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Editing: sys_openbsd_386.s
// 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 386, 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" #define CLOCK_MONOTONIC $3 TEXT runtime·setldt(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,$28 NOP SP // tell vet SP changed - stop checking offsets // We are already on m's g0 stack. // Save callee-save registers. MOVL BX, bx-4(SP) MOVL BP, bp-8(SP) MOVL SI, si-12(SP) MOVL DI, di-16(SP) MOVL 32(SP), AX // m MOVL m_g0(AX), DX get_tls(CX) MOVL DX, g(CX) CALL runtime·mstart(SB) // Restore callee-save registers. MOVL di-16(SP), DI MOVL si-12(SP), SI MOVL bp-8(SP), BP MOVL bx-4(SP), BX // 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). MOVL $0, AX RET TEXT runtime·sigfwd(SB),NOSPLIT,$0-16 MOVL fn+0(FP), AX MOVL sig+4(FP), BX MOVL info+8(FP), CX MOVL ctx+12(FP), DX MOVL SP, SI SUBL $32, SP ANDL $~15, SP // align stack: handler might be a C function MOVL BX, 0(SP) MOVL CX, 4(SP) MOVL DX, 8(SP) MOVL SI, 12(SP) // save SI: handler might be a Go function CALL AX MOVL 12(SP), AX MOVL AX, SP RET // Called by OS using C ABI. TEXT runtime·sigtramp(SB),NOSPLIT|TOPFRAME,$28 NOP SP // tell vet SP changed - stop checking offsets // Save callee-saved C registers, since the caller may be a C signal handler. MOVL BX, bx-4(SP) MOVL BP, bp-8(SP) MOVL SI, si-12(SP) MOVL DI, di-16(SP) // We don't save mxcsr or the x87 control word because sigtrampgo doesn't // modify them. MOVL 32(SP), BX // signo MOVL BX, 0(SP) MOVL 36(SP), BX // info MOVL BX, 4(SP) MOVL 40(SP), BX // context MOVL BX, 8(SP) CALL runtime·sigtrampgo(SB) MOVL di-16(SP), DI MOVL si-12(SP), SI MOVL bp-8(SP), BP MOVL bx-4(SP), BX RET // These trampolines help convert from Go calling convention to C calling convention. // They should be called with asmcgocall - note that while asmcgocall does // stack alignment, creation of a frame undoes it again. // A pointer to the arguments is passed on the stack. // 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 PUSHL BP MOVL SP, BP SUBL $4, SP MOVL 12(SP), DX // pointer to args MOVL 0(DX), AX MOVL AX, 0(SP) // arg 1 - attr CALL libc_pthread_attr_init(SB) MOVL BP, SP POPL BP RET TEXT runtime·pthread_attr_destroy_trampoline(SB),NOSPLIT,$0 PUSHL BP MOVL SP, BP SUBL $4, SP MOVL 12(SP), DX // pointer to args MOVL 0(DX), AX MOVL AX, 0(SP) // arg 1 - attr CALL libc_pthread_attr_destroy(SB) MOVL BP, SP POPL BP RET TEXT runtime·pthread_attr_getstacksize_trampoline(SB),NOSPLIT,$0 PUSHL BP MOVL SP, BP SUBL $8, SP MOVL 16(SP), DX // pointer to args MOVL 0(DX), AX MOVL 4(DX), BX MOVL AX, 0(SP) // arg 1 - attr MOVL BX, 4(SP) // arg 2 - size CALL libc_pthread_attr_getstacksize(SB) MOVL BP, SP POPL BP RET TEXT