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path: root/drivers/acpi/executer/exmisc.c
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Diffstat (limited to 'drivers/acpi/executer/exmisc.c')
-rw-r--r--drivers/acpi/executer/exmisc.c25
1 files changed, 20 insertions, 5 deletions
diff --git a/drivers/acpi/executer/exmisc.c b/drivers/acpi/executer/exmisc.c
index 48c18d29222a..bd98aab017cf 100644
--- a/drivers/acpi/executer/exmisc.c
+++ b/drivers/acpi/executer/exmisc.c
@@ -72,7 +72,7 @@ acpi_ex_get_object_reference(union acpi_operand_object *obj_desc,
union acpi_operand_object *reference_obj;
union acpi_operand_object *referenced_obj;
- ACPI_FUNCTION_TRACE_PTR("ex_get_object_reference", obj_desc);
+ ACPI_FUNCTION_TRACE_PTR(ex_get_object_reference, obj_desc);
*return_desc = NULL;
@@ -168,7 +168,7 @@ acpi_ex_concat_template(union acpi_operand_object *operand0,
acpi_size length1;
acpi_size new_length;
- ACPI_FUNCTION_TRACE("ex_concat_template");
+ ACPI_FUNCTION_TRACE(ex_concat_template);
/*
* Find the end_tag descriptor in each resource template.
@@ -250,7 +250,7 @@ acpi_ex_do_concatenate(union acpi_operand_object *operand0,
char *new_buf;
acpi_status status;
- ACPI_FUNCTION_TRACE("ex_do_concatenate");
+ ACPI_FUNCTION_TRACE(ex_do_concatenate);
/*
* Convert the second operand if necessary. The first operand
@@ -445,10 +445,24 @@ acpi_ex_do_math_op(u16 opcode, acpi_integer integer0, acpi_integer integer1)
case AML_SHIFT_LEFT_OP: /* shift_left (Operand, shift_count, Result) */
+ /*
+ * We need to check if the shiftcount is larger than the integer bit
+ * width since the behavior of this is not well-defined in the C language.
+ */
+ if (integer1 >= acpi_gbl_integer_bit_width) {
+ return (0);
+ }
return (integer0 << integer1);
case AML_SHIFT_RIGHT_OP: /* shift_right (Operand, shift_count, Result) */
+ /*
+ * We need to check if the shiftcount is larger than the integer bit
+ * width since the behavior of this is not well-defined in the C language.
+ */
+ if (integer1 >= acpi_gbl_integer_bit_width) {
+ return (0);
+ }
return (integer0 >> integer1);
case AML_SUBTRACT_OP: /* Subtract (Integer0, Integer1, Result) */
@@ -489,7 +503,7 @@ acpi_ex_do_logical_numeric_op(u16 opcode,
acpi_status status = AE_OK;
u8 local_result = FALSE;
- ACPI_FUNCTION_TRACE("ex_do_logical_numeric_op");
+ ACPI_FUNCTION_TRACE(ex_do_logical_numeric_op);
switch (opcode) {
case AML_LAND_OP: /* LAnd (Integer0, Integer1) */
@@ -557,7 +571,7 @@ acpi_ex_do_logical_op(u16 opcode,
u8 local_result = FALSE;
int compare;
- ACPI_FUNCTION_TRACE("ex_do_logical_op");
+ ACPI_FUNCTION_TRACE(ex_do_logical_op);
/*
* Convert the second operand if necessary. The first operand
@@ -649,6 +663,7 @@ acpi_ex_do_logical_op(u16 opcode,
/* Length and all bytes must be equal */
if ((length0 == length1) && (compare == 0)) {
+
/* Length and all bytes match ==> TRUE */
local_result = TRUE;