PIC enhancements just checked in (based on work of Paul Kranenburg and Eric

Youngdale).

New debugging code for .gdbinit.  "this file generated..." msg in config.h.

diff --git a/gas/ChangeLog b/gas/ChangeLog
index cb06ca0..09435a9 100644 (file)
--- a/gas/ChangeLog
+++ b/gas/ChangeLog
@@ -1,3 +1,67 @@
+Mon Sep 12 20:56:38 1994  Ken Raeburn  (raeburn@kr-laptop.cygnus.com)
+
+       * .gdbinit (pe, ps): Define new commands.
+       * symbols.c (indent_level): New static variable.
+       (indent, print_expr_1, print_symbol_value_1, print_symbol_value,
+       print_expr): New functions.
+
+       * Makefile.in (config-stamp): Add a "this file generated by make"
+       message to config.h.
+
+       PIC implementation for i386-linux, based on code from Eric
+       Youngdale and Paul Kranenburg, with some work of my own:
+
+       * write.c (fixup_segment): Test TC_RELOC_RTSYM_LOC_FIXUP on fixup
+       before processing same-section pcrel relocations.
+       (TC_RELOC_RTSYM_LOC_FIXUP): Default to 1.
+
+       * expr.c (make_expr_symbol): If operator is O_symbol and
+       X_add_number is zero, just return the symbol.  If operator is
+       O_constant, resolve the symbol's value before returning.
+       (operand): Permit use of "[]" for grouping.
+       (clean_up_expression): For difference of two symbols in the same
+       frag, add the difference of their offsets into X_add_number.
+       (expr): Reduce difference of two symbols in same frag to their
+       difference.
+
+       * config/tc-i386.c (TC_RELOC): New macro.
+       (struct _i386_insn): New field disp_reloc.
+       (GOT_symbol): New variable.
+       (operand_special_chars): Added square-brackets and at-sign.
+       (reloc) [BFD_ASSEMBLER]: Added new argument OTHER; if it is not
+       NO_RELOC, just return it.
+       (reloc) [! BFD_ASSEMBLER]: Add third argument to dummy macro.
+       (BFD_RELOC_386_PLT32, _GOT32, _GOTOFF) [! BFD_ASSEMBLER]: More
+       dummy macros.
+       (tc_i386_fix_adjustable): New function.  Returns zero if symbol in
+       fixup is not local, to prevent relocations against externals from
+       being dropped.
+       (md_assemble): Initialize disp_reloc field to NO_RELOC.  Pass
+       disp_reloc field to reloc() function, and use TC_RELOC to generate
+       value to pass to fix_new_exp.
+       (md_assemble): Change 32-bit reloc against GOT_symbol into a GOTPC
+       reloc.
+       (i386_operand): Initialize disp_reloc field to NO_RELOC.  Handle
+       @GOTOFF, @PLT, @GOT operands.  For GOTOFF relocations with local
+       symbols, force generation of the section symbol.
+       (md_estimate_size_before_relax): If GOT_symbol exists, decide
+       we're generating PIC code, and convert relocations against
+       undefined symbols from PCREL to PLT32.
+       (md_apply_fix_1) [OBJ_ELF]: Fix up values for dynamic-linking
+       relocs.
+       (md_undefined_symbol): Notice GLOBAL_OFFSET_TABLE_NAME and set
+       and return GOT_symbol if it matches.
+       (F, MAP): Move macro definitions outside function.
+       (tc_gen_reloc): Only switch on size and pcrel if code wasn't
+       already supplied as PLT32. GOT32, GOTOFF, or GOTPC.  Convert
+       BFD_RELOC_32 using GOT_symbol into GOTPC.
+       * config/tc-i386.h (TC_RELOC, tc_fix_adjustable,
+       TC_RELOC_GLOBAL_OFFSET_TABLE, TC_RELOC_RTSYM_LOC_FIXUP): New
+       macros.
+       (NEED_FX_R_TYPE): Define.
+       (LOCAL_LABEL): Accept ".X" prefix too.
+       (GLOBAL_OFFSET_TABLE_NAME): Default to "_GLOBAL_OFFSET_TABLE_".
+
 Mon Sep 12 17:51:39 1994  Ian Lance Taylor  (ian@sanguine.cygnus.com)
 
        * config/obj-elf.c (obj_elf_type): Rewrite to accept syntax