pjht/os
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Send_msg should now work across address spaces

Browse Source
This commit is contained in:
pjht 2019-05-04 10:59:23 -05:00
parent 35bba425ac
commit 9952f5f382
1 changed files with 4 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
cpu/i386/tasking.c
View File

@ -83,12 +83,15 @@ void tasking_send_msg(uint32_t pid,void* msg,uint32_t size) {
if (task->pid==pid) {
uint32_t cr3;
asm volatile("movl %%cr3, %%eax; movl %%eax, %0;":"=m"(cr3)::"%eax");
void* phys_addr=virt_to_phys(msg);
load_address_space(task->regs.cr3);
uint32_t page=find_free_pages((size/4096)+1);
map_pages(page<<12,phys_addr,(size/4096)+1,1,0);
if (task->msg_store==NULL) {
task->msg_store=malloc(sizeof(void*)*256);
task->sender_store=malloc(sizeof(uint32_t)*256);
}
task->msg_store[task->wr]=msg;
task->msg_store[task->wr]=(void*)(page<<12);
task->sender_store[task->wr]=currentTask->pid;
load_address_space(cr3);
task->wr++;