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linux/arch/sh/kernel/signal_32.c

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Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
/*
* linux/arch/sh/kernel/signal.c
*
* Copyright (C) 1991, 1992 Linus Torvalds
*
* 1997-11-28 Modified for POSIX.1b signals by Richard Henderson
*
* SuperH version: Copyright (C) 1999, 2000 Niibe Yutaka & Kaz Kojima
*
*/
#include <linux/sched.h>
#include <linux/mm.h>
#include <linux/smp.h>
#include <linux/kernel.h>
#include <linux/signal.h>
#include <linux/errno.h>
#include <linux/wait.h>
#include <linux/ptrace.h>
#include <linux/unistd.h>
#include <linux/stddef.h>
#include <linux/tty.h>
sh: Initial vsyscall page support. This implements initial support for the vsyscall page on SH. At the moment we leave it configurable due to having nommu to support from the same code base. We hook it up for the signal trampoline return at present, with more to be added later, once uClibc catches up. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-09-27 17:33:49 +08:00
#include <linux/elf.h>
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
#include <linux/personality.h>
#include <linux/binfmts.h>
sh: Tidy compiler warnings for SH-2A build. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-06-01 16:26:13 +08:00
#include <linux/io.h>
sh: Make syscall tracer use tracehook notifiers, add TIF_NOTIFY_RESUME. This follows the changes in commits: 7d6d637dac2050f30a1b57b0a3dc5de4a10616ba 4f72c4279eab1e5f3ed1ac4e55d4527617582392 on powerpc. Adding in TIF_NOTIFY_RESUME, and cleaning up the syscall tracing to be more generic. This is an incremental step to turning on tracehook, as well as unifying more of the ptrace and signal code across the 32/64 split. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2008-07-30 18:55:30 +08:00
#include <linux/tracehook.h>
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
#include <asm/ucontext.h>
#include <asm/uaccess.h>
#include <asm/pgtable.h>
#include <asm/cacheflush.h>
sh: fixup many sparse errors. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2008-09-04 17:53:58 +08:00
#include <asm/syscalls.h>
sh: Fix occasional FPU register corruption under preempt. Presently with preempt enabled there's the possibility to be preempted after the TIF_USEDFPU test and the register save, leading to bogus state post-__switch_to(). Use an explicit preempt_disable()/enable() pair around unlazy_fpu()/clear_fpu() to avoid this. Follows the x86 change. Reported-by: Takuo Koguchi <takuo.koguchi.sw@hitachi.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2008-03-26 18:02:47 +08:00
#include <asm/fpu.h>
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
sh: Initial ELF FDPIC support. This adds initial support for ELF FDPIC on MMU-less SH, as per version 0.2 of the ABI definition at: http://www.codesourcery.com/public/docs/sh-fdpic/sh-fdpic-abi.txt Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2008-05-19 12:40:12 +08:00
struct fdpic_func_descriptor {
unsigned long text;
unsigned long GOT;
};
sh: Improve unwind info for signals GCC does not issue unwind information for function epilogues. Unfortunately we can catch a signal during an epilogue. The signal handler writes the current context and signal return code onto the stack overwriting previous contents. During unwinding, libgcc can try to restore registers from the stack and restores corrupted ones. This can lead to segmentation, misaligned access and sigbus faults. For example, consider the following code: mov.l r12,@-r15 mov.l r14,@-r15 sts.l pr,@-r15 mov r15,r14 <do stuff> mov r14, r15 lds.l @r15+, pr <<< SIGNAL HERE mov.l @r15+, r14 mov.l @r15+, r12 rts Unwind is aware that pr was pushed to stack in prolog, so tries to restore it. Unfortunately it restores the last word of the signal handler code placed on the stack by the kernel. This patch tries to avoid the problem by adding a guard region on the stack between where the function pushes data and where the signal handler pushes its return code. We probably don't see this problem often because exception handling unwinding in an epilogue only occurs due to a pthread cancel signal. Also the kernel signal stack handler alignment of 8 bytes could hide the occurance of this problem sometimes as the stack may not be trampled at a particular required word. This is not guaranteed to always work. It relies on a frame pointer existing for the function (so it can get the correct sp value) which is not always the case for the SH4. Modifications will also be made to libgcc for the case where there is no fp. Signed-off-by: Carl Shaw <carl.shaw@st.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-08-24 14:07:08 +08:00
/*
* The following define adds a 64 byte gap between the signal
* stack frame and previous contents of the stack. This allows
* frame unwinding in a function epilogue but only if a frame
* pointer is used in the function. This is necessary because
* current gcc compilers (<4.3) do not generate unwind info on
* SH for function epilogues.
*/
#define UNWINDGUARD 64
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
/*
* Do a signal return; undo the signal stack.
*/
#define MOVW(n) (0x9300|((n)-2)) /* Move mem word at PC+n to R3 */
sh: Trivial build fixes for SH-2 support. Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-12-07 17:07:27 +08:00
#if defined(CONFIG_CPU_SH2)
sh: Add support for SH7206 and SH7619 CPU subtypes. This implements initial support for the SH7206 (SH-2A) and SH7619 (SH-2) MMU-less CPUs. Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-11-05 14:40:13 +08:00
#define TRAP_NOARG 0xc320 /* Syscall w/no args (NR in R3) */
#else
#define TRAP_NOARG 0xc310 /* Syscall w/no args (NR in R3) */
#endif
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
#define OR_R0_R0 0x200b /* or r0,r0 (insert to avoid hardware bug) */
struct sigframe
{
struct sigcontext sc;
unsigned long extramask[_NSIG_WORDS-1];
u16 retcode[8];
};
struct rt_sigframe
{
struct siginfo info;
struct ucontext uc;
u16 retcode[8];
};
#ifdef CONFIG_SH_FPU
static inline int restore_sigcontext_fpu(struct sigcontext __user *sc)
{
struct task_struct *tsk = current;
sh: Use boot_cpu_data for FPU tests in sigcontext paths. We do not want to use smp_processor_id() from these paths, as they trip preempt BUGs. Switch the test over to the boot cpu directly. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-10-14 13:12:41 +08:00
if (!(boot_cpu_data.flags & CPU_HAS_FPU))
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
return 0;
set_used_math();
sh: Move over to dynamically allocated FPU context. This follows the x86 xstate changes and implements a task_xstate slab cache that is dynamically sized to match one of hard FP/soft FP/FPU-less. This also tidies up and consolidates some of the SH-2A/SH-4 FPU fragmentation. Now fpu state restorers are commonly defined, with the init_fpu()/fpu_init() mess reworked to follow the x86 convention. The fpu_init() register initialization has been replaced by xstate setup followed by writing out to hardware via the standard restore path. As init_fpu() now performs a slab allocation a secondary lighterweight restorer is also introduced for the context switch. In the future the DSP state will be rolled in here, too. More work remains for math emulation and the SH-5 FPU, which presently uses its own special (UP-only) interfaces. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-01-13 11:51:40 +08:00
return __copy_from_user(&tsk->thread.xstate->hardfpu, &sc->sc_fpregs[0],
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
sizeof(long)*(16*2+2));
}
static inline int save_sigcontext_fpu(struct sigcontext __user *sc,
struct pt_regs *regs)
{
struct task_struct *tsk = current;
sh: Use boot_cpu_data for FPU tests in sigcontext paths. We do not want to use smp_processor_id() from these paths, as they trip preempt BUGs. Switch the test over to the boot cpu directly. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-10-14 13:12:41 +08:00
if (!(boot_cpu_data.flags & CPU_HAS_FPU))
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
return 0;
sh: missing checks of __get_user()/__put_user() return values Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-04-23 04:59:56 +08:00
if (!used_math())
return __put_user(0, &sc->sc_ownedfp);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
sh: missing checks of __get_user()/__put_user() return values Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-04-23 04:59:56 +08:00
if (__put_user(1, &sc->sc_ownedfp))
return -EFAULT;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
/* This will cause a "finit" to be triggered by the next
attempted FPU operation by the 'current' process.
