Thanks very much.I change glibc from 2.4 to 2.7 and the resulted cross-compiledmips-linux-gcc 4.3.1 worked well for both kernel and dynamicallylinked elf executables.
在 08-9-3，David Daney<ddaney@xxxxxxxxxx> 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>
