg3), "r"(_arg4), "r"(_arg5), \
+ "0"(_num) \
+ : "memory", "cc" \
+ ); \
+ _ret; \
+})
+
+#define my_syscall6(num, arg1, arg2, arg3, arg4, arg5, arg6) \
+({ \
+ long _eax = (long)(num); \
+ long _arg6 = (long)(arg6); /* Always in memory */ \
+ __asm__ volatile ( \
+ "pushl %[_arg6]\n\t" \
+ "pushl %%ebp\n\t" \
+ "movl 4(%%esp),%%ebp\n\t" \
+ "int $0x80\n\t" \
+ "popl %%ebp\n\t" \
+ "addl $4,%%esp\n\t" \
+ : "+a"(_eax) /* %eax */ \
+ : "b"(arg1), /* %ebx */ \
+ "c"(arg2), /* %ecx */ \
+ "d"(arg3), /* %edx */ \
+ "S"(arg4), /* %esi */ \
+ "D"(arg5), /* %edi */ \
+ [_arg6]"m"(_arg6) /* memory */ \
+ : "memory", "cc" \
+ ); \
+ _eax; \
+})
+
+/* startup code */
+/*
+ * i386 System V ABI mandates:
+ * 1) last pushed argument must be 16-byte aligned.
+ * 2) The deepest stack frame should be set to zero
+ *
+ */
+__asm__ (".section .text\n"
+ ".weak _start\n"
+ "_start:\n"
+ "pop %eax\n" // argc (first arg, %eax)
+ "mov %esp, %ebx\n" // argv[] (second arg, %ebx)
+ "lea 4(%ebx,%eax,4),%ecx\n" // then a NULL then envp (third arg, %ecx)
+ "xor %ebp, %ebp\n" // zero the stack frame
+ "and $-16, %esp\n" // x86 ABI : esp must be 16-byte aligned before
+ "sub $4, %esp\n" // the call instruction (args are aligned)
+ "push %ecx\n" // push all registers on the stack so that we
+ "push %ebx\n" // support both regparm and plain stack modes
+ "push %eax\n"
+ "call main\n" // main() returns the status code in %eax
+ "mov %eax, %ebx\n" // retrieve exit code (32-bit int)
+ "movl $1, %eax\n" // NR_exit == 1
+ "int $0x80\n" // exit now
+ "hlt\n" // ensure it does not
+ "");
+
+#endif // _NOLIBC_ARCH_I386_H
diff --git a/tools/include/nolibc/arch-mips.h b/tools/include/nolibc/arch-mips.h
new file mode 100644
index 000000000..7380093ba
--- /dev/null
+++ b/tools/include/nolibc/arch-mips.h
@@ -0,0 +1,217 @@
+/* SPDX-License-Identifier: LGPL-2.1 OR MIT */
+/*
+ * MIPS specific definitions for NOLIBC
+ * Copyright (C) 2017-2022 Willy Tarreau <w@1wt.eu>
+ */
+
+#ifndef _NOLIBC_ARCH_MIPS_H
+#define _NOLIBC_ARCH_MIPS_H
+
+/* O_* macros for fcntl/open are architecture-specific */
+#define O_RDONLY 0
+#define O_WRONLY 1
+#define O_RDWR 2
+#define O_APPEND 0x0008
+#define O_NONBLOCK 0x0080
+#define O_CREAT 0x0100
+#define O_TRUNC 0x0200
+#define O_EXCL 0x0400
+#define O_NOCTTY 0x0800
+#define O_DIRECTORY 0x10000
+
+/* The struct returned by the stat() syscall. 88 bytes are returned by the
+ * syscall.
+ */
+struct sys_stat_struct {
+ unsigned int st_dev;
+ long st_pad1[3];
+ unsigned long st_ino;
+ unsigned int st_mode;
+ unsigned int st_nlink;
+ unsigned int st_uid;
+ unsigned int st_gid;
+ unsigned int st_rdev;
+ long st_pad2[2];
+ long st_size;
+ long st_pad3;
+
+ long st_atime;
+ long st_atime_nsec;
+ long st_mtime;
+ long st_mtime_nsec;
+
+ long st_ctime;
+ long st_ctime_nsec;
+ long st_blksize;
+ long st_blocks;
+ long st_pad4[14];
+};
+
+/* Syscalls for MIPS ABI O32 :
+ * - WARNING! there's always a delayed slot!
+ * - WARNING again, the syntax is different, registers take a '$' and numbers
+ * do not.
+ * - registers are 32-bit
+ * - stack is 8-byte aligned
+ * - syscall number is passed in v0 (starts at 0xfa0).
+ * - arguments are in a0, a1, a2, a3, then the stack. The caller needs to
+ * leave some room in the stack for the callee to save a0..a3 if needed.
+ * - Many registers are clobbered, in fact only a0..a2 and s0..s8 are
+ * preserved. See: https://www.linux-mips.org/wiki/Syscall as well as
+ * scall32-o32.S in the kernel sources.
+ * - the system call is performed by calling "syscall"
+ * - syscall return comes in v0, and register a3 needs to be checked to know
+ * if an error occurred, in which case errno is in v0.
+ * - the arguments are cast to long and assigned into the target registers
+ * which are then simply passed as registers to the asm code, so that we
+ * don't have to experience issues with register constraints.
+ */
+
+#define my_syscall0(num) \
+({ \
+ register long _num __asm__ ("v0") = (num); \
+ register long _arg4 __asm__ ("a3"); \
+ \
+ __asm__ volatile ( \
+ "addiu $sp, $sp, -32\n" \
+ "syscall\n" \
+ "addiu $sp, $sp, 32\n" \
+ : "=r"(_num), "=r"(_arg4) \
+ : "r"(_num) \
+ : "memory", "cc", "at", "v1", "hi", "lo", \
+ "t0", "t1", "t2", "t3", "t4", "t5", "t6", "t7", "t8", "t9" \
+ ); \
+ _arg4 ? -_num : _num; \
+})
+
+#define my_syscall1(num, arg1) \
+({ \
+ register long _num __asm__ ("v0") = (num); \
+ register long _arg1 __asm__ ("a0") = (long)(arg1); \
+ register long _arg4 __asm__ ("a3"); \
+ \
+ __asm__ volatile ( \
+ "addiu $sp, $sp, -32\n" \
+ "syscall\n" \
+ "addiu $sp, $sp, 32\n" \
+ : "=r"(_num), "=r"(_arg4) \
+ : "0"(_num), \
+ "r"(_arg1) \
+ : "memory", "cc", "at", "v1", "hi", "lo", \
+ "t0", "t1", "t2", "t3", "t4", "t5", "t6", "t7", "t8", "t9" \
+ ); \
+ _arg4 ? -_num : _num; \
+})
+
+#define my_syscall2(num, arg1, arg2) \
+({ \
+ register long _num __asm__ ("v0") = (num); \
+ register long _arg1 __asm__ ("a0") = (long)(arg1); \
+ register long _arg2 __asm__ ("a1") = (long)(arg2); \
+ register long _arg4 __asm__ ("a3"); \
+ \
+ __asm__ volatile ( \
+ "addiu $sp, $sp, -32\n" \
+ "syscall\n" \
+ "addiu $sp, $sp, 32\n" \
+ : "=r"(_num), "=r"(_arg4) \
+ : "0"(_num), \
+ "r"(_arg1), "r"(_arg2) \
+ : "memory", "cc", "at", "v1", "hi", "lo", \
+ "t0", "t1", "t2", "t3", "t4", "t5", "t6", "t7", "t8", "t9" \
+ ); \
+ _arg4 ? -_num : _num; \
+})
+
+#define my_syscall3(num, arg1, arg2, arg3) \
+({ \
+ register long _num __asm__ ("v0") = (num); \
+ register long _arg1 __asm__ ("a0") = (long)(arg1); \
+ register long _arg2 __asm__ ("a1") = (long)(arg2); \
+ register long _arg3 __asm__ ("a2") = (long)(arg3); \
+ register long _arg4 __asm__ ("a3"); \
+ \
+ __asm__ volatile ( \
+ "addiu $sp, $sp, -32\n" \
+ "syscall\n" \
+ "addiu $sp, $sp, 32\n" \
+ : "=r"(_num), "=r"(_arg4) \
+ : "0"(_num), \
+ "r"(_arg1), "r"(_arg2), "r"(_arg3) \
+ : "memory", "cc", "at", "v1", "hi", "lo", \
+ "t0", "t1", "t2", "t3", "t4", "t5", "t6", "t7", "t8", "t9" \
+ ); \
+ _arg4 ? -_num : _num; \
+})
+
+#define my_syscall4(num, arg1, arg2, arg3, arg4) \
+({ \
+ register long _num __asm__ ("v0") = (num); \
+ register long _arg1 __asm__ ("a0") = (long)(arg1); \
+ register long _arg2 __asm__ ("a1") = (long)(arg2); \
+ register long _arg3 __asm__ ("a2") = (long)(arg3); \
+ register long _arg4 __asm__ ("a3") = (long)(arg4); \
+ \
+ __asm__ volatile ( \
+ "addiu $sp, $sp, -32\n" \
+ "syscall\n" \
+ "addiu $sp, $sp, 32\n" \
+ : "=r" (_num), "=r"(_arg4) \
+ : "0"(_num), \
+ "r"(_arg1), "r"(_arg2), "r"(_arg3), "r"(_arg4) \
+ : "memory", "cc", "at", "v1", "hi", "lo", \
+ "t0", "t1", "t2", "t3", "t4", "t5", "t6", "t7", "t8", "t9" \
+ ); \
+ _arg4 ? -_num : _num; \
+})
+
+#define my_syscall5(num, arg1, arg2, arg3, arg4, arg5) \
+({ \
+ register long _num __asm__ ("v0") = (num); \
+ register long _arg1 __asm__ ("a0") = (long)(arg1); \
+ register long _arg2 __asm__ ("a1") = (long)(arg2); \
+ register long _arg3 __asm__ ("a2") = (long)(arg3); \
+ register long _arg4 __asm__ ("a3") = (long)(arg4); \
+ register long _arg5 = (long)(arg5); \
+ \
+ __asm__ volatile ( \
+ "addiu $sp, $sp, -32\n" \
+ "sw %7, 16($sp)\n" \
+ "syscall\n " \
+ "addiu $sp, $sp, 32\n" \
+ : "=r" (_num), "=r"(_arg4) \
+ : "0"(_num), \
+ "r"(_arg1), "r"(_arg2), "r"(_arg3), "r"(_arg4), "r"(_arg5) \
+ : "memory", "cc", "at", "v1", "hi", "lo", \
+ "t0", "t1", "t2", "t3", "t4", "t5", "t6", "t7", "t8", "t9" \
+ ); \
+ _arg4 ? -_num : _num; \
+})
+
+/* startup code, note that it's called __start on MIPS */
+__asm__ (".section .text\n"
+ ".weak __start\n"
+ ".set nomips16\n"
+ ".set push\n"
+ ".set noreorder\n"
+ ".option pic0\n"
+ ".ent __start\n"
+ "__start:\n"
+ "lw $a0,($sp)\n" // argc was in the stack
+ "addiu $a1, $sp, 4\n" // argv = sp + 4
+ "sll $a2, $a0, 2\n" // a2 = argc * 4
+ "add $a2, $a2, $a1\n" // envp = argv + 4*argc ...
+ "addiu $a2, $a2, 4\n" // ... + 4
+ "li $t0, -8\n"
+ "and $sp, $sp, $t0\n" // sp must be 8-byte aligned
+ "addiu $sp,$sp,-16\n" // the callee expects to save a0..a3 there!
+ "jal main\n" // main() returns the status code, we'll exit with it.
+ "nop\n" // delayed slot
+ "move $a0, $v0\n" // retrieve 32-bit exit code from v0
+ "li $v0, 4001\n" // NR_exit == 4001
+ "syscall\n"
+ ".end __start\n"
+ ".set pop\n"
+ "");
+
+#endif // _NOLIBC_ARCH_MIPS_H
diff --git a/tools/include/nolibc/arch-riscv.h b/tools/include/nolibc/arch-riscv.h
new file mode 100644
index 000000000..a3bdd9803
--- /dev/null
+++ b/tools/include/nolibc/arch-riscv.h
@@ -0,0 +1,204 @@
+/* SPDX-License-Identifier: LGPL-2.1 OR MIT */
+/*
+ * RISCV (32 and 64) specific definitions for NOLIBC
+ * Copyright (C) 2017-2022 Willy Tarreau <w@1wt.eu>
+ */
+
+#ifndef _NOLIBC_ARCH_RISCV_H
+#define _NOLIBC_ARCH_RISCV_H
+
+/* O_* macros for fcntl/open are architecture-specific */
+#define O_RDONLY 0
+#define O_WRONLY 1
+#define O_RDWR 2
+#define O_CREAT 0x40
+#define O_EXCL 0x80
+#define O_NOCTTY 0x100
+#define O_TRUNC 0x200
+#define O_APPEND 0x400
+#define O_NONBLOCK 0x800
+#define O_DIRECTORY 0x10000
+
+struct sys_stat_struct {
+ unsigned long st_dev; /* Device. */
+ unsigned long st_ino; /* File serial number. */
+ unsigned int st_mode; /* File mode. */
+ unsigned int st_nlink; /* Link count. */
+ unsigned int st_uid; /* User ID of the file's owner. */
+ unsigned int st_gid; /* Group ID of the file's group. */
+ unsigned long st_rdev; /* Device number, if device. */
+ unsigned long __pad1;
+ long st_size; /* Size of file, in bytes. */
+ int st_blksize; /* Optimal block size for I/O. */
+ int __pad2;
+ long st_blocks; /* Number 512-byte blocks allocated. */
+ long st_atime; /* Time of last access. */
+ unsigned long st_atime_nsec;
+ long st_mtime; /* Time of last modification. */
+ unsigned long st_mtime_nsec;
+ long st_ctime; /* Time of last status change. */
+ unsigned long st_ctime_nsec;
+ unsigned int __unused4;
+ unsigned int __unused5;
+};
+
+#if __riscv_xlen == 64
+#define PTRLOG "3"
+#define SZREG "8"
+#elif __riscv_xlen == 32
+#define PTRLOG "2"
+#define SZREG "4"
+#endif
+
+/* Syscalls for RISCV :
+ * - stack is 16-byte aligned
+ * - syscall number is passed in a7
+ * - arguments are in a0, a1, a2, a3, a4, a5
+ * - the system call is performed by calling ecall
+ * - syscall return comes in a0
+ * - the arguments are cast to long and assigned into the target
+ * registers which are then simply passed as registers to the asm code,
+ * so that we don't have to experience issues with register constraints.
