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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal 

Pull pile 2 of execve and kernel_thread unification work from Al Viro:
 "Stuff in there: kernel_thread/kernel_execve/sys_execve conversions for
  several more architectures plus assorted signal fixes and cleanups.

  There'll be more (in particular, real fixes for the alpha
  do_notify_resume() irq mess)..."

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal: (43 commits)
  alpha: don't open-code trace_report_syscall_{enter,exit}
  Uninclude linux/freezer.h
  m32r: trim masks
  avr32: trim masks
  tile: don't bother with SIGTRAP in setup_frame
  microblaze: don't bother with SIGTRAP in setup_rt_frame()
  mn10300: don't bother with SIGTRAP in setup_frame()
  frv: no need to raise SIGTRAP in setup_frame()
  x86: get rid of duplicate code in case of CONFIG_VM86
  unicore32: remove pointless test
  h8300: trim _TIF_WORK_MASK
  parisc: decide whether to go to slow path (tracesys) based on thread flags
  parisc: don't bother looping in do_signal()
  parisc: fix double restarts
  bury the rest of TIF_IRET
  sanitize tsk_is_polling()
  bury _TIF_RESTORE_SIGMASK
  unicore32: unobfuscate _TIF_WORK_MASK
  mips: NOTIFY_RESUME is not needed in TIF masks
  mips: merge the identical "return from syscall" per-ABI code
  ...

Conflicts:
	arch/arm/include/asm/thread_info.h
This commit is contained in:
Linus Torvalds 2012-10-12 10:49:08 +09:00
parent 40924754f2 12f79be93d
commit 8213a2f3ee
99 changed files with 351 additions and 889 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
arch/alpha/include/asm/thread_info.h
View File

@ -84,7 +84,6 @@ register struct thread_info *__current_thread_info __asm__("$8");
#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
#define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
#define _TIF_RESTORE_SIGMASK (1<<TIF_RESTORE_SIGMASK)
#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
/* Work to do on interrupt/exception return. */
@ -117,5 +116,7 @@ register struct thread_info *__current_thread_info __asm__("$8");
(int __user *)(value)); \
})
#define tsk_is_polling(t) test_tsk_thread_flag(t, TIF_POLLING_NRFLAG)
#endif /* __KERNEL__ */
#endif /* _ALPHA_THREAD_INFO_H */

13
arch/alpha/kernel/entry.S
View File

@ -418,11 +418,10 @@ $work_notifysig:
strace:
/* set up signal stack, call syscall_trace */
bsr $1, do_switch_stack
jsr $26, syscall_trace
jsr $26, syscall_trace_enter /* returns the syscall number */
bsr $1, undo_switch_stack
/* get the system call number and the arguments back.. */
ldq $0, 0($sp)
/* get the arguments back.. */
ldq $16, SP_OFF+24($sp)
ldq $17, SP_OFF+32($sp)
ldq $18, SP_OFF+40($sp)
@ -449,7 +448,7 @@ $strace_success:
stq $0, 0($sp) /* save return value */
bsr $1, do_switch_stack
jsr $26, syscall_trace
jsr $26, syscall_trace_leave
bsr $1, undo_switch_stack
br $31, ret_from_sys_call
@ -467,7 +466,7 @@ $strace_error:
bsr $1, do_switch_stack
mov $19, $9 /* save old syscall number */
mov $20, $10 /* save old a3 */
jsr $26, syscall_trace
jsr $26, syscall_trace_leave
mov $9, $19
mov $10, $20
bsr $1, undo_switch_stack
@ -698,7 +697,7 @@ sys_sigreturn:
lda $sp, -SWITCH_STACK_SIZE($sp)
jsr $26, do_sigreturn
bne $9, 1f
jsr $26, syscall_trace
jsr $26, syscall_trace_leave
1: br $1, undo_switch_stack
br ret_from_sys_call
.end sys_sigreturn
@ -715,7 +714,7 @@ sys_rt_sigreturn:
lda $sp, -SWITCH_STACK_SIZE($sp)
jsr $26, do_rt_sigreturn
bne $9, 1f
jsr $26, syscall_trace
jsr $26, syscall_trace_leave
1: br $1, undo_switch_stack
br ret_from_sys_call
.end sys_rt_sigreturn

34
arch/alpha/kernel/ptrace.c
View File

@ -13,6 +13,7 @@
#include <linux/user.h>
#include <linux/security.h>
#include <linux/signal.h>
#include <linux/tracehook.h>
#include <asm/uaccess.h>
#include <asm/pgtable.h>
@ -312,25 +313,18 @@ long arch_ptrace(struct task_struct *child, long request,
return ret;
}
asmlinkage void
syscall_trace(void)
asmlinkage unsigned long syscall_trace_enter(void)
{
if (!test_thread_flag(TIF_SYSCALL_TRACE))
return;
if (!(current->ptrace & PT_PTRACED))
return;
/* The 0x80 provides a way for the tracing parent to distinguish
between a syscall stop and SIGTRAP delivery */
ptrace_notify(SIGTRAP | ((current->ptrace & PT_TRACESYSGOOD)
? 0x80 : 0));
/*
* This isn't the same as continuing with a signal, but it will do
* for normal use. strace only continues with a signal if the
* stopping signal is not SIGTRAP. -brl
*/
if (current->exit_code) {
send_sig(current->exit_code, current, 1);
current->exit_code = 0;
}
unsigned long ret = 0;
if (test_thread_flag(TIF_SYSCALL_TRACE) &&
tracehook_report_syscall_entry(current_pt_regs()))
ret = -1UL;
return ret ?: current_pt_regs()->r0;
}
asmlinkage void
syscall_trace_leave(void)
{
if (test_thread_flag(TIF_SYSCALL_TRACE))
tracehook_report_syscall_exit(current_pt_regs(), 0);
}

2
arch/arm/include/asm/thread_info.h
View File

@ -151,7 +151,6 @@ extern int vfp_restore_user_hwstate(struct user_vfp __user *,
#define TIF_SYSCALL_TRACE 8
#define TIF_SYSCALL_AUDIT 9
#define TIF_SYSCALL_TRACEPOINT 10
#define TIF_POLLING_NRFLAG 16
#define TIF_USING_IWMMXT 17
#define TIF_MEMDIE 18 /* is terminating due to OOM killer */
#define TIF_RESTORE_SIGMASK 20
@ -164,7 +163,6 @@ extern int vfp_restore_user_hwstate(struct user_vfp __user *,
#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
#define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT)
#define _TIF_SYSCALL_TRACEPOINT (1 << TIF_SYSCALL_TRACEPOINT)
#define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG)
#define _TIF_USING_IWMMXT (1 << TIF_USING_IWMMXT)
#define _TIF_SECCOMP (1 << TIF_SECCOMP)

1
arch/arm/kernel/signal.c
View File

@ -10,7 +10,6 @@
#include <linux/errno.h>
#include <linux/signal.h>
#include <linux/personality.h>
#include <linux/freezer.h>
#include <linux/uaccess.h>
#include <linux/tracehook.h>

18
arch/avr32/include/asm/thread_info.h
View File

@ -77,8 +77,6 @@ static inline struct thread_info *current_thread_info(void)
#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
#define TIF_SIGPENDING 1 /* signal pending */
#define TIF_NEED_RESCHED 2 /* rescheduling necessary */
#define TIF_POLLING_NRFLAG 3 /* true if poll_idle() is polling
TIF_NEED_RESCHED */
#define TIF_BREAKPOINT 4 /* enter monitor mode on return */
#define TIF_SINGLE_STEP 5 /* single step in progress */
#define TIF_MEMDIE 6 /* is terminating due to OOM killer */
@ -91,10 +89,9 @@ static inline struct thread_info *current_thread_info(void)
#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
#define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG)
#define _TIF_BREAKPOINT (1 << TIF_BREAKPOINT)
#define _TIF_SINGLE_STEP (1 << TIF_SINGLE_STEP)
#define _TIF_MEMDIE (1 << TIF_MEMDIE)
#define _TIF_RESTORE_SIGMASK (1 << TIF_RESTORE_SIGMASK)
#define _TIF_CPU_GOING_TO_SLEEP (1 << TIF_CPU_GOING_TO_SLEEP)
#define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME)
@ -102,17 +99,14 @@ static inline struct thread_info *current_thread_info(void)
/* work to do on interrupt/exception return */
#define _TIF_WORK_MASK \
((1 << TIF_SIGPENDING) \
(_TIF_SIGPENDING \
| _TIF_NOTIFY_RESUME \
| (1 << TIF_NEED_RESCHED) \
| (1 << TIF_POLLING_NRFLAG) \
| (1 << TIF_BREAKPOINT) \
| (1 << TIF_RESTORE_SIGMASK))
| _TIF_NEED_RESCHED \
| _TIF_BREAKPOINT)
/* work to do on any return to userspace */
#define _TIF_ALLWORK_MASK (_TIF_WORK_MASK | (1 << TIF_SYSCALL_TRACE) | \
_TIF_NOTIFY_RESUME)
#define _TIF_ALLWORK_MASK (_TIF_WORK_MASK | _TIF_SYSCALL_TRACE)
/* work to do on return from debug mode */
#define _TIF_DBGWORK_MASK (_TIF_WORK_MASK & ~(1 << TIF_BREAKPOINT))
#define _TIF_DBGWORK_MASK (_TIF_WORK_MASK & ~_TIF_BREAKPOINT)
#endif /* __ASM_AVR32_THREAD_INFO_H */

1
arch/avr32/kernel/signal.c
View File

@ -15,7 +15,6 @@
#include <linux/errno.h>
#include <linux/ptrace.h>
#include <linux/unistd.h>
#include <linux/freezer.h>
#include <linux/tracehook.h>
#include <asm/uaccess.h>

4
arch/blackfin/include/asm/thread_info.h
View File

@ -96,8 +96,6 @@ static inline struct thread_info *current_thread_info(void)
#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
#define TIF_SIGPENDING 1 /* signal pending */
#define TIF_NEED_RESCHED 2 /* rescheduling necessary */
#define TIF_POLLING_NRFLAG 3 /* true if poll_idle() is polling
TIF_NEED_RESCHED */
#define TIF_MEMDIE 4 /* is terminating due to OOM killer */
#define TIF_RESTORE_SIGMASK 5 /* restore signal mask in do_signal() */
#define TIF_IRQ_SYNC 7 /* sync pipeline stage */
@ -108,8 +106,6 @@ static inline struct thread_info *current_thread_info(void)
#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
#define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
#define _TIF_RESTORE_SIGMASK (1<<TIF_RESTORE_SIGMASK)
#define _TIF_IRQ_SYNC (1<<TIF_IRQ_SYNC)
#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
#define _TIF_SINGLESTEP (1<<TIF_SINGLESTEP)

1
arch/blackfin/kernel/signal.c
View File

@ -10,7 +10,6 @@
#include <linux/tty.h>
#include <linux/personality.h>
#include <linux/binfmts.h>
#include <linux/freezer.h>
#include <linux/uaccess.h>
#include <linux/tracehook.h>

1
arch/c6x/Kconfig
View File

@ -17,6 +17,7 @@ config C6X
select OF
select OF_EARLY_FLATTREE
select GENERIC_CLOCKEVENTS
select GENERIC_KERNEL_THREAD
config MMU
def_bool n

2
arch/c6x/include/asm/processor.h
View File

@ -92,8 +92,6 @@ static inline void release_thread(struct task_struct *dead_task)
{
}
extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
#define copy_segments(tsk, mm) do { } while (0)
#define release_segments(mm) do { } while (0)

5
arch/c6x/include/asm/syscalls.h
View File

@ -44,11 +44,6 @@ extern int sys_cache_sync(unsigned long s, unsigned long e);
struct pt_regs;
extern asmlinkage long sys_c6x_clone(struct pt_regs *regs);
extern asmlinkage long sys_c6x_execve(const char __user *name,
const char __user *const __user *argv,
const char __user *const __user *envp,
struct pt_regs *regs);
#include <asm-generic/syscalls.h>

