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

Bläddra i källkod 
Pull signal handling cleanups from Al Viro:
 "This is the first pile; another one will come a bit later and will
  contain SYSCALL_DEFINE-related patches.

   - a bunch of signal-related syscalls (both native and compat)
     unified.

   - a bunch of compat syscalls switched to COMPAT_SYSCALL_DEFINE
     (fixing several potential problems with missing argument
     validation, while we are at it)

   - a lot of now-pointless wrappers killed

   - a couple of architectures (cris and hexagon) forgot to save
     altstack settings into sigframe, even though they used the
     (uninitialized) values in sigreturn; fixed.

   - microblaze fixes for delivery of multiple signals arriving at once

   - saner set of helpers for signal delivery introduced, several
     architectures switched to using those."

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal: (143 commits)
  x86: convert to ksignal
  sparc: convert to ksignal
  arm: switch to struct ksignal * passing
  alpha: pass k_sigaction and siginfo_t using ksignal pointer
  burying unused conditionals
  make do_sigaltstack() static
  arm64: switch to generic old sigaction() (compat-only)
  arm64: switch to generic compat rt_sigaction()
  arm64: switch compat to generic old sigsuspend
  arm64: switch to generic compat rt_sigqueueinfo()
  arm64: switch to generic compat rt_sigpending()
  arm64: switch to generic compat rt_sigprocmask()
  arm64: switch to generic sigaltstack
  sparc: switch to generic old sigsuspend
  sparc: COMPAT_SYSCALL_DEFINE does all sign-extension as well as SYSCALL_DEFINE
  sparc: kill sign-extending wrappers for native syscalls
  kill sparc32_open()
  sparc: switch to use of generic old sigaction
  sparc: switch sys_compat_rt_sigaction() to COMPAT_SYSCALL_DEFINE
  mips: switch to generic sys_fork() and sys_clone()
  ...
This commit is contained in:
Linus Torvalds
2013-02-23 18:50:11 -08:00
förälder 5ce1a70e2f 235b80226b
incheckning 9e2d59ad58
185 ändrade filer med 1361 tillägg och 4823 borttagningar
Download Patch File Download Diff File Expand all files Collapse all files

1
arch/mips/Kconfig
Visa fil

@@ -40,6 +40,7 @@ config MIPS
select HAVE_MOD_ARCH_SPECIFIC
select MODULES_USE_ELF_REL if MODULES
select MODULES_USE_ELF_RELA if MODULES && 64BIT
select CLONE_BACKWARDS
menu "Machine selection"

8
arch/mips/include/asm/compat.h
Visa fil

@@ -288,6 +288,14 @@ struct compat_shmid64_ds {
compat_ulong_t __unused2;
};
/* MIPS has unusual order of fields in stack_t */
typedef struct compat_sigaltstack {
compat_uptr_t ss_sp;
compat_size_t ss_size;
int ss_flags;
} compat_stack_t;
#define compat_sigaltstack compat_sigaltstack
static inline int is_compat_task(void)
{
return test_thread_flag(TIF_32BIT_ADDR);

2
arch/mips/include/asm/signal.h
Visa fil

@@ -21,4 +21,6 @@
#include <asm/sigcontext.h>
#include <asm/siginfo.h>
#define __ARCH_HAS_ODD_SIGACTION
#endif /* _ASM_SIGNAL_H */

24
arch/mips/include/asm/sim.h
Visa fil

@@ -20,10 +20,10 @@
#define save_static_function(symbol) \
__asm__( \
".text\n\t" \
".globl\t" #symbol "\n\t" \
".globl\t__" #symbol "\n\t" \
".align\t2\n\t" \
".type\t" #symbol ", @function\n\t" \
".ent\t" #symbol ", 0\n" \
".type\t__" #symbol ", @function\n\t" \
".ent\t__" #symbol ", 0\n__" \
#symbol":\n\t" \
".frame\t$29, 0, $31\n\t" \
"sw\t$16,"__str(PT_R16)"($29)\t\t\t# save_static_function\n\t" \
@@ -35,9 +35,9 @@ __asm__( \
"sw\t$22,"__str(PT_R22)"($29)\n\t" \
"sw\t$23,"__str(PT_R23)"($29)\n\t" \
"sw\t$30,"__str(PT_R30)"($29)\n\t" \
"j\t_" #symbol "\n\t" \
".end\t" #symbol "\n\t" \
".size\t" #symbol",. - " #symbol)
"j\t" #symbol "\n\t" \
".end\t__" #symbol "\n\t" \
".size\t__" #symbol",. - __" #symbol)
#define nabi_no_regargs
@@ -48,10 +48,10 @@ __asm__( \
#define save_static_function(symbol) \
__asm__( \
".text\n\t" \
".globl\t" #symbol "\n\t" \
".globl\t__" #symbol "\n\t" \
".align\t2\n\t" \
".type\t" #symbol ", @function\n\t" \
".ent\t" #symbol ", 0\n" \
".type\t__" #symbol ", @function\n\t" \
".ent\t__" #symbol ", 0\n__" \
#symbol":\n\t" \
".frame\t$29, 0, $31\n\t" \
"sd\t$16,"__str(PT_R16)"($29)\t\t\t# save_static_function\n\t" \
@@ -63,9 +63,9 @@ __asm__( \
"sd\t$22,"__str(PT_R22)"($29)\n\t" \
"sd\t$23,"__str(PT_R23)"($29)\n\t" \
"sd\t$30,"__str(PT_R30)"($29)\n\t" \
"j\t_" #symbol "\n\t" \
".end\t" #symbol "\n\t" \
".size\t" #symbol",. - " #symbol)
"j\t" #symbol "\n\t" \
".end\t__" #symbol "\n\t" \
".size\t__" #symbol",. - __" #symbol)
#define nabi_no_regargs \
unsigned long __dummy0, \