+ *
+ * On riscv, select() is not implemented so we have to use pselect6().
+ */
+#define __ARCH_WANT_SYS_PSELECT6
+
+#define my_syscall0(num) \
+({ \
+ register long _num __asm__ ("a7") = (num); \
+ register long _arg1 __asm__ ("a0"); \
+ \
+ __asm__ volatile ( \
+ "ecall\n\t" \
+ : "=r"(_arg1) \
+ : "r"(_num) \
+ : "memory", "cc" \
+ ); \
+ _arg1; \
+})
+
+#define my_syscall1(num, arg1) \
+({ \
+ register long _num __asm__ ("a7") = (num); \
+ register long _arg1 __asm__ ("a0") = (long)(arg1); \
+ \
+ __asm__ volatile ( \
+ "ecall\n" \
+ : "+r"(_arg1) \
+ : "r"(_num) \
+ : "memory", "cc" \
+ ); \
+ _arg1; \
+})
+
+#define my_syscall2(num, arg1, arg2) \
+({ \
+ register long _num __asm__ ("a7") = (num); \
+ register long _arg1 __asm__ ("a0") = (long)(arg1); \
+ register long _arg2 __asm__ ("a1") = (long)(arg2); \
+ \
+ __asm__ volatile ( \
+ "ecall\n" \
+ : "+r"(_arg1) \
+ : "r"(_arg2), \
+ "r"(_num) \
+ : "memory", "cc" \
+ ); \
+ _arg1; \
+})
+
+#define my_syscall3(num, arg1, arg2, arg3) \
+({ \
+ register long _num __asm__ ("a7") = (num); \
+ register long _arg1 __asm__ ("a0") = (long)(arg1); \
+ register long _arg2 __asm__ ("a1") = (long)(arg2); \
+ register long _arg3 __asm__ ("a2") = (long)(arg3); \
+ \
+ __asm__ volatile ( \
+ "ecall\n\t" \
+ : "+r"(_arg1) \
+ : "r"(_arg2), "r"(_arg3), \
+ "r"(_num) \
+ : "memory", "cc" \
+ ); \
+ _arg1; \
+})
+
+#define my_syscall4(num, arg1, arg2, arg3, arg4) \
+({ \
+ register long _num __asm__ ("a7") = (num); \
+ register long _arg1 __asm__ ("a0") = (long)(arg1); \
+ register long _arg2 __asm__ ("a1") = (long)(arg2); \
+ register long _arg3 __asm__ ("a2") = (long)(arg3); \
+ register long _arg4 __asm__ ("a3") = (long)(arg4); \
+ \
+ __asm__ volatile ( \
+ "ecall\n" \
+ : "+r"(_arg1) \
+ : "r"(_arg2), "r"(_arg3), "r"(_arg4), \
+ "r"(_num) \
+ : "memory", "cc" \
+ ); \
+ _arg1; \
+})
+
+#define my_syscall5(num, arg1, arg2, arg3, arg4, arg5) \
+({ \
+ register long _num __asm__ ("a7") = (num); \
+ register long _arg1 __asm__ ("a0") = (long)(arg1); \
+ register long _arg2 __asm__ ("a1") = (long)(arg2); \
+ register long _arg3 __asm__ ("a2") = (long)(arg3); \
+ register long _arg4 __asm__ ("a3") = (long)(arg4); \
+ register long _arg5 __asm__ ("a4") = (long)(arg5); \
+ \
+ __asm__ volatile ( \
+ "ecall\n" \
+ : "+r"(_arg1) \
+ : "r"(_arg2), "r"(_arg3), "r"(_arg4), "r"(_arg5), \
+ "r"(_num) \
+ : "memory", "cc" \
+ ); \
+ _arg1; \
+})
+
+#define my_syscall6(num, arg1, arg2, arg3, arg4, arg5, arg6) \
+({ \
+ register long _num __asm__ ("a7") = (num); \
+ register long _arg1 __asm__ ("a0") = (long)(arg1); \
+ register long _arg2 __asm__ ("a1") = (long)(arg2); \
+ register long _arg3 __asm__ ("a2") = (long)(arg3); \
+ register long _arg4 __asm__ ("a3") = (long)(arg4); \
+ register long _arg5 __asm__ ("a4") = (long)(arg5); \
+ register long _arg6 __asm__ ("a5") = (long)(arg6); \
+ \
+ __asm__ volatile ( \
+ "ecall\n" \
+ : "+r"(_arg1) \
+ : "r"(_arg2), "r"(_arg3), "r"(_arg4), "r"(_arg5), "r"(_arg6), \
+ "r"(_num) \
+ : "memory", "cc" \
+ ); \
+ _arg1; \
+})
+
+/* startup code */
+__asm__ (".section .text\n"
+ ".weak _start\n"
+ "_start:\n"
+ ".option push\n"
+ ".option norelax\n"
+ "lla gp, __global_pointer$\n"
+ ".option pop\n"
+ "lw a0, 0(sp)\n" // argc (a0) was in the stack
+ "add a1, sp, "SZREG"\n" // argv (a1) = sp
+ "slli a2, a0, "PTRLOG"\n" // envp (a2) = SZREG*argc ...
+ "add a2, a2, "SZREG"\n" // + SZREG (skip null)
+ "add a2,a2,a1\n" // + argv
+ "andi sp,a1,-16\n" // sp must be 16-byte aligned
+ "call main\n" // main() returns the status code, we'll exit with it.
+ "li a7, 93\n" // NR_exit == 93
+ "ecall\n"
+ "");
+
+#endif // _NOLIBC_ARCH_RISCV_H
diff --git a/tools/include/nolibc/arch-x86_64.h b/tools/include/nolibc/arch-x86_64.h
new file mode 100644
index 000000000..0e1e9eb85
--- /dev/null
+++ b/tools/include/nolibc/arch-x86_64.h
@@ -0,0 +1,215 @@
+/* SPDX-License-Identifier: LGPL-2.1 OR MIT */
+/*
+ * x86_64 specific definitions for NOLIBC
+ * Copyright (C) 2017-2022 Willy Tarreau <w@1wt.eu>
+ */
+
+#ifndef _NOLIBC_ARCH_X86_64_H
+#define _NOLIBC_ARCH_X86_64_H
+
+/* O_* macros for fcntl/open are architecture-specific */
+#define O_RDONLY 0
+#define O_WRONLY 1
+#define O_RDWR 2
+#define O_CREAT 0x40
+#define O_EXCL 0x80
+#define O_NOCTTY 0x100
+#define O_TRUNC 0x200
+#define O_APPEND 0x400
+#define O_NONBLOCK 0x800
+#define O_DIRECTORY 0x10000
+
+/* The struct returned by the stat() syscall, equivalent to stat64(). The
+ * syscall returns 116 bytes and stops in the middle of __unused.
+ */
+struct sys_stat_struct {
+ unsigned long st_dev;
+ unsigned long st_ino;
+ unsigned long st_nlink;
+ unsigned int st_mode;
+ unsigned int st_uid;
+
+ unsigned int st_gid;
+ unsigned int __pad0;
+ unsigned long st_rdev;
+ long st_size;
+ long st_blksize;
+
+ long st_blocks;
+ unsigned long st_atime;
+ unsigned long st_atime_nsec;
+ unsigned long st_mtime;
+
+ unsigned long st_mtime_nsec;
+ unsigned long st_ctime;
+ unsigned long st_ctime_nsec;
+ long __unused[3];
+};
+
+/* Syscalls for x86_64 :
+ * - registers are 64-bit
+ * - syscall number is passed in rax
+ * - arguments are in rdi, rsi, rdx, r10, r8, r9 respectively
+ * - the system call is performed by calling the syscall instruction
+ * - syscall return comes in rax
+ * - rcx and r11 are clobbered, others are preserved.
+ * - the arguments are cast to long and assigned into the target registers
+ * which are then simply passed as registers to the asm code, so that we
+ * don't have to experience issues with register constraints.
+ * - the syscall number is always specified last in order to allow to force
+ * some registers before (gcc refuses a %-register at the last position).
+ * - see also x86-64 ABI section A.2 AMD64 Linux Kernel Conventions, A.2.1
+ * Calling Conventions.
+ *
+ * Link x86-64 ABI: https://gitlab.com/x86-psABIs/x86-64-ABI/-/wikis/home
+ *
+ */
+
+#define my_syscall0(num) \
+({ \
+ long _ret; \
+ register long _num __asm__ ("rax") = (num); \
+ \
+ __asm__ volatile ( \
+ "syscall\n" \
+ : "=a"(_ret) \
+ : "0"(_num) \
+ : "rcx", "r11", "memory", "cc" \
+ ); \
+ _ret; \
+})
+
+#define my_syscall1(num, arg1) \
+({ \
+ long _ret; \
+ register long _num __asm__ ("rax") = (num); \
+ register long _arg1 __asm__ ("rdi") = (long)(arg1); \
+ \
+ __asm__ volatile ( \
+ "syscall\n" \
+ : "=a"(_ret) \
+ : "r"(_arg1), \
+ "0"(_num) \
+ : "rcx", "r11", "memory", "cc" \
+ ); \
+ _ret; \
+})
+
+#define my_syscall2(num, arg1, arg2) \
+({ \
+ long _ret; \
+ register long _num __asm__ ("rax") = (num); \
+ register long _arg1 __asm__ ("rdi") = (long)(arg1); \
+ register long _arg2 __asm__ ("rsi") = (long)(arg2); \
+ \
+ __asm__ volatile ( \
+ "syscall\n" \
+ : "=a"(_ret) \
+ : "r"(_arg1), "r"(_arg2), \
+ "0"(_num) \
+ : "rcx", "r11", "memory", "cc" \
+ ); \
+ _ret; \
+})
+
+#define my_syscall3(num, arg1, arg2, arg3) \
+({ \
+ long _ret; \
+ register long _num __asm__ ("rax") = (num); \
+ register long _arg1 __asm__ ("rdi") = (long)(arg1); \
+ register long _arg2 __asm__ ("rsi") = (long)(arg2); \
+ register long _arg3 __asm__ ("rdx") = (long)(arg3); \
+ \
+ __asm__ volatile ( \
+ "syscall\n" \
+ : "=a"(_ret) \
+ : "r"(_arg1), "r"(_arg2), "r"(_arg3), \
+ "0"(_num) \
+ : "rcx", "r11", "memory", "cc" \
+ ); \
+ _ret; \
+})
+
+#define my_syscall4(num, arg1, arg2, arg3, arg4) \
+({ \
+ long _ret; \
+ register long _num __asm__ ("rax") = (num); \
+ register long _arg1 __asm__ ("rdi") = (long)(arg1); \
+ register long _arg2 __asm__ ("rsi") = (long)(arg2); \
+ register long _arg3 __asm__ ("rdx") = (long)(arg3); \
+ register long _arg4 __asm__ ("r10") = (long)(arg4); \
+ \
+ __asm__ volatile ( \
+ "syscall\n" \
+ : "=a"(_ret) \
+ : "r"(_arg1), "r"(_arg2), "r"(_arg3), "r"(_arg4), \
+ "0"(_num) \
+ : "rcx", "r11", "memory", "cc" \
+ ); \
+ _ret; \
+})
+
+#define my_syscall5(num, arg1, arg2, arg3, arg4, arg5) \
+({ \
+ long _ret; \
+ register long _num __asm__ ("rax") = (num); \
+ register long _arg1 __asm__ ("rdi") = (long)(arg1); \
+ register long _arg2 __asm__ ("rsi") = (long)(arg2); \
+ register long _arg3 __asm__ ("rdx") = (long)(arg3); \
+ register long _arg4 __asm__ ("r10") = (long)(arg4); \
+ register long _arg5 __asm__ ("r8") = (long)(arg5); \
+ \
+ __asm__ volatile ( \
+ "syscall\n" \
+ : "=a"(_ret) \
+ : "r"(_arg1), "r"(_arg2), "r"(_arg3), "r"(_arg4), "r"(_arg5), \
+ "0"(_num) \
+ : "rcx", "r11", "memory", "cc" \
+ ); \
+ _ret; \
+})
+
+#define my_syscall6(num, arg1, arg2, arg3, arg4, arg5, arg6) \
+({ \
+ long _ret; \
+ register long _num __asm__ ("rax") = (num); \
+ register long _arg1 __asm__ ("rdi") = (long)(arg1); \
+ register long _arg2 __asm__ ("rsi") = (long)(arg2); \
+ register long _arg3 __asm__ ("rdx") = (long)(arg3); \
+ register long _arg4 __asm__ ("r10") = (long)(arg4); \
+ register long _arg5 __asm__ ("r8") = (long)(arg5); \
+ register long _arg6 __asm__ ("r9") = (long)(arg6); \
+ \
+ __asm__ volatile ( \
+ "syscall\n" \
+ : "=a"(_ret) \
+ : "r"(_arg1), "r"(_arg2), "r"(_arg3), "r"(_arg4), "r"(_arg5), \
+ "r"(_arg6), "0"(_num) \
+ : "rcx", "r11", "memory", "cc" \
+ ); \
+ _ret; \
+})
+
+/* startup code */
+/*
+ * x86-64 System V ABI mandates:
+ * 1) %rsp must be 16-byte aligned right before the function call.
+ * 2) The deepest stack frame should be zero (the %rbp).
+ *
+ */
+__asm__ (".section .text\n"
+ ".weak _start\n"
+ "_start:\n"
+ "pop %rdi\n" // argc (first arg, %rdi)
+ "mov %rsp, %rsi\n" // argv[] (second arg, %rsi)
+ "lea 8(%rsi,%rdi,8),%rdx\n" // then a NULL then envp (third arg, %rdx)
+ "xor %ebp, %ebp\n" // zero the stack frame
+ "and $-16, %rsp\n" // x86 ABI : esp must be 16-byte aligned before call
+ "call main\n" // main() returns the status code, we'll exit with it.
