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author | David S. Miller <davem@davemloft.net> | 2008-08-12 18:33:56 -0700 |
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committer | David S. Miller <davem@davemloft.net> | 2008-08-12 18:33:56 -0700 |
commit | 4f70f7a91bffdcc39f088748dc678953eb9a3fbd (patch) | |
tree | 934591a9518fbed87c14b758a1744cc30c9dfbb8 /arch/sparc64/kernel/process.c | |
parent | e34456825de0d3ac4c4e8fe0bdc6b599404ea06f (diff) | |
download | op-kernel-dev-4f70f7a91bffdcc39f088748dc678953eb9a3fbd.zip op-kernel-dev-4f70f7a91bffdcc39f088748dc678953eb9a3fbd.tar.gz |
sparc64: Implement IRQ stacks.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc64/kernel/process.c')
-rw-r--r-- | arch/sparc64/kernel/process.c | 27 |
1 files changed, 7 insertions, 20 deletions
diff --git a/arch/sparc64/kernel/process.c b/arch/sparc64/kernel/process.c index 7f5debd..15f4178 100644 --- a/arch/sparc64/kernel/process.c +++ b/arch/sparc64/kernel/process.c @@ -52,6 +52,8 @@ #include <asm/irq_regs.h> #include <asm/smp.h> +#include "kstack.h" + static void sparc64_yield(int cpu) { if (tlb_type != hypervisor) @@ -235,19 +237,6 @@ 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) { @@ -264,11 +253,11 @@ static void __global_reg_self(struct thread_info *tp, struct pt_regs *regs, rw = (struct reg_window *) (regs->u_regs[UREG_FP] + STACK_BIAS); - if (kstack_valid(tp, rw)) { + if (kstack_valid(tp, (unsigned long) rw)) { global_reg_snapshot[this_cpu].i7 = rw->ins[7]; rw = (struct reg_window *) (rw->ins[6] + STACK_BIAS); - if (kstack_valid(tp, rw)) + if (kstack_valid(tp, (unsigned long) rw)) global_reg_snapshot[this_cpu].rpc = rw->ins[7]; } } else { @@ -828,7 +817,7 @@ out: unsigned long get_wchan(struct task_struct *task) { unsigned long pc, fp, bias = 0; - unsigned long thread_info_base; + struct thread_info *tp; struct reg_window *rw; unsigned long ret = 0; int count = 0; @@ -837,14 +826,12 @@ unsigned long get_wchan(struct task_struct *task) task->state == TASK_RUNNING) goto out; - thread_info_base = (unsigned long) task_stack_page(task); + tp = task_thread_info(task); bias = STACK_BIAS; fp = task_thread_info(task)->ksp + bias; do { - /* Bogus frame pointer? */ - if (fp < (thread_info_base + sizeof(struct thread_info)) || - fp >= (thread_info_base + THREAD_SIZE)) + if (!kstack_valid(tp, fp)) break; rw = (struct reg_window *) fp; pc = rw->ins[7]; |