binutils-gdb/include/elf/msp430.h
Jozef Lawrynowicz c0ea7c52e1 Add support for new functionality in the msp430 backend of GCC.
This functionality will generate a new GNU object attribute for the "data region"
has been added. This object attribute is used
mark whether the compiler has generated code assuming that data could be in the
upper or lower memory regions.

Code which assumes data is always in the lower memory region is incompatible
with code which uses the full memory range for data.

The patch also adds a new assembler directive ".mspabi_attribute" to handle the
existing MSPABI object attributes. GCC will now emit both .gnu_attribute and
.mspabi_attribute directives to indicate what options the source file was
compiled with.

The assembler will now check the values set in these directives against the
options that the it has been invoked with. If there is a discrepancy, the
assembler will exit with an error.

bfd	* elf32-msp430.c (elf32_msp430_merge_mspabi_attributes): Rename to..
	(elf32_msp430_merge_msp430_attributes): Add support for merging the GNU
	object attribute for data region.

binutils* readelf.c (display_msp430_gnu_attribute): New.
	(process_arch_specific): Use msp430 specific handler for GNU
	attributes.

gas	* config/tc-msp430.c (md_parse_option): Set lower_data_region_only to
	FALSE if the data region is set to "upper", "either" or "none".
	(msp430_object_attribute): New.
	(md_pseudo_table): Handle .mspabi_attribute and .gnu_attribute.
	(msp430_md_end): Replace hard-coded attribute values with enums.
	Handle data region object attribute.
	* doc/as.texi: Document MSP430 Data Region object attribute.
	* doc/c-msp430.texi: Document the .mspabi_attribute directive.
	* testsuite/gas/msp430/attr-430-small-bad.d: New test.
	* testsuite/gas/msp430/attr-430-small-bad.l: New test.
	* testsuite/gas/msp430/attr-430-small-good.d: New test.
	* testsuite/gas/msp430/attr-430-small.s: New test.
	* testsuite/gas/msp430/attr-430x-large-any-bad.d: New test.
	* testsuite/gas/msp430/attr-430x-large-any-bad.l: New test.
	* testsuite/gas/msp430/attr-430x-large-any-good.d: New test.
	* testsuite/gas/msp430/attr-430x-large-any.s: New test.
	* testsuite/gas/msp430/attr-430x-large-lower-bad.d: New test.
	* testsuite/gas/msp430/attr-430x-large-lower-bad.l: New test.
	* testsuite/gas/msp430/attr-430x-large-lower-good.d: New test.
	* testsuite/gas/msp430/attr-430x-large-lower.s: New test.
	* testsuite/gas/msp430/msp430.exp: Run new tests.

include	* elf/msp430.h: Add enums for MSPABI and GNU object attribute tag names
	and values.

ld	* testsuite/ld-msp430-elf/attr-gnu-main.s: New test.
	* testsuite/ld-msp430-elf/attr-gnu-obj.s: New test.
	* testsuite/ld-msp430-elf/attr-gnu-region-lower-upper.d: New test.
	* testsuite/ld-msp430-elf/attr-gnu-region-lower.d: New test.
	* testsuite/ld-msp430-elf/attr-gnu-region-upper.d: New test.
	* testsuite/ld-msp430-elf/msp430-elf.exp: Run new tests.
2019-10-07 16:34:31 +01:00

