2002-12-30 19:25:13 +00:00
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/* This file is tc-msp430.h
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2016-01-01 11:25:12 +00:00
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Copyright (C) 2002-2016 Free Software Foundation, Inc.
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2002-12-30 19:25:13 +00:00
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Contributed by Dmitry Diky <diwil@mail.ru>
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This file is part of GAS, the GNU Assembler.
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GAS is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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2007-07-03 11:01:12 +00:00
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the Free Software Foundation; either version 3, or (at your option)
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2002-12-30 19:25:13 +00:00
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any later version.
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GAS is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GAS; see the file COPYING. If not, write to the Free
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2005-05-05 09:13:19 +00:00
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Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
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02110-1301, USA. */
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2002-12-30 19:25:13 +00:00
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#define TC_MSP430
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/* By convention, you should define this macro in the `.h' file. For
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example, `tc-m68k.h' defines `TC_M68K'. You might have to use this
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if it is necessary to add CPU specific code to the object format
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file. */
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#define TARGET_FORMAT "elf32-msp430"
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/* This macro is the BFD target name to use when creating the output
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file. This will normally depend upon the `OBJ_FMT' macro. */
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#define TARGET_ARCH bfd_arch_msp430
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/* This macro is the BFD architecture to pass to `bfd_set_arch_mach'. */
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#define TARGET_MACH 0
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/* This macro is the BFD machine number to pass to
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`bfd_set_arch_mach'. If it is not defined, GAS will use 0. */
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#define TARGET_BYTES_BIG_ENDIAN 0
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/* You should define this macro to be non-zero if the target is big
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endian, and zero if the target is little endian. */
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#define ONLY_STANDARD_ESCAPES
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/* If you define this macro, GAS will warn about the use of
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nonstandard escape sequences in a string. */
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#define md_operand(x)
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/* GAS will call this function for any expression that can not be
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recognized. When the function is called, `input_line_pointer'
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will point to the start of the expression. */
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#define md_number_to_chars number_to_chars_littleendian
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/* This should just call either `number_to_chars_bigendian' or
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`number_to_chars_littleendian', whichever is appropriate. On
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targets like the MIPS which support options to change the
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endianness, which function to call is a runtime decision. On
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other targets, `md_number_to_chars' can be a simple macro. */
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#define WORKING_DOT_WORD
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/*
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`md_short_jump_size'
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`md_long_jump_size'
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`md_create_short_jump'
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`md_create_long_jump'
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If `WORKING_DOT_WORD' is defined, GAS will not do broken word
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processing (*note Broken words::.). Otherwise, you should set
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`md_short_jump_size' to the size of a short jump (a jump that is
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just long enough to jump around a long jmp) and
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`md_long_jump_size' to the size of a long jump (a jump that can go
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anywhere in the function), You should define
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`md_create_short_jump' to create a short jump around a long jump,
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and define `md_create_long_jump' to create a long jump. */
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#define MD_APPLY_FIX3
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2012-07-02 07:35:06 +00:00
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/* Values passed to md_apply_fix don't include symbol values. */
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#define MD_APPLY_SYM_VALUE(FIX) 0
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2002-12-30 19:25:13 +00:00
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#define TC_HANDLES_FX_DONE
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#undef RELOC_EXPANSION_POSSIBLE
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/* If you define this macro, it means that `tc_gen_reloc' may return
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multiple relocation entries for a single fixup. In this case, the
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return value of `tc_gen_reloc' is a pointer to a null terminated
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array. */
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#define MD_PCREL_FROM_SECTION(FIXP, SEC) md_pcrel_from_section(FIXP, SEC)
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/* If you define this macro, it should return the offset between the
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address of a PC relative fixup and the position from which the PC
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relative adjustment should be made. On many processors, the base
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of a PC relative instruction is the next instruction, so this
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macro would return the length of an instruction. */
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2004-08-25 12:54:15 +00:00
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extern long md_pcrel_from_section (struct fix *, segT);
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2002-12-30 19:25:13 +00:00
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#define LISTING_WORD_SIZE 2
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/* The number of bytes to put into a word in a listing. This affects
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the way the bytes are clumped together in the listing. For
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example, a value of 2 might print `1234 5678' where a value of 1
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would print `12 34 56 78'. The default value is 4. */
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2013-05-02 21:06:15 +00:00
