powerpc: make process.c suitable for both 32-bit and 64-bit
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Paul Mackerras
Родитель
daec962e27
Коммит
06d67d5474
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@ -0,0 +1,36 @@
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#include <linux/mm.h>
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#include <linux/module.h>
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#include <linux/sched.h>
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#include <linux/init.h>
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#include <linux/init_task.h>
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#include <linux/fs.h>
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#include <linux/mqueue.h>
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#include <asm/uaccess.h>
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static struct fs_struct init_fs = INIT_FS;
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static struct files_struct init_files = INIT_FILES;
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static struct signal_struct init_signals = INIT_SIGNALS(init_signals);
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static struct sighand_struct init_sighand = INIT_SIGHAND(init_sighand);
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struct mm_struct init_mm = INIT_MM(init_mm);
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EXPORT_SYMBOL(init_mm);
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/*
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* Initial thread structure.
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*
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* We need to make sure that this is 16384-byte aligned due to the
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* way process stacks are handled. This is done by having a special
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* "init_task" linker map entry..
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*/
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union thread_union init_thread_union
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__attribute__((__section__(".data.init_task"))) =
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{ INIT_THREAD_INFO(init_task) };
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/*
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* Initial task structure.
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*
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* All other task structs will be allocated on slabs in fork.c
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*/
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struct task_struct init_task = INIT_TASK(init_task);
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EXPORT_SYMBOL(init_task);
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@ -36,6 +36,8 @@
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#include <linux/kallsyms.h>
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#include <linux/mqueue.h>
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#include <linux/hardirq.h>
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#include <linux/utsname.h>
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#include <linux/kprobes.h>
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#include <asm/pgtable.h>
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#include <asm/uaccess.h>
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@ -44,6 +46,11 @@
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#include <asm/processor.h>
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#include <asm/mmu.h>
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#include <asm/prom.h>
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#ifdef CONFIG_PPC64
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#include <asm/firmware.h>
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#include <asm/plpar_wrappers.h>
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#include <asm/time.h>
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#endif
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extern unsigned long _get_SP(void);
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@ -53,26 +60,6 @@ struct task_struct *last_task_used_altivec = NULL;
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struct task_struct *last_task_used_spe = NULL;
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#endif
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static struct fs_struct init_fs = INIT_FS;
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static struct files_struct init_files = INIT_FILES;
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static struct signal_struct init_signals = INIT_SIGNALS(init_signals);
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static struct sighand_struct init_sighand = INIT_SIGHAND(init_sighand);
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struct mm_struct init_mm = INIT_MM(init_mm);
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EXPORT_SYMBOL(init_mm);
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/* this is 8kB-aligned so we can get to the thread_info struct
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at the base of it from the stack pointer with 1 integer instruction. */
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union thread_union init_thread_union
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__attribute__((__section__(".data.init_task"))) =
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{ INIT_THREAD_INFO(init_task) };
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/* initial task structure */
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struct task_struct init_task = INIT_TASK(init_task);
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EXPORT_SYMBOL(init_task);
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/* only used to get secondary processor up */
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struct task_struct *current_set[NR_CPUS] = {&init_task, };
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/*
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* Make sure the floating-point register state in the
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* the thread_struct is up to date for task tsk.