+ "mov %eax, %edi\n" // retrieve exit code (32 bit)
+ "mov $60, %eax\n" // NR_exit == 60
+ "syscall\n" // really exit
+ "hlt\n" // ensure it does not return
+ "");
+
+#endif // _NOLIBC_ARCH_X86_64_H
diff --git a/tools/include/nolibc/arch.h b/tools/include/nolibc/arch.h
new file mode 100644
index 000000000..4c6992321
--- /dev/null
+++ b/tools/include/nolibc/arch.h
@@ -0,0 +1,32 @@
+/* SPDX-License-Identifier: LGPL-2.1 OR MIT */
+/*
+ * Copyright (C) 2017-2022 Willy Tarreau <w@1wt.eu>
+ */
+
+/* Below comes the architecture-specific code. For each architecture, we have
+ * the syscall declarations and the _start code definition. This is the only
+ * global part. On all architectures the kernel puts everything in the stack
+ * before jumping to _start just above us, without any return address (_start
+ * is not a function but an entry pint). So at the stack pointer we find argc.
+ * Then argv[] begins, and ends at the first NULL. Then we have envp which
+ * starts and ends with a NULL as well. So envp=argv+argc+1.
+ */
+
+#ifndef _NOLIBC_ARCH_H
+#define _NOLIBC_ARCH_H
+
+#if defined(__x86_64__)
+#include "arch-x86_64.h"
+#elif defined(__i386__) || defined(__i486__) || defined(__i586__) || defined(__i686__)
+#include "arch-i386.h"
+#elif defined(__ARM_EABI__)
+#include "arch-arm.h"
+#elif defined(__aarch64__)
+#include "arch-aarch64.h"
+#elif defined(__mips__) && defined(_ABIO32)
+#include "arch-mips.h"
+#elif defined(__riscv)
+#include "arch-riscv.h"
+#endif
+
+#endif /* _NOLIBC_ARCH_H */
diff --git a/tools/include/nolibc/ctype.h b/tools/include/nolibc/ctype.h
new file mode 100644
index 000000000..6f90706d0
--- /dev/null
+++ b/tools/include/nolibc/ctype.h
@@ -0,0 +1,102 @@
+/* SPDX-License-Identifier: LGPL-2.1 OR MIT */
+/*
+ * ctype function definitions for NOLIBC
+ * Copyright (C) 2017-2021 Willy Tarreau <w@1wt.eu>
+ */
+
+#ifndef _NOLIBC_CTYPE_H
+#define _NOLIBC_CTYPE_H
+
+#include "std.h"
+
+/*
+ * As much as possible, please keep functions alphabetically sorted.
+ */
+
+static __attribute__((unused))
+int isascii(int c)
+{
+ /* 0x00..0x7f */
+ return (unsigned int)c <= 0x7f;
+}
+
+static __attribute__((unused))
+int isblank(int c)
+{
+ return c == '\t' || c == ' ';
+}
+
+static __attribute__((unused))
+int iscntrl(int c)
+{
+ /* 0x00..0x1f, 0x7f */
+ return (unsigned int)c < 0x20 || c == 0x7f;
+}
+
+static __attribute__((unused))
+int isdigit(int c)
+{
+ return (unsigned int)(c - '0') < 10;
+}
+
+static __attribute__((unused))
+int isgraph(int c)
+{
+ /* 0x21..0x7e */
+ return (unsigned int)(c - 0x21) < 0x5e;
+}
+
+static __attribute__((unused))
+int islower(int c)
+{
+ return (unsigned int)(c - 'a') < 26;
+}
+
+static __attribute__((unused))
+int isprint(int c)
+{
+ /* 0x20..0x7e */
+ return (unsigned int)(c - 0x20) < 0x5f;
+}
+
+static __attribute__((unused))
+int isspace(int c)
+{
+ /* \t is 0x9, \n is 0xA, \v is 0xB, \f is 0xC, \r is 0xD */
+ return ((unsigned int)c == ' ') || (unsigned int)(c - 0x09) < 5;
+}
+
+static __attribute__((unused))
+int isupper(int c)
+{
+ return (unsigned int)(c - 'A') < 26;
+}
+
+static __attribute__((unused))
+int isxdigit(int c)
+{
+ return isdigit(c) || (unsigned int)(c - 'A') < 6 || (unsigned int)(c - 'a') < 6;
+}
+
+static __attribute__((unused))
+int isalpha(int c)
+{
+ return islower(c) || isupper(c);
+}
+
+static __attribute__((unused))
+int isalnum(int c)
+{
+ return isalpha(c) || isdigit(c);
+}
+
+static __attribute__((unused))
+int ispunct(int c)
+{
+ return isgraph(c) && !isalnum(c);
+}
+
+/* make sure to include all global symbols */
+#include "nolibc.h"
+
+#endif /* _NOLIBC_CTYPE_H */
diff --git a/tools/include/nolibc/errno.h b/tools/include/nolibc/errno.h
new file mode 100644
index 000000000..9dc4919c7
--- /dev/null
+++ b/tools/include/nolibc/errno.h
@@ -0,0 +1,30 @@
+/* SPDX-License-Identifier: LGPL-2.1 OR MIT */
+/*
+ * Minimal errno definitions for NOLIBC
+ * Copyright (C) 2017-2022 Willy Tarreau <w@1wt.eu>
+ */
+
+#ifndef _NOLIBC_ERRNO_H
+#define _NOLIBC_ERRNO_H
+
+#include <asm/errno.h>
+
+/* this way it will be removed if unused */
+static int errno;
+
+#ifndef NOLIBC_IGNORE_ERRNO
+#define SET_ERRNO(v) do { errno = (v); } while (0)
+#else
+#define SET_ERRNO(v) do { } while (0)
+#endif
+
+
+/* errno codes all ensure that they will not conflict with a valid pointer
+ * because they all correspond to the highest addressable memory page.
+ */
+#define MAX_ERRNO 4095
+
+/* make sure to include all global symbols */
+#include "nolibc.h"
+
+#endif /* _NOLIBC_ERRNO_H */
diff --git a/tools/include/nolibc/nolibc.h b/tools/include/nolibc/nolibc.h
new file mode 100644
index 000000000..b2bc48d3c
--- /dev/null
+++ b/tools/include/nolibc/nolibc.h
@@ -0,0 +1,111 @@
+/* SPDX-License-Identifier: LGPL-2.1 OR MIT */
+/* nolibc.h
+ * Copyright (C) 2017-2018 Willy Tarreau <w@1wt.eu>
+ */
+
+/*
+ * This file is designed to be used as a libc alternative for minimal programs
+ * with very limited requirements. It consists of a small number of syscall and
+ * type definitions, and the minimal startup code needed to call main().
+ * All syscalls are declared as static functions so that they can be optimized
+ * away by the compiler when not used.
+ *
+ * Syscalls are split into 3 levels:
+ * - The lower level is the arch-specific syscall() definition, consisting in
+ * assembly code in compound expressions. These are called my_syscall0() to
+ * my_syscall6() depending on the number of arguments. The MIPS
+ * implementation is limited to 5 arguments. All input arguments are cast
+ * to a long stored in a register. These expressions always return the
+ * syscall's return value as a signed long value which is often either a
+ * pointer or the negated errno value.
+ *
+ * - The second level is mostly architecture-independent. It is made of
+ * static functions called sys_<name>() which rely on my_syscallN()
+ * depending on the syscall definition. These functions are responsible
+ * for exposing the appropriate types for the syscall arguments (int,
+ * pointers, etc) and for setting the appropriate return type (often int).
+ * A few of them are architecture-specific because the syscalls are not all
+ * mapped exactly the same among architectures. For example, some archs do
+ * not implement select() and need pselect6() instead, so the sys_select()
+ * function will have to abstract this.
+ *
+ * - The third level is the libc call definition. It exposes the lower raw
+ * sys_<name>() calls in a way that looks like what a libc usually does,
+ * takes care of specific input values, and of setting errno upon error.
+ * There can be minor variations compared to standard libc calls. For
+ * example the open() call always takes 3 args here.
+ *
+ * The errno variable is declared static and unused. This way it can be
+ * optimized away if not used. However this means that a program made of
+ * multiple C files may observe different errno values (one per C file). For
+ * the type of programs this project targets it usually is not a problem. The
+ * resulting program may even be reduced by defining the NOLIBC_IGNORE_ERRNO
+ * macro, in which case the errno value will never be assigned.
+ *
+ * Some stdint-like integer types are defined. These are valid on all currently
+ * supported architectures, because signs are enforced, ints are assumed to be
+ * 32 bits, longs the size of a pointer and long long 64 bits. If more
+ * architectures have to be supported, this may need to be adapted.
+ *
+ * Some macro definitions like the O_* values passed to open(), and some
+ * structures like the sys_stat struct depend on the architecture.
+ *
+ * The definitions start with the architecture-specific parts, which are picked
+ * based on what the compiler knows about the target architecture, and are
+ * completed with the generic code. Since it is the compiler which sets the
+ * target architecture, cross-compiling normally works out of the box without
+ * having to specify anything.
+ *
+ * Finally some very common libc-level functions are provided. It is the case
+ * for a few functions usually found in string.h, ctype.h, or stdlib.h.
+ *
+ * The nolibc.h file is only a convenient entry point which includes all other
+ * files. It also defines the NOLIBC macro, so that it is possible for a
+ * program to check this macro to know if it is being built against and decide
+ * to disable some features or simply not to include some standard libc files.
+ *
+ * A simple static executable may be built this way :
+ * $ gcc -fno-asynchronous-unwind-tables -fno-ident -s -Os -nostdlib \
+ * -static -include nolibc.h -o hello hello.c -lgcc
+ *
+ * Simple programs meant to be reasonably portable to various libc and using
+ * only a few common includes, may also be built by simply making the include
+ * path point to the nolibc directory:
+ * $ gcc -fno-asynchronous-unwind-tables -fno-ident -s -Os -nostdlib \
+ * -I../nolibc -o hello hello.c -lgcc
+ *
+ * The available standard (but limited) include files are:
+ * ctype.h, errno.h, signal.h, stdio.h, stdlib.h, string.h, time.h
+ *
+ * In addition, the following ones are expected to be provided by the compiler:
+ * float.h, stdarg.h, stddef.h
+ *
+ * The following ones which are part to the C standard are not provided:
+ * assert.h, locale.h, math.h, setjmp.h, limits.h
+ *
+ * A very useful calling convention table may be found here :
+ * http://man7.org/linux/man-pages/man2/syscall.2.html
+ *
+ * This doc is quite convenient though not necessarily up to date :
+ * https://w3challs.com/syscalls/
+ *
+ */
+#ifndef _NOLIBC_H
+#define _NOLIBC_H
+
+#include "std.h"
+#include "arch.h"
+#include "types.h"
+#include "sys.h"
+#include "ctype.h"
+#include "signal.h"
+#include "stdio.h"
+#include "stdlib.h"
+#include "string.h"
+#include "time.h"
+#include "unistd.h"
+
+/* Used by programs to avoid std includes */
+#define NOLIBC
+
+#endif /* _NOLIBC_H */
diff --git a/tools/include/nolibc/signal.h b/tools/include/nolibc/signal.h
new file mode 100644
index 000000000..137552216
--- /dev/null
+++ b/tools/include/nolibc/signal.h
@@ -0,0 +1,25 @@
+/* SPDX-License-Identifier: LGPL-2.1 OR MIT */
+/*
+ * signal function definitions for NOLIBC
+ * Copyright (C) 2017-2022 Willy Tarreau <w@1wt.eu>
+ */
+
+#ifndef _NOLIBC_SIGNAL_H
+#define _NOLIBC_SIGNAL_H
+
+#include "std.h"
+#include "arch.h"
+#include "types.h"
+#include "sys.h"
+
+/* This one is not marked static as it's needed by libgcc for divide by zero */
+__attribute__((weak,unused,section(".text.nolibc_raise")))
+int raise(int signal)
+{
+ return sys_kill(sys_getpid(), signal);
+}
+
+/* make sure to include all global symbols */
+#include "nolibc.h"
+
+#endif /* _NOLIBC_SIGNAL_H */
diff --git a/tools/include/nolibc/std.h b/tools/include/nolibc/std.h
new file mode 100644
index 000000000..1747ae125
--- /dev/null
+++ b/tools/include/nolibc/std.h
@@ -0,0 +1,49 @@
+/* SPDX-License-Identifier: LGPL-2.1 OR MIT */
+/*
+ * Standard definitions and types for NOLIBC
+ * Copyright (C) 2017-2021 Willy Tarreau <w@1wt.eu>
+ */
+
+#ifndef _NOLIBC_STD_H
+#define _NOLIBC_STD_H
+
+/* Declare a few quite common macros and types that usually are in stdlib.h,
+ * stdint.h, ctype.h, unistd.h and a few other common locations. Please place
+ * integer type definitions and generic macros here, but avoid OS-specific and
+ * syscall-specific stuff, as this file is expected to be included very early.
+ */
+
+/* note: may already be defined */
+#ifndef NULL
+#define NULL ((void *)0)
+#endif
+
+/* stdint types */
+typedef unsigned char uint8_t;
+typedef signed char int8_t;
+typedef unsigned short uint16_t;
+typedef signed short int16_t;
+typedef unsigned int uint32_t;
+typedef signed int int32_t;
+typedef unsigned long long uint64_t;
+typedef signed long long int64_t;
+typedef unsigned long size_t;
+typedef signed long ssize_t;
+typedef unsigned long uintptr_t;
+typedef signed long intptr_t;
+typedef signed long ptrdiff_t;
+
+/* those are commonly provided by sys/types.h */
+typedef unsigned int dev_t;
+typedef unsigned long ino_t;
+typedef unsigned int mode_t;
+typedef signed int pid_t;
+typedef unsigned int uid_t;
+typedef unsigned int gid_t;
+typedef unsigned long nlink_t;
+typedef signed long off_t;
+typedef signed long blksize_t;
+typedef signed long blkcnt_t;
+typedef signed long time_t;
+
+#endif /* _NOLIBC_STD_H */
diff --git a/tools/include/nolibc/stdio.h b/tools/include/nolibc/stdio.h
new file mode 100644
index 000000000..96ac8afc5
--- /dev/null
+++ b/tools/include/nolibc/stdio.h
@@ -0,0 +1,309 @@
+/* SPDX-License-Identifier: LGPL-2.1 OR MIT */
+/*
+ * minimal stdio function definitions for NOLIBC
+ * Copyright (C) 2017-2021 Willy Tarreau <w@1wt.eu>
+ */
+
+#ifndef _NOLIBC_STDIO_H
+#define _NOLIBC_STDIO_H
+
+#include <stdarg.h>
+
+#include "std.h"
+#include "arch.h"
+#include "errno.h"
+#include "types.h"
+#include "sys.h"
+#include "stdlib.h"
+#include "string.h"
+
+#ifndef EOF
+#define EOF (-1)
+#endif
+
+/* just define FILE as a non-empty type */
+typedef struct FILE {
+ char dummy[1];
+} FILE;
+
+/* We define the 3 common stdio files as constant invalid pointers that
+ * are easily recognized.
