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| author | Joseph Myers <joseph@codesourcery.com> | 2017-06-23 20:04:23 +0000 |
|---|---|---|
| committer | Joseph Myers <joseph@codesourcery.com> | 2017-06-23 20:04:23 +0000 |
| commit | 16000c8d04f60a15fc0187e8719d741329501c39 (patch) | |
| tree | 5710ffa231ea070279974c830e6e50bb9e1c259d /sysdeps/x86 | |
| parent | 049816c3be14e47e5fe10f8cd5a38bb611d34ce5 (diff) | |
| download | glibc-16000c8d04f60a15fc0187e8719d741329501c39.tar.gz glibc-16000c8d04f60a15fc0187e8719d741329501c39.tar.xz glibc-16000c8d04f60a15fc0187e8719d741329501c39.zip | |
Avoid localplt issues from x86 fereaiseexcept inline.
Building for x86_64 with float128 support, I get a localplt test failure from lrintf128 calling feraiseexcept. The problem is that an inline optimized version of feraiseexcept calls __feraiseexcept_renamed in cases where it doesn't completely expand inline, and that in turn is redirected to feraiseexcept for a library call, so meaning the redirection of feraiseexcept to __GI_feraiseexcept inside libm is lost for that call. This patch fixes the problem by moving the redirect to an internal header in the _LIBC case, with the internal header using __GI_feraiseexcept where appropriate. Tested for x86_64 (in conjunction with float128 patches). * sysdeps/x86/fpu/bits/fenv.h [_LIBC] (__feraiseexcept_renamed): Do not declare. * sysdeps/x86/fpu/include/bits/fenv.h [_LIBC && __USE_EXTERN_INLINES] (__feraiseexcept_renamed): Declare here, redirected to __GI_feraiseexcept if [SHARED && IS_IN (libm)].
Diffstat (limited to 'sysdeps/x86')
| -rw-r--r-- | sysdeps/x86/fpu/bits/fenv.h | 2 | ||||
| -rw-r--r-- | sysdeps/x86/fpu/include/bits/fenv.h | 9 |
2 files changed, 11 insertions, 0 deletions
diff --git a/sysdeps/x86/fpu/bits/fenv.h b/sysdeps/x86/fpu/bits/fenv.h index fd7327902c..e6fcf9431b 100644 --- a/sysdeps/x86/fpu/bits/fenv.h +++ b/sysdeps/x86/fpu/bits/fenv.h @@ -120,7 +120,9 @@ femode_t; __BEGIN_DECLS /* Optimized versions. */ +#ifndef _LIBC extern int __REDIRECT_NTH (__feraiseexcept_renamed, (int), feraiseexcept); +#endif __extern_always_inline void __NTH (__feraiseexcept_invalid_divbyzero (int __excepts)) { diff --git a/sysdeps/x86/fpu/include/bits/fenv.h b/sysdeps/x86/fpu/include/bits/fenv.h index a39b6fa85d..aa61666fc3 100644 --- a/sysdeps/x86/fpu/include/bits/fenv.h +++ b/sysdeps/x86/fpu/include/bits/fenv.h @@ -17,6 +17,15 @@ <http://www.gnu.org/licenses/>. */ #ifndef _BITS_FENV_H + +#if defined _LIBC && defined __USE_EXTERN_INLINES +# if defined SHARED && IS_IN (libm) +extern int __REDIRECT_NTH (__feraiseexcept_renamed, (int), __GI_feraiseexcept); +# else +extern int __REDIRECT_NTH (__feraiseexcept_renamed, (int), feraiseexcept); +# endif +#endif + #include_next <bits/fenv.h> # ifndef _ISOMAC |