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UserspaceEmulator: Interpret zero-alignment as page-sized alignment

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This commit fixes an issue where zero-alignment would lead to the
requested range being allocated outside of the total available range,
hitting an assert in RangeAllocator::allocate_anywhere().
This commit is contained in:
Rummskartoffel 2022-01-08 20:46:59 +01:00 • committed by Andreas Kling
commit 89502fc329
Notes: sideshowbarker 2024-07-17 21:24:14 +09:00
1 changed files with 1 additions and 0 deletions
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Userland/DevTools/UserspaceEmulator/Emulator_syscalls.cpp
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@ -866,6 +866,7 @@ u32 Emulator::virt$mmap(u32 params_addr)
{ {
Syscall::SC_mmap_params params; Syscall::SC_mmap_params params;
mmu().copy_from_vm(&params, params_addr, sizeof(params)); mmu().copy_from_vm(&params, params_addr, sizeof(params));
params.alignment = params.alignment ? params.alignment : PAGE_SIZE;
u32 requested_size = round_up_to_power_of_two(params.size, PAGE_SIZE); u32 requested_size = round_up_to_power_of_two(params.size, PAGE_SIZE);
FlatPtr final_address; FlatPtr final_address;