c_ls

MIPS处理器的bootloader,龙芯就是用的修改过的PMON2

The ls Command
ls

The ls command lists the current symbols in the symbol table. 

Format

The format for the ls command is:

	ls [-ln] [sym|[-[v|a] adr]

where:

-l	provides a long listing, showing the address value for each 
	symbol.

-n	lists the symbols in ascending order of address.

sym	is a pattern filter for the symbols to be shown. Both character 
	wildcards ("?") and word wildcards ("*") are permitted.

-v	is the verbose option, showing the value in hexadecimal, 
	decimal, and octal.

-a	shows the address in symbolic form.

adr	is the address for which a symbol or offset from a symbol is 
	sought.

Invoking the ls command without any options or parameters lists the 
symbols in alphabetical order without displaying the actual address 
for each symbol.

Functional Description

The ls command lists the symbols in the symbol table.

The -l option produces a long listing, which includes the address value of 
each symbol. The -n option causes the symbols to be listed in ascending 
order of address. The -a adr option lists the symbol at the next lowest 
address. The -v adr option prints the result in hex, decimal, and octal. The 
-v option is useful for computing the value of an expression that may 
include registers, symbols, and absolute values. 

Examples illustrating the use of the ls command follow.

PMON ls	

flush_cache   start

List symbols in alphabetic order.

PMON ls -l	

9fc016f0 flush_cache 

9fc00240 start

List symbols in alphabetic order with addresses. 

PMON ls -ln	

9fc00240 start

9fc016f0 flush_cache

List symbols and addresses in ascending order of address.

PMON ls s*	

start

List symbols starting with the letter "s."

PMON ls -a 9fc00260	

9fc00240 start+0x20

List symbol at the next lowest address.

PMON ls -a @epc	

a0020020 = start+0x20

List symbol at the next lowest address from EPC.

PMON ls -v @t0+0t10*4	

0x800222e8 = 0t-2147343640 = 0o20000421350

Display the value of the expression "@t0+0t10*4":