diff options
author | Ingo Molnar <mingo@elte.hu> | 2008-10-28 16:54:49 +0100 |
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committer | Ingo Molnar <mingo@elte.hu> | 2008-10-28 16:54:49 +0100 |
commit | d1a76187a5be4f89c6cb19d800cb5fb7aac735c5 (patch) | |
tree | 2fac3ffbfffc7560eeef8364b541d0d7a0057920 /arch/mips/kernel/traps.c | |
parent | c7e78cff6b7518212247fb20b1dc6411540dc9af (diff) | |
parent | 0173a3265b228da319ceb9c1ec6a5682fd1b2d92 (diff) |
Merge commit 'v2.6.28-rc2' into core/locking
Conflicts:
arch/um/include/asm/system.h
Diffstat (limited to 'arch/mips/kernel/traps.c')
-rw-r--r-- | arch/mips/kernel/traps.c | 30 |
1 files changed, 23 insertions, 7 deletions
diff --git a/arch/mips/kernel/traps.c b/arch/mips/kernel/traps.c index 5fd0cd020af..80b9e070c20 100644 --- a/arch/mips/kernel/traps.c +++ b/arch/mips/kernel/traps.c @@ -42,6 +42,7 @@ #include <asm/tlbdebug.h> #include <asm/traps.h> #include <asm/uaccess.h> +#include <asm/watch.h> #include <asm/mmu_context.h> #include <asm/types.h> #include <asm/stacktrace.h> @@ -825,8 +826,10 @@ static void mt_ase_fp_affinity(void) if (cpus_intersects(current->cpus_allowed, mt_fpu_cpumask)) { cpumask_t tmask; - cpus_and(tmask, current->thread.user_cpus_allowed, - mt_fpu_cpumask); + current->thread.user_cpus_allowed + = current->cpus_allowed; + cpus_and(tmask, current->cpus_allowed, + mt_fpu_cpumask); set_cpus_allowed(current, tmask); set_thread_flag(TIF_FPUBOUND); } @@ -910,13 +913,26 @@ asmlinkage void do_mdmx(struct pt_regs *regs) asmlinkage void do_watch(struct pt_regs *regs) { + u32 cause; + /* - * We use the watch exception where available to detect stack - * overflows. + * Clear WP (bit 22) bit of cause register so we don't loop + * forever. */ - dump_tlb_all(); - show_regs(regs); - panic("Caught WATCH exception - probably caused by stack overflow."); + cause = read_c0_cause(); + cause &= ~(1 << 22); + write_c0_cause(cause); + + /* + * If the current thread has the watch registers loaded, save + * their values and send SIGTRAP. Otherwise another thread + * left the registers set, clear them and continue. + */ + if (test_tsk_thread_flag(current, TIF_LOAD_WATCH)) { + mips_read_watch_registers(); + force_sig(SIGTRAP, current); + } else + mips_clear_watch_registers(); } asmlinkage void do_mcheck(struct pt_regs *regs) |