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authorJiong Wang <jiwang@sourceware.org>2013-03-01 10:45:28 +0000
committerJiong Wang <jiwang@sourceware.org>2013-03-01 10:45:28 +0000
commit61d8bd0e1700c0697faee44ea34b9601a6600569 (patch)
tree01eeeed0406c1f7d8ddd2e081b1a029a2df2e688 /gdb
parentc32f23033e497f3f10f8e8e0943341978bbb9a9a (diff)
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Implement get_longjmp_target for tilegx.
gdb/ * tilegx-tdep.c (tilegx_get_longjmp_target): New function. (tilegx_gdbarch_init): Install it.
Diffstat (limited to 'gdb')
-rw-r--r--gdb/ChangeLog5
-rw-r--r--gdb/tilegx-tdep.c24
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);