|
|
a85e8e |
From 810bd23ca6d069506a4fb3a54921f743b1f1624f Mon Sep 17 00:00:00 2001
|
|
|
a85e8e |
From: Peter Jones <pjones@redhat.com>
|
|
|
a85e8e |
Date: Tue, 14 Feb 2017 16:18:54 -0500
|
|
|
a85e8e |
Subject: [PATCH 231/260] Handle multi-arch (64-on-32) boot in linuxefi loader.
|
|
|
a85e8e |
|
|
|
a85e8e |
Allow booting 64-bit kernels on 32-bit EFI on x86.
|
|
|
a85e8e |
|
|
|
a85e8e |
Signed-off-by: Peter Jones <pjones@redhat.com>
|
|
|
a85e8e |
---
|
|
|
a85e8e |
grub-core/loader/efi/linux.c | 9 +++-
|
|
|
a85e8e |
grub-core/loader/i386/efi/linux.c | 108 ++++++++++++++++++++++++++------------
|
|
|
a85e8e |
include/grub/i386/linux.h | 7 ++-
|
|
|
a85e8e |
3 files changed, 88 insertions(+), 36 deletions(-)
|
|
|
a85e8e |
|
|
|
a85e8e |
diff --git a/grub-core/loader/efi/linux.c b/grub-core/loader/efi/linux.c
|
|
|
a85e8e |
index dbf63e20e..7fe7201a3 100644
|
|
|
a85e8e |
--- a/grub-core/loader/efi/linux.c
|
|
|
a85e8e |
+++ b/grub-core/loader/efi/linux.c
|
|
|
a85e8e |
@@ -66,12 +66,17 @@ grub_linuxefi_secure_validate (void *data, grub_uint32_t size)
|
|
|
a85e8e |
typedef void (*handover_func) (void *, grub_efi_system_table_t *, void *);
|
|
|
a85e8e |
|
|
|
a85e8e |
grub_err_t
|
|
|
a85e8e |
-grub_efi_linux_boot (void *kernel_addr, grub_off_t offset,
|
|
|
a85e8e |
+grub_efi_linux_boot (void *kernel_addr, grub_off_t handover_offset,
|
|
|
a85e8e |
void *kernel_params)
|
|
|
a85e8e |
{
|
|
|
a85e8e |
handover_func hf;
|
|
|
a85e8e |
+ int offset = 0;
|
|
|
a85e8e |
|
|
|
a85e8e |
- hf = (handover_func)((char *)kernel_addr + offset);
|
|
|
a85e8e |
+#ifdef __x86_64__
|
|
|
a85e8e |
+ offset = 512;
|
|
|
a85e8e |
+#endif
|
|
|
a85e8e |
+
|
|
|
a85e8e |
+ hf = (handover_func)((char *)kernel_addr + handover_offset + offset);
|
|
|
a85e8e |
hf (grub_efi_image_handle, grub_efi_system_table, kernel_params);
|
|
|
a85e8e |
|
|
|
a85e8e |
return GRUB_ERR_BUG;
|
|
|
a85e8e |
diff --git a/grub-core/loader/i386/efi/linux.c b/grub-core/loader/i386/efi/linux.c
|
|
|
a85e8e |
index 806031838..52dc71903 100644
|
|
|
a85e8e |
--- a/grub-core/loader/i386/efi/linux.c
|
|
|
a85e8e |
+++ b/grub-core/loader/i386/efi/linux.c
|
|
|
a85e8e |
@@ -44,14 +44,10 @@ static char *linux_cmdline;
|
|
|
a85e8e |
static grub_err_t
|
|
|
a85e8e |
grub_linuxefi_boot (void)
|
|
|
a85e8e |
{
|
|
|
a85e8e |
- int offset = 0;
|
|
|
a85e8e |
-
|
|
|
a85e8e |
-#ifdef __x86_64__
|
|
|
a85e8e |
- offset = 512;
|
|
|
a85e8e |
-#endif
|
|
|
