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Blackfin arch: fix 2 bugs related to debug

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- unable to single step over emuexcpt instruction
 - gdbproxy goes into infinite loop when doing gdb does "next" over
   "emuexcpt"

Don't decrement PC after software breakpoint.

Signed-off-by: Jie Zhang <jie.zhang@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
This commit is contained in:
Jie Zhang
2009-02-04 16:49:45 +08:00
committed by Bryan Wu
parent 1c302b6ccb
commit 3aee91bafe
1 changed files with 1 additions and 8 deletions
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9
arch/blackfin/mach-common/entry.S
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@@ -151,13 +151,6 @@ ENTRY(_ex_syscall)
jump.s _bfin_return_from_exception; jump.s _bfin_return_from_exception;
ENDPROC(_ex_syscall) ENDPROC(_ex_syscall)
ENTRY(_ex_soft_bp)
r7 = retx;
r7 += -2;
retx = r7;
jump.s _ex_trap_c;
ENDPROC(_ex_soft_bp)
ENTRY(_ex_single_step) ENTRY(_ex_single_step)
/* If we just returned from an interrupt, the single step event is /* If we just returned from an interrupt, the single step event is
for the RTI instruction. */ for the RTI instruction. */
@@ -1087,7 +1080,7 @@ ENTRY(_ex_table)
* EXCPT instruction can provide 4 bits of EXCAUSE, allowing 16 to be user defined * EXCPT instruction can provide 4 bits of EXCAUSE, allowing 16 to be user defined
*/ */
.long _ex_syscall /* 0x00 - User Defined - Linux Syscall */ .long _ex_syscall /* 0x00 - User Defined - Linux Syscall */
.long _ex_soft_bp /* 0x01 - User Defined - Software breakpoint */ .long _ex_trap_c /* 0x01 - User Defined - Software breakpoint */
#ifdef CONFIG_KGDB #ifdef CONFIG_KGDB
.long _ex_trap_c /* 0x02 - User Defined - KGDB initial connection .long _ex_trap_c /* 0x02 - User Defined - KGDB initial connection
and break signal trap */ and break signal trap */