On Thu, 21 May 2026 at 21:50, Heinrich Schuchardt <[email protected]> wrote: > > Provide an EFI binary that can dump all ACPI tables to files > <table_name>.dat. These can then be further analyzed by decompiling > with iasl. > > Signed-off-by: Heinrich Schuchardt <[email protected]>
Acked-by: Ilias Apalodimas <[email protected]> > --- > lib/efi_loader/Makefile | 1 + > lib/efi_loader/acpidump.c | 999 ++++++++++++++++++++++++++++++++++++++ > 2 files changed, 1000 insertions(+) > create mode 100644 lib/efi_loader/acpidump.c > > diff --git a/lib/efi_loader/Makefile b/lib/efi_loader/Makefile > index d73ad43951b..118566ee7ef 100644 > --- a/lib/efi_loader/Makefile > +++ b/lib/efi_loader/Makefile > @@ -16,6 +16,7 @@ CFLAGS_efi_boottime.o += \ > apps-$(CONFIG_RISCV) += boothart > apps-$(CONFIG_BOOTEFI_HELLO_COMPILE) += helloworld > apps-$(CONFIG_GENERATE_SMBIOS_TABLE) += smbiosdump > +apps-$(CONFIG_GENERATE_ACPI_TABLE) += acpidump > apps-$(CONFIG_EFI_LOAD_FILE2_INITRD) += initrddump > ifeq ($(CONFIG_GENERATE_ACPI_TABLE),) > apps-y += dtbdump > diff --git a/lib/efi_loader/acpidump.c b/lib/efi_loader/acpidump.c > new file mode 100644 > index 00000000000..0bc3770c85d > --- /dev/null > +++ b/lib/efi_loader/acpidump.c > @@ -0,0 +1,999 @@ > +// SPDX-License-Identifier: GPL-2.0-or-later > +/* > + * Copyright 2026, Heinrich Schuchardt <[email protected]> > + * > + * acpidump.efi saves the ACPI table set as file. > + * > + * Specifying 'nocolor' as load option data suppresses colored output and > + * clearing of the screen. > + */ > + > +#include <efi_api.h> > +#include <part.h> > +#include <string.h> > +#include <acpi/acpi_table.h> > + > +#define BUFFER_SIZE 64 > + > +struct acpi_dump_table { > + char signature[5]; > + uintptr_t addr; > + u32 len; > +}; > + > +static struct efi_simple_text_output_protocol *cout; > +static struct efi_simple_text_input_protocol *cin; > +static struct efi_boot_services *bs; > +static efi_handle_t handle; > +static struct efi_system_table *systable; > +static const efi_guid_t acpi2_guid = EFI_ACPI_TABLE_GUID; > +static const efi_guid_t acpi1_guid = EFI_GUID_EFI_ACPI1; > +static const efi_guid_t loaded_image_guid = EFI_LOADED_IMAGE_PROTOCOL_GUID; > +static const efi_guid_t guid_simple_file_system_protocol = > + EFI_SIMPLE_FILE_SYSTEM_PROTOCOL_GUID; > +static const efi_guid_t efi_system_partition_guid = PARTITION_SYSTEM_GUID; > +static bool nocolor; > + > +/** > + * checksum_ok() - check if byte-sum of buffer is zero > + * > + * @buf: buffer to check > + * @len: buffer length > + * Return: true if checksum is valid > + */ > +static bool checksum_ok(const void *buf, efi_uintn_t len) > +{ > + const u8 *pos = buf; > + u8 sum = 0; > + > + for (; len; --len, ++pos) > + sum += *pos; > + > + return !sum; > +} > + > +/** > + * read_u32() - read 32-bit value via memcpy > + * > + * @src: source address > + * Return: value > + */ > +static u32 read_u32(const void *src) > +{ > + u32 val; > + > + memcpy(&val, src, sizeof(val)); > + > + return val; > +} > + > +/** > + * read_u64() - read 64-bit value via memcpy > + * > + * @src: source address > + * Return: value > + */ > +static u64 read_u64(const void *src) > +{ > + u64 