diff options
Diffstat (limited to 'src/pkg/runtime/sys_linux_386.s')
-rw-r--r-- | src/pkg/runtime/sys_linux_386.s | 477 |
1 files changed, 0 insertions, 477 deletions
diff --git a/src/pkg/runtime/sys_linux_386.s b/src/pkg/runtime/sys_linux_386.s deleted file mode 100644 index b7896f178..000000000 --- a/src/pkg/runtime/sys_linux_386.s +++ /dev/null @@ -1,477 +0,0 @@ -// 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, Linux -// - -#include "zasm_GOOS_GOARCH.h" -#include "../../cmd/ld/textflag.h" - -TEXT runtime·exit(SB),NOSPLIT,$0 - MOVL $252, AX // syscall number - MOVL 4(SP), BX - CALL *runtime·_vdso(SB) - INT $3 // not reached - RET - -TEXT runtime·exit1(SB),NOSPLIT,$0 - MOVL $1, AX // exit - exit the current os thread - MOVL 4(SP), BX - CALL *runtime·_vdso(SB) - INT $3 // not reached - RET - -TEXT runtime·open(SB),NOSPLIT,$0 - MOVL $5, AX // syscall - open - MOVL 4(SP), BX - MOVL 8(SP), CX - MOVL 12(SP), DX - CALL *runtime·_vdso(SB) - RET - -TEXT runtime·close(SB),NOSPLIT,$0 - MOVL $6, AX // syscall - close - MOVL 4(SP), BX - CALL *runtime·_vdso(SB) - RET - -TEXT runtime·write(SB),NOSPLIT,$0 - MOVL $4, AX // syscall - write - MOVL 4(SP), BX - MOVL 8(SP), CX - MOVL 12(SP), DX - CALL *runtime·_vdso(SB) - RET - -TEXT runtime·read(SB),NOSPLIT,$0 - MOVL $3, AX // syscall - read - MOVL 4(SP), BX - MOVL 8(SP), CX - MOVL 12(SP), DX - CALL *runtime·_vdso(SB) - RET - -TEXT runtime·getrlimit(SB),NOSPLIT,$0 - MOVL $191, AX // syscall - ugetrlimit - MOVL 4(SP), BX - MOVL 8(SP), CX - CALL *runtime·_vdso(SB) - RET - -TEXT runtime·usleep(SB),NOSPLIT,$8 - MOVL $0, DX - MOVL usec+0(FP), AX - MOVL $1000000, CX - DIVL CX - MOVL AX, 0(SP) - MOVL DX, 4(SP) - - // select(0, 0, 0, 0, &tv) - MOVL $142, AX - MOVL $0, BX - MOVL $0, CX - MOVL $0, DX - MOVL $0, SI - LEAL 0(SP), DI - CALL *runtime·_vdso(SB) - RET - -TEXT runtime·raise(SB),NOSPLIT,$12 - MOVL $224, AX // syscall - gettid - CALL *runtime·_vdso(SB) - MOVL AX, BX // arg 1 tid - MOVL sig+0(FP), CX // arg 2 signal - MOVL $238, AX // syscall - tkill - CALL *runtime·_vdso(SB) - RET - -TEXT runtime·setitimer(SB),NOSPLIT,$0-24 - MOVL $104, AX // syscall - setitimer - MOVL 4(SP), BX - MOVL 8(SP), CX - MOVL 12(SP), DX - CALL *runtime·_vdso(SB) - RET - -TEXT runtime·mincore(SB),NOSPLIT,$0-24 - MOVL $218, AX // syscall - mincore - MOVL 4(SP), BX - MOVL 8(SP), CX - MOVL 12(SP), DX - CALL *runtime·_vdso(SB) - RET - -// func now() (sec int64, nsec int32) -TEXT time·now(SB), NOSPLIT, $32 - MOVL $265, AX // syscall - clock_gettime - MOVL $0, BX // CLOCK_REALTIME - LEAL 8(SP), CX - MOVL $0, DX - CALL *runtime·_vdso(SB) - MOVL 8(SP), AX // sec - MOVL 12(SP), BX // nsec - - // sec is in AX, nsec