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Make copy_data a syscall

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pjht 2019-05-06 08:35:59 -05:00
parent 3856a5dc0a
commit 2497befcea
6 changed files with 19 additions and 2 deletions
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2
cpu/i386/address_spaces.c
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@ -1,6 +1,6 @@
#include "paging.h"
void copy_data(void* cr3, void* data,uint32_t size,void* virt_addr) {
void address_spaces_copy_data(void* cr3, void* data,uint32_t size,void* virt_addr) {
uint32_t old_cr3;
asm volatile("movl %%cr3, %%eax; movl %%eax, %0;":"=m"(old_cr3)::"%eax");
void* phys_addr=virt_to_phys(data);

2
cpu/i386/address_spaces.h
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@ -3,6 +3,6 @@
#include <stdint.h>
void copy_data(void* cr3, void* data,uint32_t size,void* virt_addr);
void address_spaces_copy_data(void* cr3, void* data,uint32_t size,void* virt_addr);
#endif

3
cpu/i386/isr.c
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@ -7,6 +7,7 @@
#include "../../drivers/vga.h"
#include "../tasking.h"
#include "interrupt.h"
#include "address_spaces.h"
#include <string.h>
#include <stdint.h>
void irq_handler(registers_t r);
@ -187,6 +188,8 @@ void isr_handler(registers_t r) {
r.ebx=(uint32_t)paging_new_address_space();
} else if (r.eax==9) {
tasking_createTaskCr3((void*)r.ebx,(void*)r.ecx);
} else if (r.eax==10) {
address_spaces_copy_data((void*)r.ebx,(void*)r.ecx,r.edx,(void*)r.esi);
}
break;
}

BIN
initrd/init
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13
libc/memory.c
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@ -24,3 +24,16 @@ void* new_address_space() {
":"=b"(cr3));
return cr3;
}
void copy_data(void* cr3, void* data,uint32_t size,void* virt_addr) {
asm volatile(" \
mov $10, %%eax; \
int $80; \
"::"b"(cr3),"c"(data),"d"(size),"S"(virt_addr));
// uint32_t old_cr3;
// asm volatile("movl %%cr3, %%eax; movl %%eax, %0;":"=m"(old_cr3)::"%eax");
// void* phys_addr=virt_to_phys(data);
// load_address_space(cr3);
// map_pages(virt_addr,phys_addr,(size/4096)+1,1,1);
// load_address_space(old_cr3);
}

1
libc/memory.h
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@ -8,5 +8,6 @@
void* alloc_memory(uint32_t num_pages);
void alloc_memory_virt(uint32_t num_pages,void* addr);
void* new_address_space();
void copy_data(void* cr3, void* data,uint32_t size,void* virt_addr);
#endif