*/
clear_used_math();
unlazy_fpu(tsk, regs);
sh: Move over to dynamically allocated FPU context. This follows the x86 xstate changes and implements a task_xstate slab cache that is dynamically sized to match one of hard FP/soft FP/FPU-less. This also tidies up and consolidates some of the SH-2A/SH-4 FPU fragmentation. Now fpu state restorers are commonly defined, with the init_fpu()/fpu_init() mess reworked to follow the x86 convention. The fpu_init() register initialization has been replaced by xstate setup followed by writing out to hardware via the standard restore path. As init_fpu() now performs a slab allocation a secondary lighterweight restorer is also introduced for the context switch. In the future the DSP state will be rolled in here, too. More work remains for math emulation and the SH-5 FPU, which presently uses its own special (UP-only) interfaces. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-01-13 11:51:40 +08:00
return __copy_to_user(&sc->sc_fpregs[0], &tsk->thread.xstate->hardfpu,
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
sizeof(long)*(16*2+2));
}
#endif /* CONFIG_SH_FPU */
static int
restore_sigcontext(struct pt_regs *regs, struct sigcontext __user *sc, int *r0_p)
{
unsigned int err = 0;
#define COPY(x) err |= __get_user(regs->x, &sc->sc_##x)
COPY(regs[1]);
COPY(regs[2]); COPY(regs[3]);
COPY(regs[4]); COPY(regs[5]);
COPY(regs[6]); COPY(regs[7]);
COPY(regs[8]); COPY(regs[9]);
COPY(regs[10]); COPY(regs[11]);
COPY(regs[12]); COPY(regs[13]);
COPY(regs[14]); COPY(regs[15]);
COPY(gbr); COPY(mach);
COPY(macl); COPY(pr);
COPY(sr); COPY(pc);
#undef COPY
#ifdef CONFIG_SH_FPU
sh: Use boot_cpu_data for FPU tests in sigcontext paths. We do not want to use smp_processor_id() from these paths, as they trip preempt BUGs. Switch the test over to the boot cpu directly. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-10-14 13:12:41 +08:00
if (boot_cpu_data.flags & CPU_HAS_FPU) {
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
int owned_fp;
struct task_struct *tsk = current;
regs->sr |= SR_FD; /* Release FPU */
clear_fpu(tsk, regs);
clear_used_math();
sh: missing checks of __get_user()/__put_user() return values Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-04-23 04:59:56 +08:00
err |= __get_user (owned_fp, &sc->sc_ownedfp);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
if (owned_fp)
err |= restore_sigcontext_fpu(sc);
}
#endif
regs->tra = -1; /* disable syscall checks */
err |= __get_user(*r0_p, &sc->sc_regs[0]);
return err;
}
sh: push extra copy of r0-r2 for syscall parameters When invoking syscall handlers on sh32, the saved userspace registers are at the top of the stack. This seems to have been intentional, as it is an easy way to pass r0, r1, ... to the handler as parameters 5, 6, ... It causes problems, however, because the compiler is allowed to generate code for a function which clobbers that function's own parameters. For example, gcc generates the following code for clone: <SyS_clone>: mov.l 8c020714 <SyS_clone+0xc>,r1 ! 8c020540 <do_fork> mov.l r7,@r15 mov r6,r7 jmp @r1 mov #0,r6 nop .word 0x0540 .word 0x8c02 The `mov.l r7,@r15` clobbers the saved value of r0 passed from userspace. For most system calls, this might not be a problem, because we'll be overwriting r0 with the return value anyway. But in the case of clone, copy_thread will need the original value of r0 if the CLONE_SETTLS flag was specified. The first patch in this series fixes this issue for system calls by pushing to the stack and extra copy of r0-r2 before invoking the handler. We discard this copy before restoring the userspace registers, so it is not a problem if they are clobbered. Exception handlers also receive the userspace register values in a similar manner, and may hit the same problem. The second patch removes the do_fpu_error handler, which looks susceptible to this problem and which, as far as I can tell, has not been used in some time. The third patch addresses other exception handlers. This patch (of 3): The userspace registers are stored at the top of the stack when the syscall handler is invoked, which allows r0-r2 to act as parameters 5-7. Parameters passed on the stack may be clobbered by the syscall handler. The solution is to push an extra copy of the registers which might be used as syscall parameters to the stack, so that the authoritative set of saved register values does not get clobbered. A few system call handlers are also updated to get the userspace registers using current_pt_regs() instead of from the stack. Signed-off-by: Bobby Bingham <koorogi@koorogi.info> Cc: Paul Mundt <paul.mundt@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-04-04 05:46:39 +08:00
asmlinkage int sys_sigreturn(void)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
{
sh: push extra copy of r0-r2 for syscall parameters When invoking syscall handlers on sh32, the saved userspace registers are at the top of the stack. This seems to have been intentional, as it is an easy way to pass r0, r1, ... to the handler as parameters 5, 6, ... It causes problems, however, because the compiler is allowed to generate code for a function which clobbers that function's own parameters. For example, gcc generates the following code for clone: <SyS_clone>: mov.l 8c020714 <SyS_clone+0xc>,r1 ! 8c020540 <do_fork> mov.l r7,@r15 mov r6,r7 jmp @r1 mov #0,r6 nop .word 0x0540 .word 0x8c02 The `mov.l r7,@r15` clobbers the saved value of r0 passed from userspace. For most system calls, this might not be a problem, because we'll be overwriting r0 with the return value anyway. But in the case of clone, copy_thread will need the original value of r0 if the CLONE_SETTLS flag was specified. The first patch in this series fixes this issue for system calls by pushing to the stack and extra copy of r0-r2 before invoking the handler. We discard this copy before restoring the userspace registers, so it is not a problem if they are clobbered. Exception handlers also receive the userspace register values in a similar manner, and may hit the same problem. The second patch removes the do_fpu_error handler, which looks susceptible to this problem and which, as far as I can tell, has not been used in some time. The third patch addresses other exception handlers. This patch (of 3): The userspace registers are stored at the top of the stack when the syscall handler is invoked, which allows r0-r2 to act as parameters 5-7. Parameters passed on the stack may be clobbered by the syscall handler. The solution is to push an extra copy of the registers which might be used as syscall parameters to the stack, so that the authoritative set of saved register values does not get clobbered. A few system call handlers are also updated to get the userspace registers using current_pt_regs() instead of from the stack. Signed-off-by: Bobby Bingham <koorogi@koorogi.info> Cc: Paul Mundt <paul.mundt@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-04-04 05:46:39 +08:00
