diff options
| -rw-r--r-- | arch/microblaze/Kconfig | 1 | ||||
| -rw-r--r-- | arch/microblaze/include/asm/unistd.h | 5 | ||||
| -rw-r--r-- | arch/microblaze/kernel/entry-nommu.S | 8 | ||||
| -rw-r--r-- | arch/microblaze/kernel/entry.S | 26 | ||||
| -rw-r--r-- | arch/microblaze/kernel/process.c | 8 | ||||
| -rw-r--r-- | arch/microblaze/kernel/sys_microblaze.c | 14 | ||||
| -rw-r--r-- | arch/microblaze/kernel/syscall_table.S | 6 |
7 files changed, 12 insertions, 56 deletions
diff --git a/arch/microblaze/Kconfig b/arch/microblaze/Kconfig index 198abf6d41c4..4bcf89148f3c 100644 --- a/arch/microblaze/Kconfig +++ b/arch/microblaze/Kconfig @@ -28,6 +28,7 @@ config MICROBLAZE select MODULES_USE_ELF_RELA select GENERIC_KERNEL_THREAD select GENERIC_KERNEL_EXECVE + select CLONE_BACKWARDS config SWAP def_bool n diff --git a/arch/microblaze/include/asm/unistd.h b/arch/microblaze/include/asm/unistd.h index ea7442834294..94d978986b75 100644 --- a/arch/microblaze/include/asm/unistd.h +++ b/arch/microblaze/include/asm/unistd.h @@ -423,6 +423,11 @@ #define __ARCH_WANT_SYS_RT_SIGACTION #define __ARCH_WANT_SYS_RT_SIGSUSPEND #define __ARCH_WANT_SYS_EXECVE +#define __ARCH_WANT_SYS_CLONE +#define __ARCH_WANT_SYS_VFORK +#ifdef CONFIG_MMU +#define __ARCH_WANT_SYS_FORK +#endif /* * "Conditional" syscalls diff --git a/arch/microblaze/kernel/entry-nommu.S b/arch/microblaze/kernel/entry-nommu.S index 673a49c04a02..cb0327f204ab 100644 --- a/arch/microblaze/kernel/entry-nommu.S +++ b/arch/microblaze/kernel/entry-nommu.S @@ -559,14 +559,6 @@ no_work_pending: rtid r14, 0 nop -sys_vfork: - brid microblaze_vfork - addk r5, r1, r0 - -sys_clone: - brid microblaze_clone - addk r7, r1, r0 - sys_rt_sigreturn_wrapper: brid sys_rt_sigreturn addk r5, r1, r0 diff --git a/arch/microblaze/kernel/entry.S b/arch/microblaze/kernel/entry.S index 10f360ed82b4..c217367dfc7b 100644 --- a/arch/microblaze/kernel/entry.S +++ b/arch/microblaze/kernel/entry.S @@ -442,18 +442,6 @@ TRAP_return: /* Make global symbol for debugging */ nop; -/* These syscalls need access to the struct pt_regs on the stack, so we - implement them in assembly (they're basically all wrappers anyway). */ - -C_ENTRY(sys_fork_wrapper): - addi r5, r0, SIGCHLD /* Arg 0: flags */ - lwi r6, r1, PT_R1 /* Arg 1: child SP (use parent's) */ - addik r7, r1, 0 /* Arg 2: parent context */ - add r8, r0, r0 /* Arg 3: (unused) */ - add r9, r0, r0; /* Arg 4: (unused) */ - brid do_fork /* Do real work (tail-call) */ - add r10, r0, r0; /* Arg 5: (unused) */ - /* This the initial entry point for a new child thread, with an appropriate stack in place that makes it look the the child is in the middle of an syscall. This function is actually `returned to' from switch_thread @@ -475,20 +463,6 @@ C_ENTRY(ret_from_kernel_thread): brid ret_from_trap add r3, r0, r0 -C_ENTRY(sys_vfork): - brid microblaze_vfork /* Do real work (tail-call) */ - addik r5, r1, 0 - -C_ENTRY(sys_clone): - bnei r6, 1f; /* See if child SP arg (arg 1) is 0. */ - lwi r6, r1, PT_R1; /* If so, use paret's stack ptr */ -1: addik r7, r1, 0; /* Arg 2: parent context */ - lwi r9, r1, PT_R8; /* parent tid. */ - lwi r10, r1, PT_R9; /* child tid. */ - /* do_fork will pick up TLS from regs->r10. */ - brid do_fork /* Do real work (tail-call) */ - add r8, r0, r0; /* Arg 3: (unused) */ - C_ENTRY(sys_rt_sigreturn_wrapper): brid sys_rt_sigreturn /* Do real work */ addik r5, r1, 0; /* add user context as 1st arg */ diff --git a/arch/microblaze/kernel/process.c b/arch/microblaze/kernel/process.c index 29768c3dc358..a5fed8db7263 100644 --- a/arch/microblaze/kernel/process.c +++ b/arch/microblaze/kernel/process.c @@ -13,6 +13,7 @@ #include <linux/pm.h> #include <linux/tick.h> #include <linux/bitops.h> +#include <linux/ptrace.h> #include <asm/pgalloc.h> #include <asm/uaccess.h> /* for USER_DS macros */ #include <asm/cacheflush.h> @@ -120,7 +121,7 @@ void flush_thread(void) int copy_thread(unsigned long clone_flags, unsigned long usp, unsigned long arg, - struct task_struct *p, struct pt_regs *regs) + struct task_struct *p, struct pt_regs *unused) { struct pt_regs *childregs = task_pt_regs(p); struct thread_info *ti = task_thread_info(p); @@ -141,8 +142,9 @@ int copy_thread(unsigned long clone_flags, unsigned long usp, ti->cpu_context.r15 = (unsigned long)ret_from_kernel_thread - 8; return 0; } - *childregs = *regs; - childregs->r1 = usp; + *childregs = *current_pt_regs(); + if (usp) + childregs->r1 = usp; memset(&ti->cpu_context, 0, sizeof(struct cpu_context)); ti->cpu_context.r1 = (unsigned long)childregs; diff --git a/arch/microblaze/kernel/sys_microblaze.c b/arch/microblaze/kernel/sys_microblaze.c index a6a7bae9f5c6..63647c586b43 100644 --- a/arch/microblaze/kernel/sys_microblaze.c +++ b/arch/microblaze/kernel/sys_microblaze.c @@ -34,20 +34,6 @@ #include <asm/syscalls.h> -asmlinkage long microblaze_vfork(struct pt_regs *regs) -{ - return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, regs->r1, - regs, 0, NULL, NULL); -} - -asmlinkage long microblaze_clone(int flags, unsigned long stack, - struct pt_regs *regs) -{ - if (!stack) - stack = regs->r1; - return do_fork(flags, stack, regs, 0, NULL, NULL); -} - asmlinkage long sys_mmap(unsigned long addr, unsigned long len, unsigned long prot, unsigned long flags, unsigned long fd, off_t pgoff) diff --git a/arch/microblaze/kernel/syscall_table.S b/arch/microblaze/kernel/syscall_table.S index 6a2b294ef6dc..ff6431e54680 100644 --- a/arch/microblaze/kernel/syscall_table.S +++ b/arch/microblaze/kernel/syscall_table.S @@ -2,11 +2,7 @@ ENTRY(sys_call_table) .long sys_restart_syscall /* 0 - old "setup()" system call, * used for restarting */ .long sys_exit -#ifdef CONFIG_MMU - .long sys_fork_wrapper -#else - .long sys_ni_syscall -#endif + .long sys_fork .long sys_read .long sys_write .long sys_open /* 5 */ |