Author: kib
Date: Mon Apr 21 02:55:46 2014
New Revision: 264719
URL: http://svnweb.freebsd.org/changeset/base/264719
Log:
MFC r264481:
Add dwarf annotations to the amd64 _rtld_bind_start to allow debuggers
to unwind around the calls from PLT to binder.
Modified:
stable/9/libexec/rtld-elf/amd64/rtld_start.S
Directory Properties:
stable/9/libexec/rtld-elf/ (props changed)
Modified: stable/9/libexec/rtld-elf/amd64/rtld_start.S
==============================================================================
--- stable/9/libexec/rtld-elf/amd64/rtld_start.S Mon Apr 21 02:55:27
2014 (r264718)
+++ stable/9/libexec/rtld-elf/amd64/rtld_start.S Mon Apr 21 02:55:46
2014 (r264719)
@@ -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
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