Re: gcc-4.3.1 for mips linux failed to execute dynamically linked elf executables

["hjksfw hjksfw" <hjksfw at gmail dot com>]

Thanks very much.
I change glibc from 2.4 to 2.7 and the resulted cross-compiled
mips-linux-gcc 4.3.1 worked well for both kernel and dynamically
linked elf executables.

在 08-9-3，David Daney<ddaney@avtrex.com> 写道：
> hjksfw hjksfw wrote:
> > Hi all, I have build mips-linux-gcc on debian i486 pc from  following
> sources:
> > Gcc-4.3.1
> > Binutils-2.18
> > Glibc-2.4
> > Kernel-headers-2.6.18
> .
> .
> .
> > when I compile linux-2.6.18 from mips-linux-gcc 4.3.1, there is an error:
> >
> .
> .
> .
> >
> > the kernel compiled successfully.But mips-linux-gcc-4.1.1 have no such
> problem.
>
> Perhaps you should stick to gcc-4.1.1 for your kernel.
>
> > And the following is problems for dynamically linked elf.
> > A simplest test program:
> > #include
> > int main()
> > {
> >         printf("hello mips\n");
> >        return 0;
> > }
> >
> >
> > mips-linux-gcc test.c ?o test-dyn
> > Mips-linux-gcc test.c ?o test-static ?static
> >
> >
> > $ file ./test-dyn
> > ./test-dyn: ELF 32-bit MSB MIPS64 executable, MIPS, version 1 (SYSV),
> > for GNU/Linux 2.0.0, dynamically linked (uses shared libs), not
> > stripped
> > $ file ./test-static
> > ./test-static: ELF 32-bit MSB MIPS64 executable, MIPS, version 1
> > (SYSV), for GNU/Linux 2.0.0, statically linked, not stripped
> >
> > The strace results on the target mips board are following,(strace is
> > statically linked, so it can be executed):
> > Strace the program:
> > / # strace ./test-dyn
> > execve("./test-dyn", ["./test-dyn"], [/* 6 vars */]) = 0
> > do_page_fault() #2: sending SIGSEGV to test-dyn for invalid read
> access from
> > 0002e258 (epc == 2aabf140, ra == 2aab4f70)
> > uname({sys="Linux", node="192.168.172.44", ...}) = 0
> > old_mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS,
> > -1, 0) = 0x2aac5000
> > access("/etc/ld.so.preload", R_OK)      = 0
> > open("/etc/ld.so.preload", O_RDONLY)    = 3
> > fstat64(3, {st_mode=S_IFREG|0644, st_size=0, ...}) = 0
> > close(3)                                = 0
> > --- SIGSEGV (Segmentation fault) @ 0 (0) ---
> > +++ killed by SIGSEGV +++
> > Process 98 detached
> > / # strace ./test-static
> > execve("./test-static", ["./test-static"], [/* 6 vars */]) = 0
> > svr4_syscall()                          = 4122
> > svr4_syscall()                          = 4045
> > brk(0x494c98)                           = 0x494c98
> > set_thread_area(0x49b460)               = -2143376080
> > brk(0x4b5c98)                           = 0x4b5c98
> > brk(0x4b6000)                           = 0x4b6000
> > fstat64(1, {st_mode=S_IFCHR|0646, st_rdev=makedev(5, 1), ...}) = 0
> > ioctl(1, TIOCNXCL, {B115200 opost isig icanon echo ...}) = 0
> > old_mmap(NULL, 131072, PROT_READ|PROT_WRITE,
> > MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2aaa8000
> > write(1, "hello mips\n", 11hello mips
> > )            = 11
> > exit_group(0)                           = ?
> > Process 100 detached
> >
> > I don't know what's wrong with the mips-linux-gcc 4.3.1, would you
> > help me please?
>
> I don't think gcc-4.3.x is supported by any version of glibc prior to
> 2.8.  Best to use a supported version of gcc when building glibc.
>
> I have successfully used gcc-4.3.x on several different mips
> platforms.  But I only build glibc with supported compiler versions.
> You could try upgrading to glibc 2.7 or 2.8.  Or ...
>
> > And I have also tried to cross-compile gcc for mips-linux from:
> > Gcc-4.1.1
> > Binutils-2.17
> > Glibc-2.4
> > kernel-headers-2.6.18
> > This cross-compiled gcc worked fine for both kernel and programs.
>
> ...Use these versions as they seem to work for you.
>
> David Daney
>