X-Git-Url: https://review.openocd.org/gitweb?p=openocd.git;a=blobdiff_plain;f=src%2Ftarget%2Farmv4_5.c;h=aba44319694955caf41fed9b7e7e649066ee99b3;hp=3eab03354bc6ceb3386f5a74d4aad0ef9fe1a27f;hb=d6c8945662e6027f6ba12d73bac2473088672db5;hpb=e9297b40b994f071474210e7d9e224d50e25fcaf diff --git a/src/target/armv4_5.c b/src/target/armv4_5.c index 3eab03354b..aba4431969 100644 --- a/src/target/armv4_5.c +++ b/src/target/armv4_5.c @@ -2,6 +2,12 @@ * Copyright (C) 2005 by Dominic Rath * * Dominic.Rath@gmx.de * * * + * Copyright (C) 2008 by Spencer Oliver * + * spen@spen-soft.co.uk * + * * + * Copyright (C) 2008 by Oyvind Harboe * + * oyvind.harboe@zylin.com * + * * * This program is free software; you can redistribute it and/or modify * * it under the terms of the GNU General Public License as published by * * the Free Software Foundation; either version 2 of the License, or * @@ -21,68 +27,96 @@ #include "config.h" #endif -#include "replacements.h" - -#include "arm_disassembler.h" - #include "armv4_5.h" - -#include "target.h" -#include "register.h" -#include "log.h" +#include "arm_jtag.h" +#include "breakpoints.h" +#include "arm_disassembler.h" #include "binarybuffer.h" -#include "command.h" - -#include -#include -#include +#include "algorithm.h" +#include "register.h" -bitfield_desc_t armv4_5_psr_bitfield_desc[] = -{ - {"M[4:0]", 5}, - {"T", 1}, - {"F", 1}, - {"I", 1}, - {"reserved", 16}, - {"J", 1}, - {"reserved", 2}, - {"Q", 1}, - {"V", 1}, - {"C", 1}, - {"Z", 1}, - {"N", 1}, -}; char* armv4_5_core_reg_list[] = { "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", "r8", "r9", "r10", "r11", "r12", "r13_usr", "lr_usr", "pc", - + "r8_fiq", "r9_fiq", "r10_fiq", "r11_fiq", "r12_fiq", "r13_fiq", "lr_fiq", - + "r13_irq", "lr_irq", - + "r13_svc", "lr_svc", - + "r13_abt", "lr_abt", - + "r13_und", "lr_und", - + "cpsr", "spsr_fiq", "spsr_irq", "spsr_svc", "spsr_abt", "spsr_und" }; -char* armv4_5_mode_strings[] = +static const char *armv4_5_mode_strings_list[] = { - "User", "FIQ", "IRQ", "Supervisor", "Abort", "Undefined", "System" + "Illegal mode value", "User", "FIQ", "IRQ", "Supervisor", "Abort", "Undefined", "System" }; +/* Hack! Yuk! allow -1 index, which simplifies codepaths elsewhere in the code */ +const char **armv4_5_mode_strings = armv4_5_mode_strings_list + 1; + +/** Map PSR mode bits to linear number */ +int armv4_5_mode_to_number(enum armv4_5_mode mode) +{ + switch (mode) { + case ARMV4_5_MODE_ANY: + /* map MODE_ANY to user mode */ + case ARMV4_5_MODE_USR: + return 0; + case ARMV4_5_MODE_FIQ: + return 1; + case ARMV4_5_MODE_IRQ: + return 2; + case ARMV4_5_MODE_SVC: + return 3; + case ARMV4_5_MODE_ABT: + return 4; + case ARMV4_5_MODE_UND: + return 5; + case ARMV4_5_MODE_SYS: + return 6; + default: + LOG_ERROR("invalid mode value encountered %d", mode); + return -1; + } +} + +/** Map linear number to PSR mode bits. */ +enum armv4_5_mode armv4_5_number_to_mode(int number) +{ + switch (number) { + case 0: + return ARMV4_5_MODE_USR; + case 1: + return ARMV4_5_MODE_FIQ; + case 2: + return ARMV4_5_MODE_IRQ; + case 3: + return ARMV4_5_MODE_SVC; + case 4: + return ARMV4_5_MODE_ABT; + case 5: + return ARMV4_5_MODE_UND; + case 6: + return ARMV4_5_MODE_SYS; + default: + LOG_ERROR("mode index out of bounds %d", number); + return ARMV4_5_MODE_ANY; + } +} + char* armv4_5_state_strings[] = { "ARM", "Thumb", "Jazelle" }; -int armv4_5_core_reg_arch_type = -1; - -armv4_5_core_reg_t armv4_5_core_reg_list_arch_info[] = +struct armv4_5_core_reg armv4_5_core_reg_list_arch_info[] = { {0, ARMV4_5_MODE_ANY, NULL, NULL}, {1, ARMV4_5_MODE_ANY, NULL, NULL}, @@ -100,7 +134,7 @@ armv4_5_core_reg_t armv4_5_core_reg_list_arch_info[] = {13, ARMV4_5_MODE_USR, NULL, NULL}, {14, ARMV4_5_MODE_USR, NULL, NULL}, {15, ARMV4_5_MODE_ANY, NULL, NULL}, - + {8, ARMV4_5_MODE_FIQ, NULL, NULL}, {9, ARMV4_5_MODE_FIQ, NULL, NULL}, {10, ARMV4_5_MODE_FIQ, NULL, NULL}, @@ -108,7 +142,7 @@ armv4_5_core_reg_t armv4_5_core_reg_list_arch_info[] = {12, ARMV4_5_MODE_FIQ, NULL, NULL}, {13, ARMV4_5_MODE_FIQ, NULL, NULL}, {14, ARMV4_5_MODE_FIQ, NULL, NULL}, - + {13, ARMV4_5_MODE_IRQ, NULL, NULL}, {14, ARMV4_5_MODE_IRQ, NULL, NULL}, @@ -117,10 +151,10 @@ armv4_5_core_reg_t armv4_5_core_reg_list_arch_info[] = {13, ARMV4_5_MODE_ABT, NULL, NULL}, {14, ARMV4_5_MODE_ABT, NULL, NULL}, - + {13, ARMV4_5_MODE_UND, NULL, NULL}, {14, ARMV4_5_MODE_UND, NULL, NULL}, - + {16, ARMV4_5_MODE_ANY, NULL, NULL}, {16, ARMV4_5_MODE_FIQ, NULL, NULL}, {16, ARMV4_5_MODE_IRQ, NULL, NULL}, @@ -155,86 +189,74 @@ int armv4_5_core_reg_map[7][17] = } }; -u8 armv4_5_gdb_dummy_fp_value[] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}; +static const uint8_t arm_gdb_dummy_fp_value[12]; -reg_t armv4_5_gdb_dummy_fp_reg = +/** + * Dummy FPA registers are required to support GDB on ARM. + * Register packets require eight obsolete FPA register values. + * Modern ARM cores use Vector Floating Point (VFP), if they + * have any floating point support. VFP is not FPA-compatible. + */ +struct reg arm_gdb_dummy_fp_reg = { - "GDB dummy floating-point register", armv4_5_gdb_dummy_fp_value, 0, 1, 96, NULL, 0, NULL, 0 + .name = "GDB dummy FPA register", + .value = (uint8_t *) arm_gdb_dummy_fp_value, + .valid = 1, + .size = 96, }; -u8 armv4_5_gdb_dummy_fps_value[] = {0, 0, 0, 0}; +static const uint8_t arm_gdb_dummy_fps_value[4]; -reg_t armv4_5_gdb_dummy_fps_reg = +/** + * Dummy FPA status registers are required to support GDB on ARM. + * Register packets require an obsolete FPA status register. + */ +struct reg arm_gdb_dummy_fps_reg = { - "GDB dummy floating-point status register", armv4_5_gdb_dummy_fps_value, 0, 1, 32, NULL, 0, NULL, 0 + .name = "GDB dummy FPA status register", + .value = (uint8_t *) arm_gdb_dummy_fps_value, + .valid = 1, + .size = 32, }; -/* map psr mode bits to linear number */ -int armv4_5_mode_to_number(enum armv4_5_mode mode) -{ - switch (mode) - { - case 16: return 0; break; - case 17: return 1; break; - case 18: return 2; break; - case 19: return 3; break; - case 23: return 4; break; - case 27: return 5; break; - case 31: return 6; break; - case -1: return 0; break; /* map MODE_ANY to user mode */ - default: - ERROR("invalid mode value encountered"); - return -1; - } -} +static void arm_gdb_dummy_init(void) __attribute__ ((constructor)); -/* map linear number to mode bits */ -enum armv4_5_mode armv4_5_number_to_mode(int number) +static void arm_gdb_dummy_init(void) { - switch(number) - { - case 0: return ARMV4_5_MODE_USR; break; - case 1: return ARMV4_5_MODE_FIQ; break; - case 2: return ARMV4_5_MODE_IRQ; break; - case 3: return ARMV4_5_MODE_SVC; break; - case 4: return ARMV4_5_MODE_ABT; break; - case 5: return ARMV4_5_MODE_UND; break; - case 6: return ARMV4_5_MODE_SYS; break; - default: - ERROR("mode index out of bounds"); - return -1; - } -}; + register_init_dummy(&arm_gdb_dummy_fp_reg); + register_init_dummy(&arm_gdb_dummy_fps_reg); +} -int armv4_5_get_core_reg(reg_t *reg) +int armv4_5_get_core_reg(struct reg *reg) { int retval; - armv4_5_core_reg_t *armv4_5 = reg->arch_info; - target_t *target = armv4_5->target; - + struct armv4_5_core_reg *armv4_5 = reg->arch_info; + struct target *target = armv4_5->target; + if (target->state != TARGET_HALTED) { + LOG_ERROR("Target not halted"); return ERROR_TARGET_NOT_HALTED; } - - //retval = armv4_5->armv4_5_common->full_context(target); + + /* retval = armv4_5->armv4_5_common->full_context(target); */ retval = armv4_5->armv4_5_common->read_core_reg(target, armv4_5->num, armv4_5->mode); - + return retval; } -int armv4_5_set_core_reg(reg_t *reg, u8 *buf) +int armv4_5_set_core_reg(struct reg *reg, uint8_t *buf) { - armv4_5_core_reg_t *armv4_5 = reg->arch_info; - target_t *target = armv4_5->target; - armv4_5_common_t *armv4_5_target = target->arch_info; - u32 value = buf_get_u32(buf, 0, 32); - + struct armv4_5_core_reg *armv4_5 = reg->arch_info; + struct target *target = armv4_5->target; + struct armv4_5_common_s *armv4_5_target = target_to_armv4_5(target); + uint32_t value = buf_get_u32(buf, 0, 32); + if (target->state != TARGET_HALTED) { return ERROR_TARGET_NOT_HALTED; } - + if (reg == &armv4_5_target->core_cache->reg_list[ARMV4_5_CPSR]) { if (value & 0x20) @@ -243,8 +265,8 @@ int armv4_5_set_core_reg(reg_t *reg, u8 *buf) if (armv4_5_target->core_state == ARMV4_5_STATE_ARM) { /* change state to Thumb */ - DEBUG("changing to Thumb state"); - armv4_5_target->core_state = ARMV4_5_STATE_THUMB; + LOG_DEBUG("changing to Thumb state"); + armv4_5_target->core_state = ARMV4_5_STATE_THUMB; } } else @@ -253,12 +275,19 @@ int armv4_5_set_core_reg(reg_t *reg, u8 *buf) if (armv4_5_target->core_state == ARMV4_5_STATE_THUMB) { /* change state to ARM */ - DEBUG("changing to ARM state"); - armv4_5_target->core_state = ARMV4_5_STATE_ARM; + LOG_DEBUG("changing to ARM state"); + armv4_5_target->core_state = ARMV4_5_STATE_ARM; } } + + if (armv4_5_target->core_mode != (enum armv4_5_mode)(value & 0x1f)) + { + LOG_DEBUG("changing ARM core mode to '%s'", armv4_5_mode_strings[armv4_5_mode_to_number(value & 0x1f)]); + armv4_5_target->core_mode = value & 0x1f; + armv4_5_target->write_core_reg(target, 16, ARMV4_5_MODE_ANY, value); + } } - + buf_set_u32(reg->value, 0, 32, value); reg->dirty = 1; reg->valid = 1; @@ -266,36 +295,38 @@ int armv4_5_set_core_reg(reg_t *reg, u8 *buf) return ERROR_OK; } -int armv4_5_invalidate_core_regs(target_t *target) +static const struct reg_arch_type arm_reg_type = { + .get = armv4_5_get_core_reg, + .set = armv4_5_set_core_reg, +}; + +int armv4_5_invalidate_core_regs(struct target *target) { - armv4_5_common_t *armv4_5 = target->arch_info; + struct armv4_5_common_s *armv4_5 = target_to_armv4_5(target); int i; - + for (i = 0; i < 37; i++) { armv4_5->core_cache->reg_list[i].valid = 0; armv4_5->core_cache->reg_list[i].dirty = 0; } - + return ERROR_OK; } -reg_cache_t* armv4_5_build_reg_cache(target_t *target, armv4_5_common_t *armv4_5_common) +struct reg_cache* armv4_5_build_reg_cache(struct target *target, struct arm *armv4_5_common) { int num_regs = 37; - reg_cache_t *cache = malloc(sizeof(reg_cache_t)); - reg_t *reg_list = malloc(sizeof(reg_t) * num_regs); - armv4_5_core_reg_t *arch_info = malloc(sizeof(armv4_5_core_reg_t) * num_regs); + struct reg_cache *cache = malloc(sizeof(struct reg_cache)); + struct reg *reg_list = malloc(sizeof(struct reg) * num_regs); + struct armv4_5_core_reg *arch_info = malloc(sizeof(struct armv4_5_core_reg) * num_regs); int i; - + cache->name = "arm v4/5 registers"; cache->next = NULL; cache->reg_list = reg_list; cache->num_regs = num_regs; - - if (armv4_5_core_reg_arch_type == -1) - armv4_5_core_reg_arch_type = register_reg_arch_type(armv4_5_get_core_reg, armv4_5_set_core_reg); - + for (i = 0; i < 37; i++) { arch_info[i] = armv4_5_core_reg_list_arch_info[i]; @@ -306,56 +337,62 @@ reg_cache_t* armv4_5_build_reg_cache(target_t *target, armv4_5_common_t *armv4_5 reg_list[i].value = calloc(1, 4); reg_list[i].dirty = 0; reg_list[i].valid = 0; - reg_list[i].bitfield_desc = NULL; - reg_list[i].num_bitfields = 0; - reg_list[i].arch_type = armv4_5_core_reg_arch_type; + reg_list[i].type = &arm_reg_type; reg_list[i].arch_info = &arch_info[i]; } - + return cache; } -int armv4_5_arch_state(struct target_s *target, char *buf, int buf_size) +int armv4_5_arch_state(struct target *target) { - armv4_5_common_t *armv4_5 = target->arch_info; - + struct armv4_5_common_s *armv4_5 = target_to_armv4_5(target); + if (armv4_5->common_magic != ARMV4_5_COMMON_MAGIC) { - ERROR("BUG: called for a non-ARMv4/5 target"); - exit(-1); + LOG_ERROR("BUG: called for a non-ARMv4/5 target"); + return ERROR_FAIL; } - - snprintf(buf, buf_size, - "target halted in %s state due to %s, current mode: %s\ncpsr: 0x%8.8x pc: 0x%8.8x", + + LOG_USER("target halted in %s state due to %s, current mode: %s\ncpsr: 0x%8.8" PRIx32 " pc: 0x%8.8" PRIx32 "", armv4_5_state_strings[armv4_5->core_state], - target_debug_reason_strings[target->debug_reason], + Jim_Nvp_value2name_simple(nvp_target_debug_reason, target->debug_reason)->name, armv4_5_mode_strings[armv4_5_mode_to_number(armv4_5->core_mode)], buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 32), buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32)); - + return ERROR_OK; } -int handle_armv4_5_reg_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc) +COMMAND_HANDLER(handle_armv4_5_reg_command) { char output[128]; int output_len; int mode, num; - target_t *target = get_current_target(cmd_ctx); - armv4_5_common_t *armv4_5 = target->arch_info; - - if (armv4_5->common_magic != ARMV4_5_COMMON_MAGIC) + struct target *target = get_current_target(CMD_CTX); + struct armv4_5_common_s *armv4_5 = target_to_armv4_5(target); + + if (!is_arm(armv4_5)) { - command_print(cmd_ctx, "current target isn't an ARMV4/5 target"); - return ERROR_OK; + command_print(CMD_CTX, "current target isn't an ARM"); + return ERROR_FAIL; } - + if (target->state != TARGET_HALTED) { - command_print(cmd_ctx, "error: target must be halted for register accesses"); + command_print(CMD_CTX, "error: target must be halted for register accesses"); return ERROR_OK; } - + + if (armv4_5_mode_to_number(armv4_5->core_mode)==-1) + return ERROR_FAIL; + + if (!armv4_5->full_context) { + command_print(CMD_CTX, "error: target doesn't support %s", + CMD_NAME); + return ERROR_FAIL; + } + for (num = 