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ACPICA: Dump table header - suppress output of non-printable characters 

Function acpi_tb_print_table_header. Some ACPI tables contain
non-printable characters in one of the string fields of the the
header - Signature, OemId, OemTableId, or CompilerId. Invalid
characters are replaced by '?'. ACPICA BZ 788.

http://acpica.org/bugzilla/show_bug.cgi?id=788

Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Bob Moore 2009-06-24 11:38:46 +08:00 committed by Len Brown
parent 8e4319c425
commit cf02cd47d4
1 changed files with 75 additions and 7 deletions
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82
drivers/acpi/acpica/tbutils.c
View File

@ -49,6 +49,12 @@
ACPI_MODULE_NAME("tbutils")
/* Local prototypes */
static void acpi_tb_fix_string(char *string, acpi_size length);
static void
acpi_tb_cleanup_table_header(struct acpi_table_header *out_header,
struct acpi_table_header *header);
static acpi_physical_address
acpi_tb_get_root_table_entry(u8 *table_entry, u32 table_entry_size);
@ -159,6 +165,59 @@ u8 acpi_tb_tables_loaded(void)
return (FALSE);
}
/*******************************************************************************
*
* FUNCTION: acpi_tb_fix_string
*
* PARAMETERS: String - String to be repaired
* Length - Maximum length
*
* RETURN: None
*
* DESCRIPTION: Replace every non-printable or non-ascii byte in the string
* with a question mark '?'.
*
******************************************************************************/
static void acpi_tb_fix_string(char *string, acpi_size length)
{
while (length && *string) {
if (!ACPI_IS_PRINT(*string)) {
*string = '?';
}
string++;
length--;
}
}
/*******************************************************************************
*
* FUNCTION: acpi_tb_cleanup_table_header
*
* PARAMETERS: out_header - Where the cleaned header is returned
* Header - Input ACPI table header
*
* RETURN: Returns the cleaned header in out_header
*
* DESCRIPTION: Copy the table header and ensure that all "string" fields in
* the header consist of printable characters.
*
******************************************************************************/
static void
acpi_tb_cleanup_table_header(struct acpi_table_header *out_header,
struct acpi_table_header *header)
{
ACPI_MEMCPY(out_header, header, sizeof(struct acpi_table_header));
acpi_tb_fix_string(out_header->signature, ACPI_NAME_SIZE);
acpi_tb_fix_string(out_header->oem_id, ACPI_OEM_ID_SIZE);
acpi_tb_fix_string(out_header->oem_table_id, ACPI_OEM_TABLE_ID_SIZE);
acpi_tb_fix_string(out_header->asl_compiler_id, ACPI_NAME_SIZE);
}
/*******************************************************************************
*
* FUNCTION: acpi_tb_print_table_header
@ -176,6 +235,7 @@ void
acpi_tb_print_table_header(acpi_physical_address address,
struct acpi_table_header *header)
{
struct acpi_table_header local_header;
/*
* The reason that the Address is cast to a void pointer is so that we
@ -192,6 +252,11 @@ acpi_tb_print_table_header(acpi_physical_address address,
/* RSDP has no common fields */
ACPI_MEMCPY(local_header.oem_id,
ACPI_CAST_PTR(struct acpi_table_rsdp,
header)->oem_id, ACPI_OEM_ID_SIZE);
acpi_tb_fix_string(local_header.oem_id, ACPI_OEM_ID_SIZE);
ACPI_INFO((AE_INFO, "RSDP %p %05X (v%.2d %6.6s)",
ACPI_CAST_PTR (void, address),
(ACPI_CAST_PTR(struct acpi_table_rsdp, header)->
@ -200,18 +265,21 @@ acpi_tb_print_table_header(acpi_physical_address address,
header)->length : 20,
ACPI_CAST_PTR(struct acpi_table_rsdp,
header)->revision,
ACPI_CAST_PTR(struct acpi_table_rsdp,
header)->oem_id));
local_header.oem_id));
} else {
/* Standard ACPI table with full common header */
acpi_tb_cleanup_table_header(&local_header, header);
ACPI_INFO((AE_INFO,
"%4.4s %p %05X (v%.2d %6.6s %8.8s %08X %4.4s %08X)",
header->signature, ACPI_CAST_PTR (void, address),
header->length, header->revision, header->oem_id,
header->oem_table_id, header->oem_revision,
header->asl_compiler_id,
header->asl_compiler_revision));
local_header.signature, ACPI_CAST_PTR(void, address),
local_header.length, local_header.revision,
local_header.oem_id, local_header.oem_table_id,
local_header.oem_revision,
local_header.asl_compiler_id,
local_header.asl_compiler_revision));
}
}