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author | Ivan Gorinov <ivan.gorinov@intel.com> | 2018-06-13 17:27:39 -0700 |
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committer | Bin Meng <bmeng.cn@gmail.com> | 2018-06-17 21:16:04 +0800 |
commit | 9f0b0113c975d08c7fc5a509d67f128515486c0c (patch) | |
tree | 66bd88546ee2ca7e88652eb1de31c11e3f014952 /include/micrel.h | |
parent | e3ec0d03bb1df69e8c9aba3eebba0690dc8e538b (diff) |
x86: use EFI calling convention for efi_main on x86_64
UEFI specifies the calling convention used in Microsoft compilers;
first arguments of a function are passed in (%rcx, %rdx, %r8, %r9).
All other compilers use System V ABI by default, passing first integer
arguments of a function in (%rdi, %rsi, %rdx, %rcx, %r8, %r9).
These ABI also specify different sets of registers that must be preserved
across function calls (callee-saved).
GCC allows using the Microsoft calling convention by adding the ms_abi
attribute to a function declaration.
Current EFI implementation in U-Boot specifies EFIAPI for efi_main()
in the test apps but uses default calling convention in lib/efi.
Save efi_main() arguments in the startup code on x86_64;
use EFI calling convention for _relocate() on x86_64;
consistently use EFI calling convention for efi_main() everywhere.
Signed-off-by: Ivan Gorinov <ivan.gorinov@intel.com>
Reviewed-by: Alexander Graf <agraf@suse.de>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Tested-by: Bin Meng <bmeng.cn@gmail.com>
Diffstat (limited to 'include/micrel.h')
0 files changed, 0 insertions, 0 deletions