+ */
+static __attribute__((unused)) FILE* const stdin = (FILE*)-3;
+static __attribute__((unused)) FILE* const stdout = (FILE*)-2;
+static __attribute__((unused)) FILE* const stderr = (FILE*)-1;
+
+/* getc(), fgetc(), getchar() */
+
+#define getc(stream) fgetc(stream)
+
+static __attribute__((unused))
+int fgetc(FILE* stream)
+{
+ unsigned char ch;
+ int fd;
+
+ if (stream < stdin || stream > stderr)
+ return EOF;
+
+ fd = 3 + (long)stream;
+
+ if (read(fd, &ch, 1) <= 0)
+ return EOF;
+ return ch;
+}
+
+static __attribute__((unused))
+int getchar(void)
+{
+ return fgetc(stdin);
+}
+
+
+/* putc(), fputc(), putchar() */
+
+#define putc(c, stream) fputc(c, stream)
+
+static __attribute__((unused))
+int fputc(int c, FILE* stream)
+{
+ unsigned char ch = c;
+ int fd;
+
+ if (stream < stdin || stream > stderr)
+ return EOF;
+
+ fd = 3 + (long)stream;
+
+ if (write(fd, &ch, 1) <= 0)
+ return EOF;
+ return ch;
+}
+
+static __attribute__((unused))
+int putchar(int c)
+{
+ return fputc(c, stdout);
+}
+
+
+/* fwrite(), puts(), fputs(). Note that puts() emits '\n' but not fputs(). */
+
+/* internal fwrite()-like function which only takes a size and returns 0 on
+ * success or EOF on error. It automatically retries on short writes.
+ */
+static __attribute__((unused))
+int _fwrite(const void *buf, size_t size, FILE *stream)
+{
+ ssize_t ret;
+ int fd;
+
+ if (stream < stdin || stream > stderr)
+ return EOF;
+
+ fd = 3 + (long)stream;
+
+ while (size) {
+ ret = write(fd, buf, size);
+ if (ret <= 0)
+ return EOF;
+ size -= ret;
+ buf += ret;
+ }
+ return 0;
+}
+
+static __attribute__((unused))
+size_t fwrite(const void *s, size_t size, size_t nmemb, FILE *stream)
+{
+ size_t written;
+
+ for (written = 0; written < nmemb; written++) {
+ if (_fwrite(s, size, stream) != 0)
+ break;
+ s += size;
+ }
+ return written;
+}
+
+static __attribute__((unused))
+int fputs(const char *s, FILE *stream)
+{
+ return _fwrite(s, strlen(s), stream);
+}
+
+static __attribute__((unused))
+int puts(const char *s)
+{
+ if (fputs(s, stdout) == EOF)
+ return EOF;
+ return putchar('\n');
+}
+
+
+/* fgets() */
+static __attribute__((unused))
+char *fgets(char *s, int size, FILE *stream)
+{
+ int ofs;
+ int c;
+
+ for (ofs = 0; ofs + 1 < size;) {
+ c = fgetc(stream);
+ if (c == EOF)
+ break;
+ s[ofs++] = c;
+ if (c == '\n')
+ break;
+ }
+ if (ofs < size)
+ s[ofs] = 0;
+ return ofs ? s : NULL;
+}
+
+
+/* minimal vfprintf(). It supports the following formats:
+ * - %[l*]{d,u,c,x,p}
+ * - %s
+ * - unknown modifiers are ignored.
+ */
+static __attribute__((unused))
+int vfprintf(FILE *stream, const char *fmt, va_list args)
+{
+ char escape, lpref, c;
+ unsigned long long v;
+ unsigned int written;
+ size_t len, ofs;
+ char tmpbuf[21];
+ const char *outstr;
+
+ written = ofs = escape = lpref = 0;
+ while (1) {
+ c = fmt[ofs++];
+
+ if (escape) {
+ /* we're in an escape sequence, ofs == 1 */
+ escape = 0;
+ if (c == 'c' || c == 'd' || c == 'u' || c == 'x' || c == 'p') {
+ char *out = tmpbuf;
+
+ if (c == 'p')
+ v = va_arg(args, unsigned long);
+ else if (lpref) {
+ if (lpref > 1)
+ v = va_arg(args, unsigned long long);
+ else
+ v = va_arg(args, unsigned long);
+ } else
+ v = va_arg(args, unsigned int);
+
+ if (c == 'd') {
+ /* sign-extend the value */
+ if (lpref == 0)
+ v = (long long)(int)v;
+ else if (lpref == 1)
+ v = (long long)(long)v;
+ }
+
+ switch (c) {
+ case 'c':
+ out[0] = v;
+ out[1] = 0;
+ break;
+ case 'd':
+ i64toa_r(v, out);
+ break;
+ case 'u':
+ u64toa_r(v, out);
+ break;
+ case 'p':
+ *(out++) = '0';
+ *(out++) = 'x';
+ /* fall through */
+ default: /* 'x' and 'p' above */
+ u64toh_r(v, out);
+ break;
+ }
+ outstr = tmpbuf;
+ }
+ else if (c == 's') {
+ outstr = va_arg(args, char *);
+ if (!outstr)
+ outstr="(null)";
+ }
+ else if (c == '%') {
+ /* queue it verbatim */
+ continue;
+ }
+ else {
+ /* modifiers or final 0 */
+ if (c == 'l') {
+ /* long format prefix, maintain the escape */
+ lpref++;
+ }
+ escape = 1;
+ goto do_escape;
+ }
+ len = strlen(outstr);
+ goto flush_str;
+ }
+
+ /* not an escape sequence */
+ if (c == 0 || c == '%') {
+ /* flush pending data on escape or end */
+ escape = 1;
+ lpref = 0;
+ outstr = fmt;
+ len = ofs - 1;
+ flush_str:
+ if (_fwrite(outstr, len, stream) != 0)
+ break;
+
+ written += len;
+ do_escape:
+ if (c == 0)
+ break;
+ fmt += ofs;
+ ofs = 0;
+ continue;
+ }
+
+ /* literal char, just queue it */
+ }
+ return written;
+}
+
+static __attribute__((unused, format(printf, 2, 3)))
+int fprintf(FILE *stream, const char *fmt, ...)
+{
+ va_list args;
+ int ret;
+
+ va_start(args, fmt);
+ ret = vfprintf(stream, fmt, args);
+ va_end(args);
+ return ret;
+}
+
+static __attribute__((unused, format(printf, 1, 2)))
+int printf(const char *fmt, ...)
+{
+ va_list args;
+ int ret;
+
+ va_start(args, fmt);
+ ret = vfprintf(stdout, fmt, args);
+ va_end(args);
+ return ret;
+}
+
+static __attribute__((unused))
+void perror(const char *msg)
+{
+ fprintf(stderr, "%s%serrno=%d\n", (msg && *msg) ? msg : "", (msg && *msg) ? ": " : "", errno);
+}
+
+/* make sure to include all global symbols */
+#include "nolibc.h"
+
+#endif /* _NOLIBC_STDIO_H */
diff --git a/tools/include/nolibc/stdlib.h b/tools/include/nolibc/stdlib.h
new file mode 100644
index 000000000..a24000d1e
--- /dev/null
+++ b/tools/include/nolibc/stdlib.h
@@ -0,0 +1,425 @@
+/* SPDX-License-Identifier: LGPL-2.1 OR MIT */
+/*
+ * stdlib function definitions for NOLIBC
+ * Copyright (C) 2017-2021 Willy Tarreau <w@1wt.eu>
+ */
+
+#ifndef _NOLIBC_STDLIB_H
+#define _NOLIBC_STDLIB_H
+
+#include "std.h"
+#include "arch.h"
+#include "types.h"
+#include "sys.h"
+#include "string.h"
+
+struct nolibc_heap {
+ size_t len;
+ char user_p[] __attribute__((__aligned__));
+};
+
+/* Buffer used to store int-to-ASCII conversions. Will only be implemented if
+ * any of the related functions is implemented. The area is large enough to
+ * store "18446744073709551615" or "-9223372036854775808" and the final zero.
+ */
+static __attribute__((unused)) char itoa_buffer[21];
+
+/*
+ * As much as possible, please keep functions alphabetically sorted.
+ */
+
+/* must be exported, as it's used by libgcc for various divide functions */
+__attribute__((weak,unused,noreturn,section(".text.nolibc_abort")))
+void abort(void)
+{
+ sys_kill(sys_getpid(), SIGABRT);
+ for (;;);
+}
+
+static __attribute__((unused))
+long atol(const char *s)
+{
+ unsigned long ret = 0;
+ unsigned long d;
+ int neg = 0;
+
+ if (*s == '-') {
+ neg = 1;
+ s++;
+ }
+
+ while (1) {
+ d = (*s++) - '0';
+ if (d > 9)
+ break;
+ ret *= 10;
+ ret += d;
+ }
+
+ return neg ? -ret : ret;
+}
+
+static __attribute__((unused))
+int atoi(const char *s)
+{
+ return atol(s);
+}
+
+static __attribute__((unused))
+void free(void *ptr)
+{
+ struct nolibc_heap *heap;
+
+ if (!ptr)
+ return;
+
+ heap = container_of(ptr, struct nolibc_heap, user_p);
+ munmap(heap, heap->len);
+}
+
+/* getenv() tries to find the environment variable named <name> in the
+ * environment array pointed to by global variable "environ" which must be
+ * declared as a char **, and must be terminated by a NULL (it is recommended
+ * to set this variable to the "envp" argument of main()). If the requested
+ * environment variable exists its value is returned otherwise NULL is
+ * returned. getenv() is forcefully inlined so that the reference to "environ"
+ * will be dropped if unused, even at -O0.
+ */
+static __attribute__((unused))
+char *_getenv(const char *name, char **environ)
+{
+ int idx, i;
+
+ if (environ) {
+ for (idx = 0; environ[idx]; idx++) {
+ for (i = 0; name[i] && name[i] == environ[idx][i];)
+ i++;
+ if (!name[i] && environ[idx][i] == '=')
+ return &environ[idx][i+1];
+ }
+ }
+ return NULL;
+}
+
+static inline __attribute__((unused,always_inline))
+char *getenv(const char *name)
+{
+ extern char **environ;
+ return _getenv(name, environ);
+}
+
+static __attribute__((unused))
+void *malloc(size_t len)
+{
+ struct nolibc_heap *heap;
+
+ /* Always allocate memory with size multiple of 4096. */
+ len = sizeof(*heap) + len;
+ len = (len + 4095UL) & -4096UL;
+ heap = mmap(NULL, len, PROT_READ|PROT_WRITE, MAP_ANONYMOUS|MAP_PRIVATE,
+ -1, 0);
+ if (__builtin_expect(heap == MAP_FAILED, 0))
+ return NULL;
+
+ heap->len = len;
+ return heap->user_p;
+}
+
+static __attribute__((unused))
+void *calloc(size_t size, size_t nmemb)
+{
+ size_t x = size * nmemb;
+
+ if (__builtin_expect(size && ((x / size) != nmemb), 0)) {
+ SET_ERRNO(ENOMEM);
+ return NULL;
+ }
+
+ /*
+ * No need to zero the heap, the MAP_ANONYMOUS in malloc()
+ * already does it.
+ */
+ return malloc(x);
+}
+
+static __attribute__((unused))
+void *realloc(void *old_ptr, size_t new_size)
+{
+ struct nolibc_heap *heap;
+ size_t user_p_len;
+ void *ret;
+
+ if (!old_ptr)
+ return malloc(new_size);
+
+ heap = container_of(old_ptr, struct nolibc_heap, user_p);
+ user_p_len = heap->len - sizeof(*heap);
+ /*
+ * Don't realloc() if @user_p_len >= @new_size, this block of
+ * memory is still enough to handle the @new_size. Just return
+ * the same pointer.
+ */
+ if (user_p_len >= new_size)
+ return old_ptr;
+
+ ret = malloc(new_size);
+ if (__builtin_expect(!ret, 0))
+ return NULL;
+
+ memcpy(ret, heap->user_p, heap->len);
+ munmap(heap, heap->len);
+ return ret;
+}
+
+/* Converts the unsigned long integer <in> to its hex representation into
+ * buffer <buffer>, which must be long enough to store the number and the
+ * trailing zero (17 bytes for "ffffffffffffffff" or 9 for "ffffffff"). The
+ * buffer is filled from the first byte, and the number of characters emitted
+ * (not counting the trailing zero) is returned. The function is constructed
+ * in a way to optimize the code size and avoid any divide that could add a
+ * dependency on large external functions.
+ */
+static __attribute__((unused))
+int utoh_r(unsigned long in, char *buffer)
+{
+ signed char pos = (~0UL > 0xfffffffful) ? 60 : 28;
+ int digits = 0;
+ int dig;
+
+ do {
+ dig = in >> pos;
+ in -= (uint64_t)dig << pos;
+ pos -= 4;
+ if (dig || digits || pos < 0) {
+ if (dig > 9)
+ dig += 'a' - '0' - 10;
+ buffer[digits++] = '0' + dig;
+ }
+ } while (pos >= 0);
+
+ buffer[digits] = 0;
+ return digits;
+}
+
+/* converts unsigned long <in> to an hex string using the static itoa_buffer
+ * and returns the pointer to that string.
+ */
+static inline __attribute__((unused))
+char *utoh(unsigned long in)
+{
+ utoh_r(in, itoa_buffer);
+ return itoa_buffer;
+}
+
+/* Converts the unsigned long integer <in> to its string representation into
+ * buffer <buffer>, which must be long enough to store the number and the
+ * trailing zero (21 bytes for 18446744073709551615 in 64-bit, 11 for
+ * 4294967295 in 32-bit). The buffer is filled from the first byte, and the
+ * number of characters emitted (not counting the trailing zero) is returned.
