[thirdparty/systemd.git] / src / boot / efi / stub.c

/* SPDX-License-Identifier: LGPL-2.1-or-later */

#include <efi.h>
#include <efilib.h>

#include "cpio.h"
#include "devicetree.h"
#include "disk.h"
#include "graphics.h"
#include "linux.h"
#include "measure.h"
#include "pe.h"
#include "secure-boot.h"
#include "splash.h"
#include "util.h"

/* magic string to find in the binary image */
_used_ _section_(".sdmagic") static const char magic[] = "#### LoaderInfo: systemd-stub " GIT_VERSION " ####";

static EFI_STATUS combine_initrd(
                EFI_PHYSICAL_ADDRESS initrd_base, UINTN initrd_size,
                const void *credential_initrd, UINTN credential_initrd_size,
                const void *sysext_initrd, UINTN sysext_initrd_size,
                EFI_PHYSICAL_ADDRESS *ret_initrd_base, UINTN *ret_initrd_size) {

        EFI_PHYSICAL_ADDRESS base = UINT32_MAX; /* allocate an area below the 32bit boundary for this */
        EFI_STATUS err;
        UINT8 *p;
        UINTN n;

        assert(ret_initrd_base);
        assert(ret_initrd_size);

        /* Combines three initrds into one, by simple concatenation in memory */

        n = ALIGN_TO(initrd_size, 4); /* main initrd might not be padded yet */
        if (credential_initrd) {
                if (n > UINTN_MAX - credential_initrd_size)
                        return EFI_OUT_OF_RESOURCES;

                n += credential_initrd_size;
        }
        if (sysext_initrd) {
                if (n > UINTN_MAX - sysext_initrd_size)
                        return EFI_OUT_OF_RESOURCES;

                n += sysext_initrd_size;
        }

        err = BS->AllocatePages(
                        AllocateMaxAddress,
                        EfiLoaderData,
                        EFI_SIZE_TO_PAGES(n),
                        &base);
        if (EFI_ERROR(err))
                return log_error_status_stall(err, L"Failed to allocate space for combined initrd: %r", err);

        p = PHYSICAL_ADDRESS_TO_POINTER(base);
        if (initrd_base != 0) {
                UINTN pad;

                /* Order matters, the real initrd must come first, since it might include microcode updates
                 * which the kernel only looks for in the first cpio archive */
                CopyMem(p, PHYSICAL_ADDRESS_TO_POINTER(initrd_base), initrd_size);
                p += initrd_size;

                pad = ALIGN_TO(initrd_size, 4) - initrd_size;
                if (pad > 0)  {
                        ZeroMem(p, pad);
                        p += pad;
                }
        }

        if (credential_initrd) {
                CopyMem(p, credential_initrd, credential_initrd_size);
                p += credential_initrd_size;
        }

        if (sysext_initrd) {
                CopyMem(p, sysext_initrd, sysext_initrd_size);
                p += sysext_initrd_size;
        }

        assert((UINT8*) PHYSICAL_ADDRESS_TO_POINTER(base) + n == p);

        *ret_initrd_base = base;
        *ret_initrd_size = n;

        return EFI_SUCCESS;
}

static void export_variables(EFI_LOADED_IMAGE *loaded_image) {
        CHAR16 uuid[37];

        assert(loaded_image);

        /* Export the device path this image is started from, if it's not set yet */
        if (efivar_get_raw(LOADER_GUID, L"LoaderDevicePartUUID", NULL, NULL) != EFI_SUCCESS)
                if (disk_get_part_uuid(loaded_image->DeviceHandle, uuid) == EFI_SUCCESS)
                        efivar_set(LOADER_GUID, L"LoaderDevicePartUUID", uuid, 0);

