diff options
Diffstat (limited to 'gdb/spu-tdep.c')
| -rw-r--r-- | gdb/spu-tdep.c | 69 |
1 files changed, 32 insertions, 37 deletions
diff --git a/gdb/spu-tdep.c b/gdb/spu-tdep.c index 7e72275..a45532b 100644 --- a/gdb/spu-tdep.c +++ b/gdb/spu-tdep.c @@ -1079,52 +1079,47 @@ spu_breakpoint_from_pc (CORE_ADDR * pcptr, int *lenptr) /* Software single-stepping support. */ int -spu_software_single_step (enum target_signal signal, int insert_breakpoints_p) +spu_software_single_step (struct regcache *regcache) { - if (insert_breakpoints_p) - { - CORE_ADDR pc, next_pc; - unsigned int insn; - int offset, reg; - gdb_byte buf[4]; - - regcache_cooked_read (current_regcache, SPU_PC_REGNUM, buf); - /* Mask off interrupt enable bit. */ - pc = extract_unsigned_integer (buf, 4) & -4; + CORE_ADDR pc, next_pc; + unsigned int insn; + int offset, reg; + gdb_byte buf[4]; - if (target_read_memory (pc, buf, 4)) - return 1; - insn = extract_unsigned_integer (buf, 4); + regcache_cooked_read (regcache, SPU_PC_REGNUM, buf); + /* Mask off interrupt enable bit. */ + pc = extract_unsigned_integer (buf, 4) & -4; - /* Next sequential instruction is at PC + 4, except if the current - 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); - else - next_pc = (pc + 4) & (SPU_LS_SIZE - 1); + if (target_read_memory (pc, buf, 4)) + return 1; + insn = extract_unsigned_integer (buf, 4); - insert_single_step_breakpoint (next_pc); + /* Next sequential instruction is at PC + 4, except if the current + 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); + else + next_pc = (pc + 4) & (SPU_LS_SIZE - 1); - if (is_branch (insn, &offset, ®)) - { - CORE_ADDR target = offset; + insert_single_step_breakpoint (next_pc); - if (reg == SPU_PC_REGNUM) - target += pc; - else if (reg != -1) - { - regcache_cooked_read_part (current_regcache, reg, 0, 4, buf); - target += extract_unsigned_integer (buf, 4) & -4; - } + if (is_branch (insn, &offset, ®)) + { + CORE_ADDR target = offset; - target = target & (SPU_LS_SIZE - 1); - if (target != next_pc) - insert_single_step_breakpoint (target); + if (reg == SPU_PC_REGNUM) + target += pc; + else if (reg != -1) + { + regcache_cooked_read_part (regcache, reg, 0, 4, buf); + target += extract_unsigned_integer (buf, 4) & -4; } + + target = target & (SPU_LS_SIZE - 1); + if (target != next_pc) + insert_single_step_breakpoint (target); } - else - remove_single_step_breakpoints (); return 1; } |