Indicate to the assembler the start of a code section.
[Syntax]
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Symbol field
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Operand field
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Comment field
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[section-name]
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.cseg
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[relocation-attribute]
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[; comment]
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[Function]
- | The .cseg directive indicates to the assembler the start of a code section. |
- | All instructions described following the .cseg directive belong to the code section until it comes across a section definition directives. |
[Use]
- | The .cseg directive is used to describe instructions, .db, .dw directives, etc. in the code section defined by the .cseg directive. |
- | Description of one functional unit such as a subroutine should be defined as a single code section. |
[Description]
- | The start address of a code section can be specified with the .org directive. |
- | A relocation attribute defines a range of location addresses for a code section. |
Table 5.8 | Relocation Attributes of .cseg |
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TEXT
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Allocates the program.
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.text
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2
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PCTEXT
[V1.07.00 or later]
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Allocates position-independent programs.
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.pctext
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2
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ZCONST
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This section is for constant (read-only) data. It allocates a memory range (up to 32 Kbytes, in the positive direction from r0), referenced with 1 instruction using r0 and 16-bit displacement.
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.zconst
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4
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ZCONST23
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This section is for constant (read-only) data. It allocates a memory range (up to 4 Mbytes, in the positive direction from r0), referenced with 1 instruction using r0 and 23-bit displacement.
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.zconst23
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4
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CONST
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This section is for constant (read-only) data. It allocates a memory range (up to 4 Gbytes, in the positive direction from r0), referenced with 2 instructions using r0 and 32-bit displacement.
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.const
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4
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PCCONST16
[V1.07.00 or later]
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This section is for position-independent constant data (read-only). It allocates a memory range (up to ±32 Kbytes from __pc_data) referenced with 1 instruction using 16-bit displacement from the __pc_data symbol.
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.pcconst16
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4
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PCCONST23
[V1.07.00 or later]
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This section is for position-independent constant data (read-only). It allocates a memory range (up to ±4 Mbytes from __pc_data) referenced with 1 instruction using 23-bit displacement from the __pc_data symbol.
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.pcconst23
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4
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PCCONST32
[V1.07.00 or later]
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This section is for position-independent constant data (read-only). It allocates a memory range referenced with 2 instructions using 32-bit displacement from the __pc_data symbol.
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.pcconst32
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4
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- | An error will occur in any of the following cases. |
- | If TEXT is specified when the -pic option has been specified |
- | If PCTEXT is specified when the -pic option has not been specified |
- | If CONST, ZCONST, or ZCONST23 is specified when the -pirod option has been specified |
- | If PCCONST16, PCCONST23, or PCCONST32 is specified when the -pirod option has not been specified |
- | The allocation section of instructions or data when no symbol definition directive has been written is the ".text” section if the -pic option has not been specified and the ".pctext” section if the -pic option has been specified. |
- | By describing a section name in the symbol field of the .cseg directive, the code section can be named. If no section name is specified for a code section, the assembler will automatically give a default section name to the code section.
The default section names of the code sections are shown below. |
- | The default section names have the relocation attributes shown above. Giving them any other attributes is not possible. |
- | The following characters are usable in section names. |
- | Alphanumeric characters (0-9, a-z, A-Z) |
- | Special characters (@, _, .) |