struct pt_regs *regs = current_pt_regs();
sh: gcc4 support. This fixes up the kernel for gcc4. The existing exception handlers needed some wrapping for pt_regs access, acessing the registers via a RELOC_HIDE() pointer. The strcpy() issues popped up here too, so add -ffreestanding and kill off the symbol export. Signed-off-by: Stuart Menefy <stuart.menefy@st.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-11-21 10:16:57 +08:00
struct sigframe __user *frame = (struct sigframe __user *)regs->regs[15];
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
sigset_t set;
int r0;
sh: Force pending restarted system calls to return -EINTR. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2008-09-24 13:37:35 +08:00
/* Always make any pending restarted system calls return -EINTR */
current_thread_info()->restart_block.fn = do_no_restart_syscall;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
goto badframe;
if (__get_user(set.sig[0], &frame->sc.oldmask)
|| (_NSIG_WORDS > 1
&& __copy_from_user(&set.sig[1], &frame->extramask,
sizeof(frame->extramask))))
goto badframe;
sh: use set_current_blocked() and block_sigmask() As described in e6fa16ab ("signal: sigprocmask() should do retarget_shared_pending()") the modification of current->blocked is incorrect as we need to check whether the signal we're about to block is pending in the shared queue. Also, use the new helper function introduced in commit 5e6292c0f28f ("signal: add block_sigmask() for adding sigmask to current->blocked") which centralises the code for updating current->blocked after successfully delivering a signal and reduces the amount of duplicate code across architectures. In the past some architectures got this code wrong, so using this helper function should stop that from happening again. Acked-by: Oleg Nesterov <oleg@redhat.com> Cc: Paul Mundt <lethal@linux-sh.org> Signed-off-by: Matt Fleming <matt.fleming@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2012-03-29 06:16:32 +08:00
set_current_blocked(&set);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
sh: gcc4 support. This fixes up the kernel for gcc4. The existing exception handlers needed some wrapping for pt_regs access, acessing the registers via a RELOC_HIDE() pointer. The strcpy() issues popped up here too, so add -ffreestanding and kill off the symbol export. Signed-off-by: Stuart Menefy <stuart.menefy@st.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-11-21 10:16:57 +08:00
if (restore_sigcontext(regs, &frame->sc, &r0))
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
goto badframe;
return r0;
badframe:
force_sig(SIGSEGV, current);
return 0;
}
sh: push extra copy of r0-r2 for syscall parameters When invoking syscall handlers on sh32, the saved userspace registers are at the top of the stack. This seems to have been intentional, as it is an easy way to pass r0, r1, ... to the handler as parameters 5, 6, ... It causes problems, however, because the compiler is allowed to generate code for a function which clobbers that function's own parameters. For example, gcc generates the following code for clone: <SyS_clone>: mov.l 8c020714 <SyS_clone+0xc>,r1 ! 8c020540 <do_fork> mov.l r7,@r15 mov r6,r7 jmp @r1 mov #0,r6 nop .word 0x0540 .word 0x8c02 The `mov.l r7,@r15` clobbers the saved value of r0 passed from userspace. For most system calls, this might not be a problem, because we'll be overwriting r0 with the return value anyway. But in the case of clone, copy_thread will need the original value of r0 if the CLONE_SETTLS flag was specified. The first patch in this series fixes this issue for system calls by pushing to the stack and extra copy of r0-r2 before invoking the handler. We discard this copy before restoring the userspace registers, so it is not a problem if they are clobbered. Exception handlers also receive the userspace register values in a similar manner, and may hit the same problem. The second patch removes the do_fpu_error handler, which looks susceptible to this problem and which, as far as I can tell, has not been used in some time. The third patch addresses other exception handlers. This patch (of 3): The userspace registers are stored at the top of the stack when the syscall handler is invoked, which allows r0-r2 to act as parameters 5-7. Parameters passed on the stack may be clobbered by the syscall handler. The solution is to push an extra copy of the registers which might be used as syscall parameters to the stack, so that the authoritative set of saved register values does not get clobbered. A few system call handlers are also updated to get the userspace registers using current_pt_regs() instead of from the stack. Signed-off-by: Bobby Bingham <koorogi@koorogi.info> Cc: Paul Mundt <paul.mundt@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-04-04 05:46:39 +08:00
asmlinkage int sys_rt_sigreturn(void)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
{
sh: push extra copy of r0-r2 for syscall parameters When invoking syscall handlers on sh32, the saved userspace registers are at the top of the stack. This seems to have been intentional, as it is an easy way to pass r0, r1, ... to the handler as parameters 5, 6, ... It causes problems, however, because the compiler is allowed to generate code for a function which clobbers that function's own parameters. For example, gcc generates the following code for clone: <SyS_clone>: mov.l 8c020714 <SyS_clone+0xc>,r1 ! 8c020540 <do_fork> mov.l r7,@r15 mov r6,r7 jmp @r1 mov #0,r6 nop .word 0x0540 .word 0x8c02 The `mov.l r7,@r15` clobbers the saved value of r0 passed from userspace. For most system calls, this might not be a problem, because we'll be overwriting r0 with the return value anyway. But in the case of clone, copy_thread will need the original value of r0 if the CLONE_SETTLS flag was specified. The first patch in this series fixes this issue for system calls by pushing to the stack and extra copy of r0-r2 before invoking the handler. We discard this copy before restoring the userspace registers, so it is not a problem if they are clobbered. Exception handlers also receive the userspace register values in a similar manner, and may hit the same problem. The second patch removes the do_fpu_error handler, which looks susceptible to this problem and which, as far as I can tell, has not been used in some time. The third patch addresses other exception handlers. This patch (of 3): The userspace registers are stored at the top of the stack when the syscall handler is invoked, which allows r0-r2 to act as parameters 5-7. Parameters passed on the stack may be clobbered by the syscall handler. The solution is to push an extra copy of the registers which might be used as syscall parameters to the stack, so that the authoritative set of saved register values does not get clobbered. A few system call handlers are also updated to get the userspace registers using current_pt_regs() instead of from the stack. Signed-off-by: Bobby Bingham <koorogi@koorogi.info> Cc: Paul Mundt <paul.mundt@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-04-04 05:46:39 +08:00
