-/*
- * linux/arch/m68k/kernel/traps.c
- *
- * Copyright (C) 1993, 1994 by Hamish Macdonald
- *
- * 68040 fixes by Michael Rausch
- * 68040 fixes by Martin Apel
- * 68040 fixes and writeback by Richard Zidlicky
- * 68060 fixes by Roman Hodek
- * 68060 fixes by Jesper Skov
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file COPYING in the main directory of this archive
- * for more details.
- */
-
-/*
- * Sets up all exception vectors
- */
-
-#include <linux/sched.h>
-#include <linux/signal.h>
-#include <linux/kernel.h>
-#include <linux/mm.h>
-#include <linux/module.h>
-#include <linux/user.h>
-#include <linux/string.h>
-#include <linux/linkage.h>
-#include <linux/init.h>
-#include <linux/ptrace.h>
-#include <linux/kallsyms.h>
-
-#include <asm/setup.h>
-#include <asm/fpu.h>
-#include <asm/system.h>
-#include <asm/uaccess.h>
-#include <asm/traps.h>
-#include <asm/pgalloc.h>
-#include <asm/machdep.h>
-#include <asm/siginfo.h>
-
-/* assembler routines */
-asmlinkage void system_call(void);
-asmlinkage void buserr(void);
-asmlinkage void trap(void);
-asmlinkage void nmihandler(void);
-#ifdef CONFIG_M68KFPU_EMU
-asmlinkage void fpu_emu(void);
-#endif
-
-e_vector vectors[256];
-
-/* nmi handler for the Amiga */
-asm(".text\n"
- __ALIGN_STR "\n"
- "nmihandler: rte");
-
-/*
- * this must be called very early as the kernel might
- * use some instruction that are emulated on the 060
- * and so we're prepared for early probe attempts (e.g. nf_init).
- */
-void __init base_trap_init(void)
-{
- if (MACH_IS_SUN3X) {
- extern e_vector *sun3x_prom_vbr;
-
- __asm__ volatile ("movec %%vbr, %0" : "=r" (sun3x_prom_vbr));
- }
-
- /* setup the exception vector table */
- __asm__ volatile ("movec %0,%%vbr" : : "r" ((void*)vectors));
-
- if (CPU_IS_060) {
- /* set up ISP entry points */
- asmlinkage void unimp_vec(void) asm ("_060_isp_unimp");
-
- vectors[VEC_UNIMPII] = unimp_vec;
- }
-
- vectors[VEC_BUSERR] = buserr;
- vectors[VEC_ILLEGAL] = trap;
- vectors[VEC_SYS] = system_call;
-}
-
-void __init trap_init (void)
-{
- int i;
-
- for (i = VEC_SPUR; i <= VEC_INT7; i++)
- vectors[i] = bad_inthandler;
-
- for (i = 0; i < VEC_USER; i++)
- if (!vectors[i])
- vectors[i] = trap;
-
- for (i = VEC_USER; i < 256; i++)
- vectors[i] = bad_inthandler;
-
-#ifdef CONFIG_M68KFPU_EMU
- if (FPU_IS_EMU)
- vectors[VEC_LINE11] = fpu_emu;
-#endif
-
- if (CPU_IS_040 && !FPU_IS_EMU) {
- /* set up FPSP entry points */
- asmlinkage void dz_vec(void) asm ("dz");
- asmlinkage void inex_vec(void) asm ("inex");
- asmlinkage void ovfl_vec(void) asm ("ovfl");
- asmlinkage void unfl_vec(void) asm ("unfl");
- asmlinkage void snan_vec(void) asm ("snan");
- asmlinkage void operr_vec(void) asm ("operr");
- asmlinkage void bsun_vec(void) asm ("bsun");
- asmlinkage void fline_vec(void) asm ("fline");
- asmlinkage void unsupp_vec(void) asm ("unsupp");
-
- vectors[VEC_FPDIVZ] = dz_vec;
- vectors[VEC_FPIR] = inex_vec;
- vectors[VEC_FPOVER] = ovfl_vec;
- vectors[VEC_FPUNDER] = unfl_vec;
- vectors[VEC_FPNAN] = snan_vec;
- vectors[VEC_FPOE] = operr_vec;
- vectors[VEC_FPBRUC] = bsun_vec;
- vectors[VEC_LINE11] = fline_vec;
- vectors[VEC_FPUNSUP] = unsupp_vec;
- }
-
- if (CPU_IS_060 && !FPU_IS_EMU) {
- /* set up IFPSP entry points */
- asmlinkage void snan_vec6(void) asm ("_060_fpsp_snan");
- asmlinkage void operr_vec6(void) asm ("_060_fpsp_operr");
- asmlinkage void ovfl_vec6(void) asm ("_060_fpsp_ovfl");
- asmlinkage void unfl_vec6(void) asm ("_060_fpsp_unfl");
- asmlinkage void dz_vec6(void) asm ("_060_fpsp_dz");
- asmlinkage void inex_vec6(void) asm ("_060_fpsp_inex");
- asmlinkage void fline_vec6(void) asm ("_060_fpsp_fline");
- asmlinkage void unsupp_vec6(void) asm ("_060_fpsp_unsupp");
- asmlinkage void effadd_vec6(void) asm ("_060_fpsp_effadd");
-
- vectors[VEC_FPNAN] = snan_vec6;
- vectors[VEC_FPOE] = operr_vec6;
- vectors[VEC_FPOVER] = ovfl_vec6;
- vectors[VEC_FPUNDER] = unfl_vec6;
- vectors[VEC_FPDIVZ] = dz_vec6;
- vectors[VEC_FPIR] = inex_vec6;
- vectors[VEC_LINE11] = fline_vec6;
- vectors[VEC_FPUNSUP] = unsupp_vec6;
- vectors[VEC_UNIMPEA] = effadd_vec6;