val; > + > + memcpy(&val, src, sizeof(val)); > + > + return val; > +} > + > +/** > + * color() - set foreground color > + * > + * @color: foreground color > + */ > +static void color(u8 color) > +{ > + if (!nocolor) > + cout->set_attribute(cout, color | EFI_BACKGROUND_BLACK); > +} > + > +/** > + * print() - print string > + * > + * @string: text > + */ > +static void print(u16 *string) > +{ > + cout->output_string(cout, string); > +} > + > +/** > + * is_filename_char() - check if a signature byte is filename-safe > + * > + * @ch: character to check > + * Return: true if filename-safe > + */ > +static bool is_filename_char(char ch) > +{ > + return (ch >= 'A' && ch <= 'Z') || > + (ch >= 'a' && ch <= 'z') || > + (ch >= '0' && ch <= '9') || ch == '_'; > +} > + > +/** > + * ascii_to_utf16() - convert ASCII string to UTF-16 > + * > + * @dst: destination UTF-16 buffer > + * @dst_size: destination size in UTF-16 code units > + * @src: source ASCII string > + */ > +static void ascii_to_utf16(u16 *dst, efi_uintn_t dst_size, const char *src) > +{ > + efi_uintn_t i; > + > + if (!dst_size) > + return; > + > + for (i = 0; i < dst_size - 1 && src[i]; ++i) > + dst[i] = (u8)src[i]; > + dst[i] = 0; > +} > + > +/** > + * append_uint_dec() - append unsigned decimal number to C string > + * > + * @str: destination string > + * @pos: current write position > + * @size: destination size > + * @val: value to append > + * Return: updated write position > + */ > +static efi_uintn_t append_uint_dec(char *str, efi_uintn_t pos, > + efi_uintn_t size, u32 val) > +{ > + char tmp[11]; > + efi_uintn_t n = 0; > + efi_uintn_t i; > + > + if (!val) > + tmp[n++] = '0'; > + while (val && n < ARRAY_SIZE(tmp)) { > + tmp[n++] = '0' + val % 10; > + val /= 10; > + } > + > + for (i = 0; i < n && pos + 1 < size; ++i) > + str[pos++] = tmp[n - i - 1]; > + > + if (pos < size) > + str[pos] = 0; > + > + return pos; > +} > + > +/** > + * u32_to_utf16_dec() - convert unsigned integer to UTF-16 decimal > + * > + * @dst: destination UTF-16 buffer > + * @dst_size: destination size in UTF-16 code units > + * @val: value to convert > + */ > +static void u32_to_utf16_dec(u16 *dst, efi_uintn_t dst_size, u32 val) > +{ > + char ascii[11] = {0}; > + > + append_uint_dec(ascii, 0, sizeof(ascii), val); > + ascii_to_utf16(dst, dst_size, ascii); > +} > + > +/** > + * build_table_filename() - construct table filename > + * > + * @sig: 4-byte ACPI signature string > + * @instance: duplicate instance number (0 for first) > + * @name: output filename buffer > + * @name_size: output filename buffer size > + */ > +static void build_table_filename(const char *sig, u32 instance, char *name, > + efi_uintn_t name_size) > +{ > + efi_uintn_t pos = 0; > + int i; > + > + if (!name_size) > + return; > + > + for (i = 0; i < 4 && pos + 1 < name_size; ++i) > + name[pos++] = is_filename_char(sig[i]) ? sig[i] : '_'; > + > + if (instance) > + pos = append_uint_dec(name, pos, name_size, instance); > + > + if (pos + 4 < name_size) { > + name[pos++] = '.'; > + name[pos++] = 'd'; > + name[pos++] = 'a'; > + name[pos++] = 't'; > + } > + name[pos] = 0; > +} > + > +/** > + * printp() - print pointer > + * > + * @p: pointer > + */ > +static void printp(void *p) > +{ > + u16 str[2 + 2 * sizeof(void *) + 1] = u"0x"; > + u16 *ptr = &str[2]; > + u16 ch; > + int i; > + > + for (i = 8 * sizeof(void *) - 4; i >= 0; i -= 4) { > + ch = ((uintptr_t)p >> i & 0xf) + '0'; > + if (ch > '9') > + ch += 'a' - '9' - 1; > + *ptr++ = ch; > + } > + *ptr = 0; > + print(str); > +} > + > +/** > + * cls() - clear screen > + */ > +static void cls(void) > +{ > + if (nocolor) > + print(u"\r\n"); > + else > + cout->clear_screen(cout); > +} > + > +/** > + * error() - print error string > + * > + * @string: error text > + */ > +static void error(u16 *string) > +{ > + color(EFI_LIGHTRED); > + print(string); > + color(EFI_LIGHTBLUE); > +} > + > +/** > + * efi_input_yn() - get answer to yes/no question > + * > + * Return: > + * y or Y > + * EFI_SUCCESS > + * n or N > + * EFI_ACCESS_DENIED > + * ESC > + * EFI_ABORTED > + */ > +static efi_status_t efi_input_yn(void) > +{ > + struct efi_input_key key = {0}; > + efi_uintn_t index; > + efi_status_t ret; > + > + /* Drain the console input */ > + ret = cin->reset(cin, true); > + for (;;) { > + ret = bs->wait_for_event(1, &cin->wait_for_key, &index); > + if (ret != EFI_SUCCESS) > + continue; > + ret = cin->read_key_stroke(cin, &key); > + if (ret != EFI_SUCCESS) > + continue; > + switch (key.scan_code) { > + case 0x17: /* Escape */ > + return EFI_ABORTED; > + default: > + break; > + } > + /* Convert to lower case */ > + switch (key.unicode_char | 0x20) { > + case 'y': > + return EFI_SUCCESS; > + case 'n': > + return EFI_ACCESS_DENIED; > + default: > + break; > + } > + } > +} > + > +/** > + * efi_input() - read string from console > + * > + * @buffer: input buffer > + * @buffer_size: buffer size > + * Return: status code > + */ > +static efi_status_t efi_input(u16 *buffer, efi_uintn_t buffer_size) > +{ > + struct efi_input_key key = {0}; > + efi_uintn_t index; > + efi_uintn_t pos = 0; > + u16 outbuf[2] = u" "; > + efi_status_t ret; > + > + /* Drain the console input */ > + ret = cin->reset(cin, true); > + *buffer = 0; > + for (;;) { > + ret = bs->wait_for_event(1, &cin->wait_for_key, &index); > + if (ret != EFI_SUCCESS) > + continue; > + ret = cin->read_key_stroke(cin, &key); > + if (ret != EFI_SUCCESS) > + continue; > + switch (key.scan_code) { > + case 0x17: /* Escape */ > + print(u"\r\nAborted\r\n"); > + return EFI_ABORTED; > + default: > + break; > + } > + switch (key.unicode_char) { > + case 0x08: /* Backspace */ > + if (pos) { > + buffer[pos--] = 0; > + print(u"\b \b"); > + } > + break; > + case 0x0a: /* Linefeed */ > + case 0x0d: /* Carriage return */ > + print(u"\r\n"); > + return EFI_SUCCESS; > + default: > + break; > + } > + /* Ignore surrogate codes */ > + if (key.unicode_char >= 0xD800 && key.unicode_char <= 0xDBFF) > + continue; > + if (key.unicode_char >= 0x20 && > + pos < buffer_size - 1) { > + *outbuf = key.unicode_char; > + buffer[pos++] = key.unicode_char; > + buffer[pos] = 0; > + print(outbuf); > + } > + } > +} > + > +/** > + * skip_whitespace() - skip over leading whitespace > + * > + * @pos: UTF-16 string > + * Return: pointer to first non-whitespace > + */ > +static u16 *skip_whitespace(u16 *pos) > +{ > + for (; *pos && *pos <= 