fix: false positive when looking for room to host pmem_list

  some weird mem region reported by multiboot might be "just"
  enough to house pmem_list, but not considering the L0T alignment

  make it to retry instead of fold up instantly

diff --git a/lunaix-os/arch/x86/mm/pmm.c b/lunaix-os/arch/x86/mm/pmm.c
index aa35b86b99b4e167ef1a8efa36348e91760b38eb..8f350f426e90b0f7f502e4f5c8e89034f9f0db78 100644 (file)
--- a/lunaix-os/arch/x86/mm/pmm.c
+++ b/lunaix-os/arch/x86/mm/pmm.c
@@ -17,8 +17,10 @@ pmm_arch_init_remap(struct pmem* memory, struct boot_handoff* bctx)
     
     size_t i = 0;
     struct boot_mmapent* ent;
     
     size_t i = 0;
     struct boot_mmapent* ent;

-    for (; i < bctx->mem.mmap_len; i++) {
-        ent = &bctx->mem.mmap[i];
+
+restart:;
+    while (i < bctx->mem.mmap_len) {
+        ent = &bctx->mem.mmap[i++];

         if (free_memregion(ent) && ent->size > pool_size) {
             goto found;
         }
         if (free_memregion(ent) && ent->size > pool_size) {
             goto found;
         }


@@ -38,7 +40,7 @@ found:;
 #endif
 
     if (aligned_pplist + pool_size > ent->start + ent->size) {
 #endif
 
     if (aligned_pplist + pool_size > ent->start + ent->size) {

-        return 0;
+        goto restart;

     }
 
     // for x86_32, the upper bound of memory requirement for pplist
     }
 
     // for x86_32, the upper bound of memory requirement for pplist