- }
-
- /* if running on an amiga, make the NMI interrupt do nothing */
- if (MACH_IS_AMIGA) {
- vectors[VEC_INT7] = nmihandler;
- }
-}
-
-
-static const char *vec_names[] = {
- [VEC_RESETSP] = "RESET SP",
- [VEC_RESETPC] = "RESET PC",
- [VEC_BUSERR] = "BUS ERROR",
- [VEC_ADDRERR] = "ADDRESS ERROR",
- [VEC_ILLEGAL] = "ILLEGAL INSTRUCTION",
- [VEC_ZERODIV] = "ZERO DIVIDE",
- [VEC_CHK] = "CHK",
- [VEC_TRAP] = "TRAPcc",
- [VEC_PRIV] = "PRIVILEGE VIOLATION",
- [VEC_TRACE] = "TRACE",
- [VEC_LINE10] = "LINE 1010",
- [VEC_LINE11] = "LINE 1111",
- [VEC_RESV12] = "UNASSIGNED RESERVED 12",
- [VEC_COPROC] = "COPROCESSOR PROTOCOL VIOLATION",
- [VEC_FORMAT] = "FORMAT ERROR",
- [VEC_UNINT] = "UNINITIALIZED INTERRUPT",
- [VEC_RESV16] = "UNASSIGNED RESERVED 16",
- [VEC_RESV17] = "UNASSIGNED RESERVED 17",
- [VEC_RESV18] = "UNASSIGNED RESERVED 18",
- [VEC_RESV19] = "UNASSIGNED RESERVED 19",
- [VEC_RESV20] = "UNASSIGNED RESERVED 20",
- [VEC_RESV21] = "UNASSIGNED RESERVED 21",
- [VEC_RESV22] = "UNASSIGNED RESERVED 22",
- [VEC_RESV23] = "UNASSIGNED RESERVED 23",
- [VEC_SPUR] = "SPURIOUS INTERRUPT",
- [VEC_INT1] = "LEVEL 1 INT",
- [VEC_INT2] = "LEVEL 2 INT",
- [VEC_INT3] = "LEVEL 3 INT",
- [VEC_INT4] = "LEVEL 4 INT",
- [VEC_INT5] = "LEVEL 5 INT",
- [VEC_INT6] = "LEVEL 6 INT",
- [VEC_INT7] = "LEVEL 7 INT",
- [VEC_SYS] = "SYSCALL",
- [VEC_TRAP1] = "TRAP #1",
- [VEC_TRAP2] = "TRAP #2",
- [VEC_TRAP3] = "TRAP #3",
- [VEC_TRAP4] = "TRAP #4",
- [VEC_TRAP5] = "TRAP #5",
- [VEC_TRAP6] = "TRAP #6",
- [VEC_TRAP7] = "TRAP #7",
- [VEC_TRAP8] = "TRAP #8",
- [VEC_TRAP9] = "TRAP #9",
- [VEC_TRAP10] = "TRAP #10",
- [VEC_TRAP11] = "TRAP #11",
- [VEC_TRAP12] = "TRAP #12",
- [VEC_TRAP13] = "TRAP #13",
- [VEC_TRAP14] = "TRAP #14",
- [VEC_TRAP15] = "TRAP #15",
- [VEC_FPBRUC] = "FPCP BSUN",
- [VEC_FPIR] = "FPCP INEXACT",
- [VEC_FPDIVZ] = "FPCP DIV BY 0",
- [VEC_FPUNDER] = "FPCP UNDERFLOW",
- [VEC_FPOE] = "FPCP OPERAND ERROR",
- [VEC_FPOVER] = "FPCP OVERFLOW",
- [VEC_FPNAN] = "FPCP SNAN",
- [VEC_FPUNSUP] = "FPCP UNSUPPORTED OPERATION",
- [VEC_MMUCFG] = "MMU CONFIGURATION ERROR",
- [VEC_MMUILL] = "MMU ILLEGAL OPERATION ERROR",
- [VEC_MMUACC] = "MMU ACCESS LEVEL VIOLATION ERROR",
- [VEC_RESV59] = "UNASSIGNED RESERVED 59",
- [VEC_UNIMPEA] = "UNASSIGNED RESERVED 60",
- [VEC_UNIMPII] = "UNASSIGNED RESERVED 61",
- [VEC_RESV62] = "UNASSIGNED RESERVED 62",
- [VEC_RESV63] = "UNASSIGNED RESERVED 63",
-};
-
-static const char *space_names[] = {
- [0] = "Space 0",
- [USER_DATA] = "User Data",
- [USER_PROGRAM] = "User Program",
-#ifndef CONFIG_SUN3
- [3] = "Space 3",
+#ifdef CONFIG_MMU
+#include "traps_mm.c"
#else
- [FC_CONTROL] = "Control",
-#endif
- [4] = "Space 4",
- [SUPER_DATA] = "Super Data",
- [SUPER_PROGRAM] = "Super Program",
- [CPU_SPACE] = "CPU"
-};
-
-void die_if_kernel(char *,struct pt_regs *,int);
-asmlinkage int do_page_fault(struct pt_regs *regs, unsigned long address,
- unsigned long error_code);
-int send_fault_sig(struct pt_regs *regs);
-
-asmlinkage void trap_c(struct frame *fp);
-
-#if defined (CONFIG_M68060)
-static inline void access_error060 (struct frame *fp)
-{
- unsigned long fslw = fp->un.fmt4.pc; /* is really FSLW for access error */
-
-#ifdef DEBUG
- printk("fslw=%#lx, fa=%#lx\n", fslw, fp->un.fmt4.effaddr);
-#endif
-
- if (fslw & MMU060_BPE) {
- /* branch prediction error -> clear branch cache */
- __asm__ __volatile__ ("movec %/cacr,%/d0\n\t"
- "orl #0x00400000,%/d0\n\t"
- "movec %/d0,%/cacr"
- : : : "d0" );
- /* return if there's no other error */
- if (!(fslw & MMU060_ERR_BITS) && !(fslw & MMU060_SEE))
- return;
- }
-
- if (fslw & (MMU060_DESC_ERR | MMU060_WP | MMU060_SP)) {
- unsigned long errorcode;
- unsigned long addr = fp->un.fmt4.effaddr;
-
- if (fslw & MMU060_MA)
- addr = (addr + PAGE_SIZE - 1) & PAGE_MASK;
-
- errorcode = 1;
- if (fslw & MMU060_DESC_ERR) {
- __flush_tlb040_one(addr);
- errorcode = 0;
- }
- if (fslw & MMU060_W)
- errorcode |= 2;
-#ifdef DEBUG
- printk("errorcode = %d\n", errorcode );
-#endif
- do_page_fault(&fp->ptregs, addr, errorcode);
- } else if (fslw & (MMU060_SEE)){
- /* Software Emulation Error.