3
arch/mips/include/asm/unistd.h
Visa fil

@@ -35,7 +35,6 @@
#define __ARCH_WANT_SYS_OLDUMOUNT
#define __ARCH_WANT_SYS_SIGPENDING
#define __ARCH_WANT_SYS_SIGPROCMASK
#define __ARCH_WANT_SYS_RT_SIGACTION
# ifdef CONFIG_32BIT
# define __ARCH_WANT_STAT64
# define __ARCH_WANT_SYS_TIME
@@ -43,6 +42,8 @@
# ifdef CONFIG_MIPS32_O32
# define __ARCH_WANT_COMPAT_SYS_TIME
# endif
#define __ARCH_WANT_SYS_FORK
#define __ARCH_WANT_SYS_CLONE
/* whitelists for checksyscalls */
#define __IGNORE_select

6
arch/mips/include/uapi/asm/signal.h
Visa fil

@@ -96,15 +96,13 @@ typedef unsigned long old_sigset_t; /* at least 32 bits */
#include <asm-generic/signal-defs.h>
#ifndef __KERNEL__
struct sigaction {
unsigned int sa_flags;
__sighandler_t sa_handler;
sigset_t sa_mask;
};
struct k_sigaction {
struct sigaction sa;
};
#endif
/* IRIX compatible stack_t */
typedef struct sigaltstack {

44
arch/mips/kernel/linux32.c
Visa fil

@@ -119,22 +119,6 @@ SYSCALL_DEFINE6(32_pwrite, unsigned int, fd, const char __user *, buf,
return sys_pwrite64(fd, buf, count, merge_64(a4, a5));
}
SYSCALL_DEFINE2(32_sched_rr_get_interval, compat_pid_t, pid,
struct compat_timespec __user *, interval)
{
struct timespec t;
int ret;
mm_segment_t old_fs = get_fs();
set_fs(KERNEL_DS);
ret = sys_sched_rr_get_interval(pid, (struct timespec __user *)&t);
set_fs(old_fs);
if (put_user (t.tv_sec, &interval->tv_sec) ||
__put_user(t.tv_nsec, &interval->tv_nsec))
return -EFAULT;
return ret;
}
#ifdef CONFIG_SYSVIPC
SYSCALL_DEFINE6(32_ipc, u32, call, long, first, long, second, long, third,
@@ -295,27 +279,6 @@ asmlinkage long sys32_fallocate(int fd, int mode, unsigned offset_a2,
merge_64(len_a4, len_a5));
}
save_static_function(sys32_clone);
static int noinline __used
_sys32_clone(nabi_no_regargs struct pt_regs regs)
{
unsigned long clone_flags;
unsigned long newsp;
int __user *parent_tidptr, *child_tidptr;
clone_flags = regs.regs[4];
newsp = regs.regs[5];
if (!newsp)
newsp = regs.regs[29];
parent_tidptr = (int __user *) regs.regs[6];
/* Use __dummy4 instead of getting it off the stack, so that
syscall() works. */
child_tidptr = (int __user *) __dummy4;
return do_fork(clone_flags, newsp, 0,
parent_tidptr, child_tidptr);
}
asmlinkage long sys32_lookup_dcookie(u32 a0, u32 a1, char __user *buf,
size_t len)
{
@@ -328,10 +291,3 @@ SYSCALL_DEFINE6(32_fanotify_mark, int, fanotify_fd, unsigned int, flags,
return sys_fanotify_mark(fanotify_fd, flags, merge_64(a3, a4),
dfd, pathname);
}
SYSCALL_DEFINE6(32_futex, u32 __user *, uaddr, int, op, u32, val,
struct compat_timespec __user *, utime, u32 __user *, uaddr2,
u32, val3)
{
return compat_sys_futex(uaddr, op, val, utime, uaddr2, val3);
}