0x20; ++pos) > + ; > + return pos; > +} > + > +/** > + * starts_with() - check if @string starts with @keyword > + * > + * @string: string to search for keyword > + * @keyword: keyword to be searched > + * Return: true fi @string starts with the keyword > + */ > +static bool starts_with(u16 *string, u16 *keyword) > +{ > + if (!string || !keyword) > + return false; > + > + for (; *keyword; ++string, ++keyword) { > + if (*string != *keyword) > + return false; > + } > + return true; > +} > + > +/** > + * open_file_system() - open simple file system protocol > + * > + * file_system: interface of the simple file system protocol > + * Return: status code > + */ > +static efi_status_t > +open_file_system(struct efi_simple_file_system_protocol **file_system) > +{ > + struct efi_loaded_image *loaded_image; > + efi_status_t ret; > + efi_handle_t *handle_buffer = NULL; > + efi_uintn_t count; > + > + ret = bs->open_protocol(handle, &loaded_image_guid, > + (void **)&loaded_image, NULL, NULL, > + EFI_OPEN_PROTOCOL_GET_PROTOCOL); > + if (ret != EFI_SUCCESS) { > + error(u"Loaded image protocol not found\r\n"); > + return ret; > + } > + > + /* Open the simple file system protocol on the same partition */ > + ret = bs->open_protocol(loaded_image->device_handle, > + &guid_simple_file_system_protocol, > + (void **)file_system, NULL, NULL, > + EFI_OPEN_PROTOCOL_GET_PROTOCOL); > + if (ret == EFI_SUCCESS) > + return ret; > + > + /* Open the simple file system protocol on the UEFI system partition > */ > + ret = bs->locate_handle_buffer(BY_PROTOCOL, > &efi_system_partition_guid, > + NULL, &count, &handle_buffer); > + if (ret == EFI_SUCCESS && handle_buffer) > + ret = bs->open_protocol(handle_buffer[0], > + &guid_simple_file_system_protocol, > + (void **)file_system, NULL, NULL, > + EFI_OPEN_PROTOCOL_GET_PROTOCOL); > + if (ret != EFI_SUCCESS) > + error(u"Failed to open simple file system protocol\r\n"); > + if (handle_buffer) > + bs->free_pool(handle_buffer); > + > + return ret; > +} > + > +/** > + * do_help() - print help > + */ > +static void do_help(void) > +{ > + error(u"check - parse ACPI table list\r\n"); > + error(u"write - save one file per ACPI table\r\n"); > + error(u"exit - exit the shell\r\n"); > +} > + > +/** > + * get_config_table() - get configuration table > + * > + * @guid: GUID of the configuration table > + * Return: pointer to configuration table or NULL > + */ > +static void *get_config_table(const efi_guid_t *guid) > +{ > + size_t i; > + > + for (i = 0; i < systable->nr_tables; ++i) { > + if (!memcmp(guid, &systable->tables[i].guid, sizeof(*guid))) > + return systable->tables[i].table; > + } > + > + return NULL; > +} > + > +/** > + * get_acpi_rsdp_addr() - find ACPI RSDP via EFI config table GUID > + * > + * Return: pointer to RSDP or NULL > + */ > +static struct acpi_rsdp *get_acpi_rsdp_addr(void) > +{ > + struct acpi_rsdp *rsdp; > + > + rsdp = get_config_table(&acpi2_guid); > + if (rsdp) > + return rsdp; > + > + rsdp = get_config_table(&acpi1_guid); > + > + return rsdp; > +} > + > +/** > + * add_table() - append one ACPI table entry > + * > + * @tables: table array > + * @table_count: current table count > + * @addr: table address > + * @len: table length > + * @sig: 4-character ACPI signature > + * Return: status code > + */ > +static efi_status_t add_table(struct acpi_dump_table *tables, u32 > *table_count, > + uintptr_t addr, u32 len, const char *sig) > +{ > + struct acpi_dump_table *table = &tables[*table_count]; > + > + memset(table, 0, sizeof(*table)); > + memcpy(table->signature, sig, 4); > + table->addr = addr; > + table->len = len; > + ++*table_count; > + > + return EFI_SUCCESS; > +} > + > +/** > + * has_table_addr() - check if a table address is already in the list > + * > + * @tables: table array > + * @table_count: number of used entries > + * @addr: table address to search > + * Return: true if found > + */ > +static bool has_table_addr(struct acpi_dump_table *tables, u32 table_count, > + uintptr_t addr) > +{ > + u32 i; > + > + for (i = 0; i < table_count; ++i) { > + if (tables[i].addr == addr) > + return true; > + } > + > + return false; > +} > + > +/** > + * collect_tables() - parse ACPI table structure and collect ACPI tables > + * > + * @tablesp: output table array > + * @table_count: output table count > + * Return: status code > + */ > +static efi_status_t collect_tables(struct acpi_dump_table **tablesp, > + u32 *table_count) > +{ > + struct acpi_rsdp *rsdp; > + struct acpi_table_header *root; > + struct acpi_dump_table *tables; > + uintptr_t root_addr; > + u32 rsdp_len, root_len, max_tables; > + u32 i, entries, entry_size; > + bool use_xsdt; > + efi_status_t ret; > + > + rsdp = get_acpi_rsdp_addr(); > + print(u"RSDP address: "); > + printp(rsdp); > + print(u"\r\n"); > + if (!rsdp) { > + error(u"No ACPI configuration table\r\n"); > + return EFI_NOT_FOUND; > + } > + > + if (memcmp(rsdp->signature, RSDP_SIG, sizeof(rsdp->signature))) { > + error(u"Invalid RSDP signature\r\n"); > + return EFI_LOAD_ERROR; > + } > + if (!checksum_ok(rsdp, 20)) { > + error(u"Invalid RSDP checksum\r\n"); > + return EFI_LOAD_ERROR; > + } > + > + rsdp_len = rsdp->revision >= ACPI_RSDP_REV_ACPI_2_0 ? > + read_u32(&rsdp->length) : 20; > + if (rsdp_len < 20) { > + error(u"Invalid RSDP length\r\n"); > + return EFI_LOAD_ERROR; > + } > + if (rsdp->revision >= ACPI_RSDP_REV_ACPI_2_0) { > + if (rsdp_len < sizeof(struct acpi_rsdp)) { > + error(u"Invalid ACPI 2.0 RSDP length\r\n"); > + return EFI_LOAD_ERROR; > + } > + if (!checksum_ok(rsdp, rsdp_len)) { > + error(u"Invalid ACPI 2.0 RSDP checksum\r\n"); > + return EFI_LOAD_ERROR; > + } > + } > + > + if (rsdp->revision >= ACPI_RSDP_REV_ACPI_2_0 && > + read_u64(&rsdp->xsdt_address)) { > + root_addr = read_u64(&rsdp->xsdt_address); > + use_xsdt = true; > + } else { > + root_addr = read_u32(&rsdp->rsdt_address); > + use_xsdt = false; > + } > + > + if (!root_addr) { > + error(u"Invalid RSDT/XSDT address\r\n"); > + return EFI_LOAD_ERROR; > + } > + > + root = (struct acpi_table_header *)root_addr; > + root_len = read_u32(&root->length); > + if (root_len < sizeof(*root)) { > + error(u"Invalid RSDT/XSDT length\r\n"); > + return EFI_LOAD_ERROR; > + } > + if (use_xsdt && memcmp(root->signature, "XSDT", 4)) { > + error(u"Invalid XSDT signature\r\n"); > + return EFI_LOAD_ERROR; > + } > + if (!use_xsdt && memcmp(root->signature, "RSDT", 