mirror of https://github.com/tailix/libkernaux.git
76 lines
1.7 KiB
C
76 lines
1.7 KiB
C
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
|
|
#include "../../assert.h"
|
|
|
|
#include <kernaux/arch/i386.h>
|
|
|
|
#include <string.h>
|
|
|
|
#define DPL (0x60u & (dpl << 5))
|
|
|
|
void KernAux_Arch_I386_IDTE_init_intr(
|
|
const KernAux_Arch_I386_IDTE idte,
|
|
const uint32_t offset,
|
|
const uint16_t cs_selector,
|
|
const uint8_t dpl
|
|
) {
|
|
KERNAUX_NOTNULL(idte);
|
|
|
|
memset(idte, 0, sizeof(*idte));
|
|
KernAux_Arch_I386_IDTE_set_offset(idte, offset);
|
|
idte->selector = cs_selector;
|
|
idte->flags |= 0x80u | DPL | 0xeu; // 1-00-01110
|
|
}
|
|
|
|
void KernAux_Arch_I386_IDTE_init_task(
|
|
const KernAux_Arch_I386_IDTE idte,
|
|
const uint16_t tss_selector,
|
|
const uint8_t dpl
|
|
) {
|
|
KERNAUX_NOTNULL(idte);
|
|
|
|
memset(idte, 0, sizeof(*idte));
|
|
idte->selector = tss_selector;
|
|
idte->flags |= 0x80u | DPL | 0x5u; // 1-00-00101
|
|
}
|
|
|
|
void KernAux_Arch_I386_IDTE_init_trap(
|
|
const KernAux_Arch_I386_IDTE idte,
|
|
const uint32_t offset,
|
|
const uint16_t cs_selector,
|
|
const uint8_t dpl
|
|
) {
|
|
KERNAUX_NOTNULL(idte);
|
|
|
|
memset(idte, 0, sizeof(*idte));
|
|
KernAux_Arch_I386_IDTE_set_offset(idte, offset);
|
|
idte->selector = cs_selector;
|
|
idte->flags |= 0x80u | DPL | 0xfu; // 1-00-01111
|
|
}
|
|
|
|
uint32_t KernAux_Arch_I386_IDTE_offset(const KernAux_Arch_I386_IDTE idte)
|
|
{
|
|
KERNAUX_NOTNULL(idte);
|
|
|
|
return (idte->offset_high << 16) | idte->offset_low;
|
|
}
|
|
|
|
uint8_t KernAux_Arch_I386_IDTE_dpl(const KernAux_Arch_I386_IDTE idte)
|
|
{
|
|
KERNAUX_NOTNULL(idte);
|
|
|
|
return 3 & (idte->flags >> 5);
|
|
}
|
|
|
|
void KernAux_Arch_I386_IDTE_set_offset(
|
|
const KernAux_Arch_I386_IDTE idte,
|
|
const uint32_t offset
|
|
) {
|
|
KERNAUX_NOTNULL(idte);
|
|
|
|
idte->offset_low = 0xffffu & offset;
|
|
idte->offset_high = 0xffffu & (offset >> 16);
|
|
}
|