diff options
Diffstat (limited to 'arch/frv')
| -rw-r--r-- | arch/frv/Makefile | 2 | ||||
| -rw-r--r-- | arch/frv/include/asm/kvm_para.h | 1 | ||||
| -rw-r--r-- | arch/frv/include/asm/posix_types.h | 3 | ||||
| -rw-r--r-- | arch/frv/include/asm/processor.h | 3 | ||||
| -rw-r--r-- | arch/frv/include/asm/thread_info.h | 31 | ||||
| -rw-r--r-- | arch/frv/kernel/Makefile | 2 | ||||
| -rw-r--r-- | arch/frv/kernel/entry.S | 29 | ||||
| -rw-r--r-- | arch/frv/kernel/init_task.c | 32 | ||||
| -rw-r--r-- | arch/frv/kernel/process.c | 26 | ||||
| -rw-r--r-- | arch/frv/kernel/signal.c | 102 |
10 files changed, 49 insertions, 182 deletions
diff --git a/arch/frv/Makefile b/arch/frv/Makefile index 7ff84575b18..4d1b1e9baef 100644 --- a/arch/frv/Makefile +++ b/arch/frv/Makefile @@ -81,7 +81,7 @@ ifdef CONFIG_DEBUG_INFO KBUILD_AFLAGS += -Wa,--gdwarf2 endif -head-y := arch/frv/kernel/head.o arch/frv/kernel/init_task.o +head-y := arch/frv/kernel/head.o core-y += arch/frv/kernel/ arch/frv/mm/ libs-y += arch/frv/lib/ diff --git a/arch/frv/include/asm/kvm_para.h b/arch/frv/include/asm/kvm_para.h new file mode 100644 index 00000000000..14fab8f0b95 --- /dev/null +++ b/arch/frv/include/asm/kvm_para.h @@ -0,0 +1 @@ +#include <asm-generic/kvm_para.h> diff --git a/arch/frv/include/asm/posix_types.h b/arch/frv/include/asm/posix_types.h index 3f34cb45fbb..fe512af74a5 100644 --- a/arch/frv/include/asm/posix_types.h +++ b/arch/frv/include/asm/posix_types.h @@ -10,9 +10,6 @@ typedef unsigned short __kernel_mode_t; #define __kernel_mode_t __kernel_mode_t -typedef unsigned short __kernel_nlink_t; -#define __kernel_nlink_t __kernel_nlink_t - typedef unsigned short __kernel_ipc_pid_t; #define __kernel_ipc_pid_t __kernel_ipc_pid_t diff --git a/arch/frv/include/asm/processor.h b/arch/frv/include/asm/processor.h index 9b1a92b73f6..dccb9d16231 100644 --- a/arch/frv/include/asm/processor.h +++ b/arch/frv/include/asm/processor.h @@ -54,7 +54,6 @@ extern struct cpuinfo_frv __nongprelbss boot_cpu_data; * Bus types */ #define EISA_bus 0 -#define MCA_bus 0 struct thread_struct { struct pt_regs *frame; /* [GR28] exception frame ptr for this thread */ @@ -103,8 +102,6 @@ do { \ __frame->sp = (_usp); \ } while(0) -extern void prepare_to_copy(struct task_struct *tsk); - /* Free all resources held by a thread. */ static inline void release_thread(struct task_struct *dead_task) { diff --git a/arch/frv/include/asm/thread_info.h b/arch/frv/include/asm/thread_info.h index 92d83ea99ae..0ff03a33c81 100644 --- a/arch/frv/include/asm/thread_info.h +++ b/arch/frv/include/asm/thread_info.h @@ -21,8 +21,6 @@ #define THREAD_SIZE 8192 -#define __HAVE_ARCH_TASK_STRUCT_ALLOCATOR - /* * low level task data that entry.S needs immediate access to * - this struct should fit entirely inside of one cache line @@ -82,19 +80,6 @@ register struct thread_info *__current_thread_info asm("gr15"); #define current_thread_info() ({ __current_thread_info; }) -#define __HAVE_ARCH_THREAD_INFO_ALLOCATOR - -/* thread information allocation */ -#ifdef CONFIG_DEBUG_STACK_USAGE -#define alloc_thread_info_node(tsk, node) \ - kzalloc_node(THREAD_SIZE, GFP_KERNEL, node) -#else -#define alloc_thread_info_node(tsk, node) \ - kmalloc_node(THREAD_SIZE, GFP_KERNEL, node) -#endif - -#define free_thread_info(info) kfree(info) - #endif /* __ASSEMBLY__ */ /* @@ -109,8 +94,8 @@ register struct thread_info *__current_thread_info asm("gr15"); #define TIF_NEED_RESCHED 3 /* rescheduling necessary */ #define TIF_SINGLESTEP 4 /* restore singlestep on return to user mode */ #define TIF_RESTORE_SIGMASK 5 /* restore signal mask in do_signal() */ -#define TIF_POLLING_NRFLAG 16 /* true if poll_idle() is polling TIF_NEED_RESCHED */ -#define TIF_MEMDIE 17 /* is terminating due to OOM killer */ +#define TIF_POLLING_NRFLAG 6 /* true if poll_idle() is polling TIF_NEED_RESCHED */ +#define TIF_MEMDIE 7 /* is terminating due to OOM killer */ #define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE) #define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME) @@ -120,8 +105,16 @@ register struct thread_info *__current_thread_info asm("gr15"); #define _TIF_RESTORE_SIGMASK (1 << TIF_RESTORE_SIGMASK) #define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG) -#define _TIF_WORK_MASK 0x0000FFFE /* work to do on interrupt/exception return */ -#define _TIF_ALLWORK_MASK 0x0000FFFF /* work to do on any return to u-space */ +/* work to do on interrupt/exception return */ +#define _TIF_WORK_MASK \ + (_TIF_NOTIFY_RESUME | _TIF_SIGPENDING | _TIF_NEED_RESCHED | _TIF_SINGLESTEP) + +/* work to do on any return to u-space */ +#define _TIF_ALLWORK_MASK (_TIF_WORK_MASK | _TIF_SYSCALL_TRACE) + +#if _TIF_ALLWORK_MASK >= 0x2000 +#error "_TIF_ALLWORK_MASK won't fit in an ANDI now (see entry.S)" +#endif /* * Thread-synchronous status. diff --git a/arch/frv/kernel/Makefile b/arch/frv/kernel/Makefile index c36f70b6699..ad4087b6996 100644 --- a/arch/frv/kernel/Makefile +++ b/arch/frv/kernel/Makefile @@ -5,7 +5,7 @@ heads-y := head-uc-fr401.o head-uc-fr451.o head-uc-fr555.o heads-$(CONFIG_MMU) := head-mmu-fr451.o -extra-y:= head.o init_task.o vmlinux.lds +extra-y:= head.o vmlinux.lds obj-y := $(heads-y) entry.o entry-table.o break.o switch_to.o kernel_thread.o \ kernel_execve.o process.o traps.o ptrace.o signal.o dma.o \ diff --git a/arch/frv/kernel/entry.S b/arch/frv/kernel/entry.S index 5ba23f715ea..7d5e000fd32 100644 --- a/arch/frv/kernel/entry.S +++ b/arch/frv/kernel/entry.S @@ -905,18 +905,19 @@ __syscall_call: __syscall_exit: LEDS 0x6300 - sti gr8,@(gr28,#REG_GR(8)) ; save return value + # keep current PSR in GR23 + movsg psr,gr23 - # rebuild saved psr - execve will change it for init/main.c ldi @(gr28,#REG_PSR),gr22 + + sti.p gr8,@(gr28,#REG_GR(8)) ; save return value + + # rebuild saved psr - execve will change it for init/main.c srli gr22,#1,gr5 andi.p gr22,#~PSR_PS,gr22 andi gr5,#PSR_PS,gr5 or gr5,gr22,gr22 - ori gr22,#PSR_S,gr22 - - # keep current PSR in GR23 - movsg psr,gr23 + ori.p gr22,#PSR_S,gr22 # make sure we don't miss an interrupt setting need_resched or sigpending between # sampling and the RETT @@ -924,9 +925,7 @@ __syscall_exit: movgs gr23,psr ldi @(gr15,#TI_FLAGS),gr4 - sethi.p %hi(_TIF_ALLWORK_MASK),gr5 - setlo %lo(_TIF_ALLWORK_MASK),gr5 - andcc gr4,gr5,gr0,icc0 + andicc gr4,#_TIF_ALLWORK_MASK,gr0,icc0 bne icc0,#0,__syscall_exit_work # restore all registers and return @@ -1111,9 +1110,7 @@ __entry_resume_userspace: __entry_return_from_user_interrupt: LEDS 0x6402 ldi @(gr15,#TI_FLAGS),gr4 - sethi.p %hi(_TIF_WORK_MASK),gr5 - setlo %lo(_TIF_WORK_MASK),gr5 - andcc gr4,gr5,gr0,icc0 + andicc gr4,#_TIF_WORK_MASK,gr0,icc0 beq icc0,#1,__entry_return_direct __entry_work_pending: @@ -1133,9 +1130,7 @@ __entry_work_resched: LEDS 0x6401 ldi @(gr15,#TI_FLAGS),gr4 - sethi.p %hi(_TIF_WORK_MASK),gr5 - setlo %lo(_TIF_WORK_MASK),gr5 - andcc gr4,gr5,gr0,icc0 + andicc gr4,#_TIF_WORK_MASK,gr0,icc0 beq icc0,#1,__entry_return_direct andicc gr4,#_TIF_NEED_RESCHED,gr0,icc0 bne icc0,#1,__entry_work_resched @@ -1163,7 +1158,9 @@ __syscall_trace_entry: # perform syscall exit tracing __syscall_exit_work: LEDS 0x6340 - andicc gr4,#_TIF_SYSCALL_TRACE,gr0,icc0 + andicc gr22,#PSR_PS,gr0,icc1 ; don't handle on return to kernel mode + andicc.p gr4,#_TIF_SYSCALL_TRACE,gr0,icc0 + bne icc1,#0,__entry_return_direct beq icc0,#1,__entry_work_pending movsg psr,gr23 diff --git a/arch/frv/kernel/init_task.c b/arch/frv/kernel/init_task.c deleted file mode 100644 index 3c3e0b336a9..00000000000 --- a/arch/frv/kernel/init_task.c +++ /dev/null @@ -1,32 +0,0 @@ -#include <linux/mm.h> -#include <linux/module.h> -#include <linux/sched.h> -#include <linux/init.h> -#include <linux/init_task.h> -#include <linux/fs.h> -#include <linux/mqueue.h> - -#include <asm/uaccess.h> -#include <asm/pgtable.h> - - -static struct signal_struct init_signals = INIT_SIGNALS(init_signals); -static struct sighand_struct init_sighand = INIT_SIGHAND(init_sighand); -/* - * Initial thread structure. - * - * We need to make sure that this is THREAD_SIZE aligned due to the - * way process stacks are handled. This is done by having a special - * "init_task" linker map entry.. - */ -union thread_union init_thread_union __init_task_data = - { INIT_THREAD_INFO(init_task) }; - -/* - * Initial task structure. - * - * All other task structs will be allocated on slabs in fork.c - */ -struct task_struct init_task = INIT_TASK(init_task); - -EXPORT_SYMBOL(init_task); diff --git a/arch/frv/kernel/process.c b/arch/frv/kernel/process.c index d4de48bd5ef..ff95f50efea 100644 --- a/arch/frv/kernel/process.c +++ b/arch/frv/kernel/process.c @@ -43,21 +43,6 @@ asmlinkage void ret_from_fork(void); void (*pm_power_off)(void); EXPORT_SYMBOL(pm_power_off); -struct task_struct *alloc_task_struct_node(int node) -{ - struct task_struct *p = kmalloc_node(THREAD_SIZE, GFP_KERNEL, node); - - if (p) - atomic_set((atomic_t *)(p+1), 1); - return p; -} - -void free_task_struct(struct task_struct *p) -{ - if (atomic_dec_and_test((atomic_t *)(p+1))) - kfree(p); -} - static void core_sleep_idle(void) { #ifdef LED_DEBUG_SLEEP @@ -180,17 +165,6 @@ asmlinkage int sys_clone(unsigned long clone_flags, unsigned long newsp, return do_fork(clone_flags, newsp, __frame, 0, parent_tidptr, child_tidptr); } /* end sys_clone() */ -/*****************************************************************************/ -/* - * This gets