1
arch/c6x/include/asm/thread_info.h
View File

@ -97,7 +97,6 @@ struct thread_info *current_thread_info(void)
#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
#define TIF_RESTORE_SIGMASK 4 /* restore signal mask in do_signal() */
#define TIF_POLLING_NRFLAG 16 /* true if polling TIF_NEED_RESCHED */
#define TIF_MEMDIE 17 /* OOM killer killed process */
#define TIF_WORK_MASK 0x00007FFE /* work on irq/exception return */

3
arch/c6x/include/asm/unistd.h
View File

@ -14,6 +14,9 @@
* more details.
*/
#define __ARCH_WANT_KERNEL_EXECVE
#define __ARCH_WANT_SYS_EXECVE
/* Use the standard ABI for syscalls. */
#include <asm-generic/unistd.h>

1
arch/c6x/kernel/asm-offsets.c
View File

@ -116,7 +116,6 @@ void foo(void)
DEFINE(_TIF_NOTIFY_RESUME, (1<<TIF_NOTIFY_RESUME));
DEFINE(_TIF_SIGPENDING, (1<<TIF_SIGPENDING));
DEFINE(_TIF_NEED_RESCHED, (1<<TIF_NEED_RESCHED));
DEFINE(_TIF_POLLING_NRFLAG, (1<<TIF_POLLING_NRFLAG));
DEFINE(_TIF_ALLWORK_MASK, TIF_ALLWORK_MASK);
DEFINE(_TIF_WORK_MASK, TIF_WORK_MASK);

56
arch/c6x/kernel/entry.S
View File

@ -400,6 +400,32 @@ ret_from_fork_2:
STW .D2T2 B0,*+SP(REGS_A4+8)
ENDPROC(ret_from_fork)
ENTRY(ret_from_kernel_thread)
#ifdef CONFIG_C6X_BIG_KERNEL
MVKL .S1 schedule_tail,A0
MVKH .S1 schedule_tail,A0
B .S2X A0
#else
B .S2 schedule_tail
#endif
LDW .D2T2 *+SP(REGS_A0+8),B10 /* get fn */
ADDKPC .S2 0f,B3,3
0:
B .S2 B10 /* call fn */
LDW .D2T1 *+SP(REGS_A1+8),A4 /* get arg */
MVKL .S2 sys_exit,B11
MVKH .S2 sys_exit,B11
ADDKPC .S2 0f,B3,1
0:
BNOP .S2 B11,5 /* jump to sys_exit */
ENDPROC(ret_from_kernel_thread)
ENTRY(ret_from_kernel_execve)
GET_THREAD_INFO A12
BNOP .S2 syscall_exit,4
ADD .D2X A4,-8,SP
ENDPROC(ret_from_kernel_execve)
;;
;; These are the interrupt handlers, responsible for calling __do_IRQ()
;; int6 is used for syscalls (see _system_call entry)
@ -593,13 +619,6 @@ ENTRY(sys_sigaltstack)
NOP 4
ENDPROC(sys_sigaltstack)
;; kernel_execve
ENTRY(kernel_execve)
MVK .S2 __NR_execve,B0
SWE
BNOP .S2 B3,5
ENDPROC(kernel_execve)
;;
;; Special system calls
;; return address is in B3
@ -628,29 +647,6 @@ ENTRY(sys_rt_sigreturn)
#endif
ENDPROC(sys_rt_sigreturn)
ENTRY(sys_execve)
ADDAW .D2 SP,2,B6 ; put regs addr in 4th parameter
; & adjust regs stack addr
LDW .D2T2 *+SP(REGS_B4+8),B4
;; c6x_execve(char *name, char **argv,
;; char **envp, struct pt_regs *regs)
#ifdef CONFIG_C6X_BIG_KERNEL
|| MVKL .S1 sys_c6x_execve,A0
MVKH .S1 sys_c6x_execve,A0
B .S2X A0
#else
|| B .S2 sys_c6x_execve
#endif
STW .D2T2 B3,*SP--[2]
ADDKPC .S2 ret_from_c6x_execve,B3,3
ret_from_c6x_execve:
LDW .D2T2 *++SP[2],B3
NOP 4
BNOP .S2 B3,5
ENDPROC(sys_execve)
ENTRY(sys_pread_c6x)
MV .D2X A8,B7
#ifdef CONFIG_C6X_BIG_KERNEL

72
arch/c6x/kernel/process.c
View File

@ -25,6 +25,7 @@ void (*c6x_restart)(void);
void (*c6x_halt)(void);
extern asmlinkage void ret_from_fork(void);
extern asmlinkage void ret_from_kernel_thread(void);
/*
* power off function, if any
@ -103,37 +104,6 @@ void machine_power_off(void)
halt_loop();
}
static void kernel_thread_helper(int dummy, void *arg, int (*fn)(void *))
{
do_exit(fn(arg));
}
/*
* Create a kernel thread
*/
int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags)
{
struct pt_regs regs;
/*
* copy_thread sets a4 to zero (child return from fork)
* so we can't just set things up to directly return to
* fn.
*/
memset(&regs, 0, sizeof(regs));
regs.b4 = (unsigned long) arg;
regs.a6 = (unsigned long) fn;
regs.pc = (unsigned long) kernel_thread_helper;
local_save_flags(regs.csr);
regs.csr |= 1;
regs.tsr = 5; /* Set GEE and GIE in TSR */
/* Ok, create the new process.. */
return do_fork(flags | CLONE_VM | CLONE_UNTRACED, -1, &regs,
0, NULL, NULL);
}
EXPORT_SYMBOL(kernel_thread);
void flush_thread(void)
{
}
@ -191,22 +161,24 @@ int copy_thread(unsigned long clone_flags, unsigned long usp,
childregs = task_pt_regs(p);
*childregs = *regs;
childregs->a4 = 0;
if (usp == -1)
if (!regs) {
/* case of __kernel_thread: we return to supervisor space */
memset(childregs, 0, sizeof(struct pt_regs));
childregs->sp = (unsigned long)(childregs + 1);
else
p->thread.pc = (unsigned long) ret_from_kernel_thread;
childregs->a0 = usp; /* function */
childregs->a1 = ustk_size; /* argument */
} else {
/* Otherwise use the given stack */
*childregs = *regs;
childregs->sp = usp;
p->thread.pc = (unsigned long) ret_from_fork;
}
/* Set usp/ksp */
p->thread.usp = childregs->sp;
/* switch_to uses stack to save/restore 14 callee-saved regs */
thread_saved_ksp(p) = (unsigned long)childregs - 8;
p->thread.pc = (unsigned int) ret_from_fork;
p->thread.wchan = (unsigned long) ret_from_fork;
p->thread.wchan = p->thread.pc;
#ifdef __DSBT__
{
unsigned long dp;
@ -221,28 +193,6 @@ int copy_thread(unsigned long clone_flags, unsigned long usp,
return 0;
}
/*
* c6x_execve() executes a new program.
*/
SYSCALL_DEFINE4(c6x_execve, const char __user *, name,
const char __user *const __user *, argv,
const char __user *const __user *, envp,
struct pt_regs *, regs)
{
int error;
char *filename;
filename = getname(name);
error = PTR_ERR(filename);
if (IS_ERR(filename))
goto out;
error = do_execve(filename, argv, envp, regs);
putname(filename);
out:
return error;
}
unsigned long get_wchan(struct task_struct *p)
{
return p->thread.wchan;

3
arch/cris/include/asm/thread_info.h
View File

@ -78,15 +78,12 @@ struct thread_info {
#define TIF_SIGPENDING 2 /* signal pending */
#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
#define TIF_RESTORE_SIGMASK 9 /* 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_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
#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 */

1
arch/frv/Kconfig
View File

@ -12,6 +12,7 @@ config FRV
select ARCH_HAVE_NMI_SAFE_CMPXCHG
select GENERIC_CPU_DEVICES
select ARCH_WANT_IPC_PARSE_VERSION
select GENERIC_KERNEL_THREAD
config ZONE_DMA
bool

9
arch/frv/include/asm/processor.h
View File

@ -92,14 +92,12 @@ extern struct task_struct *__kernel_current_task;
/*
* do necessary setup to start up a newly executed thread.
* - need to discard the frame stacked by init() invoking the execve syscall
*/
#define start_thread(_regs, _pc, _usp) \
do { \
__frame = __kernel_frame0_ptr; \
__frame->pc = (_pc); \
__frame->psr &= ~PSR_S; \
__frame->sp = (_usp); \
_regs->pc = (_pc); \
_regs->psr &= ~PSR_S; \
_regs->sp = (_usp); \
} while(0)
/* Free all resources held by a thread. */
@ -107,7 +105,6 @@ static inline void release_thread(struct task_struct *dead_task)
{
}
extern asmlinkage int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
extern asmlinkage void save_user_regs(struct user_context *target);
extern asmlinkage void *restore_user_regs(const struct user_context *target, ...);

1
arch/frv/include/asm/ptrace.h
View File

@ -76,6 +76,7 @@ register struct pt_regs *__frame asm("gr28");
#define user_mode(regs) (!((regs)->psr & PSR_S))
#define instruction_pointer(regs) ((regs)->pc)
#define user_stack_pointer(regs) ((regs)->sp)
#define current_pt_regs() (__frame)
extern unsigned long user_stack(const struct pt_regs *);
#define profile_pc(regs) ((regs)->pc)

3
arch/frv/include/asm/thread_info.h
View File

@ -94,7 +94,6 @@ 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 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)
@ -102,8 +101,6 @@ register struct thread_info *__current_thread_info asm("gr15");
#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
#define _TIF_SINGLESTEP (1 << TIF_SINGLESTEP)
#define _TIF_RESTORE_SIGMASK (1 << TIF_RESTORE_SIGMASK)
#define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG)
/* work to do on interrupt/exception return */
#define _TIF_WORK_MASK \

2
arch/frv/include/asm/unistd.h
View File

@ -372,6 +372,8 @@
#define __ARCH_WANT_SYS_SIGPROCMASK
#define __ARCH_WANT_SYS_RT_SIGACTION
#define __ARCH_WANT_SYS_RT_SIGSUSPEND
#define __ARCH_WANT_SYS_EXECVE
#define __ARCH_WANT_KERNEL_EXECVE
/*
* "Conditional" syscalls

4
arch/frv/kernel/Makefile
View File

@ -7,8 +7,8 @@ heads-$(CONFIG_MMU) := head-mmu-fr451.o
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 \
obj-y := $(heads-y) entry.o entry-table.o break.o switch_to.o \
process.o traps.o ptrace.o signal.o dma.o \
sys_frv.o time.o setup.o frv_ksyms.o \
debug-stub.o irq.o sleep.o uaccess.o

13
arch/frv/kernel/entry.S
View File

@ -863,6 +863,19 @@ ret_from_fork:
setlos.p #0,gr8
bra __syscall_exit
.globl ret_from_kernel_thread
ret_from_kernel_thread:
lddi.p @(gr28,#REG_GR(8)),gr20
call schedule_tail
or.p gr20,gr20,gr8
calll @(gr21,gr0)
bra sys_exit
.globl ret_from_kernel_execve
ret_from_kernel_execve:
ori gr28,0,sp
bra __syscall_exit
###################################################################################################
#
# Return to user mode is not as complex as all this looks,

1
arch/frv/kernel/frv_ksyms.c
View File

@ -30,7 +30,6 @@ EXPORT_SYMBOL(ip_fast_csum);
EXPORT_SYMBOL(local_irq_count);
EXPORT_SYMBOL(local_bh_count);
#endif
EXPORT_SYMBOL(kernel_thread);
EXPORT_SYMBOL(__res_bus_clock_speed_HZ);
EXPORT_SYMBOL(__page_offset);

