https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66457
Bug ID: 66457
Summary: gcc generates an extra "mov ??, %edx" before "call
mcount" when "-pg" is enabled in cross compilation
Product: gcc
Version: 4.9.2
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: leedypku at gmail dot com
Target Milestone: ---
# On Darwin, with cross compilation, some code omitted
$ echo 'int main(){}' | i386-jos-elf-gcc -pg -m32 -S -x c -o - -
main:
pushl %ebp
movl %esp, %ebp
.LP0:
movl $.LP0,%edx # this line
call _mcount
popl %ebp
ret
.ident "GCC: (GNU) 4.9.2"
# On Linux, some code omitted
$ echo 'int main(){}' | gcc -pg -S -m32 -x c -o - -
main:
pushl %ebp
movl %esp, %ebp
call mcount
popl %ebp
ret
.ident "GCC: (Ubuntu 4.8.2-19ubuntu1) 4.8.2"
1. It happens only in cross compilation.
2. The target is i386-jos-elf and the host is Darwin.
3. I've tested with GCC version 4.6.1, 4.6.4 and 4.9.2.
4. How can I disable it?
