c_sym.htm

mips架构的bootloader,99左右的版本 但源代码现在没人更新了

<title>The sym Command</title>
<h1>sym</h1>

<!--INDEX "sym command" "define symbol" -->


The sym command sets a symbolic name for a variable.<p>

</dl><h2>Format</h2><dl><dd>

The format for this command is:<p>

<pre>
	sym <var>name</var> <var>value</var>
</pre><p>

where:<p>

<table><tr><td>
<var>name</var>	
</td><td>is the name of the variable for which a value is to be set.
</td></tr><tr><td>
<var>value</var>	
</td><td>is the value to which the variable is set.
</td></tr></table><p>

</dl><h2>Functional Description</h2><dl><dd>

The sym command sets a symbolic name to the specified value. Normally 
the load command clears the symbol table. However, there is an option to 
override the clearing of the symbol table (see the load command for 
details). <p>

Symbols can be displayed using the ls command.<p>

Examples illustrating the use of this command follow.<p>

<pre>
PMON> sym start 9fc00240

PMON> sym flush_cache 9fc016f0

PMON> l start 4
start+0x240 3c09a07f	lui	t1,0xa07f
start+0x244 3c08003c	lui	t0,0x3c
start+0x248 3529ff20	ori	t1,t1,0xff20

PMON> l 9fc0027c 5	
start+0x27c 03a1e825	or	sp,sp,at 
start+0x280 0ff005bc	jal	flush_cache
start+0x284 24040000	addiu	a0,zero,0x0
start+0x288 0ff005bc	jal	flush_cache
start+0x28c 24040001	addiu	a0,zero,0x1
</pre><p>

</dl><h2>See Also</h2><dl><dd>
<a href="c_ls.htm">ls</a>, 
<a href="c_load.htm">load</a>, 
<a href="c_l.htm">l</a>,
and <a href="c_sh.htm">sh</a> commands.

</dl><p><hr>
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