diff options
Diffstat (limited to 'gdb/spu-tdep.c')
| -rw-r--r-- | gdb/spu-tdep.c | 33 |
1 files changed, 27 insertions, 6 deletions
diff --git a/gdb/spu-tdep.c b/gdb/spu-tdep.c index f749ece..e06fc7d 100644 --- a/gdb/spu-tdep.c +++ b/gdb/spu-tdep.c @@ -726,7 +726,9 @@ static const struct frame_base spu_frame_base = { static CORE_ADDR spu_unwind_pc (struct gdbarch *gdbarch, struct frame_info *next_frame) { - return frame_unwind_register_unsigned (next_frame, SPU_PC_REGNUM); + CORE_ADDR pc = frame_unwind_register_unsigned (next_frame, SPU_PC_REGNUM); + /* Mask off interrupt enable bit. */ + return pc & -4; } static CORE_ADDR @@ -735,6 +737,22 @@ spu_unwind_sp (struct gdbarch *gdbarch, struct frame_info *next_frame) return frame_unwind_register_unsigned (next_frame, SPU_SP_REGNUM); } +static CORE_ADDR +spu_read_pc (ptid_t ptid) +{ + CORE_ADDR pc = read_register_pid (SPU_PC_REGNUM, ptid); + /* Mask off interrupt enable bit. */ + return pc & -4; +} + +static void +spu_write_pc (CORE_ADDR pc, ptid_t ptid) +{ + /* Keep interrupt enabled state unchanged. */ + CORE_ADDR old_pc = read_register_pid (SPU_PC_REGNUM, ptid); + write_register_pid (SPU_PC_REGNUM, (pc & -4) | (old_pc & 3), ptid); +} + /* Function calling convention. */ @@ -970,7 +988,8 @@ spu_software_single_step (enum target_signal signal, int insert_breakpoints_p) gdb_byte buf[4]; regcache_cooked_read (current_regcache, SPU_PC_REGNUM, buf); - pc = extract_unsigned_integer (buf, 4); + /* Mask off interrupt enable bit. */ + pc = extract_unsigned_integer (buf, 4) & -4; if (target_read_memory (pc, buf, 4)) return; @@ -980,9 +999,9 @@ spu_software_single_step (enum target_signal signal, int insert_breakpoints_p) instruction is a PPE-assisted call, in which case it is at PC + 8. Wrap around LS limit to be on the safe side. */ if ((insn & 0xffffff00) == 0x00002100) - next_pc = (pc + 8) & (SPU_LS_SIZE - 1) & -4; + next_pc = (pc + 8) & (SPU_LS_SIZE - 1); else - next_pc = (pc + 4) & (SPU_LS_SIZE - 1) & -4; + next_pc = (pc + 4) & (SPU_LS_SIZE - 1); insert_single_step_breakpoint (next_pc); @@ -995,10 +1014,10 @@ spu_software_single_step (enum target_signal signal, int insert_breakpoints_p) else if (reg != -1) { regcache_cooked_read_part (current_regcache, reg, 0, 4, buf); - target += extract_unsigned_integer (buf, 4); + target += extract_unsigned_integer (buf, 4) & -4; } - target = target & (SPU_LS_SIZE - 1) & -4; + target = target & (SPU_LS_SIZE - 1); if (target != next_pc) insert_single_step_breakpoint (target); } @@ -1035,6 +1054,8 @@ spu_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) set_gdbarch_num_pseudo_regs (gdbarch, SPU_NUM_PSEUDO_REGS); set_gdbarch_sp_regnum (gdbarch, SPU_SP_REGNUM); set_gdbarch_pc_regnum (gdbarch, SPU_PC_REGNUM); + set_gdbarch_read_pc (gdbarch, spu_read_pc); + set_gdbarch_write_pc (gdbarch, spu_write_pc); set_gdbarch_register_name (gdbarch, spu_register_name); set_gdbarch_register_type (gdbarch, spu_register_type); set_gdbarch_pseudo_register_read (gdbarch, spu_pseudo_register_read); |