Blackfin arch: fix 2 bugs related to debug

 - unable to single step over emuexcpt instruction
 - gdbproxy goes into infinite loop when doing gdb does "next" over
   "emuexcpt"

Don't decrement PC after software breakpoint.

Signed-off-by: Jie Zhang <jie.zhang@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>

diff --git a/arch/blackfin/mach-common/entry.S b/arch/blackfin/mach-common/entry.S
index fae7746..88de053 100644 (file)
--- a/arch/blackfin/mach-common/entry.S
+++ b/arch/blackfin/mach-common/entry.S
@@ -151,13 +151,6 @@ ENTRY(_ex_syscall)
        jump.s _bfin_return_from_exception;
 ENDPROC(_ex_syscall)
 
-ENTRY(_ex_soft_bp)
-       r7 = retx;
-       r7 += -2;
-       retx = r7;
-       jump.s _ex_trap_c;
-ENDPROC(_ex_soft_bp)
-
 ENTRY(_ex_single_step)
        /* If we just returned from an interrupt, the single step event is
           for the RTI instruction.  */
@@ -1087,7 +1080,7 @@ ENTRY(_ex_table)
         * EXCPT instruction can provide 4 bits of EXCAUSE, allowing 16 to be user defined
         */
        .long _ex_syscall       /* 0x00 - User Defined - Linux Syscall */
-       .long _ex_soft_bp       /* 0x01 - User Defined - Software breakpoint */
+       .long _ex_trap_c        /* 0x01 - User Defined - Software breakpoint */
 #ifdef CONFIG_KGDB
        .long _ex_trap_c        /* 0x02 - User Defined - KGDB initial connection
                                                         and break signal trap */