called before we allocate a new thread and copy - * the current task into it. - */ -void prepare_to_copy(struct task_struct *tsk) -{ - //unlazy_fpu(tsk); -} /* end prepare_to_copy() */ - -/*****************************************************************************/ /* * set up the kernel stack and exception frames for a new process */ diff --git a/arch/frv/kernel/signal.c b/arch/frv/kernel/signal.c index bab01298b58..864c2f0d497 100644 --- a/arch/frv/kernel/signal.c +++ b/arch/frv/kernel/signal.c @@ -28,8 +28,6 @@ #define DEBUG_SIG 0 -#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP))) - struct fdpic_func_descriptor { unsigned long text; unsigned long GOT; @@ -40,17 +38,9 @@ struct fdpic_func_descriptor { */ asmlinkage int sys_sigsuspend(int history0, int history1, old_sigset_t mask) { - mask &= _BLOCKABLE; - spin_lock_irq(¤t->sighand->siglock); - current->saved_sigmask = current->blocked; - siginitset(¤t->blocked, mask); - recalc_sigpending(); - spin_unlock_irq(¤t->sighand->siglock); - - current->state = TASK_INTERRUPTIBLE; - schedule(); - set_thread_flag(TIF_RESTORE_SIGMASK); - return -ERESTARTNOHAND; + sigset_t blocked; + siginitset(&blocked, mask); + return sigsuspend(&blocked); } asmlinkage int sys_sigaction(int sig, @@ -64,10 +54,10 @@ asmlinkage int sys_sigaction(int sig, old_sigset_t mask; if (!access_ok(VERIFY_READ, act, sizeof(*act)) || __get_user(new_ka.sa.sa_handler, &act->sa_handler) || - __get_user(new_ka.sa.sa_restorer, &act->sa_restorer)) + __get_user(new_ka.sa.sa_restorer, &act->sa_restorer) || + __get_user(new_ka.sa.sa_flags, &act->sa_flags) || + __get_user(mask, &act->sa_mask)) return -EFAULT; - __get_user(new_ka.sa.sa_flags, &act->sa_flags); - __get_user(mask, &act->sa_mask); siginitset(&new_ka.sa.sa_mask, mask); } @@ -76,10 +66,10 @@ asmlinkage int sys_sigaction(int sig, if (!ret && oact) { if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) || __put_user(old_ka.sa.sa_handler, &oact->sa_handler) || - __put_user(old_ka.sa.sa_restorer, &oact->sa_restorer)) + __put_user(old_ka.sa.sa_restorer, &oact->sa_restorer) || + __put_user(old_ka.sa.sa_flags, &oact->sa_flags) || + __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask)) return -EFAULT; - __put_user(old_ka.sa.sa_flags, &oact->sa_flags); - __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask); } return ret; @@ -157,11 +147,7 @@ asmlinkage int sys_sigreturn(void) __copy_from_user(&set.sig[1], &frame->extramask, sizeof(frame->extramask))) goto badframe; - sigdelsetmask(&set, ~_BLOCKABLE); - spin_lock_irq(¤t->sighand->siglock); - current->blocked = set; - recalc_sigpending(); - spin_unlock_irq(¤t->sighand->siglock); + set_current_blocked(&set); if (restore_sigcontext(&frame->sc, &gr8)) goto badframe; @@ -183,11 +169,7 @@ asmlinkage int sys_rt_sigreturn(void) if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set))) goto badframe; - sigdelsetmask(&set, ~_BLOCKABLE); - spin_lock_irq(¤t->sighand->siglock); - current->blocked = set; - recalc_sigpending(); - spin_unlock_irq(¤t->sighand->siglock); + set_current_blocked(&set); if (restore_sigcontext(&frame->uc.uc_mcontext, &gr8)) goto