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-rw-r--r--arch/alpha/kernel/alpha_ksyms.c3
-rw-r--r--arch/alpha/kernel/entry.S155
-rw-r--r--arch/alpha/kernel/osf_sys.c41
-rw-r--r--arch/alpha/kernel/pci-sysfs.c2
-rw-r--r--arch/alpha/kernel/process.c81
-rw-r--r--arch/alpha/kernel/ptrace.c32
-rw-r--r--arch/alpha/kernel/signal.c48
-rw-r--r--arch/alpha/kernel/traps.c6
8 files changed, 129 insertions, 239 deletions
diff --git a/arch/alpha/kernel/alpha_ksyms.c b/arch/alpha/kernel/alpha_ksyms.c
index 15fa821d09cd..89566b346c0f 100644
--- a/arch/alpha/kernel/alpha_ksyms.c
+++ b/arch/alpha/kernel/alpha_ksyms.c
@@ -50,9 +50,6 @@ EXPORT_SYMBOL(alpha_read_fp_reg_s);
EXPORT_SYMBOL(alpha_write_fp_reg);
EXPORT_SYMBOL(alpha_write_fp_reg_s);
-/* entry.S */
-EXPORT_SYMBOL(kernel_thread);
-
/* Networking helper routines. */
EXPORT_SYMBOL(csum_tcpudp_magic);
EXPORT_SYMBOL(ip_compute_csum);
diff --git a/arch/alpha/kernel/entry.S b/arch/alpha/kernel/entry.S
index ec0da0567ab5..a7607832dd4f 100644
--- a/arch/alpha/kernel/entry.S
+++ b/arch/alpha/kernel/entry.S
@@ -311,7 +311,7 @@ entSys:
.align 4
ret_from_sys_call:
- cmovne $26, 0, $19 /* $19 = 0 => non-restartable */
+ cmovne $26, 0, $18 /* $18 = 0 => non-restartable */
ldq $0, SP_OFF($sp)
and $0, 8, $0
beq $0, ret_to_kernel
@@ -320,8 +320,8 @@ ret_to_user:
sampling and the rti. */
lda $16, 7
call_pal PAL_swpipl
- ldl $5, TI_FLAGS($8)
- and $5, _TIF_WORK_MASK, $2
+ ldl $17, TI_FLAGS($8)
+ and $17, _TIF_WORK_MASK, $2
bne $2, work_pending
restore_all:
RESTORE_ALL
@@ -341,10 +341,10 @@ $syscall_error:
* frame to indicate that a negative return value wasn't an
* error number..
*/
- ldq $19, 0($sp) /* old syscall nr (zero if success) */
- beq $19, $ret_success
+ ldq $18, 0($sp) /* old syscall nr (zero if success) */
+ beq $18, $ret_success
- ldq $20, 72($sp) /* .. and this a3 */
+ ldq $19, 72($sp) /* .. and this a3 */
subq $31, $0, $0 /* with error in v0 */
addq $31, 1, $1 /* set a3 for errno return */
stq $0, 0($sp)
@@ -362,51 +362,35 @@ $ret_success:
* Do all cleanup when returning from all interrupts and system calls.
*
* Arguments:
- * $5: TI_FLAGS.
* $8: current.
- * $19: The old syscall number, or zero if this is not a return
+ * $17: TI_FLAGS.
+ * $18: The old syscall number, or zero if this is not a return
* from a syscall that errored and is possibly restartable.
- * $20: The old a3 value
+ * $19: The old a3 value
*/
.align 4
.ent work_pending
work_pending:
- and $5, _TIF_NEED_RESCHED, $2
- beq $2, $work_notifysig
+ and $17, _TIF_NOTIFY_RESUME | _TIF_SIGPENDING, $2
+ bne $2, $work_notifysig
$work_resched:
- subq $sp, 16, $sp
- stq $19, 0($sp) /* save syscall nr */
- stq $20, 8($sp) /* and error indication (a3) */
+ /*
+ * We can get here only if we returned from syscall without SIGPENDING
+ * or got through work_notifysig already. Either case means no syscall
+ * restarts for us, so let $18 and $19 burn.
