From dce4bbc5d698f6dd4f80016824a9179a5d731f9f Mon Sep 17 00:00:00 2001
From: q66 <q66@chimera-linux.org>
Date: Sun, 14 Apr 2024 14:33:38 +0200
Subject: [PATCH 05/30] compiler-rt: ppc sanitizer fixes

---
 compiler-rt/cmake/base-config-ix.cmake        |  3 +-
 compiler-rt/lib/xray/xray_powerpc64.inc       | 37 +++++++++++++++++++++++-
 2 files changed, 38 insertions(+), 2 deletions(-)

--- a/compiler-rt/cmake/base-config-ix.cmake
+++ b/compiler-rt/cmake/base-config-ix.cmake
@@ -233,9 +233,10 @@ macro(test_targets)
       test_target_arch(loongarch64 "" "")
     elseif("${COMPILER_RT_DEFAULT_TARGET_ARCH}" MATCHES "powerpc64le|ppc64le")
       test_target_arch(powerpc64le "" "-m64")
+    elseif("${COMPILER_RT_DEFAULT_TARGET_ARCH}" MATCHES "powerpc64")
+      test_target_arch(powerpc64 "" "-m64")
     elseif("${COMPILER_RT_DEFAULT_TARGET_ARCH}" MATCHES "powerpc")
       test_target_arch(powerpc "" "-m32")
-      test_target_arch(powerpc64 "" "-m64")
     elseif("${COMPILER_RT_DEFAULT_TARGET_ARCH}" MATCHES "s390x")
       test_target_arch(s390x "" "")
     elseif("${COMPILER_RT_DEFAULT_TARGET_ARCH}" MATCHES "sparc")
--- a/compiler-rt/lib/xray/xray_powerpc64.inc
+++ b/compiler-rt/lib/xray/xray_powerpc64.inc
@@ -12,7 +12,7 @@
 
 #include <cstdint>
 #include <mutex>
-#ifdef __linux__
+#ifdef __GLIBC__
 #include <sys/platform/ppc.h>
 #elif defined(__FreeBSD__)
 #include <sys/types.h>
@@ -27,6 +27,13 @@ uint64_t __ppc_get_timebase_freq (void)
   sysctlbyname("kern.timecounter.tc.timebase.frequency", &tb_freq, &length, nullptr, 0);
   return tb_freq;
 }
+#else
+#include <cctype>
+#include <cstring>
+#include <cstdlib>
+
+#define __ppc_get_timebase __builtin_ppc_get_timebase
+
 #endif
 
 #include "xray_defs.h"
@@ -41,7 +48,35 @@ ALWAYS_INLINE uint64_t readTSC(uint8_t &CPU) XRAY_NEVER_INSTRUMENT {
 inline uint64_t getTSCFrequency() XRAY_NEVER_INSTRUMENT {
   static std::mutex M;
   std::lock_guard<std::mutex> Guard(M);
+#ifdef __GLIBC__
   return __ppc_get_timebase_freq();
+#else
+  /* FIXME: a less dirty implementation? */
+  static uint64_t base;
+  if (!base) {
+    FILE *f = fopen("/proc/cpuinfo", "rb");
+    if (f) {
+      ssize_t nr;
+      /* virtually always big enough to hold the line */
+      char buf[512];
+      while (fgets(buf, sizeof(buf), f)) {
+        char *ret = strstr(buf, "timebase");
+        if (!ret) {
+          continue;
+        }
+        ret += sizeof("timebase") - 1;
+        ret = strchr(ret, ':');
+        if (!ret) {
+          continue;
+        }
+        base = strtoul(ret + 1, nullptr, 10);
+        break;
+      }
+      fclose(f);
+    }
+  }
+  return base;
+#endif
 }
 
 inline bool probeRequiredCPUFeatures() XRAY_NEVER_INSTRUMENT {