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* config/tc-m68k.c (m68k_ip): Accept 'B' as a size for an 

immediate value.
	(md_assemble): If the size is 'B', set fx_signed.
	(md_apply_fix_2): Use fx_signed when checking for overflow.

	* write.h (struct fix): Add fx_signed field.
	* write.c (fix_new_internal): Initialize fx_no_overflow and
	fx_signed fields.
	(fixup_segment): Use fx_signed when checking for overflow.
	* config/obj-coff.c (fixup_segment): Check fx_no_overflow and
	fx_signed when checking for overflow.
This commit is contained in:
Ian Lance Taylor 1997-01-03 17:14:02 +00:00
parent de224d6a49
commit a78bc55196
4 changed files with 48 additions and 10 deletions
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14
gas/ChangeLog
View File

@ -1,3 +1,17 @@
Fri Jan 3 12:09:24 1997 Ian Lance Taylor <ian@cygnus.com>
* config/tc-m68k.c (m68k_ip): Accept 'B' as a size for an
immediate value.
(md_assemble): If the size is 'B', set fx_signed.
(md_apply_fix_2): Use fx_signed when checking for overflow.
* write.h (struct fix): Add fx_signed field.
* write.c (fix_new_internal): Initialize fx_no_overflow and
fx_signed fields.
(fixup_segment): Use fx_signed when checking for overflow.
* config/obj-coff.c (fixup_segment): Check fx_no_overflow and
fx_signed when checking for overflow.
Thu Jan 2 13:37:29 1997 Ian Lance Taylor <ian@cygnus.com>
* NOTES, NOTES.config: Removed. These are rarely, if ever,

16
gas/config/obj-coff.c
View File

@ -1,5 +1,5 @@
/* coff object file format
Copyright (C) 1989, 90, 91, 92, 93, 94, 95, 1996
Copyright (C) 1989, 90, 91, 92, 93, 94, 95, 96, 1997
Free Software Foundation, Inc.
This file is part of GAS.
@ -4083,17 +4083,21 @@ fixup_segment (segP, this_segment_type)
#endif
} /* if pcrel */
if (!fixP->fx_bit_fixP)
if (!fixP->fx_bit_fixP && ! fixP->fx_no_overflow)
{
#ifndef TC_M88K
/* The m88k uses the offset field of the reloc to get around
this problem. */
if ((size == 1
&& (add_number & ~0xFF)
&& ((add_number & ~0xFF) != (-1 & ~0xFF)))
&& ((add_number & ~0xFF)
|| (fixP->fx_signed && (add_number & 0x80)))
&& ((add_number & ~0xFF) != (-1 & ~0xFF)
|| (fixP->fx_signed && (add_number & 0x80) == 0)))
|| (size == 2
&& (add_number & ~0xFFFF)
&& ((add_number & ~0xFFFF) != (-1 & ~0xFFFF))))
&& ((add_number & ~0xFFFF)
|| (fixP->fx_signed && (add_number & 0x8000)))
&& ((add_number & ~0xFFFF) != (-1 & ~0xFFFF)
|| (fixP->fx_signed && (add_number & 0x8000) == 0))))
{
as_bad_where (fixP->fx_file, fixP->fx_line,
"Value of %ld too large for field of %d bytes at 0x%lx",

16
gas/config/tc-m68k.c
View File

@ -1152,6 +1152,11 @@ m68k_ip (instring)
&& (opP->disp.exp.X_op != O_constant
|| ! isbyte (opP->disp.exp.X_add_number)))
losing++;
else if (s[1] == 'B'
&& ! isvar (&opP->disp)
&& (opP->disp.exp.X_op != O_constant
|| ! issbyte (opP->disp.exp.X_add_number)))
losing++;
else if (s[1] == 'w'
&& ! isvar (&opP->disp)
&& (opP->disp.exp.X_op != O_constant
@ -2289,6 +2294,13 @@ m68k_ip (instring)
the_ins.reloc[the_ins.nrel - 1].n =
(opcode->m_codenum) * 2 + 1;
break;
case 'B':
if (!issbyte (tmpreg))
opP->error = "out of range";
opcode->m_opcode |= tmpreg;
if (isvar (&opP->disp))
the_ins.reloc[the_ins.nrel - 1].n = opcode->m_codenum * 2 - 1;
break;
case 'w':
if (!isword (tmpreg))
opP->error = "out of range";
@ -3337,6 +3349,8 @@ md_assemble (str)
get_reloc_code (n, the_ins.reloc[m].pcrel,
the_ins.reloc[m].pic_reloc));
fixP->fx_pcrel_adjust = the_ins.reloc[m].pcrel_fix;
if (the_ins.reloc[m].wid == 'B')
fixP->fx_signed = 1;
}
return;
}
@ -3888,7 +3902,7 @@ md_apply_fix_2 (fixP, val)
like "0xff" for a byte field. So extend the upper part of the range
to accept such numbers. We arbitrarily disallow "-0xff" or "0xff+0xff",
so that we can do any range checking at all. */
if (!fixP->fx_pcrel)
if (! fixP->fx_pcrel && ! fixP->fx_signed)
upper_limit = upper_limit * 2 + 1;
if ((addressT) val > upper_limit

12
gas/write.c
View File

@ -1,5 +1,5 @@
/* write.c - emit .o file
Copyright (C) 1986, 87, 90, 91, 92, 93, 94, 95, 1996
Copyright (C) 1986, 87, 90, 91, 92, 93, 94, 95, 96, 1997
Free Software Foundation, Inc.
This file is part of GAS, the GNU Assembler.
@ -162,6 +162,8 @@ fix_new_internal (frag, where, size, add_symbol, sub_symbol, offset, pcrel,
fixP->fx_addnumber = 0;
fixP->fx_tcbit = 0;
fixP->fx_done = 0;
fixP->fx_no_overflow = 0;
fixP->fx_signed = 0;
#ifdef TC_FIX_TYPE
TC_INIT_FIX_DATA(fixP);
@ -2560,8 +2562,12 @@ fixup_segment (fixP, this_segment_type)
the host architecture. */
mask <<= size * 4;
mask <<= size * 4;
if ((add_number & mask) != 0
&& (add_number & mask) != mask)
if (((add_number & mask) != 0
|| (fixP->fx_signed
&& (add_number & (mask >> 1)) != 0))
&& ((add_number & mask) != mask
|| (fixP->fx_signed
&& (add_number & (mask >> 1)) == 0)))
{
char buf[50], buf2[50];
sprint_value (buf, fragP->fr_address + where);