33
arch/frv/kernel/kernel_execve.S
View File

@ -1,33 +0,0 @@
/* in-kernel program execution
*
* Copyright (C) 2006 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#include <linux/linkage.h>
#include <asm/unistd.h>
###############################################################################
#
# Do a system call from kernel instead of calling sys_execve so we end up with
# proper pt_regs.
#
# int kernel_execve(const char *filename, char *const argv[], char *const envp[])
#
# On entry: GR8/GR9/GR10: arguments to function
# On return: GR8: syscall return.
#
###############################################################################
.globl kernel_execve
.type kernel_execve,@function
kernel_execve:
setlos __NR_execve,gr7
tira gr0,#0
bralr
.size kernel_execve,.-kernel_execve

77
arch/frv/kernel/kernel_thread.S
View File

@ -1,77 +0,0 @@
/* kernel_thread.S: kernel thread creation
*
* Copyright (C) 2003 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#include <linux/linkage.h>
#include <linux/kern_levels.h>
#include <asm/unistd.h>
#define CLONE_VM 0x00000100 /* set if VM shared between processes */
.section .rodata
kernel_thread_emsg:
.asciz KERN_ERR "failed to create kernel thread: error=%d\n"
.text
.balign 4
###############################################################################
#
# Create a kernel thread
#
# int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags)
#
###############################################################################
.globl kernel_thread
.type kernel_thread,@function
kernel_thread:
or.p gr8,gr0,gr4
or gr9,gr0,gr5
# start by forking the current process, but with shared VM
setlos.p #__NR_clone,gr7 ; syscall number
ori gr10,#CLONE_VM,gr8 ; first syscall arg [clone_flags]
sethi.p #0xe4e4,gr9 ; second syscall arg [newsp]
setlo #0xe4e4,gr9
setlos.p #0,gr10 ; third syscall arg [parent_tidptr]
setlos #0,gr11 ; fourth syscall arg [child_tidptr]
tira gr0,#0
setlos.p #4095,gr7
andcc gr8,gr8,gr0,icc0
addcc.p gr8,gr7,gr0,icc1
bnelr icc0,#2
bc icc1,#0,kernel_thread_error
# now invoke the work function
or gr5,gr0,gr8
calll @(gr4,gr0)
# and finally exit the thread
setlos #__NR_exit,gr7 ; syscall number
tira gr0,#0
kernel_thread_error:
subi sp,#8,sp
movsg lr,gr4
sti gr8,@(sp,#0)
sti.p gr4,@(sp,#4)
or gr8,gr0,gr9
sethi.p %hi(kernel_thread_emsg),gr8
setlo %lo(kernel_thread_emsg),gr8
call printk
ldi @(sp,#4),gr4
ldi @(sp,#0),gr8
subi sp,#8,sp
jmpl @(gr4,gr0)
.size kernel_thread,.-kernel_thread

66
arch/frv/kernel/process.c
View File

@ -38,6 +38,7 @@
#include "local.h"
asmlinkage void ret_from_fork(void);
asmlinkage void ret_from_kernel_thread(void);
#include <asm/pgalloc.h>
@ -172,32 +173,13 @@ asmlinkage int sys_clone(unsigned long clone_flags, unsigned long newsp,
* set up the kernel stack and exception frames for a new process
*/
int copy_thread(unsigned long clone_flags,
unsigned long usp, unsigned long topstk,
unsigned long usp, unsigned long arg,
struct task_struct *p, struct pt_regs *regs)
{
struct pt_regs *childregs0, *childregs, *regs0;
struct pt_regs *childregs;
regs0 = __kernel_frame0_ptr;
childregs0 = (struct pt_regs *)
childregs = (struct pt_regs *)
(task_stack_page(p) + THREAD_SIZE - FRV_FRAME0_SIZE);
childregs = childregs0;
/* set up the userspace frame (the only place that the USP is stored) */
*childregs0 = *regs0;
childregs0->gr8 = 0;
childregs0->sp = usp;
childregs0->next_frame = NULL;
/* set up the return kernel frame if called from kernel_thread() */
if (regs != regs0) {
childregs--;
*childregs = *regs;
childregs->sp = (unsigned long) childregs0;
childregs->next_frame = childregs0;
childregs->gr15 = (unsigned long) task_thread_info(p);
childregs->gr29 = (unsigned long) p;
}
p->set_child_tid = p->clear_child_tid = NULL;
@ -206,8 +188,25 @@ int copy_thread(unsigned long clone_flags,
p->thread.sp = (unsigned long) childregs;
p->thread.fp = 0;
p->thread.lr = 0;
p->thread.pc = (unsigned long) ret_from_fork;
p->thread.frame0 = childregs0;
p->thread.frame0 = childregs;
if (unlikely(!regs)) {
memset(childregs, 0, sizeof(struct pt_regs));
childregs->gr9 = usp; /* function */
childregs->gr8 = arg;
chilregs->psr = PSR_S;
p->thread.pc = (unsigned long) ret_from_kernel_thread;
save_user_regs(p->thread.user);
return 0;
}
/* set up the userspace frame (the only place that the USP is stored) */
*childregs = *regs;
childregs->sp = usp;
childregs->next_frame = NULL;
p->thread.pc = (unsigned long) ret_from_fork;
/* the new TLS pointer is passed in as arg #5 to sys_clone() */
if (clone_flags & CLONE_SETTLS)
@ -218,25 +217,6 @@ int copy_thread(unsigned long clone_flags,
return 0;
} /* end copy_thread() */
/*
* sys_execve() executes a new program.
*/
asmlinkage int sys_execve(const char __user *name,
const char __user *const __user *argv,
const char __user *const __user *envp)
{
int error;
char * filename;
filename = getname(name);
error = PTR_ERR(filename);
if (IS_ERR(filename))
return error;
error = do_execve(filename, argv, envp, __frame);
putname(filename);
return error;
}
unsigned long get_wchan(struct task_struct *p)
{
struct pt_regs *regs0;

9
arch/frv/kernel/signal.c
View File

@ -20,7 +20,6 @@
#include <linux/ptrace.h>
#include <linux/unistd.h>
#include <linux/personality.h>
#include <linux/freezer.h>
#include <linux/tracehook.h>
#include <asm/ucontext.h>
#include <asm/uaccess.h>
@ -298,10 +297,6 @@ static int setup_frame(int sig, struct k_sigaction *ka, sigset_t *set)
__frame->lr = (unsigned long) &frame->retcode;
__frame->gr8 = sig;
/* the tracer may want to single-step inside the handler */
if (test_thread_flag(TIF_SINGLESTEP))
ptrace_notify(SIGTRAP);
#if DEBUG_SIG
printk("SIG deliver %d (%s:%d): sp=%p pc=%lx ra=%p\n",
sig, current->comm, current->pid, frame, __frame->pc,
@ -400,10 +395,6 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
__frame->gr8 = sig;
__frame->gr9 = (unsigned long) &frame->info;
/* the tracer may want to single-step inside the handler */
if (test_thread_flag(TIF_SINGLESTEP))
ptrace_notify(SIGTRAP);
#if DEBUG_SIG
printk("SIG deliver %d (%s:%d): sp=%p pc=%lx ra=%p\n",
sig, current->comm, current->pid, frame, __frame->pc,

7
arch/h8300/include/asm/thread_info.h
View File

@ -85,8 +85,6 @@ static inline struct thread_info *current_thread_info(void)
#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
#define TIF_SIGPENDING 1 /* signal pending */
#define TIF_NEED_RESCHED 2 /* rescheduling necessary */
#define TIF_POLLING_NRFLAG 3 /* true if poll_idle() is polling
TIF_NEED_RESCHED */
#define TIF_MEMDIE 4 /* is terminating due to OOM killer */
#define TIF_RESTORE_SIGMASK 5 /* restore signal mask in do_signal() */
#define TIF_NOTIFY_RESUME 6 /* callback before returning to user */
@ -95,11 +93,10 @@ static inline struct thread_info *current_thread_info(void)
#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
#define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
#define _TIF_RESTORE_SIGMASK (1<<TIF_RESTORE_SIGMASK)
#define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME)
#define _TIF_WORK_MASK 0x0000FFFE /* work to do on interrupt/exception return */
#define _TIF_WORK_MASK (_TIF_SIGPENDING | _TIF_NEED_RESCHED | \
_TIF_NOTIFY_RESUME)
#endif /* __KERNEL__ */

1
arch/h8300/kernel/signal.c
View File

@ -38,7 +38,6 @@
#include <linux/personality.h>
#include <linux/tty.h>
#include <linux/binfmts.h>
#include <linux/freezer.h>
#include <linux/tracehook.h>
#include <asm/setup.h>

5
arch/hexagon/include/asm/thread_info.h
View File

@ -120,10 +120,8 @@ register struct thread_info *__current_thread_info asm(QUOTED_THREADINFO_REG);
#define TIF_SIGPENDING 2 /* signal pending */
#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
#define TIF_SINGLESTEP 4 /* restore ss @ return to usr mode */
#define TIF_IRET 5 /* return with iret */
#define TIF_RESTORE_SIGMASK 6 /* restore sig mask in do_signal() */
/* true if poll_idle() is polling TIF_NEED_RESCHED */
#define TIF_POLLING_NRFLAG 16
#define TIF_MEMDIE 17 /* OOM killer killed process */
#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
@ -131,9 +129,6 @@ register struct thread_info *__current_thread_info asm(QUOTED_THREADINFO_REG);
#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
#define _TIF_SINGLESTEP (1 << TIF_SINGLESTEP)
#define _TIF_IRET (1 << TIF_IRET)
#define _TIF_RESTORE_SIGMASK (1 << TIF_RESTORE_SIGMASK)
#define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG)
/* work to do on interrupt/exception return - All but TIF_SYSCALL_TRACE */
#define _TIF_WORK_MASK (0x0000FFFF & ~_TIF_SYSCALL_TRACE)

1
arch/hexagon/kernel/signal.c
View File

@ -20,7 +20,6 @@
#include <linux/linkage.h>
#include <linux/syscalls.h>
#include <linux/freezer.h>
#include <linux/tracehook.h>
#include <asm/registers.h>
#include <asm/thread_info.h>

2
arch/ia64/include/asm/thread_info.h
View File

@ -106,7 +106,6 @@ struct thread_info {
#define TIF_SYSCALL_AUDIT 3 /* syscall auditing active */
#define TIF_SINGLESTEP 4 /* restore singlestep on return to user mode */
#define TIF_NOTIFY_RESUME 6 /* resumption notification requested */
#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_MCA_INIT 18 /* this task is processing MCA or INIT */
#define TIF_DB_DISABLED 19 /* debug trap disabled for fsyscall */
@ -119,7 +118,6 @@ struct thread_info {
#define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME)
#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
#define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG)
#define _TIF_MCA_INIT (1 << TIF_MCA_INIT)
#define _TIF_DB_DISABLED (1 << TIF_DB_DISABLED)
#define _TIF_RESTORE_RSE (1 << TIF_RESTORE_RSE)

8
arch/ia64/kernel/signal.c
View File

@ -437,14 +437,6 @@ ia64_do_signal (struct sigscratch *scr, long in_syscall)
long restart = in_syscall;
long errno = scr->pt.r8;
/*
* In the ia64_leave_kernel code path, 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(&scr->pt))
return;
/*
* This only loops in the rare cases of handle_signal() failing, in which case we
* need to push through a forced SIGSEGV.