struct pt_regs *regs = current_pt_regs();
sh: gcc4 support. This fixes up the kernel for gcc4. The existing exception handlers needed some wrapping for pt_regs access, acessing the registers via a RELOC_HIDE() pointer. The strcpy() issues popped up here too, so add -ffreestanding and kill off the symbol export. Signed-off-by: Stuart Menefy <stuart.menefy@st.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-11-21 10:16:57 +08:00
struct rt_sigframe __user *frame = (struct rt_sigframe __user *)regs->regs[15];
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
sigset_t set;
int r0;
sh: Force pending restarted system calls to return -EINTR. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2008-09-24 13:37:35 +08:00
/* Always make any pending restarted system calls return -EINTR */
current_thread_info()->restart_block.fn = do_no_restart_syscall;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
goto badframe;
if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set)))
goto badframe;
sh: use set_current_blocked() and block_sigmask() As described in e6fa16ab ("signal: sigprocmask() should do retarget_shared_pending()") the modification of current->blocked is incorrect as we need to check whether the signal we're about to block is pending in the shared queue. Also, use the new helper function introduced in commit 5e6292c0f28f ("signal: add block_sigmask() for adding sigmask to current->blocked") which centralises the code for updating current->blocked after successfully delivering a signal and reduces the amount of duplicate code across architectures. In the past some architectures got this code wrong, so using this helper function should stop that from happening again. Acked-by: Oleg Nesterov <oleg@redhat.com> Cc: Paul Mundt <lethal@linux-sh.org> Signed-off-by: Matt Fleming <matt.fleming@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2012-03-29 06:16:32 +08:00
set_current_blocked(&set);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
sh: gcc4 support. This fixes up the kernel for gcc4. The existing exception handlers needed some wrapping for pt_regs access, acessing the registers via a RELOC_HIDE() pointer. The strcpy() issues popped up here too, so add -ffreestanding and kill off the symbol export. Signed-off-by: Stuart Menefy <stuart.menefy@st.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-11-21 10:16:57 +08:00
if (restore_sigcontext(regs, &frame->uc.uc_mcontext, &r0))
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
goto badframe;
sh: switch to generic sigaltstack Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-12-23 16:46:05 +08:00
if (restore_altstack(&frame->uc.uc_stack))
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
goto badframe;
return r0;
badframe:
force_sig(SIGSEGV, current);
return 0;
sh: Handle -ERESTART_RESTARTBLOCK for restartable syscalls. The current implementation only handles -ERESTARTNOHAND, whereas we also need to handle -ERESTART_RESTARTBLOCK in the handle_signal() case for restartable system calls. As noted by Carl: This fixes the LTP test nanosleep03 - the current kernel causes -ERESTART_RESTARTBLOCK to reach user space rather than the correct -EINTR. Reported-by: Carl Shaw <shaw.carl@gmail.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-06-19 11:33:21 +08:00
}
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
/*
* Set up a signal frame.
*/
static int
setup_sigcontext(struct sigcontext __user *sc, struct pt_regs *regs,
unsigned long mask)
{
int err = 0;
#define COPY(x) err |= __put_user(regs->x, &sc->sc_##x)
COPY(regs[0]); COPY(regs[1]);
COPY(regs[2]); COPY(regs[3]);
COPY(regs[4]); COPY(regs[5]);
COPY(regs[6]); COPY(regs[7]);
COPY(regs[8]); COPY(regs[9]);
COPY(regs[10]); COPY(regs[11]);
COPY(regs[12]); COPY(regs[13]);
COPY(regs[14]); COPY(regs[15]);
COPY(gbr); COPY(mach);
COPY(macl); COPY(pr);
COPY(sr); COPY(pc);
#undef COPY
#ifdef CONFIG_SH_FPU
err |= save_sigcontext_fpu(sc, regs);
#endif
/* non-iBCS2 extensions.. */
err |= __put_user(mask, &sc->oldmask);
return err;
}
/*
* Determine which stack to use..
*/
static inline void __user *
get_sigframe(struct k_sigaction *ka, unsigned long sp, size_t frame_size)
{
if (ka->sa.sa_flags & SA_ONSTACK) {
if (sas_ss_flags(sp) == 0)
sp = current->sas_ss_sp + current->sas_ss_size;
}
sh: Improve unwind info for signals GCC does not issue unwind information for function epilogues. Unfortunately we can catch a signal during an epilogue. The signal handler writes the current context and signal return code onto the stack overwriting previous contents. During unwinding, libgcc can try to restore registers from the stack and restores corrupted ones. This can lead to segmentation, misaligned access and sigbus faults. For example, consider the following code: mov.l r12,@-r15 mov.l r14,@-r15 sts.l pr,@-r15 mov r15,r14 <do stuff> mov r14, r15 lds.l @r15+, pr <<< SIGNAL HERE mov.l @r15+, r14 mov.l @r15+, r12 rts Unwind is aware that pr was pushed to stack in prolog, so tries to restore it. Unfortunately it restores the last word of the signal handler code placed on the stack by the kernel. This patch tries to avoid the problem by adding a guard region on the stack between where the function pushes data and where the signal handler pushes its return code. We probably don't see this problem often because exception handling unwinding in an epilogue only occurs due to a pthread cancel signal. Also the kernel signal stack handler alignment of 8 bytes could hide the occurance of this problem sometimes as the stack may not be trampled at a particular required word. This is not guaranteed to always work. It relies on a frame pointer existing for the function (so it can get the correct sp value) which is not always the case for the SH4. Modifications will also be made to libgcc for the case where there is no fp. Signed-off-by: Carl Shaw <carl.shaw@st.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-08-24 14:07:08 +08:00
return (void __user *)((sp - (frame_size+UNWINDGUARD)) & -8ul);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
}
sh: Initial vsyscall page support. This implements initial support for the vsyscall page on SH. At the moment we leave it configurable due to having nommu to support from the same code base. We hook it up for the signal trampoline return at present, with more to be added later, once uClibc catches up. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-09-27 17:33:49 +08:00
/* These symbols are defined with the addresses in the vsyscall page.
