On 3/30/20 9:06 AM, AKASHI Takahiro wrote:
On Thu, Mar 19, 2020 at 11:01:42PM +0100, Heinrich Schuchardt wrote:
In several places of the UEFI sub-system UEFI variables as accessed via
runtime services functions. These functions require being called via
EFI_CALL() to restore the register holding the gd variable. Some code
even calls the functions via the runtime services table.

Get/SetVariables are NOT the only interfaces used internally
in UEFI subsystem.
Why do you handle them in a special manner?
We should be consistent in this point.

On ARM every EFI_CALL() adds at least 8 bytes to the generated code for
calling __efi_entry_check() and __efi_exit_check(). For functions called
in many different places eliminating EFI_CALL() reduces the generated
code size.

On the other hand for debugging complicated functions like
ConnectController() it was sometimes usefull to be able to follow the
flow via the debug() statements.

I think we should reduce the usage of EFI_CALL().

Best regards

Heinrich


-Takahiro Akashi

By making the functions exposing the variable runtime services wrappers for
exported functions that we can use internally we get rid of this clumsy
code.

Signed-off-by: Heinrich Schuchardt <xypron.g...@gmx.de>
---
  cmd/efidebug.c                |  63 +++++++++----------
  cmd/nvedit_efi.c              |  18 +++---
  include/efi_loader.h          |   9 +++
  lib/efi_loader/efi_bootmgr.c  |  20 +++---
  lib/efi_loader/efi_setup.c    |  42 ++++++-------
  lib/efi_loader/efi_variable.c | 115 +++++++++++++++++++++++++++-------
  6 files changed, 169 insertions(+), 98 deletions(-)

diff --git a/cmd/efidebug.c b/cmd/efidebug.c
index bb7c13d6a1..f7744bdc55 100644
--- a/cmd/efidebug.c
+++ b/cmd/efidebug.c
@@ -17,7 +17,6 @@
  #include <linux/ctype.h>

  #define BS systab.boottime
-#define RT systab.runtime

  /**
   * efi_get_device_handle_info() - get information of UEFI device
@@ -612,11 +611,11 @@ static int do_efi_boot_add(cmd_tbl_t *cmdtp, int flag,
                goto out;
        }

-       ret = EFI_CALL(RT->set_variable(var_name16, &guid,
-                                       EFI_VARIABLE_NON_VOLATILE |
-                                       EFI_VARIABLE_BOOTSERVICE_ACCESS |
-                                       EFI_VARIABLE_RUNTIME_ACCESS,
-                                       size, data));
+       ret = efi_set_variable_int(var_name16, &guid,
+                                  EFI_VARIABLE_NON_VOLATILE |
+                                  EFI_VARIABLE_BOOTSERVICE_ACCESS |
+                                  EFI_VARIABLE_RUNTIME_ACCESS,
+                                  size, data);
        if (ret != EFI_SUCCESS) {
                printf("Cannot set %ls\n", var_name16);
                r = CMD_RET_FAILURE;
@@ -667,7 +666,8 @@ static int do_efi_boot_rm(cmd_tbl_t *cmdtp, int flag,
                p = var_name16;
                utf8_utf16_strncpy(&p, var_name, 9);

-               ret = EFI_CALL(RT->set_variable(var_name16, &guid, 0, 0, NULL));
+               ret = efi_set_variable_int(var_name16, &guid, 0, 0,
+                                          NULL);
                if (ret) {
                        printf("Cannot remove %ls\n", var_name16);
                        return CMD_RET_FAILURE;
@@ -747,11 +747,11 @@ static void show_efi_boot_opt(int id)
        guid = efi_global_variable_guid;

