diff options
Diffstat (limited to 'src/runtime/sys_windows_386.s')
| -rw-r--r-- | src/runtime/sys_windows_386.s | 98 |
1 files changed, 16 insertions, 82 deletions
diff --git a/src/runtime/sys_windows_386.s b/src/runtime/sys_windows_386.s index ef8a3dd3c2..4f00c58c16 100644 --- a/src/runtime/sys_windows_386.s +++ b/src/runtime/sys_windows_386.s @@ -66,11 +66,6 @@ TEXT runtime·getlasterror(SB),NOSPLIT,$0 MOVL AX, ret+0(FP) RET -TEXT runtime·setlasterror(SB),NOSPLIT,$0 - MOVL err+0(FP), AX - MOVL AX, 0x34(FS) - RET - // Called by Windows as a Vectored Exception Handler (VEH). // First argument is pointer to struct containing // exception record and context pointers. @@ -99,7 +94,7 @@ TEXT sigtramp<>(SB),NOSPLIT,$0-0 JNE 2(PC) CALL runtime·badsignal2(SB) - // save g and SP in case of stack switch + // save g in case of stack switch MOVL DX, 32(SP) // g MOVL SP, 36(SP) @@ -113,13 +108,9 @@ TEXT sigtramp<>(SB),NOSPLIT,$0-0 get_tls(BP) MOVL BX, g(BP) MOVL (g_sched+gobuf_sp)(BX), DI - // make it look like mstart called us on g0, to stop traceback - SUBL $4, DI - MOVL $runtime·mstart(SB), 0(DI) - // traceback will think that we've done SUBL - // on this stack, so subtract them here to match. - // (we need room for sighandler arguments anyway). + // make room for sighandler arguments // and re-save old SP for restoring later. + // (note that the 36(DI) here must match the 36(SP) above.) SUBL $40, DI MOVL SP, 36(DI) MOVL DI, SP @@ -137,7 +128,7 @@ g0: // switch back to original stack and g // no-op if we never left. MOVL 36(SP), SP - MOVL 32(SP), DX + MOVL 32(SP), DX // note: different SP get_tls(BP) MOVL DX, g(BP) @@ -183,7 +174,7 @@ TEXT runtime·profileloop(SB),NOSPLIT,$0 ADDL $12, SP JMP CX -TEXT runtime·externalthreadhandler(SB),NOSPLIT,$0 +TEXT runtime·externalthreadhandler(SB),NOSPLIT|TOPFRAME,$0 PUSHL BP MOVL SP, BP PUSHL BX @@ -347,60 +338,11 @@ TEXT runtime·setldt(SB),NOSPLIT,$0 MOVL CX, 0x14(FS) RET -// onosstack calls fn on OS stack. -// func onosstack(fn unsafe.Pointer, arg uint32) -TEXT runtime·onosstack(SB),NOSPLIT,$0 - MOVL fn+0(FP), AX // to hide from 8l - MOVL arg+4(FP), BX - - // Execute call on m->g0 stack, in case we are not actually - // calling a system call wrapper, like when running under WINE. - get_tls(CX) - CMPL CX, $0 - JNE 3(PC) - // Not a Go-managed thread. Do not switch stack. - CALL AX - RET - - MOVL g(CX), BP - MOVL g_m(BP), BP - - // leave pc/sp for cpu profiler - MOVL (SP), SI - MOVL SI, m_libcallpc(BP) - MOVL g(CX), SI - MOVL SI, m_libcallg(BP) - // sp must be the last, because once async cpu profiler finds - // all three values to be non-zero, it will use them - LEAL fn+0(FP), SI - MOVL SI, m_libcallsp(BP) - - MOVL m_g0(BP), SI - CMPL g(CX), SI - JNE switch - // executing on m->g0 already - CALL AX - JMP ret - -switch: - // Switch to m->g0 stack and back. - MOVL (g_sched+gobuf_sp)(SI), SI - MOVL SP, -4(SI) - LEAL -4(SI), SP - CALL AX - MOVL 0(SP), SP - -ret: - get_tls(CX) - MOVL g(CX), BP - MOVL g_m(BP), BP - MOVL $0, m_libcallsp(BP) - RET - -// Runs on OS stack. duration (in 100ns units) is in BX. -TEXT runtime·usleep2(SB),NOSPLIT,$20 - // Want negative 100ns units. - NEGL BX +// Runs on OS stack. +// duration (in -100ns units) is in dt+0(FP). +// g may be nil. +TEXT runtime·usleep2(SB),NOSPLIT,$20-4 + MOVL dt+0(FP), BX MOVL $-1, hi-4(SP) MOVL BX, lo-8(SP) LEAL lo-8(SP), BX @@ -413,17 +355,15 @@ TEXT runtime·usleep2(SB),NOSPLIT,$20 MOVL BP, SP RET -// Runs on OS stack. duration (in 100ns units) is in BX. -TEXT runtime·usleep2HighRes(SB),NOSPLIT,$36 - get_tls(CX) - CMPL CX, $0 - JE gisnotset - - // Want negative 100ns units. - NEGL BX +// Runs on OS stack. +// duration (in -100ns units) is in dt+0(FP). +// g is valid. +TEXT runtime·usleep2HighRes(SB),NOSPLIT,$36-4 + MOVL dt+0(FP), BX MOVL $-1, hi-4(SP) MOVL BX, lo-8(SP) + get_tls(CX) MOVL g(CX), CX MOVL g_m(CX), CX MOVL (m_mOS+mOS_highResTimer)(CX), CX @@ -452,12 +392,6 @@ TEXT runtime·usleep2HighRes(SB),NOSPLIT,$36 RET -gisnotset: - // TLS is not configured. Call usleep2 instead. - MOVL $runtime·usleep2(SB), AX - CALL AX - RET - // Runs on OS stack. TEXT runtime·switchtothread(SB),NOSPLIT,$0 MOVL SP, BP |