9
arch/m32r/include/asm/thread_info.h
View File

@ -119,25 +119,20 @@ static inline unsigned int get_thread_fault_code(void)
#define TIF_SIGPENDING 1 /* signal pending */
#define TIF_NEED_RESCHED 2 /* rescheduling necessary */
#define TIF_SINGLESTEP 3 /* restore singlestep on return to user mode */
#define TIF_IRET 4 /* return with iret */
#define TIF_NOTIFY_RESUME 5 /* callback before returning to user */
#define TIF_RESTORE_SIGMASK 8 /* restore signal mask in do_signal() */
#define TIF_USEDFPU 16 /* FPU was used by this task this quantum (SMP) */
#define TIF_POLLING_NRFLAG 17 /* true if poll_idle() is polling TIF_NEED_RESCHED */
#define TIF_MEMDIE 18 /* is terminating due to OOM killer */
#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
#define _TIF_SINGLESTEP (1<<TIF_SINGLESTEP)
#define _TIF_IRET (1<<TIF_IRET)
#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
#define _TIF_RESTORE_SIGMASK (1<<TIF_RESTORE_SIGMASK)
#define _TIF_USEDFPU (1<<TIF_USEDFPU)
#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 */
#define _TIF_WORK_MASK (_TIF_SIGPENDING | _TIF_NEED_RESCHED | _TIF_NOTIFY_RESUME)
#define _TIF_ALLWORK_MASK (_TIF_WORK_MASK | _TIF_SYSCALL_TRACE)
/*
* Thread-synchronous status.

3
arch/m32r/kernel/signal.c
View File

@ -20,7 +20,6 @@
#include <linux/unistd.h>
#include <linux/stddef.h>
#include <linux/personality.h>
#include <linux/freezer.h>
#include <linux/tracehook.h>
#include <asm/cacheflush.h>
#include <asm/ucontext.h>
@ -366,6 +365,4 @@ void do_notify_resume(struct pt_regs *regs, __u32 thread_info_flags)
clear_thread_flag(TIF_NOTIFY_RESUME);
tracehook_notify_resume(regs);
}
clear_thread_flag(TIF_IRET);
}

1
arch/m68k/Kconfig
View File

@ -15,6 +15,7 @@ config M68K
select FPU if MMU
select ARCH_WANT_IPC_PARSE_VERSION
select ARCH_USES_GETTIMEOFFSET if MMU && !COLDFIRE
select GENERIC_KERNEL_THREAD
config RWSEM_GENERIC_SPINLOCK
bool

25
arch/m68k/include/asm/processor.h
View File

@ -100,6 +100,16 @@ struct thread_struct {
.fs = __KERNEL_DS, \
}
/*
* ColdFire stack format sbould be 0x4 for an aligned usp (will always be
* true on thread creation). We need to set this explicitly.
*/
#ifdef CONFIG_COLDFIRE
#define setframeformat(_regs) do { (_regs)->format = 0x4; } while(0)
#else
#define setframeformat(_regs) do { } while (0)
#endif
#ifdef CONFIG_MMU
/*
* Do necessary setup to start up a newly executed thread.
@ -109,6 +119,7 @@ static inline void start_thread(struct pt_regs * regs, unsigned long pc,
{
regs->pc = pc;
regs->sr &= ~0x2000;
setframeformat(regs);
wrusp(usp);
}
@ -116,21 +127,11 @@ extern int handle_kernel_fault(struct pt_regs *regs);
#else
/*
* Coldfire stacks need to be re-aligned on trap exit, conventional
* 68k can handle this case cleanly.
*/
#ifdef CONFIG_COLDFIRE
#define reformat(_regs) do { (_regs)->format = 0x4; } while(0)
#else
#define reformat(_regs) do { } while (0)
#endif
#define start_thread(_regs, _pc, _usp) \
do { \
(_regs)->pc = (_pc); \
((struct switch_stack *)(_regs))[-1].a6 = 0; \
reformat(_regs); \
setframeformat(_regs); \
if (current->mm) \
(_regs)->d5 = current->mm->start_data; \
(_regs)->sr &= ~0x2000; \
@ -153,8 +154,6 @@ static inline void release_thread(struct task_struct *dead_task)
{
}
extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
/*
* Free current thread data structures etc..
*/

2
arch/m68k/include/asm/ptrace.h
View File

@ -85,6 +85,8 @@ struct switch_stack {
#define user_mode(regs) (!((regs)->sr & PS_S))
#define instruction_pointer(regs) ((regs)->pc)
#define profile_pc(regs) instruction_pointer(regs)
#define current_pt_regs() \
(struct pt_regs *)((char *)current_thread_info() + THREAD_SIZE) - 1
#define arch_has_single_step() (1)

2
arch/m68k/include/asm/unistd.h
View File

@ -382,6 +382,8 @@
#define __ARCH_WANT_SYS_SIGPROCMASK
#define __ARCH_WANT_SYS_RT_SIGACTION
#define __ARCH_WANT_SYS_RT_SIGSUSPEND
#define __ARCH_WANT_SYS_EXECVE
#define __ARCH_WANT_KERNEL_EXECVE
/*
* "Conditional" syscalls

16
arch/m68k/kernel/entry.S
View File

@ -111,6 +111,22 @@ ENTRY(ret_from_fork)
addql #4,%sp
jra ret_from_exception
ENTRY(ret_from_kernel_thread)
| a3 contains the kernel thread payload, d7 - its argument
movel %d1,%sp@-
jsr schedule_tail
GET_CURRENT(%d0)
movel %d7,(%sp)
jsr %a3@
addql #4,%sp
movel %d0,(%sp)
jra sys_exit
ENTRY(ret_from_kernel_execve)
movel 4(%sp), %sp
GET_CURRENT(%d0)
jra ret_from_exception
#if defined(CONFIG_COLDFIRE) || !defined(CONFIG_MMU)
#ifdef TRAP_DBG_INTERRUPT

104
arch/m68k/kernel/process.c
View File

@ -35,6 +35,7 @@
asmlinkage void ret_from_fork(void);
asmlinkage void ret_from_kernel_thread(void);
/*
@ -123,51 +124,6 @@ void show_regs(struct pt_regs * regs)
printk("USP: %08lx\n", rdusp());
}
/*
* Create a kernel thread
*/
int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags)
{
int pid;
mm_segment_t fs;
fs = get_fs();
set_fs (KERNEL_DS);
{
register long retval __asm__ ("d0");
register long clone_arg __asm__ ("d1") = flags | CLONE_VM | CLONE_UNTRACED;
retval = __NR_clone;
__asm__ __volatile__
("clrl %%d2\n\t"
"trap #0\n\t" /* Linux/m68k system call */
"tstl %0\n\t" /* child or parent */
"jne 1f\n\t" /* parent - jump */
#ifdef CONFIG_MMU
"lea %%sp@(%c7),%6\n\t" /* reload current */
"movel %6@,%6\n\t"
#endif
"movel %3,%%sp@-\n\t" /* push argument */
"jsr %4@\n\t" /* call fn */
"movel %0,%%d1\n\t" /* pass exit value */
"movel %2,%%d0\n\t" /* exit */
"trap #0\n"
"1:"
: "+d" (retval)
: "i" (__NR_clone), "i" (__NR_exit),
"r" (arg), "a" (fn), "d" (clone_arg), "r" (current),
"i" (-THREAD_SIZE)
: "d2");
pid = retval;
}
set_fs (fs);
return pid;
}
EXPORT_SYMBOL(kernel_thread);
void flush_thread(void)
{
current->thread.fs = __USER_DS;
@ -219,30 +175,18 @@ asmlinkage int m68k_clone(struct pt_regs *regs)
}
int copy_thread(unsigned long clone_flags, unsigned long usp,
unsigned long unused,
unsigned long arg,
struct task_struct * p, struct pt_regs * regs)
{
struct pt_regs * childregs;
struct switch_stack * childstack, *stack;
unsigned long *retp;
struct switch_stack *childstack;
childregs = (struct pt_regs *) (task_stack_page(p) + THREAD_SIZE) - 1;
*childregs = *regs;
childregs->d0 = 0;
retp = ((unsigned long *) regs);
stack = ((struct switch_stack *) retp) - 1;
childstack = ((struct switch_stack *) childregs) - 1;
*childstack = *stack;
childstack->retpc = (unsigned long)ret_from_fork;
p->thread.usp = usp;
p->thread.ksp = (unsigned long)childstack;
if (clone_flags & CLONE_SETTLS)
task_thread_info(p)->tp_value = regs->d5;
p->thread.esp0 = (unsigned long)childregs;
/*
* Must save the current SFC/DFC value, NOT the value when
@ -250,6 +194,26 @@ int copy_thread(unsigned long clone_flags, unsigned long usp,
*/
p->thread.fs = get_fs().seg;
if (unlikely(!regs)) {
/* kernel thread */
memset(childstack, 0,
sizeof(struct switch_stack) + sizeof(struct pt_regs));
childregs->sr = PS_S;
childstack->a3 = usp; /* function */
childstack->d7 = arg;
childstack->retpc = (unsigned long)ret_from_kernel_thread;
p->thread.usp = 0;
return 0;
}
*childregs = *regs;
childregs->d0 = 0;
*childstack = ((struct switch_stack *) regs)[-1];
childstack->retpc = (unsigned long)ret_from_fork;
if (clone_flags & CLONE_SETTLS)
task_thread_info(p)->tp_value = regs->d5;
#ifdef CONFIG_FPU
if (!FPU_IS_EMU) {
/* Copy the current fpu state */
@ -337,26 +301,6 @@ int dump_fpu (struct pt_regs *regs, struct user_m68kfp_struct *fpu)
EXPORT_SYMBOL(dump_fpu);
#endif /* CONFIG_FPU */
/*
* sys_execve() executes a new program.
*/
asmlinkage int sys_execve(const char __user *name,
const char __user *const __user *argv,
const char __user *const __user *envp)
{
int error;
char * filename;
struct pt_regs *regs = (struct pt_regs *) &name;
filename = getname(name);
error = PTR_ERR(filename);
if (IS_ERR(filename))
return error;
error = do_execve(filename, argv, envp, regs);
putname(filename);
return error;
}
unsigned long get_wchan(struct task_struct *p)
{
unsigned long fp, pc;

17
arch/m68k/kernel/sys_m68k.c
View File

@ -549,23 +549,6 @@ asmlinkage int sys_getpagesize(void)
return PAGE_SIZE;
}
/*
* Do a system call from kernel instead of calling sys_execve so we
* end up with proper pt_regs.
*/
int kernel_execve(const char *filename,
const char *const argv[],
const char *const envp[])
{
register long __res asm ("%d0") = __NR_execve;
register long __a asm ("%d1") = (long)(filename);
register long __b asm ("%d2") = (long)(argv);
register long __c asm ("%d3") = (long)(envp);
asm volatile ("trap #0" : "+d" (__res)
: "d" (__a), "d" (__b), "d" (__c));
return __res;
}
asmlinkage unsigned long sys_get_thread_area(void)
{
return current_thread_info()->tp_value;

3
arch/microblaze/include/asm/thread_info.h
View File

@ -121,7 +121,6 @@ static inline struct thread_info *current_thread_info(void)
#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
/* restore singlestep on return to user mode */
#define TIF_SINGLESTEP 4
#define TIF_IRET 5 /* return with iret */
#define TIF_MEMDIE 6 /* is terminating due to OOM killer */
#define TIF_SYSCALL_AUDIT 9 /* syscall auditing active */
#define TIF_SECCOMP 10 /* secure computing */
@ -134,7 +133,6 @@ static inline struct thread_info *current_thread_info(void)
#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
#define _TIF_SINGLESTEP (1 << TIF_SINGLESTEP)
#define _TIF_IRET (1 << TIF_IRET)
#define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG)
#define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT)
#define _TIF_SECCOMP (1 << TIF_SECCOMP)
@ -184,6 +182,7 @@ static inline bool test_and_clear_restore_sigmask(void)
ti->status &= ~TS_RESTORE_SIGMASK;
return true;
}
#define tsk_is_polling(t) test_tsk_thread_flag(t, TIF_POLLING_NRFLAG)
#endif
#endif /* __KERNEL__ */

