From 8172aad937f52fe4ae891a206492150815791f2a Mon Sep 17 00:00:00 2001 From: "H.J. Lu" Date: Fri, 29 Sep 2017 16:23:18 -0700 Subject: 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. --- sysdeps/arm/dl-machine.h | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) (limited to 'sysdeps/arm') diff --git a/sysdeps/arm/dl-machine.h b/sysdeps/arm/dl-machine.h index 7d733f2b1c..efe2e1b3a3 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. -- cgit v1.2.3-70-g09d2