See vsyscall-trapa.S. */
sh: Fix declaration of __kernel_sigreturn and __kernel_rt_sigreturn GCC 4.5.0 complains about the declaration of variables __kernel_sigreturn and __kernel_rt_sigreturn because they have type void. Correctly declare these symbols as functions to fix the following error, arch/sh/kernel/signal_32.c: In function 'setup_frame': arch/sh/kernel/signal_32.c:368:14: error: taking address of expression of type 'void' arch/sh/kernel/signal_32.c: In function 'setup_rt_frame': arch/sh/kernel/signal_32.c:452:14: error: taking address of expression of type 'void' make[1]: *** [arch/sh/kernel/signal_32.o] Error 1 make: *** [arch/sh/kernel] Error 2 Signed-off-by: Matt Fleming <matt@console-pimps.org> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-06-18 17:03:33 +08:00
extern void __kernel_sigreturn(void);
extern void __kernel_rt_sigreturn(void);
sh: Initial vsyscall page support. This implements initial support for the vsyscall page on SH. At the moment we leave it configurable due to having nommu to support from the same code base. We hook it up for the signal trampoline return at present, with more to be added later, once uClibc catches up. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-09-27 17:33:49 +08:00
sh: Use get_signal() signal_setup_done() Use the more generic functions get_signal() signal_setup_done() for signal delivery. Signed-off-by: Richard Weinberger <richard@nod.at>
2013-10-07 20:51:14 +08:00
static int setup_frame(struct ksignal *ksig, sigset_t *set,
struct pt_regs *regs)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
{
struct sigframe __user *frame;
sh: Use get_signal() signal_setup_done() Use the more generic functions get_signal() signal_setup_done() for signal delivery. Signed-off-by: Richard Weinberger <richard@nod.at>
2013-10-07 20:51:14 +08:00
int err = 0, sig = ksig->sig;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
int signal;
sh: Use get_signal() signal_setup_done() Use the more generic functions get_signal() signal_setup_done() for signal delivery. Signed-off-by: Richard Weinberger <richard@nod.at>
2013-10-07 20:51:14 +08:00
frame = get_sigframe(&ksig->ka, regs->regs[15], sizeof(*frame));
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
sh: Use get_signal() signal_setup_done() Use the more generic functions get_signal() signal_setup_done() for signal delivery. Signed-off-by: Richard Weinberger <richard@nod.at>
2013-10-07 20:51:14 +08:00
return -EFAULT;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
signal = current_thread_info()->exec_domain
&& current_thread_info()->exec_domain->signal_invmap
&& sig < 32
? current_thread_info()->exec_domain->signal_invmap[sig]
: sig;
err |= setup_sigcontext(&frame->sc, regs, set->sig[0]);
sh: pselect6 and ppoll, along with signal trampoline rework. This implements support for ppoll() and pselect6().. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-09-27 16:27:00 +08:00
if (_NSIG_WORDS > 1)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
err |= __copy_to_user(frame->extramask, &set->sig[1],
sizeof(frame->extramask));
/* Set up to return from userspace. If provided, use a stub
already in userspace. */
sh: Use get_signal() signal_setup_done() Use the more generic functions get_signal() signal_setup_done() for signal delivery. Signed-off-by: Richard Weinberger <richard@nod.at>
2013-10-07 20:51:14 +08:00
if (ksig->ka.sa.sa_flags & SA_RESTORER) {
regs->pr = (unsigned long) ksig->ka.sa.sa_restorer;
sh: Initial vsyscall page support. This implements initial support for the vsyscall page on SH. At the moment we leave it configurable due to having nommu to support from the same code base. We hook it up for the signal trampoline return at present, with more to be added later, once uClibc catches up. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-09-27 17:33:49 +08:00
#ifdef CONFIG_VSYSCALL
} else if (likely(current->mm->context.vdso)) {
regs->pr = VDSO_SYM(&__kernel_sigreturn);
#endif
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
} else {
/* Generate return code (system call to sigreturn) */
err |= __put_user(MOVW(7), &frame->retcode[0]);
sh: Add support for SH7206 and SH7619 CPU subtypes. This implements initial support for the SH7206 (SH-2A) and SH7619 (SH-2) MMU-less CPUs. Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-11-05 14:40:13 +08:00
err |= __put_user(TRAP_NOARG, &frame->retcode[1]);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
err |= __put_user(OR_R0_R0, &frame->retcode[2]);
err |= __put_user(OR_R0_R0, &frame->retcode[3]);
err |= __put_user(OR_R0_R0, &frame->retcode[4]);
err |= __put_user(OR_R0_R0, &frame->retcode[5]);
err |= __put_user(OR_R0_R0, &frame->retcode[6]);
err |= __put_user((__NR_sigreturn), &frame->retcode[7]);
regs->pr = (unsigned long) frame->retcode;
sh: Conditionally re-enable IRQs in fault path. The current kernel behaviour is to reenable interrupts unconditionally when taking a page fault. This patch changes this to only enable them if interrupts were previously enabled. It also fixes a problem seen with this fix in place: the kernel previously flushed the vsyscall page when handling a signal, which is not only unncessary, but caused a possible sleep with interrupts disabled. Signed-off-by: Stuart Menefy <stuart.menefy@st.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2008-07-02 16:51:23 +08:00
flush_icache_range(regs->pr, regs->pr + sizeof(frame->retcode));
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
}
if (err)
sh: Use get_signal() signal_setup_done() Use the more generic functions get_signal() signal_setup_done() for signal delivery. Signed-off-by: Richard Weinberger <richard@nod.at>
2013-10-07 20:51:14 +08:00
return -EFAULT;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
/* Set up registers for signal handler */
regs->regs[15] = (unsigned long) frame;
regs->regs[4] = signal; /* Arg for signal handler */
regs->regs[5] = 0;
regs->regs[6] = (unsigned long) &frame->sc;
sh: Initial ELF FDPIC support. This adds initial support for ELF FDPIC on MMU-less SH, as per version 0.2 of the ABI definition at: http://www.codesourcery.com/public/docs/sh-fdpic/sh-fdpic-abi.txt Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2008-05-19 12:40:12 +08:00
if (current->personality & FDPIC_FUNCPTRS) {
struct fdpic_func_descriptor __user *funcptr =
sh: Use get_signal() signal_setup_done() Use the more generic functions get_signal() signal_setup_done() for signal delivery. Signed-off-by: Richard Weinberger <richard@nod.at>
2013-10-07 20:51:14 +08:00
(struct fdpic_func_descriptor __user *)ksig->ka.sa.sa_handler;
sh: Initial ELF FDPIC support. This adds initial support for ELF FDPIC on MMU-less SH, as per version 0.2 of the ABI definition at: http://www.codesourcery.com/public/docs/sh-fdpic/sh-fdpic-abi.txt Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2008-05-19 12:40:12 +08:00
sh: missing checks of __get_user()/__put_user() return values Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-04-23 04:59:56 +08:00
err |= __get_user(regs->pc, &funcptr->text);
err |= __get_user(regs->regs[12], &funcptr->GOT);