        size = 0;
-       ret = EFI_CALL(RT->get_variable(var_name16, &guid, NULL, &size, NULL));
+       ret = efi_get_variable_int(var_name16, &guid, NULL, &size, NULL);
        if (ret == EFI_BUFFER_TOO_SMALL) {
                data = malloc(size);
-               ret = EFI_CALL(RT->get_variable(var_name16, &guid, NULL, &size,
-                                               data));
+               ret = efi_get_variable_int(var_name16, &guid, NULL, &size,
+                                          data);
        }
        if (ret == EFI_SUCCESS)
                show_efi_boot_opt_data(id, data, size);
@@ -806,8 +806,7 @@ static int do_efi_boot_dump(cmd_tbl_t *cmdtp, int flag,
        var_name16[0] = 0;
        for (;;) {
                size = buf_size;
-               ret = EFI_CALL(efi_get_next_variable_name(&size, var_name16,
-                                                         &guid));
+               ret = efi_get_next_variable_name_int(&size, var_name16, &guid);
                if (ret == EFI_NOT_FOUND)
                        break;
                if (ret == EFI_BUFFER_TOO_SMALL) {
@@ -818,9 +817,8 @@ static int do_efi_boot_dump(cmd_tbl_t *cmdtp, int flag,
                                return CMD_RET_FAILURE;
                        }
                        var_name16 = p;
-                       ret = EFI_CALL(efi_get_next_variable_name(&size,
-                                                                 var_name16,
-                                                                 &guid));
+                       ret = efi_get_next_variable_name_int(&size, var_name16,
+                                                            &guid);
                }
                if (ret != EFI_SUCCESS) {
                        free(var_name16);
@@ -868,12 +866,11 @@ static int show_efi_boot_order(void)

        guid = efi_global_variable_guid;
        size = 0;
-       ret = EFI_CALL(RT->get_variable(L"BootOrder", &guid, NULL, &size,
-                                       NULL));
+       ret = efi_get_variable_int(L"BootOrder", &guid, NULL, &size, NULL);
        if (ret == EFI_BUFFER_TOO_SMALL) {
                bootorder = malloc(size);
-               ret = EFI_CALL(RT->get_variable(L"BootOrder", &guid, NULL,
-                                               &size, bootorder));
+               ret = efi_get_variable_int(L"BootOrder", &guid, NULL,
+                                          &size, bootorder);
        }
        if (ret == EFI_NOT_FOUND) {
                printf("BootOrder not defined\n");
@@ -891,8 +888,8 @@ static int show_efi_boot_order(void)
                utf8_utf16_strncpy(&p16, var_name, 9);

                size = 0;
-               ret = EFI_CALL(RT->get_variable(var_name16, &guid, NULL, &size,
-                                               NULL));
+               ret = efi_get_variable_int(var_name16, &guid, NULL, &size,
+                                          NULL);
                if (ret != EFI_BUFFER_TOO_SMALL) {
                        printf("%2d: Boot%04X: (not defined)\n",
                               i + 1, bootorder[i]);
@@ -904,8 +901,8 @@ static int show_efi_boot_order(void)
                        ret = CMD_RET_FAILURE;
                        goto out;
                }
-               ret = EFI_CALL(RT->get_variable(var_name16, &guid, NULL, &size,
-                                               data));
+               ret = efi_get_variable_int(var_name16, &guid, NULL, &size,
+                                          data);
                if (ret != EFI_SUCCESS) {
                        free(data);
                        ret = CMD_RET_FAILURE;
@@ -972,11 +969,11 @@ static int do_efi_boot_next(cmd_tbl_t *cmdtp, int flag,

        guid = efi_global_variable_guid;
        size = sizeof(u16);
-       ret = EFI_CALL(RT->set_variable(L"BootNext", &guid,
-                                       EFI_VARIABLE_NON_VOLATILE |
-                                       EFI_VARIABLE_BOOTSERVICE_ACCESS |
-                                       EFI_VARIABLE_RUNTIME_ACCESS,
-                                       size, &bootnext));
+       ret = efi_set_variable_int(L"BootNext", &guid,
+                                  EFI_VARIABLE_NON_VOLATILE |
+                                  EFI_VARIABLE_BOOTSERVICE_ACCESS |
+                                  EFI_VARIABLE_RUNTIME_ACCESS,
+                                  size, &bootnext);
        if (ret != EFI_SUCCESS) {
                printf("Cannot set BootNext\n");
                r = CMD_RET_FAILURE;
@@ -1033,11 +1030,11 @@ static int do_efi_boot_order(cmd_tbl_t *cmdtp, int flag,
        }