+ */
jsr $26, schedule
- ldq $19, 0($sp)
- ldq $20, 8($sp)
- addq $sp, 16, $sp
- /* Make sure need_resched and sigpending don't change between
- sampling and the rti. */
- lda $16, 7
- call_pal PAL_swpipl
- ldl $5, TI_FLAGS($8)
- and $5, _TIF_WORK_MASK, $2
- beq $2, restore_all
- and $5, _TIF_NEED_RESCHED, $2
- bne $2, $work_resched
+ mov 0, $18
+ br ret_to_user
$work_notifysig:
mov $sp, $16
bsr $1, do_switch_stack
- mov $sp, $17
- mov $5, $18
- mov $19, $9 /* save old syscall number */
- mov $20, $10 /* save old a3 */
- and $5, _TIF_SIGPENDING, $2
- cmovne $2, 0, $9 /* we don't want double syscall restarts */
- jsr $26, do_notify_resume
- mov $9, $19
- mov $10, $20
+ jsr $26, do_work_pending
bsr $1, undo_switch_stack
- br ret_to_user
+ br restore_all
.end work_pending
/*
@@ -418,11 +402,10 @@ $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)
@@ -449,15 +432,15 @@ $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
.align 3
$strace_error:
- ldq $19, 0($sp) /* old syscall nr (zero if success) */
- beq $19, $strace_success
- ldq $20, 72($sp) /* .. and this a3 */
+ ldq $18, 0($sp) /* old syscall nr (zero if success) */
+ beq $18, $strace_success
+ ldq $19, 72($sp) /* .. and this a3 */
subq $31, $0, $0 /* with error in v0 */
addq $31, 1, $1 /* set a3 for errno return */
@@ -465,11 +448,11 @@ $strace_error:
stq $1, 72($sp) /* a3 for return */
bsr $1, do_switch_stack
- mov $19, $9 /* save old syscall number */
- mov $20, $10 /* save old a3 */
- jsr $26, syscall_trace
- mov $9, $19
- mov $10, $20
+ mov $18, $9 /* save old syscall number */
+ mov $19, $10 /* save old a3 */
+ jsr $26, syscall_trace_leave
+ mov $9, $18
+ mov $10, $19
bsr $1, undo_switch_stack
mov $31, $26 /* tell "ret_from_sys_call" we can restart */
@@ -609,59 +592,20 @@ ret_from_fork:
.end ret_from_fork
/*
- * kernel_thread(fn, arg, clone_flags)
+ * ... and new kernel threads - here
*/
.align 4
- .globl kernel_thread
- .ent kernel_thread
-kernel_thread:
- /* We can be called from a module. */
- ldgp $gp, 0($27)
- .prologue 1
- subq $sp, SP_OFF+6*8, $sp
- br $1, 2f /* load start address */
-
- /* We've now "returned" from a fake system call. */
- unop
- blt $0, 1f /* error? */
- ldi $1, 0x3fff
- beq $20, 1f /* parent or child? */
-
- bic $sp, $1, $8 /* in child. */
- jsr $26, ($27)
- ldgp $gp, 0($26)
- mov $0, $16
- mov $31, $26
- jmp $31, sys_exit
-
-1: ret /* in parent. */
-
- .align 4
-2: /* Fake a system call stack frame, as we can't do system calls
- from kernel space. Note that we store FN and ARG as they
- need to be set up in the child for the call. Also store $8
- and $26 for use in the parent. */
- stq $31, SP_OFF($sp) /* ps */
- stq $1, SP_OFF+8($sp) /* pc */
- stq $gp, SP_OFF+16($sp) /* gp */
- stq $16, 136($sp) /* $27; FN for child */
- stq $17, SP_OFF+24($sp) /* $16; ARG for child */
- stq $8, 64($sp) /* $8 */
- stq $26, 128($sp) /* $26 */
- /* Avoid the HAE being gratuitously wrong, to avoid restoring it. */
- ldq $2, alpha_mv+HAE_CACHE
- stq $2, 152($sp) /* HAE */
-
- /* Shuffle FLAGS to the front; add CLONE_VM. */
- ldi $1, CLONE_VM|CLONE_UNTRACED
- or $18, $1, $16
- bsr $26, sys_clone
-
- /* We don't actually care for a3 success widgetry in the kernel.
