TODO for coalesced symbols:
- Should external relocation entries for defined coalesced symbols only be
created with -dynamic and not -static?
TODO:
- Add MacOS line termination \r .
Known bugs:
- The assembly line:
bl ""foo""
causes the symbol name "" to be used.
- cmpwi seems to be the same as cmpi for PowerPC.
- Can't optimize because of compiler bug #50416 prevents line 235 in symbols.c
from working (currently has #pragma CC_OPT_OFF and #pragma CC_OPT_RESUME
around that routine).
- The m88k instruction "tb0 0,r0,undef" trashes the instruction because of
the undefined.
- 68k does not handle packed immediates (the tables have been changed to dis-
allow this) because there is no routine to convert a flonum to a 68k packed
form.
- The logical operators && and || are not implemented.
Bugs to be fixed:
- The m68k "jmp @(_foo)" is not legal and needs to be flaged.
- The PowerPC extended branch mnemonic like beqlrl need to take a CRFONLY or
a number shifted over by 2 (like the fcmpu instruction).
Changes for the 5.25 release (the cctools-697 release):
Changes for the 5.25 release (the cctools-689 release):
- Fixed a place that needed force_cpusubtype_ALL tested in md_assemble() in
arm.c . Radar bug #5817558.
- Added support for the special assembly time constant expression of the diff-
erence of two symbols defined in the same section then divided by exactly 2.
- Added the field X_sectdiff_divide_by_two to the expressionS typedef in
expr.h .
- In expr() in expr.c added code to look for an expression with a SEG_DIFFSECT
and a left side with an SEG_ABSOLUTE X_add_number == 2 and a O_divide right
side and if so set the new X_sectdiff_divide_by_two field.
- Added the field fx_sectdiff_divide_by_two to the struct fix.
- Changed cons() in read.c to save the fix for a SEG_DIFFSECT and to copy the
the new X_sectdiff_divide_by_two field from the expression to the new
fx_sectdiff_divide_by_two field in the fix.
- In fixup_section() in layout.c added code to test the news
fx_sectdiff_divide_by_two field and if so divide the value by 2. And check
to see that the expression is an assembly time constant.
Changes for the 5.25 release (the cctools-686 release):
- Changed arm_relax_frag() in arm.c to take a section number for the section it
is operating on. That is in turn now passed to relax_branch() in arm.c and
in there if the symbol that is being branched to is not for that section it
returns 4 for the size of the instruction.
- In md_apply_fix() for BFD_RELOC_THUMB_PCREL_BRANCH25 the fx_r_type type is
set to BFD_RELOC_THUMB_PCREL_BRANCH23 so it can be output as a known
relocation type (ARM_THUMB_RELOC_BR22).
Changes for the 5.25 release (the cctools-685 release):
- Changed relaxed_symbol_addr() in arm.c to also add in
fragp->fr_symbol->sy_nlist.n_value when calculating the addr. Without this
it can some times get "branch out of range" errors since it appears this
to have the address of the symbol from the start of the fragment.
- Changed the check in md_assemble() in arm.c for "width suffixes are invalid
in ARM mode" to allow them with unified syntax.
- Changed the arm APPLE LOCAL trap instruction opcode entry in arm.c from this:
CE(trap, 7ffdefe, 0, (), noargs),
to this:
TUE(trap, 7ffdefe, defe, 0, (), noargs, noargs),
which allows it to work with thumb mode.
- Changed relax_section() in layout.c in two plaves #ifdef'ed ARM. In the first
look it now sets frag's relax_marker field to zero. In the "Do relax" loop
it flips the relax_marker field with an "^= 1". This is to fix a problem in
relaxed_symbol_addr() so it knows to add the stretch amount to the addr it
is returning.
- Added a second call to as_file_and_line() in frag_var() in frags.c which was
#ifdef ARM at the top of the file to set the fr_file and fr_line fields of
the current frag before creating a new frag. This is needed because as the
line number of the last instruction which is the "relaxable" instruction is
the line number that is needed (not the first one). So when relax_section()
calls arm_relax_frag() which calls md_convert_frag() it will call
fix_new_exp() and fix_new_internal() so a new fix may be created after all
code is read for the last instruction in the frag. So md_convert_frag()
copies the fr_file and fr_line fields of the frag into the fx_file and fx_line
fields of the fix so line numbers can be reported.
Changes for the 5.25 release (the cctools-684 release):
- Changed relaxed_symbol_addr() in arm.c to not use the hack ported
S_GET_VALUE() as at that point the symbol does not have the value set. The
code was #ifdef NOTYET to use fragp->fr_symbol->sy_frag->fr_address to get
the address from the symbol's frag. The hack ported S_GET_VALUE() routine
was removed from symbols.[ch].
- Changed relax_addsub() where it had a memcpy() hack in place of the
#ifdef NOTYET out call to bfd_get_16() to a call to a call to
md_chars_to_number() to retrive the old thumb opcode into op that
output_relax_insn() put into the frag.
- Added a call to as_file_and_line() in frag_var() in frags.c which was #ifdef
ARM to set the fr_file and fr_line fields of the frag. This is needed because
when relax_section() calls arm_relax_frag() which calls md_convert_frag()
it will call fix_new_exp() and fix_new_internal() so a new fix will be created
after all code is read. So md_convert_frag() copies the fr_file and fr_line
fields of the frag into the fx_file and fx_line fields of the fix so line
numbers can be reported.
Changes for the 5.25 release (the cctools-683 release):
- Fixed a bug in fix_new_arm() in arm.c after the call to fix_new_exp() before
the default: case label as missing a break; statement.
- Fixed a bug in relax_section() in layout.c for the "Do relax" loop where
the call to arm_relax_frag() should have set the variable growth not
incremented. The "+=" was change to just an assignment, "=".
Changes for the 5.25 release (the cctools-682 release):
- Changed relax_section() in layout.c for the "Do relax" loop and #ifdef'ed
ARM the rs_machine_dependent case to call arm_relax_frag().
- Changed md_convert_frag() where it had a memcpy() hack in place of the
#ifdef NOTYET out call to bfd_get_16() to a call to a call to
md_chars_to_number() to retrive the old thumb opcode into old_op that
output_relax_insn() put into the frag.
Changes for the 5.25 release (the cctools-681 release):
- Removed all __OPEN_SOURCE__ references in Makefile, notes, as.c, layout.c,
messages.c, symbols.c, write_object.c, frags.h and symbols.h .
- Fixed a bug in the table entries for the pextrq and pinsrq instructions as
they should have had Size64 to force the REX.W byte.
- Fixed a bug in the table entries for the i386 SSE4.1 instruction insertps
where it had the second parameter as a general register not a xmm register.
The change was in i386-opcode.h to change Reg32 and Reg64 to RegXMM.
Radar bug #5650346.
- Changed output_relax_insn() in arm.c to just used the undefined symbol instead
of calling make_expr_symbol() if the expression is a just an undefined symbol
and no subtract symbol.
Changes for the 5.25 release (the cctools-680 release):