Re: [parisc-linux] new toolchain (binutils 2.15, gcc 3.5, glibc 2.3.3) progress

["Joel Soete" <soete.joel@tiscali.be>]

Carlos,

SOme news (but didn't help me :(

> -- Original Message --
> Date: Sat, 03 Jul 2004 12:01:18 +0000
> From: Joel Soete <soete.joel@tiscali.be>
> To: Carlos O'Donell <carlos@baldric.uwo.ca>
> Cc: parisc-linux@parisc-linux.org
> Subject: Re: [parisc-linux] new toolchain (binutils 2.15, gcc 3.5, glib=
c
> 2.3.3)
> 	progress
> 
> 
> 
> 
> Carlos O'Donell wrote:
> >>I can now reproduce what happend during check :)
> >>and the crash occurs now at 0x401f67a8
> >>
> >>and ddd offers me a related dump window:
> >>Dump of assembler code from 0x401f67a8 to 0x401f68a8:
> >>    0x401f67a8:     ldw 0(,r25),r21
> >>    0x401f67ac:     ldo 1115(r20),r20
> > 
> > 
> > Joel, the most important code is what came *before* teh crash insn,
you
> > usually want atleast 16-32 insns before the crash to see what was goi=
ng
> > on, usually I trace back to try find the start of the function.
> > 
> > 
> >>0002c77c <_nl_intern_locale_data>:
> >>   2c77c:       6b c2 3f d9     stw rp,-14(,sp)
> >>   2c780:       6f c6 00 80     stw,ma r6,40(,sp)
> >>   2c784:       08 1a 02 46     copy r26,r6
> >>   2c788:       6b c5 3f 89     stw r5,-3c(,sp)
> >>   2c78c:       08 19 02 45     copy r25,r5
> >>   2c790:       6b c3 3f 99     stw r3,-34(,sp)
> >>   2c794:       08 18 02 43     copy r24,r3
> >>   2c798:       6b c4 3f 91     stw r4,-38(,sp)
> >>   2c79c:       8f 0e 81 d0     cmpib,>>=3D 7,r24,2c88c <_nl_intern_l=
ocale_data+0x110>
> >>   2c7a0:       6b d3 3f c1     stw r19,-20(,sp)
> >>   2c7a4:       22 98 04 00     ldil 20030000,r20
> >>=3D=3D>2c7a8:       0f 20 10 95     ldw 0(,r25),r21
> > 
for a run i got r25=3D=3D0x4004b000

and the corresponding mapping at this moment is:
00010000-00011000 r-xp 00000000 08:0b 142497     /Develop/parisc-linux/bu=
ild/glibc/localedata/tst-leaks
00020000-00021000 rwxp 00000000 08:0b 142497     /Develop/parisc-linux/bu=
ild/glibc/localedata/tst-leaks
40000000-40004000 rw-p 40000000 00:00 0 
4004b000-4004c000 r--p 00000000 08:0b 2632       /Develop/parisc-linux/bu=
ild/glibc/localedata/de_DE.ISO-8859-1/LC_IDENTIFICATION
403eb000-40529000 r-xp 00000000 08:0b 18692      /Develop/parisc-linux/bu=
ild/glibc/libc.so
40529000-40536000 rwxp 0012e000 08:0b 18692      /Develop/parisc-linux/bu=
ild/glibc/libc.so
40536000-40538000 rwxp 40536000 00:00 0 
410bd000-410d4000 r-xp 00000000 08:0b 196300     /Develop/parisc-linux/bu=
ild/glibc/elf/ld.so
410e3000-410e7000 rwxp 00016000 08:0b 196300     /Develop/parisc-linux/bu=
ild/glibc/elf/ld.so
410e7000-41108000 rwxp 410e7000 00:00 0 
bff00000-bff02000 rwxp bff00000 00:00 0 

I try to compare with glibc build with gcc-3.3.4 (that takes me some time=

to remember That I have also to upgrade my kernel to make gdb stop at a
break point :( ) and I got the same matching r25 =3D=3D map address of /D=
evelop/parisc-linux/build/glibc/localedata/de_DE.ISO-8859-1/LC_IDENTIFICA=
TION.
But with gcc-3.3.4 that can continue not with gcc-3.5????

What do I miss?

> > 
> > You are trying to get data from a pointer passed in as the second
> > parameter to the function, you want to see the value of r25 before th=
e
> > load to see if it is valid. In gdb you can print register values or
just
> > use the info command to see all the regs. You can display regs by usi=
ng
> > '$r25' AFAIR, though the format may vary.
> > 
> ah I see
> And btw if I put a break at 0x401f677c (corresponding to line 2c77c: th=
e
> first routine insn), I would also be able to find the 
> address from where it's called (just have to find back the right regist=
er).

umm, at this place 'info reg' gave me (among other stuff :) )
rp             0x404179f3
r31            0x404179d7

(rp=3D=3Dr2 if i well understand)

do you remember what is the right calling adress?

Thanks again,
    Joel


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