- Not for positive errno values. */
- stq $0, 0($sp) /* $0 */
- br ret_to_kernel
-.end kernel_thread
+ .globl ret_from_kernel_thread
+ .ent ret_from_kernel_thread
+ret_from_kernel_thread:
+ mov $17, $16
+ jsr $26, schedule_tail
+ mov $9, $27
+ mov $10, $16
+ jsr $26, ($9)
+ mov $31, $19 /* to disable syscall restarts */
+ br $31, ret_to_user
+.end ret_from_kernel_thread
/*
@@ -722,7 +666,7 @@ 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
@@ -739,21 +683,12 @@ 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
.align 4
- .globl sys_execve
- .ent sys_execve
-sys_execve:
- .prologue 0
- mov $sp, $19
- jmp $31, do_sys_execve
-.end sys_execve
-
- .align 4
.globl alpha_ni_syscall
.ent alpha_ni_syscall
alpha_ni_syscall:
diff --git a/arch/alpha/kernel/osf_sys.c b/arch/alpha/kernel/osf_sys.c
index 63e77e3944ce..1e6956a90608 100644
--- a/arch/alpha/kernel/osf_sys.c
+++ b/arch/alpha/kernel/osf_sys.c
@@ -449,7 +449,7 @@ osf_ufs_mount(char *dirname, struct ufs_args __user *args, int flags)
{
int retval;
struct cdfs_args tmp;
- char *devname;
+ struct filename *devname;
retval = -EFAULT;
if (copy_from_user(&tmp, args, sizeof(tmp)))
@@ -458,7 +458,7 @@ osf_ufs_mount(char *dirname, struct ufs_args __user *args, int flags)
retval = PTR_ERR(devname);
if (IS_ERR(devname))
goto out;
- retval = do_mount(devname, dirname, "ext2", flags, NULL);
+ retval = do_mount(devname->name, dirname, "ext2", flags, NULL);
putname(devname);
out:
return retval;
@@ -469,7 +469,7 @@ osf_cdfs_mount(char *dirname, struct cdfs_args __user *args, int flags)
{
int retval;
struct cdfs_args tmp;
- char *devname;
+ struct filename *devname;
retval = -EFAULT;
if (copy_from_user(&tmp, args, sizeof(tmp)))
@@ -478,7 +478,7 @@ osf_cdfs_mount(char *dirname, struct cdfs_args __user *args, int flags)
retval = PTR_ERR(devname);
if (IS_ERR(devname))
goto out;
- retval = do_mount(devname, dirname, "iso9660", flags, NULL);
+ retval = do_mount(devname->name, dirname, "iso9660", flags, NULL);
putname(devname);
out:
return retval;
@@ -499,7 +499,7 @@ SYSCALL_DEFINE4(osf_mount, unsigned long, typenr, const char __user *, path,
int, flag, void __user *, data)
{
int retval;
- char *name;
+ struct filename *name;
name = getname(path);
retval = PTR_ERR(name);
@@ -507,13 +507,13 @@ SYSCALL_DEFINE4(osf_mount, unsigned long, typenr, const char __user *, path,
goto out;
switch (typenr) {
case 1:
- retval = osf_ufs_mount(name, data, flag);
+ retval = osf_ufs_mount(name->name, data, flag);
break;
case 6:
- retval = osf_cdfs_mount(name, data, flag);
+ retval = osf_cdfs_mount(name->name, data, flag);
break;
case 9:
- retval = osf_procfs_mount(name, data, flag);
+ retval = osf_procfs_mount(name->name, data, flag);
break;
default:
retval = -EINVAL;
@@ -793,8 +793,7 @@ SYSCALL_DEFINE5(osf_getsysinfo, unsigned long, op, void __user *, buffer,
case GSI_UACPROC:
if (nbytes < sizeof(unsigned int))
return -EINVAL;
- w = (current_thread_info()->flags >> ALPHA_UAC_SHIFT) &
- UAC_BITMASK;
+ w = current_thread_info()->status & UAC_BITMASK;
if (put_user(w, (unsigned int __user *)buffer))
return -EFAULT;
return 1;
@@ -904,24 +903,20 @@ SYSCALL_DEFINE5(osf_setsysinfo, unsigned long, op, void __user *, buffer,
break;
case SSI_NVPAIRS: {
- unsigned long v, w, i;
- unsigned int old, new;
+ unsigned __user *p = buffer;
+ unsigned i;
- for (i = 0; i < nbytes; ++i) {
+ for (i = 0, p = buffer; i < nbytes; ++i, p += 2) {
+ unsigned v, w, status;
- if (get_user(v, 2*i + (unsigned int __user *)buffer))
- return -EFAULT;
- if (get_user(w, 2*i + 1 + (unsigned int __user *)buffer))
+ if (get_user(v, p) || get_user(w, p + 1))
return -EFAULT;
switch (v) {
