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// MIT License, Copyright (c) 2020 Marvin Borner
#include <fs.h>
#include <load.h>
#include <mem.h>
#include <mm.h>
#include <str.h>
// TODO: Fix pdi < 256!
#define PROC_DATA_ADDR 0xc000000
#define PROC_STACK_SIZE 0x4000
#define PROC_STACK_ADDR (PROC_DATA_ADDR - 256)
void proc_load(struct proc *proc, u32 entry)
{
/* memory_dir_switch(proc->page_dir); */
u32 paddr = physical_alloc(PROC_STACK_SIZE);
virtual_map(proc->page_dir, PROC_STACK_ADDR, paddr, PROC_STACK_SIZE,
MEMORY_USER | MEMORY_CLEAR);
proc->regs.ebp = PROC_STACK_ADDR;
proc->regs.useresp = PROC_STACK_ADDR;
proc->regs.eip = entry;
proc->entry = entry;
}
int bin_load(const char *path, struct proc *proc)
{
struct stat s = { 0 };
vfs_stat(path, &s);
struct proc *current = proc_current();
struct page_dir *prev = current ? current->page_dir : memory_kernel_dir();
u32 size = PAGE_ALIGN_UP(s.size);
memory_dir_switch(proc->page_dir);
u32 paddr = physical_alloc(size);
virtual_map(proc->page_dir, PROC_DATA_ADDR, paddr, size, MEMORY_USER | MEMORY_CLEAR);
if (!vfs_read(path, (void *)PROC_DATA_ADDR, 0, s.size)) {
memory_dir_switch(prev);
return 1;
}
strcpy(proc->name, path);
proc_load(proc, PROC_DATA_ADDR);
memory_dir_switch(prev);
return 0;
}
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