runtime·pthread_attr_setdetachstate_trampoline(SB),NOSPLIT,$0 PUSHL BP MOVL SP, BP SUBL $8, SP MOVL 16(SP), DX // pointer to args MOVL 0(DX), AX MOVL 4(DX), BX MOVL AX, 0(SP) // arg 1 - attr MOVL BX, 4(SP) // arg 2 - state CALL libc_pthread_attr_setdetachstate(SB) MOVL BP, SP POPL BP RET TEXT runtime·pthread_create_trampoline(SB),NOSPLIT,$0 PUSHL BP MOVL SP, BP SUBL $20, SP MOVL 28(SP), DX // pointer to args LEAL 16(SP), AX MOVL AX, 0(SP) // arg 1 - &threadid (discarded) MOVL 0(DX), AX MOVL 4(DX), BX MOVL 8(DX), CX MOVL AX, 4(SP) // arg 2 - attr MOVL BX, 8(SP) // arg 3 - start MOVL CX, 12(SP) // arg 4 - arg CALL libc_pthread_create(SB) MOVL BP, SP POPL BP RET TEXT runtime·thrkill_trampoline(SB),NOSPLIT,$0 PUSHL BP MOVL SP, BP SUBL $12, SP MOVL 20(SP), DX // pointer to args MOVL 0(DX), AX MOVL 4(DX), BX MOVL AX, 0(SP) // arg 1 - tid MOVL BX, 4(SP) // arg 2 - signal MOVL $0, 8(SP) // arg 3 - tcb CALL libc_thrkill(SB) MOVL BP, SP POPL BP RET TEXT runtime·thrsleep_trampoline(SB),NOSPLIT,$0 PUSHL BP MOVL SP, BP SUBL $20, SP MOVL 28(SP), DX // pointer to args MOVL 0(DX), AX MOVL 4(DX), BX MOVL 8(DX), CX MOVL AX, 0(SP) // arg 1 - id MOVL BX, 4(SP) // arg 2 - clock_id MOVL CX, 8(SP) // arg 3 - abstime MOVL 12(DX), AX MOVL 16(DX), BX MOVL AX, 12(SP) // arg 4 - lock MOVL BX, 16(SP) // arg 5 - abort CALL libc_thrsleep(SB) MOVL BP, SP POPL BP RET TEXT runtime·thrwakeup_trampoline(SB),NOSPLIT,$0 PUSHL BP MOVL SP, BP SUBL $8, SP MOVL 16(SP), DX // pointer to args MOVL 0(DX), AX MOVL 4(DX), BX MOVL AX, 0(SP) // arg 1 - id MOVL BX, 4(SP) // arg 2 - count CALL libc_thrwakeup(SB) MOVL BP, SP POPL BP RET TEXT runtime·exit_trampoline(SB),NOSPLIT,$0 PUSHL BP MOVL SP, BP SUBL $4, SP MOVL 12(SP), DX // pointer to args MOVL 0(DX), AX MOVL AX, 0(SP) // arg 1 - status CALL libc_exit(SB) MOVL $0xf1, 0xf1 // crash on failure MOVL BP, SP POPL BP RET TEXT runtime·getthrid_trampoline(SB),NOSPLIT,$0 PUSHL BP CALL libc_getthrid(SB) NOP SP // tell vet SP changed - stop checking offsets MOVL 8(SP), DX // pointer to return value MOVL AX, 0(DX) POPL BP RET TEXT runtime·raiseproc_trampoline(SB),NOSPLIT,$0 PUSHL BP MOVL SP, BP SUBL $8, SP MOVL 16(SP), DX MOVL 0(DX), BX CALL libc_getpid(SB) MOVL AX, 0(SP) // arg 1 - pid MOVL BX, 4(SP) // arg 2 - signal CALL libc_kill(SB) MOVL BP, SP POPL BP RET TEXT runtime·sched_yield_trampoline(SB),NOSPLIT,$0 PUSHL BP MOVL SP, BP CALL libc_sched_yield(SB) MOVL BP, SP POPL BP RET TEXT runtime·mmap_trampoline(SB),NOSPLIT,$0 PUSHL BP MOVL SP, BP SUBL $32, SP MOVL 40(SP), DX // pointer to args MOVL 0(DX), AX MOVL 4(DX), BX MOVL 8(DX), CX MOVL AX, 0(SP) // arg 1 - addr MOVL BX, 4(SP) // arg 2 - len MOVL CX, 8(SP) // arg 3 - prot MOVL 12(DX), AX MOVL 16(DX), BX MOVL 20(DX), CX MOVL AX, 12(SP) // arg 