diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/lib/utils/os_utils.cpp | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/src/lib/utils/os_utils.cpp b/src/lib/utils/os_utils.cpp index 4dac4f9af..87cbcfd0f 100644 --- a/src/lib/utils/os_utils.cpp +++ b/src/lib/utils/os_utils.cpp @@ -58,10 +58,18 @@ uint64_t get_processor_timestamp() return (static_cast<uint64_t>(rtc_high) << 32) | rtc_low; } -#elif defined(BOTAN_USE_GCC_INLINE_ASM) && defined(BOTAN_TARGET_CPU_IS_PPC_FAMILY) +#elif defined(BOTAN_USE_GCC_INLINE_ASM) && defined(BOTAN_TARGET_ARCH_IS_PPC64) uint32_t rtc_low = 0, rtc_high = 0; asm volatile("mftbu %0; mftb %1" : "=r" (rtc_high), "=r" (rtc_low)); - return (static_cast<uint64_t>(rtc_high) << 32) | rtc_low; + + /* + qemu-ppc seems to not support mftb instr, it always returns zero. + If both time bases are 0, assume broken and return another clock. + */ + if(rtc_high > 0 || rtc_low > 0) + { + return (static_cast<uint64_t>(rtc_high) << 32) | rtc_low; + } #elif defined(BOTAN_USE_GCC_INLINE_ASM) && defined(BOTAN_TARGET_ARCH_IS_ALPHA) uint64_t rtc = 0; |