- * fault during mem_read/mem_write in ifpsp060/os.S
- */
- send_fault_sig(&fp->ptregs);
- } else if (!(fslw & (MMU060_RE|MMU060_WE)) ||
- send_fault_sig(&fp->ptregs) > 0) {
- printk("pc=%#lx, fa=%#lx\n", fp->ptregs.pc, fp->un.fmt4.effaddr);
- printk( "68060 access error, fslw=%lx\n", fslw );
- trap_c( fp );
- }
-}
-#endif /* CONFIG_M68060 */
-
-#if defined (CONFIG_M68040)
-static inline unsigned long probe040(int iswrite, unsigned long addr, int wbs)
-{
- unsigned long mmusr;
- mm_segment_t old_fs = get_fs();
-
- set_fs(MAKE_MM_SEG(wbs));
-
- if (iswrite)
- asm volatile (".chip 68040; ptestw (%0); .chip 68k" : : "a" (addr));
- else
- asm volatile (".chip 68040; ptestr (%0); .chip 68k" : : "a" (addr));
-
- asm volatile (".chip 68040; movec %%mmusr,%0; .chip 68k" : "=r" (mmusr));
-
- set_fs(old_fs);
-
- return mmusr;
-}
-
-static inline int do_040writeback1(unsigned short wbs, unsigned long wba,
- unsigned long wbd)
-{
- int res = 0;
- mm_segment_t old_fs = get_fs();
-
- /* set_fs can not be moved, otherwise put_user() may oops */
- set_fs(MAKE_MM_SEG(wbs));
-
- switch (wbs & WBSIZ_040) {
- case BA_SIZE_BYTE:
- res = put_user(wbd & 0xff, (char __user *)wba);
- break;
- case BA_SIZE_WORD:
- res = put_user(wbd & 0xffff, (short __user *)wba);
- break;
- case BA_SIZE_LONG:
- res = put_user(wbd, (int __user *)wba);
- break;
- }
-
- /* set_fs can not be moved, otherwise put_user() may oops */
- set_fs(old_fs);
-
-
-#ifdef DEBUG
- printk("do_040writeback1, res=%d\n",res);
-#endif
-
- return res;
-}
-
-/* after an exception in a writeback the stack frame corresponding
- * to that exception is discarded, set a few bits in the old frame
- * to simulate what it should look like
- */
-static inline void fix_xframe040(struct frame *fp, unsigned long wba, unsigned short wbs)
-{
- fp->un.fmt7.faddr = wba;
- fp->un.fmt7.ssw = wbs & 0xff;
- if (wba != current->thread.faddr)
- fp->un.fmt7.ssw |= MA_040;
-}
-
-static inline void do_040writebacks(struct frame *fp)
-{
- int res = 0;
-#if 0
- if (fp->un.fmt7.wb1s & WBV_040)
- printk("access_error040: cannot handle 1st writeback. oops.\n");
-#endif
-
- if ((fp->un.fmt7.wb2s & WBV_040) &&
- !(fp->un.fmt7.wb2s & WBTT_040)) {
- res = do_040writeback1(fp->un.fmt7.wb2s, fp->un.fmt7.wb2a,
- fp->un.fmt7.wb2d);
- if (res)
- fix_xframe040(fp, fp->un.fmt7.wb2a, fp->un.fmt7.wb2s);
- else
- fp->un.fmt7.wb2s = 0;
- }
-
- /* do the 2nd wb only if the first one was successful (except for a kernel wb) */
- if (fp->un.fmt7.wb3s & WBV_040 && (!res || fp->un.fmt7.wb3s & 4)) {
- res = do_040writeback1(fp->un.fmt7.wb3s, fp->un.fmt7.wb3a,
- fp->un.fmt7.wb3d);
- if (res)
- {
- fix_xframe040(fp, fp->un.fmt7.wb3a, fp->un.fmt7.wb3s);
-
- fp->un.fmt7.wb2s = fp->un.fmt7.wb3s;
- fp->un.fmt7.wb3s &= (~WBV_040);
- fp->un.fmt7.wb2a = fp->un.fmt7.wb3a;
- fp->un.fmt7.wb2d = fp->un.fmt7.wb3d;
- }
- else
- fp->un.fmt7.wb3s = 0;
- }
-
- if (res)
- send_fault_sig(&fp->ptregs);
-}
-
-/*
- * called from sigreturn(), must ensure userspace code didn't
- * manipulate exception frame to circumvent protection, then complete
- * pending writebacks
- * we just clear TM2 to turn it into a userspace access
- */
-asmlinkage void berr_040cleanup(struct frame *fp)
-{
- fp->un.fmt7.wb2s &= ~4;
- fp->un.fmt7.wb3s &= ~4;
-
- do_040writebacks(fp);
-}
-
-static inline void access_error040(struct frame *fp)
-{
- unsigned short ssw = fp->un.fmt7.ssw;
- unsigned long mmusr;
-
-#ifdef DEBUG
- printk("ssw=%#x, fa=%#lx\n", ssw, fp->un.fmt7.faddr);
- printk("wb1s=%#x, wb2s=%#x, wb3s=%#x\n", fp->un.fmt7.wb1s,
- fp->un.fmt7.wb2s, fp->un.fmt7.wb3s);
- printk ("wb2a=%lx, wb3a=%lx, wb2d=%lx, wb3d=%lx\n",
- fp->un.fmt7.wb2a, fp->un.fmt7.wb3a,
- fp->un.fmt7.wb2d, fp->un.fmt7.wb3d);
-#endif
-
- if (ssw & ATC_040) {
- unsigned long addr = fp->un.fmt7.faddr;
- unsigned long errorcode;
-
- /*
- * The MMU status has to be determined AFTER the address
- * has been corrected if there was a misaligned access (MA).
