forums.ps2dev.org Forum Index forums.ps2dev.org
Homebrew PS2, PSP & PS3 Development Discussions
 
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

[Solved] Wrong line numbers - Bug in psp-objdump?

 
Post new topic   Reply to topic    forums.ps2dev.org Forum Index -> PSP Development
View previous topic :: View next topic  
Author Message
CrazyT



Joined: 23 Dec 2006
Posts: 18
PostPosted: Mon Jan 05, 2009 11:34 pm    Post subject: [Solved] Wrong line numbers - Bug in psp-objdump? Reply with quote
Hi, i have a question that probably nobody asked before.

I'm using the sdk-example "sprite" in samples/gu folder:
http://c.pastebin.com/f1227a361

I modified the Makefiles.sample to build debuginformation inside:
CFLAGS = -Wall -O2 -g

But when i use "psp-objdump -D -l sprite.elf>output.txt" it seems to have wrong line numbers inside the output.txt.

Here is a little example:
Code:
/cygdrive/e/Programme/psptoolchain/build/pspsdk/src/samples/gu/sprite/sprite.c:75
     41c:   8fa30054    lw   v1,84(sp)
     420:   0460010d    bltz   v1,858 <main+0x4ac>
     424:   8fa20054    lw   v0,84(sp)
     428:   44830000    mtc1   v1,$f0
     42c:   00000000    nop
     430:   46800520    cvt.s.w   $f20,$f0
     434:   461aa500    add.s   $f20,$f20,$f26
/cygdrive/e/Programme/psptoolchain/build/pspsdk/src/samples/gu/sprite/sprite.c:68
     438:   afa00050    sw   zero,80(sp)
/cygdrive/e/Programme/psptoolchain/build/pspsdk/src/samples/gu/sprite/sprite.c:75
     43c:   4618a502    mul.s   $f20,$f20,$f24
/cygdrive/e/Programme/psptoolchain/build/pspsdk/src/samples/gu/sprite/sprite.c:68
     440:   0c000a5f    jal   297c <cosf>
     444:   4600a306    mov.s   $f12,$f20
     448:   4600a306    mov.s   $f12,$f20
     44c:   0c000aa1    jal   2a84 <sinf>
     450:   46190580    add.s   $f22,$f0,$f25


As you may see, the line number 68 appears several times.
The cosinus(cosf) function is on line 82, but it shows line 68, wich confuses me a bit.
I just write this, because i want to create a program that fetches the line numbers and offsets, so that you can set breakpoints inside a c-source-file and debug it with that.
But with this wrong line information my debugger just jumps to wrong lines.

Note:
This bug also seems to happen for psp-addr2line:

Code:
sh-3.2$ psp-addr2line.exe -e  sprite.elf 440
/cygdrive/e/Programme/psptoolchain/build/pspsdk/src/samples/gu/sprite/sprite.c:68


Read on the wiki that you also need that information:
Code:
sh-3.2$ psp-gcc.exe -v
Using built-in specs.
Target: psp
Configured with: ../configure --prefix=/usr/local/pspdev --target=psp --enable-l
anguages=c,c++ --with-newlib --with-gmp --with-mpfr --enable-cxx-flags=-G0
Thread model: single
gcc version 4.3.2 (GCC)

sh-3.2$ psp-objdump.exe -v
GNU objdump 2.16.1 (PSPDEV 20060116)
Copyright 2005 Free Software Foundation, Inc.


Last edited by CrazyT on Tue Jan 06, 2009 3:06 am; edited 1 time in total
Back to top
View user's profile Send private message
jbit
Site Admin


Joined: 28 May 2005
Posts: 293
Location: København, Danmark
PostPosted: Tue Jan 06, 2009 12:14 am    Post subject: Reply with quote
Optimized code output will never match up perfectly with C, using -O0 will help (but will produce slower code).
Back to top
View user's profile Send private message Visit poster's website
CrazyT



Joined: 23 Dec 2006
Posts: 18
PostPosted: Tue Jan 06, 2009 12:23 am    Post subject: Reply with quote
Forgot to mention that i also used "BUILD_PRX=1" in the makefile.
If i do not use it, it shows linenumbers correctly, no idea why.

EDIT:
Using -O0 seems to work!
Thanks mate.
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic    forums.ps2dev.org Forum Index -> PSP Development All times are GMT + 10 Hours
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


Powered by phpBB © 2001, 2005 phpBB Group