3
arch/mips/kernel/process.c
Visa fil

@@ -156,7 +156,8 @@ int copy_thread(unsigned long clone_flags, unsigned long usp,
*childregs = *regs;
childregs->regs[7] = 0; /* Clear error flag */
childregs->regs[2] = 0; /* Child gets zero as return value */
childregs->regs[29] = usp;
if (usp)
childregs->regs[29] = usp;
ti->addr_limit = USER_DS;
p->thread.reg29 = (unsigned long) childregs;

4
arch/mips/kernel/scall32-o32.S
Visa fil

@@ -226,7 +226,7 @@ einval: li v0, -ENOSYS
.macro syscalltable
sys sys_syscall 8 /* 4000 */
sys sys_exit 1
sys sys_fork 0
sys __sys_fork 0
sys sys_read 3
sys sys_write 3
sys sys_open 3 /* 4005 */
@@ -344,7 +344,7 @@ einval: li v0, -ENOSYS
sys sys_ipc 6
sys sys_fsync 1
sys sys_sigreturn 0
sys sys_clone 0 /* 4120 */
sys __sys_clone 6 /* 4120 */
sys sys_setdomainname 2
sys sys_newuname 1
sys sys_ni_syscall 0 /* sys_modify_ldt */

4
arch/mips/kernel/scall64-64.S
Visa fil

@@ -170,8 +170,8 @@ sys_call_table:
PTR sys_socketpair
PTR sys_setsockopt
PTR sys_getsockopt
PTR sys_clone /* 5055 */
PTR sys_fork
PTR __sys_clone /* 5055 */
PTR __sys_fork
PTR sys_execve
PTR sys_exit
PTR sys_wait4

20
arch/mips/kernel/scall64-n32.S
Visa fil

@@ -117,8 +117,8 @@ EXPORT(sysn32_call_table)
PTR sys_mprotect /* 6010 */
PTR sys_munmap
PTR sys_brk
PTR sys_32_rt_sigaction
PTR sys_32_rt_sigprocmask
PTR compat_sys_rt_sigaction
PTR compat_sys_rt_sigprocmask
PTR compat_sys_ioctl /* 6015 */
PTR sys_pread64
PTR sys_pwrite64
@@ -159,8 +159,8 @@ EXPORT(sysn32_call_table)
PTR sys_socketpair
PTR compat_sys_setsockopt
PTR sys_getsockopt
PTR sys_clone /* 6055 */
PTR sys_fork
PTR __sys_clone /* 6055 */
PTR __sys_fork
PTR compat_sys_execve
PTR sys_exit
PTR compat_sys_wait4
@@ -229,11 +229,11 @@ EXPORT(sysn32_call_table)
PTR sys_getsid
PTR sys_capget
PTR sys_capset
PTR sys_32_rt_sigpending /* 6125 */
PTR compat_sys_rt_sigpending /* 6125 */
PTR compat_sys_rt_sigtimedwait
PTR sys_32_rt_sigqueueinfo
PTR sysn32_rt_sigsuspend
PTR sys32_sigaltstack
PTR compat_sys_rt_sigqueueinfo
PTR compat_sys_rt_sigsuspend
PTR compat_sys_sigaltstack
PTR compat_sys_utime /* 6130 */
PTR sys_mknod
PTR sys_32_personality
@@ -249,7 +249,7 @@ EXPORT(sysn32_call_table)
PTR sys_sched_getscheduler
PTR sys_sched_get_priority_max
PTR sys_sched_get_priority_min
PTR sys_32_sched_rr_get_interval /* 6145 */
PTR compat_sys_sched_rr_get_interval /* 6145 */
PTR sys_mlock
PTR sys_munlock
PTR sys_mlockall
@@ -298,7 +298,7 @@ EXPORT(sysn32_call_table)
PTR sys_fremovexattr
PTR sys_tkill
PTR sys_ni_syscall
PTR sys_32_futex
PTR compat_sys_futex
PTR compat_sys_sched_setaffinity /* 6195 */
PTR compat_sys_sched_getaffinity
PTR sys_cacheflush

