+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Copyright (C) 2003-2006, Axis Communications AB.
- */
-
-#include <linux/ptrace.h>
-#include <linux/extable.h>
-#include <linux/uaccess.h>
-#include <linux/sched/debug.h>
-
-#include <hwregs/supp_reg.h>
-#include <hwregs/intr_vect_defs.h>
-#include <asm/irq.h>
-
-void show_registers(struct pt_regs *regs)
-{
- /*
- * It's possible to use either the USP register or current->thread.usp.
- * USP might not correspond to the current process for all cases this
- * function is called, and current->thread.usp isn't up to date for the
- * current process. Experience shows that using USP is the way to go.
- */
- unsigned long usp = rdusp();
- unsigned long d_mmu_cause;
- unsigned long i_mmu_cause;
-
- printk("CPU: %d\n", smp_processor_id());
-
- printk("ERP: %08lx SRP: %08lx CCS: %08lx USP: %08lx MOF: %08lx\n",
- regs->erp, regs->srp, regs->ccs, usp, regs->mof);
-
- printk(" r0: %08lx r1: %08lx r2: %08lx r3: %08lx\n",
- regs->r0, regs->r1, regs->r2, regs->r3);
-
- printk(" r4: %08lx r5: %08lx r6: %08lx r7: %08lx\n",
- regs->r4, regs->r5, regs->r6, regs->r7);
-
- printk(" r8: %08lx r9: %08lx r10: %08lx r11: %08lx\n",
- regs->r8, regs->r9, regs->r10, regs->r11);
-
- printk("r12: %08lx r13: %08lx oR10: %08lx acr: %08lx\n",
- regs->r12, regs->r13, regs->orig_r10, regs->acr);
-
- printk(" sp: %08lx\n", (unsigned long)regs);
-
- SUPP_BANK_SEL(BANK_IM);
- SUPP_REG_RD(RW_MM_CAUSE, i_mmu_cause);
-
- SUPP_BANK_SEL(BANK_DM);
- SUPP_REG_RD(RW_MM_CAUSE, d_mmu_cause);
-
- printk(" Data MMU Cause: %08lx\n", d_mmu_cause);
- printk("Instruction MMU Cause: %08lx\n", i_mmu_cause);
-
- printk("Process %s (pid: %d, stackpage=%08lx)\n",
- current->comm, current->pid, (unsigned long)current);
-
- /*
- * When in-kernel, we also print out the stack and code at the
- * time of the fault..
- */
- if (!user_mode(regs)) {
- int i;
-
- show_stack(NULL, (unsigned long *)usp);
-
- /*
- * If the previous stack-dump wasn't a kernel one, dump the
- * kernel stack now.
- */
- if (usp != 0)
- show_stack(NULL, NULL);
-
- printk("\nCode: ");
-
- if (regs->erp < PAGE_OFFSET)
- goto bad_value;
-
- /*
- * Quite often the value at regs->erp doesn't point to the
- * interesting instruction, which often is the previous
- * instruction. So dump at an offset large enough that the
- * instruction decoding should be in sync at the interesting
- * point, but small enough to fit on a row. The regs->erp
- * location is pointed out in a ksymoops-friendly way by
- * wrapping the byte for that address in parenthesises.
- */
- for (i = -12; i < 12; i++) {
- unsigned char c;
-
- if (__get_user(c, &((unsigned char *)regs->erp)[i])) {
-bad_value:
- printk(" Bad IP value.");
- break;
- }
-
- if (i == 0)
- printk("(%02x) ", c);
- else
- printk("%02x ", c);
- }
- printk("\n");
- }
-}
-
-void arch_enable_nmi(void)
-{
- unsigned long flags;
-
- local_save_flags(flags);
- flags |= (1 << 30); /* NMI M flag is at bit 30 */
- local_irq_restore(flags);
-}
-
-extern void (*nmi_handler)(struct pt_regs *);
-void handle_nmi(struct pt_regs *regs)
-{
-#ifdef CONFIG_ETRAXFS
- reg_intr_vect_r_nmi r;
-#endif
-
- if (nmi_handler)
- nmi_handler(regs);
-
-#ifdef CONFIG_ETRAXFS
- /* Wait until nmi is no longer active. */
- do {
- r = REG_RD(intr_vect, regi_irq, r_nmi);
- } while (r.ext == regk_intr_vect_on);
-#endif
-}
-
-
-#ifdef CONFIG_BUG
-extern void die_if_kernel(const char *str, struct pt_regs *regs, long err);
-
-/* Copy of the regs at BUG() time. */
-struct pt_regs BUG_regs;
-
-void do_BUG(char *file, unsigned int line)
-{
- printk("kernel BUG at %s:%d!\n", file, line);
- die_if_kernel("Oops", &BUG_regs, 0);
-}
-EXPORT_SYMBOL(do_BUG);
-
-void fixup_BUG(struct pt_regs *regs)
-{
- BUG_regs = *regs;
-
-#ifdef CONFIG_DEBUG_BUGVERBOSE
- /*
- * Fixup the BUG arguments through exception handlers.
- */
- {
- const struct exception_table_entry *fixup;
-
- /*
- * ERP points at the "break 14" + 2, compensate for the 2
- * bytes.
- */
- fixup = search_exception_tables(instruction_pointer(regs) - 2);
- if (fixup) {
- /* Adjust the instruction pointer in the stackframe. */
- instruction_pointer(regs) = fixup->fixup;
- arch_fixup(regs);
- }
- }
-#else
- /* Dont try to lookup the filename + line, just dump regs. */
- do_BUG("unknown", 0);
-#endif
-}
-
-/*
- * Break 14 handler. Save regs and jump into the fixup_BUG.
- */
-__asm__ ( ".text\n\t"
- ".global breakh_BUG\n\t"
- "breakh_BUG:\n\t"
- SAVE_ALL
- KGDB_FIXUP
- "move.d $sp, $r10\n\t"
- "jsr fixup_BUG\n\t"
- "nop\n\t"
- "jump ret_from_intr\n\t"
- "nop\n\t");
-
-
-#ifdef CONFIG_DEBUG_BUGVERBOSE
-void
-handle_BUG(struct pt_regs *regs)
-{
-}
-#endif
-#endif
git.samba.org / sfrench / cifs-2.6.git / blobdiff