- */
- if (ssw & MA_040)
- addr = (addr + 7) & -8;
-
- /* MMU error, get the MMUSR info for this access */
- mmusr = probe040(!(ssw & RW_040), addr, ssw);
-#ifdef DEBUG
- printk("mmusr = %lx\n", mmusr);
-#endif
- errorcode = 1;
- if (!(mmusr & MMU_R_040)) {
- /* clear the invalid atc entry */
- __flush_tlb040_one(addr);
- errorcode = 0;
- }
-
- /* despite what documentation seems to say, RMW
- * accesses have always both the LK and RW bits set */
- if (!(ssw & RW_040) || (ssw & LK_040))
- errorcode |= 2;
-
- if (do_page_fault(&fp->ptregs, addr, errorcode)) {
-#ifdef DEBUG
- printk("do_page_fault() !=0\n");
-#endif
- if (user_mode(&fp->ptregs)){
- /* delay writebacks after signal delivery */
-#ifdef DEBUG
- printk(".. was usermode - return\n");
-#endif
- return;
- }
- /* disable writeback into user space from kernel
- * (if do_page_fault didn't fix the mapping,
- * the writeback won't do good)
- */
-disable_wb:
-#ifdef DEBUG
- printk(".. disabling wb2\n");
-#endif
- if (fp->un.fmt7.wb2a == fp->un.fmt7.faddr)
- fp->un.fmt7.wb2s &= ~WBV_040;
- if (fp->un.fmt7.wb3a == fp->un.fmt7.faddr)
- fp->un.fmt7.wb3s &= ~WBV_040;
- }
- } else {
- /* In case of a bus error we either kill the process or expect
- * the kernel to catch the fault, which then is also responsible
- * for cleaning up the mess.
- */
- current->thread.signo = SIGBUS;
- current->thread.faddr = fp->un.fmt7.faddr;
- if (send_fault_sig(&fp->ptregs) >= 0)
- printk("68040 bus error (ssw=%x, faddr=%lx)\n", ssw,
- fp->un.fmt7.faddr);
- goto disable_wb;
- }
-
- do_040writebacks(fp);
-}
-#endif /* CONFIG_M68040 */
-
-#if defined(CONFIG_SUN3)
-#include <asm/sun3mmu.h>
-
-extern int mmu_emu_handle_fault (unsigned long, int, int);
-
-/* sun3 version of bus_error030 */
-
-static inline void bus_error030 (struct frame *fp)
-{
- unsigned char buserr_type = sun3_get_buserr ();
- unsigned long addr, errorcode;
- unsigned short ssw = fp->un.fmtb.ssw;
- extern unsigned long _sun3_map_test_start, _sun3_map_test_end;
-
-#ifdef DEBUG
- if (ssw & (FC | FB))
- printk ("Instruction fault at %#010lx\n",
- ssw & FC ?
- fp->ptregs.format == 0xa ? fp->ptregs.pc + 2 : fp->un.fmtb.baddr - 2
- :
- fp->ptregs.format == 0xa ? fp->ptregs.pc + 4 : fp->un.fmtb.baddr);
- if (ssw & DF)
- printk ("Data %s fault at %#010lx in %s (pc=%#lx)\n",
- ssw & RW ? "read" : "write",
- fp->un.fmtb.daddr,
- space_names[ssw & DFC], fp->ptregs.pc);
-#endif
-
- /*
- * Check if this page should be demand-mapped. This needs to go before
- * the testing for a bad kernel-space access (demand-mapping applies
- * to kernel accesses too).
