diff options
Diffstat (limited to 'src/svc.c')
| -rw-r--r-- | src/svc.c | 58 |
1 files changed, 0 insertions, 58 deletions
diff --git a/src/svc.c b/src/svc.c deleted file mode 100644 index f132571..0000000 --- a/src/svc.c +++ /dev/null @@ -1,58 +0,0 @@ -/** - * @file svc.c - * An unused handler for SVC calls - * TODO: use SVC calls, possibly allowing for switch to unprivileged mode? - * - * Copyright (C) 2018 Clyne Sullivan - * - * This program is free software: you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation, either version 3 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program. If not, see <https://www.gnu.org/licenses/>. - */ - -#include <stdint.h> -#include <gpio.h> -#include <clock.h> -#include <task.h> - -extern void gpio_svc(uint32_t *); - -void svc_handler(uint32_t *args) -{ - /*uint32_t*/int svc_number = ((char *)args[6])[-2]; - - switch (svc_number) { - case -1: - case 0: - _exit(args[0]); - break; - case 1: - gpio_svc(args); - break; - default: - break; - } -} - -void SVC_Handler(void) { - uint32_t *args; - - asm("\ - tst lr, #4; \ - ite eq; \ - mrseq %0, msp; \ - mrsne %0, psp; \ - " : "=r" (args)); - - svc_handler(args); -} - |