4)) { > + error(u"Invalid RSDT signature\r\n"); > + return EFI_LOAD_ERROR; > + } > + if (!checksum_ok(root, root_len)) { > + error(u"Invalid RSDT/XSDT checksum\r\n"); > + return EFI_LOAD_ERROR; > + } > + > + entry_size = use_xsdt ? sizeof(u64) : sizeof(u32); > + if ((root_len - sizeof(*root)) % entry_size) { > + error(u"Invalid RSDT/XSDT entry list\r\n"); > + return EFI_LOAD_ERROR; > + } > + entries = (root_len - sizeof(*root)) / entry_size; > + /* RSDP + root + each root entry + up to DSDT/FACS per entry */ > + max_tables = 2 + 3 * entries; > + > + ret = bs->allocate_pool(EFI_LOADER_DATA, > + max_tables * sizeof(struct acpi_dump_table), > + (void **)&tables); > + if (ret != EFI_SUCCESS) { > + error(u"Out of memory\r\n"); > + return ret; > + } > + *table_count = 0; > + > + ret = add_table(tables, table_count, (uintptr_t)rsdp, rsdp_len, > "RSDP"); > + if (ret != EFI_SUCCESS) > + goto err_out; > + > + ret = add_table(tables, table_count, root_addr, root_len, > root->signature); > + if (ret != EFI_SUCCESS) > + goto err_out; > + > + for (i = 0; i < entries; ++i) { > + uintptr_t addr; > + struct acpi_table_header *table; > + u32 len; > + > + if (use_xsdt) { > + u64 *entry = (u64 *)((u8 *)root + sizeof(*root)); > + > + addr = read_u64(&entry[i]); > + } else { > + u32 *entry = (u32 *)((u8 *)root + sizeof(*root)); > + > + addr = read_u32(&entry[i]); > + } > + if (!addr) > + continue; > + if (has_table_addr(tables, *table_count, addr)) > + continue; > + > + table = (struct acpi_table_header *)addr; > + len = read_u32(&table->length); > + if (len < sizeof(*table)) { > + error(u"Invalid ACPI table length\r\n"); > + ret = EFI_LOAD_ERROR; > + goto err_out; > + } > + if (!checksum_ok(table, len)) { > + error(u"Invalid ACPI table checksum\r\n"); > + ret = EFI_LOAD_ERROR; > + goto err_out; > + } > + > + ret = add_table(tables, table_count, addr, len, > table->signature); > + if (ret != EFI_SUCCESS) > + goto err_out; > + > + /* > + * FADT (signature FACP) references DSDT and FACS outside > RSDT/XSDT. > + * Include them so output matches acpidump -b style > completeness. > + */ > + if (!memcmp(table->signature, "FACP", 4)) { > + struct acpi_fadt *fadt = (struct acpi_fadt *)table; > + uintptr_t dsdt_addr; > + uintptr_t facs_addr; > + > + dsdt_addr = read_u64(&fadt->x_dsdt); > + if (!dsdt_addr) > + dsdt_addr = read_u32(&fadt->dsdt); > + if (dsdt_addr && !has_table_addr(tables, *table_count, > + dsdt_addr)) { > + struct acpi_table_header *dsdt; > + u32 dsdt_len; > + > + dsdt = (struct acpi_table_header *)dsdt_addr; > + dsdt_len = read_u32(&dsdt->length); > + if (dsdt_len < sizeof(*dsdt)) { > + error(u"Invalid DSDT length\r\n"); > + ret = EFI_LOAD_ERROR; > + goto err_out; > + } > + if (!checksum_ok(dsdt, dsdt_len)) { > + error(u"Invalid DSDT checksum\r\n"); > + ret = EFI_LOAD_ERROR; > + goto err_out; > + } > + > + ret = add_table(tables, table_count, > dsdt_addr, dsdt_len, > + dsdt->signature); > + if (ret != EFI_SUCCESS) > + goto err_out; > + } > + > + facs_addr = read_u64(&fadt->x_firmware_ctrl); > + if (!facs_addr) > + facs_addr = read_u32(&fadt->firmware_ctrl); > + if (facs_addr && !has_table_addr(tables, *table_count, > + facs_addr)) { > + struct