From: Bob Moore <robert.moore@xxxxxxxxx> ACPICA commit e3574138af82a25d76324559848689946982dbd0 1) Allow whitespace in string before the constant 2) ut_strtoul64 now always creates a 64-bit integer; iASL will truncate this to the lower 32-bits if the table being compiled is a 32-bit table (DSDT revision less than 2). Link: https://github.com/acpica/acpica/commit/e3574138 Signed-off-by: Bob Moore <robert.moore@xxxxxxxxx> Signed-off-by: Erik Schmauss <erik.schmauss@xxxxxxxxx> --- drivers/acpi/acpica/acutils.h | 2 ++ drivers/acpi/acpica/utstrsuppt.c | 25 ++++++++++++++ drivers/acpi/acpica/utstrtoul64.c | 72 +++++++++++++++++++++++++++------------ 3 files changed, 78 insertions(+), 21 deletions(-) diff --git a/drivers/acpi/acpica/acutils.h b/drivers/acpi/acpica/acutils.h index 7a568c604a75..83b75e9db7ef 100644 --- a/drivers/acpi/acpica/acutils.h +++ b/drivers/acpi/acpica/acutils.h @@ -211,6 +211,8 @@ acpi_status acpi_ut_convert_decimal_string(char *string, u64 *return_value_ptr); acpi_status acpi_ut_convert_hex_string(char *string, u64 *return_value_ptr); +char acpi_ut_remove_whitespace(char **string); + char acpi_ut_remove_leading_zeros(char **string); u8 acpi_ut_detect_hex_prefix(char **string); diff --git a/drivers/acpi/acpica/utstrsuppt.c b/drivers/acpi/acpica/utstrsuppt.c index e402cf7cbd4b..bec2b8e1693e 100644 --- a/drivers/acpi/acpica/utstrsuppt.c +++ b/drivers/acpi/acpica/utstrsuppt.c @@ -231,6 +231,31 @@ char acpi_ut_remove_leading_zeros(char **string) /******************************************************************************* * + * FUNCTION: acpi_ut_remove_whitespace + * + * PARAMETERS: string - Pointer to input ASCII string + * + * RETURN: Next character after any whitespace. This character may be + * used by the caller to detect end-of-string. + * + * DESCRIPTION: Remove any leading whitespace in the input string. Return the + * next character after the final ASCII zero to enable the caller + * to check for the end of the string (NULL terminator). + * + ******************************************************************************/ + +char acpi_ut_remove_whitespace(char **string) +{ + + while (isspace((u8)**string)) { + *string += 1; + } + + return (**string); +} + +/******************************************************************************* + * * FUNCTION: acpi_ut_detect_hex_prefix * * PARAMETERS: string - Pointer to input ASCII string diff --git a/drivers/acpi/acpica/utstrtoul64.c b/drivers/acpi/acpica/utstrtoul64.c index 67a39d97a6d6..e2067dcb9389 100644 --- a/drivers/acpi/acpica/utstrtoul64.c +++ b/drivers/acpi/acpica/utstrtoul64.c @@ -66,22 +66,25 @@ ACPI_MODULE_NAME("utstrtoul64") * iASL - Main parser, conversion of constants to integers * iASL - Data Table Compiler parser (constants and math expressions) * interpreter - Implicit and explicit conversions, GPE method names + * interpreter - Repair code for return values from predefined names * debugger - Command line input string conversion - * acpi_dump - Input table addresses - * acpi_exec - Testing of the acpi_ut_strtoul64 function + * acpi_dump - ACPI table physical addresses + * acpi_exec - Support for namespace overrides * * Notes concerning users of these interfaces: * - * acpi_gbl_integer_byte_width is used to set the 32/64 bit limit. This global - * must be set to the proper width. For the core ACPICA code, the width - * depends on the DSDT version. For iASL, the default width is 64 bits for - * all parsers, but error checking is performed later to flag cases where - * a 64-bit constant is wrongly defined in a 32-bit DSDT/SSDT. + * acpi_gbl_integer_byte_width is used to set the 32/64 bit limit for explicit + * and implicit conversions. This global must be set to the proper width. + * For the core ACPICA code, the width depends on the DSDT version. For the + * acpi_ut_strtoul64 interface, all conversions are 64 bits. This interface is + * used primarily for iASL, where the default width is 64 bits for all parsers, + * but error checking is performed later to flag cases where a 64-bit constant + * is wrongly defined in a 32-bit DSDT/SSDT. * - * In ACPI, the only place where octal numbers are supported is within - * the ASL language itself. This is implemented via the main acpi_ut_strtoul64 - * interface. According the ACPI specification, there is no ACPI runtime - * support for octal string conversions. + * In ACPI, the only place where octal numbers are supported is within + * the ASL language itself. This