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@ -237,7 +224,10 @@ int set_dabr(unsigned long dabr)
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return ret;
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}
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#ifdef CONFIG_PPC64
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DEFINE_PER_CPU(struct cpu_usage, cpu_usage_array);
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static DEFINE_PER_CPU(unsigned long, current_dabr);
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#endif
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struct task_struct *__switch_to(struct task_struct *prev,
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struct task_struct *new)
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@ -308,10 +298,27 @@ struct task_struct *__switch_to(struct task_struct *prev,
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set_dabr(new->thread.dabr);
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__get_cpu_var(current_dabr) = new->thread.dabr;
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}
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flush_tlb_pending();
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#endif
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new_thread = &new->thread;
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old_thread = ¤t->thread;
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#ifdef CONFIG_PPC64
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/*
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* Collect processor utilization data per process
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*/
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if (firmware_has_feature(FW_FEATURE_SPLPAR)) {
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struct cpu_usage *cu = &__get_cpu_var(cpu_usage_array);
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long unsigned start_tb, current_tb;
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start_tb = old_thread->start_tb;
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cu->current_tb = current_tb = mfspr(SPRN_PURR);
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old_thread->accum_tb += (current_tb - start_tb);
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new_thread->start_tb = current_tb;
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}
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#endif
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local_irq_save(flags);
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last = _switch(old_thread, new_thread);
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@ -320,37 +327,106 @@ struct task_struct *__switch_to(struct task_struct *prev,
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return last;
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}
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static int instructions_to_print = 16;
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#ifdef CONFIG_PPC64
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#define BAD_PC(pc) ((REGION_ID(pc) != KERNEL_REGION_ID) && \
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(REGION_ID(pc) != VMALLOC_REGION_ID))
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#else
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#define BAD_PC(pc) ((pc) < KERNELBASE)
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#endif
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static void show_instructions(struct pt_regs *regs)
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{
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int i;
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unsigned long pc = regs->nip - (instructions_to_print * 3 / 4 *
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sizeof(int));
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printk("Instruction dump:");
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for (i = 0; i < instructions_to_print; i++) {
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int instr;
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if (!(i % 8))
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printk("\n");
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if (BAD_PC(pc) || __get_user(instr, (unsigned int *)pc)) {
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printk("XXXXXXXX ");
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} else {
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if (regs->nip == pc)
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printk("<%08x> ", instr);
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else
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printk("%08x ", instr);
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}
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pc += sizeof(int);
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}
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printk("\n");
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}
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static struct regbit {
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unsigned long bit;
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const char *name;
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} msr_bits[] = {
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{MSR_EE, "EE"},
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{MSR_PR, "PR"},
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{MSR_FP, "FP"},
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{MSR_ME, "ME"},
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{MSR_IR, "IR"},
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{MSR_DR, "DR"},
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{0, NULL}
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};
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static void printbits(unsigned long val, struct regbit *bits)
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{
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const char *sep = "";
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printk("<");
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for (; bits->bit; ++bits)
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if (val & bits->bit) {
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printk("%s%s", sep, bits->name);
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sep = ",";
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}
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printk(">");
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}
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#ifdef CONFIG_PPC64
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#define REG "%016lX"
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#define REGS_PER_LINE 4
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#define LAST_VOLATILE 13
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#else
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#define REG "%08lX"
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#define REGS_PER_LINE 8
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#define LAST_VOLATILE 12
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#endif
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void show_regs(struct pt_regs * regs)
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{
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int i, trap;
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printk("NIP: %08lX LR: %08lX SP: %08lX REGS: %p TRAP: %04lx %s\n",
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regs->nip, regs->link, regs->gpr[1], regs, regs->trap,
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print_tainted());
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printk("MSR: %08lx EE: %01x PR: %01x FP: %01x ME: %01x IR/DR: %01x%01x\n",
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regs->msr, regs->msr&MSR_EE ? 1 : 0, regs->msr&MSR_PR ? 1 : 0,
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regs->msr & MSR_FP ? 1 : 0,regs->msr&MSR_ME ? 1 : 0,
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regs->msr&MSR_IR ? 1 : 0,
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regs->msr&MSR_DR ? 1 : 0);
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printk("NIP: "REG" LR: "REG" CTR: "REG"\n",
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regs->nip, regs->link, regs->ctr);
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printk("REGS: %p TRAP: %04lx %s (%s)\n",
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regs, regs->trap, print_tainted(), system_utsname.release);
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printk("MSR: "REG" ", regs->msr);
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printbits(regs->msr, msr_bits);
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printk(" CR: %08lX XER: %08lX\n", regs->ccr, regs->xer);
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trap = TRAP(regs);
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if (trap == 0x300 || trap == 0x600)
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printk("DAR: %08lX, DSISR: %08lX\n", regs->dar, regs->dsisr);
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printk("TASK = %p[%d] '%s' THREAD: %p\n",
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printk("DAR: "REG", DSISR: "REG"\n", regs->dar, regs->dsisr);
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printk("TASK = %p[%d] '%s' THREAD: %p",
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current, current->pid, current->comm, current->thread_info);