0; num <= 15; num++) { output_len = 0; @@ -365,157 +402,242 @@ int handle_armv4_5_reg_command(struct command_context_s *cmd_ctx, char *cmd, cha { armv4_5->full_context(target); } - output_len += snprintf(output + output_len, 128 - output_len, "%8s: %8.8x ", ARMV4_5_CORE_REG_MODENUM(armv4_5->core_cache, mode, num).name, - buf_get_u32(ARMV4_5_CORE_REG_MODENUM(armv4_5->core_cache, mode, num).value, 0, 32)); + output_len += snprintf(output + output_len, + 128 - output_len, + "%8s: %8.8" PRIx32 " ", + ARMV4_5_CORE_REG_MODENUM(armv4_5->core_cache, mode, num).name, + buf_get_u32(ARMV4_5_CORE_REG_MODENUM(armv4_5->core_cache, mode, num).value, 0, 32)); } - command_print(cmd_ctx, output); + command_print(CMD_CTX, "%s", output); } - command_print(cmd_ctx, " cpsr: %8.8x spsr_fiq: %8.8x spsr_irq: %8.8x spsr_svc: %8.8x spsr_abt: %8.8x spsr_und: %8.8x", + command_print(CMD_CTX, + " cpsr: %8.8" PRIx32 " spsr_fiq: %8.8" PRIx32 " spsr_irq: %8.8" PRIx32 " spsr_svc: %8.8" PRIx32 " spsr_abt: %8.8" PRIx32 " spsr_und: %8.8" PRIx32 "", buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 32), buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_SPSR_FIQ].value, 0, 32), buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_SPSR_IRQ].value, 0, 32), buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_SPSR_SVC].value, 0, 32), buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_SPSR_ABT].value, 0, 32), buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_SPSR_UND].value, 0, 32)); - + return ERROR_OK; } -int handle_armv4_5_core_state_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc) +COMMAND_HANDLER(handle_armv4_5_core_state_command) { - target_t *target = get_current_target(cmd_ctx); - armv4_5_common_t *armv4_5 = target->arch_info; - - if (armv4_5->common_magic != ARMV4_5_COMMON_MAGIC) + struct target *target = get_current_target(CMD_CTX); + struct armv4_5_common_s *armv4_5 = target_to_armv4_5(target); + + if (!is_arm(armv4_5)) { - command_print(cmd_ctx, "current target isn't an ARMV4/5 target"); - return ERROR_OK; + command_print(CMD_CTX, "current target isn't an ARM"); + return ERROR_FAIL; } - - if (argc > 0) + + if (CMD_ARGC > 0) { - if (strcmp(args[0], "arm") == 0) + if (strcmp(CMD_ARGV[0], "arm") == 0) { armv4_5->core_state = ARMV4_5_STATE_ARM; } - if (strcmp(args[0], "thumb") == 0) + if (strcmp(CMD_ARGV[0], "thumb") == 0) { armv4_5->core_state = ARMV4_5_STATE_THUMB; } } - - command_print(cmd_ctx, "core state: %s", armv4_5_state_strings[armv4_5->core_state]); - + + command_print(CMD_CTX, "core state: %s", armv4_5_state_strings[armv4_5->core_state]); + return ERROR_OK; } -int handle_armv4_5_disassemble_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc) +COMMAND_HANDLER(handle_armv4_5_disassemble_command) { - target_t *target = get_current_target(cmd_ctx); - armv4_5_common_t *armv4_5 = target->arch_info; - u32 address; - int count; - int i; - arm_instruction_t cur_instruction; - u32 opcode; + int retval = ERROR_OK; + struct target *target = get_current_target(CMD_CTX); + struct arm *arm = target ? target_to_arm(target) : NULL; + uint32_t address; + int count = 1; int thumb = 0; - - if (armv4_5->common_magic != ARMV4_5_COMMON_MAGIC) - { - command_print(cmd_ctx, "current target isn't an ARMV4/5 target"); - return ERROR_OK; - } - - if (argc < 2) - { - command_print(cmd_ctx, "usage: armv4_5 disassemble
['thumb']"); - return ERROR_OK; - } - - address = strtoul(args[0], NULL, 0); - count = strtoul(args[1], NULL, 0); - - if (argc >= 3) - if (strcmp(args[2], "thumb") == 0) - thumb = 1; - - for (i = 0; i < count; i++) - { - target_read_u32(target, address, &opcode); - evaluate_opcode(opcode, address, &cur_instruction); - command_print(cmd_ctx, "%s", cur_instruction.text); - address += (thumb) ? 2 : 4; + + if (!is_arm(arm)) { + command_print(CMD_CTX, "current target isn't an ARM"); + return ERROR_FAIL; + } + + switch (CMD_ARGC) { + case 3: + if (strcmp(CMD_ARGV[2], "thumb") != 0) + goto usage; + thumb = 1; + /* FALL THROUGH */ + case 2: + COMMAND_PARSE_NUMBER(int, CMD_ARGV[1], count); + /* FALL THROUGH */ + case 1: + COMMAND_PARSE_NUMBER(u32, CMD_ARGV[0], address); + if (address & 0x01) { + if (!thumb) { + command_print(CMD_CTX, "Disassemble as Thumb"); + thumb = 1; + } + address &= ~1; + } + break; + default: +usage: + command_print(CMD_CTX, + "usage: arm disassemble