a85e8e |
asm volatile ("cli");
|
|
|
a85e8e |
|
|
|
a85e8e |
- return grub_efi_linux_boot ((char *)kernel_mem, handover_offset + offset,
|
|
|
a85e8e |
+ return grub_efi_linux_boot ((char *)kernel_mem,
|
|
|
a85e8e |
+ handover_offset,
|
|
|
a85e8e |
params);
|
|
|
a85e8e |
}
|
|
|
a85e8e |
|
|
|
a85e8e |
@@ -155,14 +151,20 @@ grub_cmd_initrd (grub_command_t cmd __attribute__ ((unused)),
|
|
|
a85e8e |
return grub_errno;
|
|
|
a85e8e |
}
|
|
|
a85e8e |
|
|
|
a85e8e |
+#define MIN(a, b) \
|
|
|
a85e8e |
+ ({ typeof (a) _a = (a); \
|
|
|
a85e8e |
+ typeof (b) _b = (b); \
|
|
|
a85e8e |
+ _a < _b ? _a : _b; })
|
|
|
a85e8e |
+
|
|
|
a85e8e |
static grub_err_t
|
|
|
a85e8e |
grub_cmd_linux (grub_command_t cmd __attribute__ ((unused)),
|
|
|
a85e8e |
int argc, char *argv[])
|
|
|
a85e8e |
{
|
|
|
a85e8e |
grub_file_t file = 0;
|
|
|
a85e8e |
- struct linux_kernel_header lh;
|
|
|
a85e8e |
+ struct linux_kernel_header *lh;
|
|
|
a85e8e |
grub_ssize_t len, start, filelen;
|
|
|
a85e8e |
void *kernel = NULL;
|
|
|
a85e8e |
+ int setup_header_end_offset;
|
|
|
a85e8e |
int rc;
|
|
|
a85e8e |
|
|
|
a85e8e |
grub_dl_ref (my_mod);
|
|
|
a85e8e |
@@ -202,47 +204,78 @@ grub_cmd_linux (grub_command_t cmd __attribute__ ((unused)),
|
|
|
a85e8e |
goto fail;
|
|
|
a85e8e |
}
|
|
|
a85e8e |
|
|
|
a85e8e |
- params = grub_efi_allocate_pages_max (0x3fffffff, BYTES_TO_PAGES(16384));
|
|
|
a85e8e |
-
|
|
|
a85e8e |
+ params = grub_efi_allocate_pages_max (0x3fffffff,
|
|
|
a85e8e |
+ BYTES_TO_PAGES(sizeof(*params)));
|
|
|
a85e8e |
if (! params)
|
|
|
a85e8e |
{
|
|
|
a85e8e |
grub_error (GRUB_ERR_OUT_OF_MEMORY, "cannot allocate kernel parameters");
|
|
|
a85e8e |
goto fail;
|
|
|
a85e8e |
}
|
|
|
a85e8e |
|
|
|
a85e8e |
- grub_dprintf ("linuxefi", "params = %lx\n", (unsigned long) params);
|
|
|
a85e8e |
-
|
|
|
a85e8e |
- grub_memset (params, 0, 16384);
|
|
|
a85e8e |
-
|
|
|
a85e8e |
- grub_memcpy (&lh, kernel, sizeof (lh));
|
|
|
a85e8e |
-
|
|
|
a85e8e |
- if (lh.boot_flag != grub_cpu_to_le16 (0xaa55))
|
|
|
a85e8e |
+ grub_dprintf ("linuxefi", "params = %p\n", (unsigned long) params);
|
|
|
a85e8e |
+
|
|
|
a85e8e |
+ grub_memset (params, 0, sizeof(*params));
|
|
|
a85e8e |
+
|
|
|
a85e8e |
+ setup_header_end_offset = *((grub_uint8_t *)kernel + 0x201);
|
|
|
a85e8e |
+ grub_dprintf ("linuxefi", "copying %d bytes from %p to %p\n",
|
|
|
a85e8e |
+ MIN(0x202+setup_header_end_offset,sizeof (*params)) - 0x1f1,
|
|
|
a85e8e |