        /* If LoaderImageIdentifier is not set, assume the image with this stub was loaded directly from the
         * UEFI firmware without any boot loader, and hence set the LoaderImageIdentifier ourselves. Note
         * that some boot chain loaders neither set LoaderImageIdentifier nor make FilePath available to us,
         * in which case there's simple nothing to set for us. (The UEFI spec doesn't really say who's wrong
         * here, i.e. whether FilePath may be NULL or not, hence handle this gracefully and check if FilePath
         * is non-NULL explicitly.) */
        if (efivar_get_raw(LOADER_GUID, L"LoaderImageIdentifier", NULL, NULL) != EFI_SUCCESS &&
            loaded_image->FilePath) {
                _cleanup_freepool_ CHAR16 *s = NULL;

                s = DevicePathToStr(loaded_image->FilePath);
                if (s)
                        efivar_set(LOADER_GUID, L"LoaderImageIdentifier", s, 0);
                else
                        log_oom();
        }

        /* if LoaderFirmwareInfo is not set, let's set it */
        if (efivar_get_raw(LOADER_GUID, L"LoaderFirmwareInfo", NULL, NULL) != EFI_SUCCESS) {
                _cleanup_freepool_ CHAR16 *s = NULL;

                s = PoolPrint(L"%s %d.%02d", ST->FirmwareVendor, ST->FirmwareRevision >> 16, ST->FirmwareRevision & 0xffff);
                if (s)
                        efivar_set(LOADER_GUID, L"LoaderFirmwareInfo", s, 0);
                else
                        log_oom();
        }

        /* ditto for LoaderFirmwareType */
        if (efivar_get_raw(LOADER_GUID, L"LoaderFirmwareType", NULL, NULL) != EFI_SUCCESS) {
                _cleanup_freepool_ CHAR16 *s = NULL;

                s = PoolPrint(L"UEFI %d.%02d", ST->Hdr.Revision >> 16, ST->Hdr.Revision & 0xffff);
                if (s)
                        efivar_set(LOADER_GUID, L"LoaderFirmwareType", s, 0);
                else
                        log_oom();
        }

        /* add StubInfo */
        if (efivar_get_raw(LOADER_GUID, L"StubInfo", NULL, NULL) != EFI_SUCCESS)
                efivar_set(LOADER_GUID, L"StubInfo", L"systemd-stub " GIT_VERSION, 0);
}

EFI_STATUS efi_main(EFI_HANDLE image, EFI_SYSTEM_TABLE *sys_table) {

        enum {
                SECTION_CMDLINE,
                SECTION_LINUX,
                SECTION_INITRD,
                SECTION_SPLASH,
                SECTION_DTB,
                _SECTION_MAX,
        };

        const CHAR8* const sections[] = {
                [SECTION_CMDLINE] = (const CHAR8*) ".cmdline",
                [SECTION_LINUX]   = (const CHAR8*) ".linux",
                [SECTION_INITRD]  = (const CHAR8*) ".initrd",
                [SECTION_SPLASH]  = (const CHAR8*) ".splash",
                [SECTION_DTB]     = (const CHAR8*) ".dtb",
                NULL,
        };

        UINTN cmdline_len = 0, linux_size, initrd_size, dt_size;
        UINTN credential_initrd_size = 0, sysext_initrd_size = 0;
        _cleanup_freepool_ void *credential_initrd = NULL, *sysext_initrd = NULL;
        EFI_PHYSICAL_ADDRESS linux_base, initrd_base, dt_base;
        _cleanup_(devicetree_cleanup) struct devicetree_state dt_state = {};
        EFI_LOADED_IMAGE *loaded_image;
        UINTN addrs[_SECTION_MAX] = {};
        UINTN szs[_SECTION_MAX] = {};
        CHAR8 *cmdline = NULL;
        EFI_STATUS err;

        InitializeLib(image, sys_table);

        err = BS->OpenProtocol(
                        image,
                        &LoadedImageProtocol,
                        (void **)&loaded_image,
                        image,
                        NULL,
                        EFI_OPEN_PROTOCOL_GET_PROTOCOL);
        if (EFI_ERROR(err))
                return log_error_status_stall(err, L"Error getting a LoadedImageProtocol handle: %r", err);

        err = pe_memory_locate_sections(loaded_image->ImageBase, (const CHAR8**) sections, addrs, szs);
        if (EFI_ERROR(err))
                return log_error_status_stall(err, L"Unable to locate embedded .linux section: %r", err);

