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Assign a mapped ressource to init prog

This commit is contained in:
Mathieu Maret 2024-02-08 20:54:29 +01:00 committed by Mathieu Maret
parent cca78b269d
commit 1895781213
2 changed files with 16 additions and 1 deletions
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7
core/elf.c
View File

@ -5,6 +5,7 @@
#include "paging.h"
#include "thread.h"
#include "types.h"
#include "zero.h"
/**
* Make sure the program is in a valid ELF format, map it into memory,
@ -17,6 +18,7 @@ uaddr_t loadElfProg(const char *prog, struct process *proc)
{
int i;
uaddr_t lastUserAddr = 0;
struct uAddrSpace *as = processGetAddrSpace(proc);
/* e_ident value */
#define ELFMAG0 0x7f
@ -136,6 +138,11 @@ uaddr_t loadElfProg(const char *prog, struct process *proc)
unrefPhyPage(ppage);
}
// Hack: Even if already allocated mark the adresse space as managed by a ressource
// So this address space is not used by another ressource.
uaddr = elf_phdrs[i].p_vaddr;
zeroMmap(as, &uaddr, elf_phdrs[i].p_memsz, PAGING_MEM_USER | PAGING_MEM_WRITE | PAGING_MEM_READ, 0);
/* Copy segment into memory */
memcpy((void *)elf_phdrs[i].p_vaddr, (void *)(prog + elf_phdrs[i].p_offset),
elf_phdrs[i].p_filesz);

10
drivers/zero.c
View File

@ -57,6 +57,7 @@ int zeroOnMapped(struct uAddrVirtualReg *vreg)
int zeroMmap(struct uAddrSpace *as, uaddr_t *uaddr, size_t size, uint32_t rights,
uint32_t flags)
{
int ret = 0;
struct mappedRessource *res =
(struct mappedRessource *)zalloc(sizeof(struct mappedRessource));
struct zeroMappedEntry *cust =
@ -67,5 +68,12 @@ int zeroMmap(struct uAddrSpace *as, uaddr_t *uaddr, size_t size, uint32_t rights
res->customData = cust;
res->onResMapped = zeroOnMapped;
return uAddrSpaceMmap(as, uaddr, size, rights, flags, res, 0);
ret = uAddrSpaceMmap(as, uaddr, size, rights, flags, res, 0);
if (ret) {
free(res);
free(cust);
}
return ret;
}