diff options
Diffstat (limited to 'src/runtime/asm_mipsx.s')
| -rw-r--r-- | src/runtime/asm_mipsx.s | 83 |
1 files changed, 36 insertions, 47 deletions
diff --git a/src/runtime/asm_mipsx.s b/src/runtime/asm_mipsx.s index ee87d81436..17fbc902c2 100644 --- a/src/runtime/asm_mipsx.s +++ b/src/runtime/asm_mipsx.s @@ -11,7 +11,7 @@ #define REGCTXT R22 -TEXT runtime·rt0_go(SB),NOSPLIT,$0 +TEXT runtime·rt0_go(SB),NOSPLIT|TOPFRAME,$0 // R29 = stack; R4 = argc; R5 = argv ADDU $-12, R29 @@ -86,33 +86,25 @@ TEXT runtime·breakpoint(SB),NOSPLIT,$0-0 TEXT runtime·asminit(SB),NOSPLIT,$0-0 RET +TEXT runtime·mstart(SB),NOSPLIT|TOPFRAME,$0 + JAL runtime·mstart0(SB) + RET // not reached + /* * go-routine */ -// void gosave(Gobuf*) -// save state in Gobuf; setjmp -TEXT runtime·gosave(SB),NOSPLIT|NOFRAME,$0-4 - MOVW buf+0(FP), R1 - MOVW R29, gobuf_sp(R1) - MOVW R31, gobuf_pc(R1) - MOVW g, gobuf_g(R1) - MOVW R0, gobuf_lr(R1) - MOVW R0, gobuf_ret(R1) - // Assert ctxt is zero. See func save. - MOVW gobuf_ctxt(R1), R1 - BEQ R1, 2(PC) - JAL runtime·badctxt(SB) - RET - // void gogo(Gobuf*) // restore state from Gobuf; longjmp -TEXT runtime·gogo(SB),NOSPLIT,$8-4 +TEXT runtime·gogo(SB),NOSPLIT|NOFRAME,$0-4 MOVW buf+0(FP), R3 - MOVW gobuf_g(R3), g // make sure g is not nil - JAL runtime·save_g(SB) + MOVW gobuf_g(R3), R4 + MOVW 0(R4), R5 // make sure g != nil + JMP gogo<>(SB) - MOVW 0(g), R2 +TEXT gogo<>(SB),NOSPLIT|NOFRAME,$0 + MOVW R4, g + JAL runtime·save_g(SB) MOVW gobuf_sp(R3), R29 MOVW gobuf_lr(R3), R31 MOVW gobuf_ret(R3), R1 @@ -133,7 +125,6 @@ TEXT runtime·mcall(SB),NOSPLIT|NOFRAME,$0-4 MOVW R29, (g_sched+gobuf_sp)(g) MOVW R31, (g_sched+gobuf_pc)(g) MOVW R0, (g_sched+gobuf_lr)(g) - MOVW g, (g_sched+gobuf_g)(g) // Switch to m->g0 & its stack, call fn. MOVW g, R1 @@ -185,21 +176,12 @@ TEXT runtime·systemstack(SB),NOSPLIT,$0-4 switch: // save our state in g->sched. Pretend to // be systemstack_switch if the G stack is scanned. - MOVW $runtime·systemstack_switch(SB), R4 - ADDU $8, R4 // get past prologue - MOVW R4, (g_sched+gobuf_pc)(g) - MOVW R29, (g_sched+gobuf_sp)(g) - MOVW R0, (g_sched+gobuf_lr)(g) - MOVW g, (g_sched+gobuf_g)(g) + JAL gosave_systemstack_switch<>(SB) // switch to g0 MOVW R3, g JAL runtime·save_g(SB) MOVW (g_sched+gobuf_sp)(g), R1 - // make it look like mstart called systemstack on g0, to stop traceback - ADDU $-4, R1 - MOVW $runtime·mstart(SB), R2 - MOVW R2, 0(R1) MOVW R1, R29 // call target function @@ -280,7 +262,7 @@ TEXT runtime·morestack_noctxt(SB),NOSPLIT,$0-0 JMP runtime·morestack(SB) // reflectcall: call a function with the given argument list -// func call(argtype *_type, f *FuncVal, arg *byte, argsize, retoffset uint32). +// func call(stackArgsType *_type, f *FuncVal, stackArgs *byte, stackArgsSize, stackRetOffset, frameSize uint32, regArgs *abi.RegArgs). // we don't have variable-sized frames, so we use a small number // of constant-sized-frame functions to encode a few bits of size in the pc. @@ -291,8 +273,8 @@ TEXT runtime·morestack_noctxt(SB),NOSPLIT,$0-0 MOVW $NAME(SB), R4; \ JMP (R4) -TEXT ·reflectcall(SB),NOSPLIT|NOFRAME,$0-20 - MOVW argsize+12(FP), R1 +TEXT ·reflectcall(SB),NOSPLIT|NOFRAME,$0-28 + MOVW frameSize+20(FP), R1 DISPATCH(runtime·call16, 16) DISPATCH(runtime·call32, 32) @@ -325,11 +307,11 @@ TEXT ·reflectcall(SB),NOSPLIT|NOFRAME,$0-20 JMP (R4) #define CALLFN(NAME,MAXSIZE) \ -TEXT NAME(SB),WRAPPER,$MAXSIZE-20; \ +TEXT NAME(SB),WRAPPER,$MAXSIZE-28; \ NO_LOCAL_POINTERS; \ /* copy arguments to stack */ \ - MOVW arg+8(FP), R1; \ - MOVW argsize+12(FP), R2; \ + MOVW stackArgs+8(FP), R1; \ + MOVW stackArgsSize+12(FP), R2; \ MOVW R29, R3; \ ADDU $4, R3; \ ADDU R3, R2; \ @@ -345,10 +327,10 @@ TEXT NAME(SB),WRAPPER,$MAXSIZE-20; \ PCDATA $PCDATA_StackMapIndex, $0; \ JAL (R4); \ /* copy return values back */ \ - MOVW argtype+0(FP), R5; \ - MOVW arg+8(FP), R1; \ - MOVW n+12(FP), R2; \ - MOVW retoffset+16(FP), R4; \ + MOVW stackArgsType+0(FP), R5; \ + MOVW stackArgs+8(FP), R1; \ + MOVW stackArgsSize+12(FP), R2; \ + MOVW stackRetOffset+16(FP), R4; \ ADDU $4, R29, R3; \ ADDU R4, R3; \ ADDU R4, R1; \ @@ -360,11 +342,12 @@ TEXT NAME(SB),WRAPPER,$MAXSIZE-20; \ // separate function so it can allocate stack space for the arguments // to reflectcallmove. It does not follow the Go ABI; it expects its // arguments in registers. -TEXT callRet<>(SB), NOSPLIT, $16-0 +TEXT callRet<>(SB), NOSPLIT, $20-0 MOVW R5, 4(R29) MOVW R1, 8(R29) MOVW R3, 12(R29) MOVW R2, 16(R29) + MOVW $0, 20(R29) JAL runtime·reflectcallmove(SB) RET @@ -415,16 +398,22 @@ TEXT runtime·jmpdefer(SB),NOSPLIT,$0-8 MOVW 0(REGCTXT), R4 JMP (R4) -// Save state of caller into g->sched. Smashes R1. -TEXT gosave<>(SB),NOSPLIT|NOFRAME,$0 - MOVW R31, (g_sched+gobuf_pc)(g) +// Save state of caller into g->sched, +// but using fake PC from systemstack_switch. +// Must only be called from functions with no locals ($0) +// or else unwinding from systemstack_switch is incorrect. +// Smashes R1. +TEXT gosave_systemstack_switch<>(SB),NOSPLIT|NOFRAME,$0 + MOVW $runtime·systemstack_switch(SB), R1 + ADDU $8, R1 // get past prologue + MOVW R1, (g_sched+gobuf_pc)(g) MOVW R29, (g_sched+gobuf_sp)(g) MOVW R0, (g_sched+gobuf_lr)(g) MOVW R0, (g_sched+gobuf_ret)(g) // Assert ctxt is zero. See func save. MOVW (g_sched+gobuf_ctxt)(g), R1 BEQ R1, 2(PC) - JAL runtime·badctxt(SB) + JAL runtime·abort(SB) RET // func asmcgocall(fn, arg unsafe.Pointer) int32 @@ -445,7 +434,7 @@ TEXT ·asmcgocall(SB),NOSPLIT,$0-12 MOVW m_g0(R5), R6 BEQ R6, g, g0 - JAL gosave<>(SB) + JAL gosave_systemstack_switch<>(SB) MOVW R6, g JAL runtime·save_g(SB) MOVW (g_sched+gobuf_sp)(g), R29 |