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| author | Paul Mundt <lethal@linux-sh.org> | 2007-11-20 10:08:06 +0100 |
|---|---|---|
| committer | Paul Mundt <lethal@linux-sh.org> | 2008-01-28 05:18:50 +0100 |
| commit | 5a4f7c66be981c6b5f44a4d66a14ea6ac9b7b6b0 (patch) | |
| tree | a605424a32ce11d189a1aa1385c3fc22f972449f /arch/sh/kernel/traps.c | |
| parent | sh: Move in the SH-5 TLB miss. (diff) | |
| download | linux-5a4f7c66be981c6b5f44a4d66a14ea6ac9b7b6b0.tar.xz linux-5a4f7c66be981c6b5f44a4d66a14ea6ac9b7b6b0.zip | |
sh: Share bug/debug traps across _32 and _64.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/sh/kernel/traps.c')
| -rw-r--r-- | arch/sh/kernel/traps.c | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/arch/sh/kernel/traps.c b/arch/sh/kernel/traps.c new file mode 100644 index 000000000000..bf70827b17cc --- /dev/null +++ b/arch/sh/kernel/traps.c @@ -0,0 +1,66 @@ +#include <linux/bug.h> +#include <linux/io.h> +#include <linux/types.h> +#include <linux/kdebug.h> +#include <asm/system.h> + +#ifdef CONFIG_BUG +static void handle_BUG(struct pt_regs *regs) +{ + enum bug_trap_type tt; + tt = report_bug(regs->pc, regs); + if (tt == BUG_TRAP_TYPE_WARN) { + regs->pc += instruction_size(regs->pc); + return; + } + + die("Kernel BUG", regs, TRAPA_BUG_OPCODE & 0xff); +} + +int is_valid_bugaddr(unsigned long addr) +{ + return addr >= PAGE_OFFSET; +} +#endif + +/* + * Generic trap handler. + */ +BUILD_TRAP_HANDLER(debug) +{ + TRAP_HANDLER_DECL; + + /* Rewind */ + regs->pc -= instruction_size(ctrl_inw(regs->pc - 4)); + + if (notify_die(DIE_TRAP, "debug trap", regs, 0, vec & 0xff, + SIGTRAP) == NOTIFY_STOP) + return; + + force_sig(SIGTRAP, current); +} + +/* + * Special handler for BUG() traps. + */ +BUILD_TRAP_HANDLER(bug) +{ + TRAP_HANDLER_DECL; + + /* Rewind */ + regs->pc -= instruction_size(ctrl_inw(regs->pc - 4)); + + if (notify_die(DIE_TRAP, "bug trap", regs, 0, TRAPA_BUG_OPCODE & 0xff, + SIGTRAP) == NOTIFY_STOP) + return; + +#ifdef CONFIG_BUG + if (__kernel_text_address(instruction_pointer(regs))) { + opcode_t insn = *(opcode_t *)instruction_pointer(regs); + if (insn == TRAPA_BUG_OPCODE) + handle_BUG(regs); + } +#endif + + force_sig(SIGTRAP, current); +} |