+ * The function is constructed in a way to optimize the code size and avoid
+ * any divide that could add a dependency on large external functions.
+ */
+static __attribute__((unused))
+int utoa_r(unsigned long in, char *buffer)
+{
+ unsigned long lim;
+ int digits = 0;
+ int pos = (~0UL > 0xfffffffful) ? 19 : 9;
+ int dig;
+
+ do {
+ for (dig = 0, lim = 1; dig < pos; dig++)
+ lim *= 10;
+
+ if (digits || in >= lim || !pos) {
+ for (dig = 0; in >= lim; dig++)
+ in -= lim;
+ buffer[digits++] = '0' + dig;
+ }
+ } while (pos--);
+
+ buffer[digits] = 0;
+ return digits;
+}
+
+/* Converts the signed long integer <in> to its string representation into
+ * buffer <buffer>, which must be long enough to store the number and the
+ * trailing zero (21 bytes for -9223372036854775808 in 64-bit, 12 for
+ * -2147483648 in 32-bit). The buffer is filled from the first byte, and the
+ * number of characters emitted (not counting the trailing zero) is returned.
+ */
+static __attribute__((unused))
+int itoa_r(long in, char *buffer)
+{
+ char *ptr = buffer;
+ int len = 0;
+
+ if (in < 0) {
+ in = -in;
+ *(ptr++) = '-';
+ len++;
+ }
+ len += utoa_r(in, ptr);
+ return len;
+}
+
+/* for historical compatibility, same as above but returns the pointer to the
+ * buffer.
+ */
+static inline __attribute__((unused))
+char *ltoa_r(long in, char *buffer)
+{
+ itoa_r(in, buffer);
+ return buffer;
+}
+
+/* converts long integer <in> to a string using the static itoa_buffer and
+ * returns the pointer to that string.
+ */
+static inline __attribute__((unused))
+char *itoa(long in)
+{
+ itoa_r(in, itoa_buffer);
+ return itoa_buffer;
+}
+
+/* converts long integer <in> to a string using the static itoa_buffer and
+ * returns the pointer to that string. Same as above, for compatibility.
+ */
+static inline __attribute__((unused))
+char *ltoa(long in)
+{
+ itoa_r(in, itoa_buffer);
+ return itoa_buffer;
+}
+
+/* converts unsigned long integer <in> to a string using the static itoa_buffer
+ * and returns the pointer to that string.
+ */
+static inline __attribute__((unused))
+char *utoa(unsigned long in)
+{
+ utoa_r(in, itoa_buffer);
+ return itoa_buffer;
+}
+
+/* Converts the unsigned 64-bit integer <in> to its hex representation into
+ * buffer <buffer>, which must be long enough to store the number and the
+ * trailing zero (17 bytes for "ffffffffffffffff"). The buffer is filled from
+ * the first byte, and the number of characters emitted (not counting the
+ * trailing zero) is returned. The function is constructed in a way to optimize
+ * the code size and avoid any divide that could add a dependency on large
+ * external functions.
+ */
+static __attribute__((unused))
+int u64toh_r(uint64_t in, char *buffer)
+{
+ signed char pos = 60;
+ int digits = 0;
+ int dig;
+
+ do {
+ if (sizeof(long) >= 8) {
+ dig = (in >> pos) & 0xF;
+ } else {
+ /* 32-bit platforms: avoid a 64-bit shift */
+ uint32_t d = (pos >= 32) ? (in >> 32) : in;
+ dig = (d >> (pos & 31)) & 0xF;
+ }
+ if (dig > 9)
+ dig += 'a' - '0' - 10;
+ pos -= 4;
+ if (dig || digits || pos < 0)
+ buffer[digits++] = '0' + dig;
+ } while (pos >= 0);
+
+ buffer[digits] = 0;
+ return digits;
+}
+
+/* converts uint64_t <in> to an hex string using the static itoa_buffer and
+ * returns the pointer to that string.
+ */
+static inline __attribute__((unused))
+char *u64toh(uint64_t in)
+{
+ u64toh_r(in, itoa_buffer);
+ return itoa_buffer;
+}
+
+/* Converts the unsigned 64-bit integer <in> to its string representation into
+ * buffer <buffer>, which must be long enough to store the number and the
+ * trailing zero (21 bytes for 18446744073709551615). The buffer is filled from
+ * the first byte, and the number of characters emitted (not counting the
+ * trailing zero) is returned. The function is constructed in a way to optimize
+ * the code size and avoid any divide that could add a dependency on large
+ * external functions.
+ */
+static __attribute__((unused))
+int u64toa_r(uint64_t in, char *buffer)
+{
+ unsigned long long lim;
+ int digits = 0;
+ int pos = 19; /* start with the highest possible digit */
+ int dig;
+
+ do {
+ for (dig = 0, lim = 1; dig < pos; dig++)
+ lim *= 10;
+
+ if (digits || in >= lim || !pos) {
+ for (dig = 0; in >= lim; dig++)
+ in -= lim;
+ buffer[digits++] = '0' + dig;
+ }
+ } while (pos--);
+
+ buffer[digits] = 0;
+ return digits;
+}
+
+/* Converts the signed 64-bit integer <in> to its string representation into
+ * buffer <buffer>, which must be long enough to store the number and the
+ * trailing zero (21 bytes for -9223372036854775808). The buffer is filled from
+ * the first byte, and the number of characters emitted (not counting the
+ * trailing zero) is returned.
+ */
+static __attribute__((unused))
+int i64toa_r(int64_t in, char *buffer)
+{
+ char *ptr = buffer;
+ int len = 0;
+
+ if (in < 0) {
+ in = -in;
+ *(ptr++) = '-';
+ len++;
+ }
+ len += u64toa_r(in, ptr);
+ return len;
+}
+
+/* converts int64_t <in> to a string using the static itoa_buffer and returns
+ * the pointer to that string.
+ */
+static inline __attribute__((unused))
+char *i64toa(int64_t in)
+{
+ i64toa_r(in, itoa_buffer);
+ return itoa_buffer;
+}
+
+/* converts uint64_t <in> to a string using the static itoa_buffer and returns
+ * the pointer to that string.
+ */
+static inline __attribute__((unused))
+char *u64toa(uint64_t in)
+{
+ u64toa_r(in, itoa_buffer);
+ return itoa_buffer;
+}
+
+/* make sure to include all global symbols */
+#include "nolibc.h"
+
+#endif /* _NOLIBC_STDLIB_H */
diff --git a/tools/include/nolibc/string.h b/tools/include/nolibc/string.h
new file mode 100644
index 000000000..fffdaf6ff
--- /dev/null
+++ b/tools/include/nolibc/string.h
@@ -0,0 +1,294 @@
+/* SPDX-License-Identifier: LGPL-2.1 OR MIT */
+/*
+ * string function definitions for NOLIBC
+ * Copyright (C) 2017-2021 Willy Tarreau <w@1wt.eu>
+ */
+
+#ifndef _NOLIBC_STRING_H
+#define _NOLIBC_STRING_H
+
+#include "std.h"
+
+static void *malloc(size_t len);
+
+/*
+ * As much as possible, please keep functions alphabetically sorted.
+ */
+
+static __attribute__((unused))
+int memcmp(const void *s1, const void *s2, size_t n)
+{
+ size_t ofs = 0;
+ int c1 = 0;
+
+ while (ofs < n && !(c1 = ((unsigned char *)s1)[ofs] - ((unsigned char *)s2)[ofs])) {
+ ofs++;
+ }
+ return c1;
+}
+
+static __attribute__((unused))
+void *_nolibc_memcpy_up(void *dst, const void *src, size_t len)
+{
+ size_t pos = 0;
+
+ while (pos < len) {
+ ((char *)dst)[pos] = ((const char *)src)[pos];
+ pos++;
+ }
+ return dst;
+}
+
+static __attribute__((unused))
+void *_nolibc_memcpy_down(void *dst, const void *src, size_t len)
+{
+ while (len) {
+ len--;
+ ((char *)dst)[len] = ((const char *)src)[len];
+ }
+ return dst;
+}
+
+/* might be ignored by the compiler without -ffreestanding, then found as
+ * missing.
+ */
+__attribute__((weak,unused,section(".text.nolibc_memmove")))
+void *memmove(void *dst, const void *src, size_t len)
+{
+ size_t dir, pos;
+
+ pos = len;
+ dir = -1;
+
+ if (dst < src) {
+ pos = -1;
+ dir = 1;
+ }
+
+ while (len) {
+ pos += dir;
+ ((char *)dst)[pos] = ((const char *)src)[pos];
+ len--;
+ }
+ return dst;
+}
+
+/* must be exported, as it's used by libgcc on ARM */
+__attribute__((weak,unused,section(".text.nolibc_memcpy")))
+void *memcpy(void *dst, const void *src, size_t len)
+{
+ return _nolibc_memcpy_up(dst, src, len);
+}
+
+/* might be ignored by the compiler without -ffreestanding, then found as
+ * missing.
+ */
+__attribute__((weak,unused,section(".text.nolibc_memset")))
+void *memset(void *dst, int b, size_t len)
+{
+ char *p = dst;
+
+ while (len--) {
+ /* prevent gcc from recognizing memset() here */
+ asm volatile("");
+ *(p++) = b;
+ }
+ return dst;
+}
+
+static __attribute__((unused))
+char *strchr(const char *s, int c)
+{
+ while (*s) {
+ if (*s == (char)c)
+ return (char *)s;
+ s++;
+ }
+ return NULL;
+}
+
+static __attribute__((unused))
+int strcmp(const char *a, const char *b)
+{
+ unsigned int c;
+ int diff;
+
+ while (!(diff = (unsigned char)*a++ - (c = (unsigned char)*b++)) && c)
+ ;
+ return diff;
+}
+
+static __attribute__((unused))
+char *strcpy(char *dst, const char *src)
+{
+ char *ret = dst;
+
+ while ((*dst++ = *src++));
+ return ret;
+}
+
+/* this function is only used with arguments that are not constants or when
+ * it's not known because optimizations are disabled. Note that gcc 12
+ * recognizes an strlen() pattern and replaces it with a jump to strlen(),
+ * thus itself, hence the asm() statement below that's meant to disable this
+ * confusing practice.
+ */
+static __attribute__((unused))
+size_t strlen(const char *str)
+{
+ size_t len;
+
+ for (len = 0; str[len]; len++)
+ asm("");
+ return len;
+}
+
+/* do not trust __builtin_constant_p() at -O0, as clang will emit a test and
+ * the two branches, then will rely on an external definition of strlen().
+ */
+#if defined(__OPTIMIZE__)
+#define nolibc_strlen(x) strlen(x)
+#define strlen(str) ({ \
+ __builtin_constant_p((str)) ? \
+ __builtin_strlen((str)) : \
+ nolibc_strlen((str)); \
+})
+#endif
+
+static __attribute__((unused))
+size_t strnlen(const char *str, size_t maxlen)
+{
+ size_t len;
+
+ for (len = 0; (len < maxlen) && str[len]; len++);
+ return len;
+}
+
+static __attribute__((unused))
+char *strdup(const char *str)
+{
+ size_t len;
+ char *ret;
+
+ len = strlen(str);
+ ret = malloc(len + 1);
+ if (__builtin_expect(ret != NULL, 1))
+ memcpy(ret, str, len + 1);
+
+ return ret;
+}
+
+static __attribute__((unused))
+char *strndup(const char *str, size_t maxlen)
+{
+ size_t len;
+ char *ret;
+
+ len = strnlen(str, maxlen);
+ ret = malloc(len + 1);
+ if (__builtin_expect(ret != NULL, 1)) {
+ memcpy(ret, str, len);
+ ret[len] = '\0';
+ }
+
+ return ret;
+}
+
+static __attribute__((unused))
+size_t strlcat(char *dst, const char *src, size_t size)
+{
+ size_t len;
+ char c;
+
+ for (len = 0; dst[len]; len++)
+ ;
+
+ for (;;) {
+ c = *src;
+ if (len < size)
+ dst[len] = c;
+ if (!c)
+ break;
+ len++;
+ src++;
+ }
+
+ return len;
+}
+
+static __attribute__((unused))
+size_t strlcpy(char *dst, const char *src, size_t size)
+{
+ size_t len;
+ char c;
+
+ for (len = 0;;) {
+ c = src[len];
+ if (len < size)
+ dst[len] = c;
+ if (!c)
+ break;
+ len++;
+ }
+ return len;
+}
+
+static __attribute__((unused))
+char *strncat(char *dst, const char *src, size_t size)
+{
+ char *orig = dst;
+
+ while (*dst)
+ dst++;
+
+ while (size && (*dst = *src)) {
+ src++;
+ dst++;
+ size--;
+ }
+
+ *dst = 0;
+ return orig;
+}
+
+static __attribute__((unused))
+int strncmp(const char *a, const char *b, size_t size)
+{
+ unsigned int c;
+ int diff = 0;
+
+ while (size-- &&
+ !(diff = (unsigned char)*a++ - (c = (unsigned char)*b++)) && c)
+ ;
+
+ return diff;
+}
+
+static __attribute__((unused))
+char *strncpy(char *dst, const char *src, size_t size)
+{
+ size_t len;
+
+ for (len = 0; len < size; len++)
+ if ((dst[len] = *src))
+ src++;
+ return dst;
+}
+
+static __attribute__((unused))
+char *strrchr(const char *s, int c)
+{
+ const char *ret = NULL;
+
+ while (*s) {
+ if (*s == (char)c)
+ ret = s;
+ s++;
+ }
+ return (char *)ret;
+}
+
+/* make sure to include all global symbols */
+#include "nolibc.h"
+
+#endif /* _NOLIBC_STRING_H */
diff --git a/tools/include/nolibc/sys.h b/tools/include/nolibc/sys.h
new file mode 100644
index 000000000..78473d34e
--- /dev/null
+++ b/tools/include/nolibc/sys.h
@@ -0,0 +1,1249 @@
+/* SPDX-License-Identifier: LGPL-2.1 OR MIT */
+/*
+ * Syscall definitions for NOLIBC (those in man(2))
+ * Copyright (C) 2017-2021 Willy Tarreau <w@1wt.eu>
+ */
+
+#ifndef _NOLIBC_SYS_H
+#define _NOLIBC_SYS_H
+
+#include <stdarg.h>
+#include "std.h"
+
+/* system includes */
+#include <asm/unistd.h>
+#include <asm/signal.h> // for SIGCHLD
+#include <asm/ioctls.h>
+#include <asm/mman.h>
+#include <linux/fs.h>
+#include <linux/loop.h>
+#include <linux/time.h>
+
+#include "arch.h"
+#include "errno.h"
+#include "types.h"
+
+
+/* Functions in this file only describe syscalls. They're declared static so
+ * that the compiler usually decides to inline them while still being allowed
+ * to pass a pointer to one of their instances. Each syscall exists in two
+ * versions:
+ * - the "internal" ones, which matches the raw syscall interface at the
+ * kernel level, which may sometimes slightly differ from the documented
+ * libc-level ones. For example most of them return either a valid value
+ * or -errno. All of these are prefixed with "sys_". They may be called
+ * by non-portable applications if desired.
