X-Git-Url: http://drtracing.org/?a=blobdiff_plain;f=gas%2Fapp.c;h=00c31bbf3906fe5ca85a191b9350cedf8a9072d9;hb=de54374205650be71237ce51ef7981d30ddd78dc;hp=b40411537088c538c5e82d3a3f52c8bb2b0efedd;hpb=ebd1c8757cf3f32daffe2615cbb778e495ebe412;p=deliverable%2Fbinutils-gdb.git diff --git a/gas/app.c b/gas/app.c index b404115370..00c31bbf39 100644 --- a/gas/app.c +++ b/gas/app.c @@ -1,19 +1,17 @@ /* This is the Assembler Pre-Processor - Copyright 1987, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, - 1999, 2000, 2001, 2002, 2003, 2006 - Free Software Foundation, Inc. + Copyright (C) 1987-2020 Free Software Foundation, Inc. This file is part of GAS, the GNU Assembler. GAS is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2, or (at your option) + the Free Software Foundation; either version 3, or (at your option) any later version. - GAS is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. + GAS is distributed in the hope that it will be useful, but WITHOUT + ANY WARRANTY; without even the implied warranty of MERCHANTABILITY + or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public + License for more details. You should have received a copy of the GNU General Public License along with GAS; see the file COPYING. If not, write to the Free @@ -21,10 +19,10 @@ 02110-1301, USA. */ /* Modified by Allen Wirfs-Brock, Instantiations Inc 2/90. */ -/* App, the assembler pre-processor. This pre-processor strips out excess - spaces, turns single-quoted characters into a decimal constant, and turns - # into a .line \n.file - pair. This needs better error-handling. */ +/* App, the assembler pre-processor. This pre-processor strips out + excess spaces, turns single-quoted characters into a decimal + constant, and turns the # in # into a + .linefile. This needs better error-handling. */ #include "as.h" @@ -34,6 +32,10 @@ #endif #endif +#ifdef H_TICK_HEX +int enable_h_tick_hex = 0; +#endif + #ifdef TC_M68K /* Whether we are scrubbing in m68k MRI mode. This is different from flag_m68k_mri, because the two flags will be affected by the .mri @@ -53,6 +55,9 @@ static const char mri_pseudo[] = ".mri 0"; static const char symver_pseudo[] = ".symver"; static const char * symver_state; #endif +#ifdef TC_ARM +static char last_char; +#endif static char lex[256]; static const char symbol_chars[] = @@ -78,6 +83,9 @@ static const char symbol_chars[] = #define LEX_IS_DOUBLEBAR_1ST 13 #endif #define LEX_IS_PARALLEL_SEPARATOR 14 +#ifdef H_TICK_HEX +#define LEX_IS_H 15 +#endif #define IS_SYMBOL_COMPONENT(c) (lex[c] == LEX_IS_SYMBOL_COMPONENT) #define IS_WHITESPACE(c) (lex[c] == LEX_IS_WHITESPACE) #define IS_LINE_SEPARATOR(c) (lex[c] == LEX_IS_LINE_SEPARATOR) @@ -112,8 +120,7 @@ do_scrub_begin (int m68k_mri ATTRIBUTE_UNUSED) { lex['"'] = LEX_IS_STRINGQUOTE; -#if ! defined (TC_HPPA) && ! defined (TC_I370) - /* I370 uses single-quotes to delimit integer, float constants. */ +#if ! defined (TC_HPPA) lex['\''] = LEX_IS_ONECHAR_QUOTE; #endif @@ -153,7 +160,10 @@ do_scrub_begin (int m68k_mri ATTRIBUTE_UNUSED) for (p = line_comment_chars; *p; p++) lex[(unsigned char) *p] = LEX_IS_LINE_COMMENT_START; - for (p = line_separator_chars; *p; p++) +#ifndef tc_line_separator_chars +#define tc_line_separator_chars line_separator_chars +#endif + for (p = tc_line_separator_chars; *p; p++) lex[(unsigned char) *p] = LEX_IS_LINE_SEPARATOR; #ifdef tc_parallel_separator_chars @@ -190,16 +200,24 @@ do_scrub_begin (int m68k_mri ATTRIBUTE_UNUSED) /* Must do this is we want VLIW instruction with "->" or "<-". */ lex['-'] = LEX_IS_SYMBOL_COMPONENT; #endif + +#ifdef H_TICK_HEX + if (enable_h_tick_hex) + { + lex['h'] = LEX_IS_H; + lex['H'] = LEX_IS_H; + } +#endif } /* Saved state of the scrubber. */ static int state; static int old_state; -static char *out_string; +static const char *out_string; static char out_buf[20]; static int add_newlines; static char *saved_input; -static int saved_input_len; +static size_t saved_input_len; static char input_buffer[32 * 1024]; static const char *mri_state; static char mri_last_ch; @@ -213,11 +231,11 @@ struct app_save { int state; int old_state; - char * out_string; + const char * out_string; char out_buf[sizeof (out_buf)]; int add_newlines; char * saved_input; - int saved_input_len; + size_t saved_input_len; #ifdef TC_M68K int scrub_m68k_mri; #endif @@ -226,14 +244,17 @@ struct app_save #if defined TC_ARM && defined OBJ_ELF const char * symver_state; #endif +#ifdef TC_ARM + char last_char; +#endif }; char * app_push (void) { - register struct app_save *saved; + struct app_save *saved; - saved = (struct app_save *) xmalloc (sizeof (*saved)); + saved = XNEW (struct app_save); saved->state = state; saved->old_state = old_state; saved->out_string = out_string; @@ -243,7 +264,7 @@ app_push (void) saved->saved_input = NULL; else { - saved->saved_input = xmalloc (saved_input_len); + saved->saved_input = XNEWVEC (char, saved_input_len); memcpy (saved->saved_input, saved_input, saved_input_len); saved->saved_input_len = saved_input_len; } @@ -255,11 +276,15 @@ app_push (void) #if defined TC_ARM && defined OBJ_ELF saved->symver_state = symver_state; #endif +#ifdef TC_ARM + saved->last_char = last_char; +#endif /* do_scrub_begin() is not useful, just wastes time. */ state = 0; saved_input = NULL; + add_newlines = 0; return (char *) saved; } @@ -267,7 +292,7 @@ app_push (void) void app_pop (char *arg) { - register struct app_save *saved = (struct app_save *) arg; + struct app_save *saved = (struct app_save *) arg; /* There is no do_scrub_end (). */ state = saved->state; @@ -279,7 +304,7 @@ app_pop (char *arg) saved_input = NULL; else { - assert (saved->saved_input_len <= (int) (sizeof input_buffer)); + gas_assert (saved->saved_input_len <= sizeof (input_buffer)); memcpy (input_buffer, saved->saved_input, saved->saved_input_len); saved_input = input_buffer; saved_input_len = saved->saved_input_len; @@ -293,6 +318,9 @@ app_pop (char *arg) #if defined TC_ARM && defined OBJ_ELF symver_state = saved->symver_state; #endif +#ifdef TC_ARM + last_char = saved->last_char; +#endif free (arg); } @@ -335,15 +363,15 @@ process_escape (int ch) machine, and saves its state so that it may return at any point. This is the way the old code used to work. */ -int -do_scrub_chars (int (*get) (char *, int), char *tostart, int tolen) +size_t +do_scrub_chars (size_t (*get) (char *, size_t), char *tostart, size_t tolen) { char *to = tostart; char *toend = tostart + tolen; char *from; char *fromend; - int fromlen; - register int ch, ch2 = 0; + size_t fromlen; + int ch, ch2 = 0; /* Character that started the string we're working on. */ static char quotechar; @@ -351,11 +379,11 @@ do_scrub_chars (int (*get) (char *, int), char *tostart, int tolen) 1: After first whitespace on line (flush