* Re: Another script for building binutils
@ 1999-07-28 20:52 Mark E.
1999-07-29 11:29 ` Ian Lance Taylor
0 siblings, 1 reply; 4+ messages in thread
From: Mark E. @ 1999-07-28 20:52 UTC (permalink / raw)
To: binutils
There definitely seems to be a problem with -g. Here's a sample program that shows
the problem:
#include <stdio.h>
#include <io.h>
int main()
{
int fd = 3;
short dev_info;
while (fd <= 20)
{
dev_info = _get_dev_info(fd);
if (dev_info >= 0)
printf ("%i ", fd);
++fd;
}
printf ("\n");
return 0;
}
which generates with -g:
.file "main.c"
gcc2_compiled.:
___gnu_compiled_c:
.text
.def _va_list; .scl 13; .type 021; .endef
.def _size_t; .scl 13; .type 017; .endef
.def _.0fake; .scl 10; .type 010; .size 32; .endef
.def __cnt; .val 0; .scl 8; .type 04; .endef
.def __ptr; .val 4; .scl 8; .type 022; .endef
.def __base; .val 8; .scl 8; .type 022; .endef
.def __bufsiz; .val 12; .scl 8; .type 04; .endef
.def __flag; .val 16; .scl 8; .type 04; .endef
.def __file; .val 20; .scl 8; .type 04; .endef
.def __name_to_remove; .val 24; .scl 8; .type 022; .endef
.def __fillsize; .val 28; .scl 8; .type 04; .endef
.def .eos; .val 32; .scl 102; .tag _.0fake; .size 32; .endef
.def _FILE; .scl 13; .tag _.0fake; .size 32; .type 010; .endef
.def _fpos_t; .scl 13; .type 017; .endef
.def _dev_t; .scl 13; .type 04; .endef
.def _ino_t; .scl 13; .type 04; .endef
.def _mode_t; .scl 13; .type 04; .endef
.def _nlink_t; .scl 13; .type 04; .endef
.def _gid_t; .scl 13; .type 04; .endef
.def _off_t; .scl 13; .type 04; .endef
.def _pid_t; .scl 13; .type 04; .endef
.def _ssize_t; .scl 13; .type 04; .endef
.def _uid_t; .scl 13; .type 04; .endef
.def _fd_set; .scl 10; .type 010; .size 32; .endef
.def _fd_bits; .val 0; .scl 8; .dim 32; .size 32; .type 074; .endef
.def .eos; .val 32; .scl 102; .tag _fd_set; .size 32; .endef
.def _fd_set; .scl 13; .tag _fd_set; .size 32; .type 010; .endef
.def _time_t; .scl 13; .type 016; .endef
LC0:
.ascii "%i \0"
LC1:
.ascii "\12\0"
.p2align 2
.def _main; .val _main; .scl 2; .type 044; .endef
.globl _main
_main:
.def .bf; .val .; .scl 101; .line 5; .endef
pushl %ebp
movl %esp,%ebp
subl $8,%esp
.ln 2
.def _fd; .val -4; .scl 1; .type 04; .endef
.def _dev_info; .val -6; .scl 1; .type 03; .endef
movl $3,-4(%ebp)
.ln 5
.p2align 2
L2:
cmpl $20,-4(%ebp)
jle L4
jmp L3
.p2align 2
L4:
.ln 7
movl -4(%ebp),%eax
pushl %eax
call __get_dev_info
addl $4,%esp
movl %eax,%eax
movw %ax,-6(%ebp)
.ln 8
cmpw $0,-6(%ebp)
jl L5
.ln 9
movl -4(%ebp),%eax
pushl %eax
pushl $LC0
call _printf
addl $8,%esp
L5:
.ln 10
incl -4(%ebp)
.ln 11
jmp L2
.p2align 2
L3:
.ln 13
pushl $LC1
call _printf
addl $4,%esp
.ln 15
xorl %eax,%eax
jmp L1
.ln 16
.p2align 2
L1:
movl %ebp,%esp
popl %ebp
ret
.def .ef; .val .; .scl 101; .line 16; .endef
.def _main; .val .; .scl -1; .endef
Here's the objdump --debug-syms output for main1.o, generated by the Dec. 98
snapshot version of as.exe:
main1.o: file format coff-go32
SYMBOL TABLE:
[ 0](sec -2)(fl 0x00)(ty 0)(scl 103) (nx 1) 0x00000000 main.c
File
[ 2](sec 1)(fl 0x00)(ty 0)(scl 6) (nx 0) 0x00000000 gcc2_compiled.
