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semihosting: improve semihosting opcode debug messages 

This patch introduces function semihosting_opcode_to_str() which
converts semihosting opcodes to strings. This function is then
used in debug messages to improve log analysis and troubleshooting.

Change-Id: Iffea49dae13d6a626ae0db40d379cba3c9ea5bd3
Signed-off-by: Marek Vrbka <marek.vrbka@codasip.com>
Reviewed-on: https://review.openocd.org/c/openocd/+/7726
Tested-by: jenkins
Reviewed-by: Antonio Borneo <borneo.antonio@gmail.com>
Reviewed-by: Jan Matyas <jan.matyas@codasip.com>
This commit is contained in:
Marek Vrbka 2023-05-30 15:36:12 +02:00 committed by Antonio Borneo
parent eebcf3cff1
commit 6ef75352f1
2 changed files with 75 additions and 4 deletions
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70
src/target/semihosting_common.c
View File

@ -294,6 +294,66 @@ static inline int semihosting_getchar(struct semihosting *semihosting, int fd)
*/
static char *semihosting_user_op_params;
const char *semihosting_opcode_to_str(const uint64_t opcode)
{
switch (opcode) {
case SEMIHOSTING_SYS_CLOSE:
return "CLOSE";
case SEMIHOSTING_SYS_CLOCK:
return "CLOCK";
case SEMIHOSTING_SYS_ELAPSED:
return "ELAPSED";
case SEMIHOSTING_SYS_ERRNO:
return "ERRNO";
case SEMIHOSTING_SYS_EXIT:
return "EXIT";
case SEMIHOSTING_SYS_EXIT_EXTENDED:
return "EXIT_EXTENDED";
case SEMIHOSTING_SYS_FLEN:
return "FLEN";
case SEMIHOSTING_SYS_GET_CMDLINE:
return "GET_CMDLINE";
case SEMIHOSTING_SYS_HEAPINFO:
return "HEAPINFO";
case SEMIHOSTING_SYS_ISERROR:
return "ISERROR";
case SEMIHOSTING_SYS_ISTTY:
return "ISTTY";
case SEMIHOSTING_SYS_OPEN:
return "OPEN";
case SEMIHOSTING_SYS_READ:
return "READ";
case SEMIHOSTING_SYS_READC:
return "READC";
case SEMIHOSTING_SYS_REMOVE:
return "REMOVE";
case SEMIHOSTING_SYS_RENAME:
return "RENAME";
case SEMIHOSTING_SYS_SEEK:
return "SEEK";
case SEMIHOSTING_SYS_SYSTEM:
return "SYSTEM";
case SEMIHOSTING_SYS_TICKFREQ:
return "TICKFREQ";
case SEMIHOSTING_SYS_TIME:
return "TIME";
case SEMIHOSTING_SYS_TMPNAM:
return "TMPNAM";
case SEMIHOSTING_SYS_WRITE:
return "WRITE";
case SEMIHOSTING_SYS_WRITEC:
return "WRITEC";
case SEMIHOSTING_SYS_WRITE0:
return "WRITE0";
case SEMIHOSTING_USER_CMD_0X100 ... SEMIHOSTING_USER_CMD_0X1FF:
return "USER_CMD";
case SEMIHOSTING_ARM_RESERVED_START ... SEMIHOSTING_ARM_RESERVED_END:
return "ARM_RESERVED_CMD";
default:
return "<unknown>";
}
}
/**
* Portable implementation of ARM semihosting calls.
* Performs the currently pending semihosting operation
@ -323,8 +383,9 @@ int semihosting_common(struct target *target)
/* Enough space to hold 4 long words. */
uint8_t fields[4*8];
LOG_DEBUG("op=0x%x, param=0x%" PRIx64, semihosting->op,
semihosting->param);
LOG_DEBUG("op=0x%x (%s), param=0x%" PRIx64, semihosting->op,
semihosting_opcode_to_str(semihosting->op),
semihosting->param);
switch (semihosting->op) {
@ -1470,8 +1531,9 @@ int semihosting_common(struct target *target)
retval = target_read_buffer(target, addr, len,
(uint8_t *)(semihosting_user_op_params));
if (retval != ERROR_OK) {
LOG_ERROR("Failed to read from target, semihosting op=0x%x",
semihosting->op);
LOG_ERROR("Failed to read from target, semihosting op=0x%x (%s)",
semihosting->op,
semihosting_opcode_to_str(semihosting->op));
free(semihosting_user_op_params);
semihosting_user_op_params = NULL;
return retval;

9
src/target/semihosting_common.h
View File

@ -65,6 +65,8 @@ enum semihosting_operation_numbers {
SEMIHOSTING_SYS_WRITE = 0x05,
SEMIHOSTING_SYS_WRITEC = 0x03,
SEMIHOSTING_SYS_WRITE0 = 0x04,
SEMIHOSTING_ARM_RESERVED_START = 0x32,
SEMIHOSTING_ARM_RESERVED_END = 0xFF,
SEMIHOSTING_USER_CMD_0X100 = 0x100, /* First user cmd op code */
SEMIHOSTING_USER_CMD_0X107 = 0x107, /* Last supported user cmd op code */
SEMIHOSTING_USER_CMD_0X1FF = 0x1FF, /* Last user cmd op code */
@ -186,6 +188,13 @@ struct semihosting {
int (*post_result)(struct target *target);
};
/**
* @brief Convert the syscall opcode to a human-readable string
* @param[in] opcode Syscall opcode
* @return String representation of syscall opcode
*/
const char *semihosting_opcode_to_str(uint64_t opcode);
int semihosting_common_init(struct target *target, void *setup,
void *post_result);
int semihosting_common(struct target *target);