diff options
Diffstat (limited to 'src/c_bsdsetsid.S')
| -rw-r--r-- | src/c_bsdsetsid.S | 54 |
1 files changed, 25 insertions, 29 deletions
diff --git a/src/c_bsdsetsid.S b/src/c_bsdsetsid.S index 4c9189c..b0027f9 100644 --- a/src/c_bsdsetsid.S +++ b/src/c_bsdsetsid.S @@ -39,32 +39,47 @@ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * * bsdsetsid: src/c_bsdsetsid.S - * 2020-11-18 12:37 + * 2020-11-20 18:18 * Joe * * This is the entrypoint of the program. */ .text -.extern u_strlen -.extern u_pout -.extern u_perr .globl main main: cmpb $0x1, %dil - jle c_noarg + jle e_noarg xor %rax, %rax - movb $0x2, %al /* SYS_fork */ + movb $0x2, %al syscall - jc c_fork_fail + jc e_fork cmp $0x0, %rax je c_child -c_child: +c_parent: + mov %rax, %rdi +# xor %r8, %r8 +# lea (%r8), %rsi + mov $0x0, %rdx + mov $0x0, %rcx xor %rax, %rax - movb $0x93, %al /* SYS_setsid */ + movb $0x7, %al /* SYS_wait4 */ syscall + + xor %rdi, %rdi + movb %al, %dil + movb $0x7, %al + xor %rax, %rax + movb $0x1, %al /* SYS_exit */ + syscall + +c_child: +# xor %rax, %rax +# movb $0x93, %al /* SYS_setsid */ +# syscall +# jc e_setsid xor %rax, %rax push %rsi mov $0x1, %rcx @@ -72,31 +87,12 @@ c_child: lea 0(%rsi, %rcx, 8), %rsi movb $0x3b, %al /* SYS_execve */ syscall + jc e_execve pop %rsi jmp c_exit -c_fork_fail: - lea forkfail_str, %rdi - call u_perr - mov $0x2, %rdi - xor %rax, %rax - movb $0x1, %al /* SYS_exit */ - syscall - -c_noarg: - lea noarg_str, %rdi - call u_perr - mov $0x1, %rdi - xor %rax, %rax - movb $0x1, %al /* SYS_exit */ - syscall - c_exit: xor %rdi, %rdi xor %rax, %rax movb $0x1, %al /* SYS_exit */ syscall - -.data -noarg_str: .asciz "bsdsetsid: no command specified" -forkfail_str: .asciz "bsdsetsid: fork failed" |