matos/core/syscall.c

#include "syscall.h"
#include "keyboard.h"
#include "klibc.h"
#include "stdarg.h"
#include "thread.h"

int syscallExecute(int syscallId, const struct cpu_state *userCtx)
{

    int ret;

    switch (syscallId) {
        case SYSCALL_ID_EXIT: {
            uint status;
            ret = syscallGet1arg(userCtx, &status);
            if (ret != 0)
                break;
            threadExit();
            assert(0);
            break;
        }
        case SYSCALL_ID_YOLO:
            ret = printf("YOLO FROM USERSPACE\n");
            break;
        case SYSCALL_ID_PUTC: {
            unsigned int c;
            ret = syscallGet1arg(userCtx, &c);
            putc(c);
            break;
        }
        case SYSCALL_ID_READ:
            ret = keyboardRead();
            break;
        default:
            printf("Unknon syscall id %d\n", syscallId);
            ret = -ENOENT;
    }
    return ret;
}