[ 3](sec 1)(fl 0x00)(ty 0)(scl 6) (nx 0) 0x00000000 ___gnu_compiled_c
[ 4](sec -2)(fl 0x00)(ty 11)(scl 13) (nx 0) 0x00000000 _va_list
[ 5](sec -2)(fl 0x00)(ty f)(scl 13) (nx 0) 0x00000000 _size_t
[ 6](sec -2)(fl 0x00)(ty 8)(scl 10) (nx 1) 0x00000000 _.0fake
AUX lnno 0 size 0x20 tagndx 0 endndx 18
[ 8](sec -1)(fl 0x00)(ty 4)(scl 8) (nx 0) 0x00000000 __cnt
[ 9](sec -1)(fl 0x00)(ty 12)(scl 8) (nx 0) 0x00000004 __ptr
[ 10](sec -1)(fl 0x00)(ty 12)(scl 8) (nx 0) 0x00000008 __base
[ 11](sec -1)(fl 0x00)(ty 4)(scl 8) (nx 0) 0x0000000c __bufsiz
[ 12](sec -1)(fl 0x00)(ty 4)(scl 8) (nx 0) 0x00000010 __flag
[ 13](sec -1)(fl 0x00)(ty 4)(scl 8) (nx 0) 0x00000014 __file
[ 14](sec -1)(fl 0x00)(ty 12)(scl 8) (nx 0) 0x00000018 __name_to_remove
[ 15](sec -1)(fl 0x00)(ty 4)(scl 8) (nx 0) 0x0000001c __fillsize
[ 16](sec -1)(fl 0x00)(ty 0)(scl 102) (nx 1) 0x00000020 .eos
AUX lnno 0 size 0x20 tagndx 6
[ 18](sec -2)(fl 0x00)(ty 8)(scl 13) (nx 1) 0x00000000 _FILE
AUX lnno 0 size 0x20 tagndx 6
[ 20](sec -2)(fl 0x00)(ty f)(scl 13) (nx 0) 0x00000000 _fpos_t
[ 21](sec -2)(fl 0x00)(ty 4)(scl 13) (nx 0) 0x00000000 _dev_t
[ 22](sec -2)(fl 0x00)(ty 4)(scl 13) (nx 0) 0x00000000 _ino_t
[ 23](sec -2)(fl 0x00)(ty 4)(scl 13) (nx 0) 0x00000000 _mode_t
[ 24](sec -2)(fl 0x00)(ty 4)(scl 13) (nx 0) 0x00000000 _nlink_t
[ 25](sec -2)(fl 0x00)(ty 4)(scl 13) (nx 0) 0x00000000 _gid_t
[ 26](sec -2)(fl 0x00)(ty 4)(scl 13) (nx 0) 0x00000000 _off_t
[ 27](sec -2)(fl 0x00)(ty 4)(scl 13) (nx 0) 0x00000000 _pid_t
[ 28](sec -2)(fl 0x00)(ty 4)(scl 13) (nx 0) 0x00000000 _ssize_t
[ 29](sec -2)(fl 0x00)(ty 4)(scl 13) (nx 0) 0x00000000 _uid_t
[ 30](sec -2)(fl 0x00)(ty 8)(scl 10) (nx 1) 0x00000000 _fd_set
AUX lnno 0 size 0x20 tagndx 0 endndx 36
[ 32](sec -1)(fl 0x00)(ty 3c)(scl 8) (nx 1) 0x00000000 _fd_bits
AUX lnno 0 size 0x20 tagndx 0
[ 34](sec -1)(fl 0x00)(ty 0)(scl 102) (nx 1) 0x00000020 .eos
AUX lnno 0 size 0x20 tagndx 30
[ 36](sec -2)(fl 0x00)(ty 8)(scl 13) (nx 1) 0x00000000 _fd_set
AUX lnno 0 size 0x20 tagndx 30
[ 38](sec -2)(fl 0x00)(ty e)(scl 13) (nx 0) 0x00000000 _time_t
[ 39](sec 1)(fl 0x00)(ty 24)(scl 2) (nx 1) 0x00000008 _main
AUX lnno 96 size 0x0 tagndx 0 endndx 47
_main :
2 : 0xe
5 : 0x15
7 : 0x20
8 : 0x32
9 : 0x39
10 : 0x4a
11 : 0x4d
13 : 0x50
15 : 0x5d
16 : 0x61
[ 41](sec 1)(fl 0x00)(ty 0)(scl 101) (nx 1) 0x00000008 .bf
AUX lnno 5 size 0x0 tagndx 0
[ 43](sec -1)(fl 0x00)(ty 4)(scl 1) (nx 0) 0xfffffffc _fd
[ 44](sec -1)(fl 0x00)(ty 3)(scl 1) (nx 0) 0xfffffffa _dev_info
[ 45](sec 1)(fl 0x00)(ty 0)(scl 101) (nx 1) 0x00000068 .ef
AUX lnno 16 size 0x0 tagndx 0
