| // Copyright 2016 The Fuchsia Authors |
| // Copyright (c) 2008-2012 Travis Geiselbrecht |
| // |
| // Use of this source code is governed by a MIT-style |
| // license that can be found in the LICENSE file or at |
| // https://opensource.org/licenses/MIT |
| |
| #include <arch.h> |
| #include <arch/ops.h> |
| #include <ctype.h> |
| #include <debug.h> |
| #include <kernel/cmdline.h> |
| #include <kernel/thread.h> |
| #include <list.h> |
| #include <platform.h> |
| #include <platform/debug.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <vm/pmm.h> |
| #include <zircon/time.h> |
| #include <zircon/types.h> |
| |
| #include <lib/console.h> |
| |
| |
| static int cmd_display_mem(int argc, const cmd_args *argv, uint32_t flags); |
| static int cmd_modify_mem(int argc, const cmd_args *argv, uint32_t flags); |
| static int cmd_fill_mem(int argc, const cmd_args *argv, uint32_t flags); |
| static int cmd_reset(int argc, const cmd_args *argv, uint32_t flags); |
| static int cmd_memtest(int argc, const cmd_args *argv, uint32_t flags); |
| static int cmd_copy_mem(int argc, const cmd_args *argv, uint32_t flags); |
| static int cmd_sleep(int argc, const cmd_args *argv, uint32_t flags); |
| static int cmd_crash(int argc, const cmd_args *argv, uint32_t flags); |
| static int cmd_stackstomp(int argc, const cmd_args *argv, uint32_t flags); |
| static int cmd_cmdline(int argc, const cmd_args *argv, uint32_t flags); |
| |
| STATIC_COMMAND_START |
| #if LK_DEBUGLEVEL > 0 |
| STATIC_COMMAND_MASKED("dw", "display memory in words", &cmd_display_mem, CMD_AVAIL_ALWAYS) |
| STATIC_COMMAND_MASKED("dh", "display memory in halfwords", &cmd_display_mem, CMD_AVAIL_ALWAYS) |
| STATIC_COMMAND_MASKED("db", "display memory in bytes", &cmd_display_mem, CMD_AVAIL_ALWAYS) |
| STATIC_COMMAND_MASKED("mw", "modify word of memory", &cmd_modify_mem, CMD_AVAIL_ALWAYS) |
| STATIC_COMMAND_MASKED("mh", "modify halfword of memory", &cmd_modify_mem, CMD_AVAIL_ALWAYS) |
| STATIC_COMMAND_MASKED("mb", "modify byte of memory", &cmd_modify_mem, CMD_AVAIL_ALWAYS) |
| STATIC_COMMAND_MASKED("fw", "fill range of memory by word", &cmd_fill_mem, CMD_AVAIL_ALWAYS) |
| STATIC_COMMAND_MASKED("fh", "fill range of memory by halfword", &cmd_fill_mem, CMD_AVAIL_ALWAYS) |
| STATIC_COMMAND_MASKED("fb", "fill range of memory by byte", &cmd_fill_mem, CMD_AVAIL_ALWAYS) |
| STATIC_COMMAND_MASKED("mc", "copy a range of memory", &cmd_copy_mem, CMD_AVAIL_ALWAYS) |
| STATIC_COMMAND("crash", "intentionally crash", &cmd_crash) |
| STATIC_COMMAND("stackstomp", "intentionally overrun the stack", &cmd_stackstomp) |
| #endif |
| #if LK_DEBUGLEVEL > 1 |
| STATIC_COMMAND("mtest", "simple memory test", &cmd_memtest) |
| #endif |
| STATIC_COMMAND("cmdline", "display kernel commandline", &cmd_cmdline) |
| STATIC_COMMAND("sleep", "sleep number of seconds", &cmd_sleep) |
| STATIC_COMMAND("sleepm", "sleep number of milliseconds", &cmd_sleep) |
| STATIC_COMMAND_END(mem); |
| |
| static int cmd_display_mem(int argc, const cmd_args *argv, uint32_t flags) |
| { |
| /* save the last address and len so we can continue where we left off */ |
| static unsigned long address; |
| static size_t len; |
| |
| if (argc < 3 && len == 0) { |
| printf("not enough arguments\n"); |
| printf("%s [-l] [-b] [address] [length]\n", argv[0].str); |
| return -1; |
| } |
| |
| int size; |
| if (strcmp(argv[0].str, "dw") == 0) { |