sh: Initial ELF FDPIC support. This adds initial support for ELF FDPIC on MMU-less SH, as per version 0.2 of the ABI definition at: http://www.codesourcery.com/public/docs/sh-fdpic/sh-fdpic-abi.txt Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2008-05-19 12:40:12 +08:00
} else
sh: Use get_signal() signal_setup_done() Use the more generic functions get_signal() signal_setup_done() for signal delivery. Signed-off-by: Richard Weinberger <richard@nod.at>
2013-10-07 20:51:14 +08:00
regs->pc = (unsigned long)ksig->ka.sa.sa_handler;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
sh: missing checks of __get_user()/__put_user() return values Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-04-23 04:59:56 +08:00
if (err)
sh: Use get_signal() signal_setup_done() Use the more generic functions get_signal() signal_setup_done() for signal delivery. Signed-off-by: Richard Weinberger <richard@nod.at>
2013-10-07 20:51:14 +08:00
return -EFAULT;
sh: missing checks of __get_user()/__put_user() return values Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-04-23 04:59:56 +08:00
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
set_fs(USER_DS);
sh: pselect6 and ppoll, along with signal trampoline rework. This implements support for ppoll() and pselect6().. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-09-27 16:27:00 +08:00
pr_debug("SIG deliver (%s:%d): sp=%p pc=%08lx pr=%08lx\n",
Use helpers to obtain task pid in printks (arch code) One of the easiest things to isolate is the pid printed in kernel log. There was a patch, that made this for arch-independent code, this one makes so for arch/xxx files. It took some time to cross-compile it, but hopefully these are all the printks in arch code. Signed-off-by: Alexey Dobriyan <adobriyan@openvz.org> Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Cc: <linux-arch@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-19 14:40:41 +08:00
current->comm, task_pid_nr(current), frame, regs->pc, regs->pr);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
sh: pselect6 and ppoll, along with signal trampoline rework. This implements support for ppoll() and pselect6().. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-09-27 16:27:00 +08:00
return 0;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
}
sh: Use get_signal() signal_setup_done() Use the more generic functions get_signal() signal_setup_done() for signal delivery. Signed-off-by: Richard Weinberger <richard@nod.at>
2013-10-07 20:51:14 +08:00
static int setup_rt_frame(struct ksignal *ksig, sigset_t *set,
struct pt_regs *regs)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
{
struct rt_sigframe __user *frame;
sh: Use get_signal() signal_setup_done() Use the more generic functions get_signal() signal_setup_done() for signal delivery. Signed-off-by: Richard Weinberger <richard@nod.at>
2013-10-07 20:51:14 +08:00
int err = 0, sig = ksig->sig;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
int signal;
sh: Use get_signal() signal_setup_done() Use the more generic functions get_signal() signal_setup_done() for signal delivery. Signed-off-by: Richard Weinberger <richard@nod.at>
2013-10-07 20:51:14 +08:00
frame = get_sigframe(&ksig->ka, regs->regs[15], sizeof(*frame));
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
sh: Use get_signal() signal_setup_done() Use the more generic functions get_signal() signal_setup_done() for signal delivery. Signed-off-by: Richard Weinberger <richard@nod.at>
2013-10-07 20:51:14 +08:00
return -EFAULT;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
signal = current_thread_info()->exec_domain
&& current_thread_info()->exec_domain->signal_invmap
&& sig < 32
? current_thread_info()->exec_domain->signal_invmap[sig]
: sig;
sh: Use get_signal() signal_setup_done() Use the more generic functions get_signal() signal_setup_done() for signal delivery. Signed-off-by: Richard Weinberger <richard@nod.at>
2013-10-07 20:51:14 +08:00
err |= copy_siginfo_to_user(&frame->info, &ksig->info);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
/* Create the ucontext. */
err |= __put_user(0, &frame->uc.uc_flags);
sh: fixup many sparse errors. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2008-09-04 17:53:58 +08:00
err |= __put_user(NULL, &frame->uc.uc_link);
sh: switch to generic sigaltstack Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-12-23 16:46:05 +08:00
err |= __save_altstack(&frame->uc.uc_stack, regs->regs[15]);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
err |= setup_sigcontext(&frame->uc.uc_mcontext,
regs, set->sig[0]);
err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
/* Set up to return from userspace. If provided, use a stub
already in userspace. */
sh: Use get_signal() signal_setup_done() Use the more generic functions get_signal() signal_setup_done() for signal delivery. Signed-off-by: Richard Weinberger <richard@nod.at>
2013-10-07 20:51:14 +08:00
if (ksig->ka.sa.sa_flags & SA_RESTORER) {
regs->pr = (unsigned long) ksig->ka.sa.sa_restorer;
sh: Initial vsyscall page support. This implements initial support for the vsyscall page on SH. At the moment we leave it configurable due to having nommu to support from the same code base. We hook it up for the signal trampoline return at present, with more to be added later, once uClibc catches up. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-09-27 17:33:49 +08:00
#ifdef CONFIG_VSYSCALL
} else if (likely(current->mm->context.vdso)) {
regs->pr = VDSO_SYM(&__kernel_rt_sigreturn);
#endif
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
} else {
/* Generate return code (system call to rt_sigreturn) */
err |= __put_user(MOVW(7), &frame->retcode[0]);
sh: Add support for SH7206 and SH7619 CPU subtypes. This implements initial support for the SH7206 (SH-2A) and SH7619 (SH-2) MMU-less CPUs. Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-11-05 14:40:13 +08:00
err |= __put_user(TRAP_NOARG, &frame->retcode[1]);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
err |= __put_user(OR_R0_R0, &frame->retcode[2]);
err |= __put_user(OR_R0_R0, &frame->retcode[3]);
err |= __put_user(OR_R0_R0, &frame->retcode[4]);
err |= __put_user(OR_R0_R0, &frame->retcode[5]);
err |= __put_user(OR_R0_R0, &frame->retcode[6]);
err |= __put_user((__NR_rt_sigreturn), &frame->retcode[7]);
regs->pr = (unsigned long) frame->retcode;
sh: Optimize the setup_rt_frame() I-cache flush. This only needs to flush the return code via the legacy path, and just invalidates uselessly otherwise. This makes the behaviour consistent for all of the trampoline setup paths. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-10-14 13:21:40 +08:00
flush_icache_range(regs->pr, regs->pr + sizeof(frame->retcode));
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
}
if (err)
sh: Use get_signal() signal_setup_done() Use the more generic functions get_signal() signal_setup_done() for signal delivery. Signed-off-by: Richard Weinberger <richard@nod.at>
2013-10-07 20:51:14 +08:00
return -EFAULT;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
/* Set up registers for signal handler */
regs->regs[15] = (unsigned long) frame;
regs->regs[4] = signal; /* Arg for signal handler */
regs->regs[5] = (unsigned long) &frame->info;
