#include <asm/busctl-regs.h>
#include <unit/leds.h>
#include <asm/fpu.h>
-#include <asm/gdb-stub.h>
#include <asm/sections.h>
+#include <asm/debugger.h>
+#include "internal.h"
#if (CONFIG_INTERRUPT_VECTOR_BASE & 0xffffff)
#error "INTERRUPT_VECTOR_BASE not aligned to 16MiB boundary!"
spinlock_t die_lock = __SPIN_LOCK_UNLOCKED(die_lock);
-ATOMIC_NOTIFIER_HEAD(mn10300_die_chain);
+struct exception_to_signal_map {
+ u8 signo;
+ u32 si_code;
+};
+
+static const struct exception_to_signal_map exception_to_signal_map[256] = {
+ /* MMU exceptions */
+ [EXCEP_ITLBMISS >> 3] = { 0, 0 },
+ [EXCEP_DTLBMISS >> 3] = { 0, 0 },
+ [EXCEP_IAERROR >> 3] = { 0, 0 },
+ [EXCEP_DAERROR >> 3] = { 0, 0 },
+
+ /* system exceptions */
+ [EXCEP_TRAP >> 3] = { SIGTRAP, TRAP_BRKPT },
+ [EXCEP_ISTEP >> 3] = { SIGTRAP, TRAP_TRACE }, /* Monitor */
+ [EXCEP_IBREAK >> 3] = { SIGTRAP, TRAP_HWBKPT }, /* Monitor */
+ [EXCEP_OBREAK >> 3] = { SIGTRAP, TRAP_HWBKPT }, /* Monitor */
+ [EXCEP_PRIVINS >> 3] = { SIGILL, ILL_PRVOPC },
+ [EXCEP_UNIMPINS >> 3] = { SIGILL, ILL_ILLOPC },
+ [EXCEP_UNIMPEXINS >> 3] = { SIGILL, ILL_ILLOPC },
+ [EXCEP_MEMERR >> 3] = { SIGSEGV, SEGV_ACCERR },
+ [EXCEP_MISALIGN >> 3] = { SIGBUS, BUS_ADRALN },
+ [EXCEP_BUSERROR >> 3] = { SIGBUS, BUS_ADRERR },
+ [EXCEP_ILLINSACC >> 3] = { SIGSEGV, SEGV_ACCERR },
+ [EXCEP_ILLDATACC >> 3] = { SIGSEGV, SEGV_ACCERR },
+ [EXCEP_IOINSACC >> 3] = { SIGSEGV, SEGV_ACCERR },
+ [EXCEP_PRIVINSACC >> 3] = { SIGSEGV, SEGV_ACCERR }, /* userspace */
+ [EXCEP_PRIVDATACC >> 3] = { SIGSEGV, SEGV_ACCERR }, /* userspace */
+ [EXCEP_DATINSACC >> 3] = { SIGSEGV, SEGV_ACCERR },
+ [EXCEP_DOUBLE_FAULT >> 3] = { SIGILL, ILL_BADSTK },
+
+ /* FPU exceptions */
+ [EXCEP_FPU_DISABLED >> 3] = { SIGILL, ILL_COPROC },
+ [EXCEP_FPU_UNIMPINS >> 3] = { SIGILL, ILL_COPROC },
+ [EXCEP_FPU_OPERATION >> 3] = { SIGFPE, FPE_INTDIV },
+
+ /* interrupts */
+ [EXCEP_WDT >> 3] = { SIGALRM, 0 },
+ [EXCEP_NMI >> 3] = { SIGQUIT, 0 },
+ [EXCEP_IRQ_LEVEL0 >> 3] = { SIGINT, 0 },
+ [EXCEP_IRQ_LEVEL1 >> 3] = { 0, 0 },
+ [EXCEP_IRQ_LEVEL2 >> 3] = { 0, 0 },
+ [EXCEP_IRQ_LEVEL3 >> 3] = { 0, 0 },
+ [EXCEP_IRQ_LEVEL4 >> 3] = { 0, 0 },
+ [EXCEP_IRQ_LEVEL5 >> 3] = { 0, 0 },
+ [EXCEP_IRQ_LEVEL6 >> 3] = { 0, 0 },
+
+ /* system calls */
+ [EXCEP_SYSCALL0 >> 3] = { 0, 0 },
+ [EXCEP_SYSCALL1 >> 3] = { SIGILL, ILL_ILLTRP },
+ [EXCEP_SYSCALL2 >> 3] = { SIGILL, ILL_ILLTRP },
+ [EXCEP_SYSCALL3 >> 3] = { SIGILL, ILL_ILLTRP },
+ [EXCEP_SYSCALL4 >> 3] = { SIGILL, ILL_ILLTRP },
+ [EXCEP_SYSCALL5 >> 3] = { SIGILL, ILL_ILLTRP },
+ [EXCEP_SYSCALL6 >> 3] = { SIGILL, ILL_ILLTRP },
+ [EXCEP_SYSCALL7 >> 3] = { SIGILL, ILL_ILLTRP },
+ [EXCEP_SYSCALL8 >> 3] = { SIGILL, ILL_ILLTRP },
+ [EXCEP_SYSCALL9 >> 3] = { SIGILL, ILL_ILLTRP },
+ [EXCEP_SYSCALL10 >> 3] = { SIGILL, ILL_ILLTRP },
+ [EXCEP_SYSCALL11 >> 3] = { SIGILL, ILL_ILLTRP },