| size = 4; |
| } else if (strcmp(argv[0].str, "dh") == 0) { |
| size = 2; |
| } else { |
| size = 1; |
| } |
| |
| uint byte_order = BYTE_ORDER; |
| int argindex = 1; |
| bool read_address = false; |
| while (argc > argindex) { |
| if (!strcmp(argv[argindex].str, "-l")) { |
| byte_order = LITTLE_ENDIAN; |
| } else if (!strcmp(argv[argindex].str, "-b")) { |
| byte_order = BIG_ENDIAN; |
| } else if (!read_address) { |
| address = argv[argindex].u; |
| read_address = true; |
| } else { |
| len = argv[argindex].u; |
| } |
| |
| argindex++; |
| } |
| |
| unsigned long stop = address + len; |
| int count = 0; |
| |
| if ((address & (size - 1)) != 0) { |
| printf("unaligned address, cannot display\n"); |
| return -1; |
| } |
| |
| /* preflight the start address to see if it's mapped */ |
| if (vaddr_to_paddr((void *)address) == 0) { |
| printf("ERROR: address 0x%lx is unmapped\n", address); |
| return -1; |
| } |
| |
| for ( ; address < stop; address += size) { |
| if (count == 0) |
| printf("0x%08lx: ", address); |
| switch (size) { |
| case 4: { |
| uint32_t val = (byte_order != BYTE_ORDER) ? |
| SWAP_32(*(uint32_t *)address) : |
| *(uint32_t *)address; |
| printf("%08x ", val); |
| break; |
| } |
| case 2: { |
| uint16_t val = (byte_order != BYTE_ORDER) ? |
| SWAP_16(*(uint16_t *)address) : |
| *(uint16_t *)address; |
| printf("%04hx ", val); |
| break; |
| } |
| case 1: |
| printf("%02hhx ", *(uint8_t *)address); |
| break; |
| } |
| count += size; |
| if (count == 16) { |
| printf("\n"); |
| count = 0; |
| } |
| } |
| |
| if (count != 0) |
| printf("\n"); |
| |
| return 0; |
| } |
| |
| static int cmd_modify_mem(int argc, const cmd_args *argv, uint32_t flags) |
| { |
| int size; |
| |
| if (argc < 3) { |
| printf("not enough arguments\n"); |
| printf("%s <address> <val>\n", argv[0].str); |
| return -1; |
| } |
| |
| if (strcmp(argv[0].str, "mw") == 0) { |
| size = 4; |
| } else if (strcmp(argv[0].str, "mh") == 0) { |
| size = 2; |
| } else { |
| size = 1; |
| } |
| |
| unsigned long address = argv[1].u; |
| unsigned long val = argv[2].u; |
| |
| if ((address & (size - 1)) != 0) { |
| printf("unaligned address, cannot modify\n"); |
| return -1; |
| } |
| |
| switch (size) { |
| case 4: |
| *(uint32_t *)address = (uint32_t)val; |
| break; |
| case 2: |
| *(uint16_t *)address = (uint16_t)val; |
| break; |
| case 1: |
| *(uint8_t *)address = (uint8_t)val; |
| break; |
| } |
| |
| return 0; |
| } |
| |
| static int cmd_fill_mem(int argc, const cmd_args *argv, uint32_t flags) |
| { |
| int size; |
| |
| if (argc < 4) { |
| printf("not enough arguments\n"); |
| printf("%s <address> <len> <val>\n", argv[0].str); |
| return -1; |
| } |
| |
| if (strcmp(argv[0].str, "fw") == 0) { |
| size = 4; |
| } else if (strcmp(argv[0].str, "fh") == 0) { |
| size = 2; |
| } else { |
| size = 1; |
| } |
| |
| unsigned long address = argv[1].u; |
| unsigned long len = argv[2].u; |
| unsigned long stop = address + len; |
| unsigned long val = argv[3].u; |
| |
| if ((address & (size - 1)) != 0) { |
| printf("unaligned address, cannot modify\n"); |
| return -1; |
| } |
| |
| for ( ; address < stop; address += size) { |
| switch (size) { |
| case 4: |
| *(uint32_t *)address = (uint32_t)val; |
| break; |
| case 2: |
| *(uint16_t *)address = (uint16_t)val; |
| break; |
| case 1: |
| *(uint8_t *)address = (uint8_t)val; |
