cos2000v2/lib/syscall.c

94 lines
2.4 KiB
C
Raw Normal View History

/*******************************************************************************/
/* COS2000 - Compatible Operating System - LGPL v3 - Horde Nicolas */
/* */
#include <types.h>
#include <gdt.h>
#include <asm.h>
#include <memory.h>
#include <interrupts.h>
#include <syscall.h>
#include <process.h>
2018-09-18 15:11:50 +02:00
/* 32bit SYSENTER instruction entry.
*
* Arguments:
* %eax System call number.
* %ebx Arg1
* %esi Arg2
* %edi Arg3*/
extern wrapper_sysenter;
/*******************************************************************************/
/* Initialise les appels système par SYSENTER/SYSEXIT */
void initsyscall(void)
{
wrmsr(0x174, SEL_KERNEL_CODE, 0x0);
wrmsr(0x175, 0x60000, 0x0);
wrmsr(0x176, &wrapper_sysenter, 0x0);
return;
}
/*******************************************************************************/
/* Fonction permettant de tester le fonctionnement de SYSENTER */
/* SYSCALL
{
"ID":0,
"LIBRARY":"libsys",
"NAME":"testapi",
"INTERNALNAME":"testapi",
"DESCRIPTION":"Simple function to test if SYSCALL API is correctly running",
"ARGS": [
{"TYPE":"u32","NAME":"arg1","DESCRIPTION":"first argument of your choice"},
{"TYPE":"u32","NAME":"arg2","DESCRIPTION":"second argument of your choice"},
{"TYPE":"u32","NAME":"arg3","DESCRIPTION":"third argument of your choice"}
],
"RETURN":"u32",
"DUMP":"yes"
}
END */
u32 testapi(u32 arg1, u32 arg2, u32 arg3, regs* dump)
{
printf("Appel syscall %u depuis %Y:%Y avec arguments => ARG1:%Y ARG2:%Y ARG3:%Y\r\n", dump->eax, (u32) dump->cs, dump->eip, arg1, arg2, arg3);
return;
}
/*******************************************************************************/
/* Entrée pour les appels système SYSENTER */
__attribute__ ((noreturn)) void sysenter_handler(regs *dump)
{
sti();
switch (dump->eax)
{
case 2:
dump->eax=(u32) print(dump->ebx);
break;
case 0:
dump->eax=(u32) testapi(dump->ebx, dump->esi, dump->edi, dump);
break;
case 4:
dump->eax=(u32) gettimer();
break;
case 1:
dump->eax=(u32) waitascii();
break;
case 5:
processexit(dump->ebx);
break;
default:
printf("Appel syscall vers fonction inexistante en %Y:%Y", dump->cs, dump->eip);
break;
}
//dump->eflags &= ~(1 << 6);
dump->eflags |= (1 << 6);
setESP(dump);
restcpu_user();
sysexit();
}
/*******************************************************************************/