commit e2b258cd4acb60b7cdc33d11be55f76b7b15c8d8
author Maxim Moskalets <maximmosk4@gmail.com> Fri Jun 21 14:42:10 2024 +0300
committer Tom Rini <trini@konsulko.com> Fri Jul 05 13:57:02 2024 -0600
tree 612aeafd93a130757d8f41ea86dc3020fc2ce133
parent 907ee6a15c2e0872ee875c1ce40f8f7a14160577

cmd: bootm: add ELF file support

Some operating systems (e.g. seL4) and embedded applications are ELF
images. It is convenient to use FIT-images to implement trusted boot.
Added "elf" image type for booting using bootm command.

Signed-off-by: Maxim Moskalets <maximmosk4@gmail.com>

boot/bootm_os.c

diff --git a/boot/bootm_os.c b/boot/bootm_os.c
index 15297dd..6a66217 100644
--- a/boot/bootm_os.c
+++ b/boot/bootm_os.c
@@ -8,6 +8,7 @@
 #include <bootstage.h>
 #include <cpu_func.h>
 #include <efi_loader.h>
+#include <elf.h>
 #include <env.h>
 #include <fdt_support.h>
 #include <image.h>
@@ -394,6 +395,20 @@
 }
 #endif
 
+#if defined(CONFIG_BOOTM_ELF)
+static int do_bootm_elf(int flag, struct bootm_info *bmi)
+{
+	Bootelf_flags flags = { .autostart = 1 };
+
+	if (flag != BOOTM_STATE_OS_GO)
+		return 0;
+
+	bootelf(bmi->images->ep, flags, 0, NULL);
+
+	return 1;
+}
+#endif
+
 #ifdef CONFIG_INTEGRITY
 static int do_bootm_integrity(int flag, struct bootm_info *bmi)
 {
@@ -535,6 +550,9 @@
 #ifdef CONFIG_BOOTM_EFI
 	[IH_OS_EFI] = do_bootm_efi,
 #endif
+#if defined(CONFIG_BOOTM_ELF)
+	[IH_OS_ELF] = do_bootm_elf,
+#endif
 };
 
 /* Allow for arch specific config before we boot */

boot/image-fit.c

diff --git a/boot/image-fit.c b/boot/image-fit.c
index f6464bc..9253f81 100644
--- a/boot/image-fit.c
+++ b/boot/image-fit.c
@@ -2175,7 +2175,8 @@
 		fit_image_check_os(fit, noffset, IH_OS_TEE) ||
 		fit_image_check_os(fit, noffset, IH_OS_OPENRTOS) ||
 		fit_image_check_os(fit, noffset, IH_OS_EFI) ||
-		fit_image_check_os(fit, noffset, IH_OS_VXWORKS);
+		fit_image_check_os(fit, noffset, IH_OS_VXWORKS) ||
+		fit_image_check_os(fit, noffset, IH_OS_ELF);
 
 	/*
 	 * If either of the checks fail, we should report an error, but

boot/image.c

diff --git a/boot/image.c b/boot/image.c
index fc774d6..abac254 100644
--- a/boot/image.c
+++ b/boot/image.c
@@ -130,7 +130,10 @@
 	{	IH_OS_OPENRTOS,	"openrtos",	"OpenRTOS",		},
 #endif
 	{	IH_OS_OPENSBI,	"opensbi",	"RISC-V OpenSBI",	},
-	{	IH_OS_EFI,	"efi",		"EFI Firmware" },
+	{	IH_OS_EFI,	"efi",		"EFI Firmware"		},
+#ifdef CONFIG_BOOTM_ELF
+	{	IH_OS_ELF,	"elf",		"ELF Image"		},
+#endif
 
 	{	-1,		"",		"",			},
 };

cmd/Kconfig

diff --git a/cmd/Kconfig b/cmd/Kconfig
index 40ac5a8..68947bf 100644
--- a/cmd/Kconfig
+++ b/cmd/Kconfig
@@ -321,6 +321,13 @@
 	help
 	  Support booting UEFI FIT images via the bootm command.
 
+config BOOTM_ELF
+	bool "Support booting ELF images"
+	depends on CMD_BOOTM && LIB_ELF
+	default n
+	help
+	  Support booting ELF images via the bootm command.
+
 config CMD_BOOTZ
 	bool "bootz"
 	help

include/image.h

diff --git a/include/image.h b/include/image.h
index c5b288f..9daaee1 100644
--- a/include/image.h
+++ b/include/image.h
@@ -100,6 +100,7 @@
 	IH_OS_TEE,			/* Trusted Execution Environment */
 	IH_OS_OPENSBI,			/* RISC-V OpenSBI */
 	IH_OS_EFI,			/* EFI Firmware (e.g. GRUB2) */
+	IH_OS_ELF,			/* ELF Image (e.g. seL4) */
 
 	IH_OS_COUNT,
 };