        /* Show splash screen as early as possible */
        graphics_splash((const UINT8*) loaded_image->ImageBase + addrs[SECTION_SPLASH], szs[SECTION_SPLASH], NULL);

        if (szs[SECTION_CMDLINE] > 0) {
                cmdline = (CHAR8*) loaded_image->ImageBase + addrs[SECTION_CMDLINE];
                cmdline_len = szs[SECTION_CMDLINE];
        }

        /* if we are not in secure boot mode, or none was provided, accept a custom command line and replace the built-in one */
        if ((!secure_boot_enabled() || cmdline_len == 0) && loaded_image->LoadOptionsSize > 0 &&
            *(CHAR16 *) loaded_image->LoadOptions > 0x1F) {
                CHAR16 *options;
                CHAR8 *line;

                options = (CHAR16 *)loaded_image->LoadOptions;
                cmdline_len = (loaded_image->LoadOptionsSize / sizeof(CHAR16)) * sizeof(CHAR8);
                line = AllocatePool(cmdline_len);
                if (!line)
                        return log_oom();

                for (UINTN i = 0; i < cmdline_len; i++)
                        line[i] = options[i];
                cmdline = line;

                /* Let's measure the passed kernel command line into the TPM. Note that this possibly
                 * duplicates what we already did in the boot menu, if that was already used. However, since
                 * we want the boot menu to support an EFI binary, and want to this stub to be usable from
                 * any boot menu, let's measure things anyway. */
                (void) tpm_log_load_options(loaded_image->LoadOptions);
        }

        export_variables(loaded_image);

        (void) pack_cpio(loaded_image,
                         L".cred",
                         (const CHAR8*) ".extra/credentials",
                         /* dir_mode= */ 0500,
                         /* access_mode= */ 0400,
                         /* tpm_pcr= */ TPM_PCR_INDEX_KERNEL_PARAMETERS,
                         L"Credentials initrd",
                         &credential_initrd,
                         &credential_initrd_size);

        (void) pack_cpio(loaded_image,
                         L".raw",
                         (const CHAR8*) ".extra/sysext",
                         /* dir_mode= */ 0555,
                         /* access_mode= */ 0444,
                         /* tpm_pcr= */ TPM_PCR_INDEX_INITRD,
                         L"System extension initrd",
                         &sysext_initrd,
                         &sysext_initrd_size);

        linux_size = szs[SECTION_LINUX];
        linux_base = POINTER_TO_PHYSICAL_ADDRESS(loaded_image->ImageBase) + addrs[SECTION_LINUX];

        initrd_size = szs[SECTION_INITRD];
        initrd_base = initrd_size != 0 ? POINTER_TO_PHYSICAL_ADDRESS(loaded_image->ImageBase) + addrs[SECTION_INITRD] : 0;

        dt_size = szs[SECTION_DTB];
        dt_base = dt_size != 0 ? POINTER_TO_PHYSICAL_ADDRESS(loaded_image->ImageBase) + addrs[SECTION_DTB] : 0;

        if (credential_initrd || sysext_initrd) {
                /* If we have generated initrds dynamically, let's combine them with the built-in initrd. */
                err = combine_initrd(
                                initrd_base, initrd_size,
                                credential_initrd, credential_initrd_size,
                                sysext_initrd, sysext_initrd_size,
                                &initrd_base, &initrd_size);
                if (EFI_ERROR(err))
                        return err;

                /* Given these might be large let's free them explicitly, quickly. */
                if (credential_initrd) {
                        FreePool(credential_initrd);
                        credential_initrd = NULL;
                }

                if (sysext_initrd) {
                        FreePool(sysext_initrd);
                        sysext_initrd = NULL;
                }
        }

        if (dt_size > 0) {
                err = devicetree_install_from_memory(
                                &dt_state, PHYSICAL_ADDRESS_TO_POINTER(dt_base), dt_size);
                if (EFI_ERROR(err))
                        log_error_stall(L"Error loading embedded devicetree: %r", err);
        }

