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use Supexec() instead of Super() to retrieve driver interface in

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supervisor mode
This commit is contained in:
Markus Fröschle
2015-10-13 06:00:23 +00:00
parent 87bf20c6bd
commit 6445903e1b
1 changed files with 10 additions and 8 deletions
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18
tos/bascook/sources/bascook.c
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@@ -28,7 +28,7 @@ struct driver_table *get_bas_drivers(void)
* exposure call. * exposure call.
* If we get here, we have a BaS version that doesn't support the trap 0 interface * If we get here, we have a BaS version that doesn't support the trap 0 interface
*/ */
static void __attribute__((interrupt)) my_own_trap0_handler(void) static void __attribute__((interrupt)) trap0_catcher(void)
{ {
__asm__ __volatile__( __asm__ __volatile__(
" clr.l d0 \n\t" // return 0 to indicate not supported " clr.l d0 \n\t" // return 0 to indicate not supported
@@ -104,17 +104,13 @@ static char *dt_to_str(enum driver_type dt)
} }
} }
int main(int argc, char *argv[]) static void set_driver_cookies(void)
{ {
struct driver_table *dt; struct driver_table *dt;
void *ssp;
void *old_vector; void *old_vector;
char **sysbase = (char **) 0x4f2; char **sysbase = (char **) 0x4f2;
uint32_t sig; uint32_t sig;
(void) Cconws("retrieve BaS driver interface\r\n");
ssp = (void *) Super(0L); /* go to supervisor mode, we are doing dirty tricks */
sig = * (long *)((*sysbase) + 0x2c); sig = * (long *)((*sysbase) + 0x2c);
/* /*
@@ -122,7 +118,7 @@ int main(int argc, char *argv[])
*/ */
if (sig == 0x45544f53) if (sig == 0x45544f53)
{ {
old_vector = Setexc(0x20, my_own_trap0_handler); /* set our own temporarily */ old_vector = Setexc(0x20, trap0_catcher); /* set our own temporarily */
dt = get_bas_drivers(); /* trap #0 */ dt = get_bas_drivers(); /* trap #0 */
(void) Setexc(0x20, old_vector); /* restore original vector */ (void) Setexc(0x20, old_vector); /* restore original vector */
@@ -164,7 +160,13 @@ int main(int argc, char *argv[])
printf("not running on EmuTOS,\r\n(signature 0x%04x instead of 0x%04x\r\n", printf("not running on EmuTOS,\r\n(signature 0x%04x instead of 0x%04x\r\n",
(uint32_t) sig, 0x45544f53); (uint32_t) sig, 0x45544f53);
} }
Super(ssp); }
int main(int argc, char *argv[])
{
(void) Cconws("retrieve BaS driver interface\r\n");
Supexec(set_driver_cookies);
while (Cconis()) Cconin(); /* eat keys */ while (Cconis()) Cconin(); /* eat keys */