Merge branch 'ldelf-fix' into signal

kernel/ld.cc

@@ -12,7 +12,7 @@ xlen_t ld::loadElf(const uint8_t *buff,vm::VMAR &vmar){
     for(int i=0;i<elfHeader->e_phnum;i++){
         const Elf64_Phdr &entry=phdrTable[i];
         if(entry.p_type!=PT_LOAD)continue;
-        int pages=vm::bytes2pages(entry.p_memsz);
+        int pages=vm::bytes2pages(entry.p_vaddr+entry.p_memsz)-vm::bytes2pages(entry.p_vaddr)+1;
         vm::PageNum ppn=(kGlobObjs->pageMgr->alloc(pages));
         Log(debug,"%x<=%x[%d pages@%x]",vm::addr2pn(entry.p_vaddr),ppn,pages,ld::elf::flags2perm(entry.p_flags));
         vmar.map(vm::PageMapping{vm::addr2pn(entry.p_vaddr),vm::VMO{ppn,pages},ld::elf::flags2perm(entry.p_flags),vm::PageMapping::MappingType::file});