[#6070] can't access scratchpad sram in bfin-uclinux-gdb in MPU
Submitted By: Barry Song
Open Date
2010-06-17 05:31:13 Close Date
2010-06-21 06:23:00
Priority:
Medium Assignee:
Barry Song
Status:
Closed Fixed In Release:
N/A
Found In Release:
2010R1 Release:
Category:
N/A Board:
N/A
Processor:
BF537 Silicon Revision:
Is this bug repeatable?:
Yes Resolution:
Fixed
Uboot version or rev.:
Toolchain version or rev.:
4.3.4 (ADI-trunk/svn-3771)
App binary format:
N/A
Summary: can't access scratchpad sram in bfin-uclinux-gdb in MPU
Details:
(gdb) c
Continuing.
Breakpoint 3, __uClibc_main (main=0x3d6815c <main>, argc=1, argv=0xffb00f80, app_init=Cannot access memory at address 0xffb00f6c
) at libc/misc/internals/__uClibc_main.c:278
278 libc/misc/internals/__uClibc_main.c: No such file or directory.
in libc/misc/internals/__uClibc_main.c
Current language: auto; currently c
(gdb) p *argv
Cannot access memory at address 0xffb00f80
(gdb) p *0xffb00f78
Cannot access memory at address 0xffb00f78
L1 is always covered by PLD entry in fact. For example:
test.c
printf("%08x\n", *((unsigned int *)0xffb00f78));
root:/> ./test
03d6760c
Follow-ups
--- Mike Frysinger 2010-06-17 13:06:55
gdb goes through ptrace, so double check to make sure the kernel ptrace function
isnt blocking the request
--- Barry Song 2010-06-18 05:50:56
Why you always give some comments all people know just like before checking ECC,
erase nand?
--- Mike Frysinger 2010-06-18 09:58:27
just trying to help
--- Barry Song 2010-06-21 06:20:16
Fixed. permit to access scratchpad sram stack gdb
(gdb) c
Continuing.
Breakpoint 1, __uClibc_main (main=0x3d3815c <main>, argc=1,
argv=0xffb00f80, app_init=0x3d3bb34 <_init>, app_fini=0x3d3bb46
<_fini>,
rtld_fini=0, stack_end=0x3d3360c) at
libc/misc/internals/__uClibc_main.c:278
278 libc/misc/internals/__uClibc_main.c: No such file or directory.
in libc/misc/internals/__uClibc_main.c
Current language: auto; currently c
(gdb) info reg sp
sp 0xffb00f30 0xffb00f30
(gdb) p *0xffb00f30
$1 = 61780680
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