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/* Support symbols like: C$$IO$$. */
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#undef LEX_DOLLAR
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#define LEX_DOLLAR 1
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2002-12-30 19:25:13 +00:00
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#define TC_IMPLICIT_LCOMM_ALIGNMENT(SIZE, P2VAR) (P2VAR) = 0
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/* An `.lcomm' directive with no explicit alignment parameter will
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use this macro to set P2VAR to the alignment that a request for
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SIZE bytes will have. The alignment is expressed as a power of
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two. If no alignment should take place, the macro definition
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should do nothing. Some targets define a `.bss' directive that is
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also affected by this macro. The default definition will set
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P2VAR to the truncated power of two of sizes up to eight bytes. */
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2004-08-25 12:54:15 +00:00
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#define md_relax_frag(SEG, FRAGP, STRETCH) \
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msp430_relax_frag (SEG, FRAGP, STRETCH)
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extern long msp430_relax_frag (segT, fragS *, long);
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2005-08-12 11:54:23 +00:00
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#define TC_FORCE_RELOCATION_LOCAL(FIX) \
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2013-05-02 21:06:15 +00:00
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msp430_force_relocation_local (FIX)
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extern int msp430_force_relocation_local (struct fix *);
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2005-08-12 11:54:23 +00:00
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2014-01-24 19:43:58 +00:00
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/* We need to add reference symbols for .data/.bss. */
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#define tc_frob_section(sec) msp430_frob_section (sec)
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extern void msp430_frob_section (asection *);
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2005-08-12 11:54:23 +00:00
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extern int msp430_enable_relax;
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extern int msp430_enable_polys;
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2013-05-02 21:06:15 +00:00
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#define tc_fix_adjustable(FIX) msp430_fix_adjustable (FIX)
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extern bfd_boolean msp430_fix_adjustable (struct fix *);
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/* Allow hexadeciaml numbers with 'h' suffix. Note that if the number
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starts with a letter it will be interpreted as a symbol name not a
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constant. Thus "beach" is a symbol not the hex value 0xbeac. So
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is A5A5h... */
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#define NUMBERS_WITH_SUFFIX 1
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#define md_end msp430_md_end
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extern void msp430_md_end (void);
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/* Do not allow call frame debug info optimization as otherwise we could
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generate the DWARF directives without the relocs necessary to patch
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them up. */
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#define md_allow_eh_opt 0
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/* The difference between same-section symbols may be affected by linker
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relaxation, so do not resolve such expressions in the assembler. */
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#define md_allow_local_subtract(l,r,s) msp430_allow_local_subtract (l, r, s)
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extern bfd_boolean msp430_allow_local_subtract (expressionS *, expressionS *, segT);
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#define RELOC_EXPANSION_POSSIBLE
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#define MAX_RELOC_EXPANSION 2
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#define DIFF_EXPR_OK
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/* Do not adjust relocations involving symbols in code sections,
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because it breaks linker relaxations. This could be fixed in the
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linker, but this fix is simpler, and it pretty much only affects
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object size a little bit. */
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#define TC_FORCE_RELOCATION_SUB_SAME(FIX, SEC) \
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2015-02-23 14:53:02 +00:00
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( ((SEC)->flags & SEC_CODE) != 0 \
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|| ((SEC)->flags & SEC_DEBUGGING) != 0 \
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2013-05-02 21:06:15 +00:00
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|| ! SEG_NORMAL (SEC) \
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|| TC_FORCE_RELOCATION (FIX))
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/* We validate subtract arguments within tc_gen_reloc(),
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so don't report errors at this point. */
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#define TC_VALIDATE_FIX_SUB(FIX, SEG) 1
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#define DWARF2_USE_FIXED_ADVANCE_PC 1
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2015-02-23 14:53:02 +00:00
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#define TC_LINKRELAX_FIXUP(seg) ((seg->flags & SEC_CODE) || (seg->flags & SEC_DEBUGGING))
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msp430: Set DWARF2_ADDR_SIZE to 4.
This change makes gas's notion of the msp430 dwarf2 address size match
that of gcc and gdb. This is needed so that the format of addresses
generated for DW_LNE_set_address in .debug_line will match the address
size for the compilation unit.
In gcc/config/msp430/msp430.h, it's set to 4:
#define DWARF2_ADDR_SIZE 4
Likewise in gdb/msp430-tdep.c:
set_gdbarch_dwarf2_addr_size (gdbarch, 4);
(As far as I can tell, however, GDB doesn't use this value when decoding
.debug_line. Instead, GDB uses the Pointer Size from the compilation
unit.)
readelf is able to seamlessly handle mismatches between these various
sizes by using the size of the DW_LNE_set_address instruction to
determine the address size. Another way to fix this problem is to
make GDB behave in a similar manner. In my opinion, GDB should detect
and inform the user about these mismatches; it's not clear to me if
it's correct for GDB to go ahead and read the address anyway when a
size mismatch is detected.
Without this change, addresses in .debug_line are encoded in two bytes
for some multilibs. When GDB reads the address for
DW_LNE_set_address, it uses the pointer size provided by the CU. When
these values don't match, GDB reads the wrong number of bytes. In the
cases that I've looked at, GDB is reading 4 bytes from a 2 byte
container, which results in a garbage address. GDB discards lines
which have a bogus address; the end result is that GDB records no line
number information for CUs which have a mismatch between the address
size (from the CU) and the format of the address used by
DW_LNE_set_address.
gas/ChangeLog:
* config/tc-msp430.h (DWARF2_ADDR_SIZE): Set to 4.
2016-01-27 19:44:38 +00:00
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#define DWARF2_ADDR_SIZE(bfd) 4
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