diff options
Diffstat (limited to 'debuggerd/mips/machine.c')
| -rw-r--r-- | debuggerd/mips/machine.c | 179 |
1 files changed, 0 insertions, 179 deletions
diff --git a/debuggerd/mips/machine.c b/debuggerd/mips/machine.c deleted file mode 100644 index 65fdf02..0000000 --- a/debuggerd/mips/machine.c +++ /dev/null @@ -1,179 +0,0 @@ -/* system/debuggerd/debuggerd.c -** -** Copyright 2012, The Android Open Source Project -** -** Licensed under the Apache License, Version 2.0 (the "License"); -** you may not use this file except in compliance with the License. -** You may obtain a copy of the License at -** -** http://www.apache.org/licenses/LICENSE-2.0 -** -** Unless required by applicable law or agreed to in writing, software -** distributed under the License is distributed on an "AS IS" BASIS, -** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -** See the License for the specific language governing permissions and -** limitations under the License. -*/ - -#include <stddef.h> -#include <stdbool.h> -#include <stdlib.h> -#include <string.h> -#include <stdio.h> -#include <errno.h> -#include <sys/types.h> -#include <sys/ptrace.h> - -#include <corkscrew/ptrace.h> - -#include <linux/user.h> - -#include "../utility.h" -#include "../machine.h" - -/* enable to dump memory pointed to by every register */ -#define DUMP_MEMORY_FOR_ALL_REGISTERS 1 - -#define R(x) ((unsigned int)(x)) - -static void dump_memory(log_t* log, pid_t tid, uintptr_t addr, int scopeFlags) { - char code_buffer[64]; /* actual 8+1+((8+1)*4) + 1 == 45 */ - char ascii_buffer[32]; /* actual 16 + 1 == 17 */ - uintptr_t p, end; - - p = addr & ~3; - p -= 32; - if (p > addr) { - /* catch underflow */ - p = 0; - } - end = p + 80; - /* catch overflow; 'end - p' has to be multiples of 16 */ - while (end < p) - end -= 16; - - /* Dump the code around PC as: - * addr contents ascii - * 00008d34 ef000000 e8bd0090 e1b00000 512fff1e ............../Q - * 00008d44 ea00b1f9 e92d0090 e3a070fc ef000000 ......-..p...... - */ - while (p < end) { - char* asc_out = ascii_buffer; - - sprintf(code_buffer, "%08x ", p); - - int i; - for (i = 0; i < 4; i++) { - /* - * If we see (data == -1 && errno != 0), we know that the ptrace - * call failed, probably because we're dumping memory in an - * unmapped or inaccessible page. I don't know if there's - * value in making that explicit in the output -- it likely - * just complicates parsing and clarifies nothing for the - * enlightened reader. - */ - long data = ptrace(PTRACE_PEEKTEXT, tid, (void*)p, NULL); - sprintf(code_buffer + strlen(code_buffer), "%08lx ", data); - - int j; - for (j = 0; j < 4; j++) { - /* - * Our isprint() allows high-ASCII characters that display - * differently (often badly) in different viewers, so we - * just use a simpler test. - */ - char val = (data >> (j*8)) & 0xff; - if (val >= 0x20 && val < 0x7f) { - *asc_out++ = val; - } else { - *asc_out++ = '.'; - } - } - p += 4; - } - *asc_out = '\0'; - _LOG(log, scopeFlags, " %s %s\n", code_buffer, ascii_buffer); - } -} - -/* - * If configured to do so, dump memory around *all* registers - * for the crashing thread. - */ -void dump_memory_and_code(const ptrace_context_t* context __attribute((unused)), - log_t* log, pid_t tid, bool at_fault) { - pt_regs_mips_t r; - if(ptrace(PTRACE_GETREGS, tid, 0, &r)) { - return; - } - - int scopeFlags = at_fault ? SCOPE_AT_FAULT : 0; - if (at_fault && DUMP_MEMORY_FOR_ALL_REGISTERS) { - static const char REG_NAMES[] = "$0atv0v1a0a1a2a3t0t1t2t3t4t5t6t7s0s1s2s3s4s5s6s7t8t9k0k1gpsps8ra"; - - for (int reg = 0; reg < 32; reg++) { - /* skip uninteresting registers */ - if (reg == 0 /* $0 */ - || reg == 26 /* $k0 */ - || reg == 27 /* $k1 */ - || reg == 31 /* $ra (done below) */ - ) - continue; - - uintptr_t addr = R(r.regs[reg]); - - /* - * Don't bother if it looks like a small int or ~= null, or if - * it's in the kernel area. - */ - if (addr < 4096 || addr >= 0x80000000) { - continue; - } - - _LOG(log, scopeFlags | SCOPE_SENSITIVE, "\nmemory near %.2s:\n", ®_NAMES[reg * 2]); - dump_memory(log, tid, addr, scopeFlags | SCOPE_SENSITIVE); - } - } - - unsigned int pc = R(r.cp0_epc); - unsigned int ra = R(r.regs[31]); - - _LOG(log, scopeFlags, "\ncode around pc:\n"); - dump_memory(log, tid, (uintptr_t)pc, scopeFlags); - - if (pc != ra) { - _LOG(log, scopeFlags, "\ncode around ra:\n"); - dump_memory(log, tid, (uintptr_t)ra, scopeFlags); - } -} - -void dump_registers(const ptrace_context_t* context __attribute((unused)), - log_t* log, pid_t tid, bool at_fault) -{ - pt_regs_mips_t r; - int scopeFlags = at_fault ? SCOPE_AT_FAULT : 0; - - if(ptrace(PTRACE_GETREGS, tid, 0, &r)) { - _LOG(log, scopeFlags, "cannot get registers: %s\n", strerror(errno)); - return; - } - - _LOG(log, scopeFlags, " zr %08x at %08x v0 %08x v1 %08x\n", - R(r.regs[0]), R(r.regs[1]), R(r.regs[2]), R(r.regs[3])); - _LOG(log, scopeFlags, " a0 %08x a1 %08x a2 %08x a3 %08x\n", - R(r.regs[4]), R(r.regs[5]), R(r.regs[6]), R(r.regs[7])); - _LOG(log, scopeFlags, " t0 %08x t1 %08x t2 %08x t3 %08x\n", - R(r.regs[8]), R(r.regs[9]), R(r.regs[10]), R(r.regs[11])); - _LOG(log, scopeFlags, " t4 %08x t5 %08x t6 %08x t7 %08x\n", - R(r.regs[12]), R(r.regs[13]), R(r.regs[14]), R(r.regs[15])); - _LOG(log, scopeFlags, " s0 %08x s1 %08x s2 %08x s3 %08x\n", - R(r.regs[16]), R(r.regs[17]), R(r.regs[18]), R(r.regs[19])); - _LOG(log, scopeFlags, " s4 %08x s5 %08x s6 %08x s7 %08x\n", - R(r.regs[20]), R(r.regs[21]), R(r.regs[22]), R(r.regs[23])); - _LOG(log, scopeFlags, " t8 %08x t9 %08x k0 %08x k1 %08x\n", - R(r.regs[24]), R(r.regs[25]), R(r.regs[26]), R(r.regs[27])); - _LOG(log, scopeFlags, " gp %08x sp %08x s8 %08x ra %08x\n", - R(r.regs[28]), R(r.regs[29]), R(r.regs[30]), R(r.regs[31])); - _LOG(log, scopeFlags, " hi %08x lo %08x bva %08x epc %08x\n", - R(r.hi), R(r.lo), R(r.cp0_badvaddr), R(r.cp0_epc)); -} |