is support for cross-section relative symbol references using "sym-$".
This generates a 32-bit relative relocation similar to those used for
cross-section jumps and calls.
The bugfix is that in Win64 output, RIP-relative relocations do something
special when there is an immediate value (or anything else) between the
value being relocated and the next instruction. E.g.
"shl dword [sym wrt rip], 5" needs to generate a REL32_1 relocation thanks
to the immediate byte following the RIP-relative value.
* symrec.c (sym_type): add SYM_CURPOS to track labels representing the
current assembly position (e.g. $ in NASM, . in GAS).
(yasm_symtab_define_curpos): New function to create symbols of this type.
(yasm_symrec_is_curpos): Check to see if symbol is SYM_CURPOS type.
(yasm_symrec_get_label, yasm_symrec_print): Update to handle SYM_CURPOS.
* symrec.h (yasm_symtab_define_curpos): Prototype.
(yasm_symrec_is_curpos): Prototype.
* gas-bison.y: Use yasm_symtab_define_curpos when defining '.'.
* nasm-bison.y: Use yasm_symtab_define_curpos when defining '$'.
* value.c (yasm_value_finalize_expr): Look for cross-section
"sym-SYM_CURPOS" combinations and generate curpos-relative value if found.
* coretype.h (yasm_value): Add ip_rel member to designate that curpos_rel
is set due to the value being IP-relative (rather than sym-curpos).
* value.h (yasm_value_initialize, yasm_value_init_sym): Initialize ip_rel.
* x86expr.c (yasm_x86__check_ea): Set ip_rel in addition to curpos_rel if
detected WRT rip.
* x86bc.c (x86_bc_insn_tobytes): Use ip_rel instead of curpos_rel when
adjusting for RIP-relative.
* coff-objfmt.c (coff_objfmt_output_value): Properly adjust output and
generate correct relocations for both curpos_rel and ip_rel. This
includes new generation of REL32_1, REL32_2, etc relocations.
* symrec.c, symrec.h (yasm_symtab_define_label2): Delete.
* coff-objfmt.c (stabs_debgfmt_generate_sections): Change to use
yasm_symtab_define_label() instead.
* win32-curpos.asm, win64-curpos.asm, curpos.asm, curpos-err.asm,
elf_gas64_curpos.asm: New tests for above.
svn path=/trunk/yasm/; revision=1423
* gas-bison.y (gas_get_section, gas_switch_section): Add parameter builtin
to indicate gas flags should not be generated.
svn path=/trunk/yasm/; revision=1299
This work is being done under contract with a company that has requested
to remain unnamed at the present time.
* bc-int.h (yasm_effaddr): Add strong flag to indicate if the effective
address is definitely an effective address; GAS does not use [] to designate
effective addresses so it's otherwise impossible to tell the difference
between "expr(,1)" and just "expr" (important for the relative jump
instructions).
* bytecode.h (yasm_ea_set_strong): New function to set the strong flag.
* bytecode.c (yasm_ea_set_strong): Implementation.
* x86bc.c (yasm_x86__ea_create_reg): Initialize strong flag.
* arch.h (yasm_insn_operand): Add deref flag to indicate use of "*foo" in
GAS syntax.
* arch.c (yasm_operand_create_reg, yasm_operand_create_segreg)
(yasm_operand_create_mem, yasm_operand_create_imm): Set deref flag to 0.
* gas: GAS syntax lexer and parser. Not all directives are implemented yet
(some will require additional core bytecodes).
* elf-objfmt.c (elf_objfmt_section_switch): Add support for GAS-style
section flags.
* x86arch.h (yasm_arch_x86): Add parser setting.
* x86arch.c (x86_create): Check for gas parser and initialize setting.
* x86bc.c (yasm_x86__ea_create_expr): Transform val+RIP to val wrt RIP when
using the GAS parser (this is how GAS interprets "expr(%rip)").
* x86id.re: Too many changes to enumerate in detail. Add new modifiers for
GAS suffixes. Start using them in a couple instructions. Split check_id
into subfunctions (still one entry point at present).
(yasm_x86__finalize_insn): Support new modifiers, reverse operands, derefs.
* yasm.c (main): Change all undef to extern when using GAS parser (this is
default GAS behavior).
svn path=/trunk/yasm/; revision=1239
shortening to signed 8-bit immediate from a larger immediate size. This
yields much smaller code for many arithmetic instructions.
Noticed by: Brian Gladman <brg@gladman.plus.com>
svn path=/trunk/yasm/; revision=1227
object formats without creating duplicate lists of symbols. XDF and COFF
were updated; ELF needs to reorder the symbols on its own, so for now it's
not been updated to use the common implementation.
* hamt.c (HAMTEntry, HAMT, HAMT_destroy)
(HAMT_insert): Change SLIST to STAILQ.
* symrec.c (sym_type): Add SYM_SPECIAL.
(yasm_symtab_define_special): New.
(yasm_symrec_declare): New; includes all functionality from symtab_declare.
(yasm_symtab_declare): Call yasm_symrec_declare now.
(yasm_symrec_is_special): New.
* symrec.h: Add prototypes for above.
* xdf-objfmt.c: Use symrec_data instead of declaring xdf_symtab.
* xdflong.hex, xdfprotect.hex, xdfother.hex: Update due to symbol reordering.
* coff-objfmt.c: Use symrec_data instead of declaring coff_symtab.
* elftimes.hex, elfso.hex, elfabssect.hex: Update due to symbol reordering.
* elfglobext.hex, elf-x86id.hex, elftest.hex, elfso64.hex: Likewise.
* stabs-elf.hex: Likewise.
svn path=/trunk/yasm/; revision=1188
ELF objfmt implementation.
Assumed to be correct for the test cases, but only tested as far as feasible.
Currently only implements 32bit 386 little-endian, but is mostly abstracted
well enough to easily add more machines.
svn path=/trunk/yasm/; revision=1015
To ensure all section start addresses are known, added a first pre-pass of
sections to calculate each one's address.
svn path=/trunk/yasm/; revision=775
Peter Johnson
Michael Urman