in BX - MOVL AX, sec+0(FP) - MOVL $0, sec+4(FP) - MOVL BX, nsec+8(FP) - RET - -// int64 nanotime(void) so really -// void nanotime(int64 *nsec) -TEXT runtime·nanotime(SB), NOSPLIT, $32 - MOVL $265, AX // syscall - clock_gettime - MOVL $1, BX // CLOCK_MONOTONIC - LEAL 8(SP), CX - MOVL $0, DX - CALL *runtime·_vdso(SB) - MOVL 8(SP), AX // sec - MOVL 12(SP), BX // nsec - - // sec is in AX, nsec in BX - // convert to DX:AX nsec - MOVL $1000000000, CX - MULL CX - ADDL BX, AX - ADCL $0, DX - - MOVL ret+0(FP), DI - MOVL AX, 0(DI) - MOVL DX, 4(DI) - RET - -TEXT runtime·rtsigprocmask(SB),NOSPLIT,$0 - MOVL $175, AX // syscall entry - MOVL 4(SP), BX - MOVL 8(SP), CX - MOVL 12(SP), DX - MOVL 16(SP), SI - CALL *runtime·_vdso(SB) - CMPL AX, $0xfffff001 - JLS 2(PC) - INT $3 - RET - -TEXT runtime·rt_sigaction(SB),NOSPLIT,$0 - MOVL $174, AX // syscall - rt_sigaction - MOVL 4(SP), BX - MOVL 8(SP), CX - MOVL 12(SP), DX - MOVL 16(SP), SI - CALL *runtime·_vdso(SB) - RET - -TEXT runtime·sigtramp(SB),NOSPLIT,$44 - get_tls(CX) - - // check that m exists - MOVL m(CX), BX - CMPL BX, $0 - JNE 6(PC) - MOVL sig+0(FP), BX - MOVL BX, 0(SP) - MOVL $runtime·badsignal(SB), AX - CALL AX - RET - - // save g - MOVL g(CX), DI - MOVL DI, 20(SP) - - // g = m->gsignal - MOVL m(CX), BX - MOVL m_gsignal(BX), BX - MOVL BX, g(CX) - - // copy arguments for call to sighandler - MOVL sig+0(FP), BX - MOVL BX, 0(SP) - MOVL info+4(FP), BX - MOVL BX, 4(SP) - MOVL context+8(FP), BX - MOVL BX, 8(SP) - MOVL DI, 12(SP) - - CALL runtime·sighandler(SB) - - // restore g - get_tls(CX) - MOVL 20(SP), BX - MOVL BX, g(CX) - - RET - -TEXT runtime·sigreturn(SB),NOSPLIT,$0 - MOVL $173, AX // rt_sigreturn - // Sigreturn expects same SP as signal handler, - // so cannot CALL *runtime._vsdo(SB) here. - INT $0x80 - INT $3 // not reached - RET - -TEXT runtime·mmap(SB),NOSPLIT,$0 - MOVL $192, AX // mmap2 - MOVL 4(SP), BX - MOVL 8(SP), CX - MOVL 12(SP), DX - MOVL 16(SP), SI - MOVL 20(SP), DI - MOVL 24(SP), BP - SHRL $12, BP - CALL *runtime·_vdso(SB) - CMPL AX, $0xfffff001 - JLS 3(PC) - NOTL AX - INCL AX - RET - -TEXT runtime·munmap(SB),NOSPLIT,$0 - MOVL $91, AX // munmap - MOVL 4(SP), BX - MOVL 8(SP), CX - CALL *runtime·_vdso(SB) - CMPL AX, $0xfffff001 - JLS 2(PC) - INT $3 - RET - -TEXT runtime·madvise(SB),NOSPLIT,$0 - MOVL $219, AX // madvise - MOVL 4(SP), BX - MOVL 8(SP), CX - MOVL 12(SP), DX - CALL *runtime·_vdso(SB) - // ignore failure - maybe pages are locked - RET - -// int32 futex(int32 *uaddr, int32 op, int32 val, -// struct timespec *timeout, int32 *uaddr2, int32 val2); -TEXT runtime·futex(SB),NOSPLIT,$0 - MOVL $240, AX // futex - MOVL 4(SP), BX - MOVL 8(SP), CX - MOVL 12(SP), DX - MOVL 16(SP), SI - MOVL 20(SP), DI - MOVL 24(SP), BP - CALL *runtime·_vdso(SB) - RET - -// int32 clone(int32 flags, void *stack, M *mp, G *gp, void (*fn)(void)); -TEXT runtime·clone(SB),NOSPLIT,$0 - MOVL $120, AX // clone - MOVL flags+4(SP), BX - MOVL stack+8(SP), CX - MOVL $0, DX // parent tid ptr - MOVL $0, DI // child tid ptr - - // Copy mp, gp, fn off parent stack for use by child. - SUBL $16, CX - MOVL mm+12(SP), SI - MOVL SI, 0(CX) - MOVL gg+16(SP), SI - MOVL SI, 4(CX) - MOVL fn+20(SP), SI - MOVL SI, 8(CX) - MOVL $1234, 12(CX) - - // cannot use CALL *runtime·_vdso(SB) here, because - // the stack changes during the system call (after - // CALL *runtime·_vdso(SB), the child is still using - // the parent's stack when executing its RET instruction). - INT $0x80 - - // In parent, return. - CMPL AX, $0 - JEQ 2(PC) - RET - - // Paranoia: check that SP is as we expect. - MOVL 12(SP), BP - CMPL BP, $1234 - JEQ 2(PC) - INT $3 - - // Initialize AX to Linux tid - MOVL $224, AX - CALL *runtime·_vdso(SB) - - // In child on new stack. Reload registers (paranoia). - MOVL 0(SP), BX // m - MOVL 4(SP), DX // g - MOVL 8(SP), SI // fn - - MOVL AX, m_procid(BX) // save tid as m->procid - - // set up ldt 7+id to point at m->tls. - // newosproc left the id in tls[0]. - LEAL m_tls(BX), BP - MOVL 0(BP), DI - ADDL $7, DI // m0 is LDT#7. count up. - // setldt(tls#, &tls, sizeof tls) - PUSHAL // save registers - PUSHL $32 // sizeof tls - PUSHL BP // &tls - PUSHL DI // tls # - CALL runtime·setldt(SB) - POPL AX - POPL AX - POPL AX - POPAL - - // Now segment is established. Initialize m, g. - get_tls(AX) - MOVL DX, g(AX) - MOVL BX, m(AX) - - CALL runtime·stackcheck(SB) // smashes AX, CX - MOVL 0(DX), DX // paranoia; check they are not nil - MOVL 0(BX), BX - - // more paranoia; check that stack splitting code works - PUSHAL - CALL runtime·emptyfunc(SB) - POPAL - - CALL SI // fn() - CALL runtime·exit1(SB) - MOVL $0x1234, 0x1005 - RET - -TEXT runtime·sigaltstack(SB),NOSPLIT,$-8 - MOVL $186, AX // sigaltstack - MOVL new+4(SP), BX - MOVL old+8(SP), CX - CALL *runtime·_vdso(SB) - CMPL AX, $0xfffff001 - JLS 2(PC) - INT $3 - RET - -// <asm-i386/ldt.h> -// struct user_desc { -// unsigned int entry_number; -// unsigned long base_addr; -// unsigned int limit; -// unsigned int seg_32bit:1; -// unsigned int contents:2; -// unsigned int read_exec_only:1; -// unsigned int limit_in_pages:1; -// unsigned int seg_not_present:1; -// unsigned int useable:1; -// }; -#define SEG_32BIT 0x01 -// contents are the 2 bits 0x02 and 0x04. -#define CONTENTS_DATA 0x00 -#define CONTENTS_STACK 0x02 -#define CONTENTS_CODE 0x04 -#define READ_EXEC_ONLY 0x08 -#define