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Viewing changes to arch/mips/kernel/traps.c

  • Committer: Bazaar Package Importer
  • Author(s): Paolo Pisati
  • Date: 2011-06-29 15:23:51 UTC
  • mfrom: (26.1.1 natty-proposed)
  • Revision ID: james.westby@ubuntu.com-20110629152351-xs96tm303d95rpbk
Tags: 3.0.0-1200.2
* Rebased against 3.0.0-6.7
* BSP from TI based on 3.0.0

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arch/mips/kernel/traps.c
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#include <linux/kdb.h>
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#include <linux/irq.h>
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#include <linux/perf_event.h>
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#include <trace/trap.h>
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#include <asm/bootinfo.h>
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#include <asm/branch.h>
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#include <asm/stacktrace.h>
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#include <asm/uasm.h>
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/*
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 * Also used in unaligned.c and fault.c.
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 */
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DEFINE_TRACE(trap_entry);
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DEFINE_TRACE(trap_exit);
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extern void check_wait(void);
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extern asmlinkage void r4k_wait(void);
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extern asmlinkage void rollback_handle_int(void);
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        printk("Cause : %08x\n", cause);
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        cause = CAUSE_EXCCODE(cause);
 
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        cause = (cause & CAUSEF_EXCCODE) >> CAUSEB_EXCCODE;
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        if (1 <= cause && cause <= 5)
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                printk("BadVA : %0*lx\n", field, regs->cp0_badvaddr);
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        unsigned long dvpret = dvpe();
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#endif /* CONFIG_MIPS_MT_SMTC */
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        notify_die(DIE_OOPS, str, regs, 0, regs_to_trapnr(regs), SIGSEGV);
 
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        if (notify_die(DIE_OOPS, str, regs, 0, regs_to_trapnr(regs), SIGSEGV) == NOTIFY_STOP)
 
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                sig = 0;
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        console_verbose();
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        spin_lock_irq(&die_lock);
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        mips_mt_regdump(dvpret);
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#endif /* CONFIG_MIPS_MT_SMTC */
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        if (notify_die(DIE_OOPS, str, regs, 0, regs_to_trapnr(regs), SIGSEGV) == NOTIFY_STOP)
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                sig = 0;
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        printk("%s[#%d]:\n", str, ++die_counter);
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        show_registers(regs);
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        add_taint(TAINT_DIE);
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                return;
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        die_if_kernel("FP exception in kernel code", regs);
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        trace_trap_entry(regs, CAUSE_EXCCODE(regs->cp0_cause));
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        if (fcr31 & FPU_CSR_UNI_X) {
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                int sig;
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                void __user *fault_addr = NULL;
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                /* If something went wrong, signal */
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                process_fpemu_return(sig, fault_addr);
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                trace_trap_exit();
 
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                return;
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        } else if (fcr31 & FPU_CSR_INV_X)
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                info.si_code = FPE_FLTINV;
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        info.si_errno = 0;
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        info.si_addr = (void __user *) regs->cp0_epc;
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        force_sig_info(SIGFPE, &info, current);
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        trace_trap_exit();
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}
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static void do_trap_or_bp(struct pt_regs *regs, unsigned int code,
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        int status;
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        unsigned long __maybe_unused flags;
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        trace_trap_entry(regs, CAUSE_EXCCODE(regs->cp0_cause));
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        die_if_kernel("do_cpu invoked from kernel context!", regs);
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        cpid = (regs->cp0_cause >> CAUSEB_CE) & 3;
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                opcode = 0;
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                status = -1;
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                if (unlikely(compute_return_epc(regs) < 0)) {
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                        trace_trap_exit();
 
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                if (unlikely(compute_return_epc(regs) < 0))
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                        return;
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                }
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                if (unlikely(get_user(opcode, epc) < 0))
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                        status = SIGSEGV;
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                        regs->cp0_epc = old_epc;        /* Undo skip-over.  */
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                        force_sig(status, current);
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                }
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                trace_trap_exit();
 
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                return;
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        case 1:
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                        if (!process_fpemu_return(sig, fault_addr))
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                                mt_ase_fp_affinity();
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                }
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                trace_trap_exit();
 
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                return;
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        case 2:
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                raw_notifier_call_chain(&cu2_chain, CU2_EXCEPTION, regs);
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                trace_trap_exit();
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                return;
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        case 3:
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        }
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        force_sig(SIGILL, current);
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        trace_trap_exit();
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}
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asmlinkage void do_mdmx(struct pt_regs *regs)