        guid = efi_global_variable_guid;
-       ret = EFI_CALL(RT->set_variable(L"BootOrder", &guid,
-                                       EFI_VARIABLE_NON_VOLATILE |
-                                       EFI_VARIABLE_BOOTSERVICE_ACCESS |
-                                       EFI_VARIABLE_RUNTIME_ACCESS,
-                                       size, bootorder));
+       ret = efi_set_variable_int(L"BootOrder", &guid,
+                                  EFI_VARIABLE_NON_VOLATILE |
+                                  EFI_VARIABLE_BOOTSERVICE_ACCESS |
+                                  EFI_VARIABLE_RUNTIME_ACCESS,
+                                  size, bootorder);
        if (ret != EFI_SUCCESS) {
                printf("Cannot set BootOrder\n");
                r = CMD_RET_FAILURE;
diff --git a/cmd/nvedit_efi.c b/cmd/nvedit_efi.c
index 8ea0da0128..9d338478d3 100644
--- a/cmd/nvedit_efi.c
+++ b/cmd/nvedit_efi.c
@@ -87,14 +87,14 @@ static void efi_dump_single_var(u16 *name, const efi_guid_t 
*guid, bool verbose)

        data = NULL;
        size = 0;
-       ret = EFI_CALL(efi_get_variable(name, guid, &attributes, &size, data));
+       ret = efi_get_variable_int(name, guid, &attributes, &size, data);
        if (ret == EFI_BUFFER_TOO_SMALL) {
                data = malloc(size);
                if (!data)
                        goto out;

-               ret = EFI_CALL(efi_get_variable(name, guid, &attributes, &size,
-                                               data));
+               ret = efi_get_variable_int(name, guid, &attributes, &size,
+                                          data);
        }
        if (ret == EFI_NOT_FOUND) {
                printf("Error: \"%ls\" not defined\n", name);
@@ -224,8 +224,7 @@ static int efi_dump_var_all(int argc,  char * const argv[],
        var_name16[0] = 0;
        for (;;) {
                size = buf_size;
-               ret = EFI_CALL(efi_get_next_variable_name(&size, var_name16,
-                                                         &guid));
+               ret = efi_get_next_variable_name_int(&size, var_name16, &guid);
                if (ret == EFI_NOT_FOUND)
                        break;
                if (ret == EFI_BUFFER_TOO_SMALL) {
@@ -236,9 +235,8 @@ static int efi_dump_var_all(int argc,  char * const argv[],
                                return CMD_RET_FAILURE;
                        }
                        var_name16 = p;
-                       ret = EFI_CALL(efi_get_next_variable_name(&size,
-                                                                 var_name16,
-                                                                 &guid));
+                       ret = efi_get_next_variable_name_int(&size, var_name16,
+                                                            &guid);
                }
                if (ret != EFI_SUCCESS) {
                        free(var_name16);
@@ -576,8 +574,8 @@ int do_env_set_efi(cmd_tbl_t *cmdtp, int flag, int argc, 
char * const argv[])
        p = var_name16;
        utf8_utf16_strncpy(&p, var_name, len + 1);

-       ret = EFI_CALL(efi_set_variable(var_name16, &guid, attributes,
-                                       size, value));
+       ret = efi_set_variable_int(var_name16, &guid, attributes, size,
+                                  value);
        unmap_sysmem(value);
        if (ret == EFI_SUCCESS) {
                ret = CMD_RET_SUCCESS;
diff --git a/include/efi_loader.h b/include/efi_loader.h
index 37c3f15da1..8c4a3bfa61 100644
--- a/include/efi_loader.h
+++ b/include/efi_loader.h
@@ -643,12 +643,21 @@ efi_status_t EFIAPI efi_selftest(efi_handle_t 
image_handle,
  efi_status_t EFIAPI efi_get_variable(u16 *variable_name,
                                     const efi_guid_t *vendor, u32 *attributes,
                                     efi_uintn_t *data_size, void *data);
+efi_status_t efi_get_variable_int(u16 *variable_name, const efi_guid_t *vendor,
+                                 u32 *attributes,
+                                 efi_uintn_t *data_size, void *data);
  efi_status_t EFIAPI efi_get_next_variable_name(efi_uintn_t 
*variable_name_size,
                                               u16 *variable_name,
                                               const efi_guid_t *vendor);
+efi_status_t efi_get_next_variable_name_int(efi_uintn_t *variable_name_size,
+                                           u16 *variable_name,
+                                           const efi_guid_t *vendor);
  efi_status_t EFIAPI efi_set_variable(u16 *variable_name,
                                     const efi_guid_t *vendor, u32 attributes,
                                     efi_uintn_t data_size, const void *data);
+efi_status_t efi_set_variable_int(u16 *variable_name,
+                                 const efi_guid_t *vendor, u32 attributes,
+                                 efi_uintn_t data_size, const void *data);

  efi_status_t EFIAPI efi_query_variable_info(
                        u32 attributes, u64 *maximum_variable_storage_size,
diff --git a/lib/efi_loader/efi_bootmgr.c b/lib/efi_loader/efi_bootmgr.c
index 2ea21448f0..c87f38e46c 100644
--- a/lib/efi_loader/efi_bootmgr.c
+++ b/lib/efi_loader/efi_bootmgr.c
@@ -12,7 +12,6 @@
  #include <asm/unaligned.h>

  static const struct efi_boot_services *bs;
-static const struct efi_runtime_services *rs;