[ 47](sec 1)(fl 0x00)(ty 0)(scl 3) (nx 1) 0x00000000 .text
AUX scnlen 0x68 nreloc 5 nlnno 11
[ 49](sec 2)(fl 0x00)(ty 0)(scl 3) (nx 1) 0x00000068 .data
AUX scnlen 0x0 nreloc 0 nlnno 0
[ 51](sec 3)(fl 0x00)(ty 0)(scl 3) (nx 1) 0x00000068 .bss
AUX scnlen 0x0 nreloc 0 nlnno 0
[ 53](sec 0)(fl 0x00)(ty 0)(scl 2) (nx 0) 0x00000000 __get_dev_info
[ 54](sec 0)(fl 0x00)(ty 0)(scl 2) (nx 0) 0x00000000 _printf
Now here is the objdump --debug-syms output for main21.o, generated by a very recent
snapshot version of as.exe:
main2.o: file format coff-go32
SYMBOL TABLE:
[ 0](sec -2)(fl 0x00)(ty 0)(scl 103) (nx 1) 0x00000000 main.c
File
[ 2](sec 1)(fl 0x00)(ty 0)(scl 6) (nx 0) 0x00000000 gcc2_compiled.
[ 3](sec 1)(fl 0x00)(ty 0)(scl 6) (nx 0) 0x00000000 ___gnu_compiled_c
[ 4](sec -2)(fl 0x00)(ty 11)(scl 13) (nx 0) 0x00000000 _va_list
[ 5](sec -2)(fl 0x00)(ty f)(scl 13) (nx 0) 0x00000000 _size_t
[ 6](sec -2)(fl 0x00)(ty 8)(scl 10) (nx 1) 0x00000000 _.0fake
AUX lnno 0 size 0x20 tagndx 0 endndx 18
[ 8](sec -1)(fl 0x00)(ty 4)(scl 8) (nx 0) 0x00000000 __cnt
[ 9](sec -1)(fl 0x00)(ty 12)(scl 8) (nx 0) 0x00000004 __ptr
[ 10](sec -1)(fl 0x00)(ty 12)(scl 8) (nx 0) 0x00000008 __base
[ 11](sec -1)(fl 0x00)(ty 4)(scl 8) (nx 0) 0x0000000c __bufsiz
[ 12](sec -1)(fl 0x00)(ty 4)(scl 8) (nx 0) 0x00000010 __flag
[ 13](sec -1)(fl 0x00)(ty 4)(scl 8) (nx 0) 0x00000014 __file
[ 14](sec -1)(fl 0x00)(ty 12)(scl 8) (nx 0) 0x00000018 __name_to_remove
[ 15](sec -1)(fl 0x00)(ty 4)(scl 8) (nx 0) 0x0000001c __fillsize
[ 16](sec -1)(fl 0x00)(ty 0)(scl 102) (nx 1) 0x00000020 .eos
AUX lnno 0 size 0x20 tagndx 6
[ 18](sec -2)(fl 0x00)(ty 8)(scl 13) (nx 1) 0x00000000 _FILE
AUX lnno 0 size 0x20 tagndx 6
[ 20](sec -2)(fl 0x00)(ty f)(scl 13) (nx 0) 0x00000000 _fpos_t
[ 21](sec -2)(fl 0x00)(ty 4)(scl 13) (nx 0) 0x00000000 _dev_t
[ 22](sec -2)(fl 0x00)(ty 4)(scl 13) (nx 0) 0x00000000 _ino_t
[ 23](sec -2)(fl 0x00)(ty 4)(scl 13) (nx 0) 0x00000000 _mode_t
[ 24](sec -2)(fl 0x00)(ty 4)(scl 13) (nx 0) 0x00000000 _nlink_t
[ 25](sec -2)(fl 0x00)(ty 4)(scl 13) (nx 0) 0x00000000 _gid_t
[ 26](sec -2)(fl 0x00)(ty 4)(scl 13) (nx 0) 0x00000000 _off_t
[ 27](sec -2)(fl 0x00)(ty 4)(scl 13) (nx 0) 0x00000000 _pid_t
[ 28](sec -2)(fl 0x00)(ty 4)(scl 13) (nx 0) 0x00000000 _ssize_t
[ 29](sec -2)(fl 0x00)(ty 4)(scl 13) (nx 0) 0x00000000 _uid_t
[ 30](sec -2)(fl 0x00)(ty 8)(scl 10) (nx 1) 0x00000000 _fd_set
AUX lnno 0 size 0x20 tagndx 0 endndx 36
[ 32](sec -1)(fl 0x00)(ty 3c)(scl 8) (nx 1) 0x00000000 _fd_bits
AUX lnno 0 size 0x20 tagndx 0
[ 34](sec -1)(fl 0x00)(ty 0)(scl 102) (nx 1) 0x00000020 .eos
