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| author | Jim Grosbach <grosbach@apple.com> | 2012-09-25 18:07:17 +0000 |
|---|---|---|
| committer | Jim Grosbach <grosbach@apple.com> | 2012-09-25 18:07:17 +0000 |
| commit | fe2d5f848764dff8f9ba734a5e2438ca1535890e (patch) | |
| tree | cd42c1e77b5ceae8e0cb49b0892bbf384f286264 /test/MC/MachO | |
| parent | 13098443994339249fb3f085bbc4fbcdf9f033db (diff) | |
| download | external_llvm-fe2d5f848764dff8f9ba734a5e2438ca1535890e.zip external_llvm-fe2d5f848764dff8f9ba734a5e2438ca1535890e.tar.gz external_llvm-fe2d5f848764dff8f9ba734a5e2438ca1535890e.tar.bz2 | |
ARM: Darwin BL/BLX relocations to out-of-range symbols.
When a BL/BLX references a symbol in the same translation unit that is
out of range, use an external relocation. The linker will use this to
generate a branch island rather than a direct reference, allowing the
relocation to resolve correctly.
rdar://12359919
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@164615 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/MC/MachO')
| -rw-r--r-- | test/MC/MachO/ARM/long-call-branch-island-relocation.s | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/test/MC/MachO/ARM/long-call-branch-island-relocation.s b/test/MC/MachO/ARM/long-call-branch-island-relocation.s new file mode 100644 index 0000000..8ee7da5 --- /dev/null +++ b/test/MC/MachO/ARM/long-call-branch-island-relocation.s @@ -0,0 +1,43 @@ +@ RUN: llvm-mc -n -triple armv7-apple-darwin10 %s -filetype=obj -o %t.o +@ RUN: macho-dump --dump-section-data < %t.o | FileCheck %s + +@ rdar://12359919 + + .syntax unified + .text + + .globl _bar + .align 2 + .code 16 + .thumb_func _bar +_bar: + push {r7, lr} + mov r7, sp + bl _foo + pop {r7, pc} + + +_junk: +@ Make the _foo symbol sufficiently far away to force the 'bl' relocation +@ above to be out of range. On Darwin, the assembler deals with this by +@ generating an external relocation so the linker can create a branch +@ island. + + .space 20000000 + + .section __TEXT,initcode,regular,pure_instructions + + .globl _foo + .align 2 + .code 16 +_foo: + push {r7, lr} + mov r7, sp + pop {r7, pc} + + +@ CHECK: ('_relocations', [ +@ CHECK: # Relocation 0 +@ CHECK: (('word-0', 0x4), +@ CHECK: ('word-1', 0x6d000002)), +@ CHECK: ]) |