0,0 → 1,188 |
/* |
* Copyright (c) 2009 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 <bool.h> |
#include <udebug.h> |
|
#include <kernel/arch/context_offset.h> |
|
#include "../../../cons.h" |
#include "../../../main.h" |
#include "../../../include/arch.h" |
|
#define OPCODE_INT3 0xCC |
|
void arch_dthread_initialize(dthread_t *dt) |
{ |
dt->arch.singlestep = false; |
} |
|
static int _set_trap_flag(dthread_t *dt, bool enable) |
{ |
static istate_t istate; |
int rc; |
|
rc = udebug_regs_read(app_phone, dt->hash, &istate); |
if (rc < 0) { printf("regs read failed\n"); return -1; } |
|
if (enable) istate.rflags |= 0x0100; /* trap flag */ |
else if (!active_bkpt) istate.rflags &= ~0x0100; /* trap flag */ |
|
rc = udebug_regs_write(app_phone, dt->hash, &istate); |
if (rc < 0) { printf("regs write failed\n"); return -1; } |
|
return 0; |
} |
|
int arch_breakpoint_set(breakpoint_t *b) |
{ |
char brkp[1]; |
int rc; |
|
rc = udebug_mem_read(app_phone, &b->arch.back, b->addr, 1); |
cons_printf("udebug_mem_read() -> %d\n", rc); |
if (rc < 0) return rc; |
|
brkp[0] = OPCODE_INT3; |
rc = udebug_mem_write(app_phone, brkp, b->addr, 1); |
if (rc < 0) return rc; |
|
cons_printf("udebug_mem_write() -> %d\n", rc); |
return 0; |
} |
|
int arch_breakpoint_remove(breakpoint_t *b) |
{ |
int rc; |
|
if (b->active) { |
active_bkpt = NULL; |
} else { |
rc = udebug_mem_write(app_phone, &b->arch.back, b->addr, 1); |
if (rc < 0) { |
cons_printf("error writing mem\n"); |
return rc; |
} |
} |
|
return 0; |
} |
|
void arch_event_breakpoint(thash_t thread_hash) |
{ |
static istate_t istate; |
breakpoint_t *b; |
int rc; |
|
rc = udebug_regs_read(app_phone, thread_hash, &istate); |
// cons_printf("udebug_regs_read -> %d\n", rc); |
// cons_printf("RIP was 0x%08x\n", istate.rip); |
int brk_addr = istate.rip - 1; |
|
b = breakpoint_find_by_addr(brk_addr); |
if (!b) { |
cons_printf("unrecognized breakpoint at 0x%x\n", brk_addr); |
return; |
} |
|
istate.rip = brk_addr; |
istate.rflags |= 0x0100; /* trap flag */ |
|
rc = udebug_regs_write(app_phone, thread_hash, &istate); |
if (rc < 0) { cons_printf("error writing regs\n"); return; } |
rc = udebug_mem_write(app_phone, &b->arch.back, brk_addr, 1); |
if (rc < 0) { cons_printf("error writing mem\n"); return; } |
// cons_printf("udebug_mem_write(phone, 0x%x, 0x%02x, 1) -> %d\n", brk_addr, brk_list[bi].arch.back, rc); |
|
b->active = true; |
active_bkpt = b; |
|
breakpoint_hit(b); |
} |
|
void arch_event_trap(dthread_t *dt) |
{ |
breakpoint_t *b; |
static istate_t istate; |
unsigned char brkinstr[1]; |
int rc; |
|
// cons_printf("trap event\n"); |
b = active_bkpt; |
|
if (b) { |
brkinstr[0] = OPCODE_INT3; |
rc = udebug_mem_write(app_phone, brkinstr, b->addr, 1); |
// cons_printf("restore breakpoint -> %d\n", rc); |
active_bkpt = NULL; |
} |
|
rc = _set_trap_flag(dt, false); |
dt->arch.singlestep = false; |
|
singlestep_hit(); |
} |
|
void arch_dump_regs(thash_t thash) |
{ |
static istate_t istate; |
int rc; |
|
rc = udebug_regs_read(app_phone, thash, &istate); |
if (rc < 0) { cons_printf("Error reading regs\n"); return; } |
|
cons_printf( |
"rip:%016x rflags:%016x rax:%016x rcx:%016x ecx:%016x " |
"rdx:%016x\nrsi:%016x rdi:%016x r8:%016x r9:%016x " |
"r10:%016x r11:%016x cs:%04x\n", |
istate.rip, istate.rflags, istate.rax, istate.rcx, |
istate.rdx, istate.rsi, istate.rdi, istate.r8, istate.r9, |
istate.r10, istate.r11, istate.cs); |
} |
|
void arch_singlestep(dthread_t *dt) |
{ |
int rc; |
|
rc = _set_trap_flag(dt, true); |
if (rc != 0) return; |
|
dthread_resume(dt); |
} |
|
/** @} |
*/ |