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Diffstat (limited to 'binutils-2.25/include/elf/xtensa.h')
| -rw-r--r-- | binutils-2.25/include/elf/xtensa.h | 208 |
1 files changed, 208 insertions, 0 deletions
diff --git a/binutils-2.25/include/elf/xtensa.h b/binutils-2.25/include/elf/xtensa.h new file mode 100644 index 00000000..0d35f7ab --- /dev/null +++ b/binutils-2.25/include/elf/xtensa.h @@ -0,0 +1,208 @@ +/* Xtensa ELF support for BFD. + Copyright 2003, 2004, 2007, 2008, 2010 Free Software Foundation, Inc. + Contributed by Bob Wilson (bwilson@tensilica.com) at Tensilica. + + 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. */ + +/* This file holds definitions specific to the Xtensa ELF ABI. */ + +#ifndef _ELF_XTENSA_H +#define _ELF_XTENSA_H + +#include "elf/reloc-macros.h" + +/* Relocations. */ +START_RELOC_NUMBERS (elf_xtensa_reloc_type) + RELOC_NUMBER (R_XTENSA_NONE, 0) + RELOC_NUMBER (R_XTENSA_32, 1) + RELOC_NUMBER (R_XTENSA_RTLD, 2) + RELOC_NUMBER (R_XTENSA_GLOB_DAT, 3) + RELOC_NUMBER (R_XTENSA_JMP_SLOT, 4) + RELOC_NUMBER (R_XTENSA_RELATIVE, 5) + RELOC_NUMBER (R_XTENSA_PLT, 6) + RELOC_NUMBER (R_XTENSA_OP0, 8) + RELOC_NUMBER (R_XTENSA_OP1, 9) + RELOC_NUMBER (R_XTENSA_OP2, 10) + RELOC_NUMBER (R_XTENSA_ASM_EXPAND, 11) + RELOC_NUMBER (R_XTENSA_ASM_SIMPLIFY, 12) + RELOC_NUMBER (R_XTENSA_32_PCREL, 14) + RELOC_NUMBER (R_XTENSA_GNU_VTINHERIT, 15) + RELOC_NUMBER (R_XTENSA_GNU_VTENTRY, 16) + RELOC_NUMBER (R_XTENSA_DIFF8, 17) + RELOC_NUMBER (R_XTENSA_DIFF16, 18) + RELOC_NUMBER (R_XTENSA_DIFF32, 19) + RELOC_NUMBER (R_XTENSA_SLOT0_OP, 20) + RELOC_NUMBER (R_XTENSA_SLOT1_OP, 21) + RELOC_NUMBER (R_XTENSA_SLOT2_OP, 22) + RELOC_NUMBER (R_XTENSA_SLOT3_OP, 23) + RELOC_NUMBER (R_XTENSA_SLOT4_OP, 24) + RELOC_NUMBER (R_XTENSA_SLOT5_OP, 25) + RELOC_NUMBER (R_XTENSA_SLOT6_OP, 26) + RELOC_NUMBER (R_XTENSA_SLOT7_OP, 27) + RELOC_NUMBER (R_XTENSA_SLOT8_OP, 28) + RELOC_NUMBER (R_XTENSA_SLOT9_OP, 29) + RELOC_NUMBER (R_XTENSA_SLOT10_OP, 30) + RELOC_NUMBER (R_XTENSA_SLOT11_OP, 31) + RELOC_NUMBER (R_XTENSA_SLOT12_OP, 32) + RELOC_NUMBER (R_XTENSA_SLOT13_OP, 33) + RELOC_NUMBER (R_XTENSA_SLOT14_OP, 34) + RELOC_NUMBER (R_XTENSA_SLOT0_ALT, 35) + RELOC_NUMBER (R_XTENSA_SLOT1_ALT, 36) + RELOC_NUMBER (R_XTENSA_SLOT2_ALT, 37) + RELOC_NUMBER (R_XTENSA_SLOT3_ALT, 38) + RELOC_NUMBER (R_XTENSA_SLOT4_ALT, 39) + RELOC_NUMBER (R_XTENSA_SLOT5_ALT, 40) + RELOC_NUMBER (R_XTENSA_SLOT6_ALT, 41) + RELOC_NUMBER (R_XTENSA_SLOT7_ALT, 42) + RELOC_NUMBER (R_XTENSA_SLOT8_ALT, 43) + RELOC_NUMBER (R_XTENSA_SLOT9_ALT, 44) + RELOC_NUMBER (R_XTENSA_SLOT10_ALT, 45) + RELOC_NUMBER (R_XTENSA_SLOT11_ALT, 46) + RELOC_NUMBER (R_XTENSA_SLOT12_ALT, 47) + RELOC_NUMBER (R_XTENSA_SLOT13_ALT, 48) + RELOC_NUMBER (R_XTENSA_SLOT14_ALT, 49) + RELOC_NUMBER (R_XTENSA_TLSDESC_FN, 50) + RELOC_NUMBER (R_XTENSA_TLSDESC_ARG, 51) + RELOC_NUMBER (R_XTENSA_TLS_DTPOFF, 52) + RELOC_NUMBER (R_XTENSA_TLS_TPOFF, 53) + RELOC_NUMBER (R_XTENSA_TLS_FUNC, 54) + RELOC_NUMBER (R_XTENSA_TLS_ARG, 55) + RELOC_NUMBER (R_XTENSA_TLS_CALL, 56) +END_RELOC_NUMBERS (R_XTENSA_max) + +/* Processor-specific flags for the ELF header e_flags field. */ + +/* Four-bit Xtensa machine type field. */ +#define EF_XTENSA_MACH 0x0000000f + +/* Various CPU types. */ +#define E_XTENSA_MACH 0x00000000 + +/* Leave bits 0xf0 alone in case we ever have more than 16 cpu types. + Highly unlikely, but what the heck. */ + +#define EF_XTENSA_XT_INSN 0x00000100 +#define EF_XTENSA_XT_LIT 0x00000200 + + +/* Processor-specific dynamic array tags. */ + +/* Offset of the table that records the GOT location(s). */ +#define DT_XTENSA_GOT_LOC_OFF 0x70000000 + +/* Number of entries in the GOT location table. */ +#define DT_XTENSA_GOT_LOC_SZ 0x70000001 + + +/* Definitions for instruction and literal property tables. The + tables for ".gnu.linkonce.