I'm sorry, Ning. I'm not sure what went wrong.
I've attached the patch again below. It applies to Changeset 451 (356ad4b1d363).
I generated the patch using the command "hg diff -apU 3 >
../tboot-16-06-2016.patch".
I was able to apply the patch from the tboot source directory using the command
"patch -p 1 < ../tboot-16-06-2016.patch".
Please let me know if this works
******************** PATCH STARTS BELOW THIS LINE ******************************
diff -r 356ad4b1d363 tboot/common/elf.c
--- a/tboot/common/elf.c Thu Jun 09 10:53:29 2016 -0700
+++ b/tboot/common/elf.c Thu Jun 16 09:07:21 2016 -0400
@@ -145,9 +145,7 @@ bool is_elf_image(const void *image, siz
return false;
}
-#if 0
-static bool get_elf_image_range(const elf_header_t *elf, void **start,
- void **end)
+bool get_elf_image_range(const elf_header_t *elf, void **start, void **end)
{
uint32_t u_start, u_end;
@@ -188,7 +186,6 @@ static bool get_elf_image_range(const el
return true;
}
}
-#endif
bool expand_elf_image(const void *image, void **entry_point)
{
diff -r 356ad4b1d363 tboot/common/loader.c
--- a/tboot/common/loader.c Thu Jun 09 10:53:29 2016 -0700
+++ b/tboot/common/loader.c Thu Jun 16 09:07:21 2016 -0400
@@ -3,6 +3,7 @@
* binaries
*
* Copyright (c) 2006-2013, Intel Corporation
+ * Copyright (c) 2016 Real-Time Systems GmbH
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
@@ -64,7 +65,7 @@ extern tboot_shared_t _tboot_shared;
/* multiboot struct saved so that post_launch() can use it (in tboot.c) */
extern loader_ctx *g_ldr_ctx;
-
+extern bool get_elf_image_range(const elf_header_t *elf, void **start, void
**end);
extern bool is_elf_image(const void *image, size_t size);
extern bool expand_elf_image(const elf_header_t *elf, void **entry_point);
extern bool expand_linux_image(const void *linux_image, size_t linux_size,
@@ -769,6 +770,98 @@ unsigned long get_mbi_mem_end_mb1(const
return PAGE_UP(end);
}
+/*
+ * Move all mbi components/modules/mbi to end of memory
+ */
+static bool move_modules_to_high_memory(loader_ctx *lctx)
+{
+ uint64_t max_ram_base = 0,
+ max_ram_size = 0;
+ uint32_t memRequired = 0;
+
+ uint32_t module_count = get_module_count(lctx);
+
+ for ( unsigned int i = 0; i < module_count; i++ )
+ {
+ module_t *m = get_module(lctx,i);
+ memRequired += PAGE_UP(m->mod_end - m->mod_start);
+ }
+
+ get_highest_sized_ram(memRequired, 0x100000000ULL, &max_ram_base,
&max_ram_size);
+ if(!max_ram_base || !max_ram_size)
+ {
+ printk(TBOOT_INFO"ERROR No suitable memory area found for image
relocation!\n");
+ printk(TBOOT_INFO"required 0x%X\n", memRequired);
+ return false;
+ }
+
+ printk(TBOOT_INFO"highest suitable area @ 0x%llX (size 0x%llX)\n",
max_ram_base, max_ram_size);
+
+ unsigned long target_addr = PAGE_DOWN(max_ram_base + max_ram_size);
+
+ for ( unsigned int i = 0; i < module_count; i++ )
+ {
+ unsigned long base, size;
+ module_t *m = get_module(lctx,i);
+ base = m->mod_start;
+ size = m->mod_end - m->mod_start;
+ printk(TBOOT_INFO"moving module %u (%lu bytes) from 0x%08X ", i, size,
(uint32_t)base);
+
+ //calculate target addresses
+ target_addr = PAGE_DOWN(target_addr - size);
+ printk(TBOOT_INFO"to 0x%08X\n", (uint32_t)target_addr);
+
+ memcpy((void *)target_addr, (void *)base, size);
+ m->mod_start = target_addr;
+ m->mod_end = target_addr + size;
+ }
+
+ return true;
+}
+
+/*
+ * Move any mbi components/modules/mbi that just above the kernel
+ */
+static bool move_modules_above_elf_kernel(loader_ctx *lctx, elf_header_t
*kernel_image)
+{
+ if (LOADER_CTX_BAD(lctx))
+ return false;
+
+ /* get end address of loaded elf image */
+ void *elf_start=NULL, *elf_end=NULL;
+ if ( !get_elf_image_range(kernel_image, &elf_start, &elf_end) )
+ {
+ printk(TBOOT_INFO"ERROR: failed tget elf image range\n");
+ }
+
+ printk(TBOOT_INFO"ELF kernel top is at 0x%X\n", (uint32_t)elf_end);
+
+ /* keep modules page aligned */
+ uint32_t target_addr = PAGE_UP((uint32_t)elf_end);
+
+ uint32_t module_count = get_module_count(lctx);
+
+ for ( unsigned int i = 0; i < module_count; i++ )
+ {
+ unsigned long base, size;
+ module_t *m = get_module(lctx,i);
+ base = m->mod_start;
+ size = m->mod_end - m->mod_start;
+ printk(TBOOT_INFO"moving module %u (%lu bytes) from 0x%08X ", i, size,
(uint32_t)base);
+
+ //calculate target addresses
+ printk(TBOOT_INFO"to 0x%08X\n", (uint32_t)target_addr);
+
+ memcpy((void *)target_addr, (void *)base, size);
+ m->mod_start = target_addr;
+ m->mod_end = target_addr + size;
+
+ target_addr = PAGE_UP(target_addr + size);
+ }
+
+ return true;
+}
+
static void fixup_modules(loader_ctx *lctx, size_t offset)
{
unsigned int module_count = get_module_count(lctx);
@@ -1244,6 +1337,11 @@ bool launch_kernel(bool is_measured_laun
/* fix for GRUB2, which may load modules into memory before tboot */
move_modules(g_ldr_ctx);
+
+ /* move modules out of the way (to top og memory below 4G) */
+ printk(TBOOT_INFO"move modules to high memory\n");
+ if(!move_modules_to_high_memory(g_ldr_ctx))
+ return false;
}
else {
printk(TBOOT_INFO"assuming kernel is Linux format\n");
@@ -1262,6 +1360,11 @@ bool launch_kernel(bool is_measured_laun
if ( !expand_elf_image((elf_header_t *)kernel_image,
&kernel_entry_point) )
return false;
+
+ /* move modules on top of expanded kernel */
+ if(!move_modules_above_elf_kernel(g_ldr_ctx, (elf_header_t
*)kernel_image))
+ return false;
+
printk(TBOOT_INFO"transfering control to kernel @%p...\n",
kernel_entry_point);
/* (optionally) pause when transferring to kernel */
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