7
arch/microblaze/kernel/signal.c
View File

@ -254,10 +254,6 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
set_fs(USER_DS);
/* the tracer may want to single-step inside the handler */
if (test_thread_flag(TIF_SINGLESTEP))
ptrace_notify(SIGTRAP);
#ifdef DEBUG_SIG
printk(KERN_INFO "SIG deliver (%s:%d): sp=%p pc=%08lx\n",
current->comm, current->pid, frame, regs->pc);
@ -315,7 +311,8 @@ handle_signal(unsigned long sig, struct k_sigaction *ka,
if (ret)
return;
signal_delivered(sig, info, ka, regs, 0);
signal_delivered(sig, info, ka, regs,
test_thread_flag(TIF_SINGLESTEP));
}
/*

3
arch/mips/include/asm/thread_info.h
View File

@ -103,7 +103,6 @@ register struct thread_info *__current_thread_info __asm__("$28");
#define TIF_NOTIFY_RESUME 5 /* callback before returning to user */
#define TIF_RESTORE_SIGMASK 9 /* restore signal mask in do_signal() */
#define TIF_USEDFPU 16 /* FPU was used by this task this quantum (SMP) */
#define TIF_POLLING_NRFLAG 17 /* true if poll_idle() is polling TIF_NEED_RESCHED */
#define TIF_MEMDIE 18 /* is terminating due to OOM killer */
#define TIF_FIXADE 20 /* Fix address errors in software */
#define TIF_LOGADE 21 /* Log address errors to syslog */
@ -125,9 +124,7 @@ register struct thread_info *__current_thread_info __asm__("$28");
#define _TIF_SYSCALL_AUDIT (1<<TIF_SYSCALL_AUDIT)
#define _TIF_SECCOMP (1<<TIF_SECCOMP)
#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
#define _TIF_RESTORE_SIGMASK (1<<TIF_RESTORE_SIGMASK)
#define _TIF_USEDFPU (1<<TIF_USEDFPU)
#define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
#define _TIF_FIXADE (1<<TIF_FIXADE)
#define _TIF_LOGADE (1<<TIF_LOGADE)
#define _TIF_32BIT_REGS (1<<TIF_32BIT_REGS)

1
arch/mn10300/Kconfig
View File

@ -8,6 +8,7 @@ config MN10300
select HAVE_ARCH_KGDB
select HAVE_NMI_WATCHDOG if MN10300_WD_TIMER
select GENERIC_CLOCKEVENTS
select GENERIC_KERNEL_THREAD
config AM33_2
def_bool n

2
arch/mn10300/include/asm/frame.inc
View File

@ -61,7 +61,7 @@
###############################################################################
.macro RESTORE_ALL
# peel back the stack to the calling frame
# - this permits execve() to discard extra frames due to kernel syscalls
# - we need that when returning from interrupts to kernel mode
GET_THREAD_INFO a0
mov (TI_frame,a0),fp
mov fp,sp

18
arch/mn10300/include/asm/processor.h
View File

@ -119,31 +119,19 @@ struct thread_struct {
/*
* do necessary setup to start up a newly executed thread
* - need to discard the frame stacked by the kernel thread invoking the execve
* syscall (see RESTORE_ALL macro)
*/
static inline void start_thread(struct pt_regs *regs,
unsigned long new_pc, unsigned long new_sp)
{
struct thread_info *ti = current_thread_info();
struct pt_regs *frame0;
frame0 = thread_info_to_uregs(ti);
frame0->epsw = EPSW_nSL | EPSW_IE | EPSW_IM;
frame0->pc = new_pc;
frame0->sp = new_sp;
ti->frame = frame0;
regs->epsw = EPSW_nSL | EPSW_IE | EPSW_IM;
regs->pc = new_pc;
regs->sp = new_sp;
}
/* Free all resources held by a thread. */
extern void release_thread(struct task_struct *);
/*
* create a kernel thread without removing it from tasklists
*/
extern int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags);
/*
* Return saved PC of a blocked thread.
*/

1
arch/mn10300/include/asm/ptrace.h
View File

@ -86,6 +86,7 @@ struct pt_regs {
#define user_mode(regs) (((regs)->epsw & EPSW_nSL) == EPSW_nSL)
#define instruction_pointer(regs) ((regs)->pc)
#define user_stack_pointer(regs) ((regs)->sp)
#define current_pt_regs() current_frame()
#define arch_has_single_step() (1)

3
arch/mn10300/include/asm/thread_info.h
View File

@ -160,12 +160,13 @@ void arch_release_thread_info(struct thread_info *ti);
#define _TIF_SIGPENDING +(1 << TIF_SIGPENDING)
#define _TIF_NEED_RESCHED +(1 << TIF_NEED_RESCHED)
#define _TIF_SINGLESTEP +(1 << TIF_SINGLESTEP)
#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 */
#define tsk_is_polling(t) test_tsk_thread_flag(t, TIF_POLLING_NRFLAG)
#endif /* __KERNEL__ */
#endif /* _ASM_THREAD_INFO_H */

2
arch/mn10300/include/asm/unistd.h
View File

@ -382,6 +382,8 @@
#define __ARCH_WANT_SYS_SIGPROCMASK
#define __ARCH_WANT_SYS_RT_SIGACTION
#define __ARCH_WANT_SYS_RT_SIGSUSPEND
#define __ARCH_WANT_SYS_EXECVE
#define __ARCH_WANT_KERNEL_EXECVE
/*
* "Conditional" syscalls

4
arch/mn10300/kernel/Makefile
View File

@ -7,8 +7,8 @@ fpu-obj-y := fpu-nofpu.o fpu-nofpu-low.o
fpu-obj-$(CONFIG_FPU) := fpu.o fpu-low.o
obj-y := process.o signal.o entry.o traps.o irq.o \
ptrace.o setup.o time.o sys_mn10300.o io.o kthread.o \
switch_to.o mn10300_ksyms.o kernel_execve.o $(fpu-obj-y) \
ptrace.o setup.o time.o sys_mn10300.o io.o \
switch_to.o mn10300_ksyms.o $(fpu-obj-y) \
csrc-mn10300.o cevt-mn10300.o
obj-$(CONFIG_SMP) += smp.o smp-low.o

18
arch/mn10300/kernel/entry.S
View File

@ -55,6 +55,20 @@ ENTRY(ret_from_fork)
mov d0,(REG_D0,fp)
jmp syscall_exit
ENTRY(ret_from_kernel_thread)
call schedule_tail[],0
mov (REG_D0,fp),d0
mov (REG_A0,fp),a0
calls (a0)
jmp sys_exit
ENTRY(ret_from_kernel_execve)
add -12,d0 /* pt_regs -> frame */
mov d0,sp
GET_THREAD_INFO a2
clr d0
jmp syscall_exit
###############################################################################
#
# system call handler
@ -94,6 +108,10 @@ restore_all:
###############################################################################
ALIGN
syscall_exit_work:
mov (REG_EPSW,fp),d0
and EPSW_nSL,d0
beq resume_kernel # returning to supervisor mode
btst _TIF_SYSCALL_TRACE,d2
beq work_pending
LOCAL_IRQ_ENABLE # could let syscall_trace_exit() call

6
arch/mn10300/kernel/internal.h
View File

@ -14,15 +14,11 @@
struct clocksource;
struct clock_event_device;
/*
* kthread.S
*/
extern int kernel_thread_helper(int);
/*
* entry.S
*/
extern void ret_from_fork(struct task_struct *) __attribute__((noreturn));
extern void ret_from_kernel_thread(struct task_struct *) __attribute__((noreturn));
/*
* smp-low.S

37
arch/mn10300/kernel/kernel_execve.S
View File

@ -1,37 +0,0 @@
/* MN10300 In-kernel program execution
*
* Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public Licence
* as published by the Free Software Foundation; either version
* 2 of the Licence, or (at your option) any later version.
*/
#include <linux/linkage.h>
#include <asm/unistd.h>
###############################################################################
#
# Do a system call from kernel instead of calling sys_execve so we end up with
# proper pt_regs.
#
# int kernel_execve(const char *filename, char *const argv[],
# char *const envp[])
#
# On entry: D0/D1/8(SP): arguments to function
# On return: D0: syscall return.
#
###############################################################################
.globl kernel_execve
.type kernel_execve,@function
kernel_execve:
mov a3,a1
mov d0,a0
mov (12,sp),a3
mov +__NR_execve,d0
syscall 0
mov a1,a3
rets
.size kernel_execve,.-kernel_execve

31
arch/mn10300/kernel/kthread.S
View File

@ -1,31 +0,0 @@
/* MN10300 Kernel thread trampoline function
*
* Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
* Written by Mark Salter (msalter@redhat.com)
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public Licence
* as published by the Free Software Foundation; either version
* 2 of the Licence, or (at your option) any later version.
*/
.text
###############################################################################
#
# kernel_thread_helper - trampoline for kernel_thread()
#
# On entry:
# A2 = address of function to call
# D2 = function argument
#
###############################################################################
.globl kernel_thread_helper
.type kernel_thread_helper,@function
kernel_thread_helper:
mov do_exit,d1
mov d1,(sp)
mov d1,mdr
mov d2,d0
jmp (a2)
.size kernel_thread_helper,.-kernel_thread_helper

93
arch/mn10300/kernel/process.c
View File

@ -164,27 +164,6 @@ void show_regs(struct pt_regs *regs)
{
}
/*
* create a kernel thread
*/
int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags)
{
struct pt_regs regs;
memset(&regs, 0, sizeof(regs));
regs.a2 = (unsigned long) fn;
regs.d2 = (unsigned long) arg;
regs.pc = (unsigned long) kernel_thread_helper;
local_save_flags(regs.epsw);
regs.epsw |= EPSW_IE | EPSW_IM_7;
/* Ok, create the new process.. */
return do_fork(flags | CLONE_VM | CLONE_UNTRACED, 0, &regs, 0,
NULL, NULL);
}
EXPORT_SYMBOL(kernel_thread);
/*
* free current thread data structures etc..
*/
@ -230,50 +209,42 @@ int copy_thread(unsigned long clone_flags,
struct task_struct *p, struct pt_regs *kregs)
{
struct thread_info *ti = task_thread_info(p);
struct pt_regs *c_uregs, *c_kregs, *uregs;
struct pt_regs *c_regs;
unsigned long c_ksp;
uregs = current->thread.uregs;
c_ksp = (unsigned long) task_stack_page(p) + THREAD_SIZE;
/* allocate the userspace exception frame and set it up */
c_ksp -= sizeof(struct pt_regs);
c_uregs = (struct pt_regs *) c_ksp;
p->thread.uregs = c_uregs;
*c_uregs = *uregs;
c_uregs->sp = c_usp;
c_uregs->epsw &= ~EPSW_FE; /* my FPU */
c_regs = (struct pt_regs *) c_ksp;
c_ksp -= 12; /* allocate function call ABI slack */
/* set up things up so the scheduler can start the new task */
p->thread.uregs = c_regs;
ti->frame = c_regs;
p->thread.a3 = (unsigned long) c_regs;
p->thread.sp = c_ksp;
p->thread.wchan = p->thread.pc;
p->thread.usp = c_usp;
if (unlikely(!kregs)) {
memset(c_regs, 0, sizeof(struct pt_regs));
c_regs->a0 = c_usp; /* function */
c_regs->d0 = ustk_size; /* argument */
local_save_flags(c_regs->epsw);
c_regs->epsw |= EPSW_IE | EPSW_IM_7;
p->thread.pc = (unsigned long) ret_from_kernel_thread;
return 0;
}
*c_regs = *kregs;
c_regs->sp = c_usp;
c_regs->epsw &= ~EPSW_FE; /* my FPU */
/* the new TLS pointer is passed in as arg #5 to sys_clone() */
if (clone_flags & CLONE_SETTLS)
c_uregs->e2 = current_frame()->d3;
c_regs->e2 = current_frame()->d3;
/* set up the return kernel frame if called from kernel_thread() */
c_kregs = c_uregs;
if (kregs != uregs) {
c_ksp -= sizeof(struct pt_regs);
c_kregs = (struct pt_regs *) c_ksp;
*c_kregs = *kregs;
c_kregs->sp = c_usp;
c_kregs->next = c_uregs;
#ifdef CONFIG_MN10300_CURRENT_IN_E2
c_kregs->e2 = (unsigned long) p; /* current */
#endif
c_ksp -= 12; /* allocate function call ABI slack */
}
/* set up things up so the scheduler can start the new task */
ti->frame = c_kregs;
p->thread.a3 = (unsigned long) c_kregs;
p->thread.sp = c_ksp;
p->thread.pc = (unsigned long) ret_from_fork;
p->thread.wchan = (unsigned long) ret_from_fork;
p->thread.usp = c_usp;
return 0;
}
@ -302,22 +273,6 @@ asmlinkage long sys_vfork(void)
current_frame(), 0, NULL, NULL);
}
asmlinkage long sys_execve(const char __user *name,
const char __user *const __user *argv,
const char __user *const __user *envp)
{
char *filename;
int error;
filename = getname(name);
error = PTR_ERR(filename);
if (IS_ERR(filename))
return error;
error = do_execve(filename, argv, envp, current_frame());
putname(filename);
return error;
}
unsigned long get_wchan(struct task_struct *p)
{
return p->thread.wchan;