+ *
+ * - the "exported" ones, whose interface must closely match the one
+ * documented in man(2), that applications are supposed to expect. These
+ * ones rely on the internal ones, and set errno.
+ *
+ * Each syscall will be defined with the two functions, sorted in alphabetical
+ * order applied to the exported names.
+ *
+ * In case of doubt about the relevance of a function here, only those which
+ * set errno should be defined here. Wrappers like those appearing in man(3)
+ * should not be placed here.
+ */
+
+
+/*
+ * int brk(void *addr);
+ * void *sbrk(intptr_t inc)
+ */
+
+static __attribute__((unused))
+void *sys_brk(void *addr)
+{
+ return (void *)my_syscall1(__NR_brk, addr);
+}
+
+static __attribute__((unused))
+int brk(void *addr)
+{
+ void *ret = sys_brk(addr);
+
+ if (!ret) {
+ SET_ERRNO(ENOMEM);
+ return -1;
+ }
+ return 0;
+}
+
+static __attribute__((unused))
+void *sbrk(intptr_t inc)
+{
+ void *ret;
+
+ /* first call to find current end */
+ if ((ret = sys_brk(0)) && (sys_brk(ret + inc) == ret + inc))
+ return ret + inc;
+
+ SET_ERRNO(ENOMEM);
+ return (void *)-1;
+}
+
+
+/*
+ * int chdir(const char *path);
+ */
+
+static __attribute__((unused))
+int sys_chdir(const char *path)
+{
+ return my_syscall1(__NR_chdir, path);
+}
+
+static __attribute__((unused))
+int chdir(const char *path)
+{
+ int ret = sys_chdir(path);
+
+ if (ret < 0) {
+ SET_ERRNO(-ret);
+ ret = -1;
+ }
+ return ret;
+}
+
+
+/*
+ * int chmod(const char *path, mode_t mode);
+ */
+
+static __attribute__((unused))
+int sys_chmod(const char *path, mode_t mode)
+{
+#ifdef __NR_fchmodat
+ return my_syscall4(__NR_fchmodat, AT_FDCWD, path, mode, 0);
+#elif defined(__NR_chmod)
+ return my_syscall2(__NR_chmod, path, mode);
+#else
+#error Neither __NR_fchmodat nor __NR_chmod defined, cannot implement sys_chmod()
+#endif
+}
+
+static __attribute__((unused))
+int chmod(const char *path, mode_t mode)
+{
+ int ret = sys_chmod(path, mode);
+
+ if (ret < 0) {
+ SET_ERRNO(-ret);
+ ret = -1;
+ }
+ return ret;
+}
+
+
+/*
+ * int chown(const char *path, uid_t owner, gid_t group);
+ */
+
+static __attribute__((unused))
+int sys_chown(const char *path, uid_t owner, gid_t group)
+{
+#ifdef __NR_fchownat
+ return my_syscall5(__NR_fchownat, AT_FDCWD, path, owner, group, 0);
+#elif defined(__NR_chown)
+ return my_syscall3(__NR_chown, path, owner, group);
+#else
+#error Neither __NR_fchownat nor __NR_chown defined, cannot implement sys_chown()
+#endif
+}
+
+static __attribute__((unused))
+int chown(const char *path, uid_t owner, gid_t group)
+{
+ int ret = sys_chown(path, owner, group);
+
+ if (ret < 0) {
+ SET_ERRNO(-ret);
+ ret = -1;
+ }
+ return ret;
+}
+
+
+/*
+ * int chroot(const char *path);
+ */
+
+static __attribute__((unused))
+int sys_chroot(const char *path)
+{
+ return my_syscall1(__NR_chroot, path);
+}
+
+static __attribute__((unused))
+int chroot(const char *path)
+{
+ int ret = sys_chroot(path);
+
+ if (ret < 0) {
+ SET_ERRNO(-ret);
+ ret = -1;
+ }
+ return ret;
+}
+
+
+/*
+ * int close(int fd);
+ */
+
+static __attribute__((unused))
+int sys_close(int fd)
+{
+ return my_syscall1(__NR_close, fd);
+}
+
+static __attribute__((unused))
+int close(int fd)
+{
+ int ret = sys_close(fd);
+
+ if (ret < 0) {
+ SET_ERRNO(-ret);
+ ret = -1;
+ }
+ return ret;
+}
+
+
+/*
+ * int dup(int fd);
+ */
+
+static __attribute__((unused))
+int sys_dup(int fd)
+{
+ return my_syscall1(__NR_dup, fd);
+}
+
+static __attribute__((unused))
+int dup(int fd)
+{
+ int ret = sys_dup(fd);
+
+ if (ret < 0) {
+ SET_ERRNO(-ret);
+ ret = -1;
+ }
+ return ret;
+}
+
+
+/*
+ * int dup2(int old, int new);
+ */
+
+static __attribute__((unused))
+int sys_dup2(int old, int new)
+{
+#ifdef __NR_dup3
+ return my_syscall3(__NR_dup3, old, new, 0);
+#elif defined(__NR_dup2)
+ return my_syscall2(__NR_dup2, old, new);
+#else
+#error Neither __NR_dup3 nor __NR_dup2 defined, cannot implement sys_dup2()
+#endif
+}
+
+static __attribute__((unused))
+int dup2(int old, int new)
+{
+ int ret = sys_dup2(old, new);
+
+ if (ret < 0) {
+ SET_ERRNO(-ret);
+ ret = -1;
+ }
+ return ret;
+}
+
+
+/*
+ * int dup3(int old, int new, int flags);
+ */
+
+#ifdef __NR_dup3
+static __attribute__((unused))
+int sys_dup3(int old, int new, int flags)
+{
+ return my_syscall3(__NR_dup3, old, new, flags);
+}
+
+static __attribute__((unused))
+int dup3(int old, int new, int flags)
+{
+ int ret = sys_dup3(old, new, flags);
+
+ if (ret < 0) {
+ SET_ERRNO(-ret);
+ ret = -1;
+ }
+ return ret;
+}
+#endif
+
+
+/*
+ * int execve(const char *filename, char *const argv[], char *const envp[]);
+ */
+
+static __attribute__((unused))
+int sys_execve(const char *filename, char *const argv[], char *const envp[])
+{
+ return my_syscall3(__NR_execve, filename, argv, envp);
+}
+
+static __attribute__((unused))
+int execve(const char *filename, char *const argv[], char *const envp[])
+{
+ int ret = sys_execve(filename, argv, envp);
+
+ if (ret < 0) {
+ SET_ERRNO(-ret);
+ ret = -1;
+ }
+ return ret;
+}
+
+
+/*
+ * void exit(int status);
+ */
+
+static __attribute__((noreturn,unused))
+void sys_exit(int status)
+{
+ my_syscall1(__NR_exit, status & 255);
+ while(1); // shut the "noreturn" warnings.
+}
+
+static __attribute__((noreturn,unused))
+void exit(int status)
+{
+ sys_exit(status);
+}
+
+
+/*
+ * pid_t fork(void);
+ */
+
+static __attribute__((unused))
+pid_t sys_fork(void)
+{
+#ifdef __NR_clone
+ /* note: some archs only have clone() and not fork(). Different archs
+ * have a different API, but most archs have the flags on first arg and
+ * will not use the rest with no other flag.
+ */
+ return my_syscall5(__NR_clone, SIGCHLD, 0, 0, 0, 0);
+#elif defined(__NR_fork)
+ return my_syscall0(__NR_fork);
+#else
+#error Neither __NR_clone nor __NR_fork defined, cannot implement sys_fork()
+#endif
+}
+
+static __attribute__((unused))
+pid_t fork(void)
+{
+ pid_t ret = sys_fork();
+
+ if (ret < 0) {
+ SET_ERRNO(-ret);
+ ret = -1;
+ }
+ return ret;
+}
+
+
+/*
+ * int fsync(int fd);
+ */
+
+static __attribute__((unused))
+int sys_fsync(int fd)
+{
+ return my_syscall1(__NR_fsync, fd);
+}
+
+static __attribute__((unused))
+int fsync(int fd)
+{
+ int ret = sys_fsync(fd);
+
+ if (ret < 0) {
+ SET_ERRNO(-ret);
+ ret = -1;
+ }
+ return ret;
+}
+
+
+/*
+ * int getdents64(int fd, struct linux_dirent64 *dirp, int count);
+ */
+
+static __attribute__((unused))
+int sys_getdents64(int fd, struct linux_dirent64 *dirp, int count)
+{
+ return my_syscall3(__NR_getdents64, fd, dirp, count);
+}
+
+static __attribute__((unused))
+int getdents64(int fd, struct linux_dirent64 *dirp, int count)
+{
+ int ret = sys_getdents64(fd, dirp, count);
+
+ if (ret < 0) {
+ SET_ERRNO(-ret);
+ ret = -1;
+ }
+ return ret;
+}
+
+
+/*
+ * pid_t getpgid(pid_t pid);
+ */
+
+static __attribute__((unused))
+pid_t sys_getpgid(pid_t pid)
+{
+ return my_syscall1(__NR_getpgid, pid);
+}
+
+static __attribute__((unused))
+pid_t getpgid(pid_t pid)
+{
+ pid_t ret = sys_getpgid(pid);
+
+ if (ret < 0) {
+ SET_ERRNO(-ret);
+ ret = -1;
+ }
+ return ret;
+}
+
+
+/*
+ * pid_t getpgrp(void);
+ */
+
+static __attribute__((unused))
+pid_t sys_getpgrp(void)
+{
+ return sys_getpgid(0);
+}
+
+static __attribute__((unused))
+pid_t getpgrp(void)
+{
+ return sys_getpgrp();
+}
+
+
+/*
+ * pid_t getpid(void);
+ */
+
+static __attribute__((unused))
+pid_t sys_getpid(void)
+{
+ return my_syscall0(__NR_getpid);
+}
+
+static __attribute__((unused))
+pid_t getpid(void)
+{
+ return sys_getpid();
+}
+
+
+/*
+ * pid_t getppid(void);
+ */
+
+static __attribute__((unused))
+pid_t sys_getppid(void)
+{
+ return my_syscall0(__NR_getppid);
+}
+
+static __attribute__((unused))
+pid_t getppid(void)
+{
+ return sys_getppid();
+}
+
+
+/*
+ * pid_t gettid(void);
+ */
+
+static __attribute__((unused))
+pid_t sys_gettid(void)
+{
+ return my_syscall0(__NR_gettid);
+}
+
+static __attribute__((unused))
+pid_t gettid(void)
+{
+ return sys_gettid();
+}
+
+
+/*
+ * int gettimeofday(struct timeval *tv, struct timezone *tz);
+ */
+
+static __attribute__((unused))
+int sys_gettimeofday(struct timeval *tv, struct timezone *tz)
+{
+ return my_syscall2(__NR_gettimeofday, tv, tz);
+}
+
+static __attribute__((unused))
+int gettimeofday(struct timeval *tv, struct timezone *tz)
+{
+ int ret = sys_gettimeofday(tv, tz);
+
+ if (ret < 0) {
+ SET_ERRNO(-ret);
+ ret = -1;
+ }
+ return ret;
+}
+
+
+/*
+ * int ioctl(int fd, unsigned long req, void *value);
+ */
+
+static __attribute__((unused))
+int sys_ioctl(int fd, unsigned long req, void *value)
+{
+ return my_syscall3(__NR_ioctl, fd, req, value);
+}
+
+static __attribute__((unused))
+int ioctl(int fd, unsigned long req, void *value)
+{
+ int ret = sys_ioctl(fd, req, value);
+
+ if (ret < 0) {
+ SET_ERRNO(-ret);
+ ret = -1;
+ }
+ return ret;
+}
+
+/*
+ * int kill(pid_t pid, int signal);
+ */
+
+static __attribute__((unused))
+int sys_kill(pid_t pid, int signal)
+{
+ return my_syscall2(__NR_kill, pid, signal);
+}
+
+static __attribute__((unused))
+int kill(pid_t pid, int signal)
+{
+ int ret = sys_kill(pid, signal);
+
+ if (ret < 0) {
+ SET_ERRNO(-ret);
+ ret = -1;
+ }
+ return ret;
+}
+
+
+/*
+ * int link(const char *old, const char *new);
+ */
+
+static __attribute__((unused))