case SSIN_UACPROC:
- again:
- old = current_thread_info()->flags;
- new = old & ~(UAC_BITMASK << ALPHA_UAC_SHIFT);
- new = new | (w & UAC_BITMASK) << ALPHA_UAC_SHIFT;
- if (cmpxchg(&current_thread_info()->flags,
- old, new) != old)
- goto again;
+ w &= UAC_BITMASK;
+ status = current_thread_info()->status;
+ status = (status & ~UAC_BITMASK) | w;
+ current_thread_info()->status = status;
break;
default:
diff --git a/arch/alpha/kernel/pci-sysfs.c b/arch/alpha/kernel/pci-sysfs.c
index 53649c7d0068..b51f7b4818cd 100644
--- a/arch/alpha/kernel/pci-sysfs.c
+++ b/arch/alpha/kernel/pci-sysfs.c
@@ -26,7 +26,7 @@ static int hose_mmap_page_range(struct pci_controller *hose,
base = sparse ? hose->sparse_io_base : hose->dense_io_base;
vma->vm_pgoff += base >> PAGE_SHIFT;
- vma->vm_flags |= (VM_IO | VM_RESERVED);
+ vma->vm_flags |= VM_IO | VM_DONTEXPAND | VM_DONTDUMP;
return io_remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff,
vma->vm_end - vma->vm_start,
diff --git a/arch/alpha/kernel/process.c b/arch/alpha/kernel/process.c
index 83638aa096d5..51987dcf79b8 100644
--- a/arch/alpha/kernel/process.c
+++ b/arch/alpha/kernel/process.c
@@ -49,7 +49,7 @@ EXPORT_SYMBOL(pm_power_off);
void
cpu_idle(void)
{
- set_thread_flag(TIF_POLLING_NRFLAG);
+ current_thread_info()->status |= TS_POLLING;
while (1) {
/* FIXME -- EV6 and LCA45 know how to power down
@@ -263,33 +263,35 @@ alpha_vfork(struct pt_regs *regs)
/*
* Copy an alpha thread..
- *
- * Note the "stack_offset" stuff: when returning to kernel mode, we need
- * to have some extra stack-space for the kernel stack that still exists
- * after the "ret_from_fork". When returning to user mode, we only want
- * the space needed by the syscall stack frame (ie "struct pt_regs").
- * Use the passed "regs" pointer to determine how much space we need
- * for a kernel fork().
*/
int
copy_thread(unsigned long clone_flags, unsigned long usp,
- unsigned long unused,
+ unsigned long arg,
struct task_struct * p, struct pt_regs * regs)
{
extern void ret_from_fork(void);
+ extern void ret_from_kernel_thread(void);
struct thread_info *childti = task_thread_info(p);
- struct pt_regs * childregs;
- struct switch_stack * childstack, *stack;
- unsigned long stack_offset, settls;
-
- stack_offset = PAGE_SIZE - sizeof(struct pt_regs);
- if (!(regs->ps & 8))
- stack_offset = (PAGE_SIZE-1) & (unsigned long) regs;
- childregs = (struct pt_regs *)
- (stack_offset + PAGE_SIZE + task_stack_page(p));
-
+ struct pt_regs *childregs = task_pt_regs(p);
+ struct switch_stack *childstack, *stack;
+ unsigned long settls;
+
+ childstack = ((struct switch_stack *) childregs) - 1;
+ if (unlikely(!regs)) {
+ /* kernel thread */
+ memset(childstack, 0,
+ sizeof(struct switch_stack) + sizeof(struct pt_regs));
+ childstack->r26 = (unsigned long) ret_from_kernel_thread;
+ childstack->r9 = usp; /* function */
+ childstack->r10 = arg;
+ childregs->hae = alpha_mv.hae_cache,
+ childti->pcb.usp = 0;
+ childti->pcb.ksp = (unsigned long) childstack;
+ childti->pcb.flags = 1; /* set FEN, clear everything else */
+ return 0;
+ }
*childregs = *regs;
settls = regs->r20;
childregs->r0 = 0;
@@ -297,7 +299,6 @@ copy_thread(unsigned long clone_flags, unsigned long usp,
childregs->r20 = 1; /* OSF/1 has some strange fork() semantics. */
regs->r20 = 0;
stack = ((struct switch_stack *) regs) - 1;
- childstack = ((struct switch_stack *) childregs) - 1;
*childstack = *stack;
childstack->r26 = (unsigned long) ret_from_fork;
childti->pcb.usp = usp;
@@ -386,27 +387,6 @@ dump_elf_task_fp(elf_fpreg_t *dest, struct task_struct *task)
EXPORT_SYMBOL(dump_elf_task_fp);
/*
- * sys_execve() executes a new program.
