diff options
| author | Andreas Schwab <schwab@linux-m68k.org> | 2010-11-27 14:24:53 +0000 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2010-12-09 15:35:31 +1100 |
| commit | 4dfbf290aeb9d63a058d9d8237203b0b72bfbbe3 (patch) | |
| tree | 8619b01893ddc4222738ae2aada3605f56f2bd4a /arch/powerpc | |
| parent | 364a1246522f99cbe58040e99af007ada31034ed (diff) | |
powerpc: Fix PPC_PTRACE_SETHWDEBUG on PPC_BOOK3S
Properly set the DABR_TRANSLATION/DABR_DATA_READ/DABR_DATA_READ bits in
the dabr when setting the debug register via PPC_PTRACE_SETHWDEBUG. Also
don't reject trigger type of PPC_BREAKPOINT_TRIGGER_READ.
Signed-off-by: Andreas Schwab <schwab@linux-m68k.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc')
| -rw-r--r-- | arch/powerpc/kernel/ptrace.c | 22 |
1 files changed, 16 insertions, 6 deletions
diff --git a/arch/powerpc/kernel/ptrace.c b/arch/powerpc/kernel/ptrace.c index a9b32967cff6..906536998291 100644 --- a/arch/powerpc/kernel/ptrace.c +++ b/arch/powerpc/kernel/ptrace.c @@ -1316,6 +1316,10 @@ static int set_dac_range(struct task_struct *child, static long ppc_set_hwdebug(struct task_struct *child, struct ppc_hw_breakpoint *bp_info) { +#ifndef CONFIG_PPC_ADV_DEBUG_REGS + unsigned long dabr; +#endif + if (bp_info->version != 1) return -ENOTSUPP; #ifdef CONFIG_PPC_ADV_DEBUG_REGS @@ -1353,11 +1357,10 @@ static long ppc_set_hwdebug(struct task_struct *child, /* * We only support one data breakpoint */ - if (((bp_info->trigger_type & PPC_BREAKPOINT_TRIGGER_RW) == 0) || - ((bp_info->trigger_type & ~PPC_BREAKPOINT_TRIGGER_RW) != 0) || - (bp_info->trigger_type != PPC_BREAKPOINT_TRIGGER_WRITE) || - (bp_info->addr_mode != PPC_BREAKPOINT_MODE_EXACT) || - (bp_info->condition_mode != PPC_BREAKPOINT_CONDITION_NONE)) + if ((bp_info->trigger_type & PPC_BREAKPOINT_TRIGGER_RW) == 0 || + (bp_info->trigger_type & ~PPC_BREAKPOINT_TRIGGER_RW) != 0 || + bp_info->addr_mode != PPC_BREAKPOINT_MODE_EXACT || + bp_info->condition_mode != PPC_BREAKPOINT_CONDITION_NONE) return -EINVAL; if (child->thread.dabr) @@ -1366,7 +1369,14 @@ static long ppc_set_hwdebug(struct task_struct *child, if ((unsigned long)bp_info->addr >= TASK_SIZE) return -EIO; - child->thread.dabr = (unsigned long)bp_info->addr; + dabr = (unsigned long)bp_info->addr & ~7UL; + dabr |= DABR_TRANSLATION; + if (bp_info->trigger_type & PPC_BREAKPOINT_TRIGGER_READ) + dabr |= DABR_DATA_READ; + if (bp_info->trigger_type & PPC_BREAKPOINT_TRIGGER_WRITE) + dabr |= DABR_DATA_WRITE; + + child->thread.dabr = dabr; return 1; #endif /* !CONFIG_PPC_ADV_DEBUG_DVCS */ |