1An all-in-one patch that fixes several issues:
2
31) UnscaledCycleClock not fully implemented for ppc*-musl (disabled on musl)
42) powerpc stacktrace implementation only works on glibc (disabled on musl)
53) powerpc stacktrace implementation has ppc64 assumptions (fixed)
64) examine_stack.cpp makes glibc assumptions on powerpc (fixed)
7
8Sourced from void linux
9
10Signed-off-by: Khem Raj <raj.khem@gmail.com>
11
12--- a/absl/base/internal/unscaledcycleclock.cc
13+++ b/absl/base/internal/unscaledcycleclock.cc
14@@ -20,7 +20,7 @@
15 #include <intrin.h>
16 #endif
17
18-#if defined(__powerpc__) || defined(__ppc__)
19+#if (defined(__powerpc__) || defined(__ppc__)) && defined(__GLIBC__)
20 #ifdef __GLIBC__
21 #include <sys/platform/ppc.h>
22 #elif defined(__FreeBSD__)
23@@ -53,7 +53,7 @@ double UnscaledCycleClock::Frequency() {
24   return base_internal::NominalCPUFrequency();
25 }
26
27-#elif defined(__powerpc__) || defined(__ppc__)
28+#elif (defined(__powerpc__) || defined(__ppc__)) && defined(__GLIBC__)
29
30 int64_t UnscaledCycleClock::Now() {
31 #ifdef __GLIBC__
32--- a/absl/base/internal/unscaledcycleclock.h
33+++ b/absl/base/internal/unscaledcycleclock.h
34@@ -46,7 +46,8 @@
35
36 // The following platforms have an implementation of a hardware counter.
37 #if defined(__i386__) || defined(__x86_64__) || defined(__aarch64__) || \
38-    defined(__powerpc__) || defined(__ppc__) || defined(__riscv) ||     \
39+    ((defined(__powerpc__) || defined(__ppc__)) && defined(__GLIBC__)) || \
40+    defined(__riscv) ||     \
41     defined(_M_IX86) || (defined(_M_X64) && !defined(_M_ARM64EC))
42 #define ABSL_HAVE_UNSCALED_CYCLECLOCK_IMPLEMENTATION 1
43 #else
44--- a/absl/debugging/internal/examine_stack.cc
45+++ b/absl/debugging/internal/examine_stack.cc
46@@ -33,6 +33,10 @@
47 #include <csignal>
48 #include <cstdio>
49
50+#if defined(__powerpc__)
51+#include <asm/ptrace.h>
52+#endif
53+
54 #include "absl/base/attributes.h"
55 #include "absl/base/internal/raw_logging.h"
56 #include "absl/base/macros.h"
57@@ -174,8 +178,10 @@ void* GetProgramCounter(void* const vuc) {
58     return reinterpret_cast<void*>(context->uc_mcontext.pc);
59 #elif defined(__powerpc64__)
60     return reinterpret_cast<void*>(context->uc_mcontext.gp_regs[32]);
61-#elif defined(__powerpc__)
62+#elif defined(__powerpc__) && defined(__GLIBC__)
63     return reinterpret_cast<void*>(context->uc_mcontext.uc_regs->gregs[32]);
64+#elif defined(__powerpc__)
65+    return reinterpret_cast<void*>((context->uc_regs)->gregs[32]);
66 #elif defined(__riscv)
67     return reinterpret_cast<void*>(context->uc_mcontext.__gregs[REG_PC]);
68 #elif defined(__s390__) && !defined(__s390x__)
69--- a/absl/debugging/internal/stacktrace_config.h
70+++ b/absl/debugging/internal/stacktrace_config.h
71@@ -60,7 +60,7 @@
72 #elif defined(__i386__) || defined(__x86_64__)
73 #define ABSL_STACKTRACE_INL_HEADER \
74   "absl/debugging/internal/stacktrace_x86-inl.inc"
75-#elif defined(__ppc__) || defined(__PPC__)
76+#elif (defined(__ppc__) || defined(__PPC__)) && defined(__GLIBC__)
77 #define ABSL_STACKTRACE_INL_HEADER \
78   "absl/debugging/internal/stacktrace_powerpc-inl.inc"
79 #elif defined(__aarch64__)
80