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printk("Last syscall: %ld ", current->thread.last_syscall);
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#ifdef CONFIG_SMP
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printk(" CPU: %d", smp_processor_id());
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#endif /* CONFIG_SMP */
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for (i = 0; i < 32; i++) {
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long r;
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if ((i % 8) == 0)
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if ((i % REGS_PER_LINE) == 0)
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printk("\n" KERN_INFO "GPR%02d: ", i);
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if (__get_user(r, ®s->gpr[i]))
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break;
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printk("%08lX ", r);
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if (i == 12 && !FULL_REGS(regs))
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printk(REG " ", regs->gpr[i]);
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if (i == LAST_VOLATILE && !FULL_REGS(regs))
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break;
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}
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printk("\n");
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@ -359,16 +435,20 @@ void show_regs(struct pt_regs * regs)
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* Lookup NIP late so we have the best change of getting the
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* above info out without failing
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*/
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printk("NIP [%08lx] ", regs->nip);
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printk("NIP ["REG"] ", regs->nip);
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print_symbol("%s\n", regs->nip);
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printk("LR [%08lx] ", regs->link);
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printk("LR ["REG"] ", regs->link);
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print_symbol("%s\n", regs->link);
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#endif
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show_stack(current, (unsigned long *) regs->gpr[1]);
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if (!user_mode(regs))
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show_instructions(regs);
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}
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void exit_thread(void)
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{
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kprobe_flush_task(current);
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#ifndef CONFIG_SMP
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if (last_task_used_math == current)
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last_task_used_math = NULL;
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@ -385,6 +465,14 @@ void exit_thread(void)
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void flush_thread(void)
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{
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#ifdef CONFIG_PPC64
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struct thread_info *t = current_thread_info();
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if (t->flags & _TIF_ABI_PENDING)
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t->flags ^= (_TIF_ABI_PENDING | _TIF_32BIT);
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#endif
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kprobe_flush_task(current);
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#ifndef CONFIG_SMP
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if (last_task_used_math == current)
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last_task_used_math = NULL;
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@ -425,15 +513,13 @@ void prepare_to_copy(struct task_struct *tsk)
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/*
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* Copy a thread..
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*/
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int
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copy_thread(int nr, unsigned long clone_flags, unsigned long usp,
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unsigned long unused,
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struct task_struct *p, struct pt_regs *regs)
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int copy_thread(int nr, unsigned long clone_flags, unsigned long usp,
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unsigned long unused, struct task_struct *p,
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struct pt_regs *regs)
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{
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struct pt_regs *childregs, *kregs;
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extern void ret_from_fork(void);
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unsigned long sp = (unsigned long)p->thread_info + THREAD_SIZE;
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unsigned long childframe;
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CHECK_FULL_REGS(regs);
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/* Copy registers */
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@ -443,17 +529,26 @@ copy_thread(int nr, unsigned long clone_flags, unsigned long usp,
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if ((childregs->msr & MSR_PR) == 0) {
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/* for kernel thread, set `current' and stackptr in new task */
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childregs->gpr[1] = sp + sizeof(struct pt_regs);
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#ifdef CONFIG_PPC32
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childregs->gpr[2] = (unsigned long) p;
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#else
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clear_ti_thread_flag(p->thread_info, TIF_32BIT);
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#endif
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p->thread.regs = NULL; /* no user register state */
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} else {
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childregs->gpr[1] = usp;
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p->thread.regs = childregs;
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if (clone_flags & CLONE_SETTLS)
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childregs->gpr[2] = childregs->gpr[6];
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if (clone_flags & CLONE_SETTLS) {
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#ifdef CONFIG_PPC64
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if (!test_thread_flag(TIF_32BIT))
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childregs->gpr[13] = childregs->gpr[6];
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else
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#endif
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childregs->gpr[2] = childregs->gpr[6];
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}
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}
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childregs->gpr[3] = 0; /* Result from fork() */
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sp -= STACK_FRAME_OVERHEAD;
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childframe = sp;
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/*
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* The way this works is that at some point in the future
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@ -467,9 +562,30 @@ copy_thread(int nr, unsigned long clone_flags, unsigned long usp,
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kregs = (struct pt_regs *) sp;
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sp -= STACK_FRAME_OVERHEAD;
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p->thread.ksp = sp;
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kregs->nip = (unsigned long)ret_from_fork;
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#ifdef CONFIG_PPC64
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if (cpu_has_feature(CPU_FTR_SLB)) {
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unsigned long sp_vsid = get_kernel_vsid(sp);
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sp_vsid <<= SLB_VSID_SHIFT;
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sp_vsid |= SLB_VSID_KERNEL;
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if (cpu_has_feature(CPU_FTR_16M_PAGE))
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sp_vsid |= SLB_VSID_L;
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p->thread.ksp_vsid = sp_vsid;
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}
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/*
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* The PPC64 ABI makes use of a TOC to contain function
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* pointers. The function (ret_from_except) is actually a pointer
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* to the TOC entry. The first entry is a pointer to the actual
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* function.
