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src/gdb ChangeLog i387-tdep.c testsuite/Change ...
- From: palves at sourceware dot org
- To: gdb-cvs at sourceware dot org
- Date: Fri, 19 Apr 2013 14:15:51 +0000
- Subject: src/gdb ChangeLog i387-tdep.c testsuite/Change ...
CVSROOT: /cvs/src
Module name: src
Branch: gdb_7_6-branch
Changes by: palves@sourceware.org 2013-04-19 14:15:51
Modified files:
gdb : ChangeLog i387-tdep.c
gdb/testsuite : ChangeLog
Added files:
gdb/testsuite/gdb.arch: i386-float.S i386-float.exp
Log message:
Fix the x87 FP register printout when issuing the âinfo floatâ command.
Consider the following simple program:
.globl _start
.text
_start:
fldt val
.data
val: .byte 0x00,0x00,0x45,0x07,0x11,0x19,0x22,0xe9,0xfe,0xbf
With current GDB on x86-64 GNU/Linux hosts, after the moment the fldt
command has been executed the register st(0) looks like this,
according to the âinfo regsâ output (TOP=7):
R7: Valid 0xffffffbffffffffeffffffe922191107450000 -0.910676542908976927
which is clearly wrong (just count its length). The problem is due to
the printf statement (see patch) printing a promoted integer value of
a char argument "raw[i]", and, since char is signed on x86-64
GNU/Linux, the erroneous âffffffâ are printed for the first three
bytes which turn out to be "negative". The fix is to use gdb_byte
instead which is unsigned (and is the type of value_contents(), the
type to be used for raw target bytes anyway). After the fix the value
will be printed correctly:
R7: Valid 0xbffee922191107450000 -0.910676542908976927
gdb/
2013-04-19 Vladimir Kargov <kargov@gmail.com>
Pedro Alves <palves@redhat.com>
* i387-tdep.c (i387_print_float_info): Use gdb_byte for pointer to
value contents.
gdb/testsuite/
2013-04-19 Vladimir Kargov <kargov@gmail.com>
Pedro Alves <palves@redhat.com>
* gdb.arch/i386-float.S: New file.
* gdb.arch/i386-float.exp: New file.
Patches:
http://sourceware.org/cgi-bin/cvsweb.cgi/src/gdb/ChangeLog.diff?cvsroot=src&only_with_tag=gdb_7_6-branch&r1=1.15260.2.40&r2=1.15260.2.41
http://sourceware.org/cgi-bin/cvsweb.cgi/src/gdb/i387-tdep.c.diff?cvsroot=src&only_with_tag=gdb_7_6-branch&r1=1.76&r2=1.76.2.1
http://sourceware.org/cgi-bin/cvsweb.cgi/src/gdb/testsuite/ChangeLog.diff?cvsroot=src&only_with_tag=gdb_7_6-branch&r1=1.3580.2.14&r2=1.3580.2.15
http://sourceware.org/cgi-bin/cvsweb.cgi/src/gdb/testsuite/gdb.arch/i386-float.S.diff?cvsroot=src&only_with_tag=gdb_7_6-branch&r1=NONE&r2=1.1.2.2
http://sourceware.org/cgi-bin/cvsweb.cgi/src/gdb/testsuite/gdb.arch/i386-float.exp.diff?cvsroot=src&only_with_tag=gdb_7_6-branch&r1=NONE&r2=1.1.2.2