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kgdb,arm: fix register dump

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DBG_MAX_REG_NUM incorrectly had the number of indices in the GDB regs
array rather than the number of registers, leading to an oops when the
"rd" command is used in KDB.

Cc: stable@kernel.org
Signed-off-by: Rabin Vincent <rabin@rab.in>
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
This commit is contained in:
Rabin Vincent 2010-10-26 12:49:00 -05:00 committed by Jason Wessel
parent 931ea24819
commit 834b2964b7
2 changed files with 4 additions and 3 deletions
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5
arch/arm/include/asm/kgdb.h
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@ -70,7 +70,8 @@ extern int kgdb_fault_expected;
#define _GP_REGS 16
#define _FP_REGS 8
#define _EXTRA_REGS 2
#define DBG_MAX_REG_NUM (_GP_REGS + (_FP_REGS * 3) + _EXTRA_REGS)
#define GDB_MAX_REGS (_GP_REGS + (_FP_REGS * 3) + _EXTRA_REGS)
#define DBG_MAX_REG_NUM (_GP_REGS + _FP_REGS + _EXTRA_REGS)
#define KGDB_MAX_NO_CPUS 1
#define BUFMAX 400
@ -93,7 +94,7 @@ extern int kgdb_fault_expected;
#define _SPT 13
#define _LR 14
#define _PC 15
#define _CPSR (DBG_MAX_REG_NUM - 1)
#define _CPSR (GDB_MAX_REGS - 1)
/*
* So that we can denote the end of a frame for tracing,

2
arch/arm/kernel/kgdb.c
View file

@ -79,7 +79,7 @@ sleeping_thread_to_gdb_regs(unsigned long *gdb_regs, struct task_struct *task)
return;
/* Initialize to zero */
for (regno = 0; regno < DBG_MAX_REG_NUM; regno++)
for (regno = 0; regno < GDB_MAX_REGS; regno++)
gdb_regs[regno] = 0;
/* Otherwise, we have only some registers from switch_to() */