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| author | Julian Brown <julian@codesourcery.com> | 2005-04-15 16:37:47 +0000 |
|---|---|---|
| committer | Julian Brown <julian@codesourcery.com> | 2005-04-15 16:37:47 +0000 |
| commit | 33bfe77466aaf8e59a3b8c4d99797ad8c8c646fc (patch) | |
| tree | 89af961c8b8867fdfbd45aafd6e2aa743b773443 /ld/ld.texinfo | |
| parent | ac559f4a6daae06b15dbcaeaa9c383a91e9e3e41 (diff) | |
| download | gdb-33bfe77466aaf8e59a3b8c4d99797ad8c8c646fc.zip gdb-33bfe77466aaf8e59a3b8c4d99797ad8c8c646fc.tar.gz gdb-33bfe77466aaf8e59a3b8c4d99797ad8c8c646fc.tar.bz2 | |
* bfd/bfd-in.h (bfd_elf32_arm_set_target_relocs): Update prototype.
* bfd/bfd-in2.h: Regenerate.
* bfd/elf32-arm.c (elf32_arm_link_hash_table): New field, 'use_blx'.
(elf32_arm_link_hash_table_create): Initialise fix_v4bx, use_blx.
(bfd_elf32_arm_set_target_relocs): Handle use_blx.
(elf32_arm_final_link_relocate): Use Thumb BLX for R_ARM_THM_PC22
relocations if requested to.
(allocate_dynrelocs): Don't count size of omitted Thumb stubs based on
use_blx rather than symbian_p.
(elf32_arm_finish_dynamic_symbol): Don't output Thumb PLT stubs if
use_blx is in effect.
(elf32_arm_symbian_link_hash_table_create): Enable use_blx by default
for SymbianOS.
* ld/ld.texinfo: Document --use-blx.
* ld/emultempl/armelf.em (use_blx): New variable.
(arm_elf_create_output_section_statements): Communicate value of
use_blx to bfd.
(PARSE_AND_LIST_PROLOGUE): Add OPTION_USE_BLX.
(PARSE_AND_LIST_OPTIONS): Add --use-blx option.
(PARSE_AND_LIST_ARGS_CASES): Add OPTION_USE_BLX case.
Diffstat (limited to 'ld/ld.texinfo')
| -rw-r--r-- | ld/ld.texinfo | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/ld/ld.texinfo b/ld/ld.texinfo index 99afaf2..7860e25 100644 --- a/ld/ld.texinfo +++ b/ld/ld.texinfo @@ -5262,6 +5262,17 @@ linker, which causes v4t @code{BX rM} instructions to be rewritten as In the former case, the switch should not be used, and @samp{R_ARM_V4BX} relocations are ignored. +@cindex USE_BLX +@kindex --use-blx +The @samp{--use-blx} switch enables the linker to use ARM/Thumb +BLX instructions (available on ARMv5t and above) in various +situations. Currently it is used to perform calls via the PLT from Thumb +code using BLX rather than using BX and a mode-switching stub before +each PLT entry. This should lead to such calls executing slightly faster. + +This option is enabled implicitly for SymbianOS, so there is no need to +specify it if you are using that target. + @ifclear GENERIC @lowersections @end ifclear |