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runtime: support PPC32 MUSL register access 

Based on patch by Sören Tempel.

Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/397394
This commit is contained in:
Ian Lance Taylor 2022-03-31 13:05:37 -07:00
parent 58d78650da
commit 0abc1cbad1
2 changed files with 19 additions and 1 deletions
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2
gcc/go/gofrontend/MERGE
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@ -1,4 +1,4 @@
7f33baa09a8172bb2c5f1ca0435d9efe3e194c9b
45108f37070afb696b069768700e39a269f1fecb
The first line of this file holds the git revision number of the last
merge done from the gofrontend repository.

18
libgo/runtime/go-signal.c
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@ -231,7 +231,14 @@ getSiginfo(siginfo_t *info, void *context __attribute__((unused)))
#elif defined(__alpha__) && defined(__linux__)
ret.sigpc = ((ucontext_t*)(context))->uc_mcontext.sc_pc;
#elif defined(__PPC__) && defined(__linux__)
// For some reason different libc implementations use
// different names.
#if defined(__PPC64__) || defined(__GLIBC__)
ret.sigpc = ((ucontext_t*)(context))->uc_mcontext.regs->nip;
#else
// Assumed to be ppc32 musl.
ret.sigpc = ((ucontext_t*)(context))->uc_mcontext.gregs[32];
#endif
#elif defined(__PPC__) && defined(_AIX)
ret.sigpc = ((ucontext_t*)(context))->uc_mcontext.jmp_context.iar;
#elif defined(__aarch64__) && defined(__linux__)
@ -347,6 +354,7 @@ dumpregs(siginfo_t *info __attribute__((unused)), void *context __attribute__((u
mcontext_t *m = &((ucontext_t*)(context))->uc_mcontext;
int i;
#if defined(__PPC64__) || defined(__GLIBC__)
for (i = 0; i < 32; i++)
runtime_printf("r%d %X\n", i, m->regs->gpr[i]);
runtime_printf("pc %X\n", m->regs->nip);
@ -355,6 +363,16 @@ dumpregs(siginfo_t *info __attribute__((unused)), void *context __attribute__((u
runtime_printf("lr %X\n", m->regs->link);
runtime_printf("ctr %X\n", m->regs->ctr);
runtime_printf("xer %X\n", m->regs->xer);
#else
for (i = 0; i < 32; i++)
runtime_printf("r%d %X\n", i, m->gregs[i]);
runtime_printf("pc %X\n", m->gregs[32]);
runtime_printf("msr %X\n", m->gregs[33]);
runtime_printf("cr %X\n", m->gregs[38]);
runtime_printf("lr %X\n", m->gregs[36]);
runtime_printf("ctr %X\n", m->gregs[35]);
runtime_printf("xer %X\n", m->gregs[37]);
#endif
}
#elif defined(__PPC__) && defined(_AIX)
{