AUX lnno 0 size 0x20 tagndx 30
[ 36](sec -2)(fl 0x00)(ty 8)(scl 13) (nx 1) 0x00000000 _fd_set
AUX lnno 0 size 0x20 tagndx 30
[ 38](sec -2)(fl 0x00)(ty e)(scl 13) (nx 0) 0x00000000 _time_t
[ 39](sec 1)(fl 0x00)(ty 24)(scl 2) (nx 1) 0x00000008 _main
AUX lnno 96 size 0x0 tagndx 0
_main :
2 : 0xe
5 : 0x15
7 : 0x20
8 : 0x32
9 : 0x39
10 : 0x4a
11 : 0x4d
13 : 0x50
15 : 0x5d
16 : 0x61
[ 41](sec 1)(fl 0x00)(ty 0)(scl 101) (nx 1) 0x00000008 .bf
AUX lnno 5 size 0x0 tagndx 0
[ 43](sec -2)(fl 0x00)(ty 4)(scl 1) (nx 0) 0xfffffffc _fd
[ 44](sec -2)(fl 0x00)(ty 3)(scl 1) (nx 0) 0xfffffffa _dev_info
[ 45](sec 1)(fl 0x00)(ty 0)(scl 101) (nx 1) 0x00000068 .ef
AUX lnno 5 size 0x0 tagndx 0
[ 47](sec 1)(fl 0x00)(ty 0)(scl 3) (nx 1) 0x00000000 .text
AUX scnlen 0x68 nreloc 5 nlnno 11
[ 49](sec 2)(fl 0x00)(ty 0)(scl 3) (nx 1) 0x00000000 .data
AUX scnlen 0x0 nreloc 0 nlnno 0
[ 51](sec 3)(fl 0x00)(ty 0)(scl 3) (nx 1) 0x00000000 .bss
AUX scnlen 0x0 nreloc 0 nlnno 0
[ 53](sec 0)(fl 0x00)(ty 0)(scl 2) (nx 0) 0x00000000 __get_dev_info
[ 54](sec 0)(fl 0x00)(ty 0)(scl 2) (nx 0) 0x00000000 _printf
and the differences between them:
--- out1.txt Wed Jul 28 21:05:28 1999
+++ out2.txt Wed Jul 28 21:05:32 1999
@@ -1,4 +1,4 @@
-main1.o: file format coff-go32
+main2.o: file format coff-go32
SYMBOL TABLE:
@@ -43,5 +43,5 @@
[ 38](sec -2)(fl 0x00)(ty e)(scl 13) (nx 0) 0x00000000 _time_t
[ 39](sec 1)(fl 0x00)(ty 24)(scl 2) (nx 1) 0x00000008 _main
-AUX lnno 96 size 0x0 tagndx 0 endndx 47
+AUX lnno 96 size 0x0 tagndx 0
_main :
2 : 0xe
@@ -57,13 +57,13 @@
[ 41](sec 1)(fl 0x00)(ty 0)(scl 101) (nx 1) 0x00000008 .bf
AUX lnno 5 size 0x0 tagndx 0
-[ 43](sec -1)(fl 0x00)(ty 4)(scl 1) (nx 0) 0xfffffffc _fd
-[ 44](sec -1)(fl 0x00)(ty 3)(scl 1) (nx 0) 0xfffffffa _dev_info
+[ 43](sec -2)(fl 0x00)(ty 4)(scl 1) (nx 0) 0xfffffffc _fd
+[ 44](sec -2)(fl 0x00)(ty 3)(scl 1) (nx 0) 0xfffffffa _dev_info
[ 45](sec 1)(fl 0x00)(ty 0)(scl 101) (nx 1) 0x00000068 .ef
-AUX lnno 16 size 0x0 tagndx 0
+AUX lnno 5 size 0x0 tagndx 0
[ 47](sec 1)(fl 0x00)(ty 0)(scl 3) (nx 1) 0x00000000 .text
AUX scnlen 0x68 nreloc 5 nlnno 11
-[ 49](sec 2)(fl 0x00)(ty 0)(scl 3) (nx 1) 0x00000068 .data
+[ 49](sec 2)(fl 0x00)(ty 0)(scl 3) (nx 1) 0x00000000 .data
AUX scnlen 0x0 nreloc 0 nlnno 0
-[ 51](sec 3)(fl 0x00)(ty 0)(scl 3) (nx 1) 0x00000068 .bss
+[ 51](sec 3)(fl 0x00)(ty 0)(scl 3) (nx 1) 0x00000000 .bss
AUX scnlen 0x0 nreloc 0 nlnno 0
[ 53](sec 0)(fl 0x00)(ty 0)(scl 2) (nx 0) 0x00000000 __get_dev_info
Is this enough to get started? If you need more, let me know.
