| // 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, FreeBSD |
| // /usr/src/sys/kern/syscalls.master for syscall numbers. |
| // |
| |
| #include "zasm_GOOS_GOARCH.h" |
| #include "textflag.h" |
| |
| TEXT runtime·sys_umtx_sleep(SB),NOSPLIT,$-4 |
| MOVL $469, AX // umtx_sleep |
| INT $0x80 |
| JAE 2(PC) |
| NEGL AX |
| MOVL AX, ret+12(FP) |
| RET |
| |
| TEXT runtime·sys_umtx_wakeup(SB),NOSPLIT,$-4 |
| MOVL $470, AX // umtx_wakeup |
| INT $0x80 |
| JAE 2(PC) |
| NEGL AX |
| MOVL AX, ret+8(FP) |
| RET |
| |
| TEXT runtime·lwp_create(SB),NOSPLIT,$-4 |
| MOVL $495, AX // lwp_create |
| INT $0x80 |
| MOVL AX, ret+4(FP) |
| RET |
| |
| TEXT runtime·lwp_start(SB),NOSPLIT,$0 |
| |
| // Set GS to point at m->tls. |
| MOVL mm+0(FP), BX |
| MOVL m_g0(BX), DX |
| LEAL m_tls(BX), BP |
| PUSHAL |
| PUSHL BP |
| CALL runtime·settls(SB) |
| POPL AX |
| POPAL |
| |
| // Now segment is established. Initialize m, g. |
| get_tls(CX) |
| MOVL BX, g_m(DX) |
| MOVL DX, g(CX) |
| |
| 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 runtime·mstart(SB) |
| |
| CALL runtime·exit1(SB) |
| MOVL $0x1234, 0x1005 |
| RET |
| |
| // Exit the entire program (like C exit) |
| TEXT runtime·exit(SB),NOSPLIT,$-4 |
| MOVL $1, AX |
| INT $0x80 |
| MOVL $0xf1, 0xf1 // crash |
| RET |
| |
| TEXT runtime·exit1(SB),NOSPLIT,$16 |
| MOVL $0, 0(SP) // syscall gap |
| MOVL $0x10000, 4(SP) // arg 1 - how (EXTEXIT_LWP) |
| MOVL $0, 8(SP) // arg 2 - status |
| MOVL $0, 12(SP) // arg 3 - addr |
| MOVL $494, AX |
| INT $0x80 |
| JAE 2(PC) |
| MOVL $0xf1, 0xf1 // crash |
| RET |
| |
| TEXT runtime·open(SB),NOSPLIT,$-4 |
| MOVL $5, AX |
| INT $0x80 |
| MOVL AX, ret+12(FP) |
| RET |
| |
| TEXT runtime·close(SB),NOSPLIT,$-4 |
| MOVL $6, AX |
| INT $0x80 |
| MOVL AX, ret+4(FP) |
| RET |
| |
| TEXT runtime·read(SB),NOSPLIT,$-4 |
| MOVL $3, AX |
| INT $0x80 |
| MOVL AX, ret+12(FP) |
| RET |
| |
| TEXT runtime·write(SB),NOSPLIT,$-4 |
| MOVL $4, AX |
| INT $0x80 |
| MOVL AX, ret+12(FP) |
| RET |
| |
| TEXT runtime·getrlimit(SB),NOSPLIT,$-4 |
| MOVL $194, AX |
| INT $0x80 |
| MOVL AX, ret+8(FP) |
| RET |
| |
| TEXT runtime·raise(SB),NOSPLIT,$16 |
| MOVL $496, AX // lwp_gettid |
| INT $0x80 |
| MOVL $0, 0(SP) |
| MOVL $-1, 4(SP) // arg 1 - pid |
| MOVL AX, 8(SP) // arg 2 - tid |
| MOVL sig+0(FP), AX |
| MOVL AX, 8(SP) // arg 3 - signum |
| MOVL $497, AX // lwp_kill |
| INT $0x80 |
| RET |
| |
| TEXT runtime·mmap(SB),NOSPLIT,$36 |
| LEAL addr+0(FP), SI |
| LEAL 4(SP), DI |
| CLD |
| MOVSL // arg 1 - addr |
| MOVSL // arg 2 - len |
| MOVSL // arg 3 - prot |
| MOVSL // arg 4 - flags |
| MOVSL // arg 5 - fd |