4 - flags MOVL BX, 16(SP) // arg 5 - fid MOVL $0, 20(SP) // pad MOVL CX, 24(SP) // arg 6 - offset (low 32 bits) MOVL $0, 28(SP) // offset (high 32 bits) CALL libc_mmap(SB) MOVL $0, BX CMPL AX, $-1 JNE ok CALL libc_errno(SB) MOVL (AX), BX MOVL $0, AX ok: MOVL 40(SP), DX MOVL AX, 24(DX) MOVL BX, 28(DX) MOVL BP, SP POPL BP RET TEXT runtime·munmap_trampoline(SB),NOSPLIT,$0 PUSHL BP MOVL SP, BP SUBL $8, SP MOVL 16(SP), DX // pointer to args MOVL 0(DX), AX MOVL 4(DX), BX MOVL AX, 0(SP) // arg 1 - addr MOVL BX, 4(SP) // arg 2 - len CALL libc_munmap(SB) CMPL AX, $-1 JNE 2(PC) MOVL $0xf1, 0xf1 // crash on failure MOVL BP, SP POPL BP RET TEXT runtime·madvise_trampoline(SB),NOSPLIT,$0 PUSHL BP MOVL SP, BP SUBL $12, SP MOVL 20(SP), DX // pointer to args MOVL 0(DX), AX MOVL 4(DX), BX MOVL 8(DX), CX MOVL AX, 0(SP) // arg 1 - addr MOVL BX, 4(SP) // arg 2 - len MOVL CX, 8(SP) // arg 3 - advice CALL libc_madvise(SB) // ignore failure - maybe pages are locked MOVL BP, SP POPL BP RET TEXT runtime·open_trampoline(SB),NOSPLIT,$0 PUSHL BP MOVL SP, BP SUBL $16, SP MOVL 24(SP), DX // pointer to args MOVL 0(DX), AX MOVL 4(DX), BX MOVL 8(DX), CX MOVL AX, 0(SP) // arg 1 - path MOVL BX, 4(SP) // arg 2 - flags MOVL CX, 8(SP) // arg 3 - mode MOVL $0, 12(SP) // vararg CALL libc_open(SB) MOVL BP, SP POPL BP RET TEXT runtime·close_trampoline(SB),NOSPLIT,$0 PUSHL BP MOVL SP, BP SUBL $4, SP MOVL 12(SP), DX MOVL 0(DX), AX MOVL AX, 0(SP) // arg 1 - fd CALL libc_close(SB) MOVL BP, SP POPL BP RET TEXT runtime·read_trampoline(SB),NOSPLIT,$0 PUSHL BP MOVL SP, BP SUBL $12, SP MOVL 20(SP), DX // pointer to args MOVL 0(DX), AX MOVL 4(DX), BX MOVL 8(DX), CX MOVL AX, 0(SP) // arg 1 - fd MOVL BX, 4(SP) // arg 2 - buf MOVL CX, 8(SP) // arg 3 - count CALL libc_read(SB) CMPL AX, $-1 JNE noerr CALL libc_errno(SB) MOVL (AX), AX NEGL AX // caller expects negative errno noerr: MOVL BP, SP POPL BP RET TEXT runtime·write_trampoline(SB),NOSPLIT,$0 PUSHL BP MOVL SP, BP SUBL $12, SP MOVL 20(SP), DX // pointer to args MOVL 0(DX), AX MOVL 4(DX), BX MOVL 8(DX), CX MOVL AX, 0(SP) // arg 1 - fd MOVL BX, 4(SP) // arg 2 - buf MOVL CX, 8(SP) // arg 3 - count CALL libc_write(SB) CMPL AX, $-1 JNE noerr CALL libc_errno(SB) MOVL (AX), AX NEGL AX // caller expects negative errno noerr: MOVL BP, SP POPL BP RET TEXT runtime·pipe2_trampoline(SB),NOSPLIT,$0 PUSHL BP MOVL SP, BP SUBL $8, SP MOVL 16(SP), DX // pointer to args MOVL 0(DX), AX MOVL 4(DX), BX MOVL AX, 0(SP) // arg 1 - fds MOVL BX, 4(SP) // arg 2 - flags CALL libc_pipe2(SB) CMPL AX, $-1 JNE noerr CALL libc_errno(SB) MOVL (AX), AX NEGL AX // caller expects negative errno noerr: MOVL BP, SP POPL BP RET TEXT runtime·setitimer_trampoline(SB),NOSPLIT,$0 PUSHL BP MOVL SP, BP SUBL $12, SP MOVL 20(SP), DX // pointer to args MOVL 0(DX), AX MOVL 4(DX), BX MOVL 8(DX), CX MOVL AX, 0(SP) // arg 1 - which MOVL BX, 4(SP) // arg 2 - new MOVL CX, 8(SP) // arg 3 - old CALL libc_setitimer(SB) MOVL BP, SP POPL BP RET TEXT runtime·usleep_trampoline(SB),NOSPLIT,$0 PUSHL BP MOVL SP, BP SUBL $4, SP MOVL 12(SP), DX // pointer to args MOVL 0(DX), AX MOVL AX, 0(SP) CALL libc_usleep(SB) MOVL BP, SP POPL BP RET TEXT runtime·sysctl_trampoline(SB),NOSPLIT,$0 PUSHL BP MOVL SP, BP SUBL $24, SP MOVL 32(SP), DX // pointer to args MOVL 0(DX), AX MOVL 4(DX), BX MOVL 8(DX), CX MOVL AX, 0(SP) // arg 1 - name MOVL BX, 4(SP) // arg 2 - namelen MOVL CX, 8(SP) // arg 3 - old MOVL 12(DX), AX MOVL 16(DX), BX MOVL 20(DX), CX MOVL AX, 12(SP) // arg 4 - oldlenp MOVL BX, 16(SP) // arg 5 - newp MOVL CX, 20(SP) // arg 6 - newlen CALL libc_sysctl(SB) MOVL BP, SP POPL BP RET TEXT runtime·kqueue_trampoline(SB),NOSPLIT,$0 PUSHL BP MOVL SP, BP CALL libc_kqueue(SB) MOVL BP, SP POPL BP RET TEXT runtime·kevent_trampoline(SB),NOSPLIT,$0 PUSHL BP MOVL SP, BP SUBL $24, SP MOVL 32(SP), DX // pointer to args MOVL 0(DX), AX MOVL 4(DX), BX MOVL 8(DX), CX MOVL AX, 0(SP) // arg 1 - kq MOVL BX, 4(SP) // arg 2 - keventt MOVL CX, 8(SP) // arg 3 - nch MOVL 12(DX), AX MOVL 16(DX), BX MOVL 20(DX), CX MOVL AX, 12(SP) // arg 4 - ev MOVL BX, 16(SP) // arg 5 - nev MOVL CX, 20(SP) // arg 6 - ts CALL libc_kevent(SB) CMPL AX, $-1 JNE noerr CALL libc_errno(SB) MOVL (AX), AX NEGL AX // caller expects negative errno noerr: MOVL BP, SP POPL BP RET TEXT runtime·clock_gettime_trampoline(SB),NOSPLIT,$0 PUSHL BP MOVL SP, BP SUBL $8, SP MOVL 16(SP), DX // pointer to args MOVL 0(DX), AX MOVL 4(DX), BX MOVL AX, 0(SP) // arg 1 - tp MOVL BX, 4(SP) // arg 2 - clock_id CALL libc_clock_gettime(SB) CMPL AX, $-1 JNE noerr CALL libc_errno(SB) MOVL (AX), AX NEGL AX // caller expects negative errno noerr: MOVL BP, SP POPL BP RET TEXT runtime·fcntl_trampoline(SB),NOSPLIT,$0 PUSHL BP MOVL SP, BP SUBL $16, SP MOVL 24(SP), DX // pointer to args MOVL 0(DX), AX MOVL 4(DX), BX MOVL 8(DX), CX MOVL AX, 0(SP) // arg 1 - fd MOVL BX, 4(SP) // arg 2 - cmd MOVL CX, 8(SP) // arg 3 - arg MOVL $0, 12(SP) // vararg CALL libc_fcntl(SB) MOVL $0, BX CMPL AX, $-1 JNE noerr CALL libc_errno(SB) MOVL (AX), BX MOVL $-1, AX noerr: MOVL 24(SP), DX // pointer to args MOVL AX, 12(DX) MOVL BX, 16(DX) MOVL BP, SP POPL BP RET TEXT runtime·sigaction_trampoline(SB),NOSPLIT,$0 PUSHL BP MOVL SP, BP SUBL $12, SP MOVL 20(SP), DX // pointer to args MOVL 0(DX), AX MOVL 4(DX), BX MOVL 8(DX), CX MOVL AX, 0(SP) // arg 1 - sig MOVL BX, 4(SP) // arg 2 - new MOVL CX, 8(SP) // arg 3 - old CALL libc_sigaction(SB) CMPL AX, $-1 JNE 2(PC) MOVL $0xf1, 0xf1 // crash on failure MOVL BP, SP POPL BP RET TEXT runtime·sigprocmask_trampoline(SB),NOSPLIT,$0 