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| author | Konstantin Belousov <kib@FreeBSD.org> | 2014-04-14 22:44:50 +0000 |
|---|---|---|
| committer | Konstantin Belousov <kib@FreeBSD.org> | 2014-04-14 22:44:50 +0000 |
| commit | 8cc566349592f2d51522dad338fc5c4dca665c7b (patch) | |
| tree | e58ee87d72748e08a159c8a033076f0b9217ddef /libexec | |
| parent | 819b4fd06a2106d4c2ccfe845af9ef7a71da66d6 (diff) | |
| download | src-8cc566349592f2d51522dad338fc5c4dca665c7b.tar.gz src-8cc566349592f2d51522dad338fc5c4dca665c7b.zip | |
Add dwarf annotations to the amd64 _rtld_bind_start to allow debuggers
to unwind around the calls from PLT to binder.
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Notes
Notes:
svn path=/head/; revision=264481
Diffstat (limited to 'libexec')
| -rw-r--r-- | libexec/rtld-elf/amd64/rtld_start.S | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/libexec/rtld-elf/amd64/rtld_start.S b/libexec/rtld-elf/amd64/rtld_start.S index da3d156e00f7..2481f09417dc 100644 --- a/libexec/rtld-elf/amd64/rtld_start.S +++ b/libexec/rtld-elf/amd64/rtld_start.S @@ -79,17 +79,39 @@ .globl _rtld_bind_start .type _rtld_bind_start,@function _rtld_bind_start: + .cfi_startproc + .cfi_adjust_cfa_offset 16 subq $8,%rsp + .cfi_adjust_cfa_offset 8 pushfq # Save rflags + .cfi_adjust_cfa_offset 8 pushq %rax # Save %rax + .cfi_adjust_cfa_offset 8 + .cfi_offset %rax,-32 pushq %rdx # Save %rdx + .cfi_adjust_cfa_offset 8 + .cfi_offset %rdx,-40 pushq %rcx # Save %rcx + .cfi_adjust_cfa_offset 8 + .cfi_offset %rcx,-48 pushq %rsi # Save %rsi + .cfi_adjust_cfa_offset 8 + .cfi_offset %rsi,-56 pushq %rdi # Save %rdi + .cfi_adjust_cfa_offset 8 + .cfi_offset %rdi,-64 pushq %r8 # Save %r8 + .cfi_adjust_cfa_offset 8 + .cfi_offset %r8,-72 pushq %r9 # Save %r9 + .cfi_adjust_cfa_offset 8 + .cfi_offset %r9,-80 pushq %r10 # Save %r10 + .cfi_adjust_cfa_offset 8 + .cfi_offset %r10,-88 pushq %r11 # Save %r11 + .cfi_adjust_cfa_offset 8 + .cfi_offset %r11,-96 movq 0x58(%rsp),%rdi # Fetch obj argument movq 0x60(%rsp),%rsi # Fetch reloff argument @@ -101,16 +123,37 @@ _rtld_bind_start: movq %rax,0x60(%rsp) # Store target over reloff argument popq %r11 # Restore %r11 + .cfi_adjust_cfa_offset -8 + .cfi_restore %r11 popq %r10 # Restore %r10 + .cfi_adjust_cfa_offset -8 + .cfi_restore %r10 popq %r9 # Restore %r9 + .cfi_adjust_cfa_offset -8 + .cfi_restore %r9 popq %r8 # Restore %r8 + .cfi_adjust_cfa_offset -8 + .cfi_restore %r8 popq %rdi # Restore %rdi + .cfi_adjust_cfa_offset -8 + .cfi_restore %rdi popq %rsi # Restore %rsi + .cfi_adjust_cfa_offset -8 + .cfi_restore %rsi popq %rcx # Restore %rcx + .cfi_adjust_cfa_offset -8 + .cfi_restore %rcx popq %rdx # Restore %rdx + .cfi_adjust_cfa_offset -8 + .cfi_restore %rdx popq %rax # Restore %rax + .cfi_adjust_cfa_offset -8 + .cfi_restore %rax popfq # Restore rflags + .cfi_adjust_cfa_offset -8 leaq 16(%rsp),%rsp # Discard spare, obj, do not change rflags ret # "Return" to target address + .cfi_endproc + .size _rtld_bind_start, . - _rtld_bind_start .section .note.GNU-stack,"",%progbits |