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Re: Jeeni & ARM720T with GDB
- To: fnasser at cygnus dot com
- Subject: Re: Jeeni & ARM720T with GDB
- From: "danish iftikhar" <d_iftikhar at hotmail dot com>
- Date: Wed, 22 Nov 2000 10:35:04 -0000
- Cc: grante at visi dot com, gdb at sourceware dot cygnus dot com
>From: Fernando Nasser <fnasser@cygnus.com>
>To: danish iftikhar <d_iftikhar@hotmail.com>
>CC: grante@visi.com
>Subject: Re: Jeeni & ARM720T with GDB
>Date: Wed, 22 Nov 2000 07:30:20 +0000
>
>Danish,
>
>I believe we need mode information. The log seems normal to me.
>
>What is the value of the PC (P/x $pc) after the load?
>
>Can you do a "x/30i $pc" so we see the startup code?
>
>When you do "break main", what is printed?
>
>And, maybe before all that, what was the exact command you've used to
>compile?
>
>What is the output when you add "-v" to your gcc command?
>
>Fernando
>
***************************************************
Hi
i am enclosing all the information that u have asked for :
arm-elf-gcc -v
Reading specs from
/proj/danish/ECOS_EP7211/tools/H-i686-pc-linux-gnu/lib/gcc-lib/arm-elf/2.95.2/specs
gcc version 2.95.2 19991024 (release)
the command i am using to compile is :
CXX = arm-elf-gcc -mcpu=arm7tdmi -D__EDB7211
arm-elf-gdb -v
GNU gdb 5.0
Copyright 2000 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain
conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB. Type "show warranty" for details.
This GDB was configured as "--host=i686-pc-linux-gnu --target=arm-elf".
After load Pc shows the address : 0x8060
The start uo code is :
(gdb) x/30i $pc
0x8060 <warm_reset>: mrs r7, cpsr
0x8064 <warm_reset+4>: and r7, r7, #31 ; 0x1f
0x8068 <warm_reset+8>: cmp r7, #19 ; 0x13
0x806c <warm_reset+12>: beq 0x80a0 <start>
0x8070 <warm_reset+16>: mov r0, #0 ; 0x0
0x8074 <warm_reset+20>: str r0, [r0, #64]
0x8078 <warm_reset+24>: ldr r1, [pc, #4c0] ; 0x8540 <_eCos_id+20>
0x807c <warm_reset+28>: ldr r2, [r1, #4]
0x8080 <warm_reset+32>: str r2, [r0, #4]
0x8084 <warm_reset+36>: ldr r2, [r1, #36]
0x8088 <warm_reset+40>: str r2, [r0, #36]
0x808c <warm_reset+44>: ldr r2, [r1, #8]
0x8090 <warm_reset+48>: str r2, [r0, #8]
0x8094 <warm_reset+52>: ldr r2, [r1, #64]
0x8098 <warm_reset+56>: str r2, [r0, #40]
0x809c <warm_reset+60>: swi 0x00000000
0x80a0 <start>: ldr r0, [pc, #474] ; 0x851c <.init_flag>
0x80a4 <start+4>: ldr r1, [r0]
0x80a8 <start+8>: cmp r1, #0 ; 0x0
0x80ac <start+12>: bne 0x80a8 <start+8>
0x80b0 <start+16>: ldr r1, [pc, #c8] ; 0x8180 <init_done>
0x80b4 <start+20>: str r1, [r0]
0x80b8 <start+24>: mov r0, #0 ; 0x0
0x80bc <start+28>: ldr r1, [pc, #454] ; 0x8518
<.__exception_handlers>
0x80c0 <start+32>: cmp r7, #19 ; 0x13
0x80c4 <start+36>: beq 0x80d0 <start+48>
0x80c8 <start+40>: ldr r2, [r1, #40]
0x80cc <start+44>: str r2, [r0, #40]
0x80d0 <start+48>: ldr r2, [r1, #24]
0x80d4 <start+52>: str r2, [r0, #24]
i am not able to do step or cont but using stepi i went through this
startup function . It seems to loop around between 0x815c & 0x8164 and is
not going ahead of that .
the code at this address is as follows :
0x8154 <start+180>: cmp r1, r2
- 0x8158 <start+184>: beq 0x8168 <start+200>
- 0x815c <start+188>: str r0, [r1], #4
- 0x8160 <start+192>: cmp r1, r2
- 0x8164 <start+196>: bne 0x815c <start+188>
- 0x8168 <start+200>: bl 0x1f194 <hal_hardware_init>
- 0x816c <start+204>: bl 0x1ee10
<cyg_hal_invoke_constructors>
- 0x8170 <start+208>: bl 0x1f358 <cyg_start>
umm when i do a break main , the reply is :
gdb) break main
Breakpoint 1 at 0x8558: file App.c
Hoping to get an early reply from your side
thanks
danish.
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