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