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Added functionality to the SYS_SYSTEM semihosting call.

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There seems to be a few missing semihosting calls.  I
am not sure why this one is actually missing, since it
seems simple enough to implement.  It was tested using
an HTC HD7 connected to openocd through a "home brew"
ftdi 4232H board.

Change-Id: Ie17dc96c6d48227a3dc9ff1e21201a85498a10b1
Signed-off-by: Brandon Warhurst <roboknight@gmail.com>
Reviewed-on: http://openocd.zylin.com/1345
Tested-by: jenkins
Reviewed-by: Spencer Oliver <spen@spen-soft.co.uk>
This commit is contained in:
Brandon Warhurst 2013-04-18 14:05:26 -04:00 committed by Spencer Oliver
parent a07a3d2d44
commit 232af6cc9b
1 changed files with 26 additions and 1 deletions
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27
src/target/arm_semihosting.c
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@ -374,9 +374,34 @@ static int do_semihosting(struct target *target)
}
return target_call_event_callbacks(target, TARGET_EVENT_HALTED);
case 0x12: /* SYS_SYSTEM */
/* Provide SYS_SYSTEM functionality. Uses the
* libc system command, there may be a reason *NOT*
* to use this, but as I can't think of one, I
* implemented it this way.
*/
retval = target_read_memory(target, r1, 4, 2, params);
if (retval != ERROR_OK)
return retval;
else {
uint32_t len = target_buffer_get_u32(target, params+4);
uint32_t c_ptr = target_buffer_get_u32(target, params);
uint8_t cmd[256];
if (len > 255) {
result = -1;
arm->semihosting_errno = EINVAL;
} else {
memset(cmd, 0x0, 256);
retval = target_read_memory(target, c_ptr, 1, len, cmd);
if (retval != ERROR_OK)
return retval;
else
result = system((const char *)cmd);
}
}
break;
case 0x0d: /* SYS_TMPNAM */
case 0x10: /* SYS_CLOCK */
case 0x12: /* SYS_SYSTEM */
case 0x17: /* angel_SWIreason_EnterSVC */
case 0x30: /* SYS_ELAPSED */
case 0x31: /* SYS_TICKFREQ */