diff options
Diffstat (limited to 'arch/sparc/kernel/process.c')
| -rw-r--r-- | arch/sparc/kernel/process.c | 46 |
1 files changed, 39 insertions, 7 deletions
diff --git a/arch/sparc/kernel/process.c b/arch/sparc/kernel/process.c index 96c57e963..1adc9e817 100644 --- a/arch/sparc/kernel/process.c +++ b/arch/sparc/kernel/process.c @@ -1,4 +1,4 @@ -/* $Id: process.c,v 1.93 1997/04/11 08:55:40 davem Exp $ +/* $Id: process.c,v 1.98 1997/05/14 20:44:54 davem Exp $ * linux/arch/sparc/kernel/process.c * * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu) @@ -41,6 +41,8 @@ extern void fpsave(unsigned long *, unsigned long *, void *, unsigned long *); +struct task_struct *current_set[NR_CPUS] = {&init_task, }; + #ifndef __SMP__ #define SUN4C_FAULT_HIGH 100 @@ -192,6 +194,37 @@ void show_regwindow(struct reg_window *rw) rw->ins[4], rw->ins[5], rw->ins[6], rw->ins[7]); } +static spinlock_t sparc_backtrace_lock = SPIN_LOCK_UNLOCKED; + +void show_backtrace(void) +{ + struct reg_window *rw; + unsigned long flags; + unsigned long fp; + int cpu = smp_processor_id(); + + spin_lock_irqsave(&sparc_backtrace_lock, flags); + __asm__ __volatile__("mov %%i6, %0" : "=r" (fp)); + rw = (struct reg_window *) fp; + while(rw) { + printk("CPU[%d]: ARGS[%08lx,%08lx,%08lx,%08lx,%08lx,%08lx] " + "FP[%08lx] CALLER[%08lx]\n", cpu, + rw->ins[0], rw->ins[1], rw->ins[2], rw->ins[3], + rw->ins[4], rw->ins[5], + rw->ins[6], + rw->ins[7]); + rw = (struct reg_window *) rw->ins[6]; + } + spin_unlock_irqrestore(&sparc_backtrace_lock, flags); +} + +#ifdef __SMP__ +void smp_show_backtrace_all_cpus(void) +{ + xc0((smpfunc_t) show_backtrace); +} +#endif + void show_stackframe(struct sparc_stackf *sf) { unsigned long size; @@ -441,12 +474,12 @@ int copy_thread(int nr, unsigned long clone_flags, unsigned long sp, if(regs->psr & PSR_PS) stack_offset -= REGWIN_SZ; - childregs = ((struct pt_regs *) (p->kernel_stack_page + stack_offset)); + childregs = ((struct pt_regs *) (((unsigned long)p) + stack_offset)); copy_regs(childregs, regs); new_stack = (((struct reg_window *) childregs) - 1); copy_regwin(new_stack, (((struct reg_window *) regs) - 1)); - p->tss.ksp = p->saved_kernel_stack = (unsigned long) new_stack; + p->tss.ksp = (unsigned long) new_stack; #ifdef __SMP__ p->tss.kpc = (((unsigned long) ret_from_smpfork) - 0x8); p->tss.kpsr = current->tss.fork_kpsr | PSR_PIL; @@ -467,7 +500,7 @@ int copy_thread(int nr, unsigned long clone_flags, unsigned long sp, p->tss.flags &= ~SPARC_FLAG_KTHREAD; p->tss.current_ds = USER_DS; - if (sp != current->tss.kregs->u_regs[UREG_FP]) { + if (sp != regs->u_regs[UREG_FP]) { struct sparc_stackf *childstack; struct sparc_stackf *parentstack; @@ -475,9 +508,8 @@ int copy_thread(int nr, unsigned long clone_flags, unsigned long sp, * This is a clone() call with supplied user stack. * Set some valid stack frames to give to the child. */ - childstack = (struct sparc_stackf *)sp; - parentstack = (struct sparc_stackf *) - current->tss.kregs->u_regs[UREG_FP]; + childstack = (struct sparc_stackf *) sp; + parentstack = (struct sparc_stackf *) regs->u_regs[UREG_FP]; #if 0 printk("clone: parent stack:\n"); |