13
arch/mn10300/kernel/signal.c
View File

@ -317,10 +317,6 @@ static int setup_frame(int sig, struct k_sigaction *ka, sigset_t *set,
regs->d0 = sig;
regs->d1 = (unsigned long) &frame->sc;
/* the tracer may want to single-step inside the handler */
if (test_thread_flag(TIF_SINGLESTEP))
ptrace_notify(SIGTRAP);
#if DEBUG_SIG
printk(KERN_DEBUG "SIG deliver %d (%s:%d): sp=%p pc=%lx ra=%p\n",
sig, current->comm, current->pid, frame, regs->pc,
@ -398,10 +394,6 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
regs->d0 = sig;
regs->d1 = (long) &frame->info;
/* the tracer may want to single-step inside the handler */
if (test_thread_flag(TIF_SINGLESTEP))
ptrace_notify(SIGTRAP);
#if DEBUG_SIG
printk(KERN_DEBUG "SIG deliver %d (%s:%d): sp=%p pc=%lx ra=%p\n",
sig, current->comm, current->pid, frame, regs->pc,
@ -475,11 +467,6 @@ static void do_signal(struct pt_regs *regs)
siginfo_t info;
int signr;
/* we want the common case to go fast, which is why we may in certain
* cases get here from kernel mode */
if (!user_mode(regs))
return;
signr = get_signal_to_deliver(&info, &ka, regs, NULL);
if (signr > 0) {
if (handle_signal(signr, &info, &ka, regs) == 0) {

3
arch/openrisc/include/asm/thread_info.h
View File

@ -121,7 +121,6 @@ register struct thread_info *current_thread_info_reg asm("r10");
#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
#define _TIF_SINGLESTEP (1<<TIF_SINGLESTEP)
#define _TIF_RESTORE_SIGMASK (1<<TIF_RESTORE_SIGMASK)
#define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
@ -129,6 +128,8 @@ register struct thread_info *current_thread_info_reg asm("r10");
/* For OpenRISC, this is anything in the LSW other than syscall trace */
#define _TIF_WORK_MASK (0xff & ~(_TIF_SYSCALL_TRACE|_TIF_SINGLESTEP))
#define tsk_is_polling(t) test_tsk_thread_flag(t, TIF_POLLING_NRFLAG)
#endif /* __KERNEL__ */
#endif /* _ASM_THREAD_INFO_H */

2
arch/parisc/hpux/gate.S
View File

@ -71,7 +71,7 @@ ENTRY(hpux_gateway_page)
STREG %r26, TASK_PT_GR26(%r1) /* 1st argument */
STREG %r27, TASK_PT_GR27(%r1) /* user dp */
STREG %r28, TASK_PT_GR28(%r1) /* return value 0 */
STREG %r28, TASK_PT_ORIG_R28(%r1) /* return value 0 (saved for signals) */
STREG %r0, TASK_PT_ORIG_R28(%r1) /* don't prohibit restarts */
STREG %r29, TASK_PT_GR29(%r1) /* 8th argument */
STREG %r31, TASK_PT_GR31(%r1) /* preserve syscall return ptr */

5
arch/parisc/include/asm/thread_info.h
View File

@ -68,13 +68,16 @@ struct thread_info {
#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
#define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG)
#define _TIF_32BIT (1 << TIF_32BIT)
#define _TIF_RESTORE_SIGMASK (1 << TIF_RESTORE_SIGMASK)
#define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME)
#define _TIF_SINGLESTEP (1 << TIF_SINGLESTEP)
#define _TIF_BLOCKSTEP (1 << TIF_BLOCKSTEP)
#define _TIF_USER_WORK_MASK (_TIF_SIGPENDING | _TIF_NOTIFY_RESUME | \
_TIF_NEED_RESCHED)
#define _TIF_SYSCALL_TRACE_MASK (_TIF_SYSCALL_TRACE | _TIF_SINGLESTEP | \
_TIF_BLOCKSTEP)
#define tsk_is_polling(t) test_tsk_thread_flag(t, TIF_POLLING_NRFLAG)
#endif /* __KERNEL__ */

45
arch/parisc/kernel/signal.c
View File

@ -113,6 +113,8 @@ sys_rt_sigreturn(struct pt_regs *regs, int in_syscall)
(usp - sigframe_size);
DBG(2,"sys_rt_sigreturn: frame is %p\n", frame);
regs->orig_r28 = 1; /* no restarts for sigreturn */
#ifdef CONFIG_64BIT
compat_frame = (struct compat_rt_sigframe __user *)frame;
@ -437,7 +439,7 @@ give_sigsegv:
* OK, we're invoking a handler.
*/
static long
static void
handle_signal(unsigned long sig, siginfo_t *info, struct k_sigaction *ka,
struct pt_regs *regs, int in_syscall)
{
@ -447,7 +449,7 @@ handle_signal(unsigned long sig, siginfo_t *info, struct k_sigaction *ka,
/* Set up the stack frame */
if (!setup_rt_frame(sig, ka, info, oldset, regs, in_syscall))
return 0;
return;
signal_delivered(sig, info, ka, regs,
test_thread_flag(TIF_SINGLESTEP) ||
@ -455,13 +457,14 @@ handle_signal(unsigned long sig, siginfo_t *info, struct k_sigaction *ka,
DBG(1,KERN_DEBUG "do_signal: Exit (success), regs->gr[28] = %ld\n",
regs->gr[28]);
return 1;
}
static inline void
syscall_restart(struct pt_regs *regs, struct k_sigaction *ka)
{
if (regs->orig_r28)
return;
regs->orig_r28 = 1; /* no more restarts */
/* Check the return code */
switch (regs->gr[28]) {
case -ERESTART_RESTARTBLOCK:
@ -482,8 +485,6 @@ syscall_restart(struct pt_regs *regs, struct k_sigaction *ka)
* we have to do is fiddle the return pointer.
*/
regs->gr[31] -= 8; /* delayed branching */
/* Preserve original r28. */
regs->gr[28] = regs->orig_r28;
break;
}
}
@ -491,6 +492,9 @@ syscall_restart(struct pt_regs *regs, struct k_sigaction *ka)
static inline void
insert_restart_trampoline(struct pt_regs *regs)
{
if (regs->orig_r28)
return;
regs->orig_r28 = 1; /* no more restarts */
switch(regs->gr[28]) {
case -ERESTART_RESTARTBLOCK: {
/* Restart the system call - no handlers present */
@ -525,9 +529,6 @@ insert_restart_trampoline(struct pt_regs *regs)
flush_user_icache_range(regs->gr[30], regs->gr[30] + 4);
regs->gr[31] = regs->gr[30] + 8;
/* Preserve original r28. */
regs->gr[28] = regs->orig_r28;
return;
}
case -ERESTARTNOHAND:
@ -539,9 +540,6 @@ insert_restart_trampoline(struct pt_regs *regs)
* slot of the branch external instruction.
*/
regs->gr[31] -= 8;
/* Preserve original r28. */
regs->gr[28] = regs->orig_r28;
return;
}
default:
@ -570,30 +568,17 @@ do_signal(struct pt_regs *regs, long in_syscall)
DBG(1,"\ndo_signal: regs=0x%p, sr7 %#lx, in_syscall=%d\n",
regs, regs->sr[7], in_syscall);
/* Everyone else checks to see if they are in kernel mode at
this point and exits if that's the case. I'm not sure why
we would be called in that case, but for some reason we
are. */
/* May need to force signal if handle_signal failed to deliver */
while (1) {
signr = get_signal_to_deliver(&info, &ka, regs, NULL);
DBG(3,"do_signal: signr = %d, regs->gr[28] = %ld\n", signr, regs->gr[28]);
signr = get_signal_to_deliver(&info, &ka, regs, NULL);
DBG(3,"do_signal: signr = %d, regs->gr[28] = %ld\n", signr, regs->gr[28]);
if (signr <= 0)
break;
if (signr > 0) {
/* Restart a system call if necessary. */
if (in_syscall)
syscall_restart(regs, &ka);
/* Whee! Actually deliver the signal. If the
delivery failed, we need to continue to iterate in
this loop so we can deliver the SIGSEGV... */
if (handle_signal(signr, &info, &ka, regs, in_syscall))
return;
handle_signal(signr, &info, &ka, regs, in_syscall);
return;
}
/* end of while(1) looping forever if we can't force a signal */
/* Did we come from a system call? */
if (in_syscall)

9
arch/parisc/kernel/syscall.S
View File

@ -156,7 +156,7 @@ linux_gateway_entry:
STREG %r26, TASK_PT_GR26(%r1) /* 1st argument */
STREG %r27, TASK_PT_GR27(%r1) /* user dp */
STREG %r28, TASK_PT_GR28(%r1) /* return value 0 */
STREG %r28, TASK_PT_ORIG_R28(%r1) /* return value 0 (saved for signals) */
STREG %r0, TASK_PT_ORIG_R28(%r1) /* don't prohibit restarts */
STREG %r29, TASK_PT_GR29(%r1) /* return value 1 */
STREG %r31, TASK_PT_GR31(%r1) /* preserve syscall return ptr */
@ -180,9 +180,10 @@ linux_gateway_entry:
/* Are we being ptraced? */
mfctl %cr30, %r1
LDREG TI_TASK(%r1),%r1
ldw TASK_PTRACE(%r1), %r1
bb,<,n %r1,31,.Ltracesys
LDREG TI_FLAGS(%r1),%r1
ldi _TIF_SYSCALL_TRACE_MASK, %r19
and,COND(=) %r1, %r19, %r0
b,n .Ltracesys
/* Note! We cannot use the syscall table that is mapped
nearby since the gateway page is mapped execute-only. */

1
arch/powerpc/Kconfig
View File

@ -141,6 +141,7 @@ config PPC
select GENERIC_CLOCKEVENTS
select GENERIC_STRNCPY_FROM_USER
select GENERIC_STRNLEN_USER
select GENERIC_KERNEL_THREAD
config EARLY_PRINTK
bool

3
arch/powerpc/include/asm/processor.h
View File

@ -74,9 +74,6 @@ struct task_struct;
void start_thread(struct pt_regs *regs, unsigned long fdptr, unsigned long sp);
void release_thread(struct task_struct *);
/* Create a new kernel thread. */
extern long kernel_thread(int (*fn)(void *), void *arg, unsigned long flags);
/* Lazy FPU handling on uni-processor */
extern struct task_struct *last_task_used_math;
extern struct task_struct *last_task_used_altivec;

