Hi All,
I want to use -finstrument-functions options to trace some function
calls of kernel.
$cat drivers/base/power/.runtime.o.cmd
arm-none-linux-gnueabi-gcc -Wp,-MD,drivers/base/power/.runtime.o.d
-nostdinc -isystem
/opt/arm-2009q3-none-linux-gnueabi/bin/../lib/gcc/arm-none-linux-gnueabi/4.4.1/include
-I/home/PRC/git/linux-2.6/arch/arm/include -Iinclude -include
include/generated/autoconf.h -D__KERNEL__ -mlittle-endian
-Iarch/arm/mach-versatile/include -Wall -Wundef -Wstrict-prototypes
-Wno-trigraphs -fno-strict-aliasing -fno-common
-Werror-implicit-function-declaration -Wno-format-security
-fno-delete-null-pointer-checks -Os -marm -fno-omit-frame-pointer
-mapcs -mno-sched-prolog -mabi=aapcs-linux -mno-thumb-interwork
-D__LINUX_ARM_ARCH__=7 -march=armv7-a -msoft-float -Uarm
-Wframe-larger-than=1024 -fno-stack-protector -fno-omit-frame-pointer
-fno-optimize-sibling-calls -g -Wdeclaration-after-statement
-Wno-pointer-sign -fno-strict-overflow -fno-dwarf2-cfi-asm
-fconserve-stack -finstrument-functions
-finstrument-functions-exclude-file-list=linux/,asm/,runtime.c
-D"KBUILD_STR(s)=\#s" -D"KBUILD_BASENAME=KBUILD_STR(runtime)"
-D"KBUILD_MODNAME=KBUILD_STR(runtime)" -c -o
drivers/base/power/runtime.o drivers/base/power/runtime.c
I wish gcc invoke __cyg_profile_func_enter/__cyg_profile_func_exit
only from the functions within `runtime.c' in the driver/base/power.
It is not successful.
$nm drivers/power/base/main.o
...
U __cyg_profile_func_enter
U __cyg_profile_func_exit
But with the some gcc, I handle another simple source file,
$cat 1.c
void function1_1() {}
$ arm-none-linux-gnueabi-gcc -Os -finstrument-functions
-finstrument-functions-exclude-file-list=1.c -c 1.c
$ nm 1.o
00000000 t $a
00000000 r $d
U __aeabi_unwind_cpp_pr0
00000000 T function1_1
$ arm-none-linux-gnueabi-gcc -Os -finstrument-functions -c 1.c
$ nm 1.o
00000000 t $a
00000024 t $d
00000000 r $d
U __aeabi_unwind_cpp_pr0
U __cyg_profile_func_enter
U __cyg_profile_func_exit
00000000 T function1_1
I guess -finstrument-functions and
-finstrument-functions-exclude-file-list are affected by some other
options.
So what's wrong.
-
PRC