+ [EXCEP_SYSCALL12 >> 3] = { SIGILL, ILL_ILLTRP },
+ [EXCEP_SYSCALL13 >> 3] = { SIGILL, ILL_ILLTRP },
+ [EXCEP_SYSCALL14 >> 3] = { SIGILL, ILL_ILLTRP },
+ [EXCEP_SYSCALL15 >> 3] = { SIGABRT, 0 },
+};
/*
- * These constants are for searching for possible module text
- * segments. MODULE_RANGE is a guess of how much space is likely
- * to be vmalloced.
+ * Handle kernel exceptions.
+ *
+ * See if there's a fixup handler we can force a jump to when an exception
+ * happens due to something kernel code did
*/
-#define MODULE_RANGE (8 * 1024 * 1024)
-
-#define DO_ERROR(signr, prologue, str, name) \
-asmlinkage void name(struct pt_regs *regs, u32 intcode) \
-{ \
- prologue; \
- if (die_if_no_fixup(str, regs, intcode)) \
- return; \
- force_sig(signr, current); \
-}
+int die_if_no_fixup(const char *str, struct pt_regs *regs,
+ enum exception_code code)
+{
+ u8 opcode;
+ int signo, si_code;
+
+ if (user_mode(regs))
+ return 0;
+
+ peripheral_leds_display_exception(code);
+
+ signo = exception_to_signal_map[code >> 3].signo;
+ si_code = exception_to_signal_map[code >> 3].si_code;
+
+ switch (code) {
+ /* see if we can fixup the kernel accessing memory */
+ case EXCEP_ITLBMISS:
+ case EXCEP_DTLBMISS:
+ case EXCEP_IAERROR:
+ case EXCEP_DAERROR:
+ case EXCEP_MEMERR:
+ case EXCEP_MISALIGN:
+ case EXCEP_BUSERROR:
+ case EXCEP_ILLDATACC:
+ case EXCEP_IOINSACC:
+ case EXCEP_PRIVINSACC:
+ case EXCEP_PRIVDATACC:
+ case EXCEP_DATINSACC:
+ if (fixup_exception(regs))
+ return 1;
+ break;
-#define DO_EINFO(signr, prologue, str, name, sicode) \
-asmlinkage void name(struct pt_regs *regs, u32 intcode) \
-{ \
- siginfo_t info; \
- prologue; \
- if (die_if_no_fixup(str, regs, intcode)) \
- return; \
- info.si_signo = signr; \
- if (signr == SIGILL && sicode == ILL_ILLOPC) { \
- uint8_t opcode; \
- if (get_user(opcode, (uint8_t __user *)regs->pc) == 0) \
- if (opcode == 0xff) \
- info.si_signo = SIGTRAP; \
- } \
- info.si_errno = 0; \
- info.si_code = sicode; \
- info.si_addr = (void *) regs->pc; \
- force_sig_info(info.si_signo, &info, current); \
+ case EXCEP_TRAP:
+ case EXCEP_UNIMPINS:
+ if (get_user(opcode, (uint8_t __user *)regs->pc) != 0)
+ break;
+ if (opcode == 0xff) {
+ if (notify_die(DIE_BREAKPOINT, str, regs, code, 0, 0))
+ return 1;
+ if (at_debugger_breakpoint(regs))
+ regs->pc++;
+ signo = SIGTRAP;
+ si_code = TRAP_BRKPT;
+ }
+ break;
+
+ case EXCEP_SYSCALL1 ... EXCEP_SYSCALL14:
+ /* syscall return addr is _after_ the instruction */
+ regs->pc -= 2;
+ break;
+
+ case EXCEP_SYSCALL15:
+ if (report_bug(regs->pc, regs) == BUG_TRAP_TYPE_WARN)
+ return 1;
+
+ /* syscall return addr is _after_ the instruction */
+ regs->pc -= 2;
+ break;
+
+ default:
+ break;
+ }
+
+ if (debugger_intercept(code, signo, si_code, regs) == 0)
+ return 1;
+
+ if (notify_die(DIE_GPF, str, regs, code, 0, 0))
+ return 1;
+
+ /* make the process die as the last resort */