- */
-asmlinkage int
-do_sys_execve(const char __user *ufilename,
- const char __user *const __user *argv,
- const char __user *const __user *envp, struct pt_regs *regs)
-{
- int error;
- char *filename;
-
- filename = getname(ufilename);
- error = PTR_ERR(filename);
- if (IS_ERR(filename))
- goto out;
- error = do_execve(filename, argv, envp, regs);
- putname(filename);
-out:
- return error;
-}
-
-/*
* Return saved PC of a blocked thread. This assumes the frame
* pointer is the 6th saved long on the kernel stack and that the
* saved return address is the first long in the frame. This all
@@ -459,22 +439,3 @@ get_wchan(struct task_struct *p)
}
return pc;
}
-
-int kernel_execve(const char *path, const char *const argv[], const char *const envp[])
-{
- /* Avoid the HAE being gratuitously wrong, which would cause us
- to do the whole turn off interrupts thing and restore it. */
- struct pt_regs regs = {.hae = alpha_mv.hae_cache};
- int err = do_execve(path, argv, envp, &regs);
- if (!err) {
- struct pt_regs *p = current_pt_regs();
- /* copy regs to normal position and off to userland we go... */
- *p = regs;
- __asm__ __volatile__ (
- "mov %0, $sp;"
- "br $31, ret_from_sys_call"
- : : "r"(p));
- }
- return err;
-}
-EXPORT_SYMBOL(kernel_execve);
diff --git a/arch/alpha/kernel/ptrace.c b/arch/alpha/kernel/ptrace.c
index 54616f496aed..2a4a80ff4a20 100644
--- a/arch/alpha/kernel/ptrace.c
+++ b/arch/alpha/kernel/ptrace.c
@@ -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 unsigned long syscall_trace_enter(void)
+{
+ 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(void)
+syscall_trace_leave(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;
- }
+ if (test_thread_flag(TIF_SYSCALL_TRACE))
+ tracehook_report_syscall_exit(current_pt_regs(), 0);
}
diff --git a/arch/alpha/kernel/signal.c b/arch/alpha/kernel/signal.c
index a8c97d42ec8e..32575f85507d 100644
--- a/arch/alpha/kernel/signal.c
+++ b/arch/alpha/kernel/signal.c
@@ -298,8 +298,9 @@ get_sigframe(struct k_sigaction *ka, unsigned long sp, size_t frame_size)
static long
setup_sigcontext(struct sigcontext __user *sc, struct pt_regs *regs,
- struct switch_stack *sw, unsigned long mask, unsigned long sp)
+ unsigned long mask, unsigned long sp)
{
+ struct switch_stack *sw = (struct switch_stack *)regs - 1;
long i, err = 0;
err |= __put_user(on_sig_stack((unsigned long)sc), &sc->sc_onstack);
@@ -354,7 +355,7 @@ setup_sigcontext(struct sigcontext __user *sc, struct pt_regs *regs,
static int
setup_frame(int sig, struct k_sigaction *ka, sigset_t *set,
- struct pt_regs *regs, struct switch_stack * sw)
+ struct pt_regs *regs)
{
unsigned long oldsp, r26, err = 0;
struct sigframe __user *frame;
@@ -364,7 +365,7 @@ setup_frame(int sig, struct k_sigaction *ka, sigset_t *set,
if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
return -EFAULT;
- err |= setup_sigcontext(&frame->sc, regs, sw, set->sig[0], oldsp);
+ err |= setup_sigcontext(&frame->sc, regs, set->sig[0], oldsp);
if (err)
return -EFAULT;
@@ -401,7 +402,7 @@ setup_frame(int sig, struct k_sigaction *ka, sigset_t *set,
static int
setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
- sigset_t *set, struct pt_regs *regs, struct switch_stack * sw)
+ sigset_t *set, struct pt_regs *regs)
{
unsigned long oldsp, r26, err = 0;
struct rt_sigframe __user *frame;
@@ -420,7 +421,7 @@ setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
err |= __put_user(current->sas_ss_sp, &frame->uc.uc_stack.ss_sp);