---
Mark Elbrecht, snowball3@bigfoot.com
http://snowball.frogspace.net/
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: Another script for building binutils
1999-07-28 20:52 Another script for building binutils Mark E.
@ 1999-07-29 11:29 ` Ian Lance Taylor
0 siblings, 0 replies; 4+ messages in thread
From: Ian Lance Taylor @ 1999-07-29 11:29 UTC (permalink / raw)
To: snowball; +Cc: binutils
From: "Mark E." <snowball@snowball.frogspace.net>
Date: Wed, 28 Jul 1999 23:52:37 -0400
There definitely seems to be a problem with -g. Here's a sample program that shows
the problem:
Thanks for the test case and the output.
I'm not seeing what you're seeing. I'm using the target
i386-pc-msdosdjgpp with current sources from the CVS repository. My
results are identical to those you show from the December '98 version
of gas.
What target are you using? How did you run configure? Do you have
any patches at all against the CVS repository?
Your results make me think that you may have configured with
--enable-bfd-assembler. Is that so? That option has been tested for
cygwin, but as far as I know it has not been tested for any straight
i386 COFF target.
Ian
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: Another script for building binutils
1999-07-28 17:27 ` Mark E.
@ 1999-07-28 22:13 ` Ian Lance Taylor
0 siblings, 0 replies; 4+ messages in thread
From: Ian Lance Taylor @ 1999-07-28 22:13 UTC (permalink / raw)
To: snowball3; +Cc: djgpp-workers, binutils
From: "Mark E." <snowball3@bigfoot.com>
Date: Wed, 28 Jul 1999 20:27:45 -0400
I then generated another .s file using 'gcc -g -S main.c' and repeated
the generation of the two .o files. I could debug the main.exe derived
from the Dec. '98 as.exe generated .o file. However, I could only step
one line into the main.exe derived from the Jul. 26th generated .o file.
Run objdump -xs on both files, and see what changed.
Ian
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: Another script for building binutils
[not found] <B0000096305@stargate.astr.lu.lv>
@ 1999-07-28 17:27 ` Mark E.
1999-07-28 22:13 ` Ian Lance Taylor
0 siblings, 1 reply; 4+ messages in thread
From: Mark E. @ 1999-07-28 17:27 UTC (permalink / raw)
To: djgpp-workers, binutils
> Last test were done with binutils snapshots (990727 appears to be
> bad: broken debug info, so I'll perhaps return to 990710 which I
> used for some time).
Hi Andris,
I'm also sending this to binutils so perhaps we can get some help. I
did some testing and found that compiling with -g (for COFF
debugging) doesn't work properly while using -gstabs+ will work with
my sample C program.
How I tested:
I compiled a small C program to an .s file using 'gcc -gstabs+ -S
main.c'. I then used the as.exe from Dec '98 to generate a .o file and an
as.exe from July 26th to do the same but with a different filename. I
was able to step through the generated executables derived from both
.o files with rhgdb.exe.
I then generated another .s file using 'gcc -g -S main.c' and repeated
the generation of the two .o files. I could debug the main.exe derived
from the Dec. '98 as.exe generated .o file. However, I could only step
one line into the main.exe derived from the Jul. 26th generated .o file.
Andris, is this something like what you found?
If this is something that only happened very recently, the cause should
be easily traceable.
BTW, I made sure to disable long section support and my alignment
patch #2 before testing.
Mark
---
Mark Elbrecht, snowball3@bigfoot.com
http://snowball.frogspace.net/
^ permalink raw reply [flat|nested] 4+ messages in thread
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1999-07-28 20:52 Another script for building binutils Mark E.
1999-07-29 11:29 ` Ian Lance Taylor
[not found] <B0000096305@stargate.astr.lu.lv>
1999-07-28 17:27 ` Mark E.
1999-07-28 22:13 ` Ian Lance Taylor
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