diff options
| -rw-r--r-- | arch/sparc/include/asm/ptrace_64.h | 8 | ||||
| -rw-r--r-- | arch/sparc64/kernel/process.c | 36 | ||||
| -rw-r--r-- | arch/sparc64/mm/ultra.S | 7 |
3 files changed, 40 insertions, 11 deletions
diff --git a/arch/sparc/include/asm/ptrace_64.h b/arch/sparc/include/asm/ptrace_64.h index ec6d45c84cd0..390d92ac67cf 100644 --- a/arch/sparc/include/asm/ptrace_64.h +++ b/arch/sparc/include/asm/ptrace_64.h @@ -134,9 +134,9 @@ struct global_reg_snapshot { unsigned long tnpc; unsigned long o7; unsigned long i7; + unsigned long rpc; struct thread_info *thread; unsigned long pad1; - unsigned long pad2; }; #define __ARCH_WANT_COMPAT_SYS_PTRACE @@ -315,9 +315,9 @@ extern void __show_regs(struct pt_regs *); #define GR_SNAP_TNPC 0x10 #define GR_SNAP_O7 0x18 #define GR_SNAP_I7 0x20 -#define GR_SNAP_THREAD 0x28 -#define GR_SNAP_PAD1 0x30 -#define GR_SNAP_PAD2 0x38 +#define GR_SNAP_RPC 0x28 +#define GR_SNAP_THREAD 0x30 +#define GR_SNAP_PAD1 0x38 #endif /* __KERNEL__ */ diff --git a/arch/sparc64/kernel/process.c b/arch/sparc64/kernel/process.c index 0f60547c24d9..fc8137a21ced 100644 --- a/arch/sparc64/kernel/process.c +++ b/arch/sparc64/kernel/process.c @@ -304,6 +304,19 @@ void show_regs(struct pt_regs *regs) struct global_reg_snapshot global_reg_snapshot[NR_CPUS]; static DEFINE_SPINLOCK(global_reg_snapshot_lock); +static bool kstack_valid(struct thread_info *tp, struct reg_window *rw) +{ + unsigned long thread_base, fp; + + thread_base = (unsigned long) tp; + fp = (unsigned long) rw; + + if (fp < (thread_base + sizeof(struct thread_info)) || + fp >= (thread_base + THREAD_SIZE)) + return false; + return true; +} + static void __global_reg_self(struct thread_info *tp, struct pt_regs *regs, int this_cpu) { @@ -315,14 +328,22 @@ static void __global_reg_self(struct thread_info *tp, struct pt_regs *regs, global_reg_snapshot[this_cpu].o7 = regs->u_regs[UREG_I7]; if (regs->tstate & TSTATE_PRIV) { + struct thread_info *tp = current_thread_info(); struct reg_window *rw; rw = (struct reg_window *) (regs->u_regs[UREG_FP] + STACK_BIAS); - global_reg_snapshot[this_cpu].i7 = rw->ins[7]; - } else + if (kstack_valid(tp, rw)) { + global_reg_snapshot[this_cpu].i7 = rw->ins[7]; + rw = (struct reg_window *) + (rw->ins[6] + STACK_BIAS); + if (kstack_valid(tp, rw)) + global_reg_snapshot[this_cpu].rpc = rw->ins[7]; + } + } else { global_reg_snapshot[this_cpu].i7 = 0; - + global_reg_snapshot[this_cpu].rpc = 0; + } global_reg_snapshot[this_cpu].thread = tp; } @@ -375,13 +396,14 @@ static void sysrq_handle_globreg(int key, struct tty_struct *tty) ((tp && tp->task) ? tp->task->pid : -1)); if (gp->tstate & TSTATE_PRIV) { - printk(" TPC[%pS] O7[%pS] I7[%pS]\n", + printk(" TPC[%pS] O7[%pS] I7[%pS] RPC[%pS]\n", (void *) gp->tpc, (void *) gp->o7, - (void *) gp->i7); + (void *) gp->i7, + (void *) gp->rpc); } else { - printk(" TPC[%lx] O7[%lx] I7[%lx]\n", - gp->tpc, gp->o7, gp->i7); + printk(" TPC[%lx] O7[%lx] I7[%lx] RPC[%lx]\n", + gp->tpc, gp->o7, gp->i7, gp->rpc); } } diff --git a/arch/sparc64/mm/ultra.S b/arch/sparc64/mm/ultra.S index 4c8ca131ffaf..77ba88597cc5 100644 --- a/arch/sparc64/mm/ultra.S +++ b/arch/sparc64/mm/ultra.S @@ -531,6 +531,13 @@ xcall_fetch_glob_regs: stx %g7, [%g1 + GR_SNAP_TNPC] stx %o7, [%g1 + GR_SNAP_O7] stx %i7, [%g1 + GR_SNAP_I7] + /* Don't try this at home kids... */ + rdpr %cwp, %g2 + sub %g2, 1, %g7 + wrpr %g7, %cwp + mov %i7, %g7 + wrpr %g2, %cwp + stx %g7, [%g1 + GR_SNAP_RPC] sethi %hi(trap_block), %g7 or %g7, %lo(trap_block), %g7 sllx %g2, TRAP_BLOCK_SZ_SHIFT, %g2 |