22
arch/mips/kernel/scall64-o32.S
Visa fil

@@ -194,7 +194,7 @@ einval: li v0, -ENOSYS
sys_call_table:
PTR sys32_syscall /* 4000 */
PTR sys_exit
PTR sys_fork
PTR __sys_fork
PTR sys_read
PTR sys_write
PTR compat_sys_open /* 4005 */
@@ -312,7 +312,7 @@ sys_call_table:
PTR sys_32_ipc
PTR sys_fsync
PTR sys32_sigreturn
PTR sys32_clone /* 4120 */
PTR __sys_clone /* 4120 */
PTR sys_setdomainname
PTR sys_newuname
PTR sys_ni_syscall /* sys_modify_ldt */
@@ -357,7 +357,7 @@ sys_call_table:
PTR sys_sched_yield
PTR sys_sched_get_priority_max
PTR sys_sched_get_priority_min
PTR sys_32_sched_rr_get_interval /* 4165 */
PTR compat_sys_sched_rr_get_interval /* 4165 */
PTR compat_sys_nanosleep
PTR sys_mremap
PTR sys_accept
@@ -386,19 +386,19 @@ sys_call_table:
PTR sys_getresgid
PTR sys_prctl
PTR sys32_rt_sigreturn
PTR sys_32_rt_sigaction
PTR sys_32_rt_sigprocmask /* 4195 */
PTR sys_32_rt_sigpending
PTR compat_sys_rt_sigaction
PTR compat_sys_rt_sigprocmask /* 4195 */
PTR compat_sys_rt_sigpending
PTR compat_sys_rt_sigtimedwait
PTR sys_32_rt_sigqueueinfo
PTR sys32_rt_sigsuspend
PTR compat_sys_rt_sigqueueinfo
PTR compat_sys_rt_sigsuspend
PTR sys_32_pread /* 4200 */
PTR sys_32_pwrite
PTR sys_chown
PTR sys_getcwd
PTR sys_capget
PTR sys_capset /* 4205 */
PTR sys32_sigaltstack
PTR compat_sys_sigaltstack
PTR sys_32_sendfile
PTR sys_ni_syscall
PTR sys_ni_syscall
@@ -430,7 +430,7 @@ sys_call_table:
PTR sys_fremovexattr /* 4235 */
PTR sys_tkill
PTR sys_sendfile64
PTR sys_32_futex
PTR compat_sys_futex
PTR compat_sys_sched_setaffinity
PTR compat_sys_sched_getaffinity /* 4240 */
PTR compat_sys_io_setup
@@ -470,7 +470,7 @@ sys_call_table:
PTR compat_sys_mq_notify /* 4275 */
PTR compat_sys_mq_getsetattr
PTR sys_ni_syscall /* sys_vserver */
PTR sys_32_waitid
PTR compat_sys_waitid
PTR sys_ni_syscall /* available, was setaltroot */
PTR sys_add_key /* 4280 */
PTR sys_request_key

48
arch/mips/kernel/signal.c
Visa fil

@@ -247,35 +247,12 @@ void __user *get_sigframe(struct k_sigaction *ka, struct pt_regs *regs,
*/
#ifdef CONFIG_TRAD_SIGNALS
asmlinkage int sys_sigsuspend(nabi_no_regargs struct pt_regs regs)
SYSCALL_DEFINE1(sigsuspend, sigset_t __user *, uset)
{
sigset_t newset;
sigset_t __user *uset;
uset = (sigset_t __user *) regs.regs[4];
if (copy_from_user(&newset, uset, sizeof(sigset_t)))
return -EFAULT;
return sigsuspend(&newset);
return sys_rt_sigsuspend(uset, sizeof(sigset_t));
}
#endif
asmlinkage int sys_rt_sigsuspend(nabi_no_regargs struct pt_regs regs)
{
sigset_t newset;
sigset_t __user *unewset;
size_t sigsetsize;
/* XXX Don't preclude handling different sized sigset_t's. */
sigsetsize = regs.regs[5];
if (sigsetsize != sizeof(sigset_t))
return -EINVAL;
unewset = (sigset_t __user *) regs.regs[4];
if (copy_from_user(&newset, unewset, sizeof(newset)))
return -EFAULT;
return sigsuspend(&newset);
}
#ifdef CONFIG_TRAD_SIGNALS
SYSCALL_DEFINE3(sigaction, int, sig, const struct sigaction __user *, act,
struct sigaction __user *, oact)
@@ -317,15 +294,6 @@ SYSCALL_DEFINE3(sigaction, int, sig, const struct sigaction __user *, act,
}
#endif
asmlinkage int sys_sigaltstack(nabi_no_regargs struct pt_regs regs)
{
const stack_t __user *uss = (const stack_t __user *) regs.regs[4];
stack_t __user *uoss = (stack_t __user *) regs.regs[5];
unsigned long usp = regs.regs[29];
return do_sigaltstack(uss, uoss, usp);
}
#ifdef CONFIG_TRAD_SIGNALS
asmlinkage void sys_sigreturn(nabi_no_regargs struct pt_regs regs)
{
@@ -382,9 +350,8 @@ asmlinkage void sys_rt_sigreturn(nabi_no_regargs struct pt_regs regs)
else if (sig)
force_sig(sig, current);
/* It is more difficult to avoid calling this function than to
call it and ignore errors. */
do_sigaltstack(&frame->rs_uc.uc_stack, NULL, regs.regs[29]);
if (restore_altstack(&frame->rs_uc.uc_stack))
goto badframe;
/*
* Don't let your children do this ...
@@ -461,12 +428,7 @@ static int setup_rt_frame(void *sig_return, struct k_sigaction *ka,
/* Create the ucontext. */
err |= __put_user(0, &frame->rs_uc.uc_flags);
err |= __put_user(NULL, &frame->rs_uc.uc_link);
err |= __put_user((void __user *)current->sas_ss_sp,
&frame->rs_uc.uc_stack.ss_sp);
err |= __put_user(sas_ss_flags(regs->regs[29]),
&frame->rs_uc.uc_stack.ss_flags);
err |= __put_user(current->sas_ss_size,
&frame->rs_uc.uc_stack.ss_size);
err |= __save_altstack(&frame->rs_uc.uc_stack, regs->regs[29]);
err |= setup_sigcontext(regs, &frame->rs_uc.uc_mcontext);
err |= __copy_to_user(&frame->rs_uc.uc_sigmask, set, sizeof(*set));