- */
-
- if ((ssw & DF)
- && (buserr_type & (SUN3_BUSERR_PROTERR | SUN3_BUSERR_INVALID))) {
- if (mmu_emu_handle_fault (fp->un.fmtb.daddr, ssw & RW, 0))
- return;
- }
-
- /* Check for kernel-space pagefault (BAD). */
- if (fp->ptregs.sr & PS_S) {
- /* kernel fault must be a data fault to user space */
- if (! ((ssw & DF) && ((ssw & DFC) == USER_DATA))) {
- // try checking the kernel mappings before surrender
- if (mmu_emu_handle_fault (fp->un.fmtb.daddr, ssw & RW, 1))
- return;
- /* instruction fault or kernel data fault! */
- if (ssw & (FC | FB))
- printk ("Instruction fault at %#010lx\n",
- fp->ptregs.pc);
- if (ssw & DF) {
- /* was this fault incurred testing bus mappings? */
- if((fp->ptregs.pc >= (unsigned long)&_sun3_map_test_start) &&
- (fp->ptregs.pc <= (unsigned long)&_sun3_map_test_end)) {
- send_fault_sig(&fp->ptregs);
- return;
- }
-
- printk ("Data %s fault at %#010lx in %s (pc=%#lx)\n",
- ssw & RW ? "read" : "write",
- fp->un.fmtb.daddr,
- space_names[ssw & DFC], fp->ptregs.pc);
- }
- printk ("BAD KERNEL BUSERR\n");
-
- die_if_kernel("Oops", &fp->ptregs,0);
- force_sig(SIGKILL, current);
- return;
- }
- } else {
- /* user fault */
- if (!(ssw & (FC | FB)) && !(ssw & DF))
- /* not an instruction fault or data fault! BAD */
- panic ("USER BUSERR w/o instruction or data fault");
- }
-
-
- /* First handle the data fault, if any. */
- if (ssw & DF) {
- addr = fp->un.fmtb.daddr;
-
-// errorcode bit 0: 0 -> no page 1 -> protection fault
-// errorcode bit 1: 0 -> read fault 1 -> write fault
-
-// (buserr_type & SUN3_BUSERR_PROTERR) -> protection fault
-// (buserr_type & SUN3_BUSERR_INVALID) -> invalid page fault
-
- if (buserr_type & SUN3_BUSERR_PROTERR)
- errorcode = 0x01;
- else if (buserr_type & SUN3_BUSERR_INVALID)
- errorcode = 0x00;
- else {
-#ifdef DEBUG
- printk ("*** unexpected busfault type=%#04x\n", buserr_type);
- printk ("invalid %s access at %#lx from pc %#lx\n",
- !(ssw & RW) ? "write" : "read", addr,
- fp->ptregs.pc);
-#endif
- die_if_kernel ("Oops", &fp->ptregs, buserr_type);
- force_sig (SIGBUS, current);
- return;
- }
-
-//todo: wtf is RM bit? --m
- if (!(ssw & RW) || ssw & RM)
- errorcode |= 0x02;
-
- /* Handle page fault. */
- do_page_fault (&fp->ptregs, addr, errorcode);
-
- /* Retry the data fault now. */
- return;
- }
-
- /* Now handle the instruction fault. */
-
- /* Get the fault address. */
- if (fp->ptregs.format == 0xA)
- addr = fp->ptregs.pc + 4;
- else
- addr = fp->un.fmtb.baddr;
- if (ssw & FC)
- addr -= 2;
-
- if (buserr_type & SUN3_BUSERR_INVALID) {
- if (!mmu_emu_handle_fault (fp->un.fmtb.daddr, 1, 0))
- do_page_fault (&fp->ptregs, addr, 0);
- } else {
-#ifdef DEBUG
- printk ("protection fault on insn access (segv).\n");
-#endif
- force_sig (SIGSEGV, current);
- }
-}
-#else
-#if defined(CPU_M68020_OR_M68030)
-static inline void bus_error030 (struct frame *fp)
-{
- volatile unsigned short temp;
- unsigned short mmusr;
- unsigned long addr, errorcode;
- unsigned short ssw = fp->un.fmtb.ssw;
-#ifdef DEBUG
- unsigned long desc;
-
- printk ("pid = %x ", current->pid);
- printk ("SSW=%#06x ", ssw);
-
- if (ssw & (FC | FB))
- printk ("Instruction fault at %#010lx\n",
- ssw & FC ?
- fp->ptregs.format == 0xa ? fp->ptregs.pc + 2 : fp->un.fmtb.baddr - 2
- :
- fp->ptregs.format == 0xa ? fp->ptregs.pc + 4 : fp->un.fmtb.baddr);
- if (ssw & DF)
- printk ("Data %s fault at %#010lx in %s (pc=%#lx)\n",
- ssw & RW ? "read" : "write",
- fp->un.fmtb.daddr,
- space_names[ssw & DFC], fp->ptregs.pc);
-#endif
-
- /* ++andreas: If a data fault and an instruction fault happen
- at the same time map in both pages. */
-
- /* First handle the data fault, if any. */
- if (ssw & DF) {
- addr = fp->un.fmtb.daddr;
-
-#ifdef DEBUG
- asm volatile ("ptestr %3,%2@,#7,%0\n\t"
- "pmove %%psr,%1@"
- : "=a&" (desc)
- : "a" (&temp), "a" (addr), "d" (ssw));
-#else
- asm volatile ("ptestr %2,%1@,#7\n\t"
- "pmove %%psr,%0@"
- : : "a" (&temp), "a" (addr), "d" (ssw));
-#endif
- mmusr = temp;
-
-#ifdef DEBUG
- printk("mmusr is %#x for addr %#lx in task %p\n",
- mmusr, addr, current);
- printk("descriptor address is %#lx, contents %#lx\n",
- __va(desc), *(unsigned long *)__va(desc));
-#endif
-
- errorcode = (mmusr & MMU_I) ? 0 : 1;
- if (!(ssw & RW) || (ssw & RM))
- errorcode |= 2;
-
- if (mmusr & (MMU_I | MMU_WP)) {
- if (ssw & 4) {
- printk("Data %s fault at %#010lx in %s (pc=%#lx)\n",
- ssw & RW ? "read" : "write",
- fp->un.fmtb.daddr,
- space_names[ssw & DFC], fp->ptregs.pc);
- goto buserr;
- }
- /* Don't try to do anything further if an exception was