regs->regs[6] = (unsigned long) &frame->uc;
sh: Initial ELF FDPIC support. This adds initial support for ELF FDPIC on MMU-less SH, as per version 0.2 of the ABI definition at: http://www.codesourcery.com/public/docs/sh-fdpic/sh-fdpic-abi.txt Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2008-05-19 12:40:12 +08:00
if (current->personality & FDPIC_FUNCPTRS) {
struct fdpic_func_descriptor __user *funcptr =
sh: Use get_signal() signal_setup_done() Use the more generic functions get_signal() signal_setup_done() for signal delivery. Signed-off-by: Richard Weinberger <richard@nod.at>
2013-10-07 20:51:14 +08:00
(struct fdpic_func_descriptor __user *)ksig->ka.sa.sa_handler;
sh: Initial ELF FDPIC support. This adds initial support for ELF FDPIC on MMU-less SH, as per version 0.2 of the ABI definition at: http://www.codesourcery.com/public/docs/sh-fdpic/sh-fdpic-abi.txt Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2008-05-19 12:40:12 +08:00
sh: missing checks of __get_user()/__put_user() return values Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-04-23 04:59:56 +08:00
err |= __get_user(regs->pc, &funcptr->text);
err |= __get_user(regs->regs[12], &funcptr->GOT);
sh: Initial ELF FDPIC support. This adds initial support for ELF FDPIC on MMU-less SH, as per version 0.2 of the ABI definition at: http://www.codesourcery.com/public/docs/sh-fdpic/sh-fdpic-abi.txt Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2008-05-19 12:40:12 +08:00
} else
sh: Use get_signal() signal_setup_done() Use the more generic functions get_signal() signal_setup_done() for signal delivery. Signed-off-by: Richard Weinberger <richard@nod.at>
2013-10-07 20:51:14 +08:00
regs->pc = (unsigned long)ksig->ka.sa.sa_handler;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
sh: missing checks of __get_user()/__put_user() return values Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-04-23 04:59:56 +08:00
if (err)
sh: Use get_signal() signal_setup_done() Use the more generic functions get_signal() signal_setup_done() for signal delivery. Signed-off-by: Richard Weinberger <richard@nod.at>
2013-10-07 20:51:14 +08:00
return -EFAULT;
sh: missing checks of __get_user()/__put_user() return values Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-04-23 04:59:56 +08:00
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
set_fs(USER_DS);
sh: pselect6 and ppoll, along with signal trampoline rework. This implements support for ppoll() and pselect6().. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-09-27 16:27:00 +08:00
pr_debug("SIG deliver (%s:%d): sp=%p pc=%08lx pr=%08lx\n",
Use helpers to obtain task pid in printks (arch code) One of the easiest things to isolate is the pid printed in kernel log. There was a patch, that made this for arch-independent code, this one makes so for arch/xxx files. It took some time to cross-compile it, but hopefully these are all the printks in arch code. Signed-off-by: Alexey Dobriyan <adobriyan@openvz.org> Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Cc: <linux-arch@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-19 14:40:41 +08:00
current->comm, task_pid_nr(current), frame, regs->pc, regs->pr);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
sh: pselect6 and ppoll, along with signal trampoline rework. This implements support for ppoll() and pselect6().. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-09-27 16:27:00 +08:00
return 0;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
}
sh: Flag T-bit for syscall restart. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2008-09-12 21:08:20 +08:00
static inline void
handle_syscall_restart(unsigned long save_r0, struct pt_regs *regs,
struct sigaction *sa)
{
/* If we're not from a syscall, bail out */
if (regs->tra < 0)
return;
/* check for system call restart.. */
switch (regs->regs[0]) {
case -ERESTART_RESTARTBLOCK:
case -ERESTARTNOHAND:
no_system_call_restart:
regs->regs[0] = -EINTR;
break;
case -ERESTARTSYS:
if (!(sa->sa_flags & SA_RESTART))
goto no_system_call_restart;
/* fallthrough */
case -ERESTARTNOINTR:
regs->regs[0] = save_r0;
sh: Mass ctrl_in/outX to __raw_read/writeX conversion. The old ctrl in/out routines are non-portable and unsuitable for cross-platform use. While drivers/sh has already been sanitized, there is still quite a lot of code that is not. This converts the arch/sh/ bits over, which permits us to flag the routines as deprecated whilst still building with -Werror for the architecture code, and to ensure that future users are not added. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-01-26 11:58:40 +08:00
regs->pc -= instruction_size(__raw_readw(regs->pc - 4));
sh: Flag T-bit for syscall restart. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2008-09-12 21:08:20 +08:00
break;
}
}
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
/*
* OK, we're invoking a handler
*/
pull clearing RESTORE_SIGMASK into block_sigmask() Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-05-22 11:42:15 +08:00
static void
sh: Use get_signal() signal_setup_done() Use the more generic functions get_signal() signal_setup_done() for signal delivery. Signed-off-by: Richard Weinberger <richard@nod.at>
2013-10-07 20:51:14 +08:00
handle_signal(struct ksignal *ksig, struct pt_regs *regs, unsigned int save_r0)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
{
new helper: sigmask_to_save() replace boilerplate "should we use ->saved_sigmask or ->blocked?" with calls of obvious inlined helper... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-05-02 21:59:21 +08:00
sigset_t *oldset = sigmask_to_save();
sh: pselect6 and ppoll, along with signal trampoline rework. This implements support for ppoll() and pselect6().. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-09-27 16:27:00 +08:00
int ret;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
/* Set up the stack frame */
sh: Use get_signal() signal_setup_done() Use the more generic functions get_signal() signal_setup_done() for signal delivery. Signed-off-by: Richard Weinberger <richard@nod.at>
2013-10-07 20:51:14 +08:00
if (ksig->ka.sa.sa_flags & SA_SIGINFO)
ret = setup_rt_frame(ksig, oldset, regs);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
else
sh: Use get_signal() signal_setup_done() Use the more generic functions get_signal() signal_setup_done() for signal delivery. Signed-off-by: Richard Weinberger <richard@nod.at>
2013-10-07 20:51:14 +08:00
ret = setup_frame(ksig, oldset, regs);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
sh: Use get_signal() signal_setup_done() Use the more generic functions get_signal() signal_setup_done() for signal delivery. Signed-off-by: Richard Weinberger <richard@nod.at>
2013-10-07 20:51:14 +08:00
signal_setup_done(ret, ksig, test_thread_flag(TIF_SINGLESTEP));
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
}
/*
* Note that 'init' is a special process: it doesn't get signals it doesn't
* want to handle. Thus you cannot kill init even with a SIGKILL even by
* mistake.
*
* Note that we go through the signals twice: once to check the signals that
* the kernel can handle, and then we build all the user-level signal handling
* stack-frames in one go after that.