        err = linux_exec(image, cmdline, cmdline_len,
                         PHYSICAL_ADDRESS_TO_POINTER(linux_base), linux_size,
                         PHYSICAL_ADDRESS_TO_POINTER(initrd_base), initrd_size);
        graphics_mode(FALSE);
        return log_error_status_stall(err, L"Execution of embedded linux image failed: %r", err);
}
Commit	Line	Data
db9ecf05	1	/* SPDX-License-Identifier: LGPL-2.1-or-later */
0fa2cac4 KS	2
	3	#include <efi.h>
	4	#include <efilib.h>
	5
845707aa	6	#include "cpio.h"
33bc9b75	7	#include "devicetree.h"
8110e144	8	#include "disk.h"
37fa3690	9	#include "graphics.h"
0fa2cac4	10	#include "linux.h"
d4cbada2 MG	11	#include "measure.h"
d4cbada2 MG	12	#include "pe.h"
ce0f078f	13	#include "secure-boot.h"
cf0fbc49 TA	14	#include "splash.h"
cf0fbc49 TA	15	#include "util.h"
0fa2cac4 KS	16
0fa2cac4 KS	17	/* magic string to find in the binary image */
2ccd5986	18	_used_ _section_(".sdmagic") static const char magic[] = "#### LoaderInfo: systemd-stub " GIT_VERSION " ####";
0fa2cac4	19
845707aa LP	20	static EFI_STATUS combine_initrd(
845707aa LP	21	EFI_PHYSICAL_ADDRESS initrd_base, UINTN initrd_size,
70cd15e9 JJ	22	const void *credential_initrd, UINTN credential_initrd_size,
70cd15e9 JJ	23	const void *sysext_initrd, UINTN sysext_initrd_size,
845707aa LP	24	EFI_PHYSICAL_ADDRESS ret_initrd_base, UINTN ret_initrd_size) {
	25
	26	EFI_PHYSICAL_ADDRESS base = UINT32_MAX; /* allocate an area below the 32bit boundary for this */
	27	EFI_STATUS err;
	28	UINT8 *p;
	29	UINTN n;
	30
	31	assert(ret_initrd_base);
	32	assert(ret_initrd_size);
	33
	34	/* Combines three initrds into one, by simple concatenation in memory */
	35
	36	n = ALIGN_TO(initrd_size, 4); /* main initrd might not be padded yet */
	37	if (credential_initrd) {
	38	if (n > UINTN_MAX - credential_initrd_size)
	39	return EFI_OUT_OF_RESOURCES;
	40
	41	n += credential_initrd_size;
	42	}
	43	if (sysext_initrd) {
	44	if (n > UINTN_MAX - sysext_initrd_size)
	45	return EFI_OUT_OF_RESOURCES;
	46
	47	n += sysext_initrd_size;
	48	}
	49
12f32748	50	err = BS->AllocatePages(
845707aa LP	51	AllocateMaxAddress,
	52	EfiLoaderData,
	53	EFI_SIZE_TO_PAGES(n),
	54	&base);
	55	if (EFI_ERROR(err))
	56	return log_error_status_stall(err, L"Failed to allocate space for combined initrd: %r", err);
	57
a0a644be	58	p = PHYSICAL_ADDRESS_TO_POINTER(base);
845707aa LP	59	if (initrd_base != 0) {
	60	UINTN pad;
	61
	62	/* Order matters, the real initrd must come first, since it might include microcode updates
	63	* which the kernel only looks for in the first cpio archive */
a0a644be	64	CopyMem(p, PHYSICAL_ADDRESS_TO_POINTER(initrd_base), initrd_size);
845707aa LP	65	p += initrd_size;
	66
	67	pad = ALIGN_TO(initrd_size, 4) - initrd_size;
	68	if (pad > 0) {
	69	ZeroMem(p, pad);
	70	p += pad;
	71	}
	72	}
	73
	74	if (credential_initrd) {
	75	CopyMem(p, credential_initrd, credential_initrd_size);