PUSHL BP MOVL SP, BP SUBL $12, SP MOVL 20(SP), DX // pointer to args MOVL 0(DX), AX MOVL 4(DX), BX MOVL 8(DX), CX MOVL AX, 0(SP) // arg 1 - how MOVL BX, 4(SP) // arg 2 - new MOVL CX, 8(SP) // arg 3 - old CALL libc_pthread_sigmask(SB) CMPL AX, $-1 JNE 2(PC) MOVL $0xf1, 0xf1 // crash on failure MOVL BP, SP POPL BP RET TEXT runtime·sigaltstack_trampoline(SB),NOSPLIT,$0 PUSHL BP MOVL SP, BP SUBL $8, SP MOVL 16(SP), DX // pointer to args MOVL 0(DX), AX MOVL 4(DX), BX MOVL AX, 0(SP) // arg 1 - new MOVL BX, 4(SP) // arg 2 - old CALL libc_sigaltstack(SB) CMPL AX, $-1 JNE 2(PC) MOVL $0xf1, 0xf1 // crash on failure MOVL BP, SP POPL BP 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,$0 PUSHL BP MOVL SP, BP SUBL $12, SP MOVL 20(SP), BX // pointer to args MOVL (1*4)(BX), AX MOVL (2*4)(BX), CX MOVL (3*4)(BX), DX MOVL AX, (0*4)(SP) // a1 MOVL CX, (1*4)(SP) // a2 MOVL DX, (2*4)(SP) // a3 MOVL (0*4)(BX), AX // fn CALL AX MOVL AX, (4*4)(BX) // r1 MOVL DX, (5*4)(BX) // r2 // Standard libc functions return -1 on error and set errno. CMPL AX, $-1 JNE ok // Get error code from libc. CALL libc_errno(SB) MOVL (AX), AX MOVW AX, (6*4)(BX) // err ok: MOVL $0, AX // no error (it's ignored anyway) MOVL BP, SP POPL BP 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,$0 PUSHL BP MOVL SP, BP SUBL $12, SP MOVL 20(SP), BX // pointer to args MOVL (1*4)(BX), AX MOVL (2*4)(BX), CX MOVL (3*4)(BX), DX MOVL AX, (0*4)(SP) // a1 MOVL CX, (1*4)(SP) // a2 MOVL DX, (2*4)(SP) // a3 MOVL (0*4)(BX), AX // fn CALL AX MOVL AX, (4*4)(BX) // r1 MOVL DX, (5*4)(BX) // r2 // Standard libc functions return -1 on error and set errno. CMPL AX, $-1 JNE ok CMPL DX, $-1 JNE ok // Get error code from libc. CALL libc_errno(SB) MOVL (AX), AX MOVW AX, (6*4)(BX) // err ok: MOVL $0, AX // no error (it's ignored anyway) MOVL BP, SP POPL BP 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,$0 PUSHL BP MOVL SP, BP SUBL $24, SP MOVL 32(SP), BX // pointer to args MOVL (1*4)(BX), AX MOVL (2*4)(BX), CX MOVL (3*4)(BX), DX MOVL AX, (0*4)(SP) // a1 MOVL CX, (1*4)(SP) // a2 MOVL DX, (2*4)(SP) // a3 MOVL (4*4)(BX), AX MOVL (5*4)(BX), CX MOVL (6*4)(BX), DX MOVL AX, (3*4)(SP) // a4 MOVL CX, (4*4)(SP) // a5 MOVL DX, (5*4)(SP) // a6 MOVL (0*4)(BX), AX // fn CALL AX MOVL AX, (7*4)(BX) // r1 MOVL DX, (8*4)(BX) // r2 // Standard libc functions return -1 on error and set errno. CMPL AX, $-1 JNE ok // Get error code from libc. CALL libc_errno(SB) MOVL (AX), AX MOVW AX, (9*4)(BX) // err ok: MOVL $0, AX // no error (it's ignored anyway) MOVL BP, SP POPL BP 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,$0 PUSHL BP MOVL SP, BP SUBL $24, SP MOVL 32(SP), BX // pointer to args MOVL (1*4)(BX), AX MOVL (2*4)(BX), CX MOVL (3*4)(BX), DX MOVL