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Allow xstormy-elf-gas to handle "@fptr() - @fptr()" expressions.

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Nick Clifton
2003-05-12 09:09:11 +00:00
parent 9d29900bf7
commit e66c629e09
2 changed files with 33 additions and 0 deletions
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8
gas/ChangeLog
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@ -1,3 +1,11 @@
2003-05-12 Nick Clifton <nickc@redhat.com>
* config/tc-xstormy16.c (skipping_fptr): New local variable.
(md_assemble): Reset skipping_fptr.
(md_operand): If @fptr() is followed by a minus sign, set
skipping_fptr and ignore the fptr. If skipping_fptr is set and an
@fptr is detected, ignore it and reset skipping_fptr.
2003-05-11 Jason Eckhardt <jle@rice.edu> 2003-05-11 Jason Eckhardt <jle@rice.edu>
* config/tc-i860.c (MAX_FIXUPS): Define. * config/tc-i860.c (MAX_FIXUPS): Define.

25
gas/config/tc-xstormy16.c
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@ -104,6 +104,8 @@ md_begin ()
cgen_set_parse_operand_fn (gas_cgen_cpu_desc, gas_cgen_parse_operand); cgen_set_parse_operand_fn (gas_cgen_cpu_desc, gas_cgen_parse_operand);
} }
static bfd_boolean skipping_fptr = FALSE;
void void
md_assemble (str) md_assemble (str)
char * str; char * str;
@ -111,6 +113,10 @@ md_assemble (str)
xstormy16_insn insn; xstormy16_insn insn;
char * errmsg; char * errmsg;
/* Make sure that if we had an erroneous input line which triggered
the skipping_fptr boolean that it does not affect following lines. */
skipping_fptr = FALSE;
/* Initialize GAS's cgen interface for a new instruction. */ /* Initialize GAS's cgen interface for a new instruction. */
gas_cgen_init_parse (); gas_cgen_init_parse ();
@ -154,9 +160,28 @@ md_operand (e)
goto err; goto err;
} }
input_line_pointer++; input_line_pointer++;
SKIP_WHITESPACE ();
if (e->X_op != O_symbol) if (e->X_op != O_symbol)
as_bad ("Not a symbolic expression"); as_bad ("Not a symbolic expression");
else if (* input_line_pointer == '-')
/* We are computing the difference of two function pointers
like this:
.hword @fptr (foo) - @fptr (bar)
In this situation we do not want to generate O_fptr_symbol
operands because the result is an absolute value, not a
function pointer.
We need to make the check here, rather than when the fixup
is generated as the function names (foo & bar in the above
example) might be local symbols and we want the expression
to be evaluated now. This kind of thing can happen when
gcc is generating computed gotos. */
skipping_fptr = TRUE;
else if (skipping_fptr)
skipping_fptr = FALSE;
else else
e->X_op = O_fptr_symbol; e->X_op = O_fptr_symbol;
} }