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| author | Alan Modra <amodra@bigpond.net.au> | 2006-08-22 07:41:05 +0000 |
|---|---|---|
| committer | Alan Modra <amodra@bigpond.net.au> | 2006-08-22 07:41:05 +0000 |
| commit | a3b0f0c7889c8e1c11b68a0f3a8f2bc3d4a54811 (patch) | |
| tree | 8da54e8211c2ea481248d22d8284c859c35b3686 /ld/ld.texinfo | |
| parent | 464fe482ba15630ffa2d4a30e93b932429514754 (diff) | |
| download | binutils-redhat-a3b0f0c7889c8e1c11b68a0f3a8f2bc3d4a54811.tar.gz | |
* NEWS: Mention LMA default change.
* ld.texinfo (Output Section LMA): Update default description.
(Location Counter): Clarify backward movement.
* ldlang.c (lang_size_sections_1): Leave non-alloc sections with
default lma equal to vma. Warn on backward movement of dot.
Diffstat (limited to 'ld/ld.texinfo')
| -rw-r--r-- | ld/ld.texinfo | 17 |
1 files changed, 12 insertions, 5 deletions
diff --git a/ld/ld.texinfo b/ld/ld.texinfo index 835482d1c2..ea21283483 100644 --- a/ld/ld.texinfo +++ b/ld/ld.texinfo @@ -3764,15 +3764,20 @@ Every section has a virtual address (VMA) and a load address (LMA); see an output section description sets the VMA (@pxref{Output Section Address}). -The linker will normally set the LMA equal to the VMA. You can change -that by using the @code{AT} keyword. The expression @var{lma} that -follows the @code{AT} keyword specifies the load address of the -section. +The expression @var{lma} that follows the @code{AT} keyword specifies +the load address of the section. Alternatively, with @samp{AT>@var{lma_region}} expression, you may specify a memory region for the section's load address. @xref{MEMORY}. Note that if the section has not had a VMA assigned to it then the linker will use the @var{lma_region} as the VMA region as well. + +If neither @code{AT} nor @code{AT>} is specified for an allocatable +section, the linker will set the LMA such that the difference between +VMA and LMA for the section is the same as the preceding output +section in the same region. If there is no preceding output section +or the section is not allocatable, the linker will set the LMA equal +to the VMA. @xref{Output Section Region}. @cindex ROM initialized data @@ -4586,7 +4591,9 @@ anywhere that an ordinary symbol is allowed in an expression. @cindex holes Assigning a value to @code{.} will cause the location counter to be moved. This may be used to create holes in the output section. The -location counter may never be moved backwards. +location counter may not be moved backwards inside an output section, +and may not be moved backwards outside of an output section if so +doing creates areas with overlapping LMAs. @smallexample SECTIONS |