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/sys_openbsd_amd64.s | 666 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 666 insertions(+) create mode 100644 src/runtime/sys_openbsd_amd64.s (limited to 'src/runtime/sys_openbsd_amd64.s') diff --git a/src/runtime/sys_openbsd_amd64.s b/src/runtime/sys_openbsd_amd64.s new file mode 100644 index 0000000..ff0bc24 --- /dev/null +++ b/src/runtime/sys_openbsd_amd64.s @@ -0,0 +1,666 @@ +// Copyright 2009 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. +// +// System calls and other sys.stuff for AMD64, OpenBSD. +// System calls are implemented in libc/libpthread, this file +// contains trampolines that convert from Go to C calling convention. +// Some direct system call implementations currently remain. +// + +#include "go_asm.h" +#include "go_tls.h" +#include "textflag.h" +#include "cgo/abi_amd64.h" + +#define CLOCK_MONOTONIC $3 + +TEXT runtime·settls(SB),NOSPLIT,$0 + // Nothing to do, pthread already set thread-local storage up. + RET + +// mstart_stub is the first function executed on a new thread started by pthread_create. +// It just does some low-level setup and then calls mstart. +// Note: called with the C calling convention. +TEXT runtime·mstart_stub(SB),NOSPLIT,$0 + // DI points to the m. + // We are already on m's g0 stack. + + // Transition from C ABI to Go ABI. + PUSH_REGS_HOST_TO_ABI0() + + // Load g and save to TLS entry. + // See cmd/link/internal/ld/sym.go:computeTLSOffset. + MOVQ m_g0(DI), DX // g + MOVQ DX, -8(FS) + + CALL runtime·mstart(SB) + + POP_REGS_HOST_TO_ABI0() + + // Go is all done with this OS thread. + // Tell pthread everything is ok (we never join with this thread, so + // the value here doesn't really matter). + XORL AX, AX + RET + +TEXT runtime·sigfwd(SB),NOSPLIT,$0-32 + MOVQ fn+0(FP), AX + MOVL sig+8(FP), DI + MOVQ info+16(FP), SI + MOVQ ctx+24(FP), DX + MOVQ SP, BX // callee-saved + ANDQ $~15, SP // alignment for x86_64 ABI + CALL AX + MOVQ BX, SP + RET + +// Called using C ABI. +TEXT runtime·sigtramp(SB),NOSPLIT|TOPFRAME|NOFRAME,$0 + // Transition from C ABI to Go ABI. + PUSH_REGS_HOST_TO_ABI0() + + // Set up ABIInternal environment: g in R14, cleared X15. + get_tls(R12) + MOVQ g(R12), R14 + PXOR X15, X15 + + // Reserve space for spill slots. + NOP SP // disable vet stack checking + ADJSP $24 + + // Call into the Go signal handler + MOVQ DI, AX // sig + MOVQ SI, BX // info + MOVQ DX, CX // ctx + CALL ·sigtrampgo(SB) + + ADJSP $-24 + + POP_REGS_HOST_TO_ABI0() + RET + +// +// These trampolines help convert from Go calling convention to C calling convention. +// They should be called with asmcgocall. +// A pointer to the arguments is passed in DI. +// A single int32 result is returned in AX. +// (For more