+ die(str, regs, code);
}
-DO_ERROR(SIGTRAP, {}, "trap", trap);
-DO_ERROR(SIGSEGV, {}, "ibreak", ibreak);
-DO_ERROR(SIGSEGV, {}, "obreak", obreak);
-DO_EINFO(SIGSEGV, {}, "access error", access_error, SEGV_ACCERR);
-DO_EINFO(SIGSEGV, {}, "insn access error", insn_acc_error, SEGV_ACCERR);
-DO_EINFO(SIGSEGV, {}, "data access error", data_acc_error, SEGV_ACCERR);
-DO_EINFO(SIGILL, {}, "privileged opcode", priv_op, ILL_PRVOPC);
-DO_EINFO(SIGILL, {}, "invalid opcode", invalid_op, ILL_ILLOPC);
-DO_EINFO(SIGILL, {}, "invalid ex opcode", invalid_exop, ILL_ILLOPC);
-DO_EINFO(SIGBUS, {}, "invalid address", mem_error, BUS_ADRERR);
-DO_EINFO(SIGBUS, {}, "bus error", bus_error, BUS_ADRERR);
-
-DO_ERROR(SIGTRAP,
-#ifndef CONFIG_MN10300_USING_JTAG
- DCR &= ~0x0001,
-#else
- {},
-#endif
- "single step", istep);
+/*
+ * General exception handler
+ */
+asmlinkage void handle_exception(struct pt_regs *regs, u32 intcode)
+{
+ siginfo_t info;
+
+ /* deal with kernel exceptions here */
+ if (die_if_no_fixup(NULL, regs, intcode))
+ return;
+
+ /* otherwise it's a userspace exception */
+ info.si_signo = exception_to_signal_map[intcode >> 3].signo;
+ info.si_code = exception_to_signal_map[intcode >> 3].si_code;
+ info.si_errno = 0;
+ info.si_addr = (void *) regs->pc;
+ force_sig_info(info.si_signo, &info, current);
+}
/*
* handle NMI
asmlinkage void nmi(struct pt_regs *regs, enum exception_code code)
{
/* see if gdbstub wants to deal with it */
-#ifdef CONFIG_GDBSTUB
- if (gdbstub_intercept(regs, code))
+ if (debugger_intercept(code, SIGQUIT, 0, regs))
return;
-#endif
printk(KERN_WARNING "--- Register Dump ---\n");
show_registers(regs);
*/
void show_trace(unsigned long *sp)
{
- unsigned long *stack, addr, module_start, module_end;
- int i;
-
- printk(KERN_EMERG "\nCall Trace:");
-
- stack = sp;
- i = 0;
- module_start = VMALLOC_START;
- module_end = VMALLOC_END;
+ unsigned long bottom, stack, addr, fp, raslot;
+
+ printk(KERN_EMERG "\nCall Trace:\n");
+
+ //stack = (unsigned long)sp;
+ asm("mov sp,%0" : "=a"(stack));
+ asm("mov a3,%0" : "=r"(fp));
+
+ raslot = ULONG_MAX;
+ bottom = (stack + THREAD_SIZE) & ~(THREAD_SIZE - 1);
+ for (; stack < bottom; stack += sizeof(addr)) {
+ addr = *(unsigned long *)stack;
+ if (stack == fp) {
+ if (addr > stack && addr < bottom) {
+ fp = addr;
+ raslot = stack + sizeof(addr);
+ continue;
+ }
+ fp = 0;
+ raslot = ULONG_MAX;
+ }
- while (((long) stack & (THREAD_SIZE - 1)) != 0) {
- addr = *stack++;
if (__kernel_text_address(addr)) {
-#if 1
printk(" [<%08lx>]", addr);
+ if (stack >= raslot)
+ raslot = ULONG_MAX;
+ else
+ printk(" ?");
print_symbol(" %s", addr);
printk("\n");
-#else
- if ((i % 6) == 0)
- printk(KERN_EMERG " ");
- printk("[<%08lx>] ", addr);
- i++;
-#endif
}
}
}
/*
- * see if there's a fixup handler we can force a jump to when an exception