is implemented via the main acpi_ut_strtoul64 + * interface. According the ACPI specification, there is no ACPI runtime + * support (explicit/implicit) for octal string conversions. * ******************************************************************************/ /******************************************************************************* @@ -93,11 +96,11 @@ ACPI_MODULE_NAME("utstrtoul64") * return_value - Where the converted integer is * returned. Must be a valid pointer * - * RETURN: Status and converted integer - * Returns an exception on numeric overflow + * RETURN: Status and converted integer. Returns an exception on a + * 64-bit numeric overflow * - * DESCRIPTION: Convert a string into an unsigned integer. Performs either a - * 32-bit or 64-bit conversion, depending on the current global + * DESCRIPTION: Convert a string into an unsigned integer. Always performs a + * full 64-bit conversion, regardless of the current global * integer width. Supports Decimal, Hex, and Octal strings. * * Current users of this function: @@ -105,11 +108,15 @@ ACPI_MODULE_NAME("utstrtoul64") * iASL - Preprocessor (constants and math expressions) * iASL - Main ASL parser, conversion of ASL constants to integers * iASL - Data Table Compiler parser (constants and math expressions) + * interpreter - Repair code for return values from predefined names + * acpi_dump - ACPI table physical addresses + * acpi_exec - Support for namespace overrides * ******************************************************************************/ acpi_status acpi_ut_strtoul64(char *string, u64 *return_value) { acpi_status status = AE_OK; + u8 original_bit_width; u32 base = 10; /* Default is decimal */ ACPI_FUNCTION_TRACE_STR(ut_strtoul64, string); @@ -122,6 +129,10 @@ acpi_status acpi_ut_strtoul64(char *string, u64 *return_value) return_ACPI_STATUS(AE_OK); } + if (!acpi_ut_remove_whitespace(&string)) { + return_ACPI_STATUS(AE_OK); + } + /* * 1) Check for a hex constant. A "0x" prefix indicates base 16. */ @@ -142,8 +153,16 @@ acpi_status acpi_ut_strtoul64(char *string, u64 *return_value) } /* - * Perform the base 8, 10, or 16 conversion. A numeric overflow will - * return an exception (to allow iASL to flag the statement). + * Force a full 64-bit conversion. The caller (usually iASL) must + * check for a 32-bit overflow later as necessary (If current mode + * is 32-bit, meaning a 32-bit DSDT). + */ + original_bit_width = acpi_gbl_integer_bit_width; + acpi_gbl_integer_bit_width = 64; + + /* + * Perform the base 8, 10, or 16 conversion. A 64-bit numeric overflow + * will return an exception (to allow iASL to flag the statement). */ switch (base) { case 8: @@ -160,6 +179,9 @@ acpi_status acpi_ut_strtoul64(char *string, u64 *return_value) break; } + /* Only possible exception from above is a 64-bit overflow */ + + acpi_gbl_integer_bit_width = original_bit_width; return_ACPI_STATUS(status); } @@ -223,6 +245,10 @@ u64 acpi_ut_implicit_strtoul64(char *string) ACPI_FUNCTION_TRACE_STR(ut_implicit_strtoul64, string); + if (!acpi_ut_remove_whitespace(&string)) { + return_VALUE(0); + } + /* * Per the ACPI specification, only hexadecimal is supported for * implicit conversions, and the "0x" prefix is "not allowed". @@ -236,8 +262,8 @@ u64 acpi_ut_implicit_strtoul64(char *string) /* * Ignore overflow as per the ACPI specification. This is implemented by - * ignoring the return status below. On overflow, the input string is - * simply truncated. + * ignoring the return status from the conversion function called below. + * On overflow, the input string is simply truncated. */ acpi_ut_convert_hex_string(string, &converted_integer); return_VALUE(converted_integer); @@ -301,6 +327,10 @@ u64 acpi_ut_explicit_strtoul64(char *string) ACPI_FUNCTION_TRACE_STR(ut_explicit_strtoul64, string); + if (!acpi_ut_remove_whitespace(&string)) { + return_VALUE(0); + } + /* * Only Hex and Decimal are supported, as per the ACPI specification. * A "0x" prefix indicates hex; otherwise decimal is assumed. @@ -315,8 +345,8 @@ u64 acpi_ut_explicit_strtoul64(char *string) /* * Ignore overflow as per the ACPI specification. This is implemented by - * ignoring the return status below. On overflow, the input string is - * simply truncated. + * ignoring the return status from the conversion functions called below. + * On overflow, the input string is simply truncated. */ switch (base) { case 10: -- 2.13.6 -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
