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android_kernel_xiaomi_sm8350/drivers/scsi/aic7xxx/aicasm/aicasm_scan.l
Hannes Reinecke 3dbd10f3d8 [SCSI] aic7xxx: teach aicasm to not emit unused debug code/data 
Add a 'count' variable to each symbol which gets increased every time
the symbol is referenced.  And then modify the register definition to
include counts for symbols which are referenced from the source code
only and not from the sequencer code.

This will give us an automatic usage count for the symbols with only
minimal hand-crafting.

Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2008-04-27 12:20:00 -05:00

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%{
/*
* Lexical Analyzer for the Aic7xxx SCSI Host adapter sequencer assembler.
*
* Copyright (c) 1997, 1998, 2000 Justin T. Gibbs.
* Copyright (c) 2001, 2002 Adaptec Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer,
* without modification.
* 2. Redistributions in binary form must reproduce at minimum a disclaimer
* substantially similar to the "NO WARRANTY" disclaimer below
* ("Disclaimer") and any redistribution must be conditioned upon
* including a substantially similar Disclaimer requirement for further
* binary redistribution.
* 3. Neither the names of the above-listed copyright holders nor the names
* of any contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* NO WARRANTY
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGES.
*
* $Id: //depot/aic7xxx/aic7xxx/aicasm/aicasm_scan.l#20 $
*
* $FreeBSD$
*/
#include <sys/types.h>
#include <inttypes.h>
#include <limits.h>
#include <regex.h>
#include <stdio.h>
#include <string.h>
#include <sysexits.h>
#ifdef __linux__
#include "../queue.h"
#else
#include <sys/queue.h>
#endif
#include "aicasm.h"
#include "aicasm_symbol.h"
#include "aicasm_gram.h"
/* This is used for macro body capture too, so err on the large size. */
#define MAX_STR_CONST 4096
static char string_buf[MAX_STR_CONST];
static char *string_buf_ptr;
static int parren_count;
static int quote_count;
static char buf[255];
%}
PATH ([/]*[-A-Za-z0-9_.])+
WORD [A-Za-z_][-A-Za-z_0-9]*
SPACE [ \t]+
MCARG [^(), \t]+
MBODY ((\\[^\n])*[^\n\\]*)+
%x COMMENT
%x CEXPR
%x INCLUDE
%x STRING
%x MACRODEF
%x MACROARGLIST
%x MACROCALLARGS
%x MACROBODY
%%
\n { ++yylineno; }
\r ;
"/*" { BEGIN COMMENT; /* Enter comment eating state */ }
<COMMENT>"/*" { fprintf(stderr, "Warning! Comment within comment."); }
<COMMENT>\n { ++yylineno; }
<COMMENT>[^*/\n]* ;
<COMMENT>"*"+[^*/\n]* ;
<COMMENT>"/"+[^*/\n]* ;
<COMMENT>"*"+"/" { BEGIN INITIAL; }
if[ \t]*\( {
string_buf_ptr = string_buf;
parren_count = 1;
BEGIN CEXPR;
return T_IF;
}
<CEXPR>\( { *string_buf_ptr++ = '('; parren_count++; }
<CEXPR>\) {
parren_count--;
if (parren_count == 0) {
/* All done */
BEGIN INITIAL;
*string_buf_ptr = '\0';
yylval.sym = symtable_get(string_buf);
return T_CEXPR;
} else {
*string_buf_ptr++ = ')';
}
}
<CEXPR>\n { ++yylineno; }
<CEXPR>\r ;
<CEXPR>[^()\n]+ {
char *yptr;
yptr = yytext;
while (*yptr != '\0') {
/* Remove duplicate spaces */
if (*yptr == '\t')
*yptr = ' ';
if (*yptr == ' '
&& string_buf_ptr != string_buf
&& string_buf_ptr[-1] == ' ')
yptr++;
else
*string_buf_ptr++ = *yptr++;
}
}
else { return T_ELSE; }
VERSION { return T_VERSION; }
PREFIX { return T_PREFIX; }
PATCH_ARG_LIST { return T_PATCH_ARG_LIST; }
\" {
string_buf_ptr = string_buf;
BEGIN STRING;
}
<STRING>[^"]+ {
char *yptr;
yptr = yytext;
while (*yptr)
*string_buf_ptr++ = *yptr++;
}
<STRING>\" {
/* All done */
BEGIN INITIAL;