| MOVL $0, AX |
| STOSL // arg 6 - pad |
| MOVSL // arg 7 - offset |
| MOVL $0, AX // top 32 bits of file offset |
| STOSL |
| MOVL $197, AX // sys_mmap |
| INT $0x80 |
| MOVL AX, ret+24(FP) |
| RET |
| |
| TEXT runtime·munmap(SB),NOSPLIT,$-4 |
| MOVL $73, AX |
| INT $0x80 |
| JAE 2(PC) |
| MOVL $0xf1, 0xf1 // crash |
| RET |
| |
| TEXT runtime·madvise(SB),NOSPLIT,$-4 |
| MOVL $75, AX // madvise |
| INT $0x80 |
| // ignore failure - maybe pages are locked |
| RET |
| |
| TEXT runtime·setitimer(SB), NOSPLIT, $-4 |
| MOVL $83, AX |
| INT $0x80 |
| RET |
| |
| // func now() (sec int64, nsec int32) |
| TEXT time·now(SB), NOSPLIT, $32 |
| MOVL $232, AX |
| LEAL 12(SP), BX |
| MOVL $0, 4(SP) // CLOCK_REALTIME |
| MOVL BX, 8(SP) |
| INT $0x80 |
| MOVL 12(SP), AX // sec |
| MOVL 16(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 $232, AX |
| LEAL 12(SP), BX |
| MOVL $4, 4(SP) // CLOCK_MONOTONIC |
| MOVL BX, 8(SP) |
| INT $0x80 |
| MOVL 12(SP), AX // sec |
| MOVL 16(SP), BX // nsec |
| |
| // sec is in AX, nsec in BX |
| // convert to DX:AX nsec |
| MOVL $1000000000, CX |
| MULL CX |
| ADDL BX, AX |
| ADCL $0, DX |
| |
| MOVL AX, ret_lo+0(FP) |
| MOVL DX, ret_hi+4(FP) |
| RET |
| |
| |
| TEXT runtime·sigaction(SB),NOSPLIT,$-4 |
| MOVL $342, AX |
| INT $0x80 |
| JAE 2(PC) |
| MOVL $0xf1, 0xf1 // crash |
| RET |
| |
| TEXT runtime·sigtramp(SB),NOSPLIT,$44 |
| get_tls(CX) |
| |
| // check that g exists |
| MOVL g(CX), DI |
| CMPL DI, $0 |
| JNE 6(PC) |
| MOVL signo+0(FP), BX |
| MOVL BX, 0(SP) |
| MOVL $runtime·badsignal(SB), AX |
| CALL AX |
| JMP sigtramp_ret |
| |
| // save g |
| MOVL DI, 20(SP) |
| |
| // g = m->gsignal |
| MOVL g_m(DI), BX |
| MOVL m_gsignal(BX), BX |
| MOVL BX, g(CX) |
| |
| // copy arguments for call to sighandler |
| MOVL signo+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) |
| |
| sigtramp_ret: |
| // call sigreturn |
| MOVL context+8(FP), AX |
| MOVL $0, 0(SP) // syscall gap |
| MOVL AX, 4(SP) |
| MOVL $344, AX // sigreturn(ucontext) |
| INT $0x80 |
| MOVL $0xf1, 0xf1 // crash |
| RET |
| |
| TEXT runtime·sigaltstack(SB),NOSPLIT,$0 |
| MOVL $53, AX |
| INT $0x80 |
| JAE 2(PC) |
| MOVL $0xf1, 0xf1 // crash |
| RET |
| |
| TEXT runtime·usleep(SB),NOSPLIT,$20 |
| MOVL $0, DX |
| MOVL usec+0(FP), AX |
| MOVL $1000000, CX |
| DIVL CX |
| MOVL AX, 12(SP) // tv_sec |
| MOVL $1000, AX |
| MULL DX |
| MOVL AX, 16(SP) // tv_nsec |
| |
| MOVL $0, 0(SP) |
| LEAL 12(SP), AX |
| MOVL AX, 4(SP) // arg 1 - rqtp |
| MOVL $0, 8(SP) // arg 2 - rmtp |
| MOVL $240, AX // sys_nanosleep |
| INT $0x80 |
| RET |
| |