*" sections are placed in the following + sections: + + instruction tables: .gnu.linkonce.x.* + literal tables: .gnu.linkonce.p.* +*/ + +#define XTENSA_INSN_SEC_NAME ".xt.insn" +#define XTENSA_LIT_SEC_NAME ".xt.lit" +#define XTENSA_PROP_SEC_NAME ".xt.prop" + +typedef struct property_table_entry_t +{ + bfd_vma address; + bfd_vma size; + flagword flags; +} property_table_entry; + +/* Flags in the property tables to specify whether blocks of memory are + literals, instructions, data, or unreachable. For instructions, + blocks that begin loop targets and branch targets are designated. + Blocks that do not allow density instructions, instruction reordering + or transformation are also specified. Finally, for branch targets, + branch target alignment priority is included. Alignment of the next + block is specified in the current block and the size of the current + block does not include any fill required to align to the next + block. */ + +#define XTENSA_PROP_LITERAL 0x00000001 +#define XTENSA_PROP_INSN 0x00000002 +#define XTENSA_PROP_DATA 0x00000004 +#define XTENSA_PROP_UNREACHABLE 0x00000008 +/* Instruction-only properties at beginning of code. */ +#define XTENSA_PROP_INSN_LOOP_TARGET 0x00000010 +#define XTENSA_PROP_INSN_BRANCH_TARGET 0x00000020 +/* Instruction-only properties about code. */ +#define XTENSA_PROP_INSN_NO_DENSITY 0x00000040 +#define XTENSA_PROP_INSN_NO_REORDER 0x00000080 +/* Historically, NO_TRANSFORM was a property of instructions, + but it should apply to literals under certain circumstances. */ +#define XTENSA_PROP_NO_TRANSFORM 0x00000100 + +/* Branch target alignment information. This transmits information + to the linker optimization about the priority of aligning a + particular block for branch target alignment: None, low priority, + high priority, or required. These only need to be checked in + instruction blocks marked as XTENSA_PROP_INSN_BRANCH_TARGET. + Common usage is: + + switch (GET_XTENSA_PROP_BT_ALIGN(flags)) + case XTENSA_PROP_BT_ALIGN_NONE: + case XTENSA_PROP_BT_ALIGN_LOW: + case XTENSA_PROP_BT_ALIGN_HIGH: + case XTENSA_PROP_BT_ALIGN_REQUIRE: +*/ +#define XTENSA_PROP_BT_ALIGN_MASK 0x00000600 + +/* No branch target alignment. */ +#define XTENSA_PROP_BT_ALIGN_NONE 0x0 +/* Low priority branch target alignment. */ +#define XTENSA_PROP_BT_ALIGN_LOW 0x1 +/* High priority branch target alignment. */ +#define XTENSA_PROP_BT_ALIGN_HIGH 0x2 +/* Required branch target alignment. */ +#define XTENSA_PROP_BT_ALIGN_REQUIRE 0x3 + +#define GET_XTENSA_PROP_BT_ALIGN(flag) \ + (((unsigned)((flag) & (XTENSA_PROP_BT_ALIGN_MASK))) >> 9) +#define SET_XTENSA_PROP_BT_ALIGN(flag, align) \ + (((flag) & (~XTENSA_PROP_BT_ALIGN_MASK)) | \ + (((align) << 9) & XTENSA_PROP_BT_ALIGN_MASK)) + +/* Alignment is specified in the block BEFORE the one that needs + alignment. Up to 5 bits. Use GET_XTENSA_PROP_ALIGNMENT(flags) to + get the required alignment specified as a power of 2. Use + SET_XTENSA_PROP_ALIGNMENT(flags, pow2) to set the required + alignment. Be careful of side effects since the SET will evaluate + flags twice. Also, note that the SIZE of a block in the property + table does not include the alignment size, so the alignment fill + must be calculated to determine if two blocks are contiguous. + TEXT_ALIGN is not currently implemented but is a placeholder for a + possible future implementation. */ + +#define XTENSA_PROP_ALIGN 0x00000800 + +#define XTENSA_PROP_ALIGNMENT_MASK 0x0001f000 + +#define GET_XTENSA_PROP_ALIGNMENT(flag) \ + (((unsigned)((flag) & (XTENSA_PROP_ALIGNMENT_MASK))) >> 12) +#define SET_XTENSA_PROP_ALIGNMENT(flag, align) \ + (((flag) & (~XTENSA_PROP_ALIGNMENT_MASK)) | \ + (((align) << 12) & XTENSA_PROP_ALIGNMENT_MASK)) + +#define XTENSA_PROP_INSN_ABSLIT 0x00020000 + +#endif /* _ELF_XTENSA_H */ |