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*/
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kregs->nip = *((unsigned long *)ret_from_fork);
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#else
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kregs->nip = (unsigned long)ret_from_fork;
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p->thread.last_syscall = -1;
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#endif
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return 0;
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}
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@ -477,18 +593,61 @@ copy_thread(int nr, unsigned long clone_flags, unsigned long usp,
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/*
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* Set up a thread for executing a new program
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*/
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void start_thread(struct pt_regs *regs, unsigned long nip, unsigned long sp)
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void start_thread(struct pt_regs *regs, unsigned long start, unsigned long sp)
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{
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set_fs(USER_DS);
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/*
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* If we exec out of a kernel thread then thread.regs will not be
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* set. Do it now.
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*/
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if (!current->thread.regs) {
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unsigned long childregs = (unsigned long)current->thread_info +
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THREAD_SIZE;
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childregs -= sizeof(struct pt_regs);
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current->thread.regs = (struct pt_regs *)childregs;
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}
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memset(regs->gpr, 0, sizeof(regs->gpr));
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regs->ctr = 0;
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regs->link = 0;
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regs->xer = 0;
|
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regs->ccr = 0;
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regs->mq = 0;
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regs->nip = nip;
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regs->gpr[1] = sp;
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#ifdef CONFIG_PPC32
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regs->mq = 0;
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regs->nip = start;
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regs->msr = MSR_USER;
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#else
|
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if (test_thread_flag(TIF_32BIT)) {
|
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unsigned long entry, toc, load_addr = regs->gpr[2];
|
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|
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/* start is a relocated pointer to the function descriptor for
|
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* the elf _start routine. The first entry in the function
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* descriptor is the entry address of _start and the second
|
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* entry is the TOC value we need to use.
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*/
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__get_user(entry, (unsigned long __user *)start);
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__get_user(toc, (unsigned long __user *)start+1);
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|
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/* Check whether the e_entry function descriptor entries
|
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* need to be relocated before we can use them.