results, make an args/results structure.) +TEXT runtime·pthread_attr_init_trampoline(SB),NOSPLIT,$0 + MOVQ 0(DI), DI // arg 1 - attr + CALL libc_pthread_attr_init(SB) + RET + +TEXT runtime·pthread_attr_destroy_trampoline(SB),NOSPLIT,$0 + MOVQ 0(DI), DI // arg 1 - attr + CALL libc_pthread_attr_destroy(SB) + RET + +TEXT runtime·pthread_attr_getstacksize_trampoline(SB),NOSPLIT,$0 + MOVQ 8(DI), SI // arg 2 - stacksize + MOVQ 0(DI), DI // arg 1 - attr + CALL libc_pthread_attr_getstacksize(SB) + RET + +TEXT runtime·pthread_attr_setdetachstate_trampoline(SB),NOSPLIT,$0 + MOVQ 8(DI), SI // arg 2 - detachstate + MOVQ 0(DI), DI // arg 1 - attr + CALL libc_pthread_attr_setdetachstate(SB) + RET + +TEXT runtime·pthread_create_trampoline(SB),NOSPLIT,$16 + MOVQ 0(DI), SI // arg 2 - attr + MOVQ 8(DI), DX // arg 3 - start + MOVQ 16(DI), CX // arg 4 - arg + MOVQ SP, DI // arg 1 - &thread (discarded) + CALL libc_pthread_create(SB) + RET + +TEXT runtime·thrkill_trampoline(SB),NOSPLIT,$0 + MOVL 8(DI), SI // arg 2 - signal + MOVQ $0, DX // arg 3 - tcb + MOVL 0(DI), DI // arg 1 - tid + CALL libc_thrkill(SB) + RET + +TEXT runtime·thrsleep_trampoline(SB),NOSPLIT,$0 + MOVL 8(DI), SI // arg 2 - clock_id + MOVQ 16(DI), DX // arg 3 - abstime + MOVQ 24(DI), CX // arg 4 - lock + MOVQ 32(DI), R8 // arg 5 - abort + MOVQ 0(DI), DI // arg 1 - id + CALL libc_thrsleep(SB) + RET + +TEXT runtime·thrwakeup_trampoline(SB),NOSPLIT,$0 + MOVL 8(DI), SI // arg 2 - count + MOVQ 0(DI), DI // arg 1 - id + CALL libc_thrwakeup(SB) + RET + +TEXT runtime·exit_trampoline(SB),NOSPLIT,$0 + MOVL 0(DI), DI // arg 1 exit status + CALL libc_exit(SB) + MOVL $0xf1, 0xf1 // crash + RET + +TEXT runtime·getthrid_trampoline(SB),NOSPLIT,$0 + MOVQ DI, BX // BX is caller-save + CALL libc_getthrid(SB) + MOVL AX, 0(BX) // return value + RET + +TEXT runtime·raiseproc_trampoline(SB),NOSPLIT,$0 + MOVL 0(DI), BX // signal + CALL libc_getpid(SB) + MOVL AX, DI // arg 1 pid + MOVL BX, SI // arg 2 signal + CALL libc_kill(SB) + RET + +TEXT runtime·sched_yield_trampoline(SB),NOSPLIT,$0 + CALL libc_sched_yield(SB) + RET + +TEXT runtime·mmap_trampoline(SB),NOSPLIT,$0 + MOVQ DI, BX + MOVQ 0(BX), DI // arg 1 addr + MOVQ 8(BX), SI // arg 2 len + MOVL 16(BX), DX // arg 3 prot + MOVL 20(BX), CX // arg 4 flags + MOVL 24(BX), R8 // arg 5 fid + MOVL 28(BX), R9 // arg 6 offset + CALL libc_mmap(SB) + XORL DX, DX + CMPQ AX, $-1 + JNE ok + CALL libc_errno(SB) + MOVLQSX (AX), DX // errno + XORQ AX, AX +ok: + MOVQ AX, 32(BX) + MOVQ DX, 40(BX) + RET + +TEXT runtime·munmap_trampoline(SB),NOSPLIT,$0 + MOVQ 8(DI), SI // arg 2 len + MOVQ 0(DI), DI // arg 1 addr + CALL libc_munmap(SB) + TESTQ AX, AX + JEQ 2(PC) + MOVL $0xf1, 0xf1 // crash + RET + +TEXT runtime·madvise_trampoline(SB), NOSPLIT, $0 + MOVQ 8(DI), SI // arg 2 len + MOVL 16(DI), DX // arg 3 advice + MOVQ 0(DI), DI // arg 1 addr + CALL libc_madvise(SB) + // ignore failure - maybe pages are locked + RET + +TEXT runtime·open_trampoline(SB),NOSPLIT,$0 + MOVL 8(DI), SI // arg 2 - flags + MOVL 12(DI), DX // arg 3 - mode + MOVQ 0(DI), DI // arg 1 - path + XORL AX, AX // vararg: say "no float args" + CALL libc_open(SB) + RET + +TEXT runtime·close_trampoline(SB),NOSPLIT,$0 + MOVL 0(DI), DI // arg 1 - fd + CALL libc_close(SB) + RET + +TEXT runtime·read_trampoline(SB),NOSPLIT,$0 + MOVQ 8(DI), SI // arg 2 - buf + MOVL 16(DI), DX // arg 3 - count + MOVL 0(DI), DI // arg 1 - fd + CALL libc_read(SB) + TESTL AX, AX + JGE noerr + CALL libc_errno(SB) + MOVL (AX), AX // errno + NEGL AX // caller expects negative errno value +noerr: + RET + +TEXT runtime·write_trampoline(SB),NOSPLIT,$0 + MOVQ 8(DI), SI // arg 2 buf + MOVL 16(DI), DX // arg 3 count + MOVL 0(DI), DI // arg 1 fd + CALL libc_write(SB) + TESTL AX, AX + JGE noerr + CALL libc_errno(SB) + MOVL (AX), AX // errno + NEGL AX // caller expects negative errno value +noerr: + RET + +TEXT runtime·pipe2_trampoline(SB),NOSPLIT,$0 + MOVL 8(DI), SI // arg 2 flags + MOVQ 0(DI), DI // arg 1 filedes + CALL libc_pipe2(SB) + TESTL AX, AX + JEQ 3(PC) + CALL libc_errno(SB) + MOVL (AX), AX // errno + NEGL AX // caller expects negative errno value + RET + +TEXT runtime·setitimer_trampoline(SB),NOSPLIT,$0 + MOVQ 8(DI), SI // arg 2 new + MOVQ 16(DI), DX // arg 3 old + MOVL 0(DI), DI // arg 1 which + CALL libc_setitimer(SB) + RET + +TEXT runtime·usleep_trampoline(SB),NOSPLIT,$0 + MOVL 0(DI), DI // arg 1 usec + CALL libc_usleep(SB) + RET + +TEXT runtime·sysctl_trampoline(SB),NOSPLIT,$0 + MOVL 8(DI), SI // arg 2 miblen + MOVQ 16(DI), DX // arg 3 out + MOVQ 24(DI), CX // arg 4 size + MOVQ 32(DI), R8 // arg 5 dst + MOVQ 40(DI), R9 // arg 6 ndst + MOVQ 0(DI), DI // arg 1 mib + CALL libc_sysctl(SB) + RET + +TEXT runtime·kqueue_trampoline(SB),NOSPLIT,$0 + CALL libc_kqueue(SB) + RET + +TEXT runtime·kevent_trampoline(SB),NOSPLIT,$0 + MOVQ 8(DI), SI // arg 2 keventt + MOVL 16(DI), DX // arg 3 nch + MOVQ 24(DI), CX // arg 4 ev + MOVL 32(DI), R8 // arg 5 nev + MOVQ 40(DI), R9 // arg 6 ts + MOVL 0(DI), DI // arg 1 kq + CALL libc_kevent(SB) + CMPL AX, $-1 + JNE ok + CALL libc_errno(SB) + MOVL (AX), AX // errno + NEGL AX // caller expects negative errno value +ok: + RET + +TEXT runtime·clock_gettime_trampoline(SB),NOSPLIT,$0 + MOVQ 8(DI), SI // arg 2 tp + MOVL 0(DI), DI // arg 1 clock_id + CALL libc_clock_gettime(SB) + TESTL AX, AX + JEQ noerr + CALL libc_errno(SB) + MOVL (AX), AX // errno + NEGL AX // caller expects negative errno value +noerr: + RET + +TEXT runtime·fcntl_trampoline(SB),NOSPLIT,$0 + MOVQ DI, BX + MOVL 0(BX), DI // arg 1 fd + MOVL 