237
arch/mips/kernel/signal32.c
Visa fil

@@ -55,23 +55,10 @@ extern asmlinkage int fpu_emulator_restore_context32(struct sigcontext32 __user
typedef unsigned int __sighandler32_t;
typedef void (*vfptr_t)(void);
struct sigaction32 {
unsigned int sa_flags;
__sighandler32_t sa_handler;
compat_sigset_t sa_mask;
};
/* IRIX compatible stack_t */
typedef struct sigaltstack32 {
s32 ss_sp;
compat_size_t ss_size;
int ss_flags;
} stack32_t;
struct ucontext32 {
u32 uc_flags;
s32 uc_link;
stack32_t uc_stack;
compat_stack_t uc_stack;
struct sigcontext32 uc_mcontext;
compat_sigset_t uc_sigmask; /* mask last for extensibility */
};
@@ -280,36 +267,13 @@ static inline int get_sigset(sigset_t *kbuf, const compat_sigset_t __user *ubuf)
* Atomically swap in the new signal mask, and wait for a signal.
*/
asmlinkage int sys32_sigsuspend(nabi_no_regargs struct pt_regs regs)
asmlinkage int sys32_sigsuspend(compat_sigset_t __user *uset)
{
compat_sigset_t __user *uset;
sigset_t newset;
uset = (compat_sigset_t __user *) regs.regs[4];
if (get_sigset(&newset, uset))
return -EFAULT;
return sigsuspend(&newset);
return compat_sys_rt_sigsuspend(uset, sizeof(compat_sigset_t));
}
asmlinkage int sys32_rt_sigsuspend(nabi_no_regargs struct pt_regs regs)
{
compat_sigset_t __user *uset;
sigset_t newset;
size_t sigsetsize;
/* XXX Don't preclude handling different sized sigset_t's. */
sigsetsize = regs.regs[5];
if (sigsetsize != sizeof(compat_sigset_t))
return -EINVAL;
uset = (compat_sigset_t __user *) regs.regs[4];
if (get_sigset(&newset, uset))
return -EFAULT;
return sigsuspend(&newset);
}
SYSCALL_DEFINE3(32_sigaction, long, sig, const struct sigaction32 __user *, act,
struct sigaction32 __user *, oact)
SYSCALL_DEFINE3(32_sigaction, long, sig, const struct compat_sigaction __user *, act,
struct compat_sigaction __user *, oact)
{
struct k_sigaction new_ka, old_ka;
int ret;
@@ -350,45 +314,6 @@ SYSCALL_DEFINE3(32_sigaction, long, sig, const struct sigaction32 __user *, act,
return ret;
}
asmlinkage int sys32_sigaltstack(nabi_no_regargs struct pt_regs regs)
{
const stack32_t __user *uss = (const stack32_t __user *) regs.regs[4];
stack32_t __user *uoss = (stack32_t __user *) regs.regs[5];
unsigned long usp = regs.regs[29];
stack_t kss, koss;
int ret, err = 0;
mm_segment_t old_fs = get_fs();
s32 sp;
if (uss) {
if (!access_ok(VERIFY_READ, uss, sizeof(*uss)))
return -EFAULT;
err |= __get_user(sp, &uss->ss_sp);
kss.ss_sp = (void __user *) (long) sp;
err |= __get_user(kss.ss_size, &uss->ss_size);
err |= __get_user(kss.ss_flags, &uss->ss_flags);
if (err)
return -EFAULT;
}
set_fs(KERNEL_DS);
ret = do_sigaltstack(uss ? (stack_t __user *)&kss : NULL,
uoss ? (stack_t __user *)&koss : NULL, usp);
set_fs(old_fs);
if (!ret && uoss) {
if (!access_ok(VERIFY_WRITE, uoss, sizeof(*uoss)))
return -EFAULT;
sp = (int) (unsigned long) koss.ss_sp;
err |= __put_user(sp, &uoss->ss_sp);
err |= __put_user(koss.ss_size, &uoss->ss_size);
err |= __put_user(koss.ss_flags, &uoss->ss_flags);
if (err)
return -EFAULT;
}
return ret;
}
int copy_siginfo_to_user32(compat_siginfo_t __user *to, siginfo_t *from)
{
int err;
@@ -490,10 +415,7 @@ badframe:
asmlinkage void sys32_rt_sigreturn(nabi_no_regargs struct pt_regs regs)
{
struct rt_sigframe32 __user *frame;
mm_segment_t old_fs;
sigset_t set;
stack_t st;
s32 sp;
int sig;
frame = (struct rt_sigframe32 __user *) regs.regs[29];
@@ -510,21 +432,8 @@ asmlinkage void sys32_rt_sigreturn(nabi_no_regargs struct pt_regs regs)
else if (sig)
force_sig(sig, current);
/* The ucontext contains a stack32_t, so we must convert! */
if (__get_user(sp, &frame->rs_uc.uc_stack.ss_sp))
if (compat_restore_altstack(&frame->rs_uc.uc_stack))
goto badframe;
st.ss_sp = (void __user *)(long) sp;
if (__get_user(st.ss_size, &frame->rs_uc.uc_stack.ss_size))
goto badframe;
if (__get_user(st.ss_flags, &frame->rs_uc.uc_stack.ss_flags))
goto badframe;
/* It is more difficult to avoid calling this function than to
call it and ignore errors. */
old_fs = get_fs();
set_fs(KERNEL_DS);