*/
sh: pselect6 and ppoll, along with signal trampoline rework. This implements support for ppoll() and pselect6().. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-09-27 16:27:00 +08:00
static void do_signal(struct pt_regs *regs, unsigned int save_r0)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
{
sh: Use get_signal() signal_setup_done() Use the more generic functions get_signal() signal_setup_done() for signal delivery. Signed-off-by: Richard Weinberger <richard@nod.at>
2013-10-07 20:51:14 +08:00
struct ksignal ksig;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
/*
* 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(regs))
sh: pselect6 and ppoll, along with signal trampoline rework. This implements support for ppoll() and pselect6().. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-09-27 16:27:00 +08:00
return;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
sh: Use get_signal() signal_setup_done() Use the more generic functions get_signal() signal_setup_done() for signal delivery. Signed-off-by: Richard Weinberger <richard@nod.at>
2013-10-07 20:51:14 +08:00
if (get_signal(&ksig)) {
handle_syscall_restart(save_r0, regs, &ksig.ka.sa);
sh: Flag T-bit for syscall restart. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2008-09-12 21:08:20 +08:00
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
/* Whee! Actually deliver the signal. */
sh: Use get_signal() signal_setup_done() Use the more generic functions get_signal() signal_setup_done() for signal delivery. Signed-off-by: Richard Weinberger <richard@nod.at>
2013-10-07 20:51:14 +08:00
handle_signal(&ksig, regs, save_r0);
sh: Fix sigmask trampling in signal delivery. There was a missing return in do_signal() that caused the saved sigmask to be written back after having successfully delivered the signal. Signed-off-by: Ryusuke Sakato <sakato@hsdv.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-02-23 12:22:56 +08:00
return;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
}
/* Did we come from a system call? */
if (regs->tra >= 0) {
/* Restart the system call - no handlers present */
if (regs->regs[0] == -ERESTARTNOHAND ||
regs->regs[0] == -ERESTARTSYS ||
sh: __NR_restart_syscall support. This implements support for __NR_restart_syscall. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-09-27 16:22:49 +08:00
regs->regs[0] == -ERESTARTNOINTR) {
sh: Fix sigmask trampling in signal delivery. There was a missing return in do_signal() that caused the saved sigmask to be written back after having successfully delivered the signal. Signed-off-by: Ryusuke Sakato <sakato@hsdv.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-02-23 12:22:56 +08:00
regs->regs[0] = save_r0;
sh: Mass ctrl_in/outX to __raw_read/writeX conversion. The old ctrl in/out routines are non-portable and unsuitable for cross-platform use. While drivers/sh has already been sanitized, there is still quite a lot of code that is not. This converts the arch/sh/ bits over, which permits us to flag the routines as deprecated whilst still building with -Werror for the architecture code, and to ensure that future users are not added. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-01-26 11:58:40 +08:00
regs->pc -= instruction_size(__raw_readw(regs->pc - 4));
sh: __NR_restart_syscall support. This implements support for __NR_restart_syscall. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-09-27 16:22:49 +08:00
} else if (regs->regs[0] == -ERESTART_RESTARTBLOCK) {
sh: Mass ctrl_in/outX to __raw_read/writeX conversion. The old ctrl in/out routines are non-portable and unsuitable for cross-platform use. While drivers/sh has already been sanitized, there is still quite a lot of code that is not. This converts the arch/sh/ bits over, which permits us to flag the routines as deprecated whilst still building with -Werror for the architecture code, and to ensure that future users are not added. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-01-26 11:58:40 +08:00
regs->pc -= instruction_size(__raw_readw(regs->pc - 4));
sh: __NR_restart_syscall support. This implements support for __NR_restart_syscall. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-09-27 16:22:49 +08:00
regs->regs[3] = __NR_restart_syscall;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
}
}
sh: pselect6 and ppoll, along with signal trampoline rework. This implements support for ppoll() and pselect6().. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-09-27 16:27:00 +08:00
sh: TS_RESTORE_SIGMASK conversion. Replace TIF_RESTORE_SIGMASK with TS_RESTORE_SIGMASK and define our own set_restore_sigmask() function. This saves the costly SMP-safe set_bit operation, which we do not need for the sigmask flag since TIF_SIGPENDING always has to be set too. Based on the x86 and powerpc change. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-10-14 15:05:42 +08:00
/*
* If there's no signal to deliver, we just put the saved sigmask
* back.
*/
new helper: restore_saved_sigmask() first fruits of ..._restore_sigmask() helpers: now we can take boilerplate "signal didn't have a handler, clear RESTORE_SIGMASK and restore the blocked mask from ->saved_mask" into a common helper. Open-coded instances switched... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-05-22 11:33:55 +08:00
restore_saved_sigmask();
sh: pselect6 and ppoll, along with signal trampoline rework. This implements support for ppoll() and pselect6().. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-09-27 16:27:00 +08:00
}
asmlinkage void do_notify_resume(struct pt_regs *regs, unsigned int save_r0,
sh: Make syscall tracer use tracehook notifiers, add TIF_NOTIFY_RESUME. This follows the changes in commits: 7d6d637dac2050f30a1b57b0a3dc5de4a10616ba 4f72c4279eab1e5f3ed1ac4e55d4527617582392 on powerpc. Adding in TIF_NOTIFY_RESUME, and cleaning up the syscall tracing to be more generic. This is an incremental step to turning on tracehook, as well as unifying more of the ptrace and signal code across the 32/64 split. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2008-07-30 18:55:30 +08:00
unsigned long thread_info_flags)
sh: pselect6 and ppoll, along with signal trampoline rework. This implements support for ppoll() and pselect6().. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-09-27 16:27:00 +08:00
{
/* deal with pending signal delivery */
sh: Make syscall tracer use tracehook notifiers, add TIF_NOTIFY_RESUME. This follows the changes in commits: 7d6d637dac2050f30a1b57b0a3dc5de4a10616ba 4f72c4279eab1e5f3ed1ac4e55d4527617582392 on powerpc. Adding in TIF_NOTIFY_RESUME, and cleaning up the syscall tracing to be more generic. This is an incremental step to turning on tracehook, as well as unifying more of the ptrace and signal code across the 32/64 split. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2008-07-30 18:55:30 +08:00
if (thread_info_flags & _TIF_SIGPENDING)
sh: pselect6 and ppoll, along with signal trampoline rework. This implements support for ppoll() and pselect6().. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-09-27 16:27:00 +08:00
do_signal(regs, save_r0);
sh: Make syscall tracer use tracehook notifiers, add TIF_NOTIFY_RESUME. This follows the changes in commits: 7d6d637dac2050f30a1b57b0a3dc5de4a10616ba 4f72c4279eab1e5f3ed1ac4e55d4527617582392 on powerpc. Adding in TIF_NOTIFY_RESUME, and cleaning up the syscall tracing to be more generic. This is an incremental step to turning on tracehook, as well as unifying more of the ptrace and signal code across the 32/64 split. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2008-07-30 18:55:30 +08:00
if (thread_info_flags & _TIF_NOTIFY_RESUME) {
clear_thread_flag(TIF_NOTIFY_RESUME);
tracehook_notify_resume(regs);
}
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
}