+ (grub_uint8_t *)kernel + 0x1f1,
|
|
|
a85e8e |
+ (grub_uint8_t *)params + 0x1f1);
|
|
|
a85e8e |
+ grub_memcpy ((grub_uint8_t *)params + 0x1f1,
|
|
|
a85e8e |
+ (grub_uint8_t *)kernel + 0x1f1,
|
|
|
a85e8e |
+ MIN(0x202+setup_header_end_offset,sizeof (*params)) - 0x1f1);
|
|
|
a85e8e |
+ lh = (struct linux_kernel_header *)params;
|
|
|
a85e8e |
+ grub_dprintf ("linuxefi", "lh is at %p\n", lh);
|
|
|
a85e8e |
+ grub_dprintf ("linuxefi", "checking lh->boot_flag\n");
|
|
|
a85e8e |
+ if (lh->boot_flag != grub_cpu_to_le16 (0xaa55))
|
|
|
a85e8e |
{
|
|
|
a85e8e |
grub_error (GRUB_ERR_BAD_OS, N_("invalid magic number"));
|
|
|
a85e8e |
goto fail;
|
|
|
a85e8e |
}
|
|
|
a85e8e |
|
|
|
a85e8e |
- if (lh.setup_sects > GRUB_LINUX_MAX_SETUP_SECTS)
|
|
|
a85e8e |
+ grub_dprintf ("linuxefi", "checking lh->setup_sects\n");
|
|
|
a85e8e |
+ if (lh->setup_sects > GRUB_LINUX_MAX_SETUP_SECTS)
|
|
|
a85e8e |
{
|
|
|
a85e8e |
grub_error (GRUB_ERR_BAD_OS, N_("too many setup sectors"));
|
|
|
a85e8e |
goto fail;
|
|
|
a85e8e |
}
|
|
|
a85e8e |
|
|
|
a85e8e |
- if (lh.version < grub_cpu_to_le16 (0x020b))
|
|
|
a85e8e |
+ grub_dprintf ("linuxefi", "checking lh->version\n");
|
|
|
a85e8e |
+ if (lh->version < grub_cpu_to_le16 (0x020b))
|
|
|
a85e8e |
{
|
|
|
a85e8e |
grub_error (GRUB_ERR_BAD_OS, N_("kernel too old"));
|
|
|
a85e8e |
goto fail;
|
|
|
a85e8e |
}
|
|
|
a85e8e |
|
|
|
a85e8e |
- if (!lh.handover_offset)
|
|
|
a85e8e |
+ grub_dprintf ("linuxefi", "checking lh->handover_offset\n");
|
|
|
a85e8e |
+ if (!lh->handover_offset)
|
|
|
a85e8e |
{
|
|
|
a85e8e |
grub_error (GRUB_ERR_BAD_OS, N_("kernel doesn't support EFI handover"));
|
|
|
a85e8e |
goto fail;
|
|
|
a85e8e |
}
|
|
|
a85e8e |
|
|
|
a85e8e |
- linux_cmdline = grub_efi_allocate_pages_max(0x3fffffff,
|
|
|
a85e8e |
- BYTES_TO_PAGES(lh.cmdline_size + 1));
|
|
|
a85e8e |
+#ifdef defined(__x86_64__) || defined(__aarch64__)
|
|
|
a85e8e |
+ grub_dprintf ("linuxefi", "checking lh->xloadflags\n");
|
|
|
a85e8e |
+ if (!(lh->xloadflags & LINUX_XLF_KERNEL_64))
|
|
|
a85e8e |
+ {
|
|
|
a85e8e |
+ grub_error (GRUB_ERR_BAD_OS, N_("kernel doesn't support 64-bit CPUs"));
|
|
|
a85e8e |
+ goto fail;
|
|
|
a85e8e |
+ }
|
|
|
a85e8e |
+#endif
|
|
|
a85e8e |
+
|
|
|
a85e8e |
+#if defined(__i386__)
|
|
|
a85e8e |
+ if ((lh->xloadflags & LINUX_XLF_KERNEL_64) &&
|
|
|
a85e8e |
+ !(lh->xloadflags & LINUX_XLF_EFI_HANDOVER_32))
|
|
|
a85e8e |
+ {
|
|
|
a85e8e |
+ grub_error (GRUB_ERR_BAD_OS,
