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Make cursor-off use a system call

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This commit is contained in:
Kevin Lange 2017-01-29 18:48:10 +09:00
parent 3010630796
commit 64c8e85324
2 changed files with 16 additions and 8 deletions
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13
kernel/sys/syscall.c
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@ -665,6 +665,19 @@ static int sys_sysfunc(int fn, char ** args) {
return 0;
break;
case 13:
/*
* Set VGA text-mode cursor location
* (Not actually used to place a cursor, we use this to move the cursor off screen)
*/
PTR_VALIDATE(args);
outportb(0x3D4, 14);
outportb(0x3D5, (unsigned int)args[0]);
outportb(0x3D4, 15);
outportb(0x3D5, (unsigned int)args[1]);
return 0;
default:
debug_print(ERROR, "Bad system function %d", fn);
break;

11
userspace/extra/cursor-off.c
View File

@ -1,11 +1,6 @@
static void outb(unsigned char _data, unsigned short _port) {
__asm__ __volatile__ ("outb %1, %0" : : "dN" (_port), "a" (_data));
}
#include <syscall.h>
int main(int argc, char * argv[]) {
/* This should remove the hardware cursor. */
outb(14, 0x3D4);
outb(0xFF, 0x3D5);
outb(15, 0x3D4);
outb(0xFF, 0x3D5);
int x[] = {0xFF,0xFF};
return syscall_system_function(13, (char **)x);
}