do_sigaltstack((stack_t __user *)&st, NULL, regs.regs[29]);
set_fs(old_fs);
/*
* Don't let your children do this ...
@@ -590,7 +499,6 @@ static int setup_rt_frame_32(void *sig_return, struct k_sigaction *ka,
{
struct rt_sigframe32 __user *frame;
int err = 0;
s32 sp;
frame = get_sigframe(ka, regs, sizeof(*frame));
if (!access_ok(VERIFY_WRITE, frame, sizeof (*frame)))
@@ -602,13 +510,7 @@ static int setup_rt_frame_32(void *sig_return, struct k_sigaction *ka,
/* Create the ucontext. */
err |= __put_user(0, &frame->rs_uc.uc_flags);
err |= __put_user(0, &frame->rs_uc.uc_link);
sp = (int) (long) current->sas_ss_sp;
err |= __put_user(sp,
&frame->rs_uc.uc_stack.ss_sp);
err |= __put_user(sas_ss_flags(regs->regs[29]),
&frame->rs_uc.uc_stack.ss_flags);
err |= __put_user(current->sas_ss_size,
&frame->rs_uc.uc_stack.ss_size);
err |= __compat_save_altstack(&frame->rs_uc.uc_stack, regs->regs[29]);
err |= setup_sigcontext32(regs, &frame->rs_uc.uc_mcontext);
err |= __copy_conv_sigset_to_user(&frame->rs_uc.uc_sigmask, set);
@@ -656,131 +558,6 @@ struct mips_abi mips_abi_32 = {
.restart = __NR_O32_restart_syscall
};
SYSCALL_DEFINE4(32_rt_sigaction, int, sig,
const struct sigaction32 __user *, act,
struct sigaction32 __user *, oact, unsigned int, sigsetsize)
{
struct k_sigaction new_sa, old_sa;
int ret = -EINVAL;
/* XXX: Don't preclude handling different sized sigset_t's. */
if (sigsetsize != sizeof(sigset_t))
goto out;
if (act) {
s32 handler;
int err = 0;
if (!access_ok(VERIFY_READ, act, sizeof(*act)))
return -EFAULT;
err |= __get_user(handler, &act->sa_handler);
new_sa.sa.sa_handler = (void __user *)(s64)handler;
err |= __get_user(new_sa.sa.sa_flags, &act->sa_flags);
err |= get_sigset(&new_sa.sa.sa_mask, &act->sa_mask);
if (err)
return -EFAULT;
}
ret = do_sigaction(sig, act ? &new_sa : NULL, oact ? &old_sa : NULL);
if (!ret && oact) {
int err = 0;
if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)))
return -EFAULT;
err |= __put_user((u32)(u64)old_sa.sa.sa_handler,
&oact->sa_handler);
err |= __put_user(old_sa.sa.sa_flags, &oact->sa_flags);
err |= put_sigset(&old_sa.sa.sa_mask, &oact->sa_mask);
if (err)
return -EFAULT;
}
out:
return ret;
}
SYSCALL_DEFINE4(32_rt_sigprocmask, int, how, compat_sigset_t __user *, set,
compat_sigset_t __user *, oset, unsigned int, sigsetsize)
{
sigset_t old_set, new_set;
int ret;
mm_segment_t old_fs = get_fs();
if (set && get_sigset(&new_set, set))
return -EFAULT;
set_fs(KERNEL_DS);
ret = sys_rt_sigprocmask(how, set ? (sigset_t __user *)&new_set : NULL,
oset ? (sigset_t __user *)&old_set : NULL,
sigsetsize);
set_fs(old_fs);
if (!ret && oset && put_sigset(&old_set, oset))
return -EFAULT;
return ret;
}
SYSCALL_DEFINE2(32_rt_sigpending, compat_sigset_t __user *, uset,
unsigned int, sigsetsize)
{
int ret;
sigset_t set;
mm_segment_t old_fs = get_fs();
set_fs(KERNEL_DS);
ret = sys_rt_sigpending((sigset_t __user *)&set, sigsetsize);
set_fs(old_fs);
if (!ret && put_sigset(&set, uset))
return -EFAULT;
return ret;
}
SYSCALL_DEFINE3(32_rt_sigqueueinfo, int, pid, int, sig,
compat_siginfo_t __user *, uinfo)
{
siginfo_t info;
int ret;
mm_segment_t old_fs = get_fs();
if (copy_from_user(&info, uinfo, 3*sizeof(int)) ||
copy_from_user(info._sifields._pad, uinfo->_sifields._pad, SI_PAD_SIZE))
return -EFAULT;
set_fs(KERNEL_DS);
ret = sys_rt_sigqueueinfo(pid, sig, (siginfo_t __user *)&info);
set_fs(old_fs);
return ret;
}
SYSCALL_DEFINE5(32_waitid, int, which, compat_pid_t, pid,
compat_siginfo_t __user *, uinfo, int, options,
struct compat_rusage __user *, uru)
{
siginfo_t info;
struct rusage ru;
long ret;
mm_segment_t old_fs = get_fs();
info.si_signo = 0;
set_fs(KERNEL_DS);
ret = sys_waitid(which, pid, (siginfo_t __user *) &info, options,
uru ? (struct rusage __user *) &ru : NULL);
set_fs(old_fs);
if (ret < 0 || info.si_signo == 0)
return ret;
if (uru && (ret = put_compat_rusage(&ru, uru)))
return ret;
BUG_ON(info.si_code & __SI_MASK);
info.si_code |= __SI_CHLD;
return copy_siginfo_to_user32(uinfo, &info);
}
static int signal32_init(void)
{
if (cpu_has_fpu) {