[ ['thumb']]"); + count = 0; + retval = ERROR_FAIL; + } + + while (count-- > 0) { + struct arm_instruction cur_instruction; + + if (thumb) { + /* Always use Thumb2 disassembly for best handling + * of 32-bit BL/BLX, and to work with newer cores + * (some ARMv6, all ARMv7) that use Thumb2. + */ + retval = thumb2_opcode(target, address, + &cur_instruction); + if (retval != ERROR_OK) + break; + } else { + uint32_t opcode; + + retval = target_read_u32(target, address, &opcode); + if (retval != ERROR_OK) + break; + retval = arm_evaluate_opcode(opcode, address, + &cur_instruction) != ERROR_OK; + if (retval != ERROR_OK) + break; + } + command_print(CMD_CTX, "%s", cur_instruction.text); + address += cur_instruction.instruction_size; } - - return ERROR_OK; + + return retval; } -int armv4_5_register_commands(struct command_context_s *cmd_ctx) +int armv4_5_register_commands(struct command_context *cmd_ctx) { - command_t *armv4_5_cmd; - - armv4_5_cmd = register_command(cmd_ctx, NULL, "armv4_5", NULL, COMMAND_ANY, "armv4/5 specific commands"); - - register_command(cmd_ctx, armv4_5_cmd, "reg", handle_armv4_5_reg_command, COMMAND_EXEC, "display ARM core registers"); - register_command(cmd_ctx, armv4_5_cmd, "core_state", handle_armv4_5_core_state_command, COMMAND_EXEC, "display/change ARM core state "); - - register_command(cmd_ctx, armv4_5_cmd, "disassemble", handle_armv4_5_disassemble_command, COMMAND_EXEC, "disassemble instructions
['thumb']"); + struct command *armv4_5_cmd; + + armv4_5_cmd = register_command(cmd_ctx, NULL, "arm", + NULL, COMMAND_ANY, + "generic ARM commands"); + + register_command(cmd_ctx, armv4_5_cmd, "reg", + handle_armv4_5_reg_command, COMMAND_EXEC, + "display ARM core registers"); + register_command(cmd_ctx, armv4_5_cmd, "core_state", + handle_armv4_5_core_state_command, COMMAND_EXEC, + "display/change ARM core state "); + register_command(cmd_ctx, armv4_5_cmd, "disassemble", + handle_armv4_5_disassemble_command, COMMAND_EXEC, + "disassemble instructions " + "
[ ['thumb']]"); + return ERROR_OK; } -int armv4_5_get_gdb_reg_list(target_t *target, reg_t **reg_list[], int *reg_list_size) +int armv4_5_get_gdb_reg_list(struct target *target, struct reg **reg_list[], int *reg_list_size) { - armv4_5_common_t *armv4_5 = target->arch_info; + struct armv4_5_common_s *armv4_5 = target_to_armv4_5(target); int i; - - if (target->state != TARGET_HALTED) - { - return ERROR_TARGET_NOT_HALTED; - } - + + if (armv4_5_mode_to_number(armv4_5->core_mode)==-1) + return ERROR_FAIL; + *reg_list_size = 26; - *reg_list = malloc(sizeof(reg_t*) * (*reg_list_size)); - + *reg_list = malloc(sizeof(struct reg*) * (*reg_list_size)); + for (i = 0; i < 16; i++) { (*reg_list)[i] = &ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, i); } - + for (i = 16; i < 24; i++) { - (*reg_list)[i] = &armv4_5_gdb_dummy_fp_reg; + (*reg_list)[i] = &arm_gdb_dummy_fp_reg; } - - (*reg_list)[24] = &armv4_5_gdb_dummy_fps_reg; + + (*reg_list)[24] = &arm_gdb_dummy_fps_reg; (*reg_list)[25] = &armv4_5->core_cache->reg_list[ARMV4_5_CPSR]; - + + return ERROR_OK; +} + +/* wait for execution to complete and check exit point */ +static int armv4_5_run_algorithm_completion(struct target *target, uint32_t exit_point, int timeout_ms, void *arch_info) +{ + int retval; + struct armv4_5_common_s *armv4_5 = target_to_armv4_5(target); + + if ((retval = target_wait_state(target, TARGET_HALTED, timeout_ms)) != ERROR_OK) + { + return retval; + } + if (target->state != TARGET_HALTED) + { + if ((retval = target_halt(target)) != ERROR_OK) + return retval; + if ((retval = target_wait_state(target, TARGET_HALTED, 500)) != ERROR_OK) + { + return retval; + } + return ERROR_TARGET_TIMEOUT; + } + + /* fast exit: ARMv5+ code can use BKPT */ + if (exit_point && buf_get_u32(armv4_5->core_cache->reg_list[15].value, + 0, 32) != exit_point) + { + LOG_WARNING("target reentered debug state, but not at the desired exit point: 0x%4.4" PRIx32 "", + buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32)); + return ERROR_TARGET_TIMEOUT; + } + return ERROR_OK; } -int armv4_5_run_algorithm(struct target_s *target, int num_mem_params, mem_param_t *mem_params, int num_reg_params, reg_param_t *reg_params, u32 entry_point, u32 exit_point, int timeout_ms, void *arch_info) +int armv4_5_run_algorithm_inner(struct target *target, int num_mem_params, struct mem_param *mem_params, int num_reg_params, struct reg_param *reg_params, uint32_t entry_point, uint32_t exit_point, int timeout_ms, void *arch_info, int (*run_it)(struct target *target, uint32_t exit_point, int timeout_ms, void *arch_info)) { - armv4_5_common_t *armv4_5 = target->arch_info; - armv4_5_algorithm_t *armv4_5_algorithm_info = arch_info; + struct armv4_5_common_s *armv4_5 = target_to_armv4_5(target); + struct armv4_5_algorithm *armv4_5_algorithm_info = arch_info; enum armv4_5_state core_state = armv4_5->core_state; enum armv4_5_mode core_mode = armv4_5->core_mode; - u32 context[17]; - u32 cpsr; + uint32_t context[17]; + uint32_t cpsr; int exit_breakpoint_size = 0; int i; int retval = ERROR_OK; - + LOG_DEBUG("Running algorithm"); + if (armv4_5_algorithm_info->common_magic != ARMV4_5_COMMON_MAGIC) { - ERROR("current target isn't an ARMV4/5 target"); + LOG_ERROR("current target isn't an ARMV4/5 target"); return ERROR_TARGET_INVALID; } - + if (target->state != TARGET_HALTED) { - WARNING("target not halted"); + LOG_WARNING("target not halted"); return ERROR_TARGET_NOT_HALTED; } - + + if (armv4_5_mode_to_number(armv4_5->core_mode)==-1) + return ERROR_FAIL; + + /* armv5 and later can terminate with BKPT instruction; less overhead */ + if (!exit_point && armv4_5->is_armv4) + { + LOG_ERROR("ARMv4 target needs HW breakpoint location"); + return ERROR_FAIL; + } + for (i = 0; i <= 16; i++) { if (!ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_algorithm_info->core_mode, i).valid) @@ -523,30 +645,36 @@ int armv4_5_run_algorithm(struct target_s *target, int num_mem_params, mem_param context[i] = buf_get_u32(ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_algorithm_info->core_mode, i).value, 0, 32); } cpsr = buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 32); - + for (i = 0; i < num_mem_params; i++) { - target_write_buffer(target, mem_params[i].address, mem_params[i].size, mem_params[i].value); + if ((retval = target_write_buffer(target, mem_params[i].address, mem_params[i].size, mem_params[i].value)) != ERROR_OK) + { + return retval; + } } - + for (i = 0; i < num_reg_params; i++) { - reg_t *reg = register_get_by_name(armv4_5->core_cache, reg_params[i].reg_name, 0); + struct reg *reg = register_get_by_name(armv4_5->core_cache, reg_params[i].reg_name, 0); if (!reg) { - ERROR("BUG: register '%s' not found", reg_params[i].reg_name); - exit(-1); + LOG_ERROR("BUG: register '%s' not found", reg_params[i].reg_name); + return ERROR_INVALID_ARGUMENTS; } - + if (reg->size != reg_params[i].size) { - ERROR("BUG: register '%s' size doesn't match reg_params[i].size", reg_params[i].reg_name); - exit(-1); + LOG_ERROR("BUG: register '%s' size doesn't match reg_params[i].size", reg_params[i].reg_name); + return ERROR_INVALID_ARGUMENTS; + } + + if ((retval = armv4_5_set_core_reg(reg, reg_params[i].value)) != ERROR_OK) + { + return retval; } - - armv4_5_set_core_reg(reg, reg_params[i].value); } - + armv4_5->core_state = armv4_5_algorithm_info->core_state; if (armv4_5->core_state == ARMV4_5_STATE_ARM) exit_breakpoint_size = 4; @@ -554,104 +682,276 @@ int armv4_5_run_algorithm(struct target_s *target, int num_mem_params, mem_param exit_breakpoint_size = 2; else { - ERROR("BUG: can't execute algorithms when not in ARM or Thumb state"); - exit(-1); + LOG_ERROR("BUG: can't execute algorithms when not in ARM or Thumb state"); + return ERROR_INVALID_ARGUMENTS; } - + if (armv4_5_algorithm_info->core_mode != ARMV4_5_MODE_ANY) { - DEBUG("setting core_mode: 0x%2.2x", armv4_5_algorithm_info->core_mode); + LOG_DEBUG("setting core_mode: 0x%2.2x", armv4_5_algorithm_info->core_mode); buf_set_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 5, armv4_5_algorithm_info->core_mode); armv4_5->core_cache->reg_list[ARMV4_5_CPSR].dirty = 1; armv4_5->core_cache->reg_list[ARMV4_5_CPSR].valid = 1; } - if ((retval = breakpoint_add(target, exit_point, exit_breakpoint_size, BKPT_HARD)) != ERROR_OK) + /* terminate using a hardware or (ARMv5+) software breakpoint */ + if (exit_point && (retval = breakpoint_add(target, exit_point, + exit_breakpoint_size, BKPT_HARD)) != ERROR_OK) { - ERROR("can't add breakpoint to finish algorithm execution"); + LOG_ERROR("can't add HW breakpoint to terminate algorithm"); return ERROR_TARGET_FAILURE; } - - target->type->resume(target, 0, entry_point, 1, 1); - target->type->poll(target); - - while (target->state != TARGET_HALTED) + + if ((retval = target_resume(target, 0, entry_point, 1, 1)) != ERROR_OK) { - usleep(10000); - target->type->poll(target); - if ((timeout_ms -= 10) <= 0) - { - ERROR("timeout waiting for