|
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*/
|
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if (load_addr != 0) {
|
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entry += load_addr;
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toc += load_addr;
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}
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regs->nip = entry;
|
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regs->gpr[2] = toc;
|
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regs->msr = MSR_USER64;
|
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} else {
|
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regs->nip = start;
|
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regs->gpr[2] = 0;
|
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regs->msr = MSR_USER32;
|
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}
|
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#endif
|
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|
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#ifndef CONFIG_SMP
|
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if (last_task_used_math == current)
|
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last_task_used_math = NULL;
|
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|
|
@ -506,6 +665,7 @@ void start_thread(struct pt_regs *regs, unsigned long nip, unsigned long sp)
|
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#ifdef CONFIG_ALTIVEC
|
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memset(current->thread.vr, 0, sizeof(current->thread.vr));
|
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memset(¤t->thread.vscr, 0, sizeof(current->thread.vscr));
|
||||
current->thread.vscr.u[3] = 0x00010000; /* Java mode disabled */
|
||||
current->thread.vrsave = 0;
|
||||
current->thread.used_vr = 0;
|
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#endif /* CONFIG_ALTIVEC */
|
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|
|
@ -532,22 +692,23 @@ int set_fpexc_mode(struct task_struct *tsk, unsigned int val)
|
|||
#ifdef CONFIG_SPE
|
||||
tsk->thread.fpexc_mode = val &
|
||||
(PR_FP_EXC_SW_ENABLE | PR_FP_ALL_EXCEPT);
|
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return 0;
|
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#else
|
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return -EINVAL;
|
||||
#endif
|
||||
} else {
|
||||
/* on a CONFIG_SPE this does not hurt us. The bits that
|
||||
* __pack_fe01 use do not overlap with bits used for
|
||||
* PR_FP_EXC_SW_ENABLE. Additionally, the MSR[FE0,FE1] bits
|
||||
* on CONFIG_SPE implementations are reserved so writing to
|
||||
* them does not change anything */
|
||||
if (val > PR_FP_EXC_PRECISE)
|
||||
return -EINVAL;
|
||||
tsk->thread.fpexc_mode = __pack_fe01(val);
|
||||
if (regs != NULL && (regs->msr & MSR_FP) != 0)
|
||||
regs->msr = (regs->msr & ~(MSR_FE0|MSR_FE1))
|
||||
| tsk->thread.fpexc_mode;
|
||||
}
|
||||
|
||||
/* on a CONFIG_SPE this does not hurt us. The bits that
|
||||
* __pack_fe01 use do not overlap with bits used for
|
||||
* PR_FP_EXC_SW_ENABLE. Additionally, the MSR[FE0,FE1] bits
|
||||
* on CONFIG_SPE implementations are reserved so writing to
|
||||
* them does not change anything */
|
||||
if (val > PR_FP_EXC_PRECISE)
|
||||
return -EINVAL;
|
||||
tsk->thread.fpexc_mode = __pack_fe01(val);
|
||||
if (regs != NULL && (regs->msr & MSR_FP) != 0)
