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| author | H.J. Lu <hjl.tools@gmail.com> | 2017-09-29 16:23:18 -0700 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2017-09-29 16:23:33 -0700 |
| commit | 8172aad937f52fe4ae891a206492150815791f2a (patch) | |
| tree | 97fc934222208804a3c483a88ae4b60fa0f0b67c /sysdeps/arm | |
| parent | 54464e749d91401ccf20a5dc1c7af86b752c9e0c (diff) | |
| download | glibc-8172aad937f52fe4ae891a206492150815791f2a.zip glibc-8172aad937f52fe4ae891a206492150815791f2a.tar.gz glibc-8172aad937f52fe4ae891a206492150815791f2a.tar.bz2 | |
arm: Update elf_machine_load_address for static PIE
When --enable-static-pie is used to configure glibc, we need to use
_dl_relocate_static_pie to compute load address in static PIE.
* sysdeps/arm/dl-machine.h (elf_machine_load_address): Use
_dl_relocate_static_pie instead of _dl_start to compute load
address in static PIE. Return 0 if _DYNAMIC is undefined for
static executable.
Diffstat (limited to 'sysdeps/arm')
| -rw-r--r-- | sysdeps/arm/dl-machine.h | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/sysdeps/arm/dl-machine.h b/sysdeps/arm/dl-machine.h index 7d733f2..efe2e1b 100644 --- a/sysdeps/arm/dl-machine.h +++ b/sysdeps/arm/dl-machine.h @@ -53,10 +53,20 @@ elf_machine_dynamic (void) static inline Elf32_Addr __attribute__ ((unused)) elf_machine_load_address (void) { + Elf32_Addr pcrel_addr; +#ifdef SHARED extern Elf32_Addr __dl_start (void *) asm ("_dl_start"); Elf32_Addr got_addr = (Elf32_Addr) &__dl_start; - Elf32_Addr pcrel_addr; asm ("adr %0, _dl_start" : "=r" (pcrel_addr)); +#else + extern Elf32_Dyn _DYNAMIC[] __attribute__((weak, visibility ("hidden"))); + if (!_DYNAMIC) + return 0; + extern Elf32_Addr __dl_relocate_static_pie (void *) + asm ("_dl_relocate_static_pie") attribute_hidden; + Elf32_Addr got_addr = (Elf32_Addr) &__dl_relocate_static_pie; + asm ("adr %0, _dl_relocate_static_pie" : "=r" (pcrel_addr)); +#endif #ifdef __thumb__ /* Clear the low bit of the function address. |