	76	p += credential_initrd_size;
	77	}
	78
	79	if (sysext_initrd) {
	80	CopyMem(p, sysext_initrd, sysext_initrd_size);
	81	p += sysext_initrd_size;
	82	}
	83
a0a644be	84	assert((UINT8*) PHYSICAL_ADDRESS_TO_POINTER(base) + n == p);
845707aa LP	85
	86	*ret_initrd_base = base;
	87	*ret_initrd_size = n;
	88
	89	return EFI_SUCCESS;
	90	}
	91
70cd15e9	92	static void export_variables(EFI_LOADED_IMAGE *loaded_image) {
5a186322 LP	93	CHAR16 uuid[37];
	94
	95	assert(loaded_image);
	96
	97	/* Export the device path this image is started from, if it's not set yet */
	98	if (efivar_get_raw(LOADER_GUID, L"LoaderDevicePartUUID", NULL, NULL) != EFI_SUCCESS)
	99	if (disk_get_part_uuid(loaded_image->DeviceHandle, uuid) == EFI_SUCCESS)
	100	efivar_set(LOADER_GUID, L"LoaderDevicePartUUID", uuid, 0);
	101
	102	/* If LoaderImageIdentifier is not set, assume the image with this stub was loaded directly from the
	103	* UEFI firmware without any boot loader, and hence set the LoaderImageIdentifier ourselves. Note
	104	* that some boot chain loaders neither set LoaderImageIdentifier nor make FilePath available to us,
	105	* in which case there's simple nothing to set for us. (The UEFI spec doesn't really say who's wrong
	106	* here, i.e. whether FilePath may be NULL or not, hence handle this gracefully and check if FilePath
	107	* is non-NULL explicitly.) */
	108	if (efivar_get_raw(LOADER_GUID, L"LoaderImageIdentifier", NULL, NULL) != EFI_SUCCESS &&
	109	loaded_image->FilePath) {
	110	_cleanup_freepool_ CHAR16 *s = NULL;
	111
	112	s = DevicePathToStr(loaded_image->FilePath);
9f048123 JJ	113	if (s)
	114	efivar_set(LOADER_GUID, L"LoaderImageIdentifier", s, 0);
	115	else
	116	log_oom();
5a186322 LP	117	}
	118
	119	/* if LoaderFirmwareInfo is not set, let's set it */
	120	if (efivar_get_raw(LOADER_GUID, L"LoaderFirmwareInfo", NULL, NULL) != EFI_SUCCESS) {
	121	_cleanup_freepool_ CHAR16 *s = NULL;
	122
	123	s = PoolPrint(L"%s %d.%02d", ST->FirmwareVendor, ST->FirmwareRevision >> 16, ST->FirmwareRevision & 0xffff);
9f048123 JJ	124	if (s)
	125	efivar_set(LOADER_GUID, L"LoaderFirmwareInfo", s, 0);
	126	else
	127	log_oom();
5a186322 LP	128	}
	129
	130	/* ditto for LoaderFirmwareType */
	131	if (efivar_get_raw(LOADER_GUID, L"LoaderFirmwareType", NULL, NULL) != EFI_SUCCESS) {
	132	_cleanup_freepool_ CHAR16 *s = NULL;
	133
	134	s = PoolPrint(L"UEFI %d.%02d", ST->Hdr.Revision >> 16, ST->Hdr.Revision & 0xffff);
9f048123 JJ	135	if (s)
	136	efivar_set(LOADER_GUID, L"LoaderFirmwareType", s, 0);
	137	else
	138	log_oom();
5a186322 LP	139	}
	140
	141	/* add StubInfo */
	142	if (efivar_get_raw(LOADER_GUID, L"StubInfo", NULL, NULL) != EFI_SUCCESS)
	143	efivar_set(LOADER_GUID, L"StubInfo", L"systemd-stub " GIT_VERSION, 0);
	144	}
	145
0fa2cac4	146	EFI_STATUS efi_main(EFI_HANDLE image, EFI_SYSTEM_TABLE *sys_table) {
e41d3d89 LP	147
	148	enum {
	149	SECTION_CMDLINE,
