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Riscv ld-elf/stab failure and fake label cleanup.

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* as.c: Include write.h.
	(common_emul_init): Use FAKE_LABEL_NAME.
	* ecoff.c (add_file, ecoff_directive_end, ecoff_directive_loc):
	Likewise.
	(ecoff_build_symbols): Use FAKE_LABEL_CHAR.
	* expr.c (get_symbol_name): Use FAKE_LABEL_CHAR.  Accept only if
	input_from_string is TRUE.
	* read.c (input_from_string): New.
	(read_symbol_name): Use FAKE_LABEL_CHAR.  Accept only if
	input_from_string is TRUE.
	(temp_ilp): Set input_from_string to TRUE.
	(restore_ilp): Set input_from_string to FALSE.
	* read.h (input_from_string): Declare.
	* symbols.c: Include write.h
	(S_IS_LOCAL): Check for FAKE_LABEL_CHAR.
	(symbol_relc_make_sym): Fix comment refering to default fake label
	string.
	* write.h (FAKE_LABEL_CHAR): New.
	* config/tc-riscv.h (FAKE_LABEL_CHAR): Define.
	* testsuite/gas/all/err-fakelabel.s: New.
This commit is contained in:
Jim Wilson 2017-11-22 11:20:48 -08:00
parent 2ca23e65f5
commit 2469b3c584
10 changed files with 57 additions and 14 deletions
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21
gas/ChangeLog
View File

@ -1,5 +1,26 @@
2017-11-22 Jim Wilson <jimw@sifive.com>
* as.c: Include write.h.
(common_emul_init): Use FAKE_LABEL_NAME.
* ecoff.c (add_file, ecoff_directive_end, ecoff_directive_loc):
Likewise.
(ecoff_build_symbols): Use FAKE_LABEL_CHAR.
* expr.c (get_symbol_name): Use FAKE_LABEL_CHAR. Accept only if
input_from_string is TRUE.
* read.c (input_from_string): New.
(read_symbol_name): Use FAKE_LABEL_CHAR. Accept only if
input_from_string is TRUE.
(temp_ilp): Set input_from_string to TRUE.
(restore_ilp): Set input_from_string to FALSE.
* read.h (input_from_string): Declare.
* symbols.c: Include write.h
(S_IS_LOCAL): Check for FAKE_LABEL_CHAR.
(symbol_relc_make_sym): Fix comment refering to default fake label
string.
* write.h (FAKE_LABEL_CHAR): New.
* config/tc-riscv.h (FAKE_LABEL_CHAR): Define.
* testsuite/gas/all/err-fakelabel.s: New.
* doc/as.texinfo (.align): Change some to most for text nop fill.
(.balign, .p2align): Likewise.

5
gas/as.c
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@ -39,6 +39,7 @@
#include "dwarf2dbg.h"
#include "dw2gencfi.h"
#include "bfdver.h"
#include "write.h"
#ifdef HAVE_ITBL_CPU
#include "itbl-ops.h"
@ -199,10 +200,10 @@ common_emul_init (void)
if (this_emulation->fake_label_name == 0)
{
if (this_emulation->leading_underscore)
this_emulation->fake_label_name = "L0\001";
this_emulation->fake_label_name = FAKE_LABEL_NAME;
else
/* What other parameters should we test? */
this_emulation->fake_label_name = ".L0\001";
this_emulation->fake_label_name = "." FAKE_LABEL_NAME;
}
}
#endif

3
gas/config/tc-riscv.h
View File

@ -39,6 +39,9 @@ struct expressionS;
sure FAKE_LABEL_NAME is printable. It still must be distinct from any
real label name. So, append a space, which other labels can't contain. */
#define FAKE_LABEL_NAME ".L0 "
/* Changing the special character in FAKE_LABEL_NAME requires changing
FAKE_LABEL_CHAR too. */
#define FAKE_LABEL_CHAR ' '
#define md_relax_frag(segment, fragp, stretch) \
riscv_relax_frag (segment, fragp, stretch)

10
gas/ecoff.c
View File

@ -2227,7 +2227,7 @@ add_file (const char *file_name, int indx ATTRIBUTE_UNUSED, int fake)
if (stabs_seen)
{
(void) add_ecoff_symbol (file_name, st_Nil, sc_Nil,
symbol_new ("L0\001", now_seg,
symbol_new (FAKE_LABEL_NAME, now_seg,
(valueT) frag_now_fix (),
frag_now),
(bfd_vma) 0, 0, ECOFF_MARK_STAB (N_SOL));
@ -3020,7 +3020,7 @@ ecoff_directive_end (int ignore ATTRIBUTE_UNUSED)
as_warn (_(".end directive names unknown symbol"));
else
(void) add_ecoff_symbol ((const char *) NULL, st_End, sc_Text,
symbol_new ("L0\001", now_seg,
symbol_new (FAKE_LABEL_NAME, now_seg,
(valueT) frag_now_fix (),
frag_now),
(bfd_vma) 0, (symint_t) 0, (symint_t) 0);
@ -3264,7 +3264,7 @@ ecoff_directive_loc (int ignore ATTRIBUTE_UNUSED)
if (stabs_seen)
{
(void) add_ecoff_symbol ((char *) NULL, st_Label, sc_Text,
symbol_new ("L0\001", now_seg,
symbol_new (FAKE_LABEL_NAME, now_seg,
(valueT) frag_now_fix (),
frag_now),
(bfd_vma) 0, 0, lineno);
@ -4104,10 +4104,10 @@ ecoff_build_symbols (const struct ecoff_debug_swap *backend,
/* If an st_end symbol has an associated gas
symbol, then it is a local label created for
a .bend or .end directive. Stabs line
numbers will have \001 in the names. */
numbers will have FAKE_LABEL_CHAR in the names. */
if (local
&& sym_ptr->ecoff_sym.asym.st != st_End
&& strchr (sym_ptr->name, '\001') == 0)
&& strchr (sym_ptr->name, FAKE_LABEL_CHAR) == 0)
sym_ptr->ecoff_sym.asym.iss =
add_string (&fil_ptr->strings,
fil_ptr->str_hash,

