64 lines
1.8 KiB
C
64 lines
1.8 KiB
C
#include "syscall.h"
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#include "keyboard.h"
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#include "klibc.h"
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#include "process.h"
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#include "stdarg.h"
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#include "thread.h"
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#include "types.h"
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#include "uaddrspace.h"
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int syscallExecute(int syscallId, const struct cpu_state *userCtx)
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{
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int ret = 0;
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switch (syscallId) {
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case SYSCALL_ID_EXIT: {
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uint status;
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ret = syscallGet1arg(userCtx, &status);
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if (ret != 0)
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break;
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threadExit();
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assert(0);
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break;
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}
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case SYSCALL_ID_YOLO:
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ret = printf("YOLO FROM USERSPACE\n");
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break;
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case SYSCALL_ID_PUTC: {
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unsigned int c;
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ret = syscallGet1arg(userCtx, &c);
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putc(c);
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break;
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}
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case SYSCALL_ID_READ:
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ret = keyboardRead();
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break;
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case SYSCALL_ID_TEST: {
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unsigned int arg1, arg2, arg3, arg4, arg5;
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ret = syscallGet5args(userCtx, &arg1, &arg2, &arg3, &arg4, &arg5);
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printf("Got 5args from userspace %d %d %d %d %d\n", arg1, arg2, arg3, arg4, arg5);
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break;
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}
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case SYSCALL_ID_BRK:{
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struct uAddrSpace *as;
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uaddr_t newHeapTop;
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as = processGetAddrSpace(getCurrentThread()->process);
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ret = syscallGet1arg(userCtx, (unsigned int *)&newHeapTop);
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if (ret != 0)
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break;
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threadChangeCurrentContext(uAddrSpaceGetMMUContext(as));
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//TODO : what if *newHeapTop raise page fault?
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ret = sysBrk(as, newHeapTop);
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threadChangeCurrentContext(NULL);
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break;
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}
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default:
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printf("Unknon syscall id %d\n", syscallId);
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ret = -ENOENT;
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}
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return ret;
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}
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