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-rw-r--r--drivers/misc/kgdbts.c29
1 files changed, 11 insertions, 18 deletions
diff --git a/drivers/misc/kgdbts.c b/drivers/misc/kgdbts.c
index 74f16f167b8e..b0c56313dbbb 100644
--- a/drivers/misc/kgdbts.c
+++ b/drivers/misc/kgdbts.c
@@ -285,33 +285,26 @@ static void hw_break_val_write(void)
285static int check_and_rewind_pc(char *put_str, char *arg) 285static int check_and_rewind_pc(char *put_str, char *arg)
286{ 286{
287 unsigned long addr = lookup_addr(arg); 287 unsigned long addr = lookup_addr(arg);
288 unsigned long ip;
288 int offset = 0; 289 int offset = 0;
289 290
290 kgdb_hex2mem(&put_str[1], (char *)kgdbts_gdb_regs, 291 kgdb_hex2mem(&put_str[1], (char *)kgdbts_gdb_regs,
291 NUMREGBYTES); 292 NUMREGBYTES);
292 gdb_regs_to_pt_regs(kgdbts_gdb_regs, &kgdbts_regs); 293 gdb_regs_to_pt_regs(kgdbts_gdb_regs, &kgdbts_regs);
293 v2printk("Stopped at IP: %lx\n", instruction_pointer(&kgdbts_regs)); 294 ip = instruction_pointer(&kgdbts_regs);
294#ifdef CONFIG_X86 295 v2printk("Stopped at IP: %lx\n", ip);
295 /* On x86 a breakpoint stop requires it to be decremented */ 296#ifdef GDB_ADJUSTS_BREAK_OFFSET
296 if (addr + 1 == kgdbts_regs.ip) 297 /* On some arches, a breakpoint stop requires it to be decremented */
297 offset = -1; 298 if (addr + BREAK_INSTR_SIZE == ip)
298#elif defined(CONFIG_SUPERH) 299 offset = -BREAK_INSTR_SIZE;
299 /* On SUPERH a breakpoint stop requires it to be decremented */
300 if (addr + 2 == kgdbts_regs.pc)
301 offset = -2;
302#endif 300#endif
303 if (strcmp(arg, "silent") && 301 if (strcmp(arg, "silent") && ip + offset != addr) {
304 instruction_pointer(&kgdbts_regs) + offset != addr) {
305 eprintk("kgdbts: BP mismatch %lx expected %lx\n", 302 eprintk("kgdbts: BP mismatch %lx expected %lx\n",
306 instruction_pointer(&kgdbts_regs) + offset, addr); 303 ip + offset, addr);
307 return 1; 304 return 1;
308 } 305 }
309#ifdef CONFIG_X86 306 /* Readjust the instruction pointer if needed */
310 /* On x86 adjust the instruction pointer if needed */ 307 instruction_pointer_set(&kgdbts_regs, ip + offset);
311 kgdbts_regs.ip += offset;
312#elif defined(CONFIG_SUPERH)
313 kgdbts_regs.pc += offset;
314#endif
315 return 0; 308 return 0;
316} 309}
317 310