+int sys_link(const char *old, const char *new)
+{
+#ifdef __NR_linkat
+ return my_syscall5(__NR_linkat, AT_FDCWD, old, AT_FDCWD, new, 0);
+#elif defined(__NR_link)
+ return my_syscall2(__NR_link, old, new);
+#else
+#error Neither __NR_linkat nor __NR_link defined, cannot implement sys_link()
+#endif
+}
+
+static __attribute__((unused))
+int link(const char *old, const char *new)
+{
+ int ret = sys_link(old, new);
+
+ if (ret < 0) {
+ SET_ERRNO(-ret);
+ ret = -1;
+ }
+ return ret;
+}
+
+
+/*
+ * off_t lseek(int fd, off_t offset, int whence);
+ */
+
+static __attribute__((unused))
+off_t sys_lseek(int fd, off_t offset, int whence)
+{
+ return my_syscall3(__NR_lseek, fd, offset, whence);
+}
+
+static __attribute__((unused))
+off_t lseek(int fd, off_t offset, int whence)
+{
+ off_t ret = sys_lseek(fd, offset, whence);
+
+ if (ret < 0) {
+ SET_ERRNO(-ret);
+ ret = -1;
+ }
+ return ret;
+}
+
+
+/*
+ * int mkdir(const char *path, mode_t mode);
+ */
+
+static __attribute__((unused))
+int sys_mkdir(const char *path, mode_t mode)
+{
+#ifdef __NR_mkdirat
+ return my_syscall3(__NR_mkdirat, AT_FDCWD, path, mode);
+#elif defined(__NR_mkdir)
+ return my_syscall2(__NR_mkdir, path, mode);
+#else
+#error Neither __NR_mkdirat nor __NR_mkdir defined, cannot implement sys_mkdir()
+#endif
+}
+
+static __attribute__((unused))
+int mkdir(const char *path, mode_t mode)
+{
+ int ret = sys_mkdir(path, mode);
+
+ if (ret < 0) {
+ SET_ERRNO(-ret);
+ ret = -1;
+ }
+ return ret;
+}
+
+
+/*
+ * int mknod(const char *path, mode_t mode, dev_t dev);
+ */
+
+static __attribute__((unused))
+long sys_mknod(const char *path, mode_t mode, dev_t dev)
+{
+#ifdef __NR_mknodat
+ return my_syscall4(__NR_mknodat, AT_FDCWD, path, mode, dev);
+#elif defined(__NR_mknod)
+ return my_syscall3(__NR_mknod, path, mode, dev);
+#else
+#error Neither __NR_mknodat nor __NR_mknod defined, cannot implement sys_mknod()
+#endif
+}
+
+static __attribute__((unused))
+int mknod(const char *path, mode_t mode, dev_t dev)
+{
+ int ret = sys_mknod(path, mode, dev);
+
+ if (ret < 0) {
+ SET_ERRNO(-ret);
+ ret = -1;
+ }
+ return ret;
+}
+
+#ifndef MAP_SHARED
+#define MAP_SHARED 0x01 /* Share changes */
+#define MAP_PRIVATE 0x02 /* Changes are private */
+#define MAP_SHARED_VALIDATE 0x03 /* share + validate extension flags */
+#endif
+
+#ifndef MAP_FAILED
+#define MAP_FAILED ((void *)-1)
+#endif
+
+static __attribute__((unused))
+void *sys_mmap(void *addr, size_t length, int prot, int flags, int fd,
+ off_t offset)
+{
+#ifndef my_syscall6
+ /* Function not implemented. */
+ return (void *)-ENOSYS;
+#else
+
+ int n;
+
+#if defined(__NR_mmap2)
+ n = __NR_mmap2;
+ offset >>= 12;
+#else
+ n = __NR_mmap;
+#endif
+
+ return (void *)my_syscall6(n, addr, length, prot, flags, fd, offset);
+#endif
+}
+
+static __attribute__((unused))
+void *mmap(void *addr, size_t length, int prot, int flags, int fd, off_t offset)
+{
+ void *ret = sys_mmap(addr, length, prot, flags, fd, offset);
+
+ if ((unsigned long)ret >= -4095UL) {
+ SET_ERRNO(-(long)ret);
+ ret = MAP_FAILED;
+ }
+ return ret;
+}
+
+static __attribute__((unused))
+int sys_munmap(void *addr, size_t length)
+{
+ return my_syscall2(__NR_munmap, addr, length);
+}
+
+static __attribute__((unused))
+int munmap(void *addr, size_t length)
+{
+ int ret = sys_munmap(addr, length);
+
+ if (ret < 0) {
+ SET_ERRNO(-ret);
+ ret = -1;
+ }
+ return ret;
+}
+
+/*
+ * int mount(const char *source, const char *target,
+ * const char *fstype, unsigned long flags,
+ * const void *data);
+ */
+static __attribute__((unused))
+int sys_mount(const char *src, const char *tgt, const char *fst,
+ unsigned long flags, const void *data)
+{
+ return my_syscall5(__NR_mount, src, tgt, fst, flags, data);
+}
+
+static __attribute__((unused))
+int mount(const char *src, const char *tgt,
+ const char *fst, unsigned long flags,
+ const void *data)
+{
+ int ret = sys_mount(src, tgt, fst, flags, data);
+
+ if (ret < 0) {
+ SET_ERRNO(-ret);
+ ret = -1;
+ }
+ return ret;
+}
+
+
+/*
+ * int open(const char *path, int flags[, mode_t mode]);
+ */
+
+static __attribute__((unused))
+int sys_open(const char *path, int flags, mode_t mode)
+{
+#ifdef __NR_openat
+ return my_syscall4(__NR_openat, AT_FDCWD, path, flags, mode);
+#elif defined(__NR_open)
+ return my_syscall3(__NR_open, path, flags, mode);
+#else
+#error Neither __NR_openat nor __NR_open defined, cannot implement sys_open()
+#endif
+}
+
+static __attribute__((unused))
+int open(const char *path, int flags, ...)
+{
+ mode_t mode = 0;
+ int ret;
+
+ if (flags & O_CREAT) {
+ va_list args;
+
+ va_start(args, flags);
+ mode = va_arg(args, mode_t);
+ va_end(args);
+ }
+
+ ret = sys_open(path, flags, mode);
+
+ if (ret < 0) {
+ SET_ERRNO(-ret);
+ ret = -1;
+ }
+ return ret;
+}
+
+
+/*
+ * int pivot_root(const char *new, const char *old);
+ */
+
+static __attribute__((unused))
+int sys_pivot_root(const char *new, const char *old)
+{
+ return my_syscall2(__NR_pivot_root, new, old);
+}
+
+static __attribute__((unused))
+int pivot_root(const char *new, const char *old)
+{
+ int ret = sys_pivot_root(new, old);
+
+ if (ret < 0) {
+ SET_ERRNO(-ret);
+ ret = -1;
+ }
+ return ret;
+}
+
+
+/*
+ * int poll(struct pollfd *fds, int nfds, int timeout);
+ */
+
+static __attribute__((unused))
+int sys_poll(struct pollfd *fds, int nfds, int timeout)
+{
+#if defined(__NR_ppoll)
+ struct timespec t;
+
+ if (timeout >= 0) {
+ t.tv_sec = timeout / 1000;
+ t.tv_nsec = (timeout % 1000) * 1000000;
+ }
+ return my_syscall4(__NR_ppoll, fds, nfds, (timeout >= 0) ? &t : NULL, NULL);
+#elif defined(__NR_poll)
+ return my_syscall3(__NR_poll, fds, nfds, timeout);
+#else
+#error Neither __NR_ppoll nor __NR_poll defined, cannot implement sys_poll()
+#endif
+}
+
+static __attribute__((unused))
+int poll(struct pollfd *fds, int nfds, int timeout)
+{
+ int ret = sys_poll(fds, nfds, timeout);
+
+ if (ret < 0) {
+ SET_ERRNO(-ret);
+ ret = -1;
+ }
+ return ret;
+}
+
+
+/*
+ * ssize_t read(int fd, void *buf, size_t count);
+ */
+
+static __attribute__((unused))
+ssize_t sys_read(int fd, void *buf, size_t count)
+{
+ return my_syscall3(__NR_read, fd, buf, count);
+}
+
+static __attribute__((unused))
+ssize_t read(int fd, void *buf, size_t count)
+{
+ ssize_t ret = sys_read(fd, buf, count);
+
+ if (ret < 0) {
+ SET_ERRNO(-ret);
+ ret = -1;
+ }
+ return ret;
+}
+
+
+/*
+ * int reboot(int cmd);
+ * <cmd> is among LINUX_REBOOT_CMD_*
+ */
+
+static __attribute__((unused))
+ssize_t sys_reboot(int magic1, int magic2, int cmd, void *arg)
+{
+ return my_syscall4(__NR_reboot, magic1, magic2, cmd, arg);
+}
+
+static __attribute__((unused))
+int reboot(int cmd)
+{
+ int ret = sys_reboot(LINUX_REBOOT_MAGIC1, LINUX_REBOOT_MAGIC2, cmd, 0);
+
+ if (ret < 0) {
+ SET_ERRNO(-ret);
+ ret = -1;
+ }
+ return ret;
+}
+
+
+/*
+ * int sched_yield(void);
+ */
+
+static __attribute__((unused))
+int sys_sched_yield(void)
+{
+ return my_syscall0(__NR_sched_yield);
+}
+
+static __attribute__((unused))
+int sched_yield(void)
+{
+ int ret = sys_sched_yield();
+
+ if (ret < 0) {
+ SET_ERRNO(-ret);
+ ret = -1;
+ }
+ return ret;
+}
+
+
+/*
+ * int select(int nfds, fd_set *read_fds, fd_set *write_fds,
+ * fd_set *except_fds, struct timeval *timeout);
+ */
+
+static __attribute__((unused))
+int sys_select(int nfds, fd_set *rfds, fd_set *wfds, fd_set *efds, struct timeval *timeout)
+{
+#if defined(__ARCH_WANT_SYS_OLD_SELECT) && !defined(__NR__newselect)
+ struct sel_arg_struct {
+ unsigned long n;
+ fd_set *r, *w, *e;
+ struct timeval *t;
+ } arg = { .n = nfds, .r = rfds, .w = wfds, .e = efds, .t = timeout };
+ return my_syscall1(__NR_select, &arg);
+#elif defined(__ARCH_WANT_SYS_PSELECT6) && defined(__NR_pselect6)
+ struct timespec t;
+
+ if (timeout) {
+ t.tv_sec = timeout->tv_sec;
+ t.tv_nsec = timeout->tv_usec * 1000;
+ }
+ return my_syscall6(__NR_pselect6, nfds, rfds, wfds, efds, timeout ? &t : NULL, NULL);
+#elif defined(__NR__newselect) || defined(__NR_select)
+#ifndef __NR__newselect
+#define __NR__newselect __NR_select
+#endif
+ return my_syscall5(__NR__newselect, nfds, rfds, wfds, efds, timeout);
+#else
+#error None of __NR_select, __NR_pselect6, nor __NR__newselect defined, cannot implement sys_select()
+#endif
+}
+
+static __attribute__((unused))
+int select(int nfds, fd_set *rfds, fd_set *wfds, fd_set *efds, struct timeval *timeout)
+{
+ int ret = sys_select(nfds, rfds, wfds, efds, timeout);
+
+ if (ret < 0) {
+ SET_ERRNO(-ret);
+ ret = -1;
+ }
+ return ret;
+}
+
+
+/*
+ * int setpgid(pid_t pid, pid_t pgid);
+ */
+
+static __attribute__((unused))
+int sys_setpgid(pid_t pid, pid_t pgid)
+{
+ return my_syscall2(__NR_setpgid, pid, pgid);
+}
+
+static __attribute__((unused))
+int setpgid(pid_t pid, pid_t pgid)
+{
+ int ret = sys_setpgid(pid, pgid);
+
+ if (ret < 0) {
+ SET_ERRNO(-ret);
+ ret = -1;
+ }
+ return ret;
+}
+
+
+/*
+ * pid_t setsid(void);
+ */
+
+static __attribute__((unused))
+pid_t sys_setsid(void)
+{
+ return my_syscall0(__NR_setsid);
+}
+
+static __attribute__((unused))
+pid_t setsid(void)
+{
+ pid_t ret = sys_setsid();
+
+ if (ret < 0) {
+ SET_ERRNO(-ret);
+ ret = -1;
+ }
+ return ret;
+}
+
+
+/*
+ * int stat(const char *path, struct stat *buf);
+ * Warning: the struct stat's layout is arch-dependent.
