From 11bf8ce1d6c28b4758cedeaea9558f6a071fe7d8 Mon Sep 17 00:00:00 2001 From: Ulrich Drepper Date: Tue, 22 Jul 2003 22:28:07 +0000 Subject: Update. 2003-07-22 H.J. Lu * elf/dl-support.c (_dl_hwcap): New variable. (_dl_aux_init): Initialize GL(dl_hwcap) for static binaries. * sysdeps/i386/fpu/fclrexcpt.c: Include , and . (__feclearexcept): Clear MXCSR if needed. * sysdeps/i386/fpu/fsetexcptflg.c: Likewise. * sysdeps/i386/fpu_control.h (_FPU_GETCW, _FPU_SETCW): Document that newer hardware needs more than these macros. * sysdeps/i386/setfpucw.c: New file. 2003-07-22 Jakub Jelinek * elf/Makefile (CFLAGS-ldconfig.c): Define IS_IN_ldconfig. * elf/ldconfig.c: Include dl-procinfo.c. (PROCINFO_CLASS): Define. * sysdeps/generic/ldsodefs.h (PROCINFO_CLASS): Define. * sysdeps/unix/sysv/linux/x86_64/dl-procinfo.c: New file. * sysdeps/unix/sysv/linux/x86_64/dl-procinfo.h: New file. * sysdeps/unix/sysv/linux/i386/dl-procinfo.c (PROCINFO_CLASS): Define if not yet defined. Use it instead of EXTERN. Undefine at the end of the file. * sysdeps/unix/sysv/linux/arm/dl-procinfo.c (PROCINFO_CLASS): Likewise. * sysdeps/unix/sysv/linux/sparc/sparc32/dl-procinfo.c (PROCINFO_CLASS): Likewise. * sysdeps/unix/sysv/linux/sparc/sparc64/dl-procinfo.c (PROCINFO_CLASS): Likewise. 2003-07-22 H.J. Lu * elf/ldconfig.c (main): Issue a fatal error if relative path is used to build cache. 2003-07-22 Ulrich Drepper * elf/readlib.c (process_file): Avoid possible overflow in assignment. --- sysdeps/generic/ldsodefs.h | 1 + sysdeps/i386/fpu/fclrexcpt.c | 18 +++++++ sysdeps/i386/fpu/fsetexcptflg.c | 19 ++++++++ sysdeps/i386/fpu_control.h | 8 +++- sysdeps/i386/setfpucw.c | 55 ++++++++++++++++++++++ sysdeps/unix/sysv/linux/arm/dl-procinfo.c | 10 ++-- sysdeps/unix/sysv/linux/i386/dl-procinfo.c | 13 +++-- .../unix/sysv/linux/sparc/sparc32/dl-procinfo.c | 10 ++-- .../unix/sysv/linux/sparc/sparc64/dl-procinfo.c | 10 ++-- sysdeps/unix/sysv/linux/x86_64/dl-procinfo.c | 5 ++ sysdeps/unix/sysv/linux/x86_64/dl-procinfo.h | 5 ++ 11 files changed, 133 insertions(+), 21 deletions(-) create mode 100644 sysdeps/i386/setfpucw.c create mode 100644 sysdeps/unix/sysv/linux/x86_64/dl-procinfo.c create mode 100644 sysdeps/unix/sysv/linux/x86_64/dl-procinfo.h (limited to 'sysdeps') diff --git a/sysdeps/generic/ldsodefs.h b/sysdeps/generic/ldsodefs.h index 2a3cf2bd09..570b52261b 100644 --- a/sysdeps/generic/ldsodefs.h +++ b/sysdeps/generic/ldsodefs.h @@ -343,6 +343,7 @@ struct rtld_global /* Get architecture specific definitions. */ #define PROCINFO_DECL +#define PROCINFO_CLASS EXTERN #include /* Structure describing the dynamic linker itself. */ diff --git a/sysdeps/i386/fpu/fclrexcpt.c b/sysdeps/i386/fpu/fclrexcpt.c index c3e7c3ed48..f7ccd3acf6 100644 --- a/sysdeps/i386/fpu/fclrexcpt.c +++ b/sysdeps/i386/fpu/fclrexcpt.c @@ -19,6 +19,9 @@ 02111-1307 USA. */ #include +#include +#include +#include int __feclearexcept (int excepts) @@ -38,6 +41,21 @@ __feclearexcept (int excepts) /* Put the new data in effect. */ __asm__ ("fldenv %0" : : "m" (*&temp)); + /* If the CPU supports SSE, we clear the MXCSR as well. */ + if ((GL(dl_hwcap) & HWCAP_I386_XMM) != 0) + { + unsigned int xnew_exc; + + /* Get the current MXCSR. */ + __asm__ ("stmxcsr %0" : "=m" (*&xnew_exc)); + + /* Clear the relevant bits. */ + xnew_exc &= excepts ^ FE_ALL_EXCEPT; + + /* Put the new data in effect. */ + __asm__ ("ldmxcsr %0" : : "m" (*&xnew_exc)); + } + /* Success. */ return 0; } diff --git a/sysdeps/i386/fpu/fsetexcptflg.c b/sysdeps/i386/fpu/fsetexcptflg.c index 2bfc736054..d262738b68 100644 --- a/sysdeps/i386/fpu/fsetexcptflg.c +++ b/sysdeps/i386/fpu/fsetexcptflg.c @@ -21,6 +21,9 @@ #include #include #include +#include +#include +#include int __fesetexceptflag (const fexcept_t *flagp, int excepts) @@ -39,6 +42,22 @@ __fesetexceptflag (const fexcept_t *flagp, int excepts) the next floating-point instruction. */ __asm__ ("fldenv %0" : : "m" (*&temp)); + /* If the CPU supports SSE, we set the MXCSR as well. */ + if ((GL(dl_hwcap) & HWCAP_I386_XMM) != 0) + { + unsigned int xnew_exc; + + /* Get the current MXCSR. */ + __asm__ ("stmxcsr %0" : "=m" (*&xnew_exc)); + + /* Set the relevant bits. */ + xnew_exc &= ~(excepts & FE_ALL_EXCEPT); + xnew_exc |= *flagp & excepts & FE_ALL_EXCEPT; + + /* Put the new data in effect. */ + __asm__ ("ldmxcsr %0" : : "m" (*&xnew_exc)); + } + /* Success. */ return 0; } diff --git a/sysdeps/i386/fpu_control.h b/sysdeps/i386/fpu_control.h index ed9bf388a8..e2d00467b7 100644 --- a/sysdeps/i386/fpu_control.h +++ b/sysdeps/i386/fpu_control.h @@ -1,5 +1,5 @@ /* FPU control word bits. i387 version. - Copyright (C) 1993,1995,1996,1997,1998,2000,2001 Free Software Foundation, Inc. + Copyright (C) 1993,1995-1998,2000,2001,2003 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Olaf Flebbe. @@ -88,7 +88,11 @@ /* Type of the control word. */ typedef unsigned int fpu_control_t __attribute__ ((__mode__ (__HI__))); -/* Macros for accessing the hardware control word. */ +/* Macros for accessing the hardware control word. + + Note that the use of these macros is no sufficient anymore with + recent hardware. Some floating point operations are executed in + the SSE/SSE2 engines which have their own control and status register. */ #define _FPU_GETCW(cw) __asm__ ("fnstcw %0" : "=m" (*&cw)) #define _FPU_SETCW(cw) __asm__ ("fldcw %0" : : "m" (*&cw)) diff --git a/sysdeps/i386/setfpucw.c b/sysdeps/i386/setfpucw.c new file mode 100644 index 0000000000..0a6af25ddf --- /dev/null +++ b/sysdeps/i386/setfpucw.c @@ -0,0 +1,55 @@ +/* Set the FPU control word for x86. + Copyright (C) 2003 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include +#include +#include +#include +#include +#include + +void +__setfpucw (fpu_control_t set) +{ + fpu_control_t cw; + + /* Fetch the current control word. */ + __asm__ ("fnstcw %0" : "=m" (*&cw)); + + /* Preserve the reserved bits, and set the rest as the user + specified (or the default, if the user gave zero). */ + cw &= _FPU_RESERVED; + cw |= set & ~_FPU_RESERVED; + + __asm__ ("fldcw %0" : : "m" (*&cw)); + + /* If the CPU supports SSE, we set the MXCSR as well. */ + if ((GL(dl_hwcap) & HWCAP_I386_XMM) != 0) + { + unsigned int xnew_exc; + + /* Get the current MXCSR. */ + __asm__ ("stmxcsr %0" : "=m" (*&xnew_exc)); + + xnew_exc &= ~((0xc00 << 3) | (FE_ALL_EXCEPT << 7)); + xnew_exc |= ((set & 0xc00) << 3) | ((set & FE_ALL_EXCEPT) << 7); + + __asm__ ("ldmxcsr %0" : : "m" (*&xnew_exc)); + } +} diff --git a/sysdeps/unix/sysv/linux/arm/dl-procinfo.c b/sysdeps/unix/sysv/linux/arm/dl-procinfo.c index 9acd07962b..9b87a2003d 100644 --- a/sysdeps/unix/sysv/linux/arm/dl-procinfo.c +++ b/sysdeps/unix/sysv/linux/arm/dl-procinfo.c @@ -1,5 +1,5 @@ /* Data for Linux/ARM version of processor capability information. - Copyright (C) 2001, 2002 Free Software Foundation, Inc. + Copyright (C) 2001, 2002, 2003 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Philip Blundell , 2001. @@ -40,13 +40,14 @@ needed. */ -#ifdef PROCINFO_DECL -EXTERN +#ifndef PROCINFO_CLASS +#define PROCINFO_CLASS #endif + #if !defined PROCINFO_DECL && defined SHARED ._dl_arm_cap_flags #else -const char _dl_arm_cap_flags[8][10] +PROCINFO_CLASS const