acpi_facs *facs; > + u32 facs_len; > + > + facs = (struct acpi_facs *)facs_addr; > + if (memcmp(facs->signature, "FACS", 4)) { > + error(u"Invalid FACS signature\r\n"); > + ret = EFI_LOAD_ERROR; > + goto err_out; > + } > + facs_len = read_u32(&facs->length); > + if (facs_len < sizeof(*facs)) { > + error(u"Invalid FACS length\r\n"); > + ret = EFI_LOAD_ERROR; > + goto err_out; > + } > + ret = add_table(tables, table_count, > facs_addr, facs_len, > + facs->signature); > + if (ret != EFI_SUCCESS) > + goto err_out; > + } > + } > + } > + > + *tablesp = tables; > + > + return EFI_SUCCESS; > + > +err_out: > + bs->free_pool(tables); > + return ret; > +} > + > +/** > + * save_file() - save file to EFI system partition > + * > + * @filename: file name > + * @buf: buffer to write > + * @size: size of the buffer > + */ > +static efi_status_t save_file(u16 *filename, void *buf, efi_uintn_t size) > +{ > + efi_uintn_t ret; > + struct efi_simple_file_system_protocol *file_system; > + struct efi_file_handle *root, *file; > + > + ret = open_file_system(&file_system); > + if (ret != EFI_SUCCESS) > + return ret; > + > + /* Open volume */ > + ret = file_system->open_volume(file_system, &root); > + if (ret != EFI_SUCCESS) { > + error(u"Failed to open volume\r\n"); > + return ret; > + } > + /* Check if file already exists */ > + ret = root->open(root, &file, filename, EFI_FILE_MODE_READ, 0); > + if (ret == EFI_SUCCESS) { > + file->close(file); > + print(u"Overwrite existing file (y/n)? "); > + ret = efi_input_yn(); > + print(u"\r\n"); > + if (ret != EFI_SUCCESS) { > + root->close(root); > + error(u"Aborted by user\r\n"); > + return ret; > + } > + } > + > + /* Create file */ > + ret = root->open(root, &file, filename, > + EFI_FILE_MODE_READ | EFI_FILE_MODE_WRITE | > + EFI_FILE_MODE_CREATE, EFI_FILE_ARCHIVE); > + if (ret == EFI_SUCCESS) { > + /* Write file */ > + ret = file->write(file, &size, buf); > + if (ret != EFI_SUCCESS) > + error(u"Failed to write file\r\n"); > + file->close(file); > + } else { > + error(u"Failed to open file\r\n"); > + } > + root->close(root); > + > + return ret; > +} > + > +/** > + * do_check() - parse ACPI tables and report success/failure > + * > + * Return: status code > + */ > +static efi_status_t do_check(void) > +{ > + struct acpi_dump_table *tables; > + u32 table_count; > + u16 num[11] = {0}; > + efi_status_t ret; > + > + ret = collect_tables(&tables, &table_count); > + if (ret != EFI_SUCCESS) > + return ret; > + > + if (!table_count) { > + print(u"No ACPI tables found\r\n"); > + return EFI_NOT_FOUND; > + } > + > + u32_to_utf16_dec(num, ARRAY_SIZE(num), table_count); > + > + print(u"ACPI tables found: "); > + print(num); > + print(u"\r\n"); > + > + bs->free_pool(tables); > + > + return EFI_SUCCESS; > +} > + > +/** > + * do_write() - ask filename and save ACPI table set > + * > + * Return: status code > + */ > +static efi_status_t do_write(void) > +{ > + struct acpi_dump_table *tables; > + u16 filename[BUFFER_SIZE]; > + char ascii_name[BUFFER_SIZE]; > + u32 table_count; > + u32 i; > + efi_status_t ret; > + > + ret = collect_tables(&tables, &table_count); > + if (ret != EFI_SUCCESS) > + return ret; > + if (!table_count) { > + print(u"No