*string_buf_ptr = '\0';
yylval.str = string_buf;
return T_STRING;
}
{SPACE} ;
/* Register/SCB/SRAM definition keywords */
export { return T_EXPORT; }
register { return T_REGISTER; }
const { yylval.value = FALSE; return T_CONST; }
download { return T_DOWNLOAD; }
address { return T_ADDRESS; }
count { return T_COUNT; }
access_mode { return T_ACCESS_MODE; }
modes { return T_MODES; }
RW|RO|WO {
if (strcmp(yytext, "RW") == 0)
yylval.value = RW;
else if (strcmp(yytext, "RO") == 0)
yylval.value = RO;
else
yylval.value = WO;
return T_MODE;
}
field { return T_FIELD; }
enum { return T_ENUM; }
mask { return T_MASK; }
alias { return T_ALIAS; }
size { return T_SIZE; }
scb { return T_SCB; }
scratch_ram { return T_SRAM; }
accumulator { return T_ACCUM; }
mode_pointer { return T_MODE_PTR; }
allones { return T_ALLONES; }
allzeros { return T_ALLZEROS; }
none { return T_NONE; }
sindex { return T_SINDEX; }
A { return T_A; }
/* Instruction Formatting */
PAD_PAGE { return T_PAD_PAGE; }
BEGIN_CRITICAL { return T_BEGIN_CS; }
END_CRITICAL { return T_END_CS; }
SET_SRC_MODE { return T_SET_SRC_MODE; }
SET_DST_MODE { return T_SET_DST_MODE; }
/* Opcodes */
shl { return T_SHL; }
shr { return T_SHR; }
ror { return T_ROR; }
rol { return T_ROL; }
mvi { return T_MVI; }
mov { return T_MOV; }
clr { return T_CLR; }
jmp { return T_JMP; }
jc { return T_JC; }
jnc { return T_JNC; }
je { return T_JE; }
jne { return T_JNE; }
jz { return T_JZ; }
jnz { return T_JNZ; }
call { return T_CALL; }
add { return T_ADD; }
adc { return T_ADC; }
bmov { return T_BMOV; }
inc { return T_INC; }
dec { return T_DEC; }
stc { return T_STC; }
clc { return T_CLC; }
cmp { return T_CMP; }
not { return T_NOT; }
xor { return T_XOR; }
test { return T_TEST;}
and { return T_AND; }
or { return T_OR; }
ret { return T_RET; }
nop { return T_NOP; }
/* ARP2 16bit extensions */
/* or16 { return T_OR16; } */
/* and16 { return T_AND16; }*/
/* xor16 { return T_XOR16; }*/
/* add16 { return T_ADD16; }*/
/* adc16 { return T_ADC16; }*/
/* mvi16 { return T_MVI16; }*/
/* test16 { return T_TEST16; }*/
/* cmp16 { return T_CMP16; }*/
/* cmpxchg { return T_CMPXCHG; }*/
/* Allowed Symbols */
\<\< { return T_EXPR_LSHIFT; }
\>\> { return T_EXPR_RSHIFT; }
[-+,:()~|&."{};<>[\]/*!=] { return yytext[0]; }
/* Number processing */
0[0-7]* {
yylval.value = strtol(yytext, NULL, 8);
return T_NUMBER;
}
0[xX][0-9a-fA-F]+ {
yylval.value = strtoul(yytext + 2, NULL, 16);
return T_NUMBER;
}
[1-9][0-9]* {
yylval.value = strtol(yytext, NULL, 10);
return T_NUMBER;
}
/* Include Files */
#include{SPACE} {
BEGIN INCLUDE;
quote_count = 0;
return T_INCLUDE;
}
<INCLUDE>[<] { return yytext[0]; }
<INCLUDE>[>] { BEGIN INITIAL; return yytext[0]; }
<INCLUDE>[\"] {
if (quote_count != 0)
BEGIN INITIAL;
quote_count++;
return yytext[0];
}
<INCLUDE>{PATH} {
char *yptr;
yptr = yytext;
string_buf_ptr = string_buf;
while (*yptr)
*string_buf_ptr++ = *yptr++;
yylval.str = string_buf;
*string_buf_ptr = '\0';
return T_PATH;
}
<INCLUDE>. { stop("Invalid include line", EX_DATAERR); }
#define{SPACE} {
BEGIN MACRODEF;
return T_DEFINE;
}
<MACRODEF>{WORD}{SPACE} {
char *yptr;
/* Strip space and return as a normal symbol */
yptr = yytext;
while (*yptr != ' ' && *yptr != '\t')
yptr++;
*yptr = '\0';
yylval.sym = symtable_get(yytext);
string_buf_ptr = string_buf;
BEGIN MACROBODY;
return T_SYMBOL;
}
<MACRODEF>{WORD}\( {
/*
* We store the symbol with its opening
* parren so we can differentiate macros
* that take args from macros with the
* same name that do not take args as
* is allowed in C.
