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[binutils-gdb] [ARM] Mark USER_SPECIFIED_MACHINE_TYPE in disassemble_info.flags
- From: Yao Qi <qiyao at sourceware dot org>
- To: gdb-cvs at sourceware dot org
- Date: 18 Aug 2017 08:30:38 -0000
- Subject: [binutils-gdb] [ARM] Mark USER_SPECIFIED_MACHINE_TYPE in disassemble_info.flags
https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=e60eb2880368b4e4752577c626ab0dadf0499cb5
commit e60eb2880368b4e4752577c626ab0dadf0499cb5
Author: Yao Qi <yao.qi@linaro.org>
Date: Fri Aug 18 09:30:12 2017 +0100
[ARM] Mark USER_SPECIFIED_MACHINE_TYPE in disassemble_info.flags
opcodes/arm-dis.c:print_insn may update disassemble_info.mach to
bfd_mach_arm_unknown unless USER_SPECIFIED_MACHINE_TYPE is marked.
When default_print_insn is called for the first time,
disassemble_info.mach is correctly set in GDB, but arm-dis.c:print_insn
sets it to bfd_mach_arm_unknown. Then, when default_print_insn is
called again (in a loop), it triggers the assert.
The patch fixes the assert by marking USER_SPECIFIED_MACHINE_TYPE so that
opcodes won't reset disassemble_info.mach.
gdb:
2017-08-18 Yao Qi <yao.qi@linaro.org>
PR tdep/21818
* arm-tdep.c (gdb_print_insn_arm): Mark
USER_SPECIFIED_MACHINE_TYPE if exec_bfd isn't NULL.
Diff:
---
gdb/ChangeLog | 6 ++++++
gdb/arm-tdep.c | 8 ++++++++
2 files changed, 14 insertions(+)
diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 2581935..5929091 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,5 +1,11 @@
2017-08-18 Yao Qi <yao.qi@linaro.org>
+ PR tdep/21818
+ * arm-tdep.c (gdb_print_insn_arm): Mark
+ USER_SPECIFIED_MACHINE_TYPE if exec_bfd isn't NULL.
+
+2017-08-18 Yao Qi <yao.qi@linaro.org>
+
* NEWS: Mention GDBserver's new option "--selftest".
* Makefile.in (SFILES): Remove selftest.c, add common/selftest.c.
* selftest.c: Move it to common/selftest.c.
diff --git a/gdb/arm-tdep.c b/gdb/arm-tdep.c
index a107584..0c1a0b3 100644
--- a/gdb/arm-tdep.c
+++ b/gdb/arm-tdep.c
@@ -7773,6 +7773,14 @@ gdb_print_insn_arm (bfd_vma memaddr, disassemble_info *info)
else
info->symbols = NULL;
+ /* GDB is able to get bfd_mach from the exe_bfd, info->mach is
+ accurate, so mark USER_SPECIFIED_MACHINE_TYPE bit. Otherwise,
+ opcodes/arm-dis.c:print_insn reset info->mach, and it will trigger
+ the assert on the mismatch of info->mach and bfd_get_mach (exec_bfd)
+ in default_print_insn. */
+ if (exec_bfd != NULL)
+ info->flags |= USER_SPECIFIED_MACHINE_TYPE;
+
return default_print_insn (memaddr, info);
}