diff options
Diffstat (limited to 'src/pkg/runtime/arm/asm.s')
| -rw-r--r-- | src/pkg/runtime/arm/asm.s | 65 |
1 files changed, 37 insertions, 28 deletions
diff --git a/src/pkg/runtime/arm/asm.s b/src/pkg/runtime/arm/asm.s index f9fe7e628..4d36606a7 100644 --- a/src/pkg/runtime/arm/asm.s +++ b/src/pkg/runtime/arm/asm.s @@ -93,14 +93,13 @@ TEXT runtime·breakpoint(SB),7,$0 * go-routine */ -// uintptr gosave(Gobuf*) +// void gosave(Gobuf*) // save state in Gobuf; setjmp TEXT runtime·gosave(SB), 7, $-4 MOVW 0(FP), R0 // gobuf MOVW SP, gobuf_sp(R0) MOVW LR, gobuf_pc(R0) MOVW g, gobuf_g(R0) - MOVW $0, R0 // return 0 RET // void gogo(Gobuf*, uintptr) @@ -127,6 +126,30 @@ TEXT runtime·gogocall(SB), 7, $-4 MOVW gobuf_pc(R0), LR MOVW R1, PC +// void mcall(void (*fn)(G*)) +// Switch to m->g0's stack, call fn(g). +// Fn must never return. It should gogo(&g->gobuf) +// to keep running g. +TEXT runtime·mcall(SB), 7, $-4 + MOVW fn+0(FP), R0 + + // Save caller state in g->gobuf. + MOVW SP, (g_sched+gobuf_sp)(g) + MOVW LR, (g_sched+gobuf_pc)(g) + MOVW g, (g_sched+gobuf_g)(g) + + // Switch to m->g0 & its stack, call fn. + MOVW g, R1 + MOVW m_g0(m), g + CMP g, R1 + BL.EQ runtime·badmcall(SB) + MOVW (g_sched+gobuf_sp)(g), SP + SUB $8, SP + MOVW R1, 4(SP) + BL (R0) + BL runtime·badmcall2(SB) + RET + /* * support for morestack */ @@ -159,9 +182,9 @@ TEXT runtime·morestack(SB),7,$-4 // Set m->morepc to f's PC. MOVW LR, m_morepc(m) - // Call newstack on m's scheduling stack. + // Call newstack on m->g0's stack. MOVW m_g0(m), g - MOVW (m_sched+gobuf_sp)(m), SP + MOVW (g_sched+gobuf_sp)(g), SP B runtime·newstack(SB) // Called from reflection library. Mimics morestack, @@ -192,9 +215,9 @@ TEXT reflect·call(SB), 7, $-4 MOVW $1, R3 MOVW R3, m_moreframesize(m) // f's frame size - // Call newstack on m's scheduling stack. + // Call newstack on m->g0's stack. MOVW m_g0(m), g - MOVW (m_sched+gobuf_sp)(m), SP + MOVW (g_sched+gobuf_sp)(g), SP B runtime·newstack(SB) // Return point when leaving stack. @@ -203,9 +226,9 @@ TEXT runtime·lessstack(SB), 7, $-4 // Save return value in m->cret MOVW R0, m_cret(m) - // Call oldstack on m's scheduling stack. + // Call oldstack on m->g0's stack. MOVW m_g0(m), g - MOVW (m_sched+gobuf_sp)(m), SP + MOVW (g_sched+gobuf_sp)(g), SP B runtime·oldstack(SB) // void jmpdefer(fn, sp); @@ -221,6 +244,12 @@ TEXT runtime·jmpdefer(SB), 7, $0 MOVW $-4(SP), SP // SP is 4 below argp, due to saved LR B (R0) +TEXT runtime·asmcgocall(SB),7,$0 + B runtime·cgounimpl(SB) + +TEXT runtime·cgocallback(SB),7,$0 + B runtime·cgounimpl(SB) + TEXT runtime·memclr(SB),7,$20 MOVW 0(FP), R0 MOVW $0, R1 // c = 0 @@ -248,22 +277,6 @@ TEXT runtime·getcallersp(SB),7,$-4 MOVW $-4(R0), R0 RET -// runcgo(void(*fn)(void*), void *arg) -// Just call fn(arg), but first align the stack -// appropriately for the gcc ABI. -// TODO(kaib): figure out the arm-gcc ABI -TEXT runtime·runcgo(SB),7,$16 - BL runtime·abort(SB) -// MOVL fn+0(FP), AX -// MOVL arg+4(FP), BX -// MOVL SP, CX -// ANDL $~15, SP // alignment for gcc ABI -// MOVL CX, 4(SP) -// MOVL BX, 0(SP) -// CALL AX -// MOVL 4(SP), SP -// RET - TEXT runtime·emptyfunc(SB),0,$0 RET @@ -271,10 +284,6 @@ TEXT runtime·abort(SB),7,$-4 MOVW $0, R0 MOVW (R0), R1 -TEXT runtime·runcgocallback(SB),7,$0 - MOVW $0, R0 - MOVW (R0), R1 - // bool armcas(int32 *val, int32 old, int32 new) // Atomically: // if(*val == old){ |