nat/x86-cpuid.h: Add x86_cpuid_count wrapper around __get_cpuid_count.

[binutils-gdb.git] / gdb / nat / x86-cpuid.h

diff --git a/gdb/nat/x86-cpuid.h b/gdb/nat/x86-cpuid.h
index 0955afba577e6030f4995c3532783e2753ffce09..517113d45e8842020a8ab83a7614aa5b6e2babcd 100644 (file)
--- 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 */