diff options
| -rw-r--r-- | gdb/ChangeLog | 5 | ||||
| -rw-r--r-- | gdb/tilegx-tdep.c | 24 |
2 files changed, 29 insertions, 0 deletions
diff --git a/gdb/ChangeLog b/gdb/ChangeLog index c788b3b..16c0a81 100644 --- a/gdb/ChangeLog +++ b/gdb/ChangeLog @@ -1,3 +1,8 @@ +2013-02-27 Jiong Wang <jiwang@tilera.com> + + * tilegx-tdep.c (tilegx_get_longjmp_target): New function. + (tilegx_gdbarch_init): Install it. + 2013-02-28 Tom Tromey <tromey@redhat.com> * python/py-arch.c (archpy_disassemble): Use PyInt_Check and diff --git a/gdb/tilegx-tdep.c b/gdb/tilegx-tdep.c index 2c4e349..f45c20f 100644 --- a/gdb/tilegx-tdep.c +++ b/gdb/tilegx-tdep.c @@ -785,6 +785,29 @@ tilegx_in_function_epilogue_p (struct gdbarch *gdbarch, CORE_ADDR pc) return 0; } +/* This is the implementation of gdbarch method get_longjmp_target. */ + +static int +tilegx_get_longjmp_target (struct frame_info *frame, CORE_ADDR *pc) +{ + struct gdbarch *gdbarch = get_frame_arch (frame); + enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); + CORE_ADDR jb_addr; + gdb_byte buf[8]; + + jb_addr = get_frame_register_unsigned (frame, TILEGX_R0_REGNUM); + + /* TileGX jmp_buf contains 32 elements of type __uint_reg_t which + has a size of 8 bytes. The return address is stored in the 25th + slot. */ + if (target_read_memory (jb_addr + 25 * 8, buf, 8)) + return 0; + + *pc = extract_unsigned_integer (buf, 8, byte_order); + + return 1; +} + /* by assigning the 'faultnum' reg in kernel pt_regs with this value, kernel do_signal will not check r0. see tilegx kernel/signal.c for details. */ @@ -1030,6 +1053,7 @@ tilegx_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) /* These values and methods are used when gdb calls a target function. */ set_gdbarch_push_dummy_call (gdbarch, tilegx_push_dummy_call); + set_gdbarch_get_longjmp_target (gdbarch, tilegx_get_longjmp_target); set_gdbarch_write_pc (gdbarch, tilegx_write_pc); set_gdbarch_breakpoint_from_pc (gdbarch, tilegx_breakpoint_from_pc); set_gdbarch_return_value (gdbarch, tilegx_return_value); |