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runtime: add runtime changes for register ABI on s390x
This adds the changes for the register ABI in the runtime functions for s390x platform: - Add spill/unspill functions used by runtime - Add ABIInternal to functions Updates #40724 Change-Id: I6aaeec1d7293b6fec2aa489df90414937b80199e Reviewed-on: https://go-review.googlesource.com/c/go/+/719465 Reviewed-by: David Chase <drchase@google.com> Reviewed-by: Keith Randall <khr@google.com> Reviewed-by: Keith Randall <khr@golang.org> LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com> Reviewed-by: Vishwanatha HD <vishwanatha.hd@ibm.com>
This commit is contained in:
Srinivas Pokala
Keith Randall
parent
85e6080089
commit
41af98eb83
3 changed files with 109 additions and 29 deletions
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@ -160,7 +160,7 @@ nocgo:
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MOVD $0, 1(R0)
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RET
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DATA runtime·mainPC+0(SB)/8,$runtime·main(SB)
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DATA runtime·mainPC+0(SB)/8,$runtime·main<ABIInternal>(SB)
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GLOBL runtime·mainPC(SB),RODATA,$8
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TEXT runtime·breakpoint(SB),NOSPLIT|NOFRAME,$0-0
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@ -205,25 +205,29 @@ TEXT gogo<>(SB), NOSPLIT|NOFRAME, $0
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// Switch to m->g0's stack, call fn(g).
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// Fn must never return. It should gogo(&g->sched)
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// to keep running g.
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TEXT runtime·mcall(SB), NOSPLIT, $-8-8
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TEXT runtime·mcall<ABIInternal>(SB), NOSPLIT, $-8-8
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#ifdef GOEXPERIMENT_regabiargs
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MOVD R2, R12 // context
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#else
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MOVD fn+0(FP), R12 // context
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#endif
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// Save caller state in g->sched
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MOVD R15, (g_sched+gobuf_sp)(g)
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MOVD LR, (g_sched+gobuf_pc)(g)
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MOVD $0, (g_sched+gobuf_lr)(g)
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// Switch to m->g0 & its stack, call fn.
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MOVD g, R3
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MOVD g_m(g), R8
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MOVD m_g0(R8), g
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MOVD g, R2
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MOVD g_m(g), R4
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MOVD m_g0(R4), g
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BL runtime·save_g(SB)
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CMP g, R3
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CMP g, R2
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BNE 2(PC)
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BR runtime·badmcall(SB)
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MOVD fn+0(FP), R12 // context
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MOVD 0(R12), R4 // code pointer
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MOVD (g_sched+gobuf_sp)(g), R15 // sp = m->g0->sched.sp
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SUB $16, R15
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MOVD R3, 8(R15)
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MOVD R2, 8(R15)
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MOVD $0, 0(R15)
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BL (R4)
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BR runtime·badmcall2(SB)
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@ -292,18 +296,18 @@ noswitch:
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// func switchToCrashStack0(fn func())
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TEXT runtime·switchToCrashStack0<ABIInternal>(SB), NOSPLIT, $0-8
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MOVD fn+0(FP), R12 // context
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MOVD g_m(g), R4 // curm
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MOVD R2, R12 // context
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MOVD g_m(g), R2 // curm
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// set g to gcrash
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MOVD $runtime·gcrash(SB), g // g = &gcrash
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BL runtime·save_g(SB)
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MOVD R4, g_m(g) // g.m = curm
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MOVD g, m_g0(R4) // curm.g0 = g
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MOVD R2, g_m(g) // g.m = curm
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MOVD g, m_g0(R2) // curm.g0 = g
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// switch to crashstack
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MOVD (g_stack+stack_hi)(g), R4
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ADD $(-4*8), R4, R15
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MOVD (g_stack+stack_hi)(g), R2
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ADD $(-4*8), R2, R15
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// call target function
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MOVD 0(R12), R3 // code pointer
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@ -446,10 +450,14 @@ tailArgs: /* copy remaining bytes */ \
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EXRL $callfnMVC<>(SB), R5; \
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callFunction: \
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MOVD f+8(FP), R12; \
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MOVD (R12), R8; \
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MOVD regArgs+40(FP), R10; \
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BL ·unspillArgs(SB); \
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MOVD (R12), R10; \
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PCDATA $PCDATA_StackMapIndex, $0; \
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BL (R8); \
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BL (R10); \
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/* copy return values back */ \
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MOVD regArgs+40(FP), R10; \
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BL ·spillArgs(SB); \
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MOVD stackArgsType+0(FP), R7; \
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MOVD stackArgs+16(FP), R6; \
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MOVWZ stackArgsSize+24(FP), R5; \
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@ -466,11 +474,12 @@ callFunction: \
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// to reflectcallmove. It does not follow the Go ABI; it expects its
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// arguments in registers.
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TEXT callRet<>(SB), NOSPLIT, $40-0
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NO_LOCAL_POINTERS;
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MOVD R7, 8(R15)
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MOVD R6, 16(R15)
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MOVD R4, 24(R15)
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MOVD R5, 32(R15)
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MOVD $0, 40(R15)
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MOVD R10, 40(R15)
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BL runtime·reflectcallmove(SB)
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RET
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@ -754,15 +763,80 @@ TEXT runtime·cputicks(SB),NOSPLIT,$0-8
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MOVD R3, ret+0(FP)
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RET
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#ifdef GOEXPERIMENT_regabiargs
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// spillArgs stores return values from registers to a *internal/abi.RegArgs in R10.
