From ccd992355df7192993c666236047820244914598 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Tue, 16 Apr 2024 21:19:13 +0200 Subject: Adding upstream version 1.21.8. Signed-off-by: Daniel Baumann --- src/runtime/syscall_aix.go | 238 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 238 insertions(+) create mode 100644 src/runtime/syscall_aix.go (limited to 'src/runtime/syscall_aix.go') diff --git a/src/runtime/syscall_aix.go b/src/runtime/syscall_aix.go new file mode 100644 index 0000000..e87d4d6 --- /dev/null +++ b/src/runtime/syscall_aix.go @@ -0,0 +1,238 @@ +// Copyright 2018 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package runtime + +import "unsafe" + +// This file handles some syscalls from the syscall package +// Especially, syscalls use during forkAndExecInChild which must not split the stack + +//go:cgo_import_dynamic libc_chdir chdir "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_chroot chroot "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_dup2 dup2 "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_execve execve "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_fcntl fcntl "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_fork fork "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_ioctl ioctl "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_setgid setgid "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_setgroups setgroups "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_setrlimit setrlimit "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_setsid setsid "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_setuid setuid "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_setpgid setpgid "libc.a/shr_64.o" + +//go:linkname libc_chdir libc_chdir +//go:linkname libc_chroot libc_chroot +//go:linkname libc_dup2 libc_dup2 +//go:linkname libc_execve libc_execve +//go:linkname libc_fcntl libc_fcntl +//go:linkname libc_fork libc_fork +//go:linkname libc_ioctl libc_ioctl +//go:linkname libc_setgid libc_setgid +//go:linkname libc_setgroups libc_setgroups +//go:linkname libc_setrlimit libc_setrlimit +//go:linkname libc_setsid libc_setsid +//go:linkname libc_setuid libc_setuid +//go:linkname libc_setpgid libc_setpgid + +var ( + libc_chdir, + libc_chroot, + libc_dup2, + libc_execve, + libc_fcntl, + libc_fork, + libc_ioctl, + libc_setgid, + libc_setgroups, + libc_setrlimit, + libc_setsid, + libc_setuid, + libc_setpgid libFunc +) + +// In syscall_syscall6 and syscall_rawsyscall6, r2 is always 0 +// as it's never used on AIX +// TODO: remove r2 from zsyscall_aix_$GOARCH.go + +// Syscall is needed because some packages (like net) need it too. +// The best way is to return EINVAL and let Golang handles its failure +// If the syscall can't fail, this function can redirect it to a real syscall. +// +// This is exported via linkname to assembly in the syscall package. +// +//go:nosplit +//go:linkname syscall_Syscall +func syscall_Syscall(fn, a1, a2, a3 uintptr) (r1, r2, err uintptr) { + return 0, 0, _EINVAL +} + +// This is syscall.RawSyscall, it exists to satisfy some build dependency, +// but it doesn't work. +// +// This is exported via linkname to assembly in the syscall package. +// +//go:linkname syscall_RawSyscall +func syscall_RawSyscall(trap, a1, a2, a3 uintptr) (r1, r2, err uintptr) { + panic("RawSyscall not available on AIX") +} + +// This is exported via linkname to assembly in the syscall package. +// +//go:nosplit +//go:cgo_unsafe_args +//go:linkname syscall_syscall6 +func syscall_syscall6(fn, nargs, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, err uintptr) { + c := libcall{ + fn: fn, + n: nargs, + args: uintptr(unsafe.Pointer(&a1)), + } + + entersyscallblock() + asmcgocall(unsafe.Pointer(&asmsyscall6), unsafe.Pointer(&c)) + exitsyscall() + return c.r1, 0, c.err +} + +// This is exported via linkname to assembly in the syscall package. +// +//go:nosplit +//go:cgo_unsafe_args +//go:linkname syscall_rawSyscall6 +func syscall_rawSyscall6(fn, nargs, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, err uintptr) { + c := libcall{ + fn: fn, + n: nargs, + args: uintptr(unsafe.Pointer(&a1)), + } + + asmcgocall(unsafe.Pointer(&asmsyscall6), unsafe.Pointer(&c)) + + return c.r1, 0, c.err +} + +//go:linkname syscall_chdir syscall.chdir +//go:nosplit +func syscall_chdir(path uintptr) (err uintptr) { + _, err = syscall1(&libc_chdir, path) + return +} + +//go:linkname syscall_chroot1 syscall.chroot1 +//go:nosplit +func syscall_chroot1(path uintptr) (err uintptr) { + _, err = syscall1(&libc_chroot, path) + return +} + +// like close, but must not split stack, for fork. +// +//go:linkname syscall_closeFD syscall.closeFD +//go:nosplit +func syscall_closeFD(fd int32) int32 { + _, err := syscall1(&libc_close, uintptr(fd)) + return int32(err) +} + +//go:linkname syscall_dup2child syscall.dup2child +//go:nosplit +func syscall_dup2child(old, new uintptr) (val, err uintptr) { + val, err = syscall2(&libc_dup2, old, new) + return +} + +//go:linkname syscall_execve syscall.execve +//go:nosplit +func syscall_execve(path, argv, envp uintptr) (err uintptr) { + _, err = syscall3(&libc_execve, path, argv, envp) + return +} + +// like exit, but must not split stack, for fork. +// +//go:linkname syscall_exit syscall.exit +//go:nosplit +func syscall_exit(code uintptr) { + syscall1(&libc_exit, code) +} + +//go:linkname syscall_fcntl1 syscall.fcntl1 +//go:nosplit +func syscall_fcntl1(fd, cmd, arg uintptr) (val, err uintptr) { + val, err = syscall3(&libc_fcntl, fd, cmd, arg) + return + +} + +//go:linkname syscall_forkx syscall.forkx +//go:nosplit +func syscall_forkx(flags uintptr) (pid uintptr, err uintptr) { + pid, err = syscall1(&libc_fork, flags) + return +} + +//go:linkname syscall_getpid syscall.getpid +//go:nosplit +func syscall_getpid() (pid, err uintptr) { + pid, err = syscall0(&libc_getpid) + return +} + +//go:linkname syscall_ioctl syscall.ioctl +//go:nosplit +func syscall_ioctl(fd, req, arg uintptr) (err uintptr) { + _, err = syscall3(&libc_ioctl, fd, req, arg) + return +} + +//go:linkname syscall_setgid syscall.setgid +//go:nosplit +func syscall_setgid(gid uintptr) (err uintptr) { + _, err = syscall1(&libc_setgid, gid) + return +} + +//go:linkname syscall_setgroups1 syscall.setgroups1 +//go:nosplit +func syscall_setgroups1(ngid, gid uintptr) (err uintptr) { + _, err = syscall2(&libc_setgroups, ngid, gid) + return +} + +//go:linkname syscall_setrlimit1 syscall.setrlimit1 +//go:nosplit +func syscall_setrlimit1(which uintptr, lim unsafe.Pointer) (err uintptr) { + _, err = syscall2(&libc_setrlimit, which, uintptr(lim)) + return +} + +//go:linkname syscall_setsid syscall.setsid +//go:nosplit +func syscall_setsid() (pid, err uintptr) { + pid, err = syscall0(&libc_setsid) + return +} + +//go:linkname syscall_setuid syscall.setuid +//go:nosplit +func syscall_setuid(uid uintptr) (err uintptr) { + _, err = syscall1(&libc_setuid, uid) + return +} + +//go:linkname syscall_setpgid syscall.setpgid +//go:nosplit +func syscall_setpgid(pid, pgid uintptr) (err uintptr) { + _, err = syscall2(&libc_setpgid, pid, pgid) + return +} + +//go:linkname syscall_write1 syscall.write1 +//go:nosplit +func syscall_write1(fd, buf, nbyte uintptr) (n, err uintptr) { + n, err = syscall3(&libc_write, fd, buf, nbyte) + return +} -- cgit v1.2.3