- * happens due to something kernel code did
- */
-int die_if_no_fixup(const char *str, struct pt_regs *regs,
- enum exception_code code)
-{
- if (user_mode(regs))
- return 0;
-
- peripheral_leds_display_exception(code);
-
- switch (code) {
- /* see if we can fixup the kernel accessing memory */
- case EXCEP_ITLBMISS:
- case EXCEP_DTLBMISS:
- case EXCEP_IAERROR:
- case EXCEP_DAERROR:
- case EXCEP_MEMERR:
- case EXCEP_MISALIGN:
- case EXCEP_BUSERROR:
- case EXCEP_ILLDATACC:
- case EXCEP_IOINSACC:
- case EXCEP_PRIVINSACC:
- case EXCEP_PRIVDATACC:
- case EXCEP_DATINSACC:
- if (fixup_exception(regs))
- return 1;
- case EXCEP_UNIMPINS:
- if (regs->pc && *(uint8_t *)regs->pc == 0xff)
- if (notify_die(DIE_BREAKPOINT, str, regs, code, 0, 0))
- return 1;
- break;
- default:
- break;
- }
-
- /* see if gdbstub wants to deal with it */
-#ifdef CONFIG_GDBSTUB
- if (gdbstub_intercept(regs, code))
- return 1;
-#endif
-
- if (notify_die(DIE_GPF, str, regs, code, 0, 0))
- return 1;
-
- /* make the process die as the last resort */
- die(str, regs, code);
-}
-
-/*
- * handle unsupported syscall instructions (syscall 1-15)
- */
-static asmlinkage void unsupported_syscall(struct pt_regs *regs,
- enum exception_code code)
-{
- struct task_struct *tsk = current;
- siginfo_t info;
-
- /* catch a kernel BUG() */
- if (code == EXCEP_SYSCALL15 && !user_mode(regs)) {
- if (report_bug(regs->pc, regs) == BUG_TRAP_TYPE_BUG) {
-#ifdef CONFIG_GDBSTUB
- gdbstub_intercept(regs, code);
-#endif
- }
- }
-
- regs->pc -= 2; /* syscall return addr is _after_ the instruction */
-
- die_if_no_fixup("An unsupported syscall insn was used by the kernel\n",
- regs, code);
-
- info.si_signo = SIGILL;
- info.si_errno = ENOSYS;
- info.si_code = ILL_ILLTRP;
- info.si_addr = (void *) regs->pc;
- force_sig_info(SIGILL, &info, tsk);
-}
-
-/*
* display the register file when the stack pointer gets clobbered
*/
asmlinkage void do_double_fault(struct pt_regs *regs)
{
/* see if gdbstub wants to deal with it */
-#ifdef CONFIG_GDBSTUB
- if (gdbstub_intercept(regs, code))
+ if (debugger_intercept(code, SIGSYS, 0, regs) == 0)
return;
-#endif
peripheral_leds_display_exception(code);
printk(KERN_EMERG "Uninitialised Exception 0x%04x\n", code & 0xFFFF);
*/
void __init trap_init(void)
{
- set_excp_vector(EXCEP_TRAP, trap);
- set_excp_vector(EXCEP_ISTEP, istep);
- set_excp_vector(EXCEP_IBREAK, ibreak);
- set_excp_vector(EXCEP_OBREAK, obreak);
-
- set_excp_vector(EXCEP_PRIVINS, priv_op);
- set_excp_vector(EXCEP_UNIMPINS, invalid_op);
- set_excp_vector(EXCEP_UNIMPEXINS, invalid_exop);
- set_excp_vector(EXCEP_MEMERR, mem_error);
+ set_excp_vector(EXCEP_TRAP, handle_exception);
+ set_excp_vector(EXCEP_ISTEP, handle_exception);
+ set_excp_vector(EXCEP_IBREAK, handle_exception);
+ set_excp_vector(EXCEP_OBREAK, handle_exception);
+
+ set_excp_vector(EXCEP_PRIVINS, handle_exception);
