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authorKen Raeburn <raeburn@cygnus>1994-09-13 02:20:55 +0000
committerKen Raeburn <raeburn@cygnus>1994-09-13 02:20:55 +0000
commitc570d361394e997645dc05171fabf212cba7c48d (patch)
tree97c333b35c276d180acbb503c492c3cce3a45840 /gas
parentf0b37b4ad64b9ff80992f5242512e6ffcc2f3680 (diff)
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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.
Diffstat (limited to 'gas')
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diff --git a/gas/ChangeLog b/gas/ChangeLog
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--- a/gas/ChangeLog
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+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