[PATCH v6 04/15] nat/x86-cpuid.h: Add x86_cpuid_count wrapper around __get_cpuid_count.

John Baldwin
2023-07-14T15:56:09Z

---
gdb/nat/x86-cpuid.h | 32 ++++++++++++++++++++++++++++++++
1 file changed, 32 insertions(+)

diff --git a/gdb/nat/x86-cpuid.h b/gdb/nat/x86-cpuid.h
index 0955afba577..517113d45e8 100644
--- a/gdb/nat/x86-cpuid.h
+++ b/gdb/nat/x86-cpuid.h
@@ -48,6 +48,30 @@ x86_cpuid (unsigned int __level,
return __get_cpuid (__level, __eax, __ebx, __ecx, __edx);
}

+/* Return cpuid data for requested cpuid level and sub-level, as found
+ in returned eax, ebx, ecx and edx registers. The function checks
+ if cpuid is supported and returns 1 for valid cpuid information or
+ 0 for unsupported cpuid level. Pointers may be non-null. */
+
+static __inline int
+x86_cpuid_count (unsigned int __level, unsigned int __sublevel,
+ unsigned int *__eax, unsigned int *__ebx,
+ unsigned int *__ecx, unsigned int *__edx)
+{
+ unsigned int __scratch;
+
+ if (__eax == nullptr)
+ __eax = &__scratch;
+ if (__ebx == nullptr)
+ __ebx = &__scratch;
+ if (__ecx == nullptr)
+ __ecx = &__scratch;
+ if (__edx == nullptr)
+ __edx = &__scratch;
+
+ return __get_cpuid_count (__level, __sublevel, __eax, __ebx, __ecx, __edx);
+}
+
#else

static __inline int
@@ -58,6 +82,14 @@ x86_cpuid (unsigned int __level,
return 0;
}

+static __inline int
+x86_cpuid_count (unsigned int __level, unsigned int __sublevel,
+ unsigned int *__eax, unsigned int *__ebx,
+ unsigned int *__ecx, unsigned int *__edx)
+{
+ return 0;
+}
+
#endif /* i386 && x86_64 */

#endif /* NAT_X86_CPUID_H */
--
2.40.0