This is the mail archive of the
gdb-patches@sourceware.org
mailing list for the GDB project.
[PATCH 3/3] Segment support for x86_64, part 1
- From: Richard Henderson <rth at redhat dot com>
- To: gdb-patches at gcc dot gnu dot org
- Date: Tue, 3 Nov 2015 14:43:10 +0100
- Subject: [PATCH 3/3] Segment support for x86_64, part 1
- Authentication-results: sourceware.org; auth=none
- References: <1446558190-13482-1-git-send-email-rth at redhat dot com>
* amd64-tdep.c (amd64_address_class_type_flags): New.
(amd64_address_class_type_flags_to_name): New.
(amd64_address_class_name_to_type_flags): New.
(amd64_init_abi): Register them.
---
gdb/amd64-tdep.c | 56 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 56 insertions(+)
diff --git a/gdb/amd64-tdep.c b/gdb/amd64-tdep.c
index 6867a06..3f12796 100644
--- a/gdb/amd64-tdep.c
+++ b/gdb/amd64-tdep.c
@@ -2890,7 +2890,55 @@ const struct regset amd64_fpregset =
NULL, amd64_supply_fpregset, amd64_collect_fpregset
};
+/* Address classes. */
+static int
+amd64_address_class_type_flags (int byte_size, int dwarf2_addr_class)
+{
+ switch (dwarf2_addr_class)
+ {
+ case 1: /* __seg_fs */
+ return TYPE_INSTANCE_FLAG_ADDRESS_CLASS_1;
+ case 2: /* __seg_gs */
+ return TYPE_INSTANCE_FLAG_ADDRESS_CLASS_2;
+ default:
+ return 0;
+ }
+}
+
+static const char *
+amd64_address_class_type_flags_to_name (struct gdbarch *gdbarch, int type_flags)
+{
+ if (type_flags & TYPE_INSTANCE_FLAG_ADDRESS_CLASS_1)
+ return "__seg_fs";
+ if (type_flags & TYPE_INSTANCE_FLAG_ADDRESS_CLASS_2)
+ return "__seg_gs";
+ return NULL;
+}
+
+static int
+amd64_address_class_name_to_type_flags (struct gdbarch *gdbarch,
+ const char *name,
+ int *type_flags_ptr)
+{
+ if (strcmp (name, "__seg_fs") == 0)
+ {
+ *type_flags_ptr = TYPE_INSTANCE_FLAG_ADDRESS_CLASS_1;
+ return 1;
+ }
+ if (strcmp (name, "__seg_gs") == 0)
+ {
+ *type_flags_ptr = TYPE_INSTANCE_FLAG_ADDRESS_CLASS_2;
+ return 1;
+ }
+ return 0;
+}
+
+/* ??? We ought to fill in address_to_pointer and pointer_to_address,
+ except that these hooks do not have access to the thread, or a
+ regcache for the thread. */
+
+
/* Figure out where the longjmp will land. Slurp the jmp_buf out of
%rdi. We expect its value to be a pointer to the jmp_buf structure
from which we extract the address that we will land at. This
@@ -3093,6 +3141,14 @@ amd64_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
set_gdbarch_insn_is_call (gdbarch, amd64_insn_is_call);
set_gdbarch_insn_is_ret (gdbarch, amd64_insn_is_ret);
set_gdbarch_insn_is_jump (gdbarch, amd64_insn_is_jump);
+
+ /* Address handling. */
+ set_gdbarch_address_class_type_flags
+ (gdbarch, amd64_address_class_type_flags);
+ set_gdbarch_address_class_type_flags_to_name
+ (gdbarch, amd64_address_class_type_flags_to_name);
+ set_gdbarch_address_class_name_to_type_flags
+ (gdbarch, amd64_address_class_name_to_type_flags);
}
--
2.4.3