| alignment.c (a02001086bbfb4da35d1228bebc2f1b442db455f) | alignment.c (4ed89f2228061422ce5f62545fd0b6f6648bd2cc) |
|---|---|
| 1/* 2 * linux/arch/arm/mm/alignment.c 3 * 4 * Copyright (C) 1995 Linus Torvalds 5 * Modifications for ARM processor (c) 1995-2001 Russell King 6 * Thumb alignment fault fixups (c) 2004 MontaVista Software, Inc. 7 * - Adapted from gdb/sim/arm/thumbemu.c -- Thumb instruction emulation. 8 * Copyright (C) 1996, Cygnus Software Technologies Ltd. --- 99 unchanged lines hidden (view full) --- 108 * Ignoring the alignment fault is not an option on these 109 * CPUs since we spin re-faulting the instruction without 110 * making any progress. 111 */ 112 if (cpu_is_v6_unaligned() && !(new_usermode & (UM_FIXUP | UM_SIGNAL))) { 113 new_usermode |= UM_FIXUP; 114 115 if (warn) | 1/* 2 * linux/arch/arm/mm/alignment.c 3 * 4 * Copyright (C) 1995 Linus Torvalds 5 * Modifications for ARM processor (c) 1995-2001 Russell King 6 * Thumb alignment fault fixups (c) 2004 MontaVista Software, Inc. 7 * - Adapted from gdb/sim/arm/thumbemu.c -- Thumb instruction emulation. 8 * Copyright (C) 1996, Cygnus Software Technologies Ltd. --- 99 unchanged lines hidden (view full) --- 108 * Ignoring the alignment fault is not an option on these 109 * CPUs since we spin re-faulting the instruction without 110 * making any progress. 111 */ 112 if (cpu_is_v6_unaligned() && !(new_usermode & (UM_FIXUP | UM_SIGNAL))) { 113 new_usermode |= UM_FIXUP; 114 115 if (warn) |
| 116 printk(KERN_WARNING "alignment: ignoring faults is unsafe on this CPU. Defaulting to fixup mode.\n"); | 116 pr_warn("alignment: ignoring faults is unsafe on this CPU. Defaulting to fixup mode.\n"); |
| 117 } 118 119 return new_usermode; 120} 121 122#ifdef CONFIG_PROC_FS 123static const char *usermode_action[] = { 124 "ignored", --- 393 unchanged lines hidden (view full) --- 518 * [ls]dm alignment faults are noisy! 519 */ 520#if !(defined CONFIG_CPU_ARM922T) && !(defined CONFIG_CPU_ARM920T) 521 /* 522 * This is a "hint" - we already have eaddr worked out by the 523 * processor for us. 524 */ 525 if (addr != eaddr) { | 117 } 118 119 return new_usermode; 120} 121 122#ifdef CONFIG_PROC_FS 123static const char *usermode_action[] = { 124 "ignored", --- 393 unchanged lines hidden (view full) --- 518 * [ls]dm alignment faults are noisy! 519 */ 520#if !(defined CONFIG_CPU_ARM922T) && !(defined CONFIG_CPU_ARM920T) 521 /* 522 * This is a "hint" - we already have eaddr worked out by the 523 * processor for us. 524 */ 525 if (addr != eaddr) { |
| 526 printk(KERN_ERR "LDMSTM: PC = %08lx, instr = %08lx, " | 526 pr_err("LDMSTM: PC = %08lx, instr = %08lx, " |
| 527 "addr = %08lx, eaddr = %08lx\n", 528 instruction_pointer(regs), instr, addr, eaddr); 529 show_regs(regs); 530 } 531#endif 532 533 if (user_mode(regs)) { 534 for (regbits = REGMASK_BITS(instr), rd = 0; regbits; --- 27 unchanged lines hidden (view full) --- 562 regs->ARM_pc -= correction; 563 return TYPE_DONE; 564 565fault: 566 regs->ARM_pc -= correction; 567 return TYPE_FAULT; 568 569bad: | 527 "addr = %08lx, eaddr = %08lx\n", 528 instruction_pointer(regs), instr, addr, eaddr); 529 show_regs(regs); 530 } 531#endif 532 533 if (user_mode(regs)) { 534 for (regbits = REGMASK_BITS(instr), rd = 0; regbits; --- 27 unchanged lines hidden (view full) --- 562 regs->ARM_pc -= correction; 563 return TYPE_DONE; 564 565fault: 566 regs->ARM_pc -= correction; 567 return TYPE_FAULT; 568 569bad: |
| 570 printk(KERN_ERR "Alignment trap: not handling ldm with s-bit set\n"); | 570 pr_err("Alignment trap: not handling ldm with s-bit set\n"); |
| 571 return TYPE_ERROR; 572} 573 574/* 575 * Convert Thumb ld/st instruction forms to equivalent ARM instructions so 576 * we can reuse ARM userland alignment fault fixups for Thumb. 577 * 578 * This implementation was initially based on the algorithm found in --- 315 unchanged lines hidden (view full) --- 894 goto bad; 895 /* 896 * We got a fault - fix it up, or die. 897 */ 898 do_bad_area(addr, fsr, regs); 899 return 0; 900 901 swp: | 571 return TYPE_ERROR; 572} 573 574/* 575 * Convert Thumb ld/st instruction forms to equivalent ARM instructions so 576 * we can reuse ARM userland alignment fault fixups for Thumb. 577 * 578 * This implementation was initially based on the algorithm found in --- 315 unchanged lines hidden (view full) --- 894 goto bad; 895 /* 896 * We got a fault - fix it up, or die. 897 */ 898 do_bad_area(addr, fsr, regs); 899 return 0; 900 901 swp: |
| 902 printk(KERN_ERR "Alignment trap: not handling swp instruction\n"); | 902 pr_err("Alignment trap: not handling swp instruction\n"); |
| 903 904 bad: 905 /* 906 * Oops, we didn't handle the instruction. 907 */ | 903 904 bad: 905 /* 906 * Oops, we didn't handle the instruction. 907 */ |
| 908 printk(KERN_ERR "Alignment trap: not handling instruction " | 908 pr_err("Alignment trap: not handling instruction " |
| 909 "%0*lx at [<%08lx>]\n", 910 isize << 1, 911 isize == 2 ? tinstr : instr, instrptr); 912 ai_skipped += 1; 913 return 1; 914 915 user: 916 ai_user += 1; --- 92 unchanged lines hidden --- | 909 "%0*lx at [<%08lx>]\n", 910 isize << 1, 911 isize == 2 ? tinstr : instr, instrptr); 912 ai_skipped += 1; 913 return 1; 914 915 user: 916 ai_user += 1; --- 92 unchanged lines hidden --- |