|
||||
regs->msr = (regs->msr & ~(MSR_FE0|MSR_FE1))
|
||||
| tsk->thread.fpexc_mode;
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
|
@ -566,6 +727,8 @@ int get_fpexc_mode(struct task_struct *tsk, unsigned long adr)
|
|||
return put_user(val, (unsigned int __user *) adr);
|
||||
}
|
||||
|
||||
#define TRUNC_PTR(x) ((typeof(x))(((unsigned long)(x)) & 0xffffffff))
|
||||
|
||||
int sys_clone(unsigned long clone_flags, unsigned long usp,
|
||||
int __user *parent_tidp, void __user *child_threadptr,
|
||||
int __user *child_tidp, int p6,
|
||||
|
|
@ -574,6 +737,12 @@ int sys_clone(unsigned long clone_flags, unsigned long usp,
|
|||
CHECK_FULL_REGS(regs);
|
||||
if (usp == 0)
|
||||
usp = regs->gpr[1]; /* stack pointer for child */
|
||||
#ifdef CONFIG_PPC64
|
||||
if (test_thread_flag(TIF_32BIT)) {
|
||||
parent_tidp = TRUNC_PTR(parent_tidp);
|
||||
child_tidp = TRUNC_PTR(child_tidp);
|
||||
}
|
||||
#endif
|
||||
return do_fork(clone_flags, usp, regs, 0, parent_tidp, child_tidp);
|
||||
}
|
||||
|
||||
|
|
@ -599,7 +768,7 @@ int sys_execve(unsigned long a0, unsigned long a1, unsigned long a2,
|
|||
struct pt_regs *regs)
|
||||
{
|
||||
int error;
|
||||
char * filename;
|
||||
char *filename;
|
||||
|
||||
filename = getname((char __user *) a0);
|
||||
error = PTR_ERR(filename);
|
||||
|
|
@ -644,20 +813,53 @@ static int validate_sp(unsigned long sp, struct task_struct *p,
|
|||
return 0;
|
||||
}
|
||||
|
||||
void dump_stack(void)
|
||||
{
|
||||
show_stack(current, NULL);
|
||||
}
|
||||
#ifdef CONFIG_PPC64
|
||||
#define MIN_STACK_FRAME 112 /* same as STACK_FRAME_OVERHEAD, in fact */
|
||||
#define FRAME_LR_SAVE 2
|
||||
#define INT_FRAME_SIZE (sizeof(struct pt_regs) + STACK_FRAME_OVERHEAD + 288)
|
||||
#define REGS_MARKER 0x7265677368657265ul
|
||||
#define FRAME_MARKER 12
|
||||
#else
|
||||
#define MIN_STACK_FRAME 16
|
||||
#define FRAME_LR_SAVE 1
|
||||
#define INT_FRAME_SIZE (sizeof(struct pt_regs) + STACK_FRAME_OVERHEAD)
|
||||
#define REGS_MARKER 0x72656773ul
|
||||
#define FRAME_MARKER 2
|
||||
#endif
|
||||
|
||||
EXPORT_SYMBOL(dump_stack);
|
||||
unsigned long get_wchan(struct task_struct *p)
|
||||
{
|
||||
unsigned long ip, sp;
|
||||
int count = 0;
|
||||
|
||||
if (!p || p == current || p->state == TASK_RUNNING)
|
||||
return 0;
|
||||
|
||||
sp = p->thread.ksp;
|
||||
if (!validate_sp(sp, p, MIN_STACK_FRAME))
|
||||
return 0;
|
||||
|
||||
do {
|
||||
sp = *(unsigned long *)sp;
|
||||
if (!validate_sp(sp, p, MIN_STACK_FRAME))
|
||||
return 0;
|
||||
if (count > 0) {
|
||||
ip = ((unsigned long *)sp)[FRAME_LR_SAVE];
|
||||
if (!in_sched_functions(ip))
|
||||
return ip;
|
||||
}
|
||||
} while (count++ < 16);
|
||||
return 0;
|
||||
}
|
||||
EXPORT_SYMBOL(get_wchan);
|
||||
|
||||
static int kstack_depth_to_print = 64;
|
||||
|
||||
void show_stack(struct task_struct *tsk, unsigned long *stack)
|
||||
{
|
||||
unsigned long sp, stack_top, prev_sp, ret;
|
||||
unsigned long sp, ip, lr, newsp;
|
||||
int count = 0;
|
||||
unsigned long next_exc = 0;
|
||||
struct pt_regs *regs;
|
||||
extern char ret_from_except, ret_from_except_full, ret_from_syscall;
|
||||
int firstframe = 1;
|
||||
|
||||
sp = (unsigned long) stack;
|
||||
if (tsk == NULL)
|
||||
|
|
@ -669,65 +871,45 @@ void show_stack(struct task_struct *tsk, unsigned long *stack)
|
|||
sp = tsk->thread.ksp;
|
||||
}
|
||||
|
||||
prev_sp = (unsigned long) (tsk->thread_info + 1);
