This directive is most useful for manipulating counters:. Following are descriptions of the parameters used with the. Options are not case sensitive. These directives are used with the compiler --symdebug:dwarf -g option to generate debug information for assembly functions. At link time, the linker looks for the symbol's definition in other modules.
If a defined global symbol has more than one definition, an error occurs. See for more information on macros and macro libraries. The named symbol will removed from the substitution symbol table from the point of the. A symbol is created in place of the common symbol to refer to its reserved location. An element can also be a complete declaration of a nested structure or union, or a structure or union declared by its tag. If all of the operands for an operator are absolute values, the expression using the operator is an absolute value. If the expression is relocatable, the symbol to which it is assigned is also relocatable.
This directive is designed to convey different types of information, so the type, data pair is used to represent each type. Default bindings of the symbol are overridden by the. It can be used in macro definitions to suppress the listing of the macro expansion. If a field will not fit in the space remaining in the current word,. X produces a cross-reference listing of symbols. Assembly language is converted into executable machine code by a utility program referred to as an assembler; the conversion process is referred to as assembly, or assembling the code.
The linker resolves this symbol's definition at link time. It increments the error count and prevents the assembler from producing an object file. Operands must fit on a single source statement line. You can reset the page width with another. A global symbol is defined in the same manner as any other symbol; that is, it appears as a label or is defined by the. General Includes in the listing file conditional source lines skipped by the preprocessor.
The substitution symbol is up to 128 characters long and must begin with a letter. If val is omitted, it defaults to 0. The assembler can provide a similar multiple-definition error for local symbols. Labels are the simplest examples of relocatable values. In contrast, initialized variables need to reference a section that contains the initialized data. These directives are to be used only by the compiler; do not attempt to use these directives.
L limits the listing of. Register indirect with displacement addressing is also commonly used when accessing items on the runtime stack e. If one of these macros is called, the assembler extracts the library entry and loads it into the macro table. These directives allow you to define your own error and warning messages. This parameter can only be used with a top-level union.
See the for information on conditional blocks. If a global symbol is defined more than once, the linker issues a multiple-definition error. It cannot be used when defining a nested union. Outputs the message text during assembling. This parameter can only be used with a top-level union. Absolute values do not depend on where your program is loaded into memory. Labels are the simplest examples of relocatable values.
This guarantees that data resides on a 16-bit boundary. Example using 68000 syntax : ArraySize: equ 10 TheArray: ds. An element can also be a complete declaration of a nested structure or union, or a structure or union declared by its tag. It does not, however, set the error or warning counts, and it does not prevent the assembler from producing an object file. The filename must follow host operating system conventions; it can be enclosed in double quotes.
The assembler determines whether instructions are 16- or 32-bit instructions based on the syntax structure of the code. Size is measured in bytes and must be a positive integer. If you use a label, it points to the location of the first byte that is initialized. The structure or union tag of a. By default, all conditional blocks are listed; the assembler acts as if the.