	150	SECTION_LINUX,
	151	SECTION_INITRD,
	152	SECTION_SPLASH,
33bc9b75	153	SECTION_DTB,
e41d3d89 LP	154	_SECTION_MAX,
	155	};
	156
	157	const CHAR8* const sections[] = {
	158	[SECTION_CMDLINE] = (const CHAR8*) ".cmdline",
	159	[SECTION_LINUX] = (const CHAR8*) ".linux",
	160	[SECTION_INITRD] = (const CHAR8*) ".initrd",
	161	[SECTION_SPLASH] = (const CHAR8*) ".splash",
33bc9b75	162	[SECTION_DTB] = (const CHAR8*) ".dtb",
e41d3d89	163	NULL,
0fa2cac4	164	};
5b5d365d	165
33bc9b75 MR	166	UINTN cmdline_len = 0, linux_size, initrd_size, dt_size;
33bc9b75 MR	167	UINTN credential_initrd_size = 0, sysext_initrd_size = 0;
70cd15e9	168	_cleanup_freepool_ void credential_initrd = NULL, sysext_initrd = NULL;
33bc9b75 MR	169	EFI_PHYSICAL_ADDRESS linux_base, initrd_base, dt_base;
33bc9b75 MR	170	_cleanup_(devicetree_cleanup) struct devicetree_state dt_state = {};
845707aa	171	EFI_LOADED_IMAGE *loaded_image;
e41d3d89 LP	172	UINTN addrs[_SECTION_MAX] = {};
e41d3d89 LP	173	UINTN szs[_SECTION_MAX] = {};
0fa2cac4	174	CHAR8 *cmdline = NULL;
0fa2cac4 KS	175	EFI_STATUS err;
	176
	177	InitializeLib(image, sys_table);
	178
12f32748 JJ	179	err = BS->OpenProtocol(
	180	image,
	181	&LoadedImageProtocol,
	182	(void **)&loaded_image,
	183	image,
	184	NULL,
	185	EFI_OPEN_PROTOCOL_GET_PROTOCOL);
8aba0eec JJ	186	if (EFI_ERROR(err))
8aba0eec JJ	187	return log_error_status_stall(err, L"Error getting a LoadedImageProtocol handle: %r", err);
0fa2cac4	188
e41d3d89	189	err = pe_memory_locate_sections(loaded_image->ImageBase, (const CHAR8**) sections, addrs, szs);
8aba0eec JJ	190	if (EFI_ERROR(err))
8aba0eec JJ	191	return log_error_status_stall(err, L"Unable to locate embedded .linux section: %r", err);
0fa2cac4	192
94b81afb	193	/* Show splash screen as early as possible */
6e161dc8	194	graphics_splash((const UINT8*) loaded_image->ImageBase + addrs[SECTION_SPLASH], szs[SECTION_SPLASH], NULL);
94b81afb	195
e41d3d89	196	if (szs[SECTION_CMDLINE] > 0) {
5b5d365d	197	cmdline = (CHAR8*) loaded_image->ImageBase + addrs[SECTION_CMDLINE];
e41d3d89 LP	198	cmdline_len = szs[SECTION_CMDLINE];
e41d3d89 LP	199	}
0fa2cac4	200
53a20455	201	/* if we are not in secure boot mode, or none was provided, accept a custom command line and replace the built-in one */
ce0f078f DDM	202	if ((!secure_boot_enabled() \|\| cmdline_len == 0) && loaded_image->LoadOptionsSize > 0 &&
ce0f078f DDM	203	(CHAR16 ) loaded_image->LoadOptions > 0x1F) {
0fa2cac4 KS	204	CHAR16 *options;
0fa2cac4 KS	205	CHAR8 *line;
0fa2cac4 KS	206
	207	options = (CHAR16 *)loaded_image->LoadOptions;
	208	cmdline_len = (loaded_image->LoadOptionsSize / sizeof(CHAR16)) * sizeof(CHAR8);
	209	line = AllocatePool(cmdline_len);
9f048123 JJ	210	if (!line)
	211	return log_oom();
	212
258f0970	213	for (UINTN i = 0; i < cmdline_len; i++)
0fa2cac4 KS	214	line[i] = options[i];
0fa2cac4 KS	215	cmdline = line;
92ed3bb4	216
