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LibELF: Optimize LoadableELF::clone() memory usage 

We only clone mapped pages that have been marked as writeble.
Read/execute only pages will be exactly as in the file itself and
can be demand paged also :D
This commit is contained in:
Bananymous 2023-09-29 02:05:12 +03:00
parent 603fc200e6
commit 7e9e4c47ae
1 changed files with 3 additions and 0 deletions
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3
LibELF/LibELF/LoadableELF.cpp
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@ -252,6 +252,9 @@ namespace LibELF
break; break;
case PT_LOAD: case PT_LOAD:
{ {
if (!(program_header.p_flags & LibELF::PF_W))
continue;
PageTable::flags_t flags = PageTable::Flags::UserSupervisor | PageTable::Flags::Present; PageTable::flags_t flags = PageTable::Flags::UserSupervisor | PageTable::Flags::Present;
if (program_header.p_flags & LibELF::PF_W) if (program_header.p_flags & LibELF::PF_W)
flags |= PageTable::Flags::ReadWrite; flags |= PageTable::Flags::ReadWrite;