char _dl_arm_cap_flags[8][10] #endif #ifndef PROCINFO_DECL = { @@ -60,3 +61,4 @@ const char _dl_arm_cap_flags[8][10] #endif #undef PROCINFO_DECL +#undef PROCINFO_CLASS diff --git a/sysdeps/unix/sysv/linux/i386/dl-procinfo.c b/sysdeps/unix/sysv/linux/i386/dl-procinfo.c index 1631c6504b..3b1f9bb25e 100644 --- a/sysdeps/unix/sysv/linux/i386/dl-procinfo.c +++ b/sysdeps/unix/sysv/linux/i386/dl-procinfo.c @@ -40,13 +40,14 @@ needed. */ -#ifdef PROCINFO_DECL -EXTERN +#ifndef PROCINFO_CLASS +#define PROCINFO_CLASS #endif + #if !defined PROCINFO_DECL && defined SHARED ._dl_x86_cap_flags #else -const char _dl_x86_cap_flags[32][8] +PROCINFO_CLASS const char _dl_x86_cap_flags[32][8] #endif #ifndef PROCINFO_DECL = { @@ -62,13 +63,10 @@ const char _dl_x86_cap_flags[32][8] , #endif -#ifdef PROCINFO_DECL -EXTERN -#endif #if !defined PROCINFO_DECL && defined SHARED ._dl_x86_platforms #else -const char _dl_x86_platforms[4][5] +PROCINFO_CLASS const char _dl_x86_platforms[4][5] #endif #ifndef PROCINFO_DECL = { @@ -82,3 +80,4 @@ const char _dl_x86_platforms[4][5] #endif #undef PROCINFO_DECL +#undef PROCINFO_CLASS diff --git a/sysdeps/unix/sysv/linux/sparc/sparc32/dl-procinfo.c b/sysdeps/unix/sysv/linux/sparc/sparc32/dl-procinfo.c index 30d0084c0c..e9042d9717 100644 --- a/sysdeps/unix/sysv/linux/sparc/sparc32/dl-procinfo.c +++ b/sysdeps/unix/sysv/linux/sparc/sparc32/dl-procinfo.c @@ -1,5 +1,5 @@ /* Data for Linux/sparc32 version of processor capability information. - Copyright (C) 2002 Free Software Foundation, Inc. + Copyright (C) 2002, 2003 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Jakub Jelinek , 2002. @@ -40,13 +40,14 @@ needed. */ -#ifdef PROCINFO_DECL -EXTERN +#ifndef PROCINFO_CLASS +#define PROCINFO_CLASS #endif + #if !defined PROCINFO_DECL && defined SHARED ._dl_sparc32_cap_flags #else -const char _dl_sparc32_cap_flags[6][7] +PROCINFO_CLASS const char _dl_sparc32_cap_flags[6][7] #endif #ifndef PROCINFO_DECL = { @@ -60,3 +61,4 @@ const char _dl_sparc32_cap_flags[6][7] #endif #undef PROCINFO_DECL +#undef PROCINFO_CLASS diff --git a/sysdeps/unix/sysv/linux/sparc/sparc64/dl-procinfo.c b/sysdeps/unix/sysv/linux/sparc/sparc64/dl-procinfo.c index 43c96589e5..0a453a6811 100644 --- a/sysdeps/unix/sysv/linux/sparc/sparc64/dl-procinfo.c +++ b/sysdeps/unix/sysv/linux/sparc/sparc64/dl-procinfo.c @@ -1,5 +1,5 @@ /* Data for Linux/sparc64 version of processor capability information. - Copyright (C) 2002 Free Software Foundation, Inc. + Copyright (C) 2002, 2003 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Jakub Jelinek , 2002. @@ -40,13 +40,14 @@ needed. */ -#ifdef PROCINFO_DECL -EXTERN +#ifndef PROCINFO_CLASS +#define PROCINFO_CLASS #endif + #if !defined PROCINFO_DECL && defined SHARED ._dl_sparc64_cap_flags #else -const char _dl_sparc64_cap_flags[6][7] +PROCINFO_CLASS const char _dl_sparc64_cap_flags[6][7] #endif #ifndef PROCINFO_DECL = { @@ -60,3 +61,4 @@ const char _dl_sparc64_cap_flags[6][7] #endif #undef PROCINFO_DECL +#undef PROCINFO_CLASS diff --git a/sysdeps/unix/sysv/linux/x86_64/dl-procinfo.c b/sysdeps/unix/sysv/linux/x86_64/dl-procinfo.c new file mode 100644 index 0000000000..ec9c4a7eb7 --- /dev/null +++ b/sysdeps/unix/sysv/linux/x86_64/dl-procinfo.c @@ -0,0 +1,5 @@ +#ifdef IS_IN_ldconfig +#include +#else +#include +#endif diff --git a/sysdeps/unix/sysv/linux/x86_64/dl-procinfo.h b/sysdeps/unix/sysv/linux/x86_64/dl-procinfo.h new file mode 100644 index 0000000000..b360b4288a --- /dev/null +++ b/sysdeps/unix/sysv/linux/x86_64/dl-procinfo.h @@ -0,0 +1,5 @@ +#ifdef IS_IN_ldconfig +#include +#else +#include +#endif -- cgit 1.4.1