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| author | Alan Modra <amodra@gmail.com> | 2014-06-03 10:55:29 +0930 |
|---|---|---|
| committer | Alan Modra <amodra@gmail.com> | 2014-06-03 10:55:29 +0930 |
| commit | 397998fc32a34d3c8993ef46da45c3957a4dd402 (patch) | |
| tree | 2dba3305c8567097b13505879d970299d2b9ad08 /ld | |
| parent | 61f5c66f62502f33e1f2441a043bd29bb3ad6ea5 (diff) | |
| download | gdb-397998fc32a34d3c8993ef46da45c3957a4dd402.zip gdb-397998fc32a34d3c8993ef46da45c3957a4dd402.tar.gz gdb-397998fc32a34d3c8993ef46da45c3957a4dd402.tar.bz2 | |
Support fusion for ELFv2 stubs
Power8 fuses addis,addi and addis,ld sequences when the target of the
addis is the same as the addi/ld. Thus
addis r12,r2,xxx@ha
addi r12,r12,xxx@l / ld r12,xxx@l(r12)
is faster than
addis r11,r2,xxx@ha
addi r12,r11,xxx@l / ld r12,xxx@l(r11)
So use the form that allows fusion in plt call and branch stubs.
bfd/
* elf64-ppc.c (ADDIS_R12_R2): Define.
(build_plt_stub): Support fusion on ELFv2 stub.
(ppc_build_one_stub): Likewise for plt branch stubs.
gold/
* powerpc.cc (addis_12_2): Define.
(Stub_table::do_write): Support fusion on ELFv2 stubs.
ld/testsuite/
* ld-powerpc/elfv2exe.d: Update for changed plt call stubs.
gdb/
* ppc64-tdep.c (ppc64_standard_linkage8): New.
(ppc64_skip_trampoline_code): Recognise ELFv2 stub supporting fusion.
Diffstat (limited to 'ld')
| -rw-r--r-- | ld/testsuite/ChangeLog | 4 | ||||
| -rw-r--r-- | ld/testsuite/ld-powerpc/elfv2exe.d | 8 |
2 files changed, 8 insertions, 4 deletions
diff --git a/ld/testsuite/ChangeLog b/ld/testsuite/ChangeLog index bd604b6..bc80518 100644 --- a/ld/testsuite/ChangeLog +++ b/ld/testsuite/ChangeLog @@ -1,3 +1,7 @@ +2014-06-03 Alan Modra <amodra@gmail.com> + + * ld-powerpc/elfv2exe.d: Update for changed plt call stubs. + 2014-05-28 Matthew Fortune <matthew.fortune@imgtec.com> * lib/ld-lib.exp: Add objcopy_objects command to run_dump_test. diff --git a/ld/testsuite/ld-powerpc/elfv2exe.d b/ld/testsuite/ld-powerpc/elfv2exe.d index 7ff9d38..9ea816c 100644 --- a/ld/testsuite/ld-powerpc/elfv2exe.d +++ b/ld/testsuite/ld-powerpc/elfv2exe.d @@ -8,14 +8,14 @@ Disassembly of section \.text: 0+100000c0 <.*\.plt_branch\.f2>: -.*: (ff ff 62 3d|3d 62 ff ff) addis r11,r2,-1 -.*: (f0 7f 8b e9|e9 8b 7f f0) ld r12,32752\(r11\) +.*: (ff ff 82 3d|3d 82 ff ff) addis r12,r2,-1 +.*: (f0 7f 8c e9|e9 8c 7f f0) ld r12,32752\(r12\) .*: (a6 03 89 7d|7d 89 03 a6) mtctr r12 .*: (20 04 80 4e|4e 80 04 20) bctr 0+100000d0 <.*\.plt_branch\.f4>: -.*: (ff ff 62 3d|3d 62 ff ff) addis r11,r2,-1 -.*: (f8 7f 8b e9|e9 8b 7f f8) ld r12,32760\(r11\) +.*: (ff ff 82 3d|3d 82 ff ff) addis r12,r2,-1 +.*: (f8 7f 8c e9|e9 8c 7f f8) ld r12,32760\(r12\) .*: (a6 03 89 7d|7d 89 03 a6) mtctr r12 .*: (20 04 80 4e|4e 80 04 20) bctr |