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TEXT runtime·spillArgs(SB),NOSPLIT,$0-0
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MOVD R2, 0(R10)
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MOVD R3, 8(R10)
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MOVD R4, 16(R10)
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MOVD R5, 24(R10)
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MOVD R6, 32(R10)
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MOVD R7, 40(R10)
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MOVD R8, 48(R10)
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MOVD R9, 56(R10)
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FMOVD F0, 64(R10)
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FMOVD F1, 72(R10)
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FMOVD F2, 80(R10)
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FMOVD F3, 88(R10)
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FMOVD F4, 96(R10)
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FMOVD F5, 104(R10)
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FMOVD F6, 112(R10)
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FMOVD F7, 120(R10)
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FMOVD F8, 128(R10)
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FMOVD F9, 136(R10)
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FMOVD F10, 144(R10)
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FMOVD F11, 152(R10)
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FMOVD F12, 160(R10)
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FMOVD F13, 168(R10)
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FMOVD F14, 176(R10)
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FMOVD F15, 184(R10)
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RET
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// unspillArgs loads args into registers from a *internal/abi.RegArgs in R10.
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TEXT runtime·unspillArgs(SB),NOSPLIT,$0-0
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MOVD 0(R10), R2
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MOVD 8(R10), R3
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MOVD 16(R10), R4
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MOVD 24(R10), R5
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MOVD 32(R10), R6
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MOVD 40(R10), R7
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MOVD 48(R10), R8
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MOVD 56(R10), R9
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FMOVD 64(R10), F0
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FMOVD 72(R10), F1
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FMOVD 80(R10), F2
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FMOVD 88(R10), F3
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FMOVD 96(R10), F4
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FMOVD 104(R10), F5
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FMOVD 112(R10), F6
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FMOVD 120(R10), F7
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FMOVD 128(R10), F8
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FMOVD 136(R10), F9
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FMOVD 144(R10), F10
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FMOVD 152(R10), F11
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FMOVD 160(R10), F12
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FMOVD 168(R10), F13
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FMOVD 176(R10), F14
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FMOVD 184(R10), F15
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RET
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#else
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TEXT runtime·spillArgs(SB),NOSPLIT,$0-0
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RET
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TEXT runtime·unspillArgs(SB),NOSPLIT,$0-0
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RET
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#endif
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// AES hashing not implemented for s390x
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TEXT runtime·memhash(SB),NOSPLIT|NOFRAME,$0-32
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JMP runtime·memhashFallback(SB)
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TEXT runtime·strhash(SB),NOSPLIT|NOFRAME,$0-24
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JMP runtime·strhashFallback(SB)
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TEXT runtime·memhash32(SB),NOSPLIT|NOFRAME,$0-24
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JMP runtime·memhash32Fallback(SB)
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TEXT runtime·memhash64(SB),NOSPLIT|NOFRAME,$0-24
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JMP runtime·memhash64Fallback(SB)
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TEXT runtime·memhash<ABIInternal>(SB),NOSPLIT|NOFRAME,$0-32
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JMP runtime·memhashFallback<ABIInternal>(SB)
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TEXT runtime·strhash<ABIInternal>(SB),NOSPLIT|NOFRAME,$0-24
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JMP runtime·strhashFallback<ABIInternal>(SB)
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TEXT runtime·memhash32<ABIInternal>(SB),NOSPLIT|NOFRAME,$0-24
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JMP runtime·memhash32Fallback<ABIInternal>(SB)
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TEXT runtime·memhash64<ABIInternal>(SB),NOSPLIT|NOFRAME,$0-24
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JMP runtime·memhash64Fallback<ABIInternal>(SB)
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// Called from cgo wrappers, this function returns g->m->curg.stack.hi.
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// Must obey the gcc calling convention.
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@ -902,8 +976,7 @@ TEXT runtime·panicBounds<ABIInternal>(SB),NOSPLIT,$144-0
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// skip R14 aka LR @ 136
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// skip R15 aka SP @ 144
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MOVD R14, 8(R15) // PC immediately after call to panicBounds
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ADD $24, R15, R0 // pointer to save area
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MOVD R0, 16(R15)
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MOVD R14, R2 // PC immediately after call to panicBounds
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ADD $24, R15, R3 // pointer to save area
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CALL runtime·panicBounds64<ABIInternal>(SB)
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RET
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@ -8,6 +8,13 @@ package runtime
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func load_g()
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func save_g()
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// Used by reflectcall and the reflect package.
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//
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// Spills/loads arguments in registers to/from an internal/abi.RegArgs
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// respectively. Does not follow the Go ABI.
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func spillArgs()
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func unspillArgs()
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// getfp returns the frame pointer register of its caller or 0 if not implemented.
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// TODO: Make this a compiler intrinsic
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func getfp() uintptr { return 0 }
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@ -19,7 +19,7 @@
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//
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// If !iscgo, this is a no-op.
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//
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// NOTE: setg_gcc<> assume this clobbers only R10 and R11.
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// NOTE: setg_gcc<> and mcall assume this clobbers only R10 and R11.
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TEXT runtime·save_g(SB),NOSPLIT|NOFRAME,$0-0
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MOVB runtime·iscgo(SB), R10
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CMPBEQ R10, $0, nocgo
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