Import stripped Arm GNU Toolchain 13.2.Rel1HEAD umineko

https://developer.arm.com/downloads/-/arm-gnu-toolchain-downloads Change-Id: I7303388733328cd98ab9aa3c30236db67f2e9e9c
author: alk3pInjection <webmaster@raspii.tech> 2024-02-04 16:16:35 +0800
committer: alk3pInjection <webmaster@raspii.tech> 2024-02-04 16:16:35 +0800
commit: abdaadbcae30fe0c9a66c7516798279fdfd97750 (patch)
tree: 00a54a6e25601e43876d03c1a4a12a749d4a914c /share/doc/gcc/SH-Function-Attributes.html
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+<a name="SH-Function-Attributes"></a>
+<div class="header">
+<p>
+Next: <a href="Symbian-OS-Function-Attributes.html#Symbian-OS-Function-Attributes" accesskey="n" rel="next">Symbian OS Function Attributes</a>, Previous: <a href="S_002f390-Function-Attributes.html#S_002f390-Function-Attributes" accesskey="p" rel="previous">S/390 Function Attributes</a>, Up: <a href="Function-Attributes.html#Function-Attributes" accesskey="u" rel="up">Function Attributes</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Indices.html#Indices" title="Index" rel="index">Index</a>]</p>
+</div>
+<hr>
+<a name="SH-Function-Attributes-1"></a>
+<h4 class="subsection">6.33.29 SH Function Attributes</h4>
+
+<p>These function attributes are supported on the SH family of processors:
+</p>
+<dl compact="compact">
+<dd><a name="index-function_005fvector-function-attribute_002c-SH"></a>
+<a name="index-calling-functions-through-the-function-vector-on-SH2A"></a>
+</dd>
+<dt><code>function_vector</code></dt>
+<dd><p>On SH2A targets, this attribute declares a function to be called using the
+TBR relative addressing mode.  The argument to this attribute is the entry
+number of the same function in a vector table containing all the TBR
+relative addressable functions.  For correct operation the TBR must be setup
+accordingly to point to the start of the vector table before any functions with
+this attribute are invoked.  Usually a good place to do the initialization is
+the startup routine.  The TBR relative vector table can have at max 256 function
+entries.  The jumps to these functions are generated using a SH2A specific,
+non delayed branch instruction JSR/N @(disp8,TBR).  You must use GAS and GLD
+from GNU binutils version 2.7 or later for this attribute to work correctly.
+</p>
+<p>In an application, for a function being called once, this attribute
+saves at least 8 bytes of code; and if other successive calls are being
+made to the same function, it saves 2 bytes of code per each of these
+calls.
+</p>
+<a name="index-interrupt_005fhandler-function-attribute_002c-SH"></a>
+</dd>
+<dt><code>interrupt_handler</code></dt>
+<dd><p>Use this attribute to
+indicate that the specified function is an interrupt handler.  The compiler
+generates function entry and exit sequences suitable for use in an
+interrupt handler when this attribute is present.
+</p>
+<a name="index-nosave_005flow_005fregs-function-attribute_002c-SH"></a>
+</dd>
+<dt><code>nosave_low_regs</code></dt>
+<dd><p>Use this attribute on SH targets to indicate that an <code>interrupt_handler</code>
+function should not save and restore registers R0..R7.  This can be used on SH3*
+and SH4* targets that have a second R0..R7 register bank for non-reentrant
+interrupt handlers.
+</p>
+<a name="index-renesas-function-attribute_002c-SH"></a>
+</dd>
+<dt><code>renesas</code></dt>
+<dd><p>On SH targets this attribute specifies that the function or struct follows the
+Renesas ABI.
+</p>
+<a name="index-resbank-function-attribute_002c-SH"></a>
+</dd>
+<dt><code>resbank</code></dt>
+<dd><p>On the SH2A target, this attribute enables the high-speed register
+saving and restoration using a register bank for <code>interrupt_handler</code>
+routines.  Saving to the bank is performed automatically after the CPU
+accepts an interrupt that uses a register bank.
+</p>
+<p>The nineteen 32-bit registers comprising general register R0 to R14,
+control register GBR, and system registers MACH, MACL, and PR and the
+vector table address offset are saved into a register bank.  Register
+banks are stacked in first-in last-out (FILO) sequence.  Restoration
+from the bank is executed by issuing a RESBANK instruction.
+</p>
+<a name="index-sp_005fswitch-function-attribute_002c-SH"></a>
+</dd>
+<dt><code>sp_switch</code></dt>
+<dd><p>Use this attribute on the SH to indicate an <code>interrupt_handler</code>
+function should switch to an alternate stack.  It expects a string
+argument that names a global variable holding the address of the
+alternate stack.
+</p>
+<div class="smallexample">
+<pre class="smallexample">void *alt_stack;
+void f () __attribute__ ((interrupt_handler,
+                          sp_switch (&quot;alt_stack&quot;)));
+</pre></div>
+
+<a name="index-trap_005fexit-function-attribute_002c-SH"></a>
+</dd>
+<dt><code>trap_exit</code></dt>
+<dd><p>Use this attribute on the SH for an <code>interrupt_handler</code> to return using
+<code>trapa</code> instead of <code>rte</code>.  This attribute expects an integer
+argument specifying the trap number to be used.
+</p>
+<a name="index-trapa_005fhandler-function-attribute_002c-SH"></a>
+</dd>
+<dt><code>trapa_handler</code></dt>
+<dd><p>On SH targets this function attribute is similar to <code>interrupt_handler</code>
+but it does not save and restore all registers.
+</p></dd>
+</dl>
+
+<hr>
+<div class="header">
+<p>
+Next: <a href="Symbian-OS-Function-Attributes.html#Symbian-OS-Function-Attributes" accesskey="n" rel="next">Symbian OS Function Attributes</a>, Previous: <a href="S_002f390-Function-Attributes.html#S_002f390-Function-Attributes" accesskey="p" rel="previous">S/390 Function Attributes</a>, Up: <a href="Function-Attributes.html#Function-Attributes" accesskey="u" rel="up">Function Attributes</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Indices.html#Indices" title="Index" rel="index">Index</a>]</p>
+</div>
+
+
+
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+</html>
author	alk3pInjection <webmaster@raspii.tech>	2024-02-04 16:16:35 +0800
committer	alk3pInjection <webmaster@raspii.tech>	2024-02-04 16:16:35 +0800
commit	abdaadbcae30fe0c9a66c7516798279fdfd97750 (patch)
tree	00a54a6e25601e43876d03c1a4a12a749d4a914c /share/doc/gcc/SH-Function-Attributes.html