+ set_excp_vector(EXCEP_UNIMPINS, handle_exception);
+ set_excp_vector(EXCEP_UNIMPEXINS, handle_exception);
+ set_excp_vector(EXCEP_MEMERR, handle_exception);
set_excp_vector(EXCEP_MISALIGN, misalignment);
- set_excp_vector(EXCEP_BUSERROR, bus_error);
- set_excp_vector(EXCEP_ILLINSACC, insn_acc_error);
- set_excp_vector(EXCEP_ILLDATACC, data_acc_error);
- set_excp_vector(EXCEP_IOINSACC, insn_acc_error);
- set_excp_vector(EXCEP_PRIVINSACC, insn_acc_error);
- set_excp_vector(EXCEP_PRIVDATACC, data_acc_error);
- set_excp_vector(EXCEP_DATINSACC, insn_acc_error);
- set_excp_vector(EXCEP_FPU_UNIMPINS, fpu_invalid_op);
+ set_excp_vector(EXCEP_BUSERROR, handle_exception);
+ set_excp_vector(EXCEP_ILLINSACC, handle_exception);
+ set_excp_vector(EXCEP_ILLDATACC, handle_exception);
+ set_excp_vector(EXCEP_IOINSACC, handle_exception);
+ set_excp_vector(EXCEP_PRIVINSACC, handle_exception);
+ set_excp_vector(EXCEP_PRIVDATACC, handle_exception);
+ set_excp_vector(EXCEP_DATINSACC, handle_exception);
+ set_excp_vector(EXCEP_FPU_UNIMPINS, handle_exception);
set_excp_vector(EXCEP_FPU_OPERATION, fpu_exception);
set_excp_vector(EXCEP_NMI, nmi);
- set_excp_vector(EXCEP_SYSCALL1, unsupported_syscall);
- set_excp_vector(EXCEP_SYSCALL2, unsupported_syscall);
- set_excp_vector(EXCEP_SYSCALL3, unsupported_syscall);
- set_excp_vector(EXCEP_SYSCALL4, unsupported_syscall);
- set_excp_vector(EXCEP_SYSCALL5, unsupported_syscall);
- set_excp_vector(EXCEP_SYSCALL6, unsupported_syscall);
- set_excp_vector(EXCEP_SYSCALL7, unsupported_syscall);
- set_excp_vector(EXCEP_SYSCALL8, unsupported_syscall);
- set_excp_vector(EXCEP_SYSCALL9, unsupported_syscall);
- set_excp_vector(EXCEP_SYSCALL10, unsupported_syscall);
- set_excp_vector(EXCEP_SYSCALL11, unsupported_syscall);
- set_excp_vector(EXCEP_SYSCALL12, unsupported_syscall);
- set_excp_vector(EXCEP_SYSCALL13, unsupported_syscall);
- set_excp_vector(EXCEP_SYSCALL14, unsupported_syscall);
- set_excp_vector(EXCEP_SYSCALL15, unsupported_syscall);
+ set_excp_vector(EXCEP_SYSCALL1, handle_exception);
+ set_excp_vector(EXCEP_SYSCALL2, handle_exception);
+ set_excp_vector(EXCEP_SYSCALL3, handle_exception);
+ set_excp_vector(EXCEP_SYSCALL4, handle_exception);
+ set_excp_vector(EXCEP_SYSCALL5, handle_exception);
+ set_excp_vector(EXCEP_SYSCALL6, handle_exception);
+ set_excp_vector(EXCEP_SYSCALL7, handle_exception);
+ set_excp_vector(EXCEP_SYSCALL8, handle_exception);
+ set_excp_vector(EXCEP_SYSCALL9, handle_exception);
+ set_excp_vector(EXCEP_SYSCALL10, handle_exception);
+ set_excp_vector(EXCEP_SYSCALL11, handle_exception);
+ set_excp_vector(EXCEP_SYSCALL12, handle_exception);
+ set_excp_vector(EXCEP_SYSCALL13, handle_exception);
+ set_excp_vector(EXCEP_SYSCALL14, handle_exception);
+ set_excp_vector(EXCEP_SYSCALL15, handle_exception);
}
/*
projects / platform / kernel / linux-stable.git / commitdiff