algorithm to complete, trying to halt target"); - target->type->halt(target); - timeout_ms = 1000; - while (target->state != TARGET_HALTED) - { - usleep(10000); - target->type->poll(target); - if ((timeout_ms -= 10) <= 0) - { - ERROR("target didn't reenter debug state, exiting"); - exit(-1); - } - } - retval = ERROR_TARGET_TIMEOUT; - } + return retval; } - - breakpoint_remove(target, exit_point); - + int retvaltemp; + retval = run_it(target, exit_point, timeout_ms, arch_info); + + if (exit_point) + breakpoint_remove(target, exit_point); + + if (retval != ERROR_OK) + return retval; + for (i = 0; i < num_mem_params; i++) { if (mem_params[i].direction != PARAM_OUT) - target_read_buffer(target, mem_params[i].address, mem_params[i].size, mem_params[i].value); + if ((retvaltemp = target_read_buffer(target, mem_params[i].address, mem_params[i].size, mem_params[i].value)) != ERROR_OK) + { + retval = retvaltemp; + } } - + for (i = 0; i < num_reg_params; i++) { if (reg_params[i].direction != PARAM_OUT) { - - reg_t *reg = register_get_by_name(armv4_5->core_cache, reg_params[i].reg_name, 0); + + struct reg *reg = register_get_by_name(armv4_5->core_cache, reg_params[i].reg_name, 0); if (!reg) { - ERROR("BUG: register '%s' not found", reg_params[i].reg_name); - exit(-1); + LOG_ERROR("BUG: register '%s' not found", reg_params[i].reg_name); + retval = ERROR_INVALID_ARGUMENTS; + continue; } - + if (reg->size != reg_params[i].size) { - ERROR("BUG: register '%s' size doesn't match reg_params[i].size", reg_params[i].reg_name); - exit(-1); + LOG_ERROR("BUG: register '%s' size doesn't match reg_params[i].size", reg_params[i].reg_name); + retval = ERROR_INVALID_ARGUMENTS; + continue; } - + buf_set_u32(reg_params[i].value, 0, 32, buf_get_u32(reg->value, 0, 32)); } } - + for (i = 0; i <= 16; i++) { - DEBUG("restoring register %s with value 0x%8.8x", ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_algorithm_info->core_mode, i).name, context[i]); - buf_set_u32(ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_algorithm_info->core_mode, i).value, 0, 32, context[i]); - ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_algorithm_info->core_mode, i).valid = 1; - ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_algorithm_info->core_mode, i).dirty = 1; + uint32_t regvalue; + regvalue = buf_get_u32(ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_algorithm_info->core_mode, i).value, 0, 32); + if (regvalue != context[i]) + { + LOG_DEBUG("restoring register %s with value 0x%8.8" PRIx32 "", ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_algorithm_info->core_mode, i).name, context[i]); + buf_set_u32(ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_algorithm_info->core_mode, i).value, 0, 32, context[i]); + ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_algorithm_info->core_mode, i).valid = 1; + ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_algorithm_info->core_mode, i).dirty = 1; + } } buf_set_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 32, cpsr); armv4_5->core_cache->reg_list[ARMV4_5_CPSR].valid = 1; armv4_5->core_cache->reg_list[ARMV4_5_CPSR].dirty = 1; - + armv4_5->core_state = core_state; armv4_5->core_mode = core_mode; return retval; } -int armv4_5_init_arch_info(target_t *target, armv4_5_common_t *armv4_5) -{ +int armv4_5_run_algorithm(struct target *target, int num_mem_params, struct mem_param *mem_params, int num_reg_params, struct reg_param *reg_params, uint32_t entry_point, uint32_t exit_point, int timeout_ms, void *arch_info) +{ + return armv4_5_run_algorithm_inner(target, num_mem_params, mem_params, num_reg_params, reg_params, entry_point, exit_point, timeout_ms, arch_info, armv4_5_run_algorithm_completion); +} + +/** + * Runs ARM code in the target to calculate a CRC32 checksum. + * + * \todo On ARMv5+, rely on BKPT termination for reduced overhead. + */ +int arm_checksum_memory(struct target *target, + uint32_t address, uint32_t count, uint32_t *checksum) +{ + struct working_area *crc_algorithm; + struct armv4_5_algorithm armv4_5_info; + struct reg_param reg_params[2]; + int retval; + uint32_t i; + + static const uint32_t arm_crc_code[] = { + 0xE1A02000, /* mov r2, r0 */ + 0xE3E00000, /* mov r0, #0xffffffff */ + 0xE1A03001, /* mov r3, r1 */ + 0xE3A04000, /* mov r4, #0 */ + 0xEA00000B, /* b ncomp */ + /* nbyte: */ + 0xE7D21004, /* ldrb r1, [r2, r4] */ + 0xE59F7030, /* ldr r7, CRC32XOR */ + 0xE0200C01, /* eor r0, r0, r1, asl 