  /*
   * bootmgr implements the logic of trying to find a payload to boot
@@ -123,10 +122,10 @@ static void *get_var(u16 *name, const efi_guid_t *vendor,
        void *buf = NULL;

        *size = 0;
-       EFI_CALL(ret = rs->get_variable(name, v, NULL, size, buf));
+       ret = efi_get_variable_int(name, v, NULL, size, buf);
        if (ret == EFI_BUFFER_TOO_SMALL) {
                buf = malloc(*size);
-               EFI_CALL(ret = rs->get_variable(name, v, NULL, size, buf));
+               ret = efi_get_variable_int(name, v, NULL, size, buf);
        }

        if (ret != EFI_SUCCESS) {
@@ -186,10 +185,10 @@ static efi_status_t try_load_entry(u16 n, efi_handle_t 
*handle)
                attributes = EFI_VARIABLE_BOOTSERVICE_ACCESS |
                             EFI_VARIABLE_RUNTIME_ACCESS;
                size = sizeof(n);
-               ret = EFI_CALL(efi_set_variable(
+               ret = efi_set_variable_int(
                                L"BootCurrent",
                                (efi_guid_t *)&efi_global_variable_guid,
-                               attributes, size, &n));
+                               attributes, size, &n);
                if (ret != EFI_SUCCESS) {
                        if (EFI_CALL(efi_unload_image(*handle))
                            != EFI_SUCCESS)
@@ -226,25 +225,24 @@ efi_status_t efi_bootmgr_load(efi_handle_t *handle)
        efi_status_t ret;

        bs = systab.boottime;
-       rs = systab.runtime;

        /* BootNext */
        bootnext = 0;
        size = sizeof(bootnext);
-       ret = EFI_CALL(efi_get_variable(L"BootNext",
-                                       (efi_guid_t *)&efi_global_variable_guid,
-                                       NULL, &size, &bootnext));
+       ret = efi_get_variable_int(L"BootNext",
+                                  (efi_guid_t *)&efi_global_variable_guid,
+                                  NULL, &size, &bootnext);
        if (ret == EFI_SUCCESS || ret == EFI_BUFFER_TOO_SMALL) {
                /* BootNext does exist here */
                if (ret == EFI_BUFFER_TOO_SMALL || size != sizeof(u16))
                        printf("BootNext must be 16-bit integer\n");

                /* delete BootNext */
-               ret = EFI_CALL(efi_set_variable(
+               ret = efi_set_variable_int(
                                        L"BootNext",
                                        (efi_guid_t *)&efi_global_variable_guid,
                                        EFI_VARIABLE_NON_VOLATILE, 0,
-                                       &bootnext));
+                                       &bootnext);

                /* load BootNext */
                if (ret == EFI_SUCCESS) {
diff --git a/lib/efi_loader/efi_setup.c b/lib/efi_loader/efi_setup.c
index b458093dfb..d1884e4dae 100644
--- a/lib/efi_loader/efi_setup.c
+++ b/lib/efi_loader/efi_setup.c
@@ -40,12 +40,12 @@ static efi_status_t efi_init_platform_lang(void)
         * Variable PlatformLangCodes defines the language codes that the
         * machine can support.
         */
-       ret = EFI_CALL(efi_set_variable(L"PlatformLangCodes",
-                                       &efi_global_variable_guid,
-                                       EFI_VARIABLE_BOOTSERVICE_ACCESS |
-                                       EFI_VARIABLE_RUNTIME_ACCESS,
-                                       sizeof(CONFIG_EFI_PLATFORM_LANG_CODES),
-                                       CONFIG_EFI_PLATFORM_LANG_CODES));
+       ret = efi_set_variable_int(L"PlatformLangCodes",
+                                  &efi_global_variable_guid,
+                                  EFI_VARIABLE_BOOTSERVICE_ACCESS |
+                                  EFI_VARIABLE_RUNTIME_ACCESS,
+                                  sizeof(CONFIG_EFI_PLATFORM_LANG_CODES),
+                                  CONFIG_EFI_PLATFORM_LANG_CODES);
        if (ret != EFI_SUCCESS)
                goto out;

