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target/xtensa: extra debug info for "xtensa exe" failures

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- Read and display EXCCAUSE on exe error
- Clean up error messages
- Clarify "xtensa exe" documentation

Signed-off-by: ianst <ianst@cadence.com>
Change-Id: I90ed39f6afb6543c0c873301501435384b4dccbe
Reviewed-on: https://review.openocd.org/c/openocd/+/7982
Tested-by: jenkins
Reviewed-by: Antonio Borneo <borneo.antonio@gmail.com>
This commit is contained in:
ianst
2023-12-06 14:34:09 -08:00
committed by Antonio Borneo
parent 22ebb693b6
commit 04eda37263
2 changed files with 17 additions and 10 deletions
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18
src/target/xtensa/xtensa.c
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@@ -3483,15 +3483,21 @@ static COMMAND_HELPER(xtensa_cmd_exe_do, struct target *target)
LOG_TARGET_DEBUG(target, "execute stub: %s", CMD_ARGV[0]);
xtensa_queue_exec_ins_wide(xtensa, ops, oplen); /* Handles endian-swap */
status = xtensa_dm_queue_execute(&xtensa->dbg_mod);
if (status != ERROR_OK)
LOG_TARGET_ERROR(target, "TIE queue execute: %d\n", status);
status = xtensa_core_status_check(target);
if (status != ERROR_OK)
LOG_TARGET_ERROR(target, "TIE instr execute: %d\n", status);
if (status != ERROR_OK) {
LOG_TARGET_ERROR(target, "exec: queue error %d", status);
} else {
status = xtensa_core_status_check(target);
if (status != ERROR_OK)
LOG_TARGET_ERROR(target, "exec: status error %d", status);
}
/* Reread register cache and restore saved regs after instruction execution */
if (xtensa_fetch_all_regs(target) != ERROR_OK)
LOG_TARGET_ERROR(target, "%s: Failed to fetch register cache (post-exec).", target_name(target));
LOG_TARGET_ERROR(target, "post-exec: register fetch error");
if (status != ERROR_OK) {
LOG_TARGET_ERROR(target, "post-exec: EXCCAUSE 0x%02" PRIx32,
xtensa_reg_get(target, XT_REG_IDX_EXCCAUSE));
}
xtensa_reg_set(target, XT_REG_IDX_EXCCAUSE, exccause);
xtensa_reg_set(target, XT_REG_IDX_CPENABLE, cpenable);
return status;