59
arch/mips/kernel/signal_n32.c
Visa fil

@@ -50,18 +50,10 @@
extern int setup_sigcontext(struct pt_regs *, struct sigcontext __user *);
extern int restore_sigcontext(struct pt_regs *, struct sigcontext __user *);
/* IRIX compatible stack_t */
typedef struct sigaltstack32 {
s32 ss_sp;
compat_size_t ss_size;
int ss_flags;
} stack32_t;
struct ucontextn32 {
u32 uc_flags;
s32 uc_link;
stack32_t uc_stack;
compat_stack_t uc_stack;
struct sigcontext uc_mcontext;
compat_sigset_t uc_sigmask; /* mask last for extensibility */
};
@@ -73,34 +65,10 @@ struct rt_sigframe_n32 {
struct ucontextn32 rs_uc;
};
extern void sigset_from_compat(sigset_t *set, compat_sigset_t *compat);
asmlinkage int sysn32_rt_sigsuspend(nabi_no_regargs struct pt_regs regs)
{
compat_sigset_t __user *unewset;
compat_sigset_t uset;
size_t sigsetsize;
sigset_t newset;
/* XXX Don't preclude handling different sized sigset_t's. */
sigsetsize = regs.regs[5];
if (sigsetsize != sizeof(sigset_t))
return -EINVAL;
unewset = (compat_sigset_t __user *) regs.regs[4];
if (copy_from_user(&uset, unewset, sizeof(uset)))
return -EFAULT;
sigset_from_compat(&newset, &uset);
return sigsuspend(&newset);
}
asmlinkage void sysn32_rt_sigreturn(nabi_no_regargs struct pt_regs regs)
{
struct rt_sigframe_n32 __user *frame;
mm_segment_t old_fs;
sigset_t set;
stack_t st;
s32 sp;
int sig;
frame = (struct rt_sigframe_n32 __user *) regs.regs[29];
@@ -117,22 +85,8 @@ asmlinkage void sysn32_rt_sigreturn(nabi_no_regargs struct pt_regs regs)
else if (sig)
force_sig(sig, current);
/* The ucontext contains a stack32_t, so we must convert! */
if (__get_user(sp, &frame->rs_uc.uc_stack.ss_sp))
if (compat_restore_altstack(&frame->rs_uc.uc_stack))
goto badframe;
st.ss_sp = (void __user *)(long) sp;
if (__get_user(st.ss_size, &frame->rs_uc.uc_stack.ss_size))
goto badframe;
if (__get_user(st.ss_flags, &frame->rs_uc.uc_stack.ss_flags))
goto badframe;
/* It is more difficult to avoid calling this function than to
call it and ignore errors. */
old_fs = get_fs();
set_fs(KERNEL_DS);
do_sigaltstack((stack_t __user *)&st, NULL, regs.regs[29]);
set_fs(old_fs);
/*
* Don't let your children do this ...
@@ -153,7 +107,6 @@ static int setup_rt_frame_n32(void *sig_return, struct k_sigaction *ka,
{
struct rt_sigframe_n32 __user *frame;
int err = 0;
s32 sp;
frame = get_sigframe(ka, regs, sizeof(*frame));
if (!access_ok(VERIFY_WRITE, frame, sizeof (*frame)))
@@ -165,13 +118,7 @@ static int setup_rt_frame_n32(void *sig_return, struct k_sigaction *ka,
/* Create the ucontext. */
err |= __put_user(0, &frame->rs_uc.uc_flags);
err |= __put_user(0, &frame->rs_uc.uc_link);
sp = (int) (long) current->sas_ss_sp;
err |= __put_user(sp,
&frame->rs_uc.uc_stack.ss_sp);
err |= __put_user(sas_ss_flags(regs->regs[29]),
&frame->rs_uc.uc_stack.ss_flags);
err |= __put_user(current->sas_ss_size,
&frame->rs_uc.uc_stack.ss_size);
err |= __compat_save_altstack(&frame->rs_uc.uc_stack, regs->regs[29]);
err |= setup_sigcontext(regs, &frame->rs_uc.uc_mcontext);
err |= __copy_conv_sigset_to_user(&frame->rs_uc.uc_sigmask, set);