|
|
|
a85e8e |
+ N_("kernel doesn't support 32-bit handover"));
|
|
|
a85e8e |
+ goto fail;
|
|
|
a85e8e |
+ }
|
|
|
a85e8e |
+#endif
|
|
|
a85e8e |
|
|
|
a85e8e |
+ grub_dprintf ("linuxefi", "setting up cmdline\n");
|
|
|
a85e8e |
+ linux_cmdline = grub_efi_allocate_pages_max(0x3fffffff,
|
|
|
a85e8e |
+ BYTES_TO_PAGES(lh->cmdline_size + 1));
|
|
|
a85e8e |
if (!linux_cmdline)
|
|
|
a85e8e |
{
|
|
|
a85e8e |
grub_error (GRUB_ERR_OUT_OF_MEMORY, N_("can't allocate cmdline"));
|
|
|
a85e8e |
@@ -255,21 +288,23 @@ grub_cmd_linux (grub_command_t cmd __attribute__ ((unused)),
|
|
|
a85e8e |
grub_memcpy (linux_cmdline, LINUX_IMAGE, sizeof (LINUX_IMAGE));
|
|
|
a85e8e |
grub_create_loader_cmdline (argc, argv,
|
|
|
a85e8e |
linux_cmdline + sizeof (LINUX_IMAGE) - 1,
|
|
|
a85e8e |
- lh.cmdline_size - (sizeof (LINUX_IMAGE) - 1));
|
|
|
a85e8e |
+ lh->cmdline_size - (sizeof (LINUX_IMAGE) - 1));
|
|
|
a85e8e |
|
|
|
a85e8e |
- lh.cmd_line_ptr = (grub_uint32_t)(grub_addr_t)linux_cmdline;
|
|
|
a85e8e |
+ grub_dprintf ("linuxefi", "setting lh->cmd_line_ptr\n");
|
|
|
a85e8e |
+ lh->cmd_line_ptr = (grub_uint32_t)(grub_addr_t)linux_cmdline;
|
|
|
a85e8e |
|
|
|
a85e8e |
- handover_offset = lh.handover_offset;
|
|
|
a85e8e |
+ grub_dprintf ("linuxefi", "computing handover offset\n");
|
|
|
a85e8e |
+ handover_offset = lh->handover_offset;
|
|
|
a85e8e |
|
|
|
a85e8e |
- start = (lh.setup_sects + 1) * 512;
|
|
|
a85e8e |
+ start = (lh->setup_sects + 1) * 512;
|
|
|
a85e8e |
len = grub_file_size(file) - start;
|
|
|
a85e8e |
|
|
|
a85e8e |
- kernel_mem = grub_efi_allocate_pages(lh.pref_address,
|
|
|
a85e8e |
- BYTES_TO_PAGES(lh.init_size));
|
|
|
a85e8e |
+ kernel_mem = grub_efi_allocate_pages(lh->pref_address,
|
|
|
a85e8e |
+ BYTES_TO_PAGES(lh->init_size));
|
|
|
a85e8e |
|
|
|
a85e8e |
if (!kernel_mem)
|
|
|
a85e8e |
kernel_mem = grub_efi_allocate_pages_max(0x3fffffff,
|
|
|
a85e8e |
- BYTES_TO_PAGES(lh.init_size));
|
|
|
a85e8e |
+ BYTES_TO_PAGES(lh->init_size));
|
|
|
a85e8e |
|
|
|
a85e8e |
if (!kernel_mem)
|
|
|
a85e8e |
{
|
|
|
a85e8e |
@@ -277,14 +312,21 @@ grub_cmd_linux (grub_command_t cmd __attribute__ ((unused)),
|
|
|
a85e8e |
goto fail;
|
|
|
a85e8e |
}
|
|
|
a85e8e |
|
|
|
a85e8e |
- grub_memcpy (kernel_mem, (char *)kernel + start, len);
|
|
|
a85e8e |
+ grub_dprintf ("linuxefi", "kernel_mem = %lx\n", (unsigned long) kernel_mem);
|
|
|
a85e8e |
+
|
|
|
a85e8e |
grub_loader_set (grub_linuxefi_boot, grub_linuxefi_unload, 0);