4(BX), SI // arg 2 cmd + MOVL 8(BX), DX // arg 3 arg + XORL AX, AX // vararg: say "no float args" + CALL libc_fcntl(SB) + XORL DX, DX + CMPL AX, $-1 + JNE noerr + CALL libc_errno(SB) + MOVL (AX), DX + MOVL $-1, AX +noerr: + MOVL AX, 12(BX) + MOVL DX, 16(BX) + RET + +TEXT runtime·sigaction_trampoline(SB),NOSPLIT,$0 + MOVQ 8(DI), SI // arg 2 new + MOVQ 16(DI), DX // arg 3 old + MOVL 0(DI), DI // arg 1 sig + CALL libc_sigaction(SB) + TESTL AX, AX + JEQ 2(PC) + MOVL $0xf1, 0xf1 // crash + RET + +TEXT runtime·sigprocmask_trampoline(SB),NOSPLIT,$0 + MOVQ 8(DI), SI // arg 2 new + MOVQ 16(DI), DX // arg 3 old + MOVL 0(DI), DI // arg 1 how + CALL libc_pthread_sigmask(SB) + TESTL AX, AX + JEQ 2(PC) + MOVL $0xf1, 0xf1 // crash + RET + +TEXT runtime·sigaltstack_trampoline(SB),NOSPLIT,$0 + MOVQ 8(DI), SI // arg 2 old + MOVQ 0(DI), DI // arg 1 new + CALL libc_sigaltstack(SB) + TESTQ AX, AX + JEQ 2(PC) + MOVL $0xf1, 0xf1 // crash + RET + +// syscall calls a function in libc on behalf of the syscall package. +// syscall takes a pointer to a struct like: +// struct { +// fn uintptr +// a1 uintptr +// a2 uintptr +// a3 uintptr +// r1 uintptr +// r2 uintptr +// err uintptr +// } +// syscall must be called on the g0 stack with the +// C calling convention (use libcCall). +// +// syscall expects a 32-bit result and tests for 32-bit -1 +// to decide there was an error. +TEXT runtime·syscall(SB),NOSPLIT,$16 + MOVQ (0*8)(DI), CX // fn + MOVQ (2*8)(DI), SI // a2 + MOVQ (3*8)(DI), DX // a3 + MOVQ DI, (SP) + MOVQ (1*8)(DI), DI // a1 + XORL AX, AX // vararg: say "no float args" + + CALL CX + + MOVQ (SP), DI + MOVQ AX, (4*8)(DI) // r1 + MOVQ DX, (5*8)(DI) // r2 + + // Standard libc functions return -1 on error + // and set errno. + CMPL AX, $-1 // Note: high 32 bits are junk + JNE ok + + // Get error code from libc. + CALL libc_errno(SB) + MOVLQSX (AX), AX + MOVQ (SP), DI + MOVQ AX, (6*8)(DI) // err + +ok: + XORL AX, AX // no error (it's ignored anyway) + RET + +// syscallX calls a function in libc on behalf of the syscall package. +// syscallX takes a pointer to a struct like: +// struct { +// fn uintptr +// a1 uintptr +// a2 uintptr +// a3 uintptr +// r1 uintptr +// r2 uintptr +// err uintptr +// } +// syscallX must be called on the g0 stack with the +// C calling convention (use libcCall). +// +// syscallX is like syscall but expects a 64-bit result +// and tests for 64-bit -1 to decide there was an error. +TEXT runtime·syscallX(SB),NOSPLIT,$16 + MOVQ (0*8)(DI), CX // fn + MOVQ (2*8)(DI), SI // a2 + MOVQ (3*8)(DI), DX // a3 + MOVQ DI, (SP) + MOVQ (1*8)(DI), DI // a1 + XORL AX, AX // vararg: say "no float args" + + CALL CX + + MOVQ (SP), DI + MOVQ AX, (4*8)(DI) // r1 + MOVQ DX, (5*8)(DI) // r2 + + // Standard libc functions