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signal/openrisc: Use force_sig_fault where appropriate
Filling in struct siginfo before calling force_sig_info a tedious and error prone process, where once in a great while the wrong fields are filled out, and siginfo has been inconsistently cleared. Simplify this process by using the helper force_sig_fault. Which takes as a parameters all of the information it needs, ensures all of the fiddly bits of filling in struct siginfo are done properly and then calls force_sig_info. In short about a 5 line reduction in code for every time force_sig_info is called, which makes the calling function clearer. Cc: Jonas Bonn <jonas@southpole.se> Cc: Stefan Kristiansson <stefan.kristiansson@saunalahti.fi> Cc: Stafford Horne <shorne@gmail.com> Cc: openrisc@lists.librecores.org Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
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c046e2c693
commit
75bfb9a1c8
@ -250,28 +250,16 @@ void __init trap_init(void)
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asmlinkage void do_trap(struct pt_regs *regs, unsigned long address)
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{
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siginfo_t info;
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clear_siginfo(&info);
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info.si_signo = SIGTRAP;
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info.si_code = TRAP_TRACE;
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info.si_addr = (void *)address;
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force_sig_info(SIGTRAP, &info, current);
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force_sig_fault(SIGTRAP, TRAP_TRACE, (void __user *)address, current);
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regs->pc += 4;
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}
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asmlinkage void do_unaligned_access(struct pt_regs *regs, unsigned long address)
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{
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siginfo_t info;
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if (user_mode(regs)) {
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/* Send a SIGBUS */
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clear_siginfo(&info);
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info.si_signo = SIGBUS;
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info.si_errno = 0;
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info.si_code = BUS_ADRALN;
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info.si_addr = (void __user *)address;
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force_sig_info(SIGBUS, &info, current);
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force_sig_fault(SIGBUS, BUS_ADRALN, (void __user *)address, current);
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} else {
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printk("KERNEL: Unaligned Access 0x%.8lx\n", address);
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show_registers(regs);
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@ -282,16 +270,9 @@ asmlinkage void do_unaligned_access(struct pt_regs *regs, unsigned long address)
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asmlinkage void do_bus_fault(struct pt_regs *regs, unsigned long address)
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{
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siginfo_t info;
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if (user_mode(regs)) {
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/* Send a SIGBUS */
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clear_siginfo(&info);
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info.si_signo = SIGBUS;
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info.si_errno = 0;
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info.si_code = BUS_ADRERR;
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info.si_addr = (void *)address;
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force_sig_info(SIGBUS, &info, current);
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force_sig_fault(SIGBUS, BUS_ADRERR, (void __user *)address, current);
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} else { /* Kernel mode */
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printk("KERNEL: Bus error (SIGBUS) 0x%.8lx\n", address);
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show_registers(regs);
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@ -466,7 +447,6 @@ static inline void simulate_swa(struct pt_regs *regs, unsigned long address,
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asmlinkage void do_illegal_instruction(struct pt_regs *regs,
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unsigned long address)
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{
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siginfo_t info;
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unsigned int op;
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unsigned int insn = *((unsigned int *)address);
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@ -487,12 +467,7 @@ asmlinkage void do_illegal_instruction(struct pt_regs *regs,
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if (user_mode(regs)) {
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/* Send a SIGILL */
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clear_siginfo(&info);
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info.si_signo = SIGILL;
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info.si_errno = 0;
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info.si_code = ILL_ILLOPC;
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info.si_addr = (void *)address;
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force_sig_info(SIGBUS, &info, current);
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force_sig_fault(SIGILL, ILL_ILLOPC, (void __user *)address, current);
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} else { /* Kernel mode */
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printk("KERNEL: Illegal instruction (SIGILL) 0x%.8lx\n",
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address);
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@ -52,11 +52,10 @@ asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long address,
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struct task_struct *tsk;
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struct mm_struct *mm;
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struct vm_area_struct *vma;
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siginfo_t info;
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int si_code;
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int fault;
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unsigned int flags = FAULT_FLAG_ALLOW_RETRY | FAULT_FLAG_KILLABLE;
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clear_siginfo(&info);
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tsk = current;
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/*
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@ -98,7 +97,7 @@ asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long address,
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}
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mm = tsk->mm;
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info.si_code = SEGV_MAPERR;
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si_code = SEGV_MAPERR;
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/*
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* If we're in an interrupt or have no user
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@ -140,7 +139,7 @@ retry:
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*/
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good_area:
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info.si_code = SEGV_ACCERR;
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si_code = SEGV_ACCERR;
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/* first do some preliminary protection checks */
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@ -214,11 +213,7 @@ bad_area_nosemaphore:
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/* User mode accesses just cause a SIGSEGV */
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if (user_mode(regs)) {
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info.si_signo = SIGSEGV;
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info.si_errno = 0;
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/* info.si_code has been set above */
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info.si_addr = (void *)address;
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force_sig_info(SIGSEGV, &info, tsk);
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force_sig_fault(SIGSEGV, si_code, (void __user *)address, tsk);
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return;
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}
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@ -283,11 +278,7 @@ do_sigbus:
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* Send a sigbus, regardless of whether we were in kernel
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* or user mode.
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*/
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info.si_signo = SIGBUS;
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info.si_errno = 0;
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info.si_code = BUS_ADRERR;
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info.si_addr = (void *)address;
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force_sig_info(SIGBUS, &info, tsk);
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force_sig_fault(SIGBUS, BUS_ADRERR, (void __user *)address, tsk);
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/* Kernel mode? Handle exceptions or die */
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if (!user_mode(regs))
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