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mmap fix 

Keep region list sorted on heap grow
Fix checking region overlap
Assert that mmap appends at loaded address for init
This commit is contained in:
Mathieu Maret 2024-02-12 18:25:27 +01:00 committed by Mathieu Maret
parent f8b1b2c5a7
commit 758017a8e7
2 changed files with 10 additions and 3 deletions
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2
core/elf.c
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@ -148,7 +148,7 @@ uaddr_t loadElfProg(const char *prog, struct process *proc)
// 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);
assert(zeroMmap(as, &uaddr, elf_phdrs[i].p_memsz, PAGING_MEM_USER | PAGING_MEM_WRITE | PAGING_MEM_READ, 0) == 0);
}
processInitHeap(proc, lastUserAddr);

11
core/uaddrspace.c
View File

@ -216,7 +216,8 @@ int uAddrSpaceUnmap(struct uAddrSpace *as, uaddr_t uaddr, size_t size)
reg->res->ops->unmap(reg, uaddr, size);
break;
// Only affect the end
} else if (uaddr > reg->addr && uaddr + size > reg->addr + reg->size) {
} else if (uaddr > reg->addr && uaddr < reg->addr + size &&
uaddr + size > reg->addr + reg->size) {
size_t unmapSize = reg->addr + reg->size - uaddr;
reg->size = uaddr - reg->addr;
@ -306,7 +307,13 @@ int uAddrSpaceHeapCheckNAlloc(struct uAddrSpace *as, vaddr_t addr)
newReg->size = PAGE_SIZE;
newReg->right = right;
list_add_tail_named(as->listVirtualReg, newReg, nextInAddrSpace, prevInAddrSpace);
// keep the AS list sorted
struct uAddrVirtualReg *prev = findVirtualRegionBeforeAddr(as, addrAlign);
if (prev)
list_insert_after_named(as->listVirtualReg, prev, newReg, prevInAddrSpace,
nextInAddrSpace);
else
list_add_tail_named(as->listVirtualReg, newReg, nextInAddrSpace, prevInAddrSpace);
unrefPhyPage(ppage);