e6e24af5 LP	217	/* Let's measure the passed kernel command line into the TPM. Note that this possibly
	218	* duplicates what we already did in the boot menu, if that was already used. However, since
	219	* we want the boot menu to support an EFI binary, and want to this stub to be usable from
	220	* any boot menu, let's measure things anyway. */
70cd15e9	221	(void) tpm_log_load_options(loaded_image->LoadOptions);
0fa2cac4 KS	222	}
0fa2cac4 KS	223
5a186322	224	export_variables(loaded_image);
1aa15def	225
70cd15e9	226	(void) pack_cpio(loaded_image,
845707aa LP	227	L".cred",
	228	(const CHAR8*) ".extra/credentials",
	229	/* dir_mode= */ 0500,
	230	/* access_mode= */ 0400,
	231	/* tpm_pcr= */ TPM_PCR_INDEX_KERNEL_PARAMETERS,
	232	L"Credentials initrd",
	233	&credential_initrd,
	234	&credential_initrd_size);
	235
70cd15e9	236	(void) pack_cpio(loaded_image,
845707aa LP	237	L".raw",
	238	(const CHAR8*) ".extra/sysext",
	239	/* dir_mode= */ 0555,
	240	/* access_mode= */ 0444,
	241	/* tpm_pcr= */ TPM_PCR_INDEX_INITRD,
	242	L"System extension initrd",
	243	&sysext_initrd,
	244	&sysext_initrd_size);
	245
dc467928	246	linux_size = szs[SECTION_LINUX];
a0a644be	247	linux_base = POINTER_TO_PHYSICAL_ADDRESS(loaded_image->ImageBase) + addrs[SECTION_LINUX];
5b5d365d LP	248
5b5d365d LP	249	initrd_size = szs[SECTION_INITRD];
a0a644be	250	initrd_base = initrd_size != 0 ? POINTER_TO_PHYSICAL_ADDRESS(loaded_image->ImageBase) + addrs[SECTION_INITRD] : 0;
37fa3690	251
33bc9b75 MR	252	dt_size = szs[SECTION_DTB];
	253	dt_base = dt_size != 0 ? POINTER_TO_PHYSICAL_ADDRESS(loaded_image->ImageBase) + addrs[SECTION_DTB] : 0;
	254
845707aa LP	255	if (credential_initrd \|\| sysext_initrd) {
	256	/* If we have generated initrds dynamically, let's combine them with the built-in initrd. */
	257	err = combine_initrd(
	258	initrd_base, initrd_size,
	259	credential_initrd, credential_initrd_size,
	260	sysext_initrd, sysext_initrd_size,
	261	&initrd_base, &initrd_size);
	262	if (EFI_ERROR(err))
	263	return err;
	264
	265	/* Given these might be large let's free them explicitly, quickly. */
	266	if (credential_initrd) {
	267	FreePool(credential_initrd);
	268	credential_initrd = NULL;
	269	}
	270
	271	if (sysext_initrd) {
	272	FreePool(sysext_initrd);
	273	sysext_initrd = NULL;
	274	}
	275	}
0fa2cac4	276
33bc9b75 MR	277	if (dt_size > 0) {
	278	err = devicetree_install_from_memory(
	279	&dt_state, PHYSICAL_ADDRESS_TO_POINTER(dt_base), dt_size);
	280	if (EFI_ERROR(err))
	281	log_error_stall(L"Error loading embedded devicetree: %r", err);
	282	}
	283
a6089431	284	err = linux_exec(image, cmdline, cmdline_len,
dc467928	285	PHYSICAL_ADDRESS_TO_POINTER(linux_base), linux_size,
a6089431	286	PHYSICAL_ADDRESS_TO_POINTER(initrd_base), initrd_size);
37fa3690	287	graphics_mode(FALSE);
8aba0eec	288	return log_error_status_stall(err, L"Execution of embedded linux image failed: %r", err);
0fa2cac4	289	}