- handled. */
- if (do_page_fault (&fp->ptregs, addr, errorcode) < 0)
- return;
- } else if (!(mmusr & MMU_I)) {
- /* probably a 020 cas fault */
- if (!(ssw & RM) && send_fault_sig(&fp->ptregs) > 0)
- printk("unexpected bus error (%#x,%#x)\n", ssw, mmusr);
- } else if (mmusr & (MMU_B|MMU_L|MMU_S)) {
- printk("invalid %s access at %#lx from pc %#lx\n",
- !(ssw & RW) ? "write" : "read", addr,
- fp->ptregs.pc);
- die_if_kernel("Oops",&fp->ptregs,mmusr);
- force_sig(SIGSEGV, current);
- return;
- } else {
-#if 0
- static volatile long tlong;
-#endif
-
- printk("weird %s access at %#lx from pc %#lx (ssw is %#x)\n",
- !(ssw & RW) ? "write" : "read", addr,
- fp->ptregs.pc, ssw);
- asm volatile ("ptestr #1,%1@,#0\n\t"
- "pmove %%psr,%0@"
- : /* no outputs */
- : "a" (&temp), "a" (addr));
- mmusr = temp;
-
- printk ("level 0 mmusr is %#x\n", mmusr);
-#if 0
- asm volatile ("pmove %%tt0,%0@"
- : /* no outputs */
- : "a" (&tlong));
- printk("tt0 is %#lx, ", tlong);
- asm volatile ("pmove %%tt1,%0@"
- : /* no outputs */
- : "a" (&tlong));
- printk("tt1 is %#lx\n", tlong);
-#endif
-#ifdef DEBUG
- printk("Unknown SIGSEGV - 1\n");
-#endif
- die_if_kernel("Oops",&fp->ptregs,mmusr);
- force_sig(SIGSEGV, current);
- return;
- }
-
- /* setup an ATC entry for the access about to be retried */
- if (!(ssw & RW) || (ssw & RM))
- asm volatile ("ploadw %1,%0@" : /* no outputs */
- : "a" (addr), "d" (ssw));
- else
- asm volatile ("ploadr %1,%0@" : /* no outputs */
- : "a" (addr), "d" (ssw));
- }
-
- /* Now handle the instruction fault. */
-
- if (!(ssw & (FC|FB)))
- return;
-
- if (fp->ptregs.sr & PS_S) {
- printk("Instruction fault at %#010lx\n",
- fp->ptregs.pc);
- buserr:
- printk ("BAD KERNEL BUSERR\n");
- die_if_kernel("Oops",&fp->ptregs,0);
- force_sig(SIGKILL, current);
- return;
- }
-
- /* get the fault address */
- if (fp->ptregs.format == 10)
- addr = fp->ptregs.pc + 4;
- else
- addr = fp->un.fmtb.baddr;
- if (ssw & FC)
- addr -= 2;
-
- if ((ssw & DF) && ((addr ^ fp->un.fmtb.daddr) & PAGE_MASK) == 0)
- /* Insn fault on same page as data fault. But we
- should still create the ATC entry. */
- goto create_atc_entry;
-
-#ifdef DEBUG
- asm volatile ("ptestr #1,%2@,#7,%0\n\t"
- "pmove %%psr,%1@"
- : "=a&" (desc)
- : "a" (&temp), "a" (addr));
-#else
- asm volatile ("ptestr #1,%1@,#7\n\t"
- "pmove %%psr,%0@"
- : : "a" (&temp), "a" (addr));
-#endif
- mmusr = temp;
-
-#ifdef DEBUG
- printk ("mmusr is %#x for addr %#lx in task %p\n",
- mmusr, addr, current);
- printk ("descriptor address is %#lx, contents %#lx\n",
- __va(desc), *(unsigned long *)__va(desc));
-#endif
-
- if (mmusr & MMU_I)
- do_page_fault (&fp->ptregs, addr, 0);
- else if (mmusr & (MMU_B|MMU_L|MMU_S)) {
- printk ("invalid insn access at %#lx from pc %#lx\n",
- addr, fp->ptregs.pc);
-#ifdef DEBUG
- printk("Unknown SIGSEGV - 2\n");
-#endif
- die_if_kernel("Oops",&fp->ptregs,mmusr);
- force_sig(SIGSEGV, current);
- return;
- }
-
-create_atc_entry:
- /* setup an ATC entry for the access about to be retried */
- asm volatile ("ploadr #2,%0@" : /* no outputs */
- : "a" (addr));
-}
-#endif /* CPU_M68020_OR_M68030 */
-#endif /* !CONFIG_SUN3 */
-
-asmlinkage void buserr_c(struct frame *fp)
-{
- /* Only set esp0 if coming from user mode */
- if (user_mode(&fp->ptregs))
- current->thread.esp0 = (unsigned long) fp;
-
-#ifdef DEBUG
- printk ("*** Bus Error *** Format is %x\n", fp->ptregs.format);
-#endif
-
- switch (fp->ptregs.format) {
-#if defined (CONFIG_M68060)
- case 4: /* 68060 access error */
- access_error060 (fp);
- break;
-#endif
-#if defined (CONFIG_M68040)
- case 0x7: /* 68040 access error */
- access_error040 (fp);
- break;
-#endif
-#if defined (CPU_M68020_OR_M68030)
- case 0xa:
- case 0xb:
- bus_error030 (fp);
- break;
-#endif
- default:
- die_if_kernel("bad frame format",&fp->ptregs,0);
-#ifdef DEBUG
- printk("Unknown SIGSEGV - 4\n");
-#endif
- force_sig(SIGSEGV, current);
- }
-}
-
-
-static int kstack_depth_to_print = 48;
-
-void show_trace(unsigned long *stack)
-{
- unsigned long *endstack;
- unsigned long addr;
- int i;
-
- printk("Call Trace:");
- addr = (unsigned long)stack + THREAD_SIZE - 1;
- endstack = (unsigned long *)(addr & -THREAD_SIZE);
- i = 0;
- while (stack + 1 <= endstack) {
- addr = *stack++;
- /*
- * If the address is either in the text segment of the
- * kernel, or in the region which contains vmalloc'ed
- * memory, it *may* be the address of a calling
- * routine; if so, print it so that someone tracing
- * down the cause of the crash will be able to figure
- * out the call path that was taken.