*/
BEGIN MACROARGLIST;
yylval.sym = symtable_get(yytext);
unput('(');
return T_SYMBOL;
}
<MACROARGLIST>{WORD} {
yylval.str = yytext;
return T_ARG;
}
<MACROARGLIST>{SPACE} ;
<MACROARGLIST>[(,] {
return yytext[0];
}
<MACROARGLIST>[)] {
string_buf_ptr = string_buf;
BEGIN MACROBODY;
return ')';
}
<MACROARGLIST>. {
snprintf(buf, sizeof(buf), "Invalid character "
"'%c' in macro argument list",
yytext[0]);
stop(buf, EX_DATAERR);
}
<MACROCALLARGS>{SPACE} ;
<MACROCALLARGS>\( {
parren_count++;
if (parren_count == 1)
return ('(');
*string_buf_ptr++ = '(';
}
<MACROCALLARGS>\) {
parren_count--;
if (parren_count == 0) {
BEGIN INITIAL;
return (')');
}
*string_buf_ptr++ = ')';
}
<MACROCALLARGS>{MCARG} {
char *yptr;
yptr = yytext;
while (*yptr)
*string_buf_ptr++ = *yptr++;
}
<MACROCALLARGS>\, {
if (string_buf_ptr != string_buf) {
/*
* Return an argument and
* rescan this comma so we
* can return it as well.
*/
*string_buf_ptr = '\0';
yylval.str = string_buf;
string_buf_ptr = string_buf;
unput(',');
return T_ARG;
}
return ',';
}
<MACROBODY>\\\n {
/* Eat escaped newlines. */
++yylineno;
}
<MACROBODY>\r ;
<MACROBODY>\n {
/* Macros end on the first unescaped newline. */
BEGIN INITIAL;
*string_buf_ptr = '\0';
yylval.str = string_buf;
++yylineno;
return T_MACROBODY;
}
<MACROBODY>{MBODY} {
char *yptr;
char c;
yptr = yytext;
while (c = *yptr++) {
/*
* Strip carriage returns.
*/
if (c == '\r')
continue;
*string_buf_ptr++ = c;
}
}
{WORD}\( {
char *yptr;
char *ycopy;
/* May be a symbol or a macro invocation. */
yylval.sym = symtable_get(yytext);
if (yylval.sym->type == MACRO) {
YY_BUFFER_STATE old_state;
YY_BUFFER_STATE temp_state;
ycopy = strdup(yytext);
yptr = ycopy + yyleng;
while (yptr > ycopy)
unput(*--yptr);
old_state = YY_CURRENT_BUFFER;
temp_state =
yy_create_buffer(stdin,
YY_BUF_SIZE);
yy_switch_to_buffer(temp_state);
mm_switch_to_buffer(old_state);
mmparse();
mm_switch_to_buffer(temp_state);
yy_switch_to_buffer(old_state);
mm_delete_buffer(temp_state);
expand_macro(yylval.sym);
} else {
if (yylval.sym->type == UNINITIALIZED) {
/* Try without the '(' */
symbol_delete(yylval.sym);
yytext[yyleng-1] = '\0';
yylval.sym =
symtable_get(yytext);
}
unput('(');
return T_SYMBOL;
}
}
{WORD} {
yylval.sym = symtable_get(yytext);
if (yylval.sym->type == MACRO) {
expand_macro(yylval.sym);
} else {
return T_SYMBOL;
}
}
. {
snprintf(buf, sizeof(buf), "Invalid character "
"'%c'", yytext[0]);
stop(buf, EX_DATAERR);
}
%%
typedef struct include {
YY_BUFFER_STATE buffer;
int lineno;
char *filename;
SLIST_ENTRY(include) links;
}include_t;
SLIST_HEAD(, include) include_stack;
void
include_file(char *file_name, include_type type)
{
FILE *newfile;
include_t *include;
newfile = NULL;
/* Try the current directory first */
if (includes_search_curdir != 0 || type == SOURCE_FILE)
newfile = fopen(file_name, "r");
if (newfile == NULL && type != SOURCE_FILE) {
path_entry_t include_dir;
for (include_dir = search_path.slh_first;
include_dir != NULL;
include_dir = include_dir->links.sle_next) {
char fullname[PATH_MAX];
if ((include_dir->quoted_includes_only == TRUE)
&& (type != QUOTED_INCLUDE))
continue;
snprintf(fullname, sizeof(fullname),
