Using cross compiled GDB under Emacs

Using cross compiled GDB under Emacs

[Dmytro Bablinyuk]

I have cross compiled gdb and I can set a break point under emacs using 
'C-x space' but when gdb stops at breakpoint Emacs does not show the 
line where gdb stopped. If I use 'b' command - the same, Emacs does not 
show the file and line where it stopped. If I try to see line info it 
says that no line number available.
Here is dump:

There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "--host=i386-pc-linux-gnu 
--target=powerpc-linux-uclibc"...0xfff00100 in ?? ()

(gdb) ram
add symbol table from file "u-boot" at
	.text_addr = 0x3fc7000
(gdb) b board_init_r
Breakpoint 1 at 0x3fcba28: file board.c, line 588.
(gdb) c
Continuing.

Breakpoint 1, <signal handler called>
(gdb) info line
No line number information available.
(gdb)

Does anybody know how to 'attach' emacs to gdb?
The program was compiled with these options
-ggdb  -Os   -fPIC -ffixed-r14 -meabi -D__KERNEL__ 
-DTEXT_BASE=0xFFF00000 -fno-builtin -ffreestanding -nostdinc -isystem 
-pipe  -DCONFIG_PPC -D__powerpc__ -DCONFIG_8260 -DCONFIG_CPM2 -ffixed-r2 
-ffixed-r29 -mstring -mcpu=603e -mmultiple -Wall -Wstrict-prototypes

Thank you

Re: Using cross compiled GDB under Emacs

[Dmytro Bablinyuk]

> Does anybody know how to 'attach' emacs to gdb?
> The program was compiled with these options
> -ggdb  -Os   -fPIC -ffixed-r14 -meabi -D__KERNEL__ 
> -DTEXT_BASE=0xFFF00000 -fno-builtin -ffreestanding -nostdinc -isystem 
> -pipe  -DCONFIG_PPC -D__powerpc__ -DCONFIG_8260 -DCONFIG_CPM2 -ffixed-r2 
> -ffixed-r29 -mstring -mcpu=603e -mmultiple -Wall -Wstrict-prototypes
Also the problem is with 's' and 'n' commands.
If I type
(gdb) s
it will never stop and will simply keep going until I reset JTAG.

(gdb) s

Program received signal 0, Signal 0.
<signal handler called>
(gdb) info line *(0x03fcbae8)
Line 626 of "board.c" starts at address 0x3fcbae0 <board_init_r+184> and 
ends at 0x3fcbaec <board_init_r+196>.
(gdb)

The GDB version 6.3
I would be very grateful for advice

Thank you

Re: Using cross compiled GDB under Emacs

[Daniel Jacobowitz]

On Thu, Oct 06, 2005 at 12:14:55PM +1000, Dmytro Bablinyuk wrote:
> 
> >Does anybody know how to 'attach' emacs to gdb?
> >The program was compiled with these options
> >-ggdb  -Os   -fPIC -ffixed-r14 -meabi -D__KERNEL__ 
> >-DTEXT_BASE=0xFFF00000 -fno-builtin -ffreestanding -nostdinc -isystem 
> >-pipe  -DCONFIG_PPC -D__powerpc__ -DCONFIG_8260 -DCONFIG_CPM2 -ffixed-r2 
> >-ffixed-r29 -mstring -mcpu=603e -mmultiple -Wall -Wstrict-prototypes
> Also the problem is with 's' and 'n' commands.
> If I type
> (gdb) s
> it will never stop and will simply keep going until I reset JTAG.
> 
> (gdb) s
> 
> Program received signal 0, Signal 0.
> <signal handler called>

This looks like your remote debugging stub/setup is just broken.  GDB
should not be detecting either signal 0, or signal handlers.

-- 
Daniel Jacobowitz
CodeSourcery, LLC