From: oharboe Date: Sun, 2 Nov 2008 21:21:01 +0000 (+0000) Subject: more error handling and removed force breakpoints as that is handled by a more generi... X-Git-Tag: v0.1.0~192 X-Git-Url: https://git.sur5r.net/?a=commitdiff_plain;h=9f58ef3a581ff850b1c9c248e7dc30f472fc4df1;p=openocd more error handling and removed force breakpoints as that is handled by a more generic gdb command git-svn-id: svn://svn.berlios.de/openocd/trunk@1125 b42882b7-edfa-0310-969c-e2dbd0fdcd60 --- diff --git a/src/target/xscale.c b/src/target/xscale.c index 9cf43891..0290c9ec 100644 --- a/src/target/xscale.c +++ b/src/target/xscale.c @@ -1260,6 +1260,7 @@ int xscale_enable_single_step(struct target_s *target, u32 next_pc) armv4_5_common_t *armv4_5 = target->arch_info; xscale_common_t *xscale= armv4_5->arch_info; reg_t *ibcr0 = &xscale->reg_cache->reg_list[XSCALE_IBCR0]; + int retval; if (xscale->ibcr0_used) { @@ -1276,7 +1277,8 @@ int xscale_enable_single_step(struct target_s *target, u32 next_pc) } } - xscale_set_reg_u32(ibcr0, next_pc | 0x1); + if ((retval=xscale_set_reg_u32(ibcr0, next_pc | 0x1))!=ERROR_OK) + return retval; return ERROR_OK; } @@ -1286,8 +1288,10 @@ int xscale_disable_single_step(struct target_s *target) armv4_5_common_t *armv4_5 = target->arch_info; xscale_common_t *xscale= armv4_5->arch_info; reg_t *ibcr0 = &xscale->reg_cache->reg_list[XSCALE_IBCR0]; + int retval; - xscale_set_reg_u32(ibcr0, 0x0); + if ((retval=xscale_set_reg_u32(ibcr0, 0x0))!=ERROR_OK) + return retval; return ERROR_OK; } @@ -1448,46 +1452,15 @@ int xscale_resume(struct target_s *target, int current, u32 address, int handle_ return ERROR_OK; } -int xscale_step(struct target_s *target, int current, u32 address, int handle_breakpoints) +static int xscale_step_inner(struct target_s *target, int current, u32 address, int handle_breakpoints) { armv4_5_common_t *armv4_5 = target->arch_info; xscale_common_t *xscale = armv4_5->arch_info; - breakpoint_t *breakpoint = target->breakpoints; u32 current_pc, next_pc; - int i; int retval; + int i; - if (target->state != TARGET_HALTED) - { - LOG_WARNING("target not halted"); - return ERROR_TARGET_NOT_HALTED; - } - - /* current = 1: continue on current pc, otherwise continue at
*/ - if (!current) - buf_set_u32(armv4_5->core_cache->reg_list[15].value, 0, 32, address); - - current_pc = buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32); - - /* if we're at the reset vector, we have to simulate the step */ - if (current_pc == 0x0) - { - arm_simulate_step(target, NULL); - current_pc = buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32); - - target->debug_reason = DBG_REASON_SINGLESTEP; - target_call_event_callbacks(target, TARGET_EVENT_HALTED); - - return ERROR_OK; - } - - /* 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)))) - { - xscale_unset_breakpoint(target, breakpoint); - } target->debug_reason = DBG_REASON_SINGLESTEP; @@ -1497,52 +1470,110 @@ int xscale_step(struct target_s *target, int current, u32 address, int handle_br 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"); - xscale_enable_single_step(target, next_pc); + if ((retval=xscale_enable_single_step(target, next_pc))!=ERROR_OK) + return retval; /* restore banked registers */ - xscale_restore_context(target); + if ((retval=xscale_restore_context(target))!=ERROR_OK) + return retval; /* send resume request (command 0x30 or 0x31) * clean the trace buffer if it is to be enabled (0x62) */ if (xscale->trace.buffer_enabled) { - xscale_send_u32(target, 0x62); - xscale_send_u32(target, 0x31); + if ((retval=xscale_send_u32(target, 0x62))!=ERROR_OK) + return retval; + if ((retval=xscale_send_u32(target, 0x31))!=ERROR_OK) + return retval; } else - xscale_send_u32(target, 0x30); + if ((retval=xscale_send_u32(target, 0x30))!=ERROR_OK) + return retval; /* send CPSR */ - xscale_send_u32(target, buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 32)); + if ((retval=xscale_send_u32(target, buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 32)))!=ERROR_OK) + return retval; LOG_DEBUG("writing cpsr with value 0x%8.8x", buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 32)); for (i = 7; i >= 0; i--) { /* send register */ - xscale_send_u32(target, buf_get_u32(armv4_5->core_cache->reg_list[i].value, 0, 32)); + if ((retval=xscale_send_u32(target, buf_get_u32(armv4_5->core_cache->reg_list[i].value, 0, 32)))!=ERROR_OK) + return retval; LOG_DEBUG("writing r%i with value 0x%8.8x", i, buf_get_u32(armv4_5->core_cache->reg_list[i].value, 0, 32)); } /* send PC */ - xscale_send_u32(target, buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32)); + if ((retval=xscale_send_u32(target, buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32)))!