Date: Mon, 5 Jan 2015 17:00:18 +0100 From: Roman Naumann <roman.naumann@fu-berlin.de> To: freebsd-questions@freebsd.org Subject: GDB SIGSEGV with 32 binaries on 10.1-amd64 Message-ID: <20150105160018.GA30902@bulldozer.local>
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Hi,
I noticed the GNU Debugger (GDB) seems to be unable to debug 32 bit binaries
on the FreeBSD amd64 platform.
A simple example gives a SIGSEGV when running the binaries in GDB, as shown below.
GDB 7.8 shows a warning. GDB 6.1 just reports the signal.
There exists a /libexec/ld-elf32.so.1, but I cannot figure out how to
make gdb use it. Maybe it will not fix the issue even if gdb uses this
library.
Ideas and hints much appreciated.
Best regards,
Roman
-- checked so far:
-> /usr/lib32 exists
-> recompile gdb7 from ports instead of using pkg
-- system:
FreeBSD bulldozer.local 10.1-RELEASE FreeBSD 10.1-RELEASE #3 r275043M:
Tue Nov 25 16:52:35 CET 2014
namor@bulldozer.local:/usr/obj/usr/src/sys/GENERIC amd64
-- how to reproduce:
[namor@bulldozer ~]$ cat test2.c
int main()
{
return 0;
}
[namor@bulldozer ~]$ gcc -m32 -o test2 test2.c
[namor@bulldozer ~]$ gdb test2
[namor@bulldozer ~]$ gdb78 test2
GNU gdb (GDB) 7.8 [GDB v7.8 for FreeBSD]
(...)
(gdb) run
Starting program: /grave/home/namor/test2
warning: `/libexec/ld-elf.so.1': Shared library architecture i386:x86-64 is not compatible with target architecture i386.
warning: `/libexec/ld-elf.so.1': Shared library architecture i386:x86-64 is not compatible with target architecture i386.
Program received signal SIGSEGV, Segmentation fault.
0x000004e3 in ?? ()
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