more white) 2: After first non-white (opcode) on line (keep 1white) 3: after second white on line (into operands) (flush white) - 4: after putting out a .line, put out digits + 4: after putting out a .linefile, put out digits 5: parsing a string, then go to old-state 6: putting out \ escape in a "d string. - 7: After putting out a .appfile, put out string. - 8: After putting out a .appfile string, flush until newline. + 7: no longer used + 8: no longer used 9: After seeing symbol char in state 3 (keep 1white after symchar) 10: After seeing whitespace in state 9 (keep white before symchar) 11: After seeing a symbol character in state 0 (eg a label definition) @@ -369,11 +397,11 @@ do_scrub_chars (int (*get) (char *, int), char *tostart, int tolen) 13: After seeing a vertical bar, looking for a second vertical bar as a parallel expression separator. #endif -#ifdef TC_IA64 - 14: After seeing a `(' at state 0, looking for a `)' as - predicate. - 15: After seeing a `(' at state 1, looking for a `)' as - predicate. +#ifdef TC_PREDICATE_START_CHAR + 14: After seeing a predicate start character at state 0, looking + for a predicate end character as predicate. + 15: After seeing a predicate start character at state 1, looking + for a predicate end character as predicate. #endif #ifdef TC_Z80 16: After seeing an 'a' or an 'A' at the start of a symbol @@ -510,14 +538,10 @@ do_scrub_chars (int (*get) (char *, int), char *tostart, int tolen) ch = GET (); if (ch == '"') { - UNGET (ch); - if (scrub_m68k_mri) - out_string = "\n\tappfile "; - else - out_string = "\n\t.appfile "; - old_state = 7; - state = -1; - PUT (*out_string++); + quotechar = ch; + state = 5; + old_state = 3; + PUT (ch); } else { @@ -536,7 +560,7 @@ do_scrub_chars (int (*get) (char *, int), char *tostart, int tolen) GET and PUT macros. */ { char *s; - int len; + ptrdiff_t len; for (s = from; s < fromend; s++) { @@ -554,14 +578,22 @@ do_scrub_chars (int (*get) (char *, int), char *tostart, int tolen) memcpy (to, from, len); to += len; from += len; + if (to >= toend) + goto tofull; } } ch = GET (); if (ch == EOF) { + /* This buffer is here specifically so + that the UNGET below will work. */ + static char one_char_buf[1]; + as_warn (_("end of file in string; '%c' inserted"), quotechar); state = old_state; + from = fromend = one_char_buf + 1; + fromlen = 1; UNGET ('\n'); PUT (quotechar); } @@ -570,13 +602,11 @@ do_scrub_chars (int (*get) (char *, int), char *tostart, int tolen) state = old_state; PUT (ch); } -#ifndef NO_STRING_ESCAPES - else if (ch == '\\') + else if (TC_STRING_ESCAPES && ch == '\\') { state = 6; PUT (ch); } -#endif else if (scrub_m68k_mri && ch == '\n') { /* Just quietly terminate the string. This permits lines like @@ -638,24 +668,6 @@ do_scrub_chars (int (*get) (char *, int), char *tostart, int tolen) PUT (ch); continue; - case 7: - ch = GET (); - quotechar = ch; - state = 5; - old_state = 8; - PUT (ch); - continue; - - case 8: - do - ch = GET (); - while (ch != '\n' && ch != EOF); - if (ch == EOF) - goto fromeof; - state = 0; - PUT (ch); - continue; - #ifdef DOUBLEBAR_PARALLEL case 13: ch = GET (); @@ -666,13 +678,23 @@ do_scrub_chars (int (*get) (char *, int), char *tostart, int tolen) line from just after the first white space. */ state = 1; PUT ('|'); +#ifdef TC_TIC6X + /* "||^" is used for SPMASKed instructions. */ + ch = GET (); + if (ch == EOF) + goto