diff options
Diffstat (limited to 'arch/arm/kernel/kgdb.c')
| -rw-r--r-- | arch/arm/kernel/kgdb.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/arch/arm/kernel/kgdb.c b/arch/arm/kernel/kgdb.c index a74b53c1b7d..07db2f8a1b4 100644 --- a/arch/arm/kernel/kgdb.c +++ b/arch/arm/kernel/kgdb.c @@ -12,8 +12,12 @@ #include <linux/irq.h> #include <linux/kdebug.h> #include <linux/kgdb.h> +#include <linux/uaccess.h> + #include <asm/traps.h> +#include "patch.h" + struct dbg_reg_def_t dbg_reg_def[DBG_MAX_REG_NUM] = { { "r0", 4, offsetof(struct pt_regs, ARM_r0)}, @@ -244,6 +248,31 @@ void kgdb_arch_exit(void) unregister_die_notifier(&kgdb_notifier); } +int kgdb_arch_set_breakpoint(struct kgdb_bkpt *bpt) +{ + int err; + + /* patch_text() only supports int-sized breakpoints */ + BUILD_BUG_ON(sizeof(int) != BREAK_INSTR_SIZE); + + err = probe_kernel_read(bpt->saved_instr, (char *)bpt->bpt_addr, + BREAK_INSTR_SIZE); + if (err) + return err; + + patch_text((void *)bpt->bpt_addr, + *(unsigned int *)arch_kgdb_ops.gdb_bpt_instr); + + return err; +} + +int kgdb_arch_remove_breakpoint(struct kgdb_bkpt *bpt) +{ + patch_text((void *)bpt->bpt_addr, *(unsigned int *)bpt->saved_instr); + + return 0; +} + /* * Register our undef instruction hooks with ARM undef core. * We regsiter a hook specifically looking for the KGB break inst |