2
arch/powerpc/include/asm/ptrace.h
View File

@ -125,6 +125,8 @@ extern unsigned long ptrace_get_reg(struct task_struct *task, int regno);
extern int ptrace_put_reg(struct task_struct *task, int regno,
unsigned long data);
#define current_pt_regs() \
((struct pt_regs *)((unsigned long)current_thread_info() + THREAD_SIZE) - 1)
/*
* We use the least-significant bit of the trap field to indicate
* whether we have saved the full set of registers, or only a

3
arch/powerpc/include/asm/syscalls.h
View File

@ -17,9 +17,6 @@ asmlinkage unsigned long sys_mmap(unsigned long addr, size_t len,
asmlinkage unsigned long sys_mmap2(unsigned long addr, size_t len,
unsigned long prot, unsigned long flags,
unsigned long fd, unsigned long pgoff);
asmlinkage int sys_execve(unsigned long a0, unsigned long a1,
unsigned long a2, unsigned long a3, unsigned long a4,
unsigned long a5, struct pt_regs *regs);
asmlinkage int sys_clone(unsigned long clone_flags, unsigned long usp,
int __user *parent_tidp, void __user *child_threadptr,
int __user *child_tidp, int p6, struct pt_regs *regs);

2
arch/powerpc/include/asm/thread_info.h
View File

@ -182,6 +182,8 @@ static inline bool test_thread_local_flags(unsigned int flags)
#define is_32bit_task() (1)
#endif
#define tsk_is_polling(t) test_tsk_thread_flag(t, TIF_POLLING_NRFLAG)
#endif /* !__ASSEMBLY__ */
#endif /* __KERNEL__ */

2
arch/powerpc/include/asm/unistd.h
View File

@ -421,6 +421,8 @@
#define __ARCH_WANT_SYS_NEWFSTATAT
#define __ARCH_WANT_COMPAT_SYS_SENDFILE
#endif
#define __ARCH_WANT_SYS_EXECVE
#define __ARCH_WANT_KERNEL_EXECVE
/*
* "Conditional" syscalls

16
arch/powerpc/kernel/entry_32.S
View File

@ -435,6 +435,22 @@ ret_from_fork:
li r3,0
b ret_from_syscall
.globl ret_from_kernel_thread
ret_from_kernel_thread:
REST_NVGPRS(r1)
bl schedule_tail
mtlr r14
mr r3,r15
PPC440EP_ERR42
blrl
li r3,0
b do_exit # no return
.globl __ret_from_kernel_execve
__ret_from_kernel_execve:
addi r1,r3,-STACK_FRAME_OVERHEAD
b ret_from_syscall
/* Traced system call support */
syscall_dotrace:
SAVE_NVGPRS(r1)

16
arch/powerpc/kernel/entry_64.S
View File

@ -370,6 +370,22 @@ _GLOBAL(ret_from_fork)
li r3,0
b syscall_exit
_GLOBAL(ret_from_kernel_thread)
bl .schedule_tail
REST_NVGPRS(r1)
REST_GPR(2,r1)
mtlr r14
mr r3,r15
blrl
li r3,0
b .do_exit # no return
_GLOBAL(__ret_from_kernel_execve)
addi r1,r3,-STACK_FRAME_OVERHEAD
li r10,1
std r10,SOFTE(r1)
b syscall_exit
.section ".toc","aw"
DSCR_DEFAULT:
.tc dscr_default[TC],dscr_default

7
arch/powerpc/kernel/misc.S
View File

@ -54,13 +54,6 @@ _GLOBAL(add_reloc_offset)
.align 3
2: PPC_LONG 1b
_GLOBAL(kernel_execve)
li r0,__NR_execve
sc
bnslr
neg r3,r3
blr
_GLOBAL(setjmp)
mflr r0
PPC_STL r0,0(r3)

33
arch/powerpc/kernel/misc_32.S
View File

@ -663,39 +663,6 @@ _GLOBAL(abs)
sub r3,r3,r4
blr
/*
* Create a kernel thread
* kernel_thread(fn, arg, flags)
*/
_GLOBAL(kernel_thread)
stwu r1,-16(r1)
stw r30,8(r1)
stw r31,12(r1)
mr r30,r3 /* function */
mr r31,r4 /* argument */
ori r3,r5,CLONE_VM /* flags */
oris r3,r3,CLONE_UNTRACED>>16
li r4,0 /* new sp (unused) */
li r0,__NR_clone
sc
bns+ 1f /* did system call indicate error? */
neg r3,r3 /* if so, make return code negative */
1: cmpwi 0,r3,0 /* parent or child? */
bne 2f /* return if parent */
li r0,0 /* make top-level stack frame */
stwu r0,-16(r1)
mtlr r30 /* fn addr in lr */
mr r3,r31 /* load arg and call fn */
PPC440EP_ERR42
blrl
li r0,__NR_exit /* exit if function returns */
li r3,0
sc
2: lwz r30,8(r1)
lwz r31,12(r1)
addi r1,r1,16
blr
#ifdef CONFIG_SMP
_GLOBAL(start_secondary_resume)
/* Reset stack */

34
arch/powerpc/kernel/misc_64.S
View File

@ -406,40 +406,6 @@ _GLOBAL(scom970_write)
#endif /* CONFIG_CPU_FREQ_PMAC64 || CONFIG_CPU_FREQ_MAPLE */
/*
* Create a kernel thread
* kernel_thread(fn, arg, flags)
*/
_GLOBAL(kernel_thread)
std r29,-24(r1)
std r30,-16(r1)
stdu r1,-STACK_FRAME_OVERHEAD(r1)
mr r29,r3
mr r30,r4
ori r3,r5,CLONE_VM /* flags */
oris r3,r3,(CLONE_UNTRACED>>16)
li r4,0 /* new sp (unused) */
li r0,__NR_clone
sc
bns+ 1f /* did system call indicate error? */
neg r3,r3 /* if so, make return code negative */
1: cmpdi 0,r3,0 /* parent or child? */
bne 2f /* return if parent */
li r0,0
stdu r0,-STACK_FRAME_OVERHEAD(r1)
ld r2,8(r29)
ld r29,0(r29)
mtlr r29 /* fn addr in lr */
mr r3,r30 /* load arg and call fn */
blrl
li r0,__NR_exit /* exit after child exits */
li r3,0
sc
2: addi r1,r1,STACK_FRAME_OVERHEAD
ld r29,-24(r1)
ld r30,-16(r1)
blr
/*
* disable_kernel_fp()
* Disable the FPU.

1
arch/powerpc/kernel/ppc_ksyms.c
View File

@ -94,7 +94,6 @@ EXPORT_SYMBOL(pci_dram_offset);
#endif /* CONFIG_PCI */
EXPORT_SYMBOL(start_thread);
EXPORT_SYMBOL(kernel_thread);
EXPORT_SYMBOL(giveup_fpu);
#ifdef CONFIG_ALTIVEC

59
arch/powerpc/kernel/process.c
View File

@ -733,30 +733,39 @@ int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src)
extern unsigned long dscr_default; /* defined in arch/powerpc/kernel/sysfs.c */
int copy_thread(unsigned long clone_flags, unsigned long usp,
unsigned long unused, struct task_struct *p,
unsigned long arg, struct task_struct *p,
struct pt_regs *regs)
{
struct pt_regs *childregs, *kregs;
extern void ret_from_fork(void);
extern void ret_from_kernel_thread(void);
void (*f)(void);
unsigned long sp = (unsigned long)task_stack_page(p) + THREAD_SIZE;
CHECK_FULL_REGS(regs);
/* Copy registers */
sp -= sizeof(struct pt_regs);
childregs = (struct pt_regs *) sp;
*childregs = *regs;
if ((childregs->msr & MSR_PR) == 0) {
if (!regs) {
/* for kernel thread, set `current' and stackptr in new task */
memset(childregs, 0, sizeof(struct pt_regs));
childregs->gpr[1] = sp + sizeof(struct pt_regs);
#ifdef CONFIG_PPC32
childregs->gpr[2] = (unsigned long) p;
#else
#ifdef CONFIG_PPC64
childregs->gpr[14] = *(unsigned long *)usp;
childregs->gpr[2] = ((unsigned long *)usp)[1],
clear_tsk_thread_flag(p, TIF_32BIT);
#else
childregs->gpr[14] = usp; /* function */
childregs->gpr[2] = (unsigned long) p;
#endif
childregs->gpr[15] = arg;
p->thread.regs = NULL; /* no user register state */
f = ret_from_kernel_thread;
} else {
CHECK_FULL_REGS(regs);
*childregs = *regs;
childregs->gpr[1] = usp;
p->thread.regs = childregs;
childregs->gpr[3] = 0; /* Result from fork() */
if (clone_flags & CLONE_SETTLS) {
#ifdef CONFIG_PPC64
if (!is_32bit_task())
@ -765,8 +774,9 @@ int copy_thread(unsigned long clone_flags, unsigned long usp,
#endif
childregs->gpr[2] = childregs->gpr[6];
}
f = ret_from_fork;
}
childregs->gpr[3] = 0; /* Result from fork() */
sp -= STACK_FRAME_OVERHEAD;
/*
@ -805,19 +815,17 @@ int copy_thread(unsigned long clone_flags, unsigned long usp,
p->thread.dscr = current->thread.dscr;
}
#endif
/*
* The PPC64 ABI makes use of a TOC to contain function
* pointers. The function (ret_from_except) is actually a pointer
* to the TOC entry. The first entry is a pointer to the actual
* function.
*/
*/
#ifdef CONFIG_PPC64
kregs->nip = *((unsigned long *)ret_from_fork);
kregs->nip = *((unsigned long *)f);
#else
kregs->nip = (unsigned long)ret_from_fork;
kregs->nip = (unsigned long)f;
#endif
return 0;
}
@ -1055,26 +1063,13 @@ int sys_vfork(unsigned long p1, unsigned long p2, unsigned long p3,
regs, 0, NULL, NULL);
}
int sys_execve(unsigned long a0, unsigned long a1, unsigned long a2,
unsigned long a3, unsigned long a4, unsigned long a5,
struct pt_regs *regs)
{
int error;
char *filename;
void __ret_from_kernel_execve(struct pt_regs *normal)
__noreturn;
filename = getname((const char __user *) a0);
error = PTR_ERR(filename);
if (IS_ERR(filename))
goto out;
flush_fp_to_thread(current);
flush_altivec_to_thread(current);
flush_spe_to_thread(current);
error = do_execve(filename,
(const char __user *const __user *) a1,
(const char __user *const __user *) a2, regs);
putname(filename);
out:
return error;
void ret_from_kernel_execve(struct pt_regs *normal)
{
set_thread_flag(TIF_RESTOREALL);
__ret_from_kernel_execve(normal);
}
static inline int valid_irq_stack(unsigned long sp, struct task_struct *p,

1
arch/powerpc/kernel/signal_32.c
View File

@ -35,7 +35,6 @@
#include <linux/stddef.h>
#include <linux/tty.h>
#include <linux/binfmts.h>
#include <linux/freezer.h>
#endif
#include <asm/uaccess.h>

22
arch/powerpc/kernel/sys_ppc32.c
View File

@ -156,28 +156,6 @@ asmlinkage long compat_sys_sendfile64_wrapper(u32 out_fd, u32 in_fd,
(off_t __user *)offset, count);
}
long compat_sys_execve(unsigned long a0, unsigned long a1, unsigned long a2,
unsigned long a3, unsigned long a4, unsigned long a5,
struct pt_regs *regs)
{
int error;
char * filename;
filename = getname((char __user *) a0);
error = PTR_ERR(filename);
if (IS_ERR(filename))
goto out;
flush_fp_to_thread(current);
flush_altivec_to_thread(current);
error = compat_do_execve(filename, compat_ptr(a1), compat_ptr(a2), regs);
putname(filename);
out:
return error;
}
/* Note: it is necessary to treat option as an unsigned int,
* with the corresponding cast to a signed int to insure that the
* proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)