fromeof; + else if (ch == '^') + PUT ('^'); + else + UNGET (ch); +#endif continue; #endif #ifdef TC_Z80 case 16: /* We have seen an 'a' at the start of a symbol, look for an 'f'. */ ch = GET (); - if (ch == 'f' || ch == 'F') + if (ch == 'f' || ch == 'F') { state = 17; PUT (ch); @@ -682,6 +704,7 @@ do_scrub_chars (int (*get) (char *, int), char *tostart, int tolen) state = 9; break; } + /* Fall through. */ case 17: /* We have seen "af" at the start of a symbol, a ' here is a part of that symbol. */ @@ -690,7 +713,7 @@ do_scrub_chars (int (*get) (char *, int), char *tostart, int tolen) if (ch == '\'') /* Change to avoid warning about unclosed string. */ PUT ('`'); - else + else if (ch != EOF) UNGET (ch); break; #endif @@ -701,8 +724,8 @@ do_scrub_chars (int (*get) (char *, int), char *tostart, int tolen) /* flushchar: */ ch = GET (); -#ifdef TC_IA64 - if (ch == '(' && (state == 0 || state == 1)) +#ifdef TC_PREDICATE_START_CHAR + if (ch == TC_PREDICATE_START_CHAR && (state == 0 || state == 1)) { state += 14; PUT (ch); @@ -710,7 +733,7 @@ do_scrub_chars (int (*get) (char *, int), char *tostart, int tolen) } else if (state == 14 || state == 15) { - if (ch == ')') + if (ch == TC_PREDICATE_END_CHAR) { state -= 14; PUT (ch); @@ -846,7 +869,8 @@ do_scrub_chars (int (*get) (char *, int), char *tostart, int tolen) /* Only keep this white if there's no white *after* the colon. */ ch2 = GET (); - UNGET (ch2); + if (ch2 != EOF) + UNGET (ch2); if (!IS_WHITESPACE (ch2)) { state = 9; @@ -903,7 +927,11 @@ do_scrub_chars (int (*get) (char *, int), char *tostart, int tolen) PUT (' '); break; case 3: +#ifndef TC_KEEP_OPERAND_SPACES + /* For TI C6X, we keep these spaces as they may separate + functional unit specifiers from operands. */ if (scrub_m68k_mri) +#endif { /* In MRI mode, we keep these spaces. */ UNGET (ch); @@ -913,7 +941,9 @@ do_scrub_chars (int (*get) (char *, int), char *tostart, int tolen) goto recycle; /* Sp in operands */ case 9: case 10: +#ifndef TC_KEEP_OPERAND_SPACES if (scrub_m68k_mri) +#endif { /* In MRI mode, we keep these spaces. */ state = 3; @@ -1020,8 +1050,17 @@ do_scrub_chars (int (*get) (char *, int), char *tostart, int tolen) PUT (ch); break; -#ifndef IEEE_STYLE case LEX_IS_ONECHAR_QUOTE: +#ifdef H_TICK_HEX + if (state == 9 && enable_h_tick_hex) + { + char c; + + c = GET (); + as_warn ("'%c found after symbol", c); + UNGET (c); + } +#endif if (state == 10) { /* Preserve the whitespace in foo 'b'. */ @@ -1072,7 +1111,6 @@ do_scrub_chars (int (*get) (char *, int), char *tostart, int tolen) out_string = out_buf; PUT (*out_string++); break; -#endif case LEX_IS_COLON: #ifdef KEEP_WHITE_AROUND_COLON @@ -1110,7 +1148,8 @@ do_scrub_chars (int (*get) (char *, int), char *tostart, int tolen) ch2 = GET (); if (ch2 != '-') { - UNGET (ch2); + if (ch2 != EOF) + UNGET (ch2); goto de_fault; } /* Read and skip to end of line. */ @@ -1130,7 +1169,8 @@ do_scrub_chars (int (*get) (char *, int), char *tostart, int tolen) #ifdef DOUBLEBAR_PARALLEL case LEX_IS_DOUBLEBAR_1ST: ch2 = GET (); - UNGET (ch2); + if (ch2 != EOF) + UNGET (ch2); if (ch2 != '|') goto de_fault; @@ -1155,7 +1195,7 @@ do_scrub_chars (int (*get) (char *, int), char *tostart, int tolen) state = -2; break; } - else + else if (ch2 != EOF) { UNGET (ch2); } @@ -1186,9 +1226,16 @@ do_scrub_chars (int (*get) (char *, int), char *tostart, int tolen) while (ch != EOF && !IS_NEWLINE (ch)) ch = GET (); if (ch == EOF) - as_warn (_("end of file in comment; newline inserted")); + { + as_warn (_("end of file in comment; newline inserted")); + PUT ('\n'); + } + else /* IS_NEWLINE (ch) */ + { + /* To process non-zero add_newlines. */ + UNGET (ch); + } state = 0; - PUT ('\n'); break; } /* Looks like `# 123 "filename"' from cpp. */ @@ -1196,9 +1243,9 @@ do_scrub_chars (int (*get) (char *, int), char *tostart, int tolen) old_state = 4; state = -1; if (scrub_m68k_mri) - out_string = "\tappline "; + out_string = "\tlinefile "; else - out_string = "\t.appline "; + out_string = "\t.linefile "; PUT (*out_string++); break; } @@ -1241,9 +1288,18 @@ do_scrub_chars (int (*get) (char *, int), char *tostart, int tolen) if ((symver_state != NULL) && (*symver_state == 0)) goto de_fault; #endif + +#ifdef TC_ARM + /* For the ARM, care is needed not to damage occurrences of \@ + by stripping the @ onwards. Yuck. */ + if ((to > tostart ? to[-1] : last_char) == '\\') + /* Do not treat the @ as a start-of-comment. */ + goto de_fault; +#endif + #ifdef WARN_COMMENTS if (!found_comment) - as_where (&found_comment_file, &found_comment); + found_comment_file = as_where (&found_comment); #endif do { @@ -1256,6 +1312,26 @@ do_scrub_chars (int (*get) (char *, int), char *tostart, int tolen) PUT ('\n'); break; +#ifdef H_TICK_HEX + case LEX_IS_H: + /* Look for strings like H'[0-9A-Fa-f] and if found, replace + the H' with 0x to make them gas-style hex characters. */ + if (enable_h_tick_hex) + { + char quot; + + quot = GET (); + if (quot == '\'') + { + UNGET ('x'); + ch = '0'; + } + else + UNGET (quot); + } +#endif + /* Fall through. */ + case LEX_IS_SYMBOL_COMPONENT: if (state == 10) { @@ -1270,12 +1346,12 @@ do_scrub_chars (int (*get) (char *, int), char *tostart, int tolen) #ifdef TC_Z80 /* "af'" is a symbol containing '\''. */ - if (state == 3 && (ch == 'a' || ch == 'A')) + if (state == 3 && (ch == 'a' || ch == 'A')) { state = 16; PUT (ch); ch = GET (); - if (ch == 'f' || ch == 'F') + if (ch == 'f' || ch == 'F') { state = 17; PUT (ch); @@ -1284,9 +1360,10 @@ do_scrub_chars (int (*get) (char *, int), char *tostart, int tolen) else { state = 9; - if (!IS_SYMBOL_COMPONENT (ch)) + if (ch == EOF || !IS_SYMBOL_COMPONENT (ch)) { - UNGET (ch); + if (ch != EOF) + UNGET (ch); break; } } @@ -1305,7 +1382,7 @@ do_scrub_chars (int (*get) (char *, int), char *tostart, int tolen) ) { char *s; - int len; + ptrdiff_t len; for (s = from; s < fromend; s++) { @@ -1373,7 +1450,15 @@ do_scrub_chars (int (*get) (char *, int), char *tostart, int tolen) the space. We don't have enough information to make the right choice, so here we are making the choice which is more likely to be correct. */ - PUT (' '); + if (to + 1 >= toend) + { + /* If we're near the end of the buffer, save the + character for the next time round. Otherwise + we'll lose our state. */ + UNGET (ch); + goto tofull; + } + *to++ = ' '; } state = 3; @@ -1387,6 +1472,10 @@ do_scrub_chars (int (*get) (char *, int), char *tostart, int tolen) fromeof: /* We have reached the end of the input. */ +#ifdef TC_ARM + if (to > tostart) + last_char = to[-1]; +#endif return to - tostart; tofull: @@ -1400,6 +1489,9 @@ do_scrub_chars (int (*get) (char *, int), char *tostart, int tolen) else saved_input = NULL; +#ifdef TC_ARM + if (to > tostart) + last_char = to[-1]; +#endif return to - tostart; } -