Commit 680d3cd1fc

David Gonzalez Martin <davidgm94.work@protonmail.com>
2022-10-21 00:26:57
UEFI: Querying memory map size with no allocation
This makes possible to query the memory map size from EFI firmware without making any allocation beforehand. This makes possible to be precise about the size of the allocation which will own a copy of the memory map from the UEFI application.
master
1 parent 972c39e
Changed files (1)
lib
std
os
uefi
tables
boot_services.zig
lib/std/os/uefi/tables/boot_services.zig
@@ -34,7 +34,7 @@ pub const BootServices = extern struct {
     freePages: std.meta.FnPtr(fn (memory: [*]align(4096) u8, pages: usize) callconv(.C) Status),
 
     /// Returns the current memory map.
-    getMemoryMap: std.meta.FnPtr(fn (mmap_size: *usize, mmap: [*]MemoryDescriptor, mapKey: *usize, descriptor_size: *usize, descriptor_version: *u32) callconv(.C) Status),
+    getMemoryMap: std.meta.FnPtr(fn (mmap_size: *usize, mmap: ?[*]MemoryDescriptor, mapKey: *usize, descriptor_size: *usize, descriptor_version: *u32) callconv(.C) Status),
 
     /// Allocates pool memory.
     allocatePool: std.meta.FnPtr(fn (pool_type: MemoryType, size: usize, buffer: *[*]align(8) u8) callconv(.C) Status),