diff options
Diffstat (limited to 'arch/h8300/kernel/ptrace_h.c')
| -rw-r--r-- | arch/h8300/kernel/ptrace_h.c | 256 |
1 files changed, 0 insertions, 256 deletions
diff --git a/arch/h8300/kernel/ptrace_h.c b/arch/h8300/kernel/ptrace_h.c deleted file mode 100644 index 15db45a03b04..000000000000 --- a/arch/h8300/kernel/ptrace_h.c +++ /dev/null @@ -1,256 +0,0 @@ -/* - * ptrace cpu depend helper functions - * - * Copyright 2003, 2015 Yoshinori Sato <ysato@users.sourceforge.jp> - * - * 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. - */ - -#include <linux/linkage.h> -#include <linux/sched/signal.h> -#include <asm/ptrace.h> - -#define BREAKINST 0x5730 /* trapa #3 */ - -/* disable singlestep */ -void user_disable_single_step(struct task_struct *child) -{ - if ((long)child->thread.breakinfo.addr != -1L) { - *(child->thread.breakinfo.addr) = child->thread.breakinfo.inst; - child->thread.breakinfo.addr = (unsigned short *)-1L; - } -} - -/* calculate next pc */ -enum jump_type {none, /* normal instruction */ - jabs, /* absolute address jump */ - ind, /* indirect address jump */ - ret, /* return to subrutine */ - reg, /* register indexed jump */ - relb, /* pc relative jump (byte offset) */ - relw, /* pc relative jump (word offset) */ - }; - -/* opcode decode table define - ptn: opcode pattern - msk: opcode bitmask - len: instruction length (<0 next table index) - jmp: jump operation mode */ -struct optable { - unsigned char bitpattern; - unsigned char bitmask; - signed char length; - signed char type; -} __packed __aligned(1); - -#define OPTABLE(ptn, msk, len, jmp) \ - { \ - .bitpattern = ptn, \ - .bitmask = msk, \ - .length = len, \ - .type = jmp, \ - } - -static const struct optable optable_0[] = { - OPTABLE(0x00, 0xff, 1, none), /* 0x00 */ - OPTABLE(0x01, 0xff, -1, none), /* 0x01 */ - OPTABLE(0x02, 0xfe, 1, none), /* 0x02-0x03 */ - OPTABLE(0x04, 0xee, 1, none), /* 0x04-0x05/0x14-0x15 */ - OPTABLE(0x06, 0xfe, 1, none), /* 0x06-0x07 */ - OPTABLE(0x08, 0xea, 1, none), /* 0x08-0x09/0x0c-0x0d/0x18-0x19/0x1c-0x1d */ - OPTABLE(0x0a, 0xee, 1, none), /* 0x0a-0x0b/0x1a-0x1b */ - OPTABLE(0x0e, 0xee, 1, none), /* 0x0e-0x0f/0x1e-0x1f */ - OPTABLE(0x10, 0xfc, 1, none), /* 0x10-0x13 */ - OPTABLE(0x16, 0xfe, 1, none), /* 0x16-0x17 */ - OPTABLE(0x20, 0xe0, 1, none), /* 0x20-0x3f */ - OPTABLE(0x40, 0xf0, 1, relb), /* 0x40-0x4f */ - OPTABLE(0x50, 0xfc, 1, none), /* 0x50-0x53 */ - OPTABLE(0x54, 0xfd, 1, ret), /* 0x54/0x56 */ - OPTABLE(0x55, 0xff, 1, relb), /* 0x55 */ - OPTABLE(0x57, 0xff, 1, none), /* 0x57 */ - OPTABLE(0x58, 0xfb, 2, relw), /* 0x58/0x5c */ - OPTABLE(0x59, 0xfb, 1, reg), /* 0x59/0x5b */ - OPTABLE(0x5a, 0xfb, 2, jabs), /* 0x5a/0x5e */ - OPTABLE(0x5b, 0xfb, 2, ind), /* 0x5b/0x5f */ - OPTABLE(0x60, 0xe8, 1, none), /* 0x60-0x67/0x70-0x77 */ - OPTABLE(0x68, 0xfa, 1, none), /* 0x68-0x69/0x6c-0x6d */ - OPTABLE(0x6a, 0xfe, -2, none), /* 0x6a-0x6b */ - OPTABLE(0x6e, 0xfe, 2, none), /* 0x6e-0x6f */ - OPTABLE(0x78, 0xff, 4, none), /* 0x78 */ - OPTABLE(0x79, 0xff, 2, none), /* 0x79 */ - OPTABLE(0x7a, 0xff, 3, none), /* 0x7a */ - OPTABLE(0x7b, 0xff, 2, none), /* 0x7b */ - OPTABLE(0x7c, 0xfc, 2, none), /* 0x7c-0x7f */ - OPTABLE(0x80, 0x80, 1, none), /* 0x80-0xff */ -}; - -static const struct optable optable_1[] = { - OPTABLE(0x00, 0xff, -3, none), /* 0x0100 */ - OPTABLE(0x40, 0xf0, -3, none), /* 0x0140-0x14f */ - OPTABLE(0x80, 0xf0, 1, none), /* 0x0180-0x018f */ - OPTABLE(0xc0, 0xc0, 2, none), /* 0x01c0-0x01ff */ -}; - -static const struct optable optable_2[] = { - OPTABLE(0x00, 0x20, 2, none), /* 0x6a0?/0x6a8?/0x6b0?/0x6b8? */ - OPTABLE(0x20, 0x20, 3, none), /* 0x6a2?/0x6aa?/0x6b2?