From: Ken Raeburn <raeburn@cygnus>
Date: Tue, 13 Sep 1994 02:20:55 +0000 (+0000)
Subject: PIC enhancements just checked in (based on work of Paul Kranenburg and Eric
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=c570d361394e997645dc05171fabf212cba7c48d;p=binutils-gdb.git

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 cb06ca0eef8..09435a9732b 100644
--- 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