@@ -53,9 +53,9 @@ static efi_status_t efi_init_platform_lang(void)
         * Variable PlatformLang defines the language that the machine has been
         * configured for.
         */
-       ret = EFI_CALL(efi_get_variable(L"PlatformLang",
-                                       &efi_global_variable_guid,
-                                       NULL, &data_size, &pos));
+       ret = efi_get_variable_int(L"PlatformLang",
+                                  &efi_global_variable_guid,
+                                  NULL, &data_size, &pos);
        if (ret == EFI_BUFFER_TOO_SMALL) {
                /* The variable is already set. Do not change it. */
                ret = EFI_SUCCESS;
@@ -70,12 +70,12 @@ static efi_status_t efi_init_platform_lang(void)
        if (pos)
                *pos = 0;

-       ret = EFI_CALL(efi_set_variable(L"PlatformLang",
-                                       &efi_global_variable_guid,
-                                       EFI_VARIABLE_NON_VOLATILE |
-                                       EFI_VARIABLE_BOOTSERVICE_ACCESS |
-                                       EFI_VARIABLE_RUNTIME_ACCESS,
-                                       1 + strlen(lang), lang));
+       ret = efi_set_variable_int(L"PlatformLang",
+                                  &efi_global_variable_guid,
+                                  EFI_VARIABLE_NON_VOLATILE |
+                                  EFI_VARIABLE_BOOTSERVICE_ACCESS |
+                                  EFI_VARIABLE_RUNTIME_ACCESS,
+                                  1 + strlen(lang), lang);
  out:
        if (ret != EFI_SUCCESS)
                printf("EFI: cannot initialize platform language settings\n");
@@ -113,12 +113,12 @@ efi_status_t efi_init_obj_list(void)
                goto out;

        /* Indicate supported features */
-       ret = EFI_CALL(efi_set_variable(L"OsIndicationsSupported",
-                                       &efi_global_variable_guid,
-                                       EFI_VARIABLE_BOOTSERVICE_ACCESS |
-                                       EFI_VARIABLE_RUNTIME_ACCESS,
-                                       sizeof(os_indications_supported),
-                                       &os_indications_supported));
+       ret = efi_set_variable_int(L"OsIndicationsSupported",
+                                  &efi_global_variable_guid,
+                                  EFI_VARIABLE_BOOTSERVICE_ACCESS |
+                                  EFI_VARIABLE_RUNTIME_ACCESS,
+                                  sizeof(os_indications_supported),
+                                  &os_indications_supported);
        if (ret != EFI_SUCCESS)
                goto out;

diff --git a/lib/efi_loader/efi_variable.c b/lib/efi_loader/efi_variable.c
index 99d2f01f57..b6f0b58268 100644
--- a/lib/efi_loader/efi_variable.c
+++ b/lib/efi_loader/efi_variable.c
@@ -165,6 +165,30 @@ static const char *parse_attr(const char *str, u32 *attrp)
  efi_status_t EFIAPI efi_get_variable(u16 *variable_name,
                                     const efi_guid_t *vendor, u32 *attributes,
                                     efi_uintn_t *data_size, void *data)
+{
+       EFI_ENTRY("\"%ls\" %pUl %p %p %p", variable_name, vendor, attributes,
+                 data_size, data);
+
+       return EFI_EXIT(efi_get_variable_int(variable_name, vendor, attributes,
+                                            data_size, data));
+}
+
+/**
+ * efi_get_variable_int() - retrieve value of a UEFI variable
+ *
+ * This function allows to retrieve the value of a UEFI variable without using
+ * EFI_CALL().
+ *
+ * @variable_name:     name of the variable
+ * @vendor:            vendor GUID
+ * @attributes:                attributes of the variable
+ * @data_size:         size of the buffer to which the variable value is copied
+ * @data:              buffer to which the variable value is copied
+ * Return:             status code
+ */
+efi_status_t efi_get_variable_int(u16 *variable_name,
+                                 const efi_guid_t *vendor, u32 *attributes,
+                                 efi_uintn_t *data_size, void *data)
  {
        char *native_name;
        efi_status_t ret;
@@ -172,22 +196,20 @@ efi_status_t EFIAPI efi_get_variable(u16 *variable_name,
        const char *val, *s;
        u32 attr;