=ERROR_OK) + return retval; LOG_DEBUG("writing PC with value 0x%8.8x", buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32)); target_call_event_callbacks(target, TARGET_EVENT_RESUMED); /* registers are now invalid */ - armv4_5_invalidate_core_regs(target); + if ((retval=armv4_5_invalidate_core_regs(target))!=ERROR_OK) + return retval; /* wait for and process debug entry */ - xscale_debug_entry(target); + if ((retval=xscale_debug_entry(target))!=ERROR_OK) + return retval; LOG_DEBUG("disable single-step"); - xscale_disable_single_step(target); + if ((retval=xscale_disable_single_step(target))!=ERROR_OK) + return retval; target_call_event_callbacks(target, TARGET_EVENT_HALTED); + return ERROR_OK; +} + +int xscale_step(struct target_s *target, int current, u32 address, int handle_breakpoints) +{ + armv4_5_common_t *armv4_5 = target->arch_info; + breakpoint_t *breakpoint = target->breakpoints; + + u32 current_pc; + int retval; + + if (target->state != TARGET_HALTED) + { + LOG_WARNING("target not halted"); + return ERROR_TARGET_NOT_HALTED; + } + + /* current = 1: continue on current pc, otherwise continue at
*/ + if (!current) + buf_set_u32(armv4_5->core_cache->reg_list[15].value, 0, 32, address); + + current_pc = buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32); + + /* if we're at the reset vector, we have to simulate the step */ + if (current_pc == 0x0) + { + if ((retval=arm_simulate_step(target, NULL))!=ERROR_OK) + return retval; + current_pc = buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32); + + target->debug_reason = DBG_REASON_SINGLESTEP; + target_call_event_callbacks(target, TARGET_EVENT_HALTED); + + return ERROR_OK; + } + + /* 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)))) + { + if ((retval=xscale_unset_breakpoint(target, breakpoint))!=ERROR_OK) + return retval; + } + + retval = xscale_step_inner(target, current, address, handle_breakpoints); + if (breakpoint) { xscale_set_breakpoint(target, breakpoint); @@ -2152,9 +2183,6 @@ int xscale_set_breakpoint(struct target_s *target, breakpoint_t *breakpoint) return ERROR_TARGET_NOT_HALTED; } - if (xscale->force_hw_bkpts) - breakpoint->type = BKPT_HARD; - if (breakpoint->set) { LOG_WARNING("breakpoint already set"); @@ -2228,12 +2256,6 @@ int xscale_add_breakpoint(struct target_s *target, breakpoint_t *breakpoint) return ERROR_TARGET_NOT_HALTED; } - if (xscale->force_hw_bkpts) - { - LOG_DEBUG("forcing use of hardware breakpoint at address 0x%8.8x", breakpoint->address); - breakpoint->type = BKPT_HARD; - } - if ((breakpoint->type == BKPT_HARD) && (xscale->ibcr_available < 1)) { LOG_INFO("no breakpoint unit available for hardware breakpoint"); @@ -3090,8 +3112,6 @@ int xscale_init_arch_info(target_t *target, xscale_common_t *xscale, int chain_p xscale->hold_rst = 0; xscale->external_debug_break = 0; - xscale->force_hw_bkpts = 1; - xscale->ibcr_available = 2; xscale->ibcr0_used = 0; xscale->ibcr1_used = 0; @@ -3391,34 +3411,6 @@ int xscale_handle_vector_catch_command(command_context_t *cmd_ctx, char *cmd, ch return ERROR_OK; } -int xscale_handle_force_hw_bkpts_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc) -{ - target_t *target = get_current_target(cmd_ctx); - armv4_5_common_t *armv4_5; - xscale_common_t *xscale; - - if (xscale_get_arch_pointers(target, &armv4_5, &xscale) != ERROR_OK) - { - return ERROR_OK; - } - - if ((argc >= 1) && (strcmp("enable", args[0]) == 0)) - { - xscale->force_hw_bkpts = 1; - } - else if ((argc >= 1) && (strcmp("disable", args[0]) == 0)) - { - xscale->force_hw_bkpts = 0; - } - else - { - command_print(cmd_ctx, "usage: xscale force_hw_bkpts "); - } - - command_print(cmd_ctx, "force hardware breakpoints %s", (xscale->force_hw_bkpts) ? "enabled" : "disabled"); - - return ERROR_OK; -} int xscale_handle_trace_buffer_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc) { @@ -3629,12 +3621,12 @@ int xscale_handle_cp15(command_context_t *cmd_ctx, char *cmd, char **args, int a target_t *target = get_current_target(cmd_ctx); armv4_5_common_t *armv4_5; xscale_common_t *xscale; - + if (xscale_get_arch_pointers(target, &armv4_5, &xscale) != ERROR_OK) { return ERROR_OK; } - + if (target->state != TARGET_HALTED) { command_print(cmd_ctx, "target must be stopped for \"%s\" command", cmd); diff --git a/src/target/xscale.h b/src/target/xscale.h index c9a6ea20..e3bfcec6 100644 --- a/src/target/xscale.h +++ b/src/target/xscale.h @@ -121,7 +121,6 @@ typedef struct xscale_common_s int external_debug_break; /* breakpoint / watchpoint handling */ - int force_hw_bkpts; int dbr_available; int dbr0_used; int dbr1_used;