143 lines
5.5 KiB
C

/* MSP430 ELF support for BFD.
Copyright (C) 2002-2019 Free Software Foundation, Inc.
Contributed by Dmitry Diky <diwil@mail.ru>
This file is part of BFD, the Binary File Descriptor library.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software Foundation,
Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
#ifndef _ELF_MSP430_H
#define _ELF_MSP430_H
#include "elf/reloc-macros.h"
/* Processor specific flags for the ELF header e_flags field. */
#define EF_MSP430_MACH 0xff
#define E_MSP430_MACH_MSP430x11 11
#define E_MSP430_MACH_MSP430x11x1 110
#define E_MSP430_MACH_MSP430x12 12
#define E_MSP430_MACH_MSP430x13 13
#define E_MSP430_MACH_MSP430x14 14
#define E_MSP430_MACH_MSP430x15 15
#define E_MSP430_MACH_MSP430x16 16
#define E_MSP430_MACH_MSP430x20 20
#define E_MSP430_MACH_MSP430x22 22
#define E_MSP430_MACH_MSP430x23 23
#define E_MSP430_MACH_MSP430x24 24
#define E_MSP430_MACH_MSP430x26 26
#define E_MSP430_MACH_MSP430x31 31
#define E_MSP430_MACH_MSP430x32 32
#define E_MSP430_MACH_MSP430x33 33
#define E_MSP430_MACH_MSP430x41 41
#define E_MSP430_MACH_MSP430x42 42
#define E_MSP430_MACH_MSP430x43 43
#define E_MSP430_MACH_MSP430x44 44
#define E_MSP430_MACH_MSP430X 45
#define E_MSP430_MACH_MSP430x46 46
#define E_MSP430_MACH_MSP430x47 47
#define E_MSP430_MACH_MSP430x54 54
#define SHT_MSP430_ATTRIBUTES 0x70000003 /* Section holds ABI attributes. */
#define SHT_MSP430_SEC_FLAGS 0x7f000005 /* Holds TI compiler's section flags. */
#define SHT_MSP430_SYM_ALIASES 0x7f000006 /* Holds TI compiler's symbol aliases. */
/* Tag values for an attribute section. */
#define OFBA_MSPABI_Tag_ISA 4
#define OFBA_MSPABI_Tag_Code_Model 6
#define OFBA_MSPABI_Tag_Data_Model 8
#define OFBA_MSPABI_Tag_enum_size 10 /* Unused by GNU. */
/* GNU Object attribute tags. */
enum
{
/* 0-3 are generic. */
/* Define a GNU attribute for keeping track of whether the compiler has
generated code assuming that the upper region could be in use.
Added by the assembler based on the -mdata-region option.
This tag is ignored unless the large memory model is in use. */
Tag_GNU_MSP430_Data_Region = 4,
};
/* Object attribute values. */
enum
{
/* Values defined for OFBA_MSPABI_Tag_ISA. */
OFBA_MSPABI_Val_ISA_NONE = 0,
OFBA_MSPABI_Val_ISA_MSP430 = 1,
OFBA_MSPABI_Val_ISA_MSP430X = 2,
/* Values defined for OFBA_MSPABI_Tag_Code_Model. */
OFBA_MSPABI_Val_Code_Model_NONE = 0,
OFBA_MSPABI_Val_Code_Model_SMALL = 1,
OFBA_MSPABI_Val_Code_Model_LARGE = 2,
/* Values defined for OFBA_MSPABI_Tag_Data_Model. */
OFBA_MSPABI_Val_Data_Model_NONE = 0,
OFBA_MSPABI_Val_Data_Model_SMALL = 1,
OFBA_MSPABI_Val_Data_Model_LARGE = 2,
OFBA_MSPABI_Val_Data_Model_RESTRICTED = 3, /* Unused by GNU. */
/* Values defined for Tag_GNU_MSP430_Data_Region. */
Val_GNU_MSP430_Data_Region_NONE = 0,
/* The default data region. Assumes all data is below address 0x10000. */
Val_GNU_MSP430_Data_Region_Lower = 1,
/* Set if -mdata-region={none,upper,either}. Assumes
data could be placed at or above address 0x10000. */
Val_GNU_MSP430_Data_Region_Any = 2,
};
/* Relocations. */
START_RELOC_NUMBERS (elf_msp430_reloc_type)
RELOC_NUMBER (R_MSP430_NONE, 0)
RELOC_NUMBER (R_MSP430_32, 1)
RELOC_NUMBER (R_MSP430_10_PCREL, 2)
RELOC_NUMBER (R_MSP430_16, 3)
RELOC_NUMBER (R_MSP430_16_PCREL, 4)
RELOC_NUMBER (R_MSP430_16_BYTE, 5)
RELOC_NUMBER (R_MSP430_16_PCREL_BYTE, 6)
RELOC_NUMBER (R_MSP430_2X_PCREL, 7)
RELOC_NUMBER (R_MSP430_RL_PCREL, 8)
RELOC_NUMBER (R_MSP430_8, 9)
RELOC_NUMBER (R_MSP430_SYM_DIFF, 10)
END_RELOC_NUMBERS (R_MSP430_max)
START_RELOC_NUMBERS (elf_msp430x_reloc_type)
RELOC_NUMBER (R_MSP430_ABS32, 1) /* aka R_MSP430_32 */
RELOC_NUMBER (R_MSP430_ABS16, 2) /* aka R_MSP430_16 */
RELOC_NUMBER (R_MSP430_ABS8, 3)
RELOC_NUMBER (R_MSP430_PCR16, 4) /* aka R_MSP430_16_PCREL */
RELOC_NUMBER (R_MSP430X_PCR20_EXT_SRC, 5)
RELOC_NUMBER (R_MSP430X_PCR20_EXT_DST, 6)
RELOC_NUMBER (R_MSP430X_PCR20_EXT_ODST, 7)
RELOC_NUMBER (R_MSP430X_ABS20_EXT_SRC, 8)
RELOC_NUMBER (R_MSP430X_ABS20_EXT_DST, 9)
RELOC_NUMBER (R_MSP430X_ABS20_EXT_ODST, 10)
RELOC_NUMBER (R_MSP430X_ABS20_ADR_SRC, 11)
RELOC_NUMBER (R_MSP430X_ABS20_ADR_DST, 12)
RELOC_NUMBER (R_MSP430X_PCR16, 13) /* Like R_MSP430_PCR16 but with overflow checking. */
RELOC_NUMBER (R_MSP430X_PCR20_CALL, 14)
RELOC_NUMBER (R_MSP430X_ABS16, 15) /* Like R_MSP430_ABS16 but with overflow checking. */
RELOC_NUMBER (R_MSP430_ABS_HI16, 16)
RELOC_NUMBER (R_MSP430_PREL31, 17)
RELOC_NUMBER (R_MSP430_EHTYPE, 18) /* Mentioned in ABI. */
RELOC_NUMBER (R_MSP430X_10_PCREL, 19) /* Red Hat invention. Used for Jump instructions. */
RELOC_NUMBER (R_MSP430X_2X_PCREL, 20) /* Red Hat invention. Used for relaxing jumps. */
RELOC_NUMBER (R_MSP430X_SYM_DIFF, 21) /* Red Hat invention. Used for relaxing debug info. */
END_RELOC_NUMBERS (R_MSP430x_max)
#endif /* _ELF_MSP430_H */