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Hi all:
I have something wired and I have no idea whether it comes with
elf32-littlemips and elf32-tradlittlemips these 2 different mips link
format.
1. I have 2 mips-toolchains, tool A, one support elf32-tradlittlemips
with gcc 3.4.4, and, tool B, generated by cross-ng which support
elf32-littlemips with gcc4.2.1.
2. I compile my test program with these 2 toolchain with "-c -g "
option, and i can see source codes embedded in *.o, the elf output I
build.
3. but after I use linker to link them together, I can see the source
codes embedded in the final ELF output with tool A build, but tool B
cannot.
I know the version of these toolchains is quite different, 4.2.1 vs 3.4.4.
But everything seems fine before final linking, and the parameters i
pass to ld are the same, except the output format they support.
Is there any document or steps can tell me how to generate binutils
which supports elf32-tradlittlemips such that I can do the comparison,
since i cannot see any setting about these 2 format in ct-ng
menuconfig.
I attach my result and commands at the end of letter for your reference.
appreciate your help,
miloody
/* source codes not embedded in the elf*/
80000298 <main>:
80000298: 27bdffd8 addiu sp,sp,-40
8000029c: afbf0024 sw ra,36(sp)
800002a0: afbe0020 sw s8,32(sp)
800002a4: 03a0f021 move s8,sp
800002a8: 24020017 li v0,23
800002ac: afc20018 sw v0,24(s8)
800002b0: 24020020 li v0,32
800002b4: afc20014 sw v0,20(s8)
800002b8: 2402002c li v0,44
800002bc: afc20010 sw v0,16(s8)
800002c0: 8fc30018 lw v1,24(s8)
800002c4: 8fc20014 lw v0,20(s8)
800002c8: 00621821 addu v1,v1,v0
800002cc: 8fc20010 lw v0,16(s8)
800002d0: 00621021 addu v0,v1,v0
800002d4: afc20018 sw v0,24(s8)
800002d8: 24040100 li a0,256
800002dc: 0c0000d8 jal 80000360 <malloc>
800002e0: 00000000 nop
800002e4: afc2001c sw v0,28(s8)
800002e8: 0c00009e jal 80000278 <newline>
800002ec: 00000000 nop
800002f0: 03c0e821 move sp,s8
800002f4: 8fbf0024 lw ra,36(sp)
800002f8: 8fbe0020 lw s8,32(sp)
800002fc: 27bd0028 addiu sp,sp,40
/*source code is embedded in elf*/
int main()
//int c_entry()
{
90: 27bdffd8 addiu sp,sp,-40
94: afbf0024 sw ra,36(sp)
98: afbe0020 sw s8,32(sp)
9c: 03a0f021 move s8,sp
char * point;
int a,b,c;
a =23;
a0: 24020017 li v0,23
a4: afc20018 sw v0,24(s8)
b = 32;
a8: 24020020 li v0,32
ac: afc20014 sw v0,20(s8)
c = 44;
b0: 2402002c li v0,44
b4: afc20010 sw v0,16(s8)
a = a+b+c;
b8: 8fc30018 lw v1,24(s8)
bc: 8fc20014 lw v0,20(s8)
c0: 00621821 addu v1,v1,v0
c4: 8fc20010 lw v0,16(s8)
c8: 00621021 addu v0,v1,v0
cc: afc20018 sw v0,24(s8)
/*my commands that I can see source */
mipsel-unknown-elf-gcc -g -G 0 -mips32r2 -fno-omit-frame-pointer
-fno-optimize-sibling-calls -I./include -I./device/display
-I./device/fatfs -I./device/misc -I./device/ntstrg -I./device/ntuart
-I./device/ntxsub -I./device/vpu
-I/media/sdb1/newlib-1.17.0/build/mipsel/include -D_ASSEMBLER_ -c
init.S
mipsel-unknown-elf-gcc -g -G 0 -mips32r2 -fno-omit-frame-pointer
-fno-optimize-sibling-calls -I./include -I./device/display
-I./device/fatfs -I./device/misc -I./device/ntstrg -I./device/ntuart
-I./device/ntxsub -I./device/vpu
-I/media/sdb1/newlib-1.17.0/build/mipsel/include -D_ASSEMBLER_ -c
reset.S
mipsel-unknown-elf-gcc -g -G 0 -mips32r2 -fno-omit-frame-pointer
-fno-optimize-sibling-calls -I./include -I./device/display
-I./device/fatfs -I./device/misc -I./device/ntstrg -I./device/ntuart
-I./device/ntxsub -I./device/vpu
-I/media/sdb1/newlib-1.17.0/build/mipsel/include -c atexit.c
mipsel-unknown-elf-gcc -g -G 0 -mips32r2 -fno-omit-frame-pointer
-fno-optimize-sibling-calls -I./include -I./device/display
-I./device/fatfs -I./device/misc -I./device/ntstrg -I./device/ntuart
-I./device/ntxsub -I./device/vpu
-I/media/sdb1/newlib-1.17.0/build/mipsel/include -c main.c
mipsel-unknown-elf-ld -T ./link.xn -o TestCode.elf -Map TestCode.map
--oformat elf32-littlemips init.o reset.o atexit.o main.o -static
-nostdlib -L/media/sdb1/newlib-1.17.0/build/mipsel/lib
-L/root/bare_metal/x-tools/mipsel-unknown-elf/lib/gcc/mipsel-unknown-elf/4.2.4
-lc -lnullmon -lgcc
rm -f TestCode.dla
rm -f TestCode.dnm
/* commands that I cannot see source
sde-gcc -g -G 0 -mips32r2 -fno-omit-frame-pointer
-fno-optimize-sibling-calls -I./include -I./device/display
-I./device/fatfs -I./device/misc -I./device/ntstrg -I./device/ntuart
-I./device/ntxsub -I./device/vpu
-I/media/sdb1/newlib-1.17.0/build/mipsel/include -D_ASSEMBLER_ -c
init.S
sde-gcc -g -G 0 -mips32r2 -fno-omit-frame-pointer
-fno-optimize-sibling-calls -I./include -I./device/display
-I./device/fatfs -I./device/misc -I./device/ntstrg -I./device/ntuart
-I./device/ntxsub -I./device/vpu
-I/media/sdb1/newlib-1.17.0/build/mipsel/include -D_ASSEMBLER_ -c
reset.S
sde-gcc -g -G 0 -mips32r2 -fno-omit-frame-pointer
-fno-optimize-sibling-calls -I./include -I./device/display
-I./device/fatfs -I./device/misc -I./device/ntstrg -I./device/ntuart
-I./device/ntxsub -I./device/vpu
-I/media/sdb1/newlib-1.17.0/build/mipsel/include -c atexit.c
sde-gcc -g -G 0 -mips32r2 -fno-omit-frame-pointer
-fno-optimize-sibling-calls -I./include -I./device/display
-I./device/fatfs -I./device/misc -I./device/ntstrg -I./device/ntuart
-I./device/ntxsub -I./device/vpu
-I/media/sdb1/newlib-1.17.0/build/mipsel/include -c main.c
sde-ld -T ./link.xn -o TestCode.elf -Map TestCode.map --oformat
elf32-tradlittlemips init.o reset.o atexit.o main.o -static -nostdlib
-L/media/sdb1/newlib-1.17.0/build/mipsel/lib
-L/root/bare_metal/x-tools/sde/lib/gcc/3.4.4/el -lc -lnullmon -lgcc
rm -f TestCode.dla
--
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