24 */ + 0xE3A05000, /* mov r5, #0 */ + /* loop: */ + 0xE3500000, /* cmp r0, #0 */ + 0xE1A06080, /* mov r6, r0, asl #1 */ + 0xE2855001, /* add r5, r5, #1 */ + 0xE1A00006, /* mov r0, r6 */ + 0xB0260007, /* eorlt r0, r6, r7 */ + 0xE3550008, /* cmp r5, #8 */ + 0x1AFFFFF8, /* bne loop */ + 0xE2844001, /* add r4, r4, #1 */ + /* ncomp: */ + 0xE1540003, /* cmp r4, r3 */ + 0x1AFFFFF1, /* bne nbyte */ + /* end: */ + 0xEAFFFFFE, /* b end */ + /* CRC32XOR: */ + 0x04C11DB7 /* .word 0x04C11DB7 */ + }; + + retval = target_alloc_working_area(target, + sizeof(arm_crc_code), &crc_algorithm); + if (retval != ERROR_OK) + return retval; + + /* convert code into a buffer in target endianness */ + for (i = 0; i < ARRAY_SIZE(arm_crc_code); i++) { + retval = target_write_u32(target, + crc_algorithm->address + i * sizeof(uint32_t), + arm_crc_code[i]); + if (retval != ERROR_OK) + return retval; + } + + armv4_5_info.common_magic = ARMV4_5_COMMON_MAGIC; + armv4_5_info.core_mode = ARMV4_5_MODE_SVC; + armv4_5_info.core_state = ARMV4_5_STATE_ARM; + + init_reg_param(®_params[0], "r0", 32, PARAM_IN_OUT); + init_reg_param(®_params[1], "r1", 32, PARAM_OUT); + + buf_set_u32(reg_params[0].value, 0, 32, address); + buf_set_u32(reg_params[1].value, 0, 32, count); + + /* 20 second timeout/megabyte */ + int timeout = 20000 * (1 + (count / (1024 * 1024))); + + retval = target_run_algorithm(target, 0, NULL, 2, reg_params, + crc_algorithm->address, + crc_algorithm->address + sizeof(arm_crc_code) - 8, + timeout, &armv4_5_info); + if (retval != ERROR_OK) { + LOG_ERROR("error executing ARM crc algorithm"); + destroy_reg_param(®_params[0]); + destroy_reg_param(®_params[1]); + target_free_working_area(target, crc_algorithm); + return retval; + } + + *checksum = buf_get_u32(reg_params[0].value, 0, 32); + + destroy_reg_param(®_params[0]); + destroy_reg_param(®_params[1]); + + target_free_working_area(target, crc_algorithm); + + return ERROR_OK; +} + +/** + * Runs ARM code in the target to check whether a memory block holds + * all ones. NOR flash which has been erased, and thus may be written, + * holds all ones. + * + * \todo On ARMv5+, rely on BKPT termination for reduced overhead. + */ +int arm_blank_check_memory(struct target *target, + uint32_t address, uint32_t count, uint32_t *blank) +{ + struct working_area *check_algorithm; + struct reg_param reg_params[3]; + struct armv4_5_algorithm armv4_5_info; + int retval; + uint32_t i; + + static const uint32_t check_code[] = { + /* loop: */ + 0xe4d03001, /* ldrb r3, [r0], #1 */ + 0xe0022003, /* and r2, r2, r3 */ + 0xe2511001, /* subs r1, r1, #1 */ + 0x1afffffb, /* bne loop */ + /* end: */ + 0xeafffffe /* b end */ + }; + + /* make sure we have a working area */ + retval = target_alloc_working_area(target, + sizeof(check_code), &check_algorithm); + if (retval != ERROR_OK) + return retval; + + /* convert code into a buffer in target endianness */ + for (i = 0; i < ARRAY_SIZE(check_code); i++) { + retval = target_write_u32(target, + check_algorithm->address + + i * sizeof(uint32_t), + check_code[i]); + if (retval != ERROR_OK) + return retval; + } + + armv4_5_info.common_magic = ARMV4_5_COMMON_MAGIC; + armv4_5_info.core_mode = ARMV4_5_MODE_SVC; + armv4_5_info.core_state = ARMV4_5_STATE_ARM; + + init_reg_param(®_params[0], "r0", 32, PARAM_OUT); + buf_set_u32(reg_params[0].value, 0, 32, address); + + init_reg_param(®_params[1], "r1", 32, PARAM_OUT); + buf_set_u32(reg_params[1].value, 0, 32, count); + + init_reg_param(®_params[2], "r2", 32, PARAM_IN_OUT); + buf_set_u32(reg_params[2].value, 0, 32, 0xff); + + retval = target_run_algorithm(target, 0, NULL, 3, reg_params, + check_algorithm->address, + check_algorithm->address + sizeof(check_code) - 4, + 10000, &armv4_5_info); + if (retval != ERROR_OK) { + destroy_reg_param(®_params[0]); + destroy_reg_param(®_params[1]); + destroy_reg_param(®_params[2]); + target_free_working_area(target, check_algorithm); + return retval; + } + + *blank = buf_get_u32(reg_params[2].value, 0, 32); + + destroy_reg_param(®_params[0]); + destroy_reg_param(®_params[1]); + destroy_reg_param(®_params[2]); + + target_free_working_area(target, check_algorithm); + + return ERROR_OK; +} + +int armv4_5_init_arch_info(struct target *target, struct arm *armv4_5) +{ target->arch_info = armv4_5; armv4_5->common_magic = ARMV4_5_COMMON_MAGIC; armv4_5->core_state = ARMV4_5_STATE_ARM; armv4_5->core_mode = ARMV4_5_MODE_USR; - + return ERROR_OK; }