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authorDmitry Selyutin <ghostmansd@gmail.com>2022-07-18 12:46:53 +0300
committerAlan Modra <amodra@gmail.com>2022-07-20 12:20:14 +0930
commitffd29c9c21422ddacdd66ead68ee060ac01a28c5 (patch)
tree8a11642e5cd5e8dce66bd2ab172105d65cf7c28f
parent73d9afb778a2278c9a6fcc17f9a2c2ccbef8cce5 (diff)
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gas/symbols: introduce md_resolve_symbol
Assuming GMSD is a special operand, marked as O_md1, the code: .set VREG, GMSD .set REG, VREG extsw REG, 2 ...fails upon attempts to resolve the value of the symbol. This happens since machine-dependent values are not handled in the giant op switch. We introduce a custom md_resolve_symbol macro; the ports can use this macro to customize the behavior when resolve_symbol_value hits O_md operand.
-rw-r--r--gas/doc/internals.texi6
-rw-r--r--gas/symbols.c39
2 files changed, 45 insertions, 0 deletions
diff --git a/gas/doc/internals.texi b/gas/doc/internals.texi
index 9221801..59b2d3a 100644
--- a/gas/doc/internals.texi
+++ b/gas/doc/internals.texi
@@ -1034,6 +1034,12 @@ Predefined symbols with fixed values, such as register names or condition
codes, are typically entered directly into the symbol table when @code{md_begin}
is called. One argument is passed, a @code{char *} for the symbol.
+@item md_resolve_symbol
+@cindex md_resolve_symbol
+If this macro is defined, GAS will call it upon resolving machine-dependent
+symbols (that is, for any symbol with operation O_md1..O_md32 inclusively).
+If this functions returns zero, then the symbol could not be resolved.
+
@item md_operand
@cindex md_operand
GAS will call this function with one argument, an @code{expressionS}
diff --git a/gas/symbols.c b/gas/symbols.c
index 6904a31..81383a5 100644
--- a/gas/symbols.c
+++ b/gas/symbols.c
@@ -1408,6 +1408,45 @@ resolve_symbol_value (symbolS *symp)
BAD_CASE (op);
break;
+ case O_md1:
+ case O_md2:
+ case O_md3:
+ case O_md4:
+ case O_md5:
+ case O_md6:
+ case O_md7:
+ case O_md8:
+ case O_md9:
+ case O_md10:
+ case O_md11:
+ case O_md12:
+ case O_md13:
+ case O_md14:
+ case O_md15:
+ case O_md16:
+ case O_md17:
+ case O_md18:
+ case O_md19:
+ case O_md20:
+ case O_md21:
+ case O_md22:
+ case O_md23:
+ case O_md24:
+ case O_md25:
+ case O_md26:
+ case O_md27:
+ case O_md28:
+ case O_md29:
+ case O_md30:
+ case O_md31:
+ case O_md32:
+#ifdef md_resolve_symbol
+ resolved = md_resolve_symbol (symp, &final_val, &final_seg);
+ if (resolved)
+ break;
+#endif
+ goto exit_dont_set_value;
+
case O_absent:
final_val = 0;
/* Fall through. */