diff options
| author | Joern Rennecke <joern.rennecke@embecosm.com> | 2014-07-25 17:39:04 +0530 |
|---|---|---|
| committer | Bernhard Reutner-Fischer <rep.dot.nop@gmail.com> | 2014-08-18 11:52:16 +0200 |
| commit | 6915b3a6b96e8e34601941c0eb7519cde1c0f999 (patch) | |
| tree | d4d3207dd3f10f4243489c8b7b45e9556fd7af3b | |
| parent | e2cf30bb7543a99defd457226a39de8d8860fa9e (diff) | |
ARC: ldso: Use @pcl syntax.
Signed-off-by: Joern Rennecke <joern.rennecke@embecosm.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
| -rw-r--r-- | ldso/ldso/arc/dl-startup.h | 9 | ||||
| -rw-r--r-- | ldso/ldso/arc/dl-sysdep.h | 17 |
2 files changed, 14 insertions, 12 deletions
diff --git a/ldso/ldso/arc/dl-startup.h b/ldso/ldso/arc/dl-startup.h index 016155473..8e26ae8d9 100644 --- a/ldso/ldso/arc/dl-startup.h +++ b/ldso/ldso/arc/dl-startup.h @@ -33,14 +33,9 @@ __asm__( " ; If ldso ran as cmd with executable file nm as arg \n" " ; skip the extra args calc by dl_start() \n" " ld_s r1, [sp] ; orig argc from aux-vec Tbl \n" -#ifdef STAR_9000535888_FIXED - " ld r12, [pcl, _dl_skip_args-.+(.&2)] \n" -#else - " add r12, pcl, _dl_skip_args-.+(.&2) \n" - " ld r12, [r12] \n" -#endif + " ld r12, [pcl, _dl_skip_args@pcl] \n" - " add r2, pcl, _dl_fini-.+(.&2) ; finalizer \n" + " add r2, pcl, _dl_fini@pcl ; finalizer \n" " add2 sp, sp, r12 ; discard argv entries from stack\n" " sub_s r1, r1, r12 ; adjusted argc, on stack \n" diff --git a/ldso/ldso/arc/dl-sysdep.h b/ldso/ldso/arc/dl-sysdep.h index 97ce28492..af4b18064 100644 --- a/ldso/ldso/arc/dl-sysdep.h +++ b/ldso/ldso/arc/dl-sysdep.h @@ -124,14 +124,21 @@ static __always_inline Elf32_Addr elf_machine_dynamic(void) /* Return the run-time load address of the shared object. */ static __always_inline Elf32_Addr elf_machine_load_address(void) { - /* To find the loadaddr we subtract the runtime addr of any symbol - * say _dl_start from it's build-time addr. + /* To find the loadaddr we subtract the runtime addr of a non-local symbol + * say _DYNAMIC from it's build-time addr. + * N.B., gotpc loads get optimized by the linker if it finds the symbol + * is resolved locally. + * A more robust - and efficient - solution would be to use a symbol + * set by the linker. To make it actually save space, we'd have to + * suppress the unwanted text relocation in the linked dso, though. + * (I.e. in ldso.so.*, though it's just another dso as far as bfd/ld + * are concerned.) */ Elf32_Addr addr, tmp; __asm__ ( - "ld %1, [pcl, _dl_start@gotpc] ;build addr of _dl_start \n" - "add %0, pcl, _dl_start-.+(.&2) ;runtime addr of _dl_start \n" - "sub %0, %0, %1 ;delta \n" + "ld %1, [pcl, _DYNAMIC@gotpc] ;build addr of _DYNAMIC" "\n" + "add %0, pcl, _DYNAMIC@pcl ;runtime addr of _DYNAMIC" "\n" + "sub %0, %0, %1 ;delta" "\n" : "=&r" (addr), "=r"(tmp) ); return addr; |