ACPI tables found\r\n"); > + bs->free_pool(tables); > + return EFI_NOT_FOUND; > + } > + > + for (i = 0; i < table_count; ++i) { > + u8 *buf; > + u32 instance = 0; > + u32 same_type = 0; > + u32 j; > + > + for (j = 0; j < table_count; ++j) { > + if (!memcmp(tables[i].signature, tables[j].signature, > 4)) > + ++same_type; > + } > + > + if (same_type > 1) { > + /* Number duplicates starting at 1 for the first > instance. */ > + for (j = 0; j <= i; ++j) { > + if (!memcmp(tables[i].signature, > tables[j].signature, 4)) > + ++instance; > + } > + } > + > + build_table_filename(tables[i].signature, instance, > ascii_name, > + ARRAY_SIZE(ascii_name)); > + ascii_to_utf16(filename, ARRAY_SIZE(filename), ascii_name); > + > + ret = bs->allocate_pool(EFI_LOADER_DATA, tables[i].len, > + (void **)&buf); > + if (ret != EFI_SUCCESS) { > + error(u"Out of memory\r\n"); > + break; > + } > + > + memcpy(buf, (void *)tables[i].addr, tables[i].len); > + ret = save_file(filename, buf, tables[i].len); > + if (ret == EFI_SUCCESS) { > + print(filename); > + print(u" written\r\n"); > + } > + > + bs->free_pool(buf); > + if (ret != EFI_SUCCESS) > + break; > + } > + > + bs->free_pool(tables); > + > + return ret; > +} > + > +/** > + * get_load_options() - get load options > + * > + * Return: load options or NULL > + */ > +static u16 *get_load_options(void) > +{ > + efi_status_t ret; > + struct efi_loaded_image *loaded_image; > + > + ret = bs->open_protocol(handle, &loaded_image_guid, > + (void **)&loaded_image, NULL, NULL, > + EFI_OPEN_PROTOCOL_GET_PROTOCOL); > + if (ret != EFI_SUCCESS) { > + error(u"Loaded image protocol not found\r\n"); > + return NULL; > + } > + > + if (!loaded_image->load_options_size || !loaded_image->load_options) > + return NULL; > + > + return loaded_image->load_options; > +} > + > +/** > + * command_loop() - process user commands > + */ > +static void command_loop(void) > +{ > + for (;;) { > + u16 command[BUFFER_SIZE]; > + u16 *pos; > + efi_status_t ret; > + > + print(u"=> "); > + ret = efi_input(command, ARRAY_SIZE(command)); > + if (ret == EFI_ABORTED) > + break; > + pos = skip_whitespace(command); > + if (starts_with(pos, u"exit")) { > + break; > + } else if (starts_with(pos, u"check")) { > + ret = do_check(); > + if (ret == EFI_SUCCESS) > + print(u"OK\r\n"); > + } else if (starts_with(pos, u"write")) { > + do_write(); > + } else { > + do_help(); > + } > + } > +} > + > +/** > + * efi_main() - entry point of the EFI application. > + * > + * @handle: handle of the loaded image > + * @systab: system table > + * Return: status code > + */ > +efi_status_t EFIAPI efi_main(efi_handle_t image_handle, > + struct efi_system_table *systab) > +{ > + u16 *load_options; > + > + handle = image_handle; > + systable = systab; > + cout = systable->con_out; > + cin = systable->con_in; > + bs = systable->boottime; > + load_options = get_load_options(); > + > + if (starts_with(load_options, u"nocolor")) > + nocolor = true; > + > + color(EFI_WHITE); > + cls(); > + print(u"ACPI Dump\r\n=========\r\n\r\n"); > + color(EFI_LIGHTBLUE); > + > + command_loop(); > + > + color(EFI_LIGHTGRAY); > + cls(); > + > + return EFI_SUCCESS; > +} > -- > 2.53.0 >
