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/*-
* Copyright (c) 2000 Doug Rabson
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <bootstrap.h>
#include <efi.h>
#include <eficonsctl.h>
#include <efilib.h>
#include <stand.h>
static EFI_PHYSICAL_ADDRESS heap;
static UINTN heapsize;
void
efi_exit(EFI_STATUS exit_code)
{
if (boot_services_active) {
BS->FreePages(heap, EFI_SIZE_TO_PAGES(heapsize));
BS->Exit(IH, exit_code, 0, NULL);
} else {
RS->ResetSystem(EfiResetCold, EFI_SUCCESS, 0, NULL);
}
}
void
exit(int status)
{
efi_exit(EFI_LOAD_ERROR);
}
static CHAR16 *
arg_skipsep(CHAR16 *argp)
{
while (*argp == ' ' || *argp == '\t' || *argp == '\n')
argp++;
return (argp);
}
static CHAR16 *
arg_skipword(CHAR16 *argp)
{
while (*argp && *argp != ' ' && *argp != '\t' && *argp != '\n')
argp++;
return (argp);
}
EFI_STATUS
efi_main(EFI_HANDLE image_handle, EFI_SYSTEM_TABLE *system_table)
{
static EFI_GUID image_protocol = LOADED_IMAGE_PROTOCOL;
static EFI_GUID console_control_protocol =
EFI_CONSOLE_CONTROL_PROTOCOL_GUID;
EFI_CONSOLE_CONTROL_PROTOCOL *console_control = NULL;
EFI_LOADED_IMAGE *img;
CHAR16 *argp, *args, **argv;
EFI_STATUS status;
int argc, addprog;
IH = image_handle;
ST = system_table;
BS = ST->BootServices;
RS = ST->RuntimeServices;
status = BS->LocateProtocol(&console_control_protocol, NULL,
(VOID **)&console_control);
if (status == EFI_SUCCESS)
(void)console_control->SetMode(console_control,
EfiConsoleControlScreenText);
heapsize = 64 * 1024 * 1024;
status = BS->AllocatePages(AllocateAnyPages, EfiLoaderData,
EFI_SIZE_TO_PAGES(heapsize), &heap);
if (status != EFI_SUCCESS) {
ST->ConOut->OutputString(ST->ConOut, (CHAR16 *)L"Failed to allocate memory for heap.\r\n");
BS->Exit(IH, status, 0, NULL);
}
setheap((void *)(uintptr_t)heap, (void *)(uintptr_t)(heap + heapsize));
/* Start tslog now that we have a heap.*/
tslog_init();
/* Use efi_exit() from here on... */
status = OpenProtocolByHandle(IH, &image_protocol, (void**)&img);
if (status != EFI_SUCCESS)
efi_exit(status);
/*
* Pre-process the (optional) load options. If the option string
* is given as an ASCII string, we use a poor man's ASCII to
* Unicode-16 translation. The size of the option string as given
* to us includes the terminating null character. We assume the
* string is an ASCII string if strlen() plus the terminating
* '\0' is less than LoadOptionsSize. Even if all Unicode-16
* characters have the upper 8 bits non-zero, the terminating
* null character will cause a one-off.
* If the string is already in Unicode-16, we make a copy so that
* we know we can always modify the string.
*/
if (img->LoadOptionsSize > 0 && img->LoadOptions != NULL) {
if (img->LoadOptionsSize == strlen(img->LoadOptions) + 1) {
args = malloc(img->LoadOptionsSize << 1);
for (argc = 0; argc < (int)img->LoadOptionsSize; argc++)
args[argc] = ((char*)img->LoadOptions)[argc];
} else {
args = malloc(img->LoadOptionsSize);
memcpy(args, img->LoadOptions, img->LoadOptionsSize);
}
} else
args = NULL;
/*
* Use a quick and dirty algorithm to build the argv vector. We
* first count the number of words. Then, after allocating the
* vector, we split the string up. We don't deal with quotes or
* other more advanced shell features.
* The EFI shell will pass the name of the image as the first
* word in the argument list. This does not happen if we're
* loaded by the boot manager. This is not so easy to figure
* out though. The ParentHandle is not always NULL, because
* there can be a function (=image) that will perform the task
* for the boot manager.
*/
/* Part 1: Figure out if we need to add our program name. */
addprog = (args == NULL || img->ParentHandle == NULL ||
img->FilePath == NULL) ? 1 : 0;
if (!addprog) {
addprog =
(DevicePathType(img->FilePath) != MEDIA_DEVICE_PATH ||
DevicePathSubType(img->FilePath) != MEDIA_FILEPATH_DP ||
DevicePathNodeLength(img->FilePath) <=
sizeof(FILEPATH_DEVICE_PATH)) ? 1 : 0;
if (!addprog) {
/* XXX todo. */
}
}
/* Part 2: count words. */
argc = (addprog) ? 1 : 0;
argp = args;
while (argp != NULL && *argp != 0) {
argp = arg_skipsep(argp);
if (*argp == 0)
break;
argc++;
argp = arg_skipword(argp);
}
/* Part 3: build vector. */
argv = malloc((argc + 1) * sizeof(CHAR16*));
argc = 0;
if (addprog)
argv[argc++] = (CHAR16 *)L"loader.efi";
argp = args;
while (argp != NULL && *argp != 0) {
argp = arg_skipsep(argp);
if (*argp == 0)
break;
argv[argc++] = argp;
argp = arg_skipword(argp);
/* Terminate the words. */
if (*argp != 0)
*argp++ = 0;
}
argv[argc] = NULL;
status = main(argc, argv);
efi_exit(status);
return (status);
}
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