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authorAlan Modra <amodra@gmail.com>2001-03-19 12:20:10 +0000
committerAlan Modra <amodra@gmail.com>2001-03-19 12:20:10 +0000
commitbbe6d95f460afad7a02a4828fee94a8bf0a2ba63 (patch)
tree7a1888c2a790834459f4ab8a5bef0343ff664887 /opcodes
parent2e98d2de04d92a7486ea1007f82c93510aed16b1 (diff)
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Don't try to read past end of info buffer, and correct test results.
Diffstat (limited to 'opcodes')
-rw-r--r--opcodes/ChangeLog5
-rw-r--r--opcodes/vax-dis.c15
2 files changed, 18 insertions, 2 deletions
diff --git a/opcodes/ChangeLog b/opcodes/ChangeLog
index 38f7fdf..32185d8 100644
--- a/opcodes/ChangeLog
+++ b/opcodes/ChangeLog
@@ -1,3 +1,8 @@
+2001-03-19 John David Anglin <dave@hiauly1.hia.nrc.ca>
+
+ * vax-dis.c (print_insn_vax): Only fetch two bytes if the info buffer
+ has more than one byte left to read.
+
2001-03-16 Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390-opc.c: Add new opcodes. Smooth out formatting.
diff --git a/opcodes/vax-dis.c b/opcodes/vax-dis.c
index d6cb900..e33f87e 100644
--- a/opcodes/vax-dis.c
+++ b/opcodes/vax-dis.c
@@ -1,5 +1,5 @@
/* Print VAX instructions.
- Copyright 1995, 1998, 2000 Free Software Foundation, Inc.
+ Copyright 1995, 1998, 2000, 2001 Free Software Foundation, Inc.
Contributed by Pauline Middelink <middelin@polyware.iaf.nl>
This program is free software; you can redistribute it and/or modify
@@ -126,7 +126,18 @@ print_insn_vax (memaddr, info)
return -1;
}
- FETCH_DATA (info, buffer + 2);
+ /* Check if the info buffer has more than one byte left since
+ the last opcode might be a single byte with no argument data. */
+ if (info->buffer_length - (memaddr - info->buffer_vma) > 1)
+ {
+ FETCH_DATA (info, buffer + 2);
+ }
+ else
+ {
+ FETCH_DATA (info, buffer + 1);
+ buffer[1] = 0;
+ }
+
for (votp = &votstrs[0]; votp->name[0]; votp++)
{
register vax_opcodeT opcode = votp->detail.code;