glibc/SOURCES/glibc-rh1817513-123.patch

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2021-04-23 04:11:25 +00:00
commit 93fda28693f0d9060b0aa71eeacaacfe9f16896e
Author: H.J. Lu <hjl.tools@gmail.com>
Date: Thu Dec 3 15:02:44 2020 -0800
x86: Adjust tst-cpu-features-supports.c for GCC 11
Check HAS_CPU_FEATURE instead of CPU_FEATURE_USABLE for FSGSBASE, IBT,
LM, SHSTK and XSAVES since FSGSBASE requires kernel support, IBT/SHSTK/LM
require OS support and XSAVES is supervisor-mode only.
diff --git a/sysdeps/x86/tst-cpu-features-supports.c b/sysdeps/x86/tst-cpu-features-supports.c
index bf881b531f4bc2ed..287cf01fbdfaeda1 100644
--- a/sysdeps/x86/tst-cpu-features-supports.c
+++ b/sysdeps/x86/tst-cpu-features-supports.c
@@ -40,6 +40,11 @@ check_supports (int supports, int usable, const char *supports_name,
#define CHECK_SUPPORTS(str, name) \
check_supports (__builtin_cpu_supports (#str), \
CPU_FEATURE_USABLE (name), \
+ #str, "CPU_FEATURE_USABLE (" #name ")");
+
+#define CHECK_CPU_SUPPORTS(str, name) \
+ check_supports (__builtin_cpu_supports (#str), \
+ HAS_CPU_FEATURE (name), \
#str, "HAS_CPU_FEATURE (" #name ")");
static int
@@ -118,7 +123,7 @@ do_test (int argc, char **argv)
fails += CHECK_SUPPORTS (fma4, FMA4);
#endif
#if __GNUC_PREREQ (11, 0)
- fails += CHECK_SUPPORTS (fsgsbase, FSGSBASE);
+ fails += CHECK_CPU_SUPPORTS (fsgsbase, FSGSBASE);
fails += CHECK_SUPPORTS (fxsave, FXSR);
#endif
#if __GNUC_PREREQ (8, 0)
@@ -126,9 +131,9 @@ do_test (int argc, char **argv)
#endif
#if __GNUC_PREREQ (11, 0)
fails += CHECK_SUPPORTS (hle, HLE);
- fails += CHECK_SUPPORTS (ibt, IBT);
+ fails += CHECK_CPU_SUPPORTS (ibt, IBT);
fails += CHECK_SUPPORTS (lahf_lm, LAHF64_SAHF64);
- fails += CHECK_SUPPORTS (lm, LM);
+ fails += CHECK_CPU_SUPPORTS (lm, LM);
fails += CHECK_SUPPORTS (lwp, LWP);
fails += CHECK_SUPPORTS (lzcnt, LZCNT);
#endif
@@ -150,7 +155,7 @@ do_test (int argc, char **argv)
fails += CHECK_SUPPORTS (rtm, RTM);
fails += CHECK_SUPPORTS (serialize, SERIALIZE);
fails += CHECK_SUPPORTS (sha, SHA);
- fails += CHECK_SUPPORTS (shstk, SHSTK);
+ fails += CHECK_CPU_SUPPORTS (shstk, SHSTK);
#endif
fails += CHECK_SUPPORTS (sse, SSE);
fails += CHECK_SUPPORTS (sse2, SSE2);
@@ -180,7 +185,7 @@ do_test (int argc, char **argv)
fails += CHECK_SUPPORTS (xsave, XSAVE);
fails += CHECK_SUPPORTS (xsavec, XSAVEC);
fails += CHECK_SUPPORTS (xsaveopt, XSAVEOPT);
- fails += CHECK_SUPPORTS (xsaves, XSAVES);
+ fails += CHECK_CPU_SUPPORTS (xsaves, XSAVES);
#endif
printf ("%d differences between __builtin_cpu_supports and glibc code.\n",