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Set up initial stack frame as zero pointer.

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This allows call traces to know when they are done.
This commit is contained in:
Jonas 'Sortie' Termansen 2012-12-07 20:35:00 +01:00
parent 27fda0c0eb
commit 9411784b58
2 changed files with 12 additions and 0 deletions
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6
libc/x64/crt1.s
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@ -34,6 +34,12 @@
.global _start .global _start
.type _start, @function .type _start, @function
_start: _start:
# Set up end of the stack frame linked list.
xorl %ebp, %ebp
pushq %rbp # rip=0
pushq %rbp # rbp=0
movq %rsp, %rbp
movq %rcx, environ # envp movq %rcx, environ # envp
# Prepare signals, memory allocation, stdio and such. # Prepare signals, memory allocation, stdio and such.

6
libc/x86/crt1.s
View file

@ -34,6 +34,12 @@
.global _start .global _start
.type _start, @function .type _start, @function
_start: _start:
# Set up end of the stack frame linked list.
xorl %ebp, %ebp
pushl %ebp # rip=0
pushl %ebp # rbp=0
movl %esp, %ebp
movl %ecx, environ # envp movl %ecx, environ # envp
# Arguments for main # Arguments for main