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An all-in-one patch that fixes several issues:
1) UnscaledCycleClock not fully implemented for ppc*-musl (disabled on musl)
2) powerpc stacktrace implementation only works on glibc (disabled on musl)
3) powerpc stacktrace implementation has ppc64 assumptions (fixed)
4) examine_stack.cpp makes glibc assumptions on powerpc (fixed)
Sourced from void linux
Signed-off-by: Khem Raj <raj.khem@gmail.com>
--- a/absl/base/internal/unscaledcycleclock.cc
+++ b/absl/base/internal/unscaledcycleclock.cc
@@ -20,7 +20,7 @@
#include <intrin.h>
#endif
-#if defined(__powerpc__) || defined(__ppc__)
+#if (defined(__powerpc__) || defined(__ppc__)) && defined(__GLIBC__)
#ifdef __GLIBC__
#include <sys/platform/ppc.h>
#elif defined(__FreeBSD__)
@@ -59,7 +59,7 @@ double UnscaledCycleClock::Frequency() {
return base_internal::NominalCPUFrequency();
}
-#elif defined(__powerpc__) || defined(__ppc__)
+#elif (defined(__powerpc__) || defined(__ppc__)) && defined(__GLIBC__)
int64_t UnscaledCycleClock::Now() {
#ifdef __GLIBC__
--- a/absl/base/internal/unscaledcycleclock.h
+++ b/absl/base/internal/unscaledcycleclock.h
@@ -46,7 +46,7 @@
// The following platforms have an implementation of a hardware counter.
#if defined(__i386__) || defined(__x86_64__) || defined(__aarch64__) || \
- defined(__powerpc__) || defined(__ppc__) || \
+ ((defined(__powerpc__) || defined(__ppc__)) && defined(__GLIBC__)) || \
defined(_M_IX86) || defined(_M_X64)
#define ABSL_HAVE_UNSCALED_CYCLECLOCK_IMPLEMENTATION 1
#else
--- a/absl/debugging/internal/examine_stack.cc
+++ b/absl/debugging/internal/examine_stack.cc
@@ -27,6 +27,10 @@
#include <csignal>
#include <cstdio>
+#if defined(__powerpc__)
+#include <asm/ptrace.h>
+#endif
+
#include "absl/base/attributes.h"
#include "absl/base/internal/raw_logging.h"
#include "absl/base/macros.h"
@@ -55,8 +59,10 @@ void* GetProgramCounter(void* vuc) {
return reinterpret_cast<void*>(context->uc_mcontext.pc);
#elif defined(__powerpc64__)
return reinterpret_cast<void*>(context->uc_mcontext.gp_regs[32]);
-#elif defined(__powerpc__)
+#elif defined(__powerpc__) && defined(__GLIBC__)
return reinterpret_cast<void*>(context->uc_mcontext.regs->nip);
+#elif defined(__powerpc__)
+ return reinterpret_cast<void*>(((struct pt_regs *)context->uc_regs)->nip);
#elif defined(__riscv)
return reinterpret_cast<void*>(context->uc_mcontext.__gregs[REG_PC]);
#elif defined(__s390__) && !defined(__s390x__)
--- a/absl/debugging/internal/stacktrace_config.h
+++ b/absl/debugging/internal/stacktrace_config.h
@@ -64,7 +64,7 @@
#elif defined(__i386__) || defined(__x86_64__)
#define ABSL_STACKTRACE_INL_HEADER \
"absl/debugging/internal/stacktrace_x86-inl.inc"
-#elif defined(__ppc__) || defined(__PPC__)
+#elif (defined(__ppc__) || defined(__PPC__)) && defined(__GLIBC__)
#define ABSL_STACKTRACE_INL_HEADER \
"absl/debugging/internal/stacktrace_powerpc-inl.inc"
#elif defined(__aarch64__)
--- a/absl/debugging/internal/stacktrace_powerpc-inl.inc
+++ b/absl/debugging/internal/stacktrace_powerpc-inl.inc
@@ -130,8 +130,13 @@ static void **NextStackFrame(void **old_
StacktracePowerPCGetLR(new_sp) == kernel_sigtramp_rt64_address) {
const ucontext_t* signal_context =
reinterpret_cast<const ucontext_t*>(uc);
+#if defined(__powerpc64__)
void **const sp_before_signal =
reinterpret_cast<void**>(signal_context->uc_mcontext.gp_regs[PT_R1]);
+#else
+ void **const sp_before_signal =
+ reinterpret_cast<void**>(signal_context->uc_mcontext.uc_regs->gregs[PT_R1]);
+#endif
// Check that alleged sp before signal is nonnull and is reasonably
// aligned.
if (sp_before_signal != nullptr &&
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