badframe; @@ -440,9 +422,10 @@ give_sigsegv: /* * OK, we're invoking a handler */ -static int handle_signal(unsigned long sig, siginfo_t *info, - struct k_sigaction *ka, sigset_t *oldset) +static void handle_signal(unsigned long sig, siginfo_t *info, + struct k_sigaction *ka) { + sigset_t *oldset = sigmask_to_save(); int ret; /* Are we from a system call? */ @@ -474,18 +457,11 @@ static int handle_signal(unsigned long sig, siginfo_t *info, else ret = setup_frame(sig, ka, oldset); - if (ret == 0) { - spin_lock_irq(¤t->sighand->siglock); - sigorsets(¤t->blocked, ¤t->blocked, - &ka->sa.sa_mask); - if (!(ka->sa.sa_flags & SA_NODEFER)) - sigaddset(¤t->blocked, sig); - recalc_sigpending(); - spin_unlock_irq(¤t->sighand->siglock); - } - - return ret; + if (ret) + return; + signal_delivered(sig, info, ka, __frame, + test_thread_flag(TIF_SINGLESTEP)); } /* end handle_signal() */ /*****************************************************************************/ @@ -498,44 +474,14 @@ static void do_signal(void) { struct k_sigaction ka; siginfo_t info; - sigset_t *oldset; int signr; - /* - * We want the common case to go fast, which - * is why we may in certain cases get here from - * kernel mode. Just return without doing anything - * if so. - */ - if (!user_mode(__frame)) - return; - - if (try_to_freeze()) - goto no_signal; - - if (test_thread_flag(TIF_RESTORE_SIGMASK)) - oldset = ¤t->saved_sigmask; - else - oldset = ¤t->blocked; - signr = get_signal_to_deliver(&info, &ka, __frame, NULL); if (signr > 0) { - if (handle_signal(signr, &info, &ka, oldset) == 0) { - /* a signal was successfully delivered; the saved - * sigmask will have been stored in the signal frame, - * and will be restored by sigreturn, so we can simply - * clear the TIF_RESTORE_SIGMASK flag */ - if (test_thread_flag(TIF_RESTORE_SIGMASK)) - clear_thread_flag(TIF_RESTORE_SIGMASK); - - tracehook_signal_handler(signr, &info, &ka, __frame, - test_thread_flag(TIF_SINGLESTEP)); - } - + handle_signal(signr, &info, &ka); return; } -no_signal: /* Did we come from a system call? */ if (__frame->syscallno != -1) { /* Restart the system call - no handlers present */ @@ -557,11 +503,7 @@ no_signal: /* if there's no signal to deliver, we just put the saved sigmask * back */ - if (test_thread_flag(TIF_RESTORE_SIGMASK)) { - clear_thread_flag(TIF_RESTORE_SIGMASK); - sigprocmask(SIG_SETMASK, ¤t->saved_sigmask, NULL); - } - + restore_saved_sigmask(); } /* end do_signal() */ /*****************************************************************************/ @@ -576,15 +518,13 @@ asmlinkage void do_notify_resume(__u32 thread_info_flags) clear_thread_flag(TIF_SINGLESTEP); /* deal with pending signal delivery */ - if (thread_info_flags & (_TIF_SIGPENDING | _TIF_RESTORE_SIGMASK)) + if (thread_info_flags & _TIF_SIGPENDING) do_signal(); /* deal with notification on about to resume userspace execution */ if (thread_info_flags & _TIF_NOTIFY_RESUME) { clear_thread_flag(TIF_NOTIFY_RESUME); tracehook_notify_resume(__frame); - if (current->replacement_session_keyring) - key_replace_session_keyring(); } } /* end do_notify_resume() */ |