diff options
| author | Waldemar Brodkorb <wbx@openadk.org> | 2015-10-17 11:17:07 +0200 |
|---|---|---|
| committer | Waldemar Brodkorb <wbx@uclibc-ng.org> | 2015-10-19 01:37:11 +0200 |
| commit | 312f482d395b591398296b5472a3884a12716cbd (patch) | |
| tree | 682402fa4c470d4aa7c1334f7616408779559a8f /libc/sysdeps/linux/lm32/vfork.S | |
| parent | c807e03c88504cf01508daa6dbae9e93dacfcf3c (diff) | |
lm32: add new architecture
Add support for FPGA systems from Lattice Semiconductor
http://www.latticesemi.com
Merge https://github.com/m-labs/uclibc-lm32.git
Diffstat (limited to 'libc/sysdeps/linux/lm32/vfork.S')
| -rw-r--r-- | libc/sysdeps/linux/lm32/vfork.S | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/lm32/vfork.S b/libc/sysdeps/linux/lm32/vfork.S new file mode 100644 index 000000000..f651ba6f8 --- /dev/null +++ b/libc/sysdeps/linux/lm32/vfork.S @@ -0,0 +1,42 @@ +#include <features.h> + +#define _ERRNO_H +#include <bits/errno.h> +#include <asm/unistd.h> +#define _SIGNAL_H +#include <bits/signum.h> + +#define CLONE_VM 0x00000100 /* set if VM shared between processes */ +#define CLONE_VFORK 0x00004000 /* set if the parent wants the child to */ + +.text +.global __vfork +.hidden __vfork +.type __vfork,%function +.align 4 + +__vfork: + mvi r2, 0 + mvi r3, CLONE_VFORK | CLONE_VM | SIGCHLD + mvi r8, __NR_clone + scall + + mvi r2, -4096 + bgeu r2, r1, 1f + + addi sp, sp, -8 + sw (sp+4), ra + sw (sp+8), r1 + calli __errno_location + lw r2, (sp+8) + lw ra, (sp+4) + sub r2, r0, r2 + sw (r1+0), r2 + addi sp, sp, 8 + mvi r1, -1 +1: + ret + +.size __vfork,.-__vfork +weak_alias(__vfork,vfork) +libc_hidden_weak(vfork) |