From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 14423 invoked by alias); 4 Jan 2005 08:41:35 -0000 Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Archive: List-Post: List-Help: Sender: gcc-bugs-owner@gcc.gnu.org Received: (qmail 14361 invoked by uid 48); 4 Jan 2005 08:41:27 -0000 Date: Tue, 04 Jan 2005 08:41:00 -0000 From: "gleb76 at gmail dot com" To: gcc-bugs@gcc.gnu.org Message-ID: <20050104084124.19251.gleb76@gmail.com> Reply-To: gcc-bugzilla@gcc.gnu.org Subject: [Bug c/19251] New: gstabs emits wrong entry for "unsigned int/long" types on powerpc X-Bugzilla-Reason: CC X-SW-Source: 2005-01/txt/msg00323.txt.bz2 List-Id: Hello, I have problem with gcc3.x and stabs debugging format on powerpc (ppc32 603e). gdb doesn't recognize builtin unsigned int/long formats. I compile the following program with: powerpc-gcc -gstabs a.c int main() { unsigned int a; int b; return 0; } and try to debug it: > gdb a.out (gdb) b main Breakpoint 1 at 0x100003bc: file a.c, line 6. (gdb) r Starting program: a.out Breakpoint 1, main () at a.c:6 6 return 0; (gdb) info locals a = b = -1 (gdb) q The program is running. Exit anyway? (y or n) y > After little investigation I discovered that gcc emits wrong stabs entry for unsigned int format. .stabs "unsigned int:t(0,4)=r(0,4);0;4294967295;",128,0,0,0 The problem is with the max value. According to gdb source code if the value too big for int it should be emitted in octal. Here is what gcc for intel emits in this case by the way: .stabs "unsigned int:t(0,4)=r(0,4);0;-1;",128,0,0,0 After further investigation I saw that HOST_BITS_PER_WIDE_INT for powerpc is defined to 64 and gdb rightfully things that widest int is 32 bit long on my 32 bit powerpc CPU and bails out since constant from stabs entry is to big. The definition of HOST_BITS_PER_WIDE_INT depends on need_64bit_hwint from config.gcc and it's set to "yes" for all powerpc CPUs there. I've removed definition of need_64bit_hwint for powerpc and the result compiler emits right stab entry now, but it can't compile glibc. The error is in file glibc-2.3.2/sysdeps/unix/sysv/linux/powerpc/sys/procfs.h. It uses __uint128_t and gcc provides it only if HOST_BITS_PER_WIDE_INT is at least 64 bits. -- Summary: gstabs emits wrong entry for "unsigned int/long" types on powerpc Product: gcc Version: 3.4.3 Status: UNCONFIRMED Severity: normal Priority: P2 Component: c AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: gleb76 at gmail dot com CC: gcc-bugs at gcc dot gnu dot org GCC build triplet: i686-linux-gnu GCC host triplet: i686-linux-gnu GCC target triplet: powerpc-linux-gnu http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19251