diff options
Diffstat (limited to 'mdk-stage1/dietlibc/x86_64/clone.S')
| -rw-r--r-- | mdk-stage1/dietlibc/x86_64/clone.S | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/mdk-stage1/dietlibc/x86_64/clone.S b/mdk-stage1/dietlibc/x86_64/clone.S new file mode 100644 index 000000000..82c8c5bae --- /dev/null +++ b/mdk-stage1/dietlibc/x86_64/clone.S @@ -0,0 +1,64 @@ +#include "syscalls.h" +#include <errno.h> +#include "dietwarning.h" + +.text +.type clone,@function +.weak clone +clone: +.type __clone,@function +.global __clone +__clone: + movl $-EINVAL,%eax + testq %rdi,%rdi /* have non null thread_funcion */ + jz .Lclone_error + testq %rsi,%rsi /* have non null child_stack pointer */ + jz .Lclone_error + + /* put the parameters on thread stack */ + subq $16,%rsi + movq %rcx,8(%rsi) /* thread parameter */ + movq %rdi,0(%rsi) /* thread function */ + + /* syscall */ + movq %rdx,%rdi + movl $__NR_clone,%eax + syscall + cmpl $0,%eax + jl .Lclone_error + jne .Lreturn + +.thread_start: + /* call thread function */ + popq %rax + popq %rdi + call *%rax + /* exit a thread */ + movq %rax,%rdi +#ifdef PIC + jmp _exit@PLT +#else + jmp _exit +#endif + +.Lclone_error: + /* set errno */ + negl %eax + pushq %rax +#ifdef PIC + call __errno_location@PLT +#else + call __errno_location +#endif + popq %rcx + movl %ecx,(%rax) + orq $-1, %rax + +.Lreturn: + /* just return */ + ret + +link_warning("clone", "warning: clone() not yet tested") +link_warning("__clone", "warning: clone() not yet tested") +//link_warning("clone", "warning: clone() not yet implemented") +//link_warning("__clone", "warning: clone() not yet implemented") |