7
gas/expr.c
View File

@ -2369,12 +2369,13 @@ get_symbol_name (char ** ilp_return)
char c;
* ilp_return = input_line_pointer;
/* We accept \001 in a name in case this is being called with a
/* We accept FAKE_LABEL_CHAR in a name in case this is being called with a
constructed string. */
if (is_name_beginner (c = *input_line_pointer++) || c == '\001')
if (is_name_beginner (c = *input_line_pointer++)
|| (input_from_string && c == FAKE_LABEL_CHAR))
{
while (is_part_of_name (c = *input_line_pointer++)
|| c == '\001')
|| (input_from_string && c == FAKE_LABEL_CHAR))
;
if (is_name_ender (c))
c = *input_line_pointer++;

9
gas/read.c
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@ -62,6 +62,7 @@
#endif
char *input_line_pointer; /*->next char of source file to parse. */
bfd_boolean input_from_string = FALSE;
#if BITS_PER_CHAR != 8
/* The following table is indexed by[(char)] and will break if
@ -1684,16 +1685,16 @@ read_symbol_name (void)
if (mbstowcs (NULL, name, len) == (size_t) -1)
as_warn (_("symbol name not recognised in the current locale"));
}
else if (is_name_beginner (c) || c == '\001')
else if (is_name_beginner (c) || (input_from_string && c == FAKE_LABEL_CHAR))
{
ptrdiff_t len;
name = input_line_pointer - 1;
/* We accept \001 in a name in case this is
/* We accept FAKE_LABEL_CHAR in a name in case this is
being called with a constructed string. */
while (is_part_of_name (c = *input_line_pointer++)
|| c == '\001')
|| (input_from_string && c == FAKE_LABEL_CHAR))
;
len = (input_line_pointer - name) - 1;
@ -6385,6 +6386,7 @@ temp_ilp (char *buf)
input_line_pointer = buf;
buffer_limit = buf + strlen (buf);
input_from_string = TRUE;
}
/* Restore a saved input line pointer. */
@ -6396,6 +6398,7 @@ restore_ilp (void)
input_line_pointer = saved_ilp;
buffer_limit = saved_limit;
input_from_string = FALSE;
saved_ilp = NULL;
}

1
gas/read.h
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@ -19,6 +19,7 @@
02110-1301, USA. */
extern char *input_line_pointer; /* -> char we are parsing now. */
extern bfd_boolean input_from_string;
/* Define to make whitespace be allowed in many syntactically
unnecessary places. Normally undefined. For compatibility with

6
gas/symbols.c
View File

@ -25,6 +25,7 @@
#include "obstack.h" /* For "symbols.h" */
#include "subsegs.h"
#include "struc-symbol.h"
#include "write.h"
/* This is non-zero if symbols are case sensitive, which is the
default. */
@ -2161,6 +2162,9 @@ S_IS_LOCAL (symbolS *s)
&& ! S_IS_DEBUG (s)
&& (strchr (name, DOLLAR_LABEL_CHAR)
|| strchr (name, LOCAL_LABEL_CHAR)
#if FAKE_LABEL_CHAR != DOLLAR_LABEL_CHAR
|| strchr (name, FAKE_LABEL_CHAR)
#endif
|| TC_LABEL_IS_LOCAL (name)
|| (! flag_keep_locals
&& (bfd_is_local_label (stdoutput, s->bsym)
@ -3087,7 +3091,7 @@ symbol_relc_make_sym (symbolS * sym)
|| S_GET_SEGMENT (sym) == absolute_section)
return symbol_relc_make_expr (& sym->sy_value);
/* This may be a "fake symbol" L0\001, referring to ".".
/* This may be a "fake symbol", referring to ".".
Write out a special null symbol to refer to this position. */
if (! strcmp (S_GET_NAME (sym), FAKE_LABEL_NAME))
return xstrdup (".");

3
gas/testsuite/gas/all/err-fakelabel.s Normal file
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@ -0,0 +1,3 @@
;# Test that fake labels aren't accepted.
;# { dg-do assemble }
label: ;# { dg-error "Error: " }

6
gas/write.h
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@ -27,6 +27,12 @@
#define FAKE_LABEL_NAME "L0\001"
#endif
/* This is the special character used to indicate a fake symbol. Must be
present in FAKE_LABEL_NAME. */
#ifndef FAKE_LABEL_CHAR
#define FAKE_LABEL_CHAR '\001'
#endif
#include "bit_fix.h"
/*