| break; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static int cmd_copy_mem(int argc, const cmd_args *argv, uint32_t flags) |
| { |
| if (argc < 4) { |
| printf("not enough arguments\n"); |
| printf("%s <source address> <target address> <len>\n", argv[0].str); |
| return -1; |
| } |
| |
| addr_t source = argv[1].u; |
| addr_t target = argv[2].u; |
| size_t len = argv[3].u; |
| |
| memcpy((void *)target, (const void *)source, len); |
| |
| return 0; |
| } |
| |
| static int cmd_memtest(int argc, const cmd_args *argv, uint32_t flags) |
| { |
| if (argc < 3) { |
| printf("not enough arguments\n"); |
| printf("%s <base> <len>\n", argv[0].str); |
| return -1; |
| } |
| |
| uint32_t *ptr; |
| size_t len; |
| |
| ptr = (uint32_t *)argv[1].u; |
| len = (size_t)argv[2].u; |
| |
| size_t i; |
| // write out |
| printf("writing first pass..."); |
| for (i = 0; i < len / 4; i++) { |
| ptr[i] = static_cast<uint32_t>(i); |
| } |
| printf("done\n"); |
| |
| // verify |
| printf("verifying..."); |
| for (i = 0; i < len / 4; i++) { |
| if (ptr[i] != i) |
| printf("error at %p\n", &ptr[i]); |
| } |
| printf("done\n"); |
| |
| return 0; |
| } |
| |
| static int cmd_sleep(int argc, const cmd_args *argv, uint32_t flags) |
| { |
| zx_duration_t t = ZX_SEC(1); /* default to 1 second */ |
| |
| if (argc >= 2) { |
| t = ZX_MSEC(argv[1].u); |
| if (!strcmp(argv[0].str, "sleep")) |
| t = zx_duration_mul_int64(t, 1000); |
| } |
| |
| thread_sleep_relative(t); |
| |
| return 0; |
| } |
| |
| static int crash_thread(void *) |
| { |
| /* should crash */ |
| volatile uint32_t *ptr = (volatile uint32_t *)1u; |
| *ptr = 1; |
| |
| return 0; |
| } |
| |
| static int cmd_crash(int argc, const cmd_args *argv, uint32_t flags) |
| { |
| if (argc > 1) { |
| if (!strcmp(argv[1].str, "thread")) { |
| thread_t *t = thread_create("crasher", &crash_thread, NULL, DEFAULT_PRIORITY); |
| thread_resume(t); |
| |
| thread_join(t, NULL, ZX_TIME_INFINITE); |
| return 0; |
| } |
| } |
| |
| crash_thread(nullptr); |
| |
| /* if it didn't, panic the system */ |
| panic("crash"); |
| |
| return 0; |
| } |
| |
| __attribute__((noinline)) static void stomp_stack(size_t size) { |
| // -Wvla prevents VLAs but not explicit alloca. |
| // Neither is allowed anywhere in the kernel outside this test code. |
| void* death = __builtin_alloca(size); // OK in test-only code. |
| memset(death, 0xaa, size); |
| thread_sleep_relative(ZX_USEC(1)); |
| } |
| |
| static int cmd_stackstomp(int argc, const cmd_args *argv, uint32_t flags) |
| { |
| for (size_t i = 0; i < DEFAULT_STACK_SIZE * 2; i++) |
| stomp_stack(i); |
| |
| printf("survived.\n"); |
| |
| return 0; |
| } |
| |
| #define DEBUG_CMDLINE_MAX 1024 |
| static int cmd_cmdline(int argc, const cmd_args *argv, uint32_t flags) |
| { |
| if (argc == 1) { |
| char cmdline_buf[DEBUG_CMDLINE_MAX]; |
| memset(cmdline_buf, 0, DEBUG_CMDLINE_MAX); |
| const char* cmdline = cmdline_get(NULL); |
| for (size_t i = 0; i < DEBUG_CMDLINE_MAX; i++) { |
| if (cmdline[i] == '\0') { |
| if (cmdline[i+1] == '\0') { |
| break; |
| } |
| cmdline_buf[i] = ' '; |
| } else { |
| cmdline_buf[i] = cmdline[i]; |
| } |
| } |
| printf("cmdline: %s\n", cmdline_buf); |
| } else { |
| const char* key = argv[1].str; |
| const char* val = cmdline_get(key); |
| if (!val) { |
| printf("cmdline: %s not found\n", key); |
| } else { |
| printf("cmdline: %s=%s\n", key, val); |
| } |
| } |
| |
| return 0; |
| } |