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efi_loader: check tables in helloworld.efi

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Check if the device tree and the SMBIOS table are available.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Heinrich Schuchardt 2018-01-19 20:24:42 +01:00 committed by Alexander Graf
parent 36b41a3ced
commit 0aaabbb2c8
1 changed files with 26 additions and 0 deletions
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26
lib/efi_loader/helloworld.c
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@ -14,6 +14,22 @@
#include <efi_api.h>
static const efi_guid_t loaded_image_guid = LOADED_IMAGE_GUID;
static const efi_guid_t fdt_guid = EFI_FDT_GUID;
static const efi_guid_t smbios_guid = SMBIOS_TABLE_GUID;
static int hw_memcmp(const void *buf1, const void *buf2, size_t length)
{
const u8 *pos1 = buf1;
const u8 *pos2 = buf2;
for (; length; --length) {
if (*pos1 != *pos2)
return *pos1 - *pos2;
++pos1;
++pos2;
}
return 0;
}
/*
* Entry point of the EFI application.
@ -29,6 +45,7 @@ efi_status_t EFIAPI efi_main(efi_handle_t handle,
struct efi_boot_services *boottime = systable->boottime;
struct efi_loaded_image *loaded_image;
efi_status_t ret;
efi_uintn_t i;
con_out->output_string(con_out, L"Hello, world!\n");
@ -40,6 +57,15 @@ efi_status_t EFIAPI efi_main(efi_handle_t handle,
L"Cannot open loaded image protocol\n");
goto out;
}
/* Find configuration tables */
for (i = 0; i < systable->nr_tables; ++i) {
if (!hw_memcmp(&systable->tables[i].guid, &fdt_guid,
sizeof(efi_guid_t)))
con_out->output_string(con_out, L"Have device tree\n");
if (!hw_memcmp(&systable->tables[i].guid, &smbios_guid,
sizeof(efi_guid_t)))
con_out->output_string(con_out, L"Have SMBIOS table\n");
}
/* Output the load options */
con_out->output_string(con_out, L"Load options: ");
if (loaded_image->load_options_size && loaded_image->load_options)