- */
- if (__kernel_text_address(addr)) {
-#ifndef CONFIG_KALLSYMS
- if (i % 5 == 0)
- printk("\n ");
-#endif
- printk(" [<%08lx>] %pS\n", addr, (void *)addr);
- i++;
- }
- }
- printk("\n");
-}
-
-void show_registers(struct pt_regs *regs)
-{
- struct frame *fp = (struct frame *)regs;
- mm_segment_t old_fs = get_fs();
- u16 c, *cp;
- unsigned long addr;
- int i;
-
- print_modules();
- printk("PC: [<%08lx>] %pS\n", regs->pc, (void *)regs->pc);
- printk("SR: %04x SP: %p a2: %08lx\n", regs->sr, regs, regs->a2);
- printk("d0: %08lx d1: %08lx d2: %08lx d3: %08lx\n",
- regs->d0, regs->d1, regs->d2, regs->d3);
- printk("d4: %08lx d5: %08lx a0: %08lx a1: %08lx\n",
- regs->d4, regs->d5, regs->a0, regs->a1);
-
- printk("Process %s (pid: %d, task=%p)\n",
- current->comm, task_pid_nr(current), current);
- addr = (unsigned long)&fp->un;
- printk("Frame format=%X ", regs->format);
- switch (regs->format) {
- case 0x2:
- printk("instr addr=%08lx\n", fp->un.fmt2.iaddr);
- addr += sizeof(fp->un.fmt2);
- break;
- case 0x3:
- printk("eff addr=%08lx\n", fp->un.fmt3.effaddr);
- addr += sizeof(fp->un.fmt3);
- break;
- case 0x4:
- printk((CPU_IS_060 ? "fault addr=%08lx fslw=%08lx\n"
- : "eff addr=%08lx pc=%08lx\n"),
- fp->un.fmt4.effaddr, fp->un.fmt4.pc);
- addr += sizeof(fp->un.fmt4);
- break;
- case 0x7:
- printk("eff addr=%08lx ssw=%04x faddr=%08lx\n",
- fp->un.fmt7.effaddr, fp->un.fmt7.ssw, fp->un.fmt7.faddr);
- printk("wb 1 stat/addr/data: %04x %08lx %08lx\n",
- fp->un.fmt7.wb1s, fp->un.fmt7.wb1a, fp->un.fmt7.wb1dpd0);
- printk("wb 2 stat/addr/data: %04x %08lx %08lx\n",
- fp->un.fmt7.wb2s, fp->un.fmt7.wb2a, fp->un.fmt7.wb2d);
- printk("wb 3 stat/addr/data: %04x %08lx %08lx\n",
- fp->un.fmt7.wb3s, fp->un.fmt7.wb3a, fp->un.fmt7.wb3d);
- printk("push data: %08lx %08lx %08lx %08lx\n",
- fp->un.fmt7.wb1dpd0, fp->un.fmt7.pd1, fp->un.fmt7.pd2,
- fp->un.fmt7.pd3);
- addr += sizeof(fp->un.fmt7);
- break;
- case 0x9:
- printk("instr addr=%08lx\n", fp->un.fmt9.iaddr);
- addr += sizeof(fp->un.fmt9);
- break;
- case 0xa:
- printk("ssw=%04x isc=%04x isb=%04x daddr=%08lx dobuf=%08lx\n",
- fp->un.fmta.ssw, fp->un.fmta.isc, fp->un.fmta.isb,
- fp->un.fmta.daddr, fp->un.fmta.dobuf);
- addr += sizeof(fp->un.fmta);
- break;
- case 0xb:
- printk("ssw=%04x isc=%04x isb=%04x daddr=%08lx dobuf=%08lx\n",
- fp->un.fmtb.ssw, fp->un.fmtb.isc, fp->un.fmtb.isb,
- fp->un.fmtb.daddr, fp->un.fmtb.dobuf);
- printk("baddr=%08lx dibuf=%08lx ver=%x\n",
- fp->un.fmtb.baddr, fp->un.fmtb.dibuf, fp->un.fmtb.ver);
- addr += sizeof(fp->un.fmtb);
- break;
- default:
- printk("\n");
- }
- show_stack(NULL, (unsigned long *)addr);
-
- printk("Code:");
- set_fs(KERNEL_DS);
- cp = (u16 *)regs->pc;
- for (i = -8; i < 16; i++) {
- if (get_user(c, cp + i) && i >= 0) {
- printk(" Bad PC value.");
- break;
- }
- printk(i ? " %04x" : " <%04x>", c);
- }
- set_fs(old_fs);
- printk ("\n");
-}
-
-void show_stack(struct task_struct *task, unsigned long *stack)
-{
- unsigned long *p;
- unsigned long *endstack;
- int i;
-
- if (!stack) {
- if (task)
- stack = (unsigned long *)task->thread.esp0;
- else
- stack = (unsigned long *)&stack;
- }
- endstack = (unsigned long *)(((unsigned long)stack + THREAD_SIZE - 1) & -THREAD_SIZE);
-
- printk("Stack from %08lx:", (unsigned long)stack);
- p = stack;
- for (i = 0; i < kstack_depth_to_print; i++) {
- if (p + 1 > endstack)
- break;
- if (i % 8 == 0)
- printk("\n ");
- printk(" %08lx", *p++);
- }
- printk("\n");
- show_trace(stack);
-}
-
-/*
- * The architecture-independent backtrace generator
- */
-void dump_stack(void)
-{
- unsigned long stack;
-
- show_trace(&stack);
-}
-
-EXPORT_SYMBOL(dump_stack);
-
-void bad_super_trap (struct frame *fp)
-{
- console_verbose();
- if (fp->ptregs.vector < 4 * ARRAY_SIZE(vec_names))
- printk ("*** %s *** FORMAT=%X\n",
- vec_names[(fp->ptregs.vector) >> 2],
- fp->ptregs.format);
- else
- printk ("*** Exception %d *** FORMAT=%X\n",
- (fp->ptregs.vector) >> 2,
- fp->ptregs.format);
- if (fp->ptregs.vector >> 2 == VEC_ADDRERR && CPU_IS_020_OR_030) {
- unsigned short ssw = fp->un.fmtb.ssw;
-
- printk ("SSW=%#06x ", ssw);
-
- if (ssw & RC)
- printk ("Pipe stage C instruction fault at %#010lx\n",
- (fp->ptregs.format) == 0xA ?
