#include <cpuid.h>
#include <linux/elf.h>
+// Newer toolchains define __get_cpuid_count in cpuid.h, but some
+// older-but-still-supported ones (e.g. gcc 5.4.0) don't, so we
+// define it locally here, following the definition in clang/lib/Headers.
+static inline int get_cpuid_count(unsigned int __leaf,
+ unsigned int __subleaf,
+ unsigned int *__eax, unsigned int *__ebx,
+ unsigned int *__ecx, unsigned int *__edx)
+{
+ unsigned int __max_leaf = __get_cpuid_max(__leaf & 0x80000000, 0);
+
+ if (__max_leaf == 0 || __max_leaf < __leaf)
+ return 0;
+
+ __cpuid_count(__leaf, __subleaf, *__eax, *__ebx, *__ecx, *__edx);
+ return 1;
+}
+
using namespace lldb_private;
using namespace lldb_private::process_linux;
return sizeof(FPR);
// Then fetch the maximum size of the area.
- if (!__get_cpuid_count(0x0d, 0, &eax, &ebx, &ecx, &edx))
+ if (!get_cpuid_count(0x0d, 0, &eax, &ebx, &ecx, &edx))
return sizeof(FPR);
return std::max<std::size_t>(ecx, sizeof(FPR));
}