diff options
| -rw-r--r-- | arch/Kconfig | 14 | ||||
| -rw-r--r-- | include/asm-generic/syscalls.h | 7 | ||||
| -rw-r--r-- | kernel/fork.c | 43 |
3 files changed, 60 insertions, 4 deletions
diff --git a/arch/Kconfig b/arch/Kconfig index 366ec06a5185..8d698fb5ccc9 100644 --- a/arch/Kconfig +++ b/arch/Kconfig @@ -341,4 +341,18 @@ config MODULES_USE_ELF_REL Modules only use ELF REL relocations. Modules with ELF RELA relocations will give an error. +# +# ABI hall of shame +# +config CLONE_BACKWARDS + bool + help + Architecture has tls passed as the 4th argument of clone(2), + not the 5th one. + +config CLONE_BACKWARDS2 + bool + help + Architecture has the first two arguments of clone(2) swapped. + source "kernel/gcov/Kconfig" diff --git a/include/asm-generic/syscalls.h b/include/asm-generic/syscalls.h index d89dec864d42..7e4fdb649951 100644 --- a/include/asm-generic/syscalls.h +++ b/include/asm-generic/syscalls.h @@ -10,16 +10,15 @@ */ #ifndef sys_clone asmlinkage long sys_clone(unsigned long clone_flags, unsigned long newsp, - void __user *parent_tid, void __user *child_tid, - struct pt_regs *regs); + void __user *parent_tid, void __user *child_tid); #endif #ifndef sys_fork -asmlinkage long sys_fork(struct pt_regs *regs); +asmlinkage long sys_fork(void); #endif #ifndef sys_vfork -asmlinkage long sys_vfork(struct pt_regs *regs); +asmlinkage long sys_vfork(void); #endif #ifndef sys_execve diff --git a/kernel/fork.c b/kernel/fork.c index 8b20ab7d3aa2..27a337549dab 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -1645,6 +1645,49 @@ pid_t kernel_thread(int (*fn)(void *), void *arg, unsigned long flags) } #endif +#ifdef __ARCH_WANT_SYS_FORK +SYSCALL_DEFINE0(fork) +{ +#ifdef CONFIG_MMU + return do_fork(SIGCHLD, 0, current_pt_regs(), 0, NULL, NULL); +#else + /* can not support in nommu mode */ + return(-EINVAL); +#endif +} +#endif + +#ifdef __ARCH_WANT_SYS_VFORK +SYSCALL_DEFINE0(vfork) +{ + return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, 0, current_pt_regs(), + 0, NULL, NULL); +} +#endif + +#ifdef __ARCH_WANT_SYS_CLONE +#ifdef CONFIG_CLONE_BACKWARDS +SYSCALL_DEFINE5(clone, unsigned long, clone_flags, unsigned long, newsp, + int __user *, parent_tidptr, + int, tls_val, + int __user *, child_tidptr) +#elif defined(CONFIG_CLONE_BACKWARDS2) +SYSCALL_DEFINE5(clone, unsigned long, newsp, unsigned long, clone_flags, + int __user *, parent_tidptr, + int __user *, child_tidptr, + int, tls_val) +#else +SYSCALL_DEFINE5(clone, unsigned long, clone_flags, unsigned long, newsp, + int __user *, parent_tidptr, + int __user *, child_tidptr, + int, tls_val) +#endif +{ + return do_fork(clone_flags, newsp, current_pt_regs(), 0, + parent_tidptr, child_tidptr); +} +#endif + #ifndef ARCH_MIN_MMSTRUCT_ALIGN #define ARCH_MIN_MMSTRUCT_ALIGN 0 #endif |