| /* Xtensa ELF support for BFD. |
| Copyright (C) 2003-2020 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" |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| /* 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 |
| |
| extern asection *xtensa_make_property_section (asection *, const char *); |
| extern int |
| xtensa_read_table_entries (bfd *abfd, |
| asection *section, |
| property_table_entry **table_p, |
| const char *sec_name, |
| bfd_boolean output_addr); |
| extern int |
| xtensa_compute_fill_extra_space (property_table_entry *entry); |
| |
| #ifdef __cplusplus |
| } |
| #endif |
| |
| #endif /* _ELF_XTENSA_H */ |
