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); |
} |
|
/** @} |
*/ |