| TEXT runtime·setldt(SB),NOSPLIT,$4 |
| // Under DragonFly we set the GS base instead of messing with the LDT. |
| MOVL tls0+4(FP), AX |
| MOVL AX, 0(SP) |
| CALL runtime·settls(SB) |
| RET |
| |
| TEXT runtime·settls(SB),NOSPLIT,$24 |
| // adjust for ELF: wants to use -8(GS) and -4(GS) for g and m |
| MOVL tlsbase+0(FP), CX |
| ADDL $8, CX |
| |
| // Set up a struct tls_info - a size of -1 maps the whole address |
| // space and is required for direct-tls access of variable data |
| // via negative offsets. |
| LEAL 16(SP), BX |
| MOVL CX, 16(SP) // base |
| MOVL $-1, 20(SP) // size |
| |
| // set_tls_area returns the descriptor that needs to be loaded into GS. |
| MOVL $0, 0(SP) // syscall gap |
| MOVL $0, 4(SP) // arg 1 - which |
| MOVL BX, 8(SP) // arg 2 - tls_info |
| MOVL $8, 12(SP) // arg 3 - infosize |
| MOVL $472, AX // set_tls_area |
| INT $0x80 |
| JCC 2(PC) |
| MOVL $0xf1, 0xf1 // crash |
| MOVW AX, GS |
| RET |
| |
| TEXT runtime·sysctl(SB),NOSPLIT,$28 |
| LEAL mib+0(FP), SI |
| LEAL 4(SP), DI |
| CLD |
| MOVSL // arg 1 - name |
| MOVSL // arg 2 - namelen |
| MOVSL // arg 3 - oldp |
| MOVSL // arg 4 - oldlenp |
| MOVSL // arg 5 - newp |
| MOVSL // arg 6 - newlen |
| MOVL $202, AX // sys___sysctl |
| INT $0x80 |
| JCC 4(PC) |
| NEGL AX |
| MOVL AX, ret+24(FP) |
| RET |
| MOVL $0, AX |
| MOVL AX, ret+24(FP) |
| RET |
| |
| TEXT runtime·osyield(SB),NOSPLIT,$-4 |
| MOVL $331, AX // sys_sched_yield |
| INT $0x80 |
| RET |
| |
| TEXT runtime·sigprocmask(SB),NOSPLIT,$16 |
| MOVL $0, 0(SP) // syscall gap |
| MOVL $3, 4(SP) // arg 1 - how (SIG_SETMASK) |
| MOVL new+0(FP), AX |
| MOVL AX, 8(SP) // arg 2 - set |
| MOVL old+4(FP), AX |
| MOVL AX, 12(SP) // arg 3 - oset |
| MOVL $340, AX // sys_sigprocmask |
| INT $0x80 |
| JAE 2(PC) |
| MOVL $0xf1, 0xf1 // crash |
| RET |
| |
| // int32 runtime·kqueue(void); |
| TEXT runtime·kqueue(SB),NOSPLIT,$0 |
| MOVL $362, AX |
| INT $0x80 |
| JAE 2(PC) |
| NEGL AX |
| MOVL AX, ret+0(FP) |
| RET |
| |
| // int32 runtime·kevent(int kq, Kevent *changelist, int nchanges, Kevent *eventlist, int nevents, Timespec *timeout); |
| TEXT runtime·kevent(SB),NOSPLIT,$0 |
| MOVL $363, AX |
| INT $0x80 |
| JAE 2(PC) |
| NEGL AX |
| MOVL AX, ret+24(FP) |
| RET |
| |
| // int32 runtime·closeonexec(int32 fd); |
| TEXT runtime·closeonexec(SB),NOSPLIT,$32 |
| MOVL $92, AX // fcntl |
| // 0(SP) is where the caller PC would be; kernel skips it |
| MOVL fd+0(FP), BX |
| MOVL BX, 4(SP) // fd |
| MOVL $2, 8(SP) // F_SETFD |
| MOVL $1, 12(SP) // FD_CLOEXEC |
| INT $0x80 |
| JAE 2(PC) |
| NEGL AX |
| RET |
| |
| GLOBL runtime·tlsoffset(SB),NOPTR,$4 |