|
||||
stack_top = (unsigned long) tsk->thread_info + THREAD_SIZE;
|
||||
while (count < 16 && sp > prev_sp && sp < stack_top && (sp & 3) == 0) {
|
||||
if (count == 0) {
|
||||
printk("Call trace:");
|
||||
#ifdef CONFIG_KALLSYMS
|
||||
printk("\n");
|
||||
#endif
|
||||
} else {
|
||||
if (next_exc) {
|
||||
ret = next_exc;
|
||||
next_exc = 0;
|
||||
} else
|
||||
ret = *(unsigned long *)(sp + 4);
|
||||
printk(" [%08lx] ", ret);
|
||||
#ifdef CONFIG_KALLSYMS
|
||||
print_symbol("%s", ret);
|
||||
printk("\n");
|
||||
#endif
|
||||
if (ret == (unsigned long) &ret_from_except
|
||||
|| ret == (unsigned long) &ret_from_except_full
|
||||
|| ret == (unsigned long) &ret_from_syscall) {
|
||||
/* sp + 16 points to an exception frame */
|
||||
regs = (struct pt_regs *) (sp + 16);
|
||||
if (sp + 16 + sizeof(*regs) <= stack_top)
|
||||
next_exc = regs->nip;
|
||||
}
|
||||
}
|
||||
++count;
|
||||
sp = *(unsigned long *)sp;
|
||||
}
|
||||
#ifndef CONFIG_KALLSYMS
|
||||
if (count > 0)
|
||||
printk("\n");
|
||||
#endif
|
||||
}
|
||||
|
||||
unsigned long get_wchan(struct task_struct *p)
|
||||
{
|
||||
unsigned long ip, sp;
|
||||
int count = 0;
|
||||
|
||||
if (!p || p == current || p->state == TASK_RUNNING)
|
||||
return 0;
|
||||
|
||||
sp = p->thread.ksp;
|
||||
if (!validate_sp(sp, p, 16))
|
||||
return 0;
|
||||
|
||||
lr = 0;
|
||||
printk("Call Trace:\n");
|
||||
do {
|
||||
sp = *(unsigned long *)sp;
|
||||
if (!validate_sp(sp, p, 16))
|
||||
return 0;
|
||||
if (count > 0) {
|
||||
ip = *(unsigned long *)(sp + 4);
|
||||
if (!in_sched_functions(ip))
|
||||
return ip;
|
||||
if (!validate_sp(sp, tsk, MIN_STACK_FRAME))
|
||||
return;
|
||||
|
||||
stack = (unsigned long *) sp;
|
||||
newsp = stack[0];
|
||||
ip = stack[FRAME_LR_SAVE];
|
||||
if (!firstframe || ip != lr) {
|
||||
printk("["REG"] ["REG"] ", sp, ip);
|
||||
print_symbol("%s", ip);
|
||||
if (firstframe)
|
||||
printk(" (unreliable)");
|
||||
printk("\n");
|
||||
}
|
||||
} while (count++ < 16);
|
||||
return 0;
|
||||
firstframe = 0;
|
||||
|
||||
/*
|
||||
* See if this is an exception frame.
|
||||
* We look for the "regshere" marker in the current frame.
|
||||
*/
|
||||
if (validate_sp(sp, tsk, INT_FRAME_SIZE)
|
||||
&& stack[FRAME_MARKER] == REGS_MARKER) {
|
||||
struct pt_regs *regs = (struct pt_regs *)
|
||||
(sp + STACK_FRAME_OVERHEAD);
|
||||
printk("--- Exception: %lx", regs->trap);
|
||||
print_symbol(" at %s\n", regs->nip);
|
||||
lr = regs->link;
|
||||
print_symbol(" LR = %s\n", lr);
|
||||
firstframe = 1;
|
||||
}
|
||||
|
||||
sp = newsp;
|
||||
} while (count++ < kstack_depth_to_print);
|
||||
}
|
||||
EXPORT_SYMBOL(get_wchan);
|
||||
|
||||
void dump_stack(void)
|
||||
{
|
||||
show_stack(current, NULL);
|
||||
}
|
||||
EXPORT_SYMBOL(dump_stack);
|
||||
|
|
|
|||
|
|
@ -214,10 +214,8 @@ extern int dump_task_fpu(struct task_struct *, elf_fpregset_t *);
|
|||
but it's not easy, and we've already done it here. */
|
||||
# define ELF_HWCAP (cur_cpu_spec->cpu_user_features)
|
||||
#ifdef __powerpc64__
|
||||
# define ELF_PLAT_INIT(_r, load_addr) do { \
|
||||
memset(_r->gpr, 0, sizeof(_r->gpr)); \
|
||||
_r->ctr = _r->link = _r->xer = _r->ccr = 0; \
|
||||
_r->gpr[2] = load_addr; \
|
||||
# define ELF_PLAT_INIT(_r, load_addr) do { \
|
||||
_r->gpr[2] = load_addr; \
|
||||
} while (0)
|
||||
#endif /* __powerpc64__ */
|
||||
|
||||
|
|
|
|||
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