[uclibc-ng-devel] uClibc-ng - small C library for embedded systems branch master updated. 1d81dc5276b78a6f893c35ffd80bbf331d4f0833

This is an automated email from the git hooks/post-receive script. It was generated because a ref change was pushed to the repository containing the project "uClibc-ng - small C library for embedded systems". The branch, master has been updated via 1d81dc5276b78a6f893c35ffd80bbf331d4f0833 (commit) from 96807d27a3ea01f427b6b98618ca87e9c1c00683 (commit) Those revisions listed above that are new to this repository have not appeared on any other notification email; so we list those revisions in full, below. - Log ----------------------------------------------------------------- commit 1d81dc5276b78a6f893c35ffd80bbf331d4f0833 Author: Waldemar Brodkorb <wbx(a)openadk.org> Date: Tue Jun 23 21:18:49 2015 +0200 add patch from ldso-future branch Fixes segfaults when gcc 5.1 is used for x86. http://git.uclibc.org/uClibc/commit/ldso/ldso/i386/dl-sysdep.h?h=ldso-futur… Mentioned in #uclibc. ----------------------------------------------------------------------- Summary of changes: ldso/ldso/i386/dl-sysdep.h | 30 +++++++++++++----------------- 1 file changed, 13 insertions(+), 17 deletions(-) diff --git a/ldso/ldso/i386/dl-sysdep.h b/ldso/ldso/i386/dl-sysdep.h index a66c802..8efa1a8 100644 --- a/ldso/ldso/i386/dl-sysdep.h +++ b/ldso/ldso/i386/dl-sysdep.h @@ -37,31 +37,27 @@ extern unsigned long _dl_linux_resolver(struct elf_resolve * tpnt, int reloc_ent | (((type) == R_386_COPY) * ELF_RTYPE_CLASS_COPY)) /* Return the link-time address of _DYNAMIC. Conveniently, this is the - first element of the GOT. This must be inlined in a function which - uses global data. */ -static __always_inline Elf32_Addr elf_machine_dynamic (void) attribute_unused; -static __always_inline Elf32_Addr + first element of the GOT, a special entry that is never relocated. */ +extern const Elf32_Addr _GLOBAL_OFFSET_TABLE_[] attribute_hidden; +static __always_inline Elf32_Addr __attribute__ ((unused, const)) elf_machine_dynamic (void) { - register Elf32_Addr *got __asm__ ("%ebx"); - return *got; + /* This produces a GOTOFF reloc that resolves to zero at link time, so in + fact just loads from the GOT register directly. By doing it without + an asm we can let the compiler choose any register. */ + return _GLOBAL_OFFSET_TABLE_[0]; } +extern Elf32_Dyn bygotoff[] __asm__ ("_DYNAMIC") attribute_hidden; /* Return the run-time load address of the shared object. */ -static __always_inline Elf32_Addr elf_machine_load_address (void) attribute_unused; -static __always_inline Elf32_Addr +static __always_inline Elf32_Addr attribute_unused elf_machine_load_address (void) { - /* It doesn't matter what variable this is, the reference never makes - it to assembly. We need a dummy reference to some global variable - via the GOT to make sure the compiler initialized %ebx in time. */ - Elf32_Addr addr; - int tmp; - __asm__ ("leal _dl_start@GOTOFF(%%ebx), %0\n" - "subl _dl_start@GOT(%%ebx), %0" - : "=r" (addr) : "m" (tmp) : "cc"); - return addr; + /* Compute the difference between the runtime address of _DYNAMIC as seen + by a GOTOFF reference, and the link-time address found in the special + unrelocated first GOT entry. */ + return (Elf32_Addr) &bygotoff - elf_machine_dynamic (); } static __always_inline void hooks/post-receive -- uClibc-ng - small C library for embedded systems