diff options
| -rw-r--r-- | arch/arm64/include/asm/syscalls.h | 11 | ||||
| -rw-r--r-- | arch/arm64/include/asm/unistd32.h | 6 | ||||
| -rw-r--r-- | arch/arm64/kernel/entry.S | 5 | ||||
| -rw-r--r-- | arch/arm64/kernel/process.c | 10 | ||||
| -rw-r--r-- | arch/arm64/kernel/sys.c | 11 | ||||
| -rw-r--r-- | arch/arm64/kernel/sys32.S | 14 | ||||
| -rw-r--r-- | arch/arm64/kernel/sys_compat.c | 20 |
7 files changed, 25 insertions, 52 deletions
diff --git a/arch/arm64/include/asm/syscalls.h b/arch/arm64/include/asm/syscalls.h index 81680a0ae913..a1b00cd6f786 100644 --- a/arch/arm64/include/asm/syscalls.h +++ b/arch/arm64/include/asm/syscalls.h @@ -23,15 +23,16 @@ /* * System call wrappers implemented in kernel/entry.S. */ -asmlinkage long sys_clone_wrapper(unsigned long clone_flags, - unsigned long newsp, - void __user *parent_tid, - unsigned long tls_val, - void __user *child_tid); asmlinkage long sys_rt_sigreturn_wrapper(void); asmlinkage long sys_sigaltstack_wrapper(const stack_t __user *uss, stack_t __user *uoss); +/* + * AArch64 sys_clone implementation has a different prototype than the generic + * one (additional TLS value argument). + */ +#define sys_clone sys_clone + #include <asm-generic/syscalls.h> #endif /* __ASM_SYSCALLS_H */ diff --git a/arch/arm64/include/asm/unistd32.h b/arch/arm64/include/asm/unistd32.h index 9035e6add3e4..d9850cf9870d 100644 --- a/arch/arm64/include/asm/unistd32.h +++ b/arch/arm64/include/asm/unistd32.h @@ -23,7 +23,7 @@ __SYSCALL(0, sys_restart_syscall) __SYSCALL(1, sys_exit) -__SYSCALL(2, compat_sys_fork_wrapper) +__SYSCALL(2, compat_sys_fork) __SYSCALL(3, sys_read) __SYSCALL(4, sys_write) __SYSCALL(5, compat_sys_open) @@ -141,7 +141,7 @@ __SYSCALL(116, compat_sys_sysinfo) __SYSCALL(117, sys_ni_syscall) /* 117 was sys_ipc */ __SYSCALL(118, sys_fsync) __SYSCALL(119, compat_sys_sigreturn_wrapper) -__SYSCALL(120, compat_sys_clone_wrapper) +__SYSCALL(120, sys_clone) __SYSCALL(121, sys_setdomainname) __SYSCALL(122, sys_newuname) __SYSCALL(123, sys_ni_syscall) /* 123 was sys_modify_ldt */ @@ -211,7 +211,7 @@ __SYSCALL(186, compat_sys_sigaltstack_wrapper) __SYSCALL(187, compat_sys_sendfile) __SYSCALL(188, sys_ni_syscall) /* 188 reserved */ __SYSCALL(189, sys_ni_syscall) /* 189 reserved */ -__SYSCALL(190, compat_sys_vfork_wrapper) +__SYSCALL(190, compat_sys_vfork) __SYSCALL(191, compat_sys_getrlimit) /* SuS compliant getrlimit */ __SYSCALL(192, sys_mmap_pgoff) __SYSCALL(193, compat_sys_truncate64_wrapper) diff --git a/arch/arm64/kernel/entry.S b/arch/arm64/kernel/entry.S index 616531862d52..cbfa4d28100e 100644 --- a/arch/arm64/kernel/entry.S +++ b/arch/arm64/kernel/entry.S @@ -676,11 +676,6 @@ __sys_trace_return: /* * Special system call wrappers. */ -ENTRY(sys_clone_wrapper) - mov x5, sp - b sys_clone -ENDPROC(sys_clone_wrapper) - ENTRY(sys_rt_sigreturn_wrapper) mov x0, sp b sys_rt_sigreturn diff --git a/arch/arm64/kernel/process.c b/arch/arm64/kernel/process.c index a430b5cad308..8a5f3341861e 100644 --- a/arch/arm64/kernel/process.c +++ b/arch/arm64/kernel/process.c @@ -246,14 +246,20 @@ int copy_thread(unsigned long clone_flags, unsigned long stack_start, *childregs = *regs; childregs->regs[0] = 0; if (is_compat_thread(task_thread_info(p))) { - childregs->compat_sp = stack_start; + if (stack_start) + childregs->compat_sp = stack_start; } else { /* * Read the current TLS pointer from tpidr_el0 as it may be * out-of-sync with the saved value. */ asm("mrs %0, tpidr_el0" : "=r" (tls)); - childregs->sp = stack_start; + if (stack_start) { + /* 16-byte aligned stack mandatory on AArch64 */ + if (stack_start & 15) + return -EINVAL; + childregs->sp = stack_start; + } } /* * If a TLS pointer was passed to clone (4th argument), use it diff --git a/arch/arm64/kernel/sys.c b/arch/arm64/kernel/sys.c index 9c77c0bacc1d..4364df85050e 100644 --- a/arch/arm64/kernel/sys.c +++ b/arch/arm64/kernel/sys.c @@ -31,14 +31,10 @@ */ asmlinkage long sys_clone(unsigned long clone_flags, unsigned long newsp, int __user *parent_tidptr, unsigned long tls_val, - int __user *child_tidptr, struct pt_regs *regs) + int __user *child_tidptr) { - if (!newsp) - newsp = regs->sp; - /* 16-byte aligned stack mandatory on AArch64 */ - if (newsp & 15) - return -EINVAL; - return do_fork(clone_flags, newsp, regs, 0, parent_tidptr, child_tidptr); + return do_fork(clone_flags, newsp, current_pt_regs(), 0, + parent_tidptr, child_tidptr); } asmlinkage long sys_mmap(unsigned long addr, unsigned long len, @@ -54,7 +50,6 @@ asmlinkage long sys_mmap(unsigned long addr, unsigned long len, /* * Wrappers to pass the pt_regs argument. */ -#define sys_clone sys_clone_wrapper #define sys_rt_sigreturn sys_rt_sigreturn_wrapper #define sys_sigaltstack sys_sigaltstack_wrapper diff --git a/arch/arm64/kernel/sys32.S b/arch/arm64/kernel/sys32.S index 92145d402cf1..7ef59e9245ef 100644 --- a/arch/arm64/kernel/sys32.S +++ b/arch/arm64/kernel/sys32.S @@ -26,20 +26,6 @@ /* * System call wrappers for the AArch32 compatibility layer. */ -compat_sys_fork_wrapper: - mov x0, sp - b compat_sys_fork -ENDPROC(compat_sys_fork_wrapper) - -compat_sys_vfork_wrapper: - mov x0, sp - b compat_sys_vfork -ENDPROC(compat_sys_vfork_wrapper) - -compat_sys_clone_wrapper: - mov x5, sp - b compat_sys_clone -ENDPROC(compat_sys_clone_wrapper) compat_sys_sigreturn_wrapper: mov x0, sp diff --git a/arch/arm64/kernel/sys_compat.c b/arch/arm64/kernel/sys_compat.c index d140b73a8bc4..6fabc1912da0 100644 --- a/arch/arm64/kernel/sys_compat.c +++ b/arch/arm64/kernel/sys_compat.c @@ -28,25 +28,15 @@ #include <asm/cacheflush.h> #include <asm/unistd32.h> -asmlinkage int compat_sys_fork(struct pt_regs *regs) +asmlinkage int compat_sys_fork(void) { - return do_fork(SIGCHLD, regs->compat_sp, regs, 0, NULL, NULL); + return do_fork(SIGCHLD, 0, current_pt_regs(), 0, NULL, NULL); } -asmlinkage int compat_sys_clone(unsigned long clone_flags, unsigned long newsp, - int __user *parent_tidptr, int tls_val, - int __user *child_tidptr, struct pt_regs *regs) +asmlinkage int compat_sys_vfork(void) { - if (!newsp) - newsp = regs->compat_sp; - - return do_fork(clone_flags, newsp, regs, 0, parent_tidptr, child_tidptr); -} - -asmlinkage int compat_sys_vfork(struct pt_regs *regs) -{ - return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, regs->compat_sp, - regs, 0, NULL, NULL); + return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, 0, + current_pt_regs(), 0, NULL, NULL); } asmlinkage int compat_sys_sched_rr_get_interval(compat_pid_t pid, |