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authorsandra <sandra@138bc75d-0d04-0410-961f-82ee72b054a4>2016-01-04 02:44:45 +0000
committersandra <sandra@138bc75d-0d04-0410-961f-82ee72b054a4>2016-01-04 02:44:45 +0000
commitfde14dff03c2ff573583e48d99b2ead5a17bc1e4 (patch)
treef69e27798b8b58705b17855f295edc8462a4c929
parent586176d8849468ed6f3226b25e452cce49329fa2 (diff)
downloadgcc-fde14dff03c2ff573583e48d99b2ead5a17bc1e4.tar.gz
2016-01-03 Sandra Loosemore <sandra@codesourcery.com>
gcc/ * doc/extend.texi (Common Function Attributes): Move docs for MSP430-specific attributes to.... (MSP430 Function Attributes): ...here. Delete the redundant entries and copy-edit the remaining text. (MSP430 Variable Attributes): Use uniform format for index entries and add a cross-reference to the corresponding function attribute docs. git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@232047 138bc75d-0d04-0410-961f-82ee72b054a4
-rw-r--r--gcc/ChangeLog10
-rw-r--r--gcc/doc/extend.texi95
2 files changed, 49 insertions, 56 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 360c28237dd..099682761b5 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,13 @@
+2016-01-03 Sandra Loosemore <sandra@codesourcery.com>
+
+ * doc/extend.texi (Common Function Attributes): Move docs for
+ MSP430-specific attributes to....
+ (MSP430 Function Attributes): ...here. Delete the redundant
+ entries and copy-edit the remaining text.
+ (MSP430 Variable Attributes): Use uniform format for index
+ entries and add a cross-reference to the corresponding function
+ attribute docs.
+
2016-01-03 Vladimír Čunát <vcunat@gmail.com>
* doc/invoke.texi (RS/6000 and PowerPC Options): Fix
diff --git a/gcc/doc/extend.texi b/gcc/doc/extend.texi
index dcee0a7a444..2e55328cdf6 100644
--- a/gcc/doc/extend.texi
+++ b/gcc/doc/extend.texi
@@ -3394,55 +3394,6 @@ performing a reloadable link on them.
At present, a declaration to which @code{weakref} is attached can
only be @code{static}.
-@item lower
-@itemx upper
-@itemx either
-@cindex lower memory region on the MSP430
-@cindex upper memory region on the MSP430
-@cindex either memory region on the MSP430
-On the MSP430 target these attributes can be used to specify whether
-the function or variable should be placed into low memory, high
-memory, or the placement should be left to the linker to decide. The
-attributes are only significant if compiling for the MSP430X
-architecture.
-
-The attributes work in conjunction with a linker script that has been
-augmented to specify where to place sections with a @code{.lower} and
-a @code{.upper} prefix. So for example as well as placing the
-@code{.data} section the script would also specify the placement of a
-@code{.lower.data} and a @code{.upper.data} section. The intention
-being that @code{lower} sections are placed into a small but easier to
-access memory region and the upper sections are placed into a larger, but
-slower to access region.
-
-The @code{either} attribute is special. It tells the linker to place
-the object into the corresponding @code{lower} section if there is
-room for it. If there is insufficient room then the object is placed
-into the corresponding @code{upper} section instead. Note - the
-placement algorithm is not very sophisticated. It will not attempt to
-find an optimal packing of the @code{lower} sections. It just makes
-one pass over the objects and does the best that it can. Using the
-@option{-ffunction-sections} and @option{-fdata-sections} command line
-options can help the packing however, since they produce smaller,
-easier to pack regions.
-
-@item reentrant
-On the MSP430 a function can be given the @code{reentant} attribute.
-This makes the function disable interrupts upon entry and enable
-interrupts upon exit. Reentrant functions cannot be @code{naked}.
-
-@item critical
-On the MSP430 a function can be given the @code{critical} attribute.
-This makes the function disable interrupts upon entry and restore the
-previous interrupt enabled/disabled state upon exit. A function
-cannot have both the @code{reentrant} and @code{critical} attributes.
-Critical functions cannot be @code{naked}.
-
-@item wakeup
-On the MSP430 a function can be given the @code{wakeup} attribute.
-Such a function must also have the @code{interrupt} attribute. When a
-function with the @code{wakeup} attribute exists the processor will be
-woken up from any low-power state in which it may be residing.
@end table
@@ -4531,6 +4482,38 @@ This attribute only applies to interrupt functions. It is silently
ignored if applied to a non-interrupt function. A wakeup interrupt
function will rouse the processor from any low-power state that it
might be in when the function exits.
+
+@item lower
+@itemx upper
+@itemx either
+@cindex @code{lower} function attribute, MSP430
+@cindex @code{upper} function attribute, MSP430
+@cindex @code{either} function attribute, MSP430
+On the MSP430 target these attributes can be used to specify whether
+the function or variable should be placed into low memory, high
+memory, or the placement should be left to the linker to decide. The
+attributes are only significant if compiling for the MSP430X
+architecture.
+
+The attributes work in conjunction with a linker script that has been
+augmented to specify where to place sections with a @code{.lower} and
+a @code{.upper} prefix. So, for example, as well as placing the
+@code{.data} section, the script also specifies the placement of a
+@code{.lower.data} and a @code{.upper.data} section. The intention
+is that @code{lower} sections are placed into a small but easier to
+access memory region and the upper sections are placed into a larger, but
+slower to access, region.
+
+The @code{either} attribute is special. It tells the linker to place
+the object into the corresponding @code{lower} section if there is
+room for it. If there is insufficient room then the object is placed
+into the corresponding @code{upper} section instead. Note that the
+placement algorithm is not very sophisticated. It does not attempt to
+find an optimal packing of the @code{lower} sections. It just makes
+one pass over the objects and does the best that it can. Using the
+@option{-ffunction-sections} and @option{-fdata-sections} command-line
+options can help the packing, however, since they produce smaller,
+easier to pack regions.
@end table
@node NDS32 Function Attributes
@@ -6042,13 +6025,13 @@ The @code{shared} attribute is only available on Microsoft Windows@.
@table @code
@item noinit
-@cindex @code{noinit} MSP430 variable attribute
+@cindex @code{noinit} variable attribute, MSP430
Any data with the @code{noinit} attribute will not be initialised by
the C runtime startup code, or the program loader. Not initialising
data in this way can reduce program startup times.
@item persistent
-@cindex @code{persistent} MSP430 variable attribute
+@cindex @code{persistent} variable attribute, MSP430
Any variable with the @code{persistent} attribute will not be
initialised by the C runtime startup code. Instead its value will be
set once, when the application is loaded, and then never initialised
@@ -6061,12 +6044,12 @@ placed.
@item lower
@itemx upper
@itemx either
-@cindex @code{lower} memory region on the MSP430
-@cindex @code{upper} memory region on the MSP430
-@cindex @code{either} memory region on the MSP430
+@cindex @code{lower} variable attribute, MSP430
+@cindex @code{upper} variable attribute, MSP430
+@cindex @code{either} variable attribute, MSP430
These attributes are the same as the MSP430 function attributes of the
-same name. These attributes can be applied to both functions and
-variables.
+same name (@pxref{MSP430 Function Attributes}).
+These attributes can be applied to both functions and variables.
@end table
@node PowerPC Variable Attributes