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