zig

commit 680d3cd1fc285a661bb32f90090a8ea2da986f75 (tree)
parent 972c39e2c00c487a483bad002ef33ca1a5c21d02
Author: David Gonzalez Martin <davidgm94.work@protonmail.com>
Date:   Thu, 20 Oct 2022 17:26:57 -0500

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.

Diffstat:
M
lib/std/os/uefi/tables/boot_services.zig
 | 
2
+-

1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/lib/std/os/uefi/tables/boot_services.zig b/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),