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runtime: add crash stack support for mips/mipsle

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Change-Id: Ic6fcdfb6a9a912a9b1dd268836d2e5ab44d80440
GitHub-Last-Rev: dab6ecc066
GitHub-Pull-Request: golang/go#65305
Reviewed-on: https://go-review.googlesource.com/c/go/+/558698
Reviewed-by: Michael Knyszek <mknyszek@google.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Mauri de Souza Meneguzzo <mauri870@gmail.com>
This commit is contained in:
Mauri de Souza Meneguzzo 2024-05-02 19:55:54 +00:00 • committed by Cherry Mui
parent 619b419a4b
commit ff0bc4669e
3 changed files with 35 additions and 8 deletions
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4
src/runtime/asm.s
View file

@ -18,6 +18,8 @@ TEXT ·mapinitnoop<ABIInternal>(SB),NOSPLIT,$0-0
#ifndef GOARCH_amd64
#ifndef GOARCH_arm64
#ifndef GOARCH_loong64
#ifndef GOARCH_mips
#ifndef GOARCH_mipsle
#ifndef GOARCH_mips64
#ifndef GOARCH_mips64le
#ifndef GOARCH_ppc64
@ -40,3 +42,5 @@ TEXT ·switchToCrashStack0<ABIInternal>(SB),NOSPLIT,$0-0
#endif
#endif
#endif
#endif
#endif

37
src/runtime/asm_mipsx.s
View file

@ -204,6 +204,29 @@ noswitch:
ADD $4, R29
JMP (R4)
// func switchToCrashStack0(fn func())
TEXT runtime·switchToCrashStack0(SB), NOSPLIT, $0-4
MOVW fn+0(FP), REGCTXT // context register
MOVW g_m(g), R2 // curm
// set g to gcrash
MOVW $runtime·gcrash(SB), g // g = &gcrash
CALL runtime·save_g(SB)
MOVW R2, g_m(g) // g.m = curm
MOVW g, m_g0(R2) // curm.g0 = g
// switch to crashstack
MOVW (g_stack+stack_hi)(g), R2
ADDU $(-4*8), R2, R29
// call target function
MOVW 0(REGCTXT), R25
JAL (R25)
// should never return
CALL runtime·abort(SB)
UNDEF
/*
* support for morestack
*/
@ -217,6 +240,13 @@ noswitch:
// calling the scheduler calling newm calling gc), so we must
// record an argument size. For that purpose, it has no arguments.
TEXT runtime·morestack(SB),NOSPLIT|NOFRAME,$0-0
// Called from f.
// Set g->sched to context in f.
MOVW R29, (g_sched+gobuf_sp)(g)
MOVW R31, (g_sched+gobuf_pc)(g)
MOVW R3, (g_sched+gobuf_lr)(g)
MOVW REGCTXT, (g_sched+gobuf_ctxt)(g)
// Cannot grow scheduler stack (m->g0).
MOVW g_m(g), R7
MOVW m_g0(R7), R8
@ -230,13 +260,6 @@ TEXT runtime·morestack(SB),NOSPLIT|NOFRAME,$0-0
JAL runtime·badmorestackgsignal(SB)
JAL runtime·abort(SB)
// Called from f.
// Set g->sched to context in f.
MOVW R29, (g_sched+gobuf_sp)(g)
MOVW R31, (g_sched+gobuf_pc)(g)
MOVW R3, (g_sched+gobuf_lr)(g)
MOVW REGCTXT, (g_sched+gobuf_ctxt)(g)
// Called from f.
// Set m->morebuf to f's caller.
MOVW R3, (m_morebuf+gobuf_pc)(R7) // f's caller's PC

2
src/runtime/proc.go
View file

@ -578,7 +578,7 @@ func switchToCrashStack(fn func()) {
// Disable crash stack on Windows for now. Apparently, throwing an exception
// on a non-system-allocated crash stack causes EXCEPTION_STACK_OVERFLOW and
// hangs the process (see issue 63938).
const crashStackImplemented = (GOARCH == "386" || GOARCH == "amd64" || GOARCH == "arm" || GOARCH == "arm64" || GOARCH == "loong64" || GOARCH == "mips64" || GOARCH == "mips64le" || GOARCH == "ppc64" || GOARCH == "ppc64le" || GOARCH == "riscv64" || GOARCH == "s390x" || GOARCH == "wasm") && GOOS != "windows"
const crashStackImplemented = (GOARCH == "386" || GOARCH == "amd64" || GOARCH == "arm" || GOARCH == "arm64" || GOARCH == "loong64" || GOARCH == "mips" || GOARCH == "mipsle" || GOARCH == "mips64" || GOARCH == "mips64le" || GOARCH == "ppc64" || GOARCH == "ppc64le" || GOARCH == "riscv64" || GOARCH == "s390x" || GOARCH == "wasm") && GOOS != "windows"
//go:noescape
func switchToCrashStack0(fn func()) // in assembly