File aarch64-hwcap-atomics.patch of Package glibc.30547

Overview Repositories Revisions Requests Users Attributes Meta

File aarch64-hwcap-atomics.patch of Package glibc.30547

2018-07-06  Szabolcs Nagy  <szabolcs.nagy@arm.com>

* sysdeps/unix/sysv/linux/aarch64/dl-procinfo.h (HWCAP_IMPORTANT): Add
	HWCAP_ATOMICS.

2018-07-06  Szabolcs Nagy  <szabolcs.nagy@arm.com>

* sysdeps/unix/sysv/linux/aarch64/cpu-features.c (init_cpu_features):
	Use dl_hwcap without masking.
	* sysdeps/unix/sysv/linux/aarch64/dl-procinfo.h (HWCAP_IMPORTANT):
	Remove HWCAP_CPUID.

Index: glibc-2.26/sysdeps/unix/sysv/linux/aarch64/cpu-features.c
===================================================================
--- glibc-2.26.orig/sysdeps/unix/sysv/linux/aarch64/cpu-features.c
+++ glibc-2.26/sysdeps/unix/sysv/linux/aarch64/cpu-features.c
@@ -47,9 +47,6 @@ get_midr_from_mcpu (const char *mcpu)
 static inline void
 init_cpu_features (struct cpu_features *cpu_features)
 {
-  uint64_t hwcap_mask = GET_HWCAP_MASK();
-  uint64_t hwcap = GLRO (dl_hwcap) & hwcap_mask;
-
   register uint64_t midr = UINT64_MAX;
 
 #if HAVE_TUNABLES
@@ -63,7 +60,7 @@ init_cpu_features (struct cpu_features *
      allows it.  */
   if (midr == UINT64_MAX)
     {
-      if (hwcap & HWCAP_CPUID)
+      if (GLRO (dl_hwcap) & HWCAP_CPUID)
 	asm volatile ("mrs %0, midr_el1" : "=r"(midr));
       else
 	midr = 0;
Index: glibc-2.26/sysdeps/unix/sysv/linux/aarch64/dl-procinfo.h
===================================================================
--- glibc-2.26.orig/sysdeps/unix/sysv/linux/aarch64/dl-procinfo.h
+++ glibc-2.26/sysdeps/unix/sysv/linux/aarch64/dl-procinfo.h
@@ -33,9 +33,8 @@
 /* Offset of the last bit allocated in HWCAP.  */
 #define _DL_HWCAP_LAST 15
 
-/* HWCAP_CPUID should be available by default to influence IFUNC as well as
-   library search.  */
-#define HWCAP_IMPORTANT HWCAP_CPUID
+/* No additional library search paths.  */
+#define HWCAP_IMPORTANT HWCAP_ATOMICS
 
 static inline const char *
 __attribute__ ((unused))

Places

File aarch64-hwcap-atomics.patch of Package glibc.30547

Places