4
arch/s390/include/asm/thread_info.h
View File

@ -91,8 +91,6 @@ static inline struct thread_info *current_thread_info(void)
#define TIF_SYSCALL_AUDIT 9 /* syscall auditing active */
#define TIF_SECCOMP 10 /* secure computing */
#define TIF_SYSCALL_TRACEPOINT 11 /* syscall tracepoint instrumentation */
#define TIF_POLLING_NRFLAG 16 /* true if poll_idle() is polling
TIF_NEED_RESCHED */
#define TIF_31BIT 17 /* 32bit process */
#define TIF_MEMDIE 18 /* is terminating due to OOM killer */
#define TIF_RESTORE_SIGMASK 19 /* restore signal mask in do_signal() */
@ -100,7 +98,6 @@ static inline struct thread_info *current_thread_info(void)
#define _TIF_SYSCALL (1<<TIF_SYSCALL)
#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
#define _TIF_RESTORE_SIGMASK (1<<TIF_RESTORE_SIGMASK)
#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
#define _TIF_PER_TRAP (1<<TIF_PER_TRAP)
@ -109,7 +106,6 @@ static inline struct thread_info *current_thread_info(void)
#define _TIF_SYSCALL_AUDIT (1<<TIF_SYSCALL_AUDIT)
#define _TIF_SECCOMP (1<<TIF_SECCOMP)
#define _TIF_SYSCALL_TRACEPOINT (1<<TIF_SYSCALL_TRACEPOINT)
#define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
#define _TIF_31BIT (1<<TIF_31BIT)
#define _TIF_SINGLE_STEP (1<<TIF_SINGLE_STEP)

4
arch/score/include/asm/thread_info.h
View File

@ -86,16 +86,12 @@ register struct thread_info *__current_thread_info __asm__("r28");
#define TIF_NEED_RESCHED 2 /* rescheduling necessary */
#define TIF_NOTIFY_RESUME 5 /* callback before returning to user */
#define TIF_RESTORE_SIGMASK 9 /* restore signal mask in do_signal() */
#define TIF_POLLING_NRFLAG 17 /* true if poll_idle() is polling
TIF_NEED_RESCHED */
#define TIF_MEMDIE 18 /* is terminating due to OOM killer */
#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
#define _TIF_RESTORE_SIGMASK (1<<TIF_RESTORE_SIGMASK)
#define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
#define _TIF_WORK_MASK (0x0000ffff)

1
arch/score/kernel/signal.c
View File

@ -174,6 +174,7 @@ score_rt_sigreturn(struct pt_regs *regs)
/* It is more difficult to avoid calling this function than to
call it and ignore errors. */
do_sigaltstack((stack_t __user *)&st, NULL, regs->regs[0]);
regs->is_syscall = 0;
__asm__ __volatile__(
"mv\tr0, %0\n\t"

3
arch/sh/include/asm/thread_info.h
View File

@ -206,6 +206,9 @@ static inline bool test_and_clear_restore_sigmask(void)
ti->status &= ~TS_RESTORE_SIGMASK;
return true;
}
#define tsk_is_polling(t) test_tsk_thread_flag(t, TIF_POLLING_NRFLAG)
#endif /* !__ASSEMBLY__ */
#endif /* __KERNEL__ */

1
arch/sh/kernel/signal_32.c
View File

@ -22,7 +22,6 @@
#include <linux/elf.h>
#include <linux/personality.h>
#include <linux/binfmts.h>
#include <linux/freezer.h>
#include <linux/io.h>
#include <linux/tracehook.h>
#include <asm/ucontext.h>

1
arch/sh/kernel/signal_64.c
View File

@ -18,7 +18,6 @@
#include <linux/errno.h>
#include <linux/wait.h>
#include <linux/personality.h>
#include <linux/freezer.h>
#include <linux/ptrace.h>
#include <linux/unistd.h>
#include <linux/stddef.h>

3
arch/sparc/include/asm/thread_info_32.h
View File

@ -126,13 +126,14 @@ register struct thread_info *current_thread_info_reg asm("g6");
#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
#define _TIF_RESTORE_SIGMASK (1<<TIF_RESTORE_SIGMASK)
#define _TIF_USEDFPU (1<<TIF_USEDFPU)
#define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
#define _TIF_DO_NOTIFY_RESUME_MASK (_TIF_NOTIFY_RESUME | \
_TIF_SIGPENDING)
#define tsk_is_polling(t) test_tsk_thread_flag(t, TIF_POLLING_NRFLAG)
#endif /* __KERNEL__ */
#endif /* _ASM_THREAD_INFO_H */

3
arch/sparc/include/asm/thread_info_64.h
View File

@ -256,6 +256,9 @@ static inline bool test_and_clear_restore_sigmask(void)
ti->status &= ~TS_RESTORE_SIGMASK;
return true;
}
#define tsk_is_polling(t) test_tsk_thread_flag(t, TIF_POLLING_NRFLAG)
#endif /* !__ASSEMBLY__ */
#endif /* __KERNEL__ */

9
arch/tile/kernel/compat_signal.c
View File

@ -354,15 +354,6 @@ int compat_setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
regs->regs[1] = ptr_to_compat_reg(&frame->info);
regs->regs[2] = ptr_to_compat_reg(&frame->uc);
regs->flags |= PT_FLAGS_CALLER_SAVES;
/*
* Notify any tracer that was single-stepping it.
* The tracer may want to single-step inside the
* handler too.
*/
if (test_thread_flag(TIF_SINGLESTEP))
ptrace_notify(SIGTRAP);
return 0;
give_sigsegv:

12
arch/tile/kernel/signal.c
View File

@ -219,15 +219,6 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
regs->regs[1] = (unsigned long) &frame->info;
regs->regs[2] = (unsigned long) &frame->uc;
regs->flags |= PT_FLAGS_CALLER_SAVES;
/*
* Notify any tracer that was single-stepping it.
* The tracer may want to single-step inside the
* handler too.
*/
if (test_thread_flag(TIF_SINGLESTEP))
ptrace_notify(SIGTRAP);
return 0;
give_sigsegv:
@ -278,7 +269,8 @@ static void handle_signal(unsigned long sig, siginfo_t *info,
ret = setup_rt_frame(sig, ka, info, oldset, regs);
if (ret)
return;
signal_delivered(sig, info, ka, regs, 0);
signal_delivered(sig, info, ka, regs,
test_thread_flag(TIF_SINGLESTEP));
}
/*

3
arch/um/include/asm/thread_info.h
View File

@ -65,8 +65,6 @@ static inline struct thread_info *current_thread_info(void)
#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
#define TIF_SIGPENDING 1 /* signal pending */
#define TIF_NEED_RESCHED 2 /* rescheduling necessary */
#define TIF_POLLING_NRFLAG 3 /* true if poll_idle() is polling
* TIF_NEED_RESCHED */
#define TIF_RESTART_BLOCK 4
#define TIF_MEMDIE 5 /* is terminating due to OOM killer */
#define TIF_SYSCALL_AUDIT 6
@ -76,7 +74,6 @@ static inline struct thread_info *current_thread_info(void)
#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
#define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG)
#define _TIF_MEMDIE (1 << TIF_MEMDIE)
#define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT)

4
arch/unicore32/include/asm/thread_info.h
View File

@ -141,12 +141,12 @@ static inline struct thread_info *current_thread_info(void)
#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
#define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME)
#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
#define _TIF_RESTORE_SIGMASK (1 << TIF_RESTORE_SIGMASK)
/*
* Change these and you break ASM code in entry-common.S
*/
#define _TIF_WORK_MASK 0x000000ff
#define _TIF_WORK_MASK \
(_TIF_SIGPENDING | _TIF_NEED_RESCHED | _TIF_NOTIFY_RESUME)
#endif /* __KERNEL__ */
#endif /* __UNICORE_THREAD_INFO_H__ */

2
arch/unicore32/kernel/entry.S
View File

@ -544,8 +544,6 @@ fast_work_pending:
work_pending:
cand.a r1, #_TIF_NEED_RESCHED
bne work_resched
cand.a r1, #_TIF_SIGPENDING|_TIF_NOTIFY_RESUME
beq no_work_pending
mov r0, sp @ 'regs'
mov r2, why @ 'syscall'
cand.a r1, #_TIF_SIGPENDING @ delivering a signal?

1
arch/unicore32/kernel/signal.c
View File

@ -12,7 +12,6 @@
#include <linux/errno.h>
#include <linux/signal.h>
#include <linux/personality.h>
#include <linux/freezer.h>
#include <linux/uaccess.h>
#include <linux/tracehook.h>
#include <linux/elf.h>

27
arch/x86/kernel/entry_32.S
View File

@ -622,22 +622,7 @@ work_notifysig: # deal with pending signals and
movl %esp, %eax
jne work_notifysig_v86 # returning to kernel-space or
# vm86-space
TRACE_IRQS_ON
ENABLE_INTERRUPTS(CLBR_NONE)
movb PT_CS(%esp), %bl
andb $SEGMENT_RPL_MASK, %bl
cmpb $USER_RPL, %bl
jb resume_kernel
xorl %edx, %edx
call do_notify_resume
jmp resume_userspace
ALIGN
work_notifysig_v86:
pushl_cfi %ecx # save ti_flags for do_notify_resume
call save_v86_state # %eax contains pt_regs pointer
popl_cfi %ecx
movl %eax, %esp
1:
#else
movl %esp, %eax
#endif
@ -650,6 +635,16 @@ work_notifysig_v86:
xorl %edx, %edx
call do_notify_resume
jmp resume_userspace
#ifdef CONFIG_VM86
ALIGN
work_notifysig_v86:
pushl_cfi %ecx # save ti_flags for do_notify_resume
call save_v86_state # %eax contains pt_regs pointer
popl_cfi %ecx
movl %eax, %esp
jmp 1b
#endif
END(work_pending)
# perform syscall exit tracing

5
arch/xtensa/include/asm/thread_info.h
View File

@ -128,19 +128,14 @@ static inline struct thread_info *current_thread_info(void)
#define TIF_SIGPENDING 1 /* signal pending */
#define TIF_NEED_RESCHED 2 /* rescheduling necessary */
#define TIF_SINGLESTEP 3 /* restore singlestep on return to user mode */
#define TIF_IRET 4 /* return with iret */
#define TIF_MEMDIE 5 /* is terminating due to OOM killer */
#define TIF_RESTORE_SIGMASK 6 /* restore signal mask in do_signal() */
#define TIF_NOTIFY_RESUME 7 /* callback before returning to user */
#define TIF_POLLING_NRFLAG 16 /* true if poll_idle() is polling TIF_NEED_RESCHED */
#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
#define _TIF_SINGLESTEP (1<<TIF_SINGLESTEP)
#define _TIF_IRET (1<<TIF_IRET)
#define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
#define _TIF_RESTORE_SIGMASK (1<<TIF_RESTORE_SIGMASK)
#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 */

4
arch/xtensa/kernel/signal.c
View File

@ -19,7 +19,6 @@
#include <linux/errno.h>
#include <linux/ptrace.h>
#include <linux/personality.h>
#include <linux/freezer.h>
#include <linux/tracehook.h>
#include <asm/ucontext.h>
@ -527,9 +526,6 @@ static void do_signal(struct pt_regs *regs)
void do_notify_resume(struct pt_regs *regs)
{
if (!user_mode(regs))
return;
if (test_thread_flag(TIF_SIGPENDING))
do_signal(regs);

2
kernel/sched/core.c
View File

@ -505,7 +505,7 @@ static inline void init_hrtick(void)
#ifdef CONFIG_SMP
#ifndef tsk_is_polling
#define tsk_is_polling(t) test_tsk_thread_flag(t, TIF_POLLING_NRFLAG)
#define tsk_is_polling(t) 0
#endif
void resched_task(struct task_struct *p)