LIMIT_IN_PAGES 0x10 -#define SEG_NOT_PRESENT 0x20 -#define USEABLE 0x40 - -// setldt(int entry, int address, int limit) -TEXT runtime·setldt(SB),NOSPLIT,$32 - MOVL entry+0(FP), BX // entry - MOVL address+4(FP), CX // base address - - /* - * When linking against the system libraries, - * we use its pthread_create and let it set up %gs - * for us. When we do that, the private storage - * we get is not at 0(GS), 4(GS), but -8(GS), -4(GS). - * To insulate the rest of the tool chain from this - * ugliness, 8l rewrites 0(TLS) into -8(GS) for us. - * To accommodate that rewrite, we translate - * the address here and bump the limit to 0xffffffff (no limit) - * so that -8(GS) maps to 0(address). - * Also, the final 0(GS) (current 8(CX)) has to point - * to itself, to mimic ELF. - */ - ADDL $0x8, CX // address - MOVL CX, 0(CX) - - // set up user_desc - LEAL 16(SP), AX // struct user_desc - MOVL BX, 0(AX) - MOVL CX, 4(AX) - MOVL $0xfffff, 8(AX) - MOVL $(SEG_32BIT|LIMIT_IN_PAGES|USEABLE|CONTENTS_DATA), 12(AX) // flag bits - - // call modify_ldt - MOVL $1, BX // func = 1 (write) - MOVL AX, CX // user_desc - MOVL $16, DX // sizeof(user_desc) - MOVL $123, AX // syscall - modify_ldt - CALL *runtime·_vdso(SB) - - // breakpoint on error - CMPL AX, $0xfffff001 - JLS 2(PC) - INT $3 - - // compute segment selector - (entry*8+7) - MOVL entry+0(FP), AX - SHLL $3, AX - ADDL $7, AX - MOVW AX, GS - - RET - -TEXT runtime·osyield(SB),NOSPLIT,$0 - MOVL $158, AX - CALL *runtime·_vdso(SB) - RET - -TEXT runtime·sched_getaffinity(SB),NOSPLIT,$0 - MOVL $242, AX // syscall - sched_getaffinity - MOVL 4(SP), BX - MOVL 8(SP), CX - MOVL 12(SP), DX - CALL *runtime·_vdso(SB) - RET - -// int32 runtime·epollcreate(int32 size); -TEXT runtime·epollcreate(SB),NOSPLIT,$0 - MOVL $254, AX - MOVL 4(SP), BX - CALL *runtime·_vdso(SB) - RET - -// int32 runtime·epollcreate1(int32 flags); -TEXT runtime·epollcreate1(SB),NOSPLIT,$0 - MOVL $329, AX - MOVL 4(SP), BX - CALL *runtime·_vdso(SB) - RET - -// int32 runtime·epollctl(int32 epfd, int32 op, int32 fd, EpollEvent *ev); -TEXT runtime·epollctl(SB),NOSPLIT,$0 - MOVL $255, AX - MOVL 4(SP), BX - MOVL 8(SP), CX - MOVL 12(SP), DX - MOVL 16(SP), SI - CALL *runtime·_vdso(SB) - RET - -// int32 runtime·epollwait(int32 epfd, EpollEvent *ev, int32 nev, int32 timeout); -TEXT runtime·epollwait(SB),NOSPLIT,$0 - MOVL $256, AX - MOVL 4(SP), BX - MOVL 8(SP), CX - MOVL 12(SP), DX - MOVL 16(SP), SI - CALL *runtime·_vdso(SB) - RET - -// void runtime·closeonexec(int32 fd); -TEXT runtime·closeonexec(SB),NOSPLIT,$0 - MOVL $55, AX // fcntl - MOVL 4(SP), BX // fd - MOVL $2, CX // F_SETFD - MOVL $1, DX // FD_CLOEXEC - CALL *runtime·_vdso(SB) - RET |