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| author | H.J. Lu <hjl.tools@gmail.com> | 2017-09-11 08:18:11 -0700 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2017-09-11 08:18:32 -0700 |
| commit | 45ff34638f034877b6a490c217d6a0632ce263f4 (patch) | |
| tree | dae86b84c59ccbc77c2d9d46403fee6ad3f29f20 /sysdeps/x86/dl-hwcap.h | |
| parent | 891abfd3c088c4bbfe724ff5bcfb9fca35db6d7d (diff) | |
| download | glibc-45ff34638f034877b6a490c217d6a0632ce263f4.zip glibc-45ff34638f034877b6a490c217d6a0632ce263f4.tar.gz glibc-45ff34638f034877b6a490c217d6a0632ce263f4.tar.bz2 | |
x86: Add x86_64 to x86-64 HWCAP [BZ #22093]
Before glibc 2.26, ld.so set dl_platform to "x86_64" and searched the
"x86_64" subdirectory when loading a shared library. ld.so in glibc
2.26 was changed to set dl_platform to "haswell" or "xeon_phi", based
on supported ISAs. This led to shared library loading failure for
shared libraries placed under the "x86_64" subdirectory.
This patch adds "x86_64" to x86-64 dl_hwcap so that ld.so will always
search the "x86_64" subdirectory when loading a shared library.
NB: We can't set x86-64 dl_platform to "x86-64" since ld.so will skip
the "haswell" and "xeon_phi" subdirectories on "haswell" and "xeon_phi"
machines.
Tested on i686 and x86-64.
[BZ #22093]
* sysdeps/x86/cpu-features.c (init_cpu_features): Initialize
GLRO(dl_hwcap) to HWCAP_X86_64 for x86-64.
* sysdeps/x86/dl-hwcap.h (HWCAP_COUNT): Updated.
(HWCAP_IMPORTANT): Likewise.
(HWCAP_X86_64): New enum.
(HWCAP_X86_AVX512_1): Updated.
* sysdeps/x86/dl-procinfo.c (_dl_x86_hwcap_flags): Add "x86_64".
* sysdeps/x86_64/Makefile (tests): Add tst-x86_64-1.
(modules-names): Add x86_64/tst-x86_64mod-1.
(LDFLAGS-tst-x86_64mod-1.so): New.
($(objpfx)tst-x86_64-1): Likewise.
($(objpfx)x86_64/tst-x86_64mod-1.os): Likewise.
(tst-x86_64-1-clean): Likewise.
* sysdeps/x86_64/tst-x86_64-1.c: New file.
* sysdeps/x86_64/tst-x86_64mod-1.c: Likewise.
Diffstat (limited to 'sysdeps/x86/dl-hwcap.h')
| -rw-r--r-- | sysdeps/x86/dl-hwcap.h | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/sysdeps/x86/dl-hwcap.h b/sysdeps/x86/dl-hwcap.h index c956684..38627e9 100644 --- a/sysdeps/x86/dl-hwcap.h +++ b/sysdeps/x86/dl-hwcap.h @@ -24,15 +24,16 @@ # define HWCAP_PLATFORMS_START 0 # define HWCAP_PLATFORMS_COUNT 4 # define HWCAP_START 0 -# define HWCAP_COUNT 2 -# define HWCAP_IMPORTANT (HWCAP_X86_SSE2 | HWCAP_X86_AVX512_1) +# define HWCAP_COUNT 3 +# define HWCAP_IMPORTANT \ + (HWCAP_X86_SSE2 | HWCAP_X86_64 | HWCAP_X86_AVX512_1) #elif defined __x86_64__ /* For 64 bit, only cover x86-64 platforms and capabilities. */ # define HWCAP_PLATFORMS_START 2 # define HWCAP_PLATFORMS_COUNT 4 # define HWCAP_START 1 -# define HWCAP_COUNT 2 -# define HWCAP_IMPORTANT (HWCAP_X86_AVX512_1) +# define HWCAP_COUNT 3 +# define HWCAP_IMPORTANT (HWCAP_X86_64 | HWCAP_X86_AVX512_1) #else /* For 32 bit, only cover i586, i686 and SSE2. */ # define HWCAP_PLATFORMS_START 0 @@ -45,7 +46,8 @@ enum { HWCAP_X86_SSE2 = 1 << 0, - HWCAP_X86_AVX512_1 = 1 << 1 + HWCAP_X86_64 = 1 << 1, + HWCAP_X86_AVX512_1 = 1 << 2 }; static inline const char * |