-       EFI_ENTRY("\"%ls\" %pUl %p %p %p", variable_name, vendor, attributes,
-                 data_size, data);

        if (!variable_name || !vendor || !data_size)
-               return EFI_EXIT(EFI_INVALID_PARAMETER);
+               return EFI_INVALID_PARAMETER;

        ret = efi_to_native(&native_name, variable_name, vendor);
        if (ret)
-               return EFI_EXIT(ret);
+               return ret;

        EFI_PRINT("get '%s'\n", native_name);

        val = env_get(native_name);
        free(native_name);
        if (!val)
-               return EFI_EXIT(EFI_NOT_FOUND);
+               return EFI_NOT_FOUND;

        val = parse_attr(val, &attr);

@@ -198,7 +220,7 @@ efi_status_t EFIAPI efi_get_variable(u16 *variable_name,

                /* number of hexadecimal digits must be even */
                if (len & 1)
-                       return EFI_EXIT(EFI_DEVICE_ERROR);
+                       return EFI_DEVICE_ERROR;

                /* two characters per byte: */
                len /= 2;
@@ -210,10 +232,10 @@ efi_status_t EFIAPI efi_get_variable(u16 *variable_name,
                }

                if (!data)
-                       return EFI_EXIT(EFI_INVALID_PARAMETER);
+                       return EFI_INVALID_PARAMETER;

                if (hex2bin(data, s, len))
-                       return EFI_EXIT(EFI_DEVICE_ERROR);
+                       return EFI_DEVICE_ERROR;

                EFI_PRINT("got value: \"%s\"\n", s);
        } else if ((s = prefix(val, "(utf8)"))) {
@@ -227,7 +249,7 @@ efi_status_t EFIAPI efi_get_variable(u16 *variable_name,
                }

                if (!data)
-                       return EFI_EXIT(EFI_INVALID_PARAMETER);
+                       return EFI_INVALID_PARAMETER;

                memcpy(data, s, len);
                ((char *)data)[len] = '\0';
@@ -235,14 +257,14 @@ efi_status_t EFIAPI efi_get_variable(u16 *variable_name,
                EFI_PRINT("got value: \"%s\"\n", (char *)data);
        } else {
                EFI_PRINT("invalid value: '%s'\n", val);
-               return EFI_EXIT(EFI_DEVICE_ERROR);
+               return EFI_DEVICE_ERROR;
        }

  out:
        if (attributes)
                *attributes = attr & EFI_VARIABLE_MASK;

-       return EFI_EXIT(ret);
+       return ret;
  }

  static char *efi_variables_list;
@@ -330,6 +352,34 @@ static efi_status_t parse_uboot_variable(char *variable,
  efi_status_t EFIAPI efi_get_next_variable_name(efi_uintn_t 
*variable_name_size,
                                               u16 *variable_name,
                                               const efi_guid_t *vendor)
+{
+       EFI_ENTRY("%p \"%ls\" %pUl", variable_name_size, variable_name, vendor);
+
+       return EFI_EXIT(efi_get_next_variable_name_int(variable_name_size,
+                                                      variable_name, vendor));
+}
+
+/**
+ * efi_get_next_variable_name_int() - enumerate the current variable names
+ *
+ * This function can be used to enumerate UEFI variable without using
+ * EFI_CALL().
+ *
+ * @variable_name_size:        size of variable_name buffer in byte
+ * @variable_name:     name of uefi variable's name in u16
+ * @vendor:            vendor's guid
+ *
+ * This function implements the GetNextVariableName service.
+ *
+ * See the Unified Extensible Firmware Interface (UEFI) specification for
+ * details.
+ *
+ * Return: status code
+ */
+efi_status_t EFIAPI efi_get_next_variable_name_int(
+                                       efi_uintn_t *variable_name_size,
+                                       u16 *variable_name,
+                                       const efi_guid_t *vendor)
  {
        char *native_name, *variable;
        ssize_t name_len, list_len;
@@ -339,10 +389,8 @@ efi_status_t EFIAPI efi_get_next_variable_name(efi_uintn_t 
*variable_name_size,
        int i;
        efi_status_t ret;