return -1 on error + // and set errno. + CMPQ AX, $-1 + JNE ok + + // Get error code from libc. + CALL libc_errno(SB) + MOVLQSX (AX), AX + MOVQ (SP), DI + MOVQ AX, (6*8)(DI) // err + +ok: + XORL AX, AX // no error (it's ignored anyway) + RET + +// syscall6 calls a function in libc on behalf of the syscall package. +// syscall6 takes a pointer to a struct like: +// struct { +// fn uintptr +// a1 uintptr +// a2 uintptr +// a3 uintptr +// a4 uintptr +// a5 uintptr +// a6 uintptr +// r1 uintptr +// r2 uintptr +// err uintptr +// } +// syscall6 must be called on the g0 stack with the +// C calling convention (use libcCall). +// +// syscall6 expects a 32-bit result and tests for 32-bit -1 +// to decide there was an error. +TEXT runtime·syscall6(SB),NOSPLIT,$16 + MOVQ (0*8)(DI), R11// fn + MOVQ (2*8)(DI), SI // a2 + MOVQ (3*8)(DI), DX // a3 + MOVQ (4*8)(DI), CX // a4 + MOVQ (5*8)(DI), R8 // a5 + MOVQ (6*8)(DI), R9 // a6 + MOVQ DI, (SP) + MOVQ (1*8)(DI), DI // a1 + XORL AX, AX // vararg: say "no float args" + + CALL R11 + + MOVQ (SP), DI + MOVQ AX, (7*8)(DI) // r1 + MOVQ DX, (8*8)(DI) // r2 + + CMPL AX, $-1 + JNE ok + + CALL libc_errno(SB) + MOVLQSX (AX), AX + MOVQ (SP), DI + MOVQ AX, (9*8)(DI) // err + +ok: + XORL AX, AX // no error (it's ignored anyway) + RET + +// syscall6X calls a function in libc on behalf of the syscall package. +// syscall6X takes a pointer to a struct like: +// struct { +// fn uintptr +// a1 uintptr +// a2 uintptr +// a3 uintptr +// a4 uintptr +// a5 uintptr +// a6 uintptr +// r1 uintptr +// r2 uintptr +// err uintptr +// } +// syscall6X must be called on the g0 stack with the +// C calling convention (use libcCall). +// +// syscall6X is like syscall6 but expects a 64-bit result +// and tests for 64-bit -1 to decide there was an error. +TEXT runtime·syscall6X(SB),NOSPLIT,$16 + MOVQ (0*8)(DI), R11// fn + MOVQ (2*8)(DI), SI // a2 + MOVQ (3*8)(DI), DX // a3 + MOVQ (4*8)(DI), CX // a4 + MOVQ (5*8)(DI), R8 // a5 + MOVQ (6*8)(DI), R9 // a6 + MOVQ DI, (SP) + MOVQ (1*8)(DI), DI // a1 + XORL AX, AX // vararg: say "no float args" + + CALL R11 + + MOVQ (SP), DI + MOVQ AX, (7*8)(DI) // r1 + MOVQ DX, (8*8)(DI) // r2 + + CMPQ AX, $-1 + JNE ok + + CALL libc_errno(SB) + MOVLQSX (AX), AX + MOVQ (SP), DI + MOVQ AX, (9*8)(DI) // err + +ok: + XORL AX, AX // no error (it's ignored anyway) + RET + +// syscall10 calls a function in libc on behalf of the syscall package. +// syscall10 takes a pointer to a struct like: +// struct { +// fn uintptr +// a1 uintptr +// a2 uintptr +// a3 uintptr +// a4 uintptr +// a5 uintptr +// a6 uintptr +// a7 uintptr +// a8 uintptr +// a9 uintptr +// a10 uintptr +// r1 uintptr +// r2 uintptr +// err uintptr +// } +// syscall10 must be called on the g0 stack with the +// C calling