- fp->ptregs.pc + 2 : fp->un.fmtb.baddr - 2);
- if (ssw & RB)
- printk ("Pipe stage B instruction fault at %#010lx\n",
- (fp->ptregs.format) == 0xA ?
- fp->ptregs.pc + 4 : fp->un.fmtb.baddr);
- if (ssw & DF)
- printk ("Data %s fault at %#010lx in %s (pc=%#lx)\n",
- ssw & RW ? "read" : "write",
- fp->un.fmtb.daddr, space_names[ssw & DFC],
- fp->ptregs.pc);
- }
- printk ("Current process id is %d\n", task_pid_nr(current));
- die_if_kernel("BAD KERNEL TRAP", &fp->ptregs, 0);
-}
-
-asmlinkage void trap_c(struct frame *fp)
-{
- int sig;
- siginfo_t info;
-
- if (fp->ptregs.sr & PS_S) {
- if (fp->ptregs.vector == VEC_TRACE << 2) {
- /* traced a trapping instruction on a 68020/30,
- * real exception will be executed afterwards.
- */
- } else if (!handle_kernel_fault(&fp->ptregs))
- bad_super_trap(fp);
- return;
- }
-
- /* send the appropriate signal to the user program */
- switch ((fp->ptregs.vector) >> 2) {
- case VEC_ADDRERR:
- info.si_code = BUS_ADRALN;
- sig = SIGBUS;
- break;
- case VEC_ILLEGAL:
- case VEC_LINE10:
- case VEC_LINE11:
- info.si_code = ILL_ILLOPC;
- sig = SIGILL;
- break;
- case VEC_PRIV:
- info.si_code = ILL_PRVOPC;
- sig = SIGILL;
- break;
- case VEC_COPROC:
- info.si_code = ILL_COPROC;
- sig = SIGILL;
- break;
- case VEC_TRAP1:
- case VEC_TRAP2:
- case VEC_TRAP3:
- case VEC_TRAP4:
- case VEC_TRAP5:
- case VEC_TRAP6:
- case VEC_TRAP7:
- case VEC_TRAP8:
- case VEC_TRAP9:
- case VEC_TRAP10:
- case VEC_TRAP11:
- case VEC_TRAP12:
- case VEC_TRAP13:
- case VEC_TRAP14:
- info.si_code = ILL_ILLTRP;
- sig = SIGILL;
- break;
- case VEC_FPBRUC:
- case VEC_FPOE:
- case VEC_FPNAN:
- info.si_code = FPE_FLTINV;
- sig = SIGFPE;
- break;
- case VEC_FPIR:
- info.si_code = FPE_FLTRES;
- sig = SIGFPE;
- break;
- case VEC_FPDIVZ:
- info.si_code = FPE_FLTDIV;
- sig = SIGFPE;
- break;
- case VEC_FPUNDER:
- info.si_code = FPE_FLTUND;
- sig = SIGFPE;
- break;
- case VEC_FPOVER:
- info.si_code = FPE_FLTOVF;
- sig = SIGFPE;
- break;
- case VEC_ZERODIV:
- info.si_code = FPE_INTDIV;
- sig = SIGFPE;
- break;
- case VEC_CHK:
- case VEC_TRAP:
- info.si_code = FPE_INTOVF;
- sig = SIGFPE;
- break;
- case VEC_TRACE: /* ptrace single step */
- info.si_code = TRAP_TRACE;
- sig = SIGTRAP;
- break;
- case VEC_TRAP15: /* breakpoint */
- info.si_code = TRAP_BRKPT;
- sig = SIGTRAP;
- break;
- default:
- info.si_code = ILL_ILLOPC;
- sig = SIGILL;
- break;
- }
- info.si_signo = sig;
- info.si_errno = 0;
- switch (fp->ptregs.format) {
- default:
- info.si_addr = (void *) fp->ptregs.pc;
- break;
- case 2:
- info.si_addr = (void *) fp->un.fmt2.iaddr;
- break;
- case 7:
- info.si_addr = (void *) fp->un.fmt7.effaddr;
- break;
- case 9:
- info.si_addr = (void *) fp->un.fmt9.iaddr;
- break;
- case 10:
- info.si_addr = (void *) fp->un.fmta.daddr;
- break;
- case 11:
- info.si_addr = (void *) fp->un.fmtb.daddr;
- break;
- }
- force_sig_info (sig, &info, current);
-}
-
-void die_if_kernel (char *str, struct pt_regs *fp, int nr)
-{
- if (!(fp->sr & PS_S))
- return;
-
- console_verbose();
- printk("%s: %08x\n",str,nr);
- show_registers(fp);
- add_taint(TAINT_DIE);
- do_exit(SIGSEGV);
-}
-
-/*
- * This function is called if an error occur while accessing
- * user-space from the fpsp040 code.
- */
-asmlinkage void fpsp040_die(void)
-{
- do_exit(SIGSEGV);
-}
-
-#ifdef CONFIG_M68KFPU_EMU
-asmlinkage void fpemu_signal(int signal, int code, void *addr)
-{
- siginfo_t info;
-
- info.si_signo = signal;
- info.si_errno = 0;
- info.si_code = code;
- info.si_addr = addr;
- force_sig_info(signal, &info, current);
-}
+#include "traps_no.c"
#endif
git.openpandora.org / pandora-kernel.git / blobdiff