"%s/%s", include_dir->directory, file_name);
if ((newfile = fopen(fullname, "r")) != NULL)
break;
}
}
if (newfile == NULL) {
perror(file_name);
stop("Unable to open input file", EX_SOFTWARE);
/* NOTREACHED */
}
if (type != SOURCE_FILE) {
include = (include_t *)malloc(sizeof(include_t));
if (include == NULL) {
stop("Unable to allocate include stack entry",
EX_SOFTWARE);
/* NOTREACHED */
}
include->buffer = YY_CURRENT_BUFFER;
include->lineno = yylineno;
include->filename = yyfilename;
SLIST_INSERT_HEAD(&include_stack, include, links);
}
yy_switch_to_buffer(yy_create_buffer(newfile, YY_BUF_SIZE));
yylineno = 1;
yyfilename = strdup(file_name);
}
static void next_substitution(struct symbol *mac_symbol, const char *body_pos,
const char **next_match,
struct macro_arg **match_marg, regmatch_t *match);
void
expand_macro(struct symbol *macro_symbol)
{
struct macro_arg *marg;
struct macro_arg *match_marg;
const char *body_head;
const char *body_pos;
const char *next_match;
/*
* Due to the nature of unput, we must work
* backwards through the macro body performing
* any expansions.
*/
body_head = macro_symbol->info.macroinfo->body;
body_pos = body_head + strlen(body_head);
while (body_pos > body_head) {
regmatch_t match;
next_match = body_head;
match_marg = NULL;
next_substitution(macro_symbol, body_pos, &next_match,
&match_marg, &match);
/* Put back everything up until the replacement. */
while (body_pos > next_match)
unput(*--body_pos);
/* Perform the replacement. */
if (match_marg != NULL) {
const char *strp;
next_match = match_marg->replacement_text;
strp = next_match + strlen(next_match);
while (strp > next_match)
unput(*--strp);
/* Skip past the unexpanded macro arg. */
body_pos -= match.rm_eo - match.rm_so;
}
}
/* Cleanup replacement text. */
STAILQ_FOREACH(marg, &macro_symbol->info.macroinfo->args, links) {
free(marg->replacement_text);
}
}
/*
* Find the next substitution in the macro working backwards from
* body_pos until the beginning of the macro buffer. next_match
* should be initialized to the beginning of the macro buffer prior
* to calling this routine.
*/
static void
next_substitution(struct symbol *mac_symbol, const char *body_pos,
const char **next_match, struct macro_arg **match_marg,
regmatch_t *match)
{
regmatch_t matches[2];
struct macro_arg *marg;
const char *search_pos;
int retval;
do {
search_pos = *next_match;
STAILQ_FOREACH(marg, &mac_symbol->info.macroinfo->args, links) {
retval = regexec(&marg->arg_regex, search_pos, 2,
matches, 0);
if (retval == 0
&& (matches[1].rm_eo + search_pos) <= body_pos
&& (matches[1].rm_eo + search_pos) > *next_match) {
*match = matches[1];
*next_match = match->rm_eo + search_pos;
*match_marg = marg;
}
}
} while (search_pos != *next_match);
}
int
yywrap()
{
include_t *include;
yy_delete_buffer(YY_CURRENT_BUFFER);
(void)fclose(yyin);
if (yyfilename != NULL)
free(yyfilename);
yyfilename = NULL;
include = include_stack.slh_first;
if (include != NULL) {
yy_switch_to_buffer(include->buffer);
yylineno = include->lineno;
yyfilename = include->filename;
SLIST_REMOVE_HEAD(&include_stack, links);
free(include);
return (0);
}
return (1);
}
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