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Add UEFI support
This is mutually exclusive with Windows support. Documentation for how to use it has been written in libc/runtime/efimain.c
This commit is contained in:
Justine Tunney
Justine Tunney
parent
c6c9b5dfde
commit
537c21338b
24 changed files with 1381 additions and 391 deletions
72
libc/runtime/efimain.c
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72
libc/runtime/efimain.c
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@ -0,0 +1,72 @@
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/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2021 Justine Alexandra Roberts Tunney │
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│ │
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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above copyright notice and this permission notice appear in all copies. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/calls/efi.h"
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#include "libc/dce.h"
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#include "libc/nt/efi.h"
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#include "libc/nt/thunk/msabi.h"
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#include "libc/runtime/runtime.h"
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/**
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* EFI Application Entrypoint.
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*
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* This entrypoint is mutually exclusive from WinMain since
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* Windows apps and EFI apps use the same PE binary format.
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* By default, we build binaries to support Windows. If you
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* want to your APE executable to boot on UEFI instead then
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* you need to run the following build command:
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*
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* make -j8 CPPFLAGS=-DSUPPORT_VECTOR=251
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*
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* That'll remove all the Windows code and turn EFI on. You
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* can also remove by BIOS code too, by changing 251 to 249
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* but it shouldn't matter. Here's how to emulate EFI apps:
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*
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* qemu-system-x86_64 \
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* -bios OVMF.fd \
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* -serial stdio \
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* -net none \
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* -drive format=raw,file=fat:rw:o/tool/viz
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* FS0:
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* deathstar.com
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*
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* If you're using the amalgamated release binaries then it
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* should be possible to enable UEFI mode by having this at
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* the top of your main source file to hint the APE linker:
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*
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* STATIC_YOINK("EfiMain");
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* int main() { ... }
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*
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* @see libc/dce.h
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*/
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__msabi noasan EFI_STATUS EfiMain(EFI_HANDLE ImageHandle,
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EFI_SYSTEM_TABLE *SystemTable) {
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extern char os asm("__hostos");
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os = UEFI;
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__efi_image_handle = ImageHandle;
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__efi_system_table = SystemTable;
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asm("push\t$0\n\t"
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"push\t$0\n\t"
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"push\t$0\n\t"
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"push\t$0\n\t"
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"push\t$0\n\t"
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"xor\t%edi,%edi\n\t"
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".weak\t_start\n\t"
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"jmp\t_start");
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unreachable;
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}
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@ -1,7 +1,7 @@
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/*-*- mode:unix-assembly; indent-tabs-mode:t; tab-width:8; coding:utf-8 -*-│
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│vi: set et ft=asm ts=8 tw=8 fenc=utf-8 :vi│
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/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2020 Justine Alexandra Roberts Tunney │
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│ Copyright 2021 Justine Alexandra Roberts Tunney │
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│ │
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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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@ -16,15 +16,16 @@
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/macros.h"
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.privileged
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.source __FILE__
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#include "libc/runtime/runtime.h"
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// Terminates process, ignoring destructors and atexit() handlers.
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//
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// @param edi is exit code ∈ [0,256)
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// @asyncsignalsafe
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// @vforksafe
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// @noreturn
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_exit: jmp _Exit
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.endfn _exit,globl,protected
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/**
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* Terminates process, ignoring destructors and atexit() handlers.
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*
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* @param rc is exit code ∈ [0,256)
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* @asyncsignalsafe
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* @vforksafe
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* @noreturn
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*/
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wontreturn void _exit(int rc) {
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_Exit(rc);
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}
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@ -1,7 +1,7 @@
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/*-*- mode:unix-assembly; indent-tabs-mode:t; tab-width:8; coding:utf-8 -*-│
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│vi: set et ft=asm ts=8 tw=8 fenc=utf-8 :vi│
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/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2020 Justine Alexandra Roberts Tunney │
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│ Copyright 2021 Justine Alexandra Roberts Tunney │
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│ │
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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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@ -16,30 +16,29 @@
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/calls/efi.h"
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#include "libc/calls/internal.h"
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#include "libc/dce.h"
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#include "libc/runtime/internal.h"
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#include "libc/macros.h"
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.privileged
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#include "libc/nexgen32e/vendor.internal.h"
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#include "libc/nt/runtime.h"
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#include "libc/runtime/runtime.h"
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// Terminates process, ignoring destructors and atexit() handlers.
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//
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// @param edi is exit code ∈ [0,256)
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// @asyncsignalsafe
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// @vforksafe
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// @noreturn
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_Exit: push %rbp
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mov %rsp,%rbp
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#if SupportsWindows()
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testb IsWindows()
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jz 1f
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sub $32,%rsp
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movzbl %dil,%ecx # %ERRORLEVEL% is limitless
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call *__imp_ExitProcess(%rip)
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#endif
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1: mov __NR_exit_group(%rip),%eax
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syscall
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#if SupportsMetal()
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call triplf
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#endif
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.endfn _Exit,globl,protected
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.hidden __NR_exit_group
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/**
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* Terminates process, ignoring destructors and atexit() handlers.
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*
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* @param rc is exit code ∈ [0,256)
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* @asyncsignalsafe
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* @vforksafe
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* @noreturn
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*/
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wontreturn void _Exit(int rc) {
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if ((!IsWindows() && !IsMetal() && !IsUefi()) ||
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(IsMetal() && IsGenuineCosmo())) {
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sys_exit(rc);
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} else if (IsUefi()) {
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__efi_system_table->BootServices->Exit(__efi_image_handle, rc, 0, NULL);
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} else if (IsWindows()) {
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ExitProcess(rc & 0xff);
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}
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triplf();
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}
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@ -73,12 +73,6 @@ void *sbrk(intptr_t);
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int brk(void *);
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int NtGetVersion(void);
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/*───────────────────────────────────────────────────────────────────────────│─╗
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│ cosmopolitan § runtime » optimizations ─╬─│┼
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╚────────────────────────────────────────────────────────────────────────────│*/
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#define _exit(RC) _Exit(RC)
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COSMOPOLITAN_C_END_
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#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
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#endif /* COSMOPOLITAN_LIBC_RUNTIME_RUNTIME_H_ */
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