gcc.info: Uninitialized Data
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Output of Uninitialized Variables
Each of the macros in this section is used to do the whole job of
outputting a single uninitialized variable.
`ASM_OUTPUT_COMMON (STREAM, NAME, SIZE, ROUNDED)'
A C statement (sans semicolon) to output to the stdio stream
STREAM the assembler definition of a common-label named NAME whose
size is SIZE bytes. The variable ROUNDED is the size rounded up
to whatever alignment the caller wants.
Use the expression `assemble_name (STREAM, NAME)' to output the
name itself; before and after that, output the additional
assembler syntax for defining the name, and a newline.
This macro controls how the assembler definitions of uninitialized
common global variables are output.
`ASM_OUTPUT_ALIGNED_COMMON (STREAM, NAME, SIZE, ALIGNMENT)'
Like `ASM_OUTPUT_COMMON' except takes the required alignment as a
separate, explicit argument. If you define this macro, it is used
in place of `ASM_OUTPUT_COMMON', and gives you more flexibility in
handling the required alignment of the variable. The alignment is
specified as the number of bits.
`ASM_OUTPUT_ALIGNED_DECL_COMMON (STREAM, DECL, NAME, SIZE, ALIGNMENT)'
Like `ASM_OUTPUT_ALIGNED_COMMON' except that DECL of the variable
to be output, if there is one, or `NULL_TREE' if there is not
corresponding variable. If you define this macro, GNU CC wil use
it in place of both `ASM_OUTPUT_COMMON' and
`ASM_OUTPUT_ALIGNED_COMMON'. Define this macro when you need to
see the variable's decl in order to chose what to output.
`ASM_OUTPUT_SHARED_COMMON (STREAM, NAME, SIZE, ROUNDED)'
If defined, it is similar to `ASM_OUTPUT_COMMON', except that it
is used when NAME is shared. If not defined, `ASM_OUTPUT_COMMON'
will be used.
`ASM_OUTPUT_BSS (STREAM, DECL, NAME, SIZE, ROUNDED)'
A C statement (sans semicolon) to output to the stdio stream
STREAM the assembler definition of uninitialized global DECL named
NAME whose size is SIZE bytes. The variable ROUNDED is the size
rounded up to whatever alignment the caller wants.
Try to use function `asm_output_bss' defined in `varasm.c' when
defining this macro. If unable, use the expression `assemble_name
(STREAM, NAME)' to output the name itself; before and after that,
output the additional assembler syntax for defining the name, and
a newline.
This macro controls how the assembler definitions of uninitialized
global variables are output. This macro exists to properly
support languages like `c++' which do not have `common' data.
However, this macro currently is not defined for all targets. If
this macro and `ASM_OUTPUT_ALIGNED_BSS' are not defined then
`ASM_OUTPUT_COMMON' or `ASM_OUTPUT_ALIGNED_COMMON' or
`ASM_OUTPUT_ALIGNED_DECL_COMMON' is used.
`ASM_OUTPUT_ALIGNED_BSS (STREAM, DECL, NAME, SIZE, ALIGNMENT)'
Like `ASM_OUTPUT_BSS' except takes the required alignment as a
separate, explicit argument. If you define this macro, it is used
in place of `ASM_OUTPUT_BSS', and gives you more flexibility in
handling the required alignment of the variable. The alignment is
specified as the number of bits.
Try to use function `asm_output_aligned_bss' defined in file
`varasm.c' when defining this macro.
`ASM_OUTPUT_SHARED_BSS (STREAM, DECL, NAME, SIZE, ROUNDED)'
If defined, it is similar to `ASM_OUTPUT_BSS', except that it is
used when NAME is shared. If not defined, `ASM_OUTPUT_BSS' will
be used.
`ASM_OUTPUT_LOCAL (STREAM, NAME, SIZE, ROUNDED)'
A C statement (sans semicolon) to output to the stdio stream
STREAM the assembler definition of a local-common-label named NAME
whose size is SIZE bytes. The variable ROUNDED is the size
rounded up to whatever alignment the caller wants.
Use the expression `assemble_name (STREAM, NAME)' to output the
name itself; before and after that, output the additional
assembler syntax for defining the name, and a newline.
This macro controls how the assembler definitions of uninitialized
static variables are output.
`ASM_OUTPUT_ALIGNED_LOCAL (STREAM, NAME, SIZE, ALIGNMENT)'
Like `ASM_OUTPUT_LOCAL' except takes the required alignment as a
separate, explicit argument. If you define this macro, it is used
in place of `ASM_OUTPUT_LOCAL', and gives you more flexibility in
handling the required alignment of the variable. The alignment is
specified as the number of bits.
`ASM_OUTPUT_ALIGNED_DECL_LOCAL (STREAM, DECL, NAME, SIZE, ALIGNMENT)'
Like `ASM_OUTPUT_ALIGNED_DECL' except that DECL of the variable to
be output, if there is one, or `NULL_TREE' if there is not
corresponding variable. If you define this macro, GNU CC wil use
it in place of both `ASM_OUTPUT_DECL' and
`ASM_OUTPUT_ALIGNED_DECL'. Define this macro when you need to see
the variable's decl in order to chose what to output.
`ASM_OUTPUT_SHARED_LOCAL (STREAM, NAME, SIZE, ROUNDED)'
If defined, it is similar to `ASM_OUTPUT_LOCAL', except that it is
used when NAME is shared. If not defined, `ASM_OUTPUT_LOCAL' will
be used.
Created Wed Sep 1 16:42:25 2004 on bee with info_to_html version 0.9.6.