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Fix build on PPC arch with musl

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Some C libraries, notably Musl, define the regs member as a void pointer,
hence we need to use the gp_regs member instead.

Change-Id: I1ca2dbdba79a03ff81c25438c87c767d7a7cece4
Reviewed-on: https://chromium-review.googlesource.com/602327
Reviewed-by: Jaideep Bajwa <bjaideep@ca.ibm.com>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47481}
This commit is contained in:
Roberto Oliveira 2017-08-04 13:16:24 +00:00 committed by Commit Bot
parent f160520394
commit d288a87e33
1 changed files with 7 additions and 0 deletions
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7
src/libsampler/sampler.cc
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@ -450,11 +450,18 @@ void SignalHandler::FillRegisterState(void* context, RegisterState* state) {
state->sp = reinterpret_cast<void*>(mcontext.gregs[29]);
state->fp = reinterpret_cast<void*>(mcontext.gregs[30]);
#elif V8_HOST_ARCH_PPC
#if V8_LIBC_GLIBC
state->pc = reinterpret_cast<void*>(ucontext->uc_mcontext.regs->nip);
state->sp =
reinterpret_cast<void*>(ucontext->uc_mcontext.regs->gpr[PT_R1]);
state->fp =
reinterpret_cast<void*>(ucontext->uc_mcontext.regs->gpr[PT_R31]);
#else
// Some C libraries, notably Musl, define the regs member as a void pointer
state->pc = reinterpret_cast<void*>(ucontext->uc_mcontext.gp_regs[32]);
state->sp = reinterpret_cast<void*>(ucontext->uc_mcontext.gp_regs[1]);
state->fp = reinterpret_cast<void*>(ucontext->uc_mcontext.gp_regs[31]);
#endif
#elif V8_HOST_ARCH_S390
#if V8_TARGET_ARCH_32_BIT
// 31-bit target will have bit 0 (MSB) of the PSW set to denote addressing