AX, (0*4)(SP) // a1 MOVL CX, (1*4)(SP) // a2 MOVL DX, (2*4)(SP) // a3 MOVL (4*4)(BX), AX MOVL (5*4)(BX), CX MOVL (6*4)(BX), DX MOVL AX, (3*4)(SP) // a4 MOVL CX, (4*4)(SP) // a5 MOVL DX, (5*4)(SP) // a6 MOVL (0*4)(BX), AX // fn CALL AX MOVL AX, (7*4)(BX) // r1 MOVL DX, (8*4)(BX) // r2 // Standard libc functions return -1 on error and set errno. CMPL AX, $-1 JNE ok CMPL DX, $-1 JNE ok // Get error code from libc. CALL libc_errno(SB) MOVL (AX), AX MOVW AX, (9*4)(BX) // err ok: MOVL $0, AX // no error (it's ignored anyway) MOVL BP, SP POPL BP 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,$0 PUSHL BP MOVL SP, BP SUBL $40, SP MOVL 48(SP), BX // pointer to args MOVL (1*4)(BX), AX MOVL (2*4)(BX), CX MOVL (3*4)(BX), DX MOVL AX, (0*4)(SP) // a1 MOVL CX, (1*4)(SP) // a2 MOVL DX, (2*4)(SP) // a3 MOVL (4*4)(BX), AX MOVL (5*4)(BX), CX MOVL (6*4)(BX), DX MOVL AX, (3*4)(SP) // a4 MOVL CX, (4*4)(SP) // a5 MOVL DX, (5*4)(SP) // a6 MOVL (7*4)(BX), AX MOVL (8*4)(BX), CX MOVL (9*4)(BX), DX MOVL AX, (6*4)(SP) // a7 MOVL CX, (7*4)(SP) // a8 MOVL DX, (8*4)(SP) // a9 MOVL (10*4)(BX), AX MOVL AX, (9*4)(SP) // a10 MOVL (0*4)(BX), AX // fn CALL AX MOVL AX, (11*4)(BX) // r1 MOVL DX, (12*4)(BX) // r2 // Standard libc functions return -1 on error and set errno. CMPL AX, $-1 JNE ok // Get error code from libc. CALL libc_errno(SB) MOVL (AX), AX MOVW AX, (13*4)(BX) // err ok: MOVL $0, AX // no error (it's ignored anyway) MOVL BP, SP POPL BP 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 syscall9 but expects a 64-bit result // and tests for 64-bit -1 to decide there was an error. TEXT runtime·syscall10X(SB),NOSPLIT,$0 PUSHL BP MOVL SP, BP SUBL $40, SP MOVL 48(SP), BX // pointer to args MOVL (1*4)(BX), AX MOVL (2*4)(BX), CX MOVL (3*4)(BX), DX MOVL AX, (0*4)(SP) // a1 MOVL CX, (1*4)(SP) // a2 MOVL DX, (2*4)(SP) // a3 MOVL (4*4)(BX), AX MOVL (5*4)(BX), CX MOVL (6*4)(BX), DX MOVL AX, (3*4)(SP) // a4 MOVL CX, (4*4)(SP) // a5 MOVL DX, (5*4)(SP) // a6 MOVL (7*4)(BX), AX MOVL (8*4)(BX), CX MOVL (9*4)(BX), DX MOVL AX, (6*4)(SP) // a7 MOVL CX, (7*4)(SP) // a8 MOVL DX, (8*4)(SP) // a9 MOVL (10*4)(BX), AX MOVL AX, (9*4)(SP) // a10 MOVL (0*4)(BX), AX // fn CALL AX MOVL AX, (11*4)(BX) // r1 MOVL DX, (12*4)(BX) // r2 // Standard libc functions return -1 on error and set errno. CMPL AX, $-1 JNE ok CMPL DX, $-1 JNE ok // Get error code from libc. CALL libc_errno(SB) MOVL (AX), AX MOVW AX, (13*4)(BX) // err ok: MOVL $0, AX // no error (it's ignored anyway) MOVL BP, SP POPL BP RET TEXT runtime·issetugid_trampoline(SB),NOSPLIT,$0 PUSHL BP CALL libc_issetugid(SB) NOP SP // tell vet SP changed - stop checking offsets MOVL 8(SP), DX // pointer to return value MOVL AX, 0(DX) POPL BP RET
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