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author | Ingo Molnar <mingo@elte.hu> | 2008-08-14 12:19:59 +0200 |
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committer | Ingo Molnar <mingo@elte.hu> | 2008-08-14 12:19:59 +0200 |
commit | 8d7ccaa545490cdffdfaff0842436a8dd85cf47b (patch) | |
tree | 8129b5907161bc6ae26deb3645ce1e280c5e1f51 /arch/powerpc/kernel/process.c | |
parent | b2139aa0eec330c711c5a279db361e5ef1178e78 (diff) | |
parent | 30a2f3c60a84092c8084dfe788b710f8d0768cd4 (diff) | |
download | linux-8d7ccaa545490cdffdfaff0842436a8dd85cf47b.tar.gz linux-8d7ccaa545490cdffdfaff0842436a8dd85cf47b.tar.bz2 linux-8d7ccaa545490cdffdfaff0842436a8dd85cf47b.zip |
Merge commit 'v2.6.27-rc3' into x86/prototypes
Conflicts:
include/asm-x86/dma-mapping.h
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/powerpc/kernel/process.c')
-rw-r--r-- | arch/powerpc/kernel/process.c | 48 |
1 files changed, 46 insertions, 2 deletions
diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c index 219f3634115e..957bded0020d 100644 --- a/arch/powerpc/kernel/process.c +++ b/arch/powerpc/kernel/process.c @@ -47,6 +47,8 @@ #ifdef CONFIG_PPC64 #include <asm/firmware.h> #endif +#include <linux/kprobes.h> +#include <linux/kdebug.h> extern unsigned long _get_SP(void); @@ -239,21 +241,53 @@ void discard_lazy_cpu_state(void) } #endif /* CONFIG_SMP */ +void do_dabr(struct pt_regs *regs, unsigned long address, + unsigned long error_code) +{ + siginfo_t info; + + if (notify_die(DIE_DABR_MATCH, "dabr_match", regs, error_code, + 11, SIGSEGV) == NOTIFY_STOP) + return; + + if (debugger_dabr_match(regs)) + return; + + /* Clear the DAC and struct entries. One shot trigger */ +#if defined(CONFIG_BOOKE) + mtspr(SPRN_DBCR0, mfspr(SPRN_DBCR0) & ~(DBSR_DAC1R | DBSR_DAC1W + | DBCR0_IDM)); +#endif + + /* Clear the DABR */ + set_dabr(0); + + /* Deliver the signal to userspace */ + info.si_signo = SIGTRAP; + info.si_errno = 0; + info.si_code = TRAP_HWBKPT; + info.si_addr = (void __user *)address; + force_sig_info(SIGTRAP, &info, current); +} + static DEFINE_PER_CPU(unsigned long, current_dabr); int set_dabr(unsigned long dabr) { __get_cpu_var(current_dabr) = dabr; -#ifdef CONFIG_PPC_MERGE /* XXX for now */ if (ppc_md.set_dabr) return ppc_md.set_dabr(dabr); -#endif /* XXX should we have a CPU_FTR_HAS_DABR ? */ #if defined(CONFIG_PPC64) || defined(CONFIG_6xx) mtspr(SPRN_DABR, dabr); #endif + +#if defined(CONFIG_BOOKE) + mtspr(SPRN_DAC1, dabr); +#endif + return 0; } @@ -337,6 +371,12 @@ struct task_struct *__switch_to(struct task_struct *prev, if (unlikely(__get_cpu_var(current_dabr) != new->thread.dabr)) set_dabr(new->thread.dabr); +#if defined(CONFIG_BOOKE) + /* If new thread DAC (HW breakpoint) is the same then leave it */ + if (new->thread.dabr) + set_dabr(new->thread.dabr); +#endif + new_thread = &new->thread; old_thread = ¤t->thread; @@ -525,6 +565,10 @@ void flush_thread(void) if (current->thread.dabr) { current->thread.dabr = 0; set_dabr(0); + +#if defined(CONFIG_BOOKE) + current->thread.dbcr0 &= ~(DBSR_DAC1R | DBSR_DAC1W); +#endif } } |