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@ -1265,7 +1265,7 @@ undefined symbols in the link. |
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@kindex --sort-common |
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@kindex --sort-common |
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This option tells @code{ld} to sort the common symbols by size when it |
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This option tells @code{ld} to sort the common symbols by size when it |
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places them in the appropriate output sections. First come all the one |
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places them in the appropriate output sections. First come all the one |
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byte symbols, then all the two bytes, then all the four bytes, and then |
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byte symbols, then all the two byte, then all the four byte, and then |
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everything else. This is to prevent gaps between symbols due to |
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everything else. This is to prevent gaps between symbols due to |
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alignment constraints. |
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alignment constraints. |
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@ -2781,16 +2781,16 @@ You may use the @code{FILL} command to set the fill pattern for the |
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current section. It is followed by an expression in parentheses. Any |
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current section. It is followed by an expression in parentheses. Any |
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otherwise unspecified regions of memory within the section (for example, |
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otherwise unspecified regions of memory within the section (for example, |
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gaps left due to the required alignment of input sections) are filled |
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gaps left due to the required alignment of input sections) are filled |
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with the two least significant bytes of the expression, repeated as |
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with the four least significant bytes of the expression, repeated as |
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necessary. A @code{FILL} statement covers memory locations after the |
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necessary. A @code{FILL} statement covers memory locations after the |
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point at which it occurs in the section definition; by including more |
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point at which it occurs in the section definition; by including more |
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than one @code{FILL} statement, you can have different fill patterns in |
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than one @code{FILL} statement, you can have different fill patterns in |
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different parts of an output section. |
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different parts of an output section. |
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This example shows how to fill unspecified regions of memory with the |
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This example shows how to fill unspecified regions of memory with the |
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value @samp{0x9090}: |
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value @samp{0x90}: |
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@smallexample |
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@smallexample |
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FILL(0x9090) |
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FILL(0x90909090) |
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@end smallexample |
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@end smallexample |
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The @code{FILL} command is similar to the @samp{=@var{fillexp}} output |
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The @code{FILL} command is similar to the @samp{=@var{fillexp}} output |
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@ -3076,7 +3076,7 @@ You can set the fill pattern for an entire section by using |
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@samp{=@var{fillexp}}. @var{fillexp} is an expression |
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@samp{=@var{fillexp}}. @var{fillexp} is an expression |
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(@pxref{Expressions}). Any otherwise unspecified regions of memory |
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(@pxref{Expressions}). Any otherwise unspecified regions of memory |
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within the output section (for example, gaps left due to the required |
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within the output section (for example, gaps left due to the required |
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alignment of input sections) will be filled with the two least |
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alignment of input sections) will be filled with the four least |
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significant bytes of the value, repeated as necessary. |
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significant bytes of the value, repeated as necessary. |
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You can also change the fill value with a @code{FILL} command in the |
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You can also change the fill value with a @code{FILL} command in the |
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@ -3085,7 +3085,7 @@ output section commands; see @ref{Output Section Data}. |
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Here is a simple example: |
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Here is a simple example: |
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@smallexample |
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@smallexample |
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@group |
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@group |
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SECTIONS @{ .text : @{ *(.text) @} =0x9090 @} |
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SECTIONS @{ .text : @{ *(.text) @} =0x90909090 @} |
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@end group |
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@end group |
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@end smallexample |
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@end smallexample |
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@ -3728,7 +3728,7 @@ SECTIONS |
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file2(.text) |
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file2(.text) |
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. += 1000; |
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. += 1000; |
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file3(.text) |
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file3(.text) |
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@} = 0x1234; |
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@} = 0x12345678; |
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@} |
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@} |
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@end smallexample |
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@end smallexample |
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@noindent |
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@noindent |
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@ -3736,7 +3736,7 @@ In the previous example, the @samp{.text} section from @file{file1} is |
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located at the beginning of the output section @samp{output}. It is |
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located at the beginning of the output section @samp{output}. It is |
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followed by a 1000 byte gap. Then the @samp{.text} section from |
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followed by a 1000 byte gap. Then the @samp{.text} section from |
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@file{file2} appears, also with a 1000 byte gap following before the |
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@file{file2} appears, also with a 1000 byte gap following before the |
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@samp{.text} section from @file{file3}. The notation @samp{= 0x1234} |
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@samp{.text} section from @file{file3}. The notation @samp{= 0x12345678} |
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specifies what data to write in the gaps (@pxref{Output Section Fill}). |
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specifies what data to write in the gaps (@pxref{Output Section Fill}). |
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@cindex dot inside sections |
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@cindex dot inside sections |
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Alan Modra
25 years ago