assembler/echo-server
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No more zombies.

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number Zero 2016-02-21 01:15:38 +03:00
parent 81e488e287
commit 8a8aab4f9b
2 changed files with 13 additions and 9 deletions
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8
func.S
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@ -17,7 +17,7 @@
errstr: .ascii "error happened\n" errstr: .ascii "error happened\n"
.set errstr_len, .-errstr .set errstr_len, .-errstr
.set buffer_size, 1024 .set buffer_size, 1024*1024
buffer: .skip buffer_size, 0 buffer: .skip buffer_size, 0
.text .text
@ -105,9 +105,7 @@ error:
movq $errstr, %rsi movq $errstr, %rsi
movq $errstr_len, %rdx movq $errstr_len, %rdx
syscall syscall
exit:
movq $__NR_exit, %rax movq $__NR_exit, %rax
movq $0, %rdi movq $2, %rdi
movq $0, %rsi
syscall syscall
movq $0, 0

14
main.S
View File

@ -8,7 +8,8 @@
#define PF_INET 2 #define PF_INET 2
#define AF_INET PF_INET #define AF_INET PF_INET
#define SOCK_STREAM 1 #define SOCK_STREAM 1
#define CLONE_PARENT 0x00008000
#define PORT 20335 #define PORT 20335
@ -100,8 +101,13 @@ loop:
movq $message_len, %rdx movq $message_len, %rdx
call write_buf call write_buf
movq $__NR_fork, %rax movq $__NR_clone, %rax
syscall /* fork! */ movq $CLONE_PARENT, %rdi
movq $0, %rsi
movq $0, %rdx
movq $0, %r10
movq $0, %r8
syscall /* fork! (through clone()) */
cmp $-1, %rax cmp $-1, %rax
jz error jz error
test %rax, %rax test %rax, %rax
@ -135,7 +141,7 @@ error:
syscall syscall
movq $__NR_exit, %rax movq $__NR_exit, %rax
movq $0, %rdi movq $1, %rdi
syscall syscall
/* this line is unreachable */ /* this line is unreachable */