diff options
| author | Sven Schnelle <svens@stackframe.org> | 2019-04-04 21:14:10 +0200 |
|---|---|---|
| committer | Helge Deller <deller@gmx.de> | 2019-05-03 23:47:38 +0200 |
| commit | eacbfce19d8b6dbd7958cbe01d65a21324cc2fad (patch) | |
| tree | 7c0da6ed84b5ff839e7ca019c45ee2bc28a4ec7f /arch/parisc/kernel/traps.c | |
| parent | 620a53d522ba007a79fffc444bd75e8d3775f5b8 (diff) | |
parisc: add KGDB support
This patch add KGDB support to PA-RISC. It also implements
single-stepping utilizing the recovery counter.
Signed-off-by: Sven Schnelle <svens@stackframe.org>
Signed-off-by: Helge Deller <deller@gmx.de>
Diffstat (limited to 'arch/parisc/kernel/traps.c')
| -rw-r--r-- | arch/parisc/kernel/traps.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/arch/parisc/kernel/traps.c b/arch/parisc/kernel/traps.c index 7e1ccafadf57..4a0516524f2a 100644 --- a/arch/parisc/kernel/traps.c +++ b/arch/parisc/kernel/traps.c @@ -42,6 +42,7 @@ #include <asm/unwind.h> #include <asm/tlbflush.h> #include <asm/cacheflush.h> +#include <linux/kgdb.h> #include "../math-emu/math-emu.h" /* for handle_fpe() */ @@ -293,6 +294,14 @@ static void handle_break(struct pt_regs *regs) (tt == BUG_TRAP_TYPE_NONE) ? 9 : 0); } +#ifdef CONFIG_KGDB + if (unlikely(iir == PARISC_KGDB_COMPILED_BREAK_INSN || + iir == PARISC_KGDB_BREAK_INSN)) { + kgdb_handle_exception(9, SIGTRAP, 0, regs); + return; + } +#endif + if (unlikely(iir != GDB_BREAK_INSN)) parisc_printk_ratelimited(0, regs, KERN_DEBUG "break %d,%d: pid=%d command='%s'\n", @@ -518,6 +527,14 @@ void notrace handle_interruption(int code, struct pt_regs *regs) case 3: /* Recovery counter trap */ regs->gr[0] &= ~PSW_R; + +#ifdef CONFIG_KGDB + if (kgdb_single_step) { + kgdb_handle_exception(0, SIGTRAP, 0, regs); + return; + } +#endif + if (user_space(regs)) handle_gdb_break(regs, TRAP_TRACE); /* else this must be the start of a syscall - just let it run */ |