From ea361c3b7b0caa19013c1d3b6fa00b56b32040ed Mon Sep 17 00:00:00 2001 From: oharboe Date: Mon, 27 Oct 2008 11:36:03 +0000 Subject: Hongtao Zheng - add simulation because previous functions could not halt for instructions that next pc equal to the current pc. git-svn-id: svn://svn.berlios.de/openocd/trunk@1105 b42882b7-edfa-0310-969c-e2dbd0fdcd60 --- src/target/arm7_9_common.c | 78 ++++++++++++++++++++++++++++++++++++---------- src/target/arm7_9_common.h | 7 +++-- src/target/arm9tdmi.c | 7 +++-- 3 files changed, 72 insertions(+), 20 deletions(-) (limited to 'src') diff --git a/src/target/arm7_9_common.c b/src/target/arm7_9_common.c index a9f06df0..62045898 100644 --- a/src/target/arm7_9_common.c +++ b/src/target/arm7_9_common.c @@ -8,6 +8,9 @@ * Copyright (C) 2008 by Spencer Oliver * * spen@spen-soft.co.uk * * * + * Copyright (C) 2008 by Hongtao Zheng * + * hontor@126.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 * @@ -39,6 +42,7 @@ #include "arm7_9_common.h" #include "breakpoints.h" #include "time_support.h" +#include "arm_simulator.h" #include #include @@ -1549,6 +1553,9 @@ int arm7_9_resume(struct target_s *target, int current, u32 address, int handle_ if (!current) buf_set_u32(armv4_5->core_cache->reg_list[15].value, 0, 32, address); + u32 current_pc; + current_pc = buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32); + /* the front-end may request us not to handle breakpoints */ if (handle_breakpoints) { @@ -1560,8 +1567,17 @@ int arm7_9_resume(struct target_s *target, int current, u32 address, int handle_ return retval; } + u32 next_pc; + if ((retval = arm_simulate_step(target, &next_pc)) != ERROR_OK) + { + u32 current_opcode; + target_read_u32(target, current_pc, ¤t_opcode); + LOG_ERROR("BUG: couldn't calculate PC of next instruction, current opcode was 0x%8.8x", current_opcode); + return retval; + } + LOG_DEBUG("enable single-step"); - arm7_9->enable_single_step(target); + arm7_9->enable_single_step(target, next_pc); target->debug_reason = DBG_REASON_SINGLESTEP; @@ -1671,24 +1687,42 @@ int arm7_9_resume(struct target_s *target, int current, u32 address, int handle_ return ERROR_OK; } -void arm7_9_enable_eice_step(target_t *target) +void arm7_9_enable_eice_step(target_t *target, u32 next_pc) { armv4_5_common_t *armv4_5 = target->arch_info; arm7_9_common_t *arm7_9 = armv4_5->arch_info; - /* setup an inverse breakpoint on the current PC - * - comparator 1 matches the current address - * - rangeout from comparator 1 is connected to comparator 0 rangein - * - comparator 0 matches any address, as long as rangein is low */ - embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W0_ADDR_MASK], 0xffffffff); - embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W0_DATA_MASK], 0xffffffff); - embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_VALUE], EICE_W_CTRL_ENABLE); - embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_MASK], ~(EICE_W_CTRL_RANGE|EICE_W_CTRL_nOPC) & 0xff); - embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W1_ADDR_VALUE], buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32)); - embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W1_ADDR_MASK], 0); - embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W1_DATA_MASK], 0xffffffff); - embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W1_CONTROL_VALUE], 0x0); - embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W1_CONTROL_MASK], ~EICE_W_CTRL_nOPC & 0xff); + u32 current_pc; + current_pc = buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32); + + if(next_pc != current_pc) + { + /* setup an inverse breakpoint on the current PC + * - comparator 1 matches the current address + * - rangeout from comparator 1 is connected to comparator 0 rangein + * - comparator 0 matches any address, as long as rangein is low */ + embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W0_ADDR_MASK], 0xffffffff); + embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W0_DATA_MASK], 0xffffffff); + embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_VALUE], EICE_W_CTRL_ENABLE); + embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_MASK], ~(EICE_W_CTRL_RANGE|EICE_W_CTRL_nOPC) & 0xff); + embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W1_ADDR_VALUE], current_pc); + embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W1_ADDR_MASK], 0); + embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W1_DATA_MASK], 0xffffffff); + embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W1_CONTROL_VALUE], 0x0); + embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W1_CONTROL_MASK], ~EICE_W_CTRL_nOPC & 0xff); + } + else + { + embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W0_ADDR_MASK], 0xffffffff); + embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W0_DATA_MASK], 0xffffffff); + embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_VALUE], 0x0); + embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_MASK], 0xff); + embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W1_ADDR_VALUE], next_pc); + embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W1_ADDR_MASK], 0); + embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W1_DATA_MASK], 0xffffffff); + embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W1_CONTROL_VALUE], EICE_W_CTRL_ENABLE); + embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W1_CONTROL_MASK], ~EICE_W_CTRL_nOPC & 0xff); + } } void arm7_9_disable_eice_step(target_t *target) @@ -1724,6 +1758,9 @@ int arm7_9_step(struct target_s *target, int current, u32 address, int handle_br if (!current) buf_set_u32(armv4_5->core_cache->reg_list[15].value, 0, 32, address); + u32 current_pc; + current_pc = buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32); + /* the front-end may request us not to handle breakpoints */ if (handle_breakpoints) if ((breakpoint = breakpoint_find(target, buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32)))) @@ -1734,12 +1771,21 @@ int arm7_9_step(struct target_s *target, int current, u32 address, int handle_br target->debug_reason = DBG_REASON_SINGLESTEP; + u32 next_pc; + if ((retval = arm_simulate_step(target, &next_pc)) != ERROR_OK) + { + u32 current_opcode; + target_read_u32(target, current_pc, ¤t_opcode); + LOG_ERROR("BUG: couldn't calculate PC of next instruction, current opcode was 0x%8.8x", current_opcode); + return retval; + } + if ((retval = arm7_9_restore_context(target)) != ERROR_OK) { return retval; } - arm7_9->enable_single_step(target); + arm7_9->enable_single_step(target, next_pc); if (armv4_5->core_state == ARMV4_5_STATE_ARM) { diff --git a/src/target/arm7_9_common.h b/src/target/arm7_9_common.h index 73d8f59e..a975b5f3 100644 --- a/src/target/arm7_9_common.h +++ b/src/target/arm7_9_common.h @@ -8,6 +8,9 @@ * Copyright (C) 2008 by Spencer Oliver * * spen@spen-soft.co.uk * * * + * Copyright (C) 2008 by Hongtao Zheng * + * hontor@126.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 * @@ -93,7 +96,7 @@ typedef struct arm7_9_common_s void (*branch_resume)(target_t *target); void (*branch_resume_thumb)(target_t *target); - void (*enable_single_step)(target_t *target); + void (*enable_single_step)(target_t *target, u32 next_pc); void (*disable_single_step)(target_t *target); void (*set_special_dbgrq)(target_t *target); @@ -143,7 +146,7 @@ int arm7_9_remove_breakpoint(struct target_s *target, breakpoint_t *breakpoint); int arm7_9_add_watchpoint(struct target_s *target, watchpoint_t *watchpoint); int arm7_9_remove_watchpoint(struct target_s *target, watchpoint_t *watchpoint); -void arm7_9_enable_eice_step(target_t *target); +void arm7_9_enable_eice_step(target_t *target, u32 next_pc); void arm7_9_disable_eice_step(target_t *target); int arm7_9_execute_sys_speed(struct target_s *target); diff --git a/src/target/arm9tdmi.c b/src/target/arm9tdmi.c index 69e9b797..89842d50 100644 --- a/src/target/arm9tdmi.c +++ b/src/target/arm9tdmi.c @@ -5,6 +5,9 @@ * Copyright (C) 2008 by Spencer Oliver * * spen@spen-soft.co.uk * * * + * Copyright (C) 2008 by Hongtao Zheng * + * hontor@126.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 * @@ -841,7 +844,7 @@ void arm9tdmi_branch_resume_thumb(target_t *target) } -void arm9tdmi_enable_single_step(target_t *target) +void arm9tdmi_enable_single_step(target_t *target, u32 next_pc) { /* get pointers to arch-specific information */ armv4_5_common_t *armv4_5 = target->arch_info; @@ -854,7 +857,7 @@ void arm9tdmi_enable_single_step(target_t *target) } else { - arm7_9_enable_eice_step(target); + arm7_9_enable_eice_step(target, next_pc); } } -- cgit v1.2.3