convention (use libcCall). +TEXT runtime·syscall10(SB),NOSPLIT,$48 + // Arguments a1 to a6 get passed in registers, with a7 onwards being + // passed via the stack per the x86-64 System V ABI + // (https://github.com/hjl-tools/x86-psABI/wiki/x86-64-psABI-1.0.pdf). + MOVQ (7*8)(DI), R10 // a7 + MOVQ (8*8)(DI), R11 // a8 + MOVQ (9*8)(DI), R12 // a9 + MOVQ (10*8)(DI), R13 // a10 + MOVQ R10, (0*8)(SP) // a7 + MOVQ R11, (1*8)(SP) // a8 + MOVQ R12, (2*8)(SP) // a9 + MOVQ R13, (3*8)(SP) // a10 + MOVQ (0*8)(DI), R11 // fn + MOVQ (2*8)(DI), SI // a2 + MOVQ (3*8)(DI), DX // a3 + MOVQ (4*8)(DI), CX // a4 + MOVQ (5*8)(DI), R8 // a5 + MOVQ (6*8)(DI), R9 // a6 + MOVQ DI, (4*8)(SP) + MOVQ (1*8)(DI), DI // a1 + XORL AX, AX // vararg: say "no float args" + + CALL R11 + + MOVQ (4*8)(SP), DI + MOVQ AX, (11*8)(DI) // r1 + MOVQ DX, (12*8)(DI) // r2 + + CMPL AX, $-1 + JNE ok + + CALL libc_errno(SB) + MOVLQSX (AX), AX + MOVQ (4*8)(SP), DI + MOVQ AX, (13*8)(DI) // err + +ok: + XORL AX, AX // no error (it's ignored anyway) + RET + +// syscall10X calls a function in libc on behalf of the syscall package. +// syscall10X takes a pointer to a struct like: +// struct { +// fn uintptr +// a1 uintptr +// a2 uintptr +// a3 uintptr +// a4 uintptr +// a5 uintptr +// a6 uintptr +// a7 uintptr +// a8 uintptr +// a9 uintptr +// a10 uintptr +// r1 uintptr +// r2 uintptr +// err uintptr +// } +// syscall10X must be called on the g0 stack with the +// C calling convention (use libcCall). +// +// syscall10X is like syscall10 but expects a 64-bit result +// and tests for 64-bit -1 to decide there was an error. +TEXT runtime·syscall10X(SB),NOSPLIT,$48 + // Arguments a1 to a6 get passed in registers, with a7 onwards being + // passed via the stack per the x86-64 System V ABI + // (https://github.com/hjl-tools/x86-psABI/wiki/x86-64-psABI-1.0.pdf). + MOVQ (7*8)(DI), R10 // a7 + MOVQ (8*8)(DI), R11 // a8 + MOVQ (9*8)(DI), R12 // a9 + MOVQ (10*8)(DI), R13 // a10 + MOVQ R10, (0*8)(SP) // a7 + MOVQ R11, (1*8)(SP) // a8 + MOVQ R12, (2*8)(SP) // a9 + MOVQ R13, (3*8)(SP) // a10 + MOVQ (0*8)(DI), R11 // fn + MOVQ (2*8)(DI), SI // a2 + MOVQ (3*8)(DI), DX // a3 + MOVQ (4*8)(DI), CX // a4 + MOVQ (5*8)(DI), R8 // a5 + MOVQ (6*8)(DI), R9 // a6 + MOVQ DI, (4*8)(SP) + MOVQ (1*8)(DI), DI // a1 + XORL AX, AX // vararg: say "no float args" + + CALL R11 + + MOVQ (4*8)(SP), DI + MOVQ AX, (11*8)(DI) // r1 + MOVQ DX, (12*8)(DI) // r2 + + CMPQ AX, $-1 + JNE ok + + CALL libc_errno(SB) + MOVLQSX (AX), AX + MOVQ (4*8)(SP), DI + MOVQ AX, (13*8)(DI) // err + +ok: + XORL AX, AX // no error (it's ignored anyway) + RET + +TEXT runtime·issetugid_trampoline(SB),NOSPLIT,$0 + MOVQ DI, BX // BX is caller-save + CALL libc_issetugid(SB) + MOVL AX, 0(BX) // return value + RET -- cgit v1.2.3