err |= __put_user(sas_ss_flags(oldsp), &frame->uc.uc_stack.ss_flags);
err |= __put_user(current->sas_ss_size, &frame->uc.uc_stack.ss_size);
- err |= setup_sigcontext(&frame->uc.uc_mcontext, regs, sw,
+ err |= setup_sigcontext(&frame->uc.uc_mcontext, regs,
set->sig[0], oldsp);
err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
if (err)
@@ -464,15 +465,15 @@ setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
*/
static inline void
handle_signal(int sig, struct k_sigaction *ka, siginfo_t *info,
- struct pt_regs * regs, struct switch_stack *sw)
+ struct pt_regs * regs)
{
sigset_t *oldset = sigmask_to_save();
int ret;
if (ka->sa.sa_flags & SA_SIGINFO)
- ret = setup_rt_frame(sig, ka, info, oldset, regs, sw);
+ ret = setup_rt_frame(sig, ka, info, oldset, regs);
else
- ret = setup_frame(sig, ka, oldset, regs, sw);
+ ret = setup_frame(sig, ka, oldset, regs);
if (ret) {
force_sigsegv(sig, current);
@@ -519,8 +520,7 @@ syscall_restart(unsigned long r0, unsigned long r19,
* all (if we get here from anything but a syscall return, it will be 0)
*/
static void
-do_signal(struct pt_regs * regs, struct switch_stack * sw,
- unsigned long r0, unsigned long r19)
+do_signal(struct pt_regs *regs, unsigned long r0, unsigned long r19)
{
siginfo_t info;
int signr;
@@ -537,7 +537,7 @@ do_signal(struct pt_regs * regs, struct switch_stack * sw,
/* Whee! Actually deliver the signal. */
if (r0)
syscall_restart(r0, r19, regs, &ka);
- handle_signal(signr, &ka, &info, regs, sw);
+ handle_signal(signr, &ka, &info, regs);
if (single_stepping)
ptrace_set_bpt(current); /* re-set bpt */
return;
@@ -568,15 +568,23 @@ do_signal(struct pt_regs * regs, struct switch_stack * sw,
}
void
-do_notify_resume(struct pt_regs *regs, struct switch_stack *sw,
- unsigned long thread_info_flags,
+do_work_pending(struct pt_regs *regs, unsigned long thread_flags,
unsigned long r0, unsigned long r19)
{
- if (thread_info_flags & _TIF_SIGPENDING)
- do_signal(regs, sw, r0, r19);
-
- if (thread_info_flags & _TIF_NOTIFY_RESUME) {
- clear_thread_flag(TIF_NOTIFY_RESUME);
- tracehook_notify_resume(regs);
- }
+ do {
+ if (thread_flags & _TIF_NEED_RESCHED) {
+ schedule();
+ } else {
+ local_irq_enable();
+ if (thread_flags & _TIF_SIGPENDING) {
+ do_signal(regs, r0, r19);
+ r0 = 0;
+ } else {
+ clear_thread_flag(TIF_NOTIFY_RESUME);
+ tracehook_notify_resume(regs);
+ }
+ }
+ local_irq_disable();
+ thread_flags = current_thread_info()->flags;
+ } while (thread_flags & _TIF_WORK_MASK);
}
diff --git a/arch/alpha/kernel/traps.c b/arch/alpha/kernel/traps.c
index 80d987c0e9aa..272666d006df 100644
--- a/arch/alpha/kernel/traps.c
+++ b/arch/alpha/kernel/traps.c
@@ -780,17 +780,17 @@ do_entUnaUser(void __user * va, unsigned long opcode,
/* Check the UAC bits to decide what the user wants us to do
with the unaliged access. */
- if (!test_thread_flag (TIF_UAC_NOPRINT)) {
+ if (!(current_thread_info()->status & TS_UAC_NOPRINT)) {
if (__ratelimit(&ratelimit)) {
printk("%s(%d): unaligned trap at %016lx: %p %lx %ld\n",
current->comm, task_pid_nr(current),
regs->pc - 4, va, opcode, reg);
}
}
- if (test_thread_flag (TIF_UAC_SIGBUS))
+ if ((current_thread_info()->status & TS_UAC_SIGBUS))
goto give_sigbus;
/* Not sure why you'd want to use this, but... */
- if (test_thread_flag (TIF_UAC_NOFIX))
+ if ((current_thread_info()->status & TS_UAC_NOFIX))
return;
/* Don't bother reading ds in the access check since we already
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.