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| author | H.J. Lu <hjl.tools@gmail.com> | 2017-06-15 08:56:48 -0700 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2017-06-15 08:56:59 -0700 |
| commit | 9ed0aa15d316fb30e056d3a2e8f3361460c67e78 (patch) | |
| tree | 202758d5e45fbb9093bfbb3fbf442f25417f9da1 /sysdeps/x86_64/multiarch/Makefile | |
| parent | b91a52d0d77d8c532d2cfa13be0db92faa397c4b (diff) | |
| download | glibc-9ed0aa15d316fb30e056d3a2e8f3361460c67e78.tar.gz glibc-9ed0aa15d316fb30e056d3a2e8f3361460c67e78.tar.xz glibc-9ed0aa15d316fb30e056d3a2e8f3361460c67e78.zip | |
x86-64: Implement strcat family IFUNC selectors in C
Implement strcat family IFUNC selectors in C. All internal calls within libc.so can use IFUNC on x86-64 since unlike x86, x86-64 supports PC-relative addressing to access the GOT entry so that it can call via PLT without using an extra register. For libc.a, we can't use IFUNC for functions which are called before IFUNC has been initialized. Use IFUNC internally reduces the icache footprint since libc.so and other codes in the process use the same implementations. This patch uses IFUNC for strcat family functions within libc. * sysdeps/x86_64/multiarch/Makefile (sysdep_routines): Add strcat-sse2. * sysdeps/x86_64/multiarch/strcat-sse2.S: New file. * sysdeps/x86_64/multiarch/strcat.c: Likewise. * sysdeps/x86_64/multiarch/strncat.c: Likewise. * sysdeps/x86_64/multiarch/strcat.S: Removed. * sysdeps/x86_64/multiarch/strncat.S: Likewise.
Diffstat (limited to 'sysdeps/x86_64/multiarch/Makefile')
| -rw-r--r-- | sysdeps/x86_64/multiarch/Makefile | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/sysdeps/x86_64/multiarch/Makefile b/sysdeps/x86_64/multiarch/Makefile index ff6c7f43de..43443b303c 100644 --- a/sysdeps/x86_64/multiarch/Makefile +++ b/sysdeps/x86_64/multiarch/Makefile @@ -23,6 +23,7 @@ sysdep_routines += strncat-c stpncpy-c strncpy-c strcmp-ssse3 \ strcpy-ssse3 strncpy-ssse3 stpcpy-ssse3 stpncpy-ssse3 \ strcpy-sse2-unaligned strncpy-sse2-unaligned \ stpcpy-sse2-unaligned stpncpy-sse2-unaligned \ + strcat-sse2 \ strcat-sse2-unaligned strncat-sse2-unaligned \ strchr-sse2-no-bsf memcmp-ssse3 strstr-sse2-unaligned \ strcspn-c strpbrk-c strspn-c varshift \ |