+ */
+
+static __attribute__((unused))
+int sys_stat(const char *path, struct stat *buf)
+{
+ struct sys_stat_struct stat;
+ long ret;
+
+#ifdef __NR_newfstatat
+ /* only solution for arm64 */
+ ret = my_syscall4(__NR_newfstatat, AT_FDCWD, path, &stat, 0);
+#elif defined(__NR_stat)
+ ret = my_syscall2(__NR_stat, path, &stat);
+#else
+#error Neither __NR_newfstatat nor __NR_stat defined, cannot implement sys_stat()
+#endif
+ buf->st_dev = stat.st_dev;
+ buf->st_ino = stat.st_ino;
+ buf->st_mode = stat.st_mode;
+ buf->st_nlink = stat.st_nlink;
+ buf->st_uid = stat.st_uid;
+ buf->st_gid = stat.st_gid;
+ buf->st_rdev = stat.st_rdev;
+ buf->st_size = stat.st_size;
+ buf->st_blksize = stat.st_blksize;
+ buf->st_blocks = stat.st_blocks;
+ buf->st_atime = stat.st_atime;
+ buf->st_mtime = stat.st_mtime;
+ buf->st_ctime = stat.st_ctime;
+ return ret;
+}
+
+static __attribute__((unused))
+int stat(const char *path, struct stat *buf)
+{
+ int ret = sys_stat(path, buf);
+
+ if (ret < 0) {
+ SET_ERRNO(-ret);
+ ret = -1;
+ }
+ return ret;
+}
+
+
+/*
+ * int symlink(const char *old, const char *new);
+ */
+
+static __attribute__((unused))
+int sys_symlink(const char *old, const char *new)
+{
+#ifdef __NR_symlinkat
+ return my_syscall3(__NR_symlinkat, old, AT_FDCWD, new);
+#elif defined(__NR_symlink)
+ return my_syscall2(__NR_symlink, old, new);
+#else
+#error Neither __NR_symlinkat nor __NR_symlink defined, cannot implement sys_symlink()
+#endif
+}
+
+static __attribute__((unused))
+int symlink(const char *old, const char *new)
+{
+ int ret = sys_symlink(old, new);
+
+ if (ret < 0) {
+ SET_ERRNO(-ret);
+ ret = -1;
+ }
+ return ret;
+}
+
+
+/*
+ * mode_t umask(mode_t mode);
+ */
+
+static __attribute__((unused))
+mode_t sys_umask(mode_t mode)
+{
+ return my_syscall1(__NR_umask, mode);
+}
+
+static __attribute__((unused))
+mode_t umask(mode_t mode)
+{
+ return sys_umask(mode);
+}
+
+
+/*
+ * int umount2(const char *path, int flags);
+ */
+
+static __attribute__((unused))
+int sys_umount2(const char *path, int flags)
+{
+ return my_syscall2(__NR_umount2, path, flags);
+}
+
+static __attribute__((unused))
+int umount2(const char *path, int flags)
+{
+ int ret = sys_umount2(path, flags);
+
+ if (ret < 0) {
+ SET_ERRNO(-ret);
+ ret = -1;
+ }
+ return ret;
+}
+
+
+/*
+ * int unlink(const char *path);
+ */
+
+static __attribute__((unused))
+int sys_unlink(const char *path)
+{
+#ifdef __NR_unlinkat
+ return my_syscall3(__NR_unlinkat, AT_FDCWD, path, 0);
+#elif defined(__NR_unlink)
+ return my_syscall1(__NR_unlink, path);
+#else
+#error Neither __NR_unlinkat nor __NR_unlink defined, cannot implement sys_unlink()
+#endif
+}
+
+static __attribute__((unused))
+int unlink(const char *path)
+{
+ int ret = sys_unlink(path);
+
+ if (ret < 0) {
+ SET_ERRNO(-ret);
+ ret = -1;
+ }
+ return ret;
+}
+
+
+/*
+ * pid_t wait(int *status);
+ * pid_t wait4(pid_t pid, int *status, int options, struct rusage *rusage);
+ * pid_t waitpid(pid_t pid, int *status, int options);
+ */
+
+static __attribute__((unused))
+pid_t sys_wait4(pid_t pid, int *status, int options, struct rusage *rusage)
+{
+ return my_syscall4(__NR_wait4, pid, status, options, rusage);
+}
+
+static __attribute__((unused))
+pid_t wait(int *status)
+{
+ pid_t ret = sys_wait4(-1, status, 0, NULL);
+
+ if (ret < 0) {
+ SET_ERRNO(-ret);
+ ret = -1;
+ }
+ return ret;
+}
+
+static __attribute__((unused))
+pid_t wait4(pid_t pid, int *status, int options, struct rusage *rusage)
+{
+ pid_t ret = sys_wait4(pid, status, options, rusage);
+
+ if (ret < 0) {
+ SET_ERRNO(-ret);
+ ret = -1;
+ }
+ return ret;
+}
+
+
+static __attribute__((unused))
+pid_t waitpid(pid_t pid, int *status, int options)
+{
+ pid_t ret = sys_wait4(pid, status, options, NULL);
+
+ if (ret < 0) {
+ SET_ERRNO(-ret);
+ ret = -1;
+ }
+ return ret;
+}
+
+
+/*
+ * ssize_t write(int fd, const void *buf, size_t count);
+ */
+
+static __attribute__((unused))
+ssize_t sys_write(int fd, const void *buf, size_t count)
+{
+ return my_syscall3(__NR_write, fd, buf, count);
+}
+
+static __attribute__((unused))
+ssize_t write(int fd, const void *buf, size_t count)
+{
+ ssize_t ret = sys_write(fd, buf, count);
+
+ if (ret < 0) {
+ SET_ERRNO(-ret);
+ ret = -1;
+ }
+ return ret;
+}
+
+/* make sure to include all global symbols */
+#include "nolibc.h"
+
+#endif /* _NOLIBC_SYS_H */
diff --git a/tools/include/nolibc/time.h b/tools/include/nolibc/time.h
new file mode 100644
index 000000000..84655361b
--- /dev/null
+++ b/tools/include/nolibc/time.h
@@ -0,0 +1,31 @@
+/* SPDX-License-Identifier: LGPL-2.1 OR MIT */
+/*
+ * time function definitions for NOLIBC
+ * Copyright (C) 2017-2022 Willy Tarreau <w@1wt.eu>
+ */
+
+#ifndef _NOLIBC_TIME_H
+#define _NOLIBC_TIME_H
+
+#include "std.h"
+#include "arch.h"
+#include "types.h"
+#include "sys.h"
+
+static __attribute__((unused))
+time_t time(time_t *tptr)
+{
+ struct timeval tv;
+
+ /* note, cannot fail here */
+ sys_gettimeofday(&tv, NULL);
+
+ if (tptr)
+ *tptr = tv.tv_sec;
+ return tv.tv_sec;
+}
+
+/* make sure to include all global symbols */
+#include "nolibc.h"
+
+#endif /* _NOLIBC_TIME_H */
diff --git a/tools/include/nolibc/types.h b/tools/include/nolibc/types.h
new file mode 100644
index 000000000..fbbc0e68c
--- /dev/null
+++ b/tools/include/nolibc/types.h
@@ -0,0 +1,215 @@
+/* SPDX-License-Identifier: LGPL-2.1 OR MIT */
+/*
+ * Special types used by various syscalls for NOLIBC
+ * Copyright (C) 2017-2021 Willy Tarreau <w@1wt.eu>
+ */
+
+#ifndef _NOLIBC_TYPES_H
+#define _NOLIBC_TYPES_H
+
+#include "std.h"
+#include <linux/time.h>
+
+
+/* Only the generic macros and types may be defined here. The arch-specific
+ * ones such as the O_RDONLY and related macros used by fcntl() and open(), or
+ * the layout of sys_stat_struct must not be defined here.
+ */
+
+/* stat flags (WARNING, octal here) */
+#define S_IFDIR 0040000
+#define S_IFCHR 0020000
+#define S_IFBLK 0060000
+#define S_IFREG 0100000
+#define S_IFIFO 0010000
+#define S_IFLNK 0120000
+#define S_IFSOCK 0140000
+#define S_IFMT 0170000
+
+#define S_ISDIR(mode) (((mode) & S_IFMT) == S_IFDIR)
+#define S_ISCHR(mode) (((mode) & S_IFMT) == S_IFCHR)
+#define S_ISBLK(mode) (((mode) & S_IFMT) == S_IFBLK)
+#define S_ISREG(mode) (((mode) & S_IFMT) == S_IFREG)
+#define S_ISFIFO(mode) (((mode) & S_IFMT) == S_IFIFO)
+#define S_ISLNK(mode) (((mode) & S_IFMT) == S_IFLNK)
+#define S_ISSOCK(mode) (((mode) & S_IFMT) == S_IFSOCK)
+
+/* dirent types */
+#define DT_UNKNOWN 0x0
+#define DT_FIFO 0x1
+#define DT_CHR 0x2
+#define DT_DIR 0x4
+#define DT_BLK 0x6
+#define DT_REG 0x8
+#define DT_LNK 0xa
+#define DT_SOCK 0xc
+
+/* commonly an fd_set represents 256 FDs */
+#ifndef FD_SETSIZE
+#define FD_SETSIZE 256
+#endif
+
+/* PATH_MAX and MAXPATHLEN are often used and found with plenty of different
+ * values.
+ */
+#ifndef PATH_MAX
+#define PATH_MAX 4096
+#endif
+
+#ifndef MAXPATHLEN
+#define MAXPATHLEN (PATH_MAX)
+#endif
+
+/* Special FD used by all the *at functions */
+#ifndef AT_FDCWD
+#define AT_FDCWD (-100)
+#endif
+
+/* whence values for lseek() */
+#define SEEK_SET 0
+#define SEEK_CUR 1
+#define SEEK_END 2
+
+/* cmd for reboot() */
+#define LINUX_REBOOT_MAGIC1 0xfee1dead
+#define LINUX_REBOOT_MAGIC2 0x28121969
+#define LINUX_REBOOT_CMD_HALT 0xcdef0123
+#define LINUX_REBOOT_CMD_POWER_OFF 0x4321fedc
+#define LINUX_REBOOT_CMD_RESTART 0x01234567
+#define LINUX_REBOOT_CMD_SW_SUSPEND 0xd000fce2
+
+/* Macros used on waitpid()'s return status */
+#define WEXITSTATUS(status) (((status) & 0xff00) >> 8)
+#define WIFEXITED(status) (((status) & 0x7f) == 0)
+
+/* waitpid() flags */
+#define WNOHANG 1
+
+/* standard exit() codes */
+#define EXIT_SUCCESS 0
+#define EXIT_FAILURE 1
+
+#define FD_SETIDXMASK (8 * sizeof(unsigned long))
+#define FD_SETBITMASK (8 * sizeof(unsigned long)-1)
+
+/* for select() */
+typedef struct {
+ unsigned long fds[(FD_SETSIZE + FD_SETBITMASK) / FD_SETIDXMASK];
+} fd_set;
+
+#define FD_CLR(fd, set) do { \
+ fd_set *__set = (set); \
+ int __fd = (fd); \
+ if (__fd >= 0) \
+ __set->fds[__fd / FD_SETIDXMASK] &= \
+ ~(1U << (__fd & FX_SETBITMASK)); \
+ } while (0)
+
+#define FD_SET(fd, set) do { \
+ fd_set *__set = (set); \
+ int __fd = (fd); \
+ if (__fd >= 0) \
+ __set->fds[__fd / FD_SETIDXMASK] |= \
+ 1 << (__fd & FD_SETBITMASK); \
+ } while (0)
+
+#define FD_ISSET(fd, set) ({ \
+ fd_set *__set = (set); \
+ int __fd = (fd); \
+ int __r = 0; \
+ if (__fd >= 0) \
+ __r = !!(__set->fds[__fd / FD_SETIDXMASK] & \
+1U << (__fd & FD_SET_BITMASK)); \
+ __r; \
+ })
+
+#define FD_ZERO(set) do { \
+ fd_set *__set = (set); \
+ int __idx; \
+ int __size = (FD_SETSIZE+FD_SETBITMASK) / FD_SETIDXMASK;\
+ for (__idx = 0; __idx < __size; __idx++) \
+ __set->fds[__idx] = 0; \
+ } while (0)
+
+/* for poll() */
+#define POLLIN 0x0001
+#define POLLPRI 0x0002
+#define POLLOUT 0x0004
+#define POLLERR 0x0008
+#define POLLHUP 0x0010
+#define POLLNVAL 0x0020
+
+struct pollfd {
+ int fd;
+ short int events;
+ short int revents;
+};
+
+/* for getdents64() */
+struct linux_dirent64 {
+ uint64_t d_ino;
+ int64_t d_off;
+ unsigned short d_reclen;
+ unsigned char d_type;
+ char d_name[];
+};
+
+/* needed by wait4() */
+struct rusage {
+ struct timeval ru_utime;
+ struct timeval ru_stime;
+ long ru_maxrss;
+ long ru_ixrss;
+ long ru_idrss;
+ long ru_isrss;
+ long ru_minflt;
+ long ru_majflt;
+ long ru_nswap;
+ long ru_inblock;
+ long ru_oublock;
+ long ru_msgsnd;
+ long ru_msgrcv;
+ long ru_nsignals;
+ long ru_nvcsw;
+ long ru_nivcsw;
+};
+
+/* The format of the struct as returned by the libc to the application, which
+ * significantly differs from the format returned by the stat() syscall flavours.
+ */
+struct stat {
+ dev_t st_dev; /* ID of device containing file */
+ ino_t st_ino; /* inode number */
+ mode_t st_mode; /* protection */
+ nlink_t st_nlink; /* number of hard links */
+ uid_t st_uid; /* user ID of owner */
+ gid_t st_gid; /* group ID of owner */
+ dev_t st_rdev; /* device ID (if special file) */
+ off_t st_size; /* total size, in bytes */
+ blksize_t st_blksize; /* blocksize for file system I/O */
+ blkcnt_t st_blocks; /* number of 512B blocks allocated */
+ time_t st_atime; /* time of last access */
+ time_t st_mtime; /* time of last modification */
+ time_t st_ctime; /* time of last status change */
+};
+
+/* WARNING, it only deals with the 4096 first majors and 256 first minors */
+#define makedev(major, minor) ((dev_t)((((major) & 0xfff) << 8) | ((minor) & 0xff)))
+#define major(dev) ((unsigned int)(((dev) >> 8) & 0xfff))
+#define minor(dev) ((unsigned int)(((dev) & 0xff))
+
+#ifndef offsetof
+#define offsetof(TYPE, FIELD) ((size_t) &((TYPE *)0)->FIELD)
+#endif
+
+#ifndef container_of
+#define container_of(PTR, TYPE, FIELD) ({ \
+ __typeof__(((TYPE *)0)->FIELD) *__FIELD_PTR = (PTR); \
+ (TYPE *)((char *) __FIELD_PTR - offsetof(TYPE, FIELD)); \
+})
+#endif
+
+/* make sure to include all global symbols */
+#include "nolibc.h"
+
+#endif /* _NOLIBC_TYPES_H */
diff --git a/tools/include/nolibc/unistd.h b/tools/include/nolibc/unistd.h
new file mode 100644
index 000000000..1cfcd5210
--- /dev/null
+++ b/tools/include/nolibc/unistd.h
@@ -0,0 +1,57 @@
+/* SPDX-License-Identifier: LGPL-2.1 OR MIT */
+/*
+ * unistd function definitions for NOLIBC
+ * Copyright (C) 2017-2022 Willy Tarreau <w@1wt.eu>
+ */
+
+#ifndef _NOLIBC_UNISTD_H
+#define _NOLIBC_UNISTD_H
+
+#include "std.h"
+#include "arch.h"
+#include "types.h"
+#include "sys.h"
+
+
+static __attribute__((unused))
+int msleep(unsigned int msecs)
+{
+ struct timeval my_timeval = { msecs / 1000, (msecs % 1000) * 1000 };
+
+ if (sys_select(0, 0, 0, 0, &my_timeval) < 0)
+ return (my_timeval.tv_sec * 1000) +
+ (my_timeval.tv_usec / 1000) +
+ !!(my_timeval.tv_usec % 1000);
+ else
+ return 0;
+}
+
+static __attribute__((unused))
+unsigned int sleep(unsigned int seconds)
+{
+ struct timeval my_timeval = { seconds, 0 };
+
+ if (sys_select(0, 0, 0, 0, &my_timeval) < 0)
+ return my_timeval.tv_sec + !!my_timeval.tv_usec;
+ else
+ return 0;
+}
+
+static __attribute__((unused))
+int usleep(unsigned int usecs)
+{
+ struct timeval my_timeval = { usecs / 1000000, usecs % 1000000 };
+
+ return sys_select(0, 0, 0, 0, &my_timeval);
+}
+
+static __attribute__((unused))
+int tcsetpgrp(int fd, pid_t pid)
+{
+ return ioctl(fd, TIOCSPGRP, &pid);
+}
+
+/* make sure to include all global symbols */
+#include "nolibc.h"
+
+#endif /* _NOLIBC_UNISTD_H */
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-22 14:15:25 +0000