|
|
|
a85e8e |
loaded=1;
|
|
|
a85e8e |
+ grub_dprintf ("linuxefi", "setting lh->code32_start to %p\n", kernel_mem);
|
|
|
a85e8e |
+ lh->code32_start = (grub_uint32_t)(grub_addr_t) kernel_mem;
|
|
|
a85e8e |
+
|
|
|
a85e8e |
+ grub_memcpy (kernel_mem, (char *)kernel + start, filelen - start);
|
|
|
a85e8e |
|
|
|
a85e8e |
- lh.code32_start = (grub_uint32_t)(grub_uint64_t) kernel_mem;
|
|
|
a85e8e |
- grub_memcpy (params, &lh, 2 * 512);
|
|
|
a85e8e |
+ grub_dprintf ("linuxefi", "setting lh->type_of_loader\n");
|
|
|
a85e8e |
+ lh->type_of_loader = 0x6;
|
|
|
a85e8e |
|
|
|
a85e8e |
- params->type_of_loader = 0x21;
|
|
|
a85e8e |
+ grub_dprintf ("linuxefi", "setting lh->ext_loader_{type,ver}\n");
|
|
|
a85e8e |
+ params->ext_loader_type = 0;
|
|
|
a85e8e |
+ params->ext_loader_ver = 2;
|
|
|
a85e8e |
grub_dprintf("linuxefi", "kernel_mem: %p handover_offset: %08x\n",
|
|
|
a85e8e |
kernel_mem, handover_offset);
|
|
|
a85e8e |
|
|
|
a85e8e |
@@ -304,7 +346,7 @@ grub_cmd_linux (grub_command_t cmd __attribute__ ((unused)),
|
|
|
a85e8e |
if (linux_cmdline && !loaded)
|
|
|
a85e8e |
grub_efi_free_pages ((grub_efi_physical_address_t)(grub_addr_t)
|
|
|
a85e8e |
linux_cmdline,
|
|
|
a85e8e |
- BYTES_TO_PAGES(lh.cmdline_size + 1));
|
|
|
a85e8e |
+ BYTES_TO_PAGES(lh->cmdline_size + 1));
|
|
|
a85e8e |
|
|
|
a85e8e |
if (kernel_mem && !loaded)
|
|
|
a85e8e |
grub_efi_free_pages ((grub_efi_physical_address_t)(grub_addr_t)kernel_mem,
|
|
|
a85e8e |
diff --git a/include/grub/i386/linux.h b/include/grub/i386/linux.h
|
|
|
a85e8e |
index fc36bdaf3..110ecf806 100644
|
|
|
a85e8e |
--- a/include/grub/i386/linux.h
|
|
|
a85e8e |
+++ b/include/grub/i386/linux.h
|
|
|
a85e8e |
@@ -130,7 +130,12 @@ struct linux_kernel_header
|
|
|
a85e8e |
grub_uint32_t kernel_alignment;
|
|
|
a85e8e |
grub_uint8_t relocatable;
|
|
|
a85e8e |
grub_uint8_t min_alignment;
|
|
|
a85e8e |
- grub_uint8_t pad[2];
|
|
|
a85e8e |
+#define LINUX_XLF_KERNEL_64 (1<<0)
|
|
|
a85e8e |
+#define LINUX_XLF_CAN_BE_LOADED_ABOVE_4G (1<<1)
|
|
|
a85e8e |
+#define LINUX_XLF_EFI_HANDOVER_32 (1<<2)
|
|
|
a85e8e |
+#define LINUX_XLF_EFI_HANDOVER_64 (1<<3)
|
|
|
a85e8e |
+#define LINUX_XLF_EFI_KEXEC (1<<4)
|
|
|
a85e8e |
+ grub_uint16_t xloadflags;
|
|
|
a85e8e |
grub_uint32_t cmdline_size;
|
|
|
a85e8e |
grub_uint32_t hardware_subarch;
|
|
|
a85e8e |
grub_uint64_t hardware_subarch_data;
|
|
|
a85e8e |
--
|
|
|
a85e8e |
2.13.0
|
|
|
a85e8e |
|