/* #define DEBUG_SYMS / * to debug symbol list maintenance. */
-#include <ctype.h>
-
#include "as.h"
+#include "safe-ctype.h"
#include "obstack.h" /* For "symbols.h" */
#include "subsegs.h"
if (! symbols_case_sensitive)
{
- unsigned char *s;
+ char *s;
- for (s = (unsigned char *) ret; *s != '\0'; s++)
- if (islower (*s))
- *s = toupper (*s);
+ for (s = ret; *s != '\0'; s++)
+ *s = TOUPPER (*s);
}
return ret;
while ((c = *orig++) != '\0')
{
- if (islower (c))
- c = toupper (c);
- *copy++ = c;
+ *copy++ = TOUPPER (c);
}
*copy = '\0';
}
case O_symbol:
case O_symbol_rva:
left = resolve_symbol_value (add_symbol);
- do_symbol:
+ seg_left = S_GET_SEGMENT (add_symbol);
+ if (finalize_syms)
+ symp->sy_value.X_op_symbol = NULL;
+ do_symbol:
if (symp->sy_mri_common)
{
/* This is a symbol inside an MRI common section. The
- relocation routines are going to handle it specially.
- Don't change the value. */
+ relocation routines are going to handle it specially.
+ Don't change the value. */
resolved = symbol_resolved_p (add_symbol);
break;
}
copy_symbol_attributes (symp, add_symbol);
}
- /* If we have equated this symbol to an undefined symbol, we
- keep X_op set to O_symbol, and we don't change
- X_add_number. This permits the routine which writes out
- relocation to detect this case, and convert the
- relocation to be against the symbol to which this symbol
- is equated. */
+ /* If we have equated this symbol to an undefined or common
+ symbol, keep X_op set to O_symbol, and don't change
+ X_add_number. This permits the routine which writes out
+ relocation to detect this case, and convert the
+ relocation to be against the symbol to which this symbol
+ is equated. */
if (! S_IS_DEFINED (add_symbol) || S_IS_COMMON (add_symbol))
{
if (finalize_syms)
{
- final_seg = S_GET_SEGMENT (add_symbol);
symp->sy_value.X_op = O_symbol;
symp->sy_value.X_add_symbol = add_symbol;
symp->sy_value.X_add_number = final_val;
+ /* Use X_op_symbol as a flag. */
+ symp->sy_value.X_op_symbol = add_symbol;
+ final_seg = seg_left;
}
final_val = 0;
resolved = symbol_resolved_p (add_symbol);
symp->sy_resolving = 0;
goto exit_dont_set_value;
}
+ else if (finalize_syms && final_seg == expr_section
+ && seg_left != expr_section)
+ {
+ /* If the symbol is an expression symbol, do similarly
+ as for undefined and common syms above. Handles
+ "sym +/- expr" where "expr" cannot be evaluated
+ immediately, and we want relocations to be against
+ "sym", eg. because it is weak. */
+ symp->sy_value.X_op = O_symbol;
+ symp->sy_value.X_add_symbol = add_symbol;
+ symp->sy_value.X_add_number = final_val;
+ symp->sy_value.X_op_symbol = add_symbol;
+ final_seg = seg_left;
+ final_val += symp->sy_frag->fr_address + left;
+ resolved = symbol_resolved_p (add_symbol);
+ symp->sy_resolving = 0;
+ goto exit_dont_set_value;
+ }
else
{
final_val += symp->sy_frag->fr_address + left;
if (final_seg == expr_section || final_seg == undefined_section)
- final_seg = S_GET_SEGMENT (add_symbol);
+ final_seg = seg_left;
}
resolved = symbol_resolved_p (add_symbol);
/* Simplify addition or subtraction of a constant by folding the
constant into X_add_number. */
- if (op == O_add || op == O_subtract)
+ if (op == O_add)
{
if (seg_right == absolute_section)
{
- if (op == O_add)
- final_val += right;
- else
- final_val -= right;
- op = O_symbol;
- op_symbol = NULL;
+ final_val += right;
goto do_symbol;
}
- else if (seg_left == absolute_section && op == O_add)
+ else if (seg_left == absolute_section)
{
- op = O_symbol;
final_val += left;
add_symbol = op_symbol;
left = right;
- op_symbol = NULL;
+ seg_left = seg_right;
goto do_symbol;
}
}
+ else if (op == O_subtract)
+ {
+ if (seg_right == absolute_section)
+ {
+ final_val -= right;
+ goto do_symbol;
+ }
+ }
+
+ /* Equality and non-equality tests are permitted on anything.
