Files
lk/lib/uefi/switch_stack.S
Travis Geiselbrecht 31448f52db [lib][uefi] fix a few warnings and a little code tidying
GCC 14 is quite picky about warnings, probably more so than clang.

-Fix a bunch of printf warnings. Pointers should be printed with %p.
-Move some stuff into an anonymous namespace.
-Worked around GCC really not liking reinterpret_casting from one
function pointer type to another. Fiddled with it a bit and eventually
settled on casting the function pointer to const void * and passing it
through.
2025-01-11 16:35:42 -08:00

41 lines
1.0 KiB
ArmAsm

/*
* Copyright (C) 2024 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
#include <lk/asm.h>
// int call_with_stack_asm(void *stack, int (*fp)(), int arg1, int arg2, int arg3, int arg4);
FUNCTION(call_with_stack_asm)
stp fp, lr, [sp, #-16]!
mov fp, sp
sub x0,x0,16
mov x7,sp
str x7,[x0]
mov sp,x0
mov x6,x1
mov x0,x2
mov x1,x3
mov x2,x4
mov x3,x5
blr x6
ldr x7,[sp]
mov sp,x7
ldp fp, lr, [sp], 16
ret lr
END_FUNCTION(call_with_stack_asm)