The flags operand specifies one or more flag attributes of a section. The flags operand is a string constant composed of one or more characters. Table Section Flag Characters lists the valid flag characters. The flags operand is case-sensitive. The assembler does not detect invalid specifications made by the programmer, such as stores to a section that is a non-writable section. A non-writable section is not flagged by the w flag character.
Section Flag Characters |
|
Flag Characters |
Description |
|
w |
Write access allowed. |
|
a |
Section is allocated in memory. |
|
x |
Section contains executable instructions. |
|
s |
Section contains "short" data. |
|
o |
Section adds ordering requirement. The 'o' flag is only for ELF (Unix*) files. |
The type operand specifies a section’s type attribute. The type operand is a string constant containing one of the valid section types listed in Table Section Types. The section types listed in the table correspond directly to ELF (UNIX*) section types, except for the "comdat" section type, which corresponds to COFF32 (Windows NT). The type operand is case-sensitive.
Section Types |
|
Section Type |
Description |
|
"progbits" |
Sections with initialized data or code. |
|
"nobits" |
Sections with uninitialized data (bss). |
|
"comdat" |
COMDAT sections, Windows NT specific. See Windows NT (COFF32) Specific Section Flag Operands. |
|
"note" |
Note sections. |