/0x6ba? */ -}; - -static const struct optable optable_3[] = { - OPTABLE(0x69, 0xfb, 2, none), /* 0x010069/0x01006d/014069/0x01406d */ - OPTABLE(0x6b, 0xff, -4, none), /* 0x01006b/0x01406b */ - OPTABLE(0x6f, 0xff, 3, none), /* 0x01006f/0x01406f */ - OPTABLE(0x78, 0xff, 5, none), /* 0x010078/0x014078 */ -}; - -static const struct optable optable_4[] = { -/* 0x0100690?/0x01006d0?/0140690?/0x01406d0?/ - 0x0100698?/0x01006d8?/0140698?/0x01406d8? */ - OPTABLE(0x00, 0x78, 3, none), -/* 0x0100692?/0x01006d2?/0140692?/0x01406d2?/ - 0x010069a?/0x01006da?/014069a?/0x01406da? */ - OPTABLE(0x20, 0x78, 4, none), -}; - -static const struct optables_list { - const struct optable *ptr; - int size; -} optables[] = { -#define OPTABLES(no) \ - { \ - .ptr = optable_##no, \ - .size = sizeof(optable_##no) / sizeof(struct optable), \ - } - OPTABLES(0), - OPTABLES(1), - OPTABLES(2), - OPTABLES(3), - OPTABLES(4), - -}; - -const unsigned char condmask[] = { - 0x00, 0x40, 0x01, 0x04, 0x02, 0x08, 0x10, 0x20 -}; - -static int isbranch(struct task_struct *task, int reson) -{ - unsigned char cond = h8300_get_reg(task, PT_CCR); - - /* encode complex conditions */ - /* B4: N^V - B5: Z|(N^V) - B6: C|Z */ - __asm__("bld #3,%w0\n\t" - "bxor #1,%w0\n\t" - "bst #4,%w0\n\t" - "bor #2,%w0\n\t" - "bst #5,%w0\n\t" - "bld #2,%w0\n\t" - "bor #0,%w0\n\t" - "bst #6,%w0\n\t" - : "=&r"(cond) : "0"(cond) : "cc"); - cond &= condmask[reson >> 1]; - if (!(reson & 1)) - return cond == 0; - else - return cond != 0; -} - -static unsigned short *decode(struct task_struct *child, - const struct optable *op, - char *fetch_p, unsigned short *pc, - unsigned char inst) -{ - unsigned long addr; - unsigned long *sp; - int regno; - - switch (op->type) { - case none: - return (unsigned short *)pc + op->length; - case jabs: - addr = *(unsigned long *)pc; - return (unsigned short *)(addr & 0x00ffffff); - case ind: - addr = *pc & 0xff; - return (unsigned short *)(*(unsigned long *)addr); - case ret: - sp = (unsigned long *)h8300_get_reg(child, PT_USP); - /* user stack frames - | er0 | temporary saved - +--------+ - | exp | exception stack frames - +--------+ - | ret pc | userspace return address - */ - return (unsigned short *)(*(sp+2) & 0x00ffffff); - case reg: - regno = (*pc >> 4) & 0x07; - if (regno == 0) - addr = h8300_get_reg(child, PT_ER0); - else - addr = h8300_get_reg(child, regno-1 + PT_ER1); - return (unsigned short *)addr; - case relb: - if (inst == 0x55 || isbranch(child, inst & 0x0f)) - pc = (unsigned short *)((unsigned long)pc + - ((signed char)(*fetch_p))); - return pc+1; /* skip myself */ - case relw: - if (inst == 0x5c || isbranch(child, (*fetch_p & 0xf0) >> 4)) - pc = (unsigned short *)((unsigned long)pc + - ((signed short)(*(pc+1)))); - return pc+2; /* skip myself */ - default: - return NULL; - } -} - -static unsigned short *nextpc(struct task_struct *child, unsigned short *pc) -{ - const struct optable *op; - unsigned char *fetch_p; - int op_len; - unsigned char inst; - - op = optables[0].ptr; - op_len = optables[0].size; - fetch_p = (unsigned char *)pc; - inst = *fetch_p++; - do { - if ((inst & op->bitmask) == op->bitpattern) { - if (op->length < 0) { - op = optables[-op->length].ptr; - op_len = optables[-op->length].size + 1; - inst = *fetch_p++; - } else - return decode(child, op, fetch_p, pc, inst); - } else - op++; - } while (--op_len > 0); - return NULL; -} - -/* Set breakpoint(s) to simulate a single step from the current PC. */ - -void user_enable_single_step(struct task_struct *child) -{ - unsigned short *next; - - next = nextpc(child, (unsigned short *)h8300_get_reg(child, PT_PC)); - child->thread.breakinfo.addr = next; - child->thread.breakinfo.inst = *next; - *next = BREAKINST; -} - -asmlinkage void trace_trap(unsigned long bp) -{ - if ((unsigned long)current->thread.breakinfo.addr == bp) { - user_disable_single_step(current); - force_sig(SIGTRAP); - } else - force_sig(SIGILL); -} |