-       EFI_ENTRY("%p \"%ls\" %pUl", variable_name_size, variable_name, vendor);
-
        if (!variable_name_size || !variable_name || !vendor)
-               return EFI_EXIT(EFI_INVALID_PARAMETER);
+               return EFI_INVALID_PARAMETER;

        if (variable_name[0]) {
                /* check null-terminated string */
@@ -350,12 +398,12 @@ efi_status_t EFIAPI 
efi_get_next_variable_name(efi_uintn_t *variable_name_size,
                        if (!variable_name[i])
                                break;
                if (i >= *variable_name_size)
-                       return EFI_EXIT(EFI_INVALID_PARAMETER);
+                       return EFI_INVALID_PARAMETER;

                /* search for the last-returned variable */
                ret = efi_to_native(&native_name, variable_name, vendor);
                if (ret)
-                       return EFI_EXIT(ret);
+                       return ret;

                name_len = strlen(native_name);
                for (variable = efi_variables_list; variable && *variable;) {
@@ -370,14 +418,14 @@ efi_status_t EFIAPI 
efi_get_next_variable_name(efi_uintn_t *variable_name_size,

                free(native_name);
                if (!(variable && *variable))
-                       return EFI_EXIT(EFI_INVALID_PARAMETER);
+                       return EFI_INVALID_PARAMETER;

                /* next variable */
                variable = strchr(variable, '\n');
                if (variable)
                        variable++;
                if (!(variable && *variable))
-                       return EFI_EXIT(EFI_NOT_FOUND);
+                       return EFI_NOT_FOUND;
        } else {
                /*
                 *new search: free a list used in the previous search
@@ -392,7 +440,7 @@ efi_status_t EFIAPI efi_get_next_variable_name(efi_uintn_t 
*variable_name_size,
                                     &efi_variables_list, 0, 1, regexlist);
                /* 1 indicates that no match was found */
                if (list_len <= 1)
-                       return EFI_EXIT(EFI_NOT_FOUND);
+                       return EFI_NOT_FOUND;

                variable = efi_variables_list;
        }
@@ -400,7 +448,7 @@ efi_status_t EFIAPI efi_get_next_variable_name(efi_uintn_t 
*variable_name_size,
        ret = parse_uboot_variable(variable, variable_name_size, variable_name,
                                   vendor, &attributes);

-       return EFI_EXIT(ret);
+       return ret;
  }

  /**
@@ -421,6 +469,29 @@ efi_status_t EFIAPI efi_get_next_variable_name(efi_uintn_t 
*variable_name_size,
  efi_status_t EFIAPI efi_set_variable(u16 *variable_name,
                                     const efi_guid_t *vendor, u32 attributes,
                                     efi_uintn_t data_size, const void *data)
+{
+       EFI_ENTRY("\"%ls\" %pUl %x %zu %p", variable_name, vendor, attributes,
+                 data_size, data);
+
+       return EFI_EXIT(efi_set_variable_int(variable_name, vendor, attributes,
+                                            data_size, data));
+}
+
+/**
+ * efi_set_variable_int() - set value of a UEFI variable internal
+ *
+ * This function can be used to set a UEFI variable without using EFI_CALL().
+ *
+ * @variable_name:     name of the variable
+ * @vendor:            vendor GUID
+ * @attributes:                attributes of the variable
+ * @data_size:         size of the buffer with the variable value
+ * @data:              buffer with the variable value
+ * Return:             status code
+ */
+efi_status_t efi_set_variable_int(u16 *variable_name,
+                                 const efi_guid_t *vendor, u32 attributes,
+                                 efi_uintn_t data_size, const void *data)
  {
        char *native_name = NULL, *val = NULL, *s;
        const char *old_val;
@@ -428,8 +499,6 @@ efi_status_t EFIAPI efi_set_variable(u16 *variable_name,
        efi_status_t ret = EFI_SUCCESS;
        u32 attr;

-       EFI_ENTRY("\"%ls\" %pUl %x %zu %p", variable_name, vendor, attributes,
-                 data_size, data);

        if (!variable_name || !*variable_name || !vendor ||
            ((attributes & EFI_VARIABLE_RUNTIME_ACCESS) &&
@@ -539,7 +608,7 @@ out:
        free(native_name);
        free(val);

-       return EFI_EXIT(ret);
+       return ret;
  }

  /**
--
2.25.1


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