+ Subtraction, and other comparison operators are permitted if
+ both operands are in the same section. Otherwise, both
+ operands must be absolute. We already handled the case of
+ addition or subtraction of a constant above. This will
+ probably need to be changed for an object file format which
+ supports arbitrary expressions, such as IEEE-695.
- /* Subtraction is permitted if both operands are in the same
- section. Otherwise, both operands must be absolute. We
- already handled the case of addition or subtraction of a
- constant above. This will probably need to be changed
- for an object file format which supports arbitrary
- expressions, such as IEEE-695. */
- /* Don't emit messages unless we're finalizing the symbol value,
+ Don't emit messages unless we're finalizing the symbol value,
otherwise we may get the same message multiple times. */
- if ((seg_left != absolute_section
- || seg_right != absolute_section)
- && (op != O_subtract
+ if (op != O_eq && op != O_ne
+ && (seg_left != absolute_section
+ || seg_right != absolute_section)
+ && ((op != O_subtract
+ && op != O_lt && op != O_le && op != O_ge && op != O_gt)
|| seg_left != seg_right
- || seg_left == undefined_section)
+ || (seg_left == undefined_section
+ && add_symbol != op_symbol))
&& finalize_syms)
{
char *file;
if ((op == O_divide || op == O_modulus) && right == 0)
{
/* If seg_right is not absolute_section, then we've
- already issued a warning about using a bad symbol. */
+ already issued a warning about using a bad symbol. */
if (seg_right == absolute_section && finalize_syms)
{
char *file;
case O_bit_and: left &= right; break;
case O_add: left += right; break;
case O_subtract: left -= right; break;
- case O_eq: left = left == right ? ~ (offsetT) 0 : 0; break;
- case O_ne: left = left != right ? ~ (offsetT) 0 : 0; break;
+ case O_eq:
+ case O_ne:
+ left = (left == right && seg_left == seg_right
+ && (seg_left != undefined_section
+ || add_symbol == op_symbol)
+ ? ~ (offsetT) 0 : 0);
+ if (symp->sy_value.X_op == O_ne)
+ left = ~left;
+ break;
case O_lt: left = left < right ? ~ (offsetT) 0 : 0; break;
case O_le: left = left <= right ? ~ (offsetT) 0 : 0; break;
case O_ge: left = left >= right ? ~ (offsetT) 0 : 0; break;
if (s[index] != 'L')
return s;
- for (label_number = 0, p = s + index + 1; isdigit ((unsigned char) *p); ++p)
+ for (label_number = 0, p = s + index + 1; ISDIGIT (*p); ++p)
label_number = (10 * label_number) + *p - '0';
if (*p == DOLLAR_LABEL_CHAR)
else
return s;
- for (instance_number = 0, p++; isdigit ((unsigned char) *p); ++p)
+ for (instance_number = 0, p++; ISDIGIT (*p); ++p)
instance_number = (10 * instance_number) + *p - '0';
message_format = _("\"%d\" (instance number %d of a %s label)");
return s->sy_value.X_op == O_symbol;
}
+/* Return whether a symbol is equated to another symbol, and should be
+ treated specially when writing out relocs. */
+
+int
+symbol_equated_reloc_p (s)
+ symbolS *s;
+{
+ if (LOCAL_SYMBOL_CHECK (s))
+ return 0;
+ /* X_op_symbol, normally not used for O_symbol, is set by
+ resolve_symbol_value to flag expression syms that have been
+ equated. */
+ return (s->sy_value.X_op == O_symbol
+ && ((s->sy_resolved && s->sy_value.X_op_symbol != NULL)
+ || ! S_IS_DEFINED (s)
+ || S_IS_COMMON (s)));
+}
+
/* Return whether a symbol has a constant value. */
int
projects / deliverable / binutils-gdb.git / blobdiff