From: Kevin Buettner <kevinb@redhat.com>
To: gdb-patches@sourceware.org
Subject: [PATCH 5/8] Implement unconditional_branch_address method for arm and thumb
Date: Wed, 19 Aug 2015 07:08:00 -0000 [thread overview]
Message-ID: <20150819000844.60224486@pinnacle.lan> (raw)
In-Reply-To: <20150818235334.1afb0c85@pinnacle.lan>
Implement unconditional_branch_address method for arm and thumb.
gdb/ChangeLog:
* arm-tdep.c (arm_unconditional_branch_address): New function.
(arm_gdbarch_init): Register arm_unconditional_branch_address.
---
gdb/arm-tdep.c | 29 +++++++++++++++++++++++++++++
1 file changed, 29 insertions(+)
diff --git a/gdb/arm-tdep.c b/gdb/arm-tdep.c
index 73f26b9..2e16a28 100644
--- a/gdb/arm-tdep.c
+++ b/gdb/arm-tdep.c
@@ -9902,7 +9902,32 @@ arm_register_g_packet_guesses (struct gdbarch *gdbarch)
/* Otherwise we don't have a useful guess. */
}
+\f
+/* Implement the unconditional_branch_address gdbarch method. */
+
+static CORE_ADDR
+arm_unconditional_branch_address (struct gdbarch *gdbarch, CORE_ADDR pc)
+{
+ enum bfd_endian byte_order_for_code = gdbarch_byte_order_for_code (gdbarch);
+ unsigned int insn;
+
+ if (arm_pc_is_thumb (gdbarch, pc))
+ {
+ insn = read_memory_unsigned_integer (pc, 2, byte_order_for_code);
+ if ((insn & 0xf800) == 0xe000)
+ return pc + 4 + (sbits (insn, 0, 10) << 1);
+ }
+ else
+ {
+ insn = read_memory_unsigned_integer (pc, 4, byte_order_for_code);
+
+ if (bits (insn, 28, 31) == INST_AL && bits (insn, 24, 27) == 0xa)
+ return BranchDest (pc, insn);
+ }
+
+ return 0;
+}
\f
/* Initialize the current architecture based on INFO. If possible,
re-use an architecture from ARCHES, which is a list of
@@ -10499,6 +10524,10 @@ arm_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
user_reg_add (gdbarch, arm_register_aliases[i].name,
value_of_arm_user_reg, &arm_register_aliases[i].regnum);
+ /* Unconditional Branch. */
+ set_gdbarch_unconditional_branch_address (gdbarch,
+ arm_unconditional_branch_address);
+
return gdbarch;
}
next prev parent reply other threads:[~2015-08-19 7:08 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-08-19 6:53 [PATCH 0/8] Break at each iteration for breakpoints placed on a while statement Kevin Buettner
2015-08-19 6:58 ` [PATCH 1/8] Add new test, gdb.base/loop-break.exp Kevin Buettner
2015-08-25 12:10 ` Pedro Alves
2015-09-18 0:50 ` Kevin Buettner
2016-02-01 20:00 ` Kevin Buettner
2016-02-15 16:51 ` Kevin Buettner
2016-02-29 16:17 ` Kevin Buettner
2015-09-22 0:11 ` Kevin Buettner
2015-08-19 7:00 ` [PATCH 2/8] Add new gdbarch method, unconditional_branch_address Kevin Buettner
2015-08-25 12:13 ` Pedro Alves
2015-09-18 1:14 ` Kevin Buettner
2015-09-18 12:02 ` Andrew Burgess
2015-09-18 12:06 ` Andrew Burgess
2015-09-18 12:26 ` Kevin Buettner
2015-09-18 12:24 ` Kevin Buettner
2015-09-22 16:09 ` Yao Qi
2015-09-22 18:03 ` Kevin Buettner
2015-08-19 7:03 ` [PATCH 3/8] Break at each iteration for breakpoints placed on a while statement Kevin Buettner
2015-08-25 12:10 ` Pedro Alves
2015-09-18 1:57 ` Kevin Buettner
2015-09-30 12:17 ` Pedro Alves
2015-10-01 1:13 ` Kevin Buettner
2015-10-01 4:09 ` Doug Evans
2015-08-19 7:06 ` [PATCH 4/8] Implement unconditional_branch_address method for x86-64 and i386 Kevin Buettner
2015-09-18 2:03 ` Kevin Buettner
2015-08-19 7:08 ` Kevin Buettner [this message]
2015-08-19 7:11 ` [PATCH 6/8] Implement unconditional_branch_address method for powerpc / rs6000 Kevin Buettner
2015-08-19 7:13 ` [PATCH 7/8] Implement unconditional_branch_address method for rl78 Kevin Buettner
2015-08-19 7:15 ` [PATCH 8/8] Implement unconditional_branch_address method for rx Kevin Buettner
2016-01-18 16:48 ` [PATCH 0/8] Break at each iteration for breakpoints placed on a while statement Kevin Buettner
2016-04-04 15:56 ` Yao Qi
2016-04-14 16:31 ` Luis Machado
2016-04-15 11:59 ` Yao Qi
2016-04-15 19:48 ` Kevin Buettner
2016-04-15 22:34 ` Pedro Alves
2016-04-19 16:24 ` Kevin Buettner
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