| 0,0 → 1,120 |
|---|
| /* |
| * Copyright (c) 2008 Jiri Svoboda |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * - Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * - Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * - The name of the author may not be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| /** @addtogroup debug |
| * @{ |
| */ |
| /** @file |
| */ |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <sys/types.h> |
| #include <udebug.h> |
| |
| #include "../../../main.h" |
| #include "../../../include/arch.h" |
| |
| #define OPCODE_INT3 0xCC |
| |
| #define ISTATE_OFF_EIP 12 |
| #define ISTATE_OFF_EFLAGS 14 |
| |
| void arch_breakpoint_add(uintptr_t addr) |
| { |
| char brkp[1]; |
| int rc; |
| breakpoint_t *brk; |
| int i; |
| |
| brk = NULL; |
| for (i = 0; i < MAX_BRKPTS; i++) |
| if (brk_list[i].set == 0) brk = brk_list+i; |
| |
| if (!brk) { |
| printf("too many breakpoints\n"); |
| return; |
| } |
| |
| rc = udebug_mem_read(app_phone, &brk->arch.back, addr, 1); |
| printf("udebug_mem_read() -> %d\n", rc); |
| brkp[0] = OPCODE_INT3; |
| rc = udebug_mem_write(app_phone, brkp, addr, 1); |
| printf("udebug_mem_write() -> %d\n", rc); |
| |
| brk->addr = addr; |
| brk->set = 1; |
| } |
| |
| static unsigned buffer[1024]; |
| static breakpoint_t *lifted_brkpt; |
| |
| void arch_event_breakpoint(thash_t thread_hash) |
| { |
| int rc; |
| |
| rc = udebug_regs_read(app_phone, thread_hash, buffer); |
| printf("udebug_regs_read -> %d\n", rc); |
| printf("EIP was 0x%08x\n", buffer[ISTATE_OFF_EIP]); |
| int brk_addr = buffer[ISTATE_OFF_EIP] - 1; |
| int bi; |
| for (bi = 0; bi < MAX_BRKPTS; bi++) { |
| if (brk_list[bi].set && brk_list[bi].addr == brk_addr) |
| break; |
| } |
| if (bi < MAX_BRKPTS) { |
| buffer[ISTATE_OFF_EIP] = brk_addr; |
| buffer[ISTATE_OFF_EFLAGS] |= 0x0100; /* trap flag */ |
| printf("setting EIP to 0x%08x\n", buffer[ISTATE_OFF_EIP]); |
| rc = udebug_regs_write(app_phone, thread_hash, buffer); |
| rc = udebug_mem_write(app_phone, &brk_list[bi].arch.back, brk_addr, 1); |
| printf("udebug_mem_write(phone, 0x%x, 0x%02x, 1) -> %d\n", brk_addr, brk_list[bi].arch.back, rc); |
| lifted_brkpt = &brk_list[bi]; |
| } else { |
| printf("unrecognized breakpoint at 0x%x\n", brk_addr); |
| } |
| } |
| |
| void arch_event_trap(thash_t thread_hash) |
| { |
| unsigned char brkinstr[1]; |
| int rc; |
| |
| breakpoint_t *lb = lifted_brkpt; |
| brkinstr[0] = OPCODE_INT3; |
| rc = udebug_mem_write(app_phone, brkinstr, lb->addr, 1); |
| printf("restore breakpoint -> %d\n", rc); |
| |
| rc = udebug_regs_read(app_phone, thread_hash, buffer); |
| printf("udebug_regs_read -> %d\n", rc); |
| buffer[ISTATE_OFF_EFLAGS] &= ~0x0100; /* trap flag */ |
| rc = udebug_regs_write(app_phone, thread_hash, buffer); |
| } |
| |
| /** @} |
| */ |