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[PATCH] PR tdep/9390: Fix possible typo on xstorxstormy16-tdep.c
- From: Sergio Durigan Junior <sergiodj at redhat dot com>
- To: GDB Patches <gdb-patches at sourceware dot org>
- Cc: Sergio Durigan Junior <sergiodj at redhat dot com>
- Date: Tue, 16 Sep 2014 16:14:25 -0400
- Subject: [PATCH] PR tdep/9390: Fix possible typo on xstorxstormy16-tdep.c
- Authentication-results: sourceware.org; auth=none
This patch (probably) fixes the bug described in PR tdep/9390, which
is about a wrong check in the following code:
...
/* optional copying of args in r2-r7 to r10-r13. */
/* Probably only in optimized case but legal action for prologue. */
else if ((inst & 0xff00) == 0x4600 /* 46SD mov rD, rS */
&& (inst & 0x00f0) >= 0x0020 && (inst & 0x00f0) <= 0x0070
&& (inst & 0x000f) >= 0x00a0 && (inst & 0x000f) <= 0x000d)
^^^^^^^^^^^^^^^^^^^^^^^^^
...
This condition will never trigger, and the fix proposed in the bug
(which made sense to me) was to test against 0x000a. I tried finding
documentation about this target, but couldn't find anything. I don't
even know if it is still used, but decided to submit the fix anyway.
Tested on my x86_64 Fedora 20 GNU/Linux.
gdb/ChangeLog:
2014-09-16 Sergio Durigan Junior <sergiodj@redhat.com>
PR tdep/9390
* xstorxstormy16-tdep.c (xstormy16_analyze_prologue): Fix possible
typo when using logical AND to determine instruction type.
---
gdb/ChangeLog | 6 ++++++
gdb/xstormy16-tdep.c | 2 +-
2 files changed, 7 insertions(+), 1 deletion(-)
diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 8216274..622976d 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,5 +1,11 @@
2014-09-16 Sergio Durigan Junior <sergiodj@redhat.com>
+ PR tdep/9390
+ * xstorxstormy16-tdep.c (xstormy16_analyze_prologue): Fix possible
+ typo when using logical AND to determine instruction type.
+
+2014-09-16 Sergio Durigan Junior <sergiodj@redhat.com>
+
* objc-lang.c (find_implementation_from_class): Remove dead code.
2014-09-16 Sergio Durigan Junior <sergiodj@redhat.com>
diff --git a/gdb/xstormy16-tdep.c b/gdb/xstormy16-tdep.c
index af3ff32..9692742 100644
--- a/gdb/xstormy16-tdep.c
+++ b/gdb/xstormy16-tdep.c
@@ -374,7 +374,7 @@ xstormy16_analyze_prologue (struct gdbarch *gdbarch,
/* Probably only in optimized case but legal action for prologue. */
else if ((inst & 0xff00) == 0x4600 /* 46SD mov rD, rS */
&& (inst & 0x00f0) >= 0x0020 && (inst & 0x00f0) <= 0x0070
- && (inst & 0x000f) >= 0x00a0 && (inst & 0x000f) <= 0x000d)
+ && (inst & 0x000f) >= 0x000a && (inst & 0x000f) <= 0x000d)
;
/* Optional copying of args in r2-r7 to stack. */
--
1.9.3