unfortunately the common vfork implementation, which just use the syscall function to interact with the kernel, does not work on the cris architecture. The system call vfork is special, on most architectures just calling syscall is not enough. The patch below adds the vfork implementation from klibc. License should be compatible.
Signed-off-by: Waldemar Brodkorb <w...@openadk.org> --- libc/sysdeps/linux/cris/Makefile.arch | 2 +- libc/sysdeps/linux/cris/vfork.S | 33 +++++++++++++++++++++++++++++++++ 2 files changed, 34 insertions(+), 1 deletions(-) create mode 100644 libc/sysdeps/linux/cris/vfork.S diff --git a/libc/sysdeps/linux/cris/Makefile.arch b/libc/sysdeps/linux/cris/Makefile.arch index 43e1912..8a682b0 100644 --- a/libc/sysdeps/linux/cris/Makefile.arch +++ b/libc/sysdeps/linux/cris/Makefile.arch @@ -7,7 +7,7 @@ CSRC := __init_brk.c brk.c sbrk.c -SSRC := setjmp.S __longjmp.S clone.S sysdep.S syscall.S +SSRC := setjmp.S __longjmp.S clone.S sysdep.S syscall.S vfork.S ifeq ($(UNIFIED_SYSCALL),y) SSRC += __uClibc_syscall.S endif diff --git a/libc/sysdeps/linux/cris/vfork.S b/libc/sysdeps/linux/cris/vfork.S new file mode 100644 index 0000000..22b3d5d --- /dev/null +++ b/libc/sysdeps/linux/cris/vfork.S @@ -0,0 +1,33 @@ +/* + * vfork.S + * + * On cris, r9 contains the syscall number (set by generated stub); + * r10..r13 contain arguments 0-3 per the standard calling convention. + * The return address is in $srp; so we just need to avoid the stack + * usage of the normal syscall stubs. + */ + +#include <asm/unistd.h> +#include <sys/syscall.h> + + .section ".text","ax" + .balign 4 + .globl __vfork + .type __vfork,@function +__vfork: + move.d __NR_vfork, $r9 + break 13 + + cmps.w -4096,$r10 + blo 1f + neg.d $r10,$r11 + move.d $r11,[errno] + moveq -1,$r10 +1: + ret + nop + + .size __vfork,.-__vfork + +weak_alias(__vfork,vfork) +libc_hidden_weak(vfork) -- 1.7.4.1 _______________________________________________ uClibc mailing list uClibc@uclibc.org http://lists.busybox.net/mailman/listinfo/uclibc