73
arch/mips/kernel/syscall.c
Visa fil

@@ -46,20 +46,14 @@
* argument. Historically that used to be expensive in Linux. These days
* the performance advantage is negligible.
*/
asmlinkage int sysm_pipe(nabi_no_regargs volatile struct pt_regs regs)
asmlinkage int sysm_pipe(void)
{
int fd[2];
int error, res;
error = do_pipe_flags(fd, 0);
if (error) {
res = error;
goto out;
}
regs.regs[3] = fd[1];
res = fd[0];
out:
return res;
int error = do_pipe_flags(fd, 0);
if (error)
return error;
current_pt_regs()->regs[3] = fd[1];
return fd[0];
}
SYSCALL_DEFINE6(mips_mmap, unsigned long, addr, unsigned long, len,
@@ -89,43 +83,7 @@ SYSCALL_DEFINE6(mips_mmap2, unsigned long, addr, unsigned long, len,
}
save_static_function(sys_fork);
static int __used noinline
_sys_fork(nabi_no_regargs struct pt_regs regs)
{
return do_fork(SIGCHLD, regs.regs[29], 0, NULL, NULL);
}
save_static_function(sys_clone);
static int __used noinline
_sys_clone(nabi_no_regargs struct pt_regs regs)
{
unsigned long clone_flags;
unsigned long newsp;
int __user *parent_tidptr, *child_tidptr;
clone_flags = regs.regs[4];
newsp = regs.regs[5];
if (!newsp)
newsp = regs.regs[29];
parent_tidptr = (int __user *) regs.regs[6];
#ifdef CONFIG_32BIT
/* We need to fetch the fifth argument off the stack. */
child_tidptr = NULL;
if (clone_flags & (CLONE_CHILD_SETTID | CLONE_CHILD_CLEARTID)) {
int __user *__user *usp = (int __user *__user *) regs.regs[29];
if (regs.regs[2] == __NR_syscall) {
if (get_user (child_tidptr, &usp[5]))
return -EFAULT;
}
else if (get_user (child_tidptr, &usp[4]))
return -EFAULT;
}
#else
child_tidptr = (int __user *) regs.regs[8];
#endif
return do_fork(clone_flags, newsp, 0,
parent_tidptr, child_tidptr);
}
SYSCALL_DEFINE1(set_thread_area, unsigned long, addr)
{
@@ -138,10 +96,10 @@ SYSCALL_DEFINE1(set_thread_area, unsigned long, addr)
return 0;
}
static inline int mips_atomic_set(struct pt_regs *regs,
unsigned long addr, unsigned long new)
static inline int mips_atomic_set(unsigned long addr, unsigned long new)
{
unsigned long old, tmp;
struct pt_regs *regs;
unsigned int err;
if (unlikely(addr & 3))
@@ -222,6 +180,7 @@ static inline int mips_atomic_set(struct pt_regs *regs,
if (unlikely(err))
return err;
regs = current_pt_regs();
regs->regs[2] = old;
regs->regs[7] = 0; /* No error */
@@ -235,22 +194,14 @@ static inline int mips_atomic_set(struct pt_regs *regs,
: "r" (regs));
/* unreached. Honestly. */
while (1);
unreachable();
}
save_static_function(sys_sysmips);
static int __used noinline
_sys_sysmips(nabi_no_regargs struct pt_regs regs)
SYSCALL_DEFINE3(sysmips, long, cmd, long, arg1, long, arg2)
{
long cmd, arg1, arg2;
cmd = regs.regs[4];
arg1 = regs.regs[5];
arg2 = regs.regs[6];
switch (cmd) {
case MIPS_ATOMIC_SET:
return mips_atomic_set(&regs, arg1, arg2);
return mips_atomic_set(arg1, arg2);
case MIPS_FIXADE:
if (arg1 & ~3)