/* SPDX-License-Identifier: GPL-2.0
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*
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* Copyright (C) 2009 Matt Fleming <matt@console-pimps.org>
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*/
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#ifndef __ASM_SH_DWARF_H
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#define __ASM_SH_DWARF_H
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#ifdef CONFIG_DWARF_UNWINDER
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/*
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* DWARF expression operations
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*/
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#define DW_OP_addr 0x03
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#define DW_OP_deref 0x06
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#define DW_OP_const1u 0x08
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#define DW_OP_const1s 0x09
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#define DW_OP_const2u 0x0a
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#define DW_OP_const2s 0x0b
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#define DW_OP_const4u 0x0c
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#define DW_OP_const4s 0x0d
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#define DW_OP_const8u 0x0e
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#define DW_OP_const8s 0x0f
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#define DW_OP_constu 0x10
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#define DW_OP_consts 0x11
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#define DW_OP_dup 0x12
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#define DW_OP_drop 0x13
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#define DW_OP_over 0x14
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#define DW_OP_pick 0x15
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#define DW_OP_swap 0x16
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#define DW_OP_rot 0x17
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#define DW_OP_xderef 0x18
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#define DW_OP_abs 0x19
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#define DW_OP_and 0x1a
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#define DW_OP_div 0x1b
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#define DW_OP_minus 0x1c
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#define DW_OP_mod 0x1d
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#define DW_OP_mul 0x1e
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#define DW_OP_neg 0x1f
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#define DW_OP_not 0x20
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#define DW_OP_or 0x21
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#define DW_OP_plus 0x22
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#define DW_OP_plus_uconst 0x23
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#define DW_OP_shl 0x24
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#define DW_OP_shr 0x25
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#define DW_OP_shra 0x26
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#define DW_OP_xor 0x27
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#define DW_OP_skip 0x2f
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#define DW_OP_bra 0x28
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#define DW_OP_eq 0x29
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#define DW_OP_ge 0x2a
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#define DW_OP_gt 0x2b
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#define DW_OP_le 0x2c
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#define DW_OP_lt 0x2d
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#define DW_OP_ne 0x2e
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#define DW_OP_lit0 0x30
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#define DW_OP_lit1 0x31
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#define DW_OP_lit2 0x32
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#define DW_OP_lit3 0x33
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#define DW_OP_lit4 0x34
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#define DW_OP_lit5 0x35
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#define DW_OP_lit6 0x36
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#define DW_OP_lit7 0x37
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#define DW_OP_lit8 0x38
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#define DW_OP_lit9 0x39
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#define DW_OP_lit10 0x3a
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#define DW_OP_lit11 0x3b
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#define DW_OP_lit12 0x3c
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#define DW_OP_lit13 0x3d
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#define DW_OP_lit14 0x3e
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#define DW_OP_lit15 0x3f
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#define DW_OP_lit16 0x40
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#define DW_OP_lit17 0x41
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#define DW_OP_lit18 0x42
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#define DW_OP_lit19 0x43
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#define DW_OP_lit20 0x44
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#define DW_OP_lit21 0x45
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#define DW_OP_lit22 0x46
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#define DW_OP_lit23 0x47
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#define DW_OP_lit24 0x48
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#define DW_OP_lit25 0x49
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#define DW_OP_lit26 0x4a
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#define DW_OP_lit27 0x4b
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#define DW_OP_lit28 0x4c
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#define DW_OP_lit29 0x4d
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#define DW_OP_lit30 0x4e
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#define DW_OP_lit31 0x4f
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#define DW_OP_reg0 0x50
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#define DW_OP_reg1 0x51
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#define DW_OP_reg2 0x52
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#define DW_OP_reg3 0x53
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#define DW_OP_reg4 0x54
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#define DW_OP_reg5 0x55
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#define DW_OP_reg6 0x56
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#define DW_OP_reg7 0x57
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#define DW_OP_reg8 0x58
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#define DW_OP_reg9 0x59
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#define DW_OP_reg10 0x5a
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#define DW_OP_reg11 0x5b
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#define DW_OP_reg12 0x5c
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#define DW_OP_reg13 0x5d
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#define DW_OP_reg14 0x5e
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#define DW_OP_reg15 0x5f
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#define DW_OP_reg16 0x60
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#define DW_OP_reg17 0x61
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#define DW_OP_reg18 0x62
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#define DW_OP_reg19 0x63
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#define DW_OP_reg20 0x64
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#define DW_OP_reg21 0x65
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#define DW_OP_reg22 0x66
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#define DW_OP_reg23 0x67
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#define DW_OP_reg24 0x68
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#define DW_OP_reg25 0x69
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#define DW_OP_reg26 0x6a
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#define DW_OP_reg27 0x6b
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#define DW_OP_reg28 0x6c
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#define DW_OP_reg29 0x6d
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#define DW_OP_reg30 0x6e
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#define DW_OP_reg31 0x6f
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#define DW_OP_breg0 0x70
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#define DW_OP_breg1 0x71
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#define DW_OP_breg2 0x72
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#define DW_OP_breg3 0x73
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#define DW_OP_breg4 0x74
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#define DW_OP_breg5 0x75
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#define DW_OP_breg6 0x76
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#define DW_OP_breg7 0x77
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#define DW_OP_breg8 0x78
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#define DW_OP_breg9 0x79
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#define DW_OP_breg10 0x7a
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#define DW_OP_breg11 0x7b
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#define DW_OP_breg12 0x7c
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#define DW_OP_breg13 0x7d
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#define DW_OP_breg14 0x7e
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#define DW_OP_breg15 0x7f
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#define DW_OP_breg16 0x80
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#define DW_OP_breg17 0x81
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#define DW_OP_breg18 0x82
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#define DW_OP_breg19 0x83
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#define DW_OP_breg20 0x84
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#define DW_OP_breg21 0x85
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#define DW_OP_breg22 0x86
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#define DW_OP_breg23 0x87
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#define DW_OP_breg24 0x88
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#define DW_OP_breg25 0x89
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#define DW_OP_breg26 0x8a
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#define DW_OP_breg27 0x8b
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#define DW_OP_breg28 0x8c
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#define DW_OP_breg29 0x8d
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#define DW_OP_breg30 0x8e
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#define DW_OP_breg31 0x8f
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#define DW_OP_regx 0x90
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#define DW_OP_fbreg 0x91
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#define DW_OP_bregx 0x92
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#define DW_OP_piece 0x93
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#define DW_OP_deref_size 0x94
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#define DW_OP_xderef_size 0x95
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#define DW_OP_nop 0x96
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#define DW_OP_push_object_address 0x97
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#define DW_OP_call2 0x98
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#define DW_OP_call4 0x99
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#define DW_OP_call_ref 0x9a
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#define DW_OP_form_tls_address 0x9b
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#define DW_OP_call_frame_cfa 0x9c
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#define DW_OP_bit_piece 0x9d
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#define DW_OP_lo_user 0xe0
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#define DW_OP_hi_user 0xff
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/*
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* Addresses used in FDE entries in the .eh_frame section may be encoded
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* using one of the following encodings.
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*/
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#define DW_EH_PE_absptr 0x00
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#define DW_EH_PE_omit 0xff
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#define DW_EH_PE_uleb128 0x01
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#define DW_EH_PE_udata2 0x02
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#define DW_EH_PE_udata4 0x03
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#define DW_EH_PE_udata8 0x04
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#define DW_EH_PE_sleb128 0x09
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#define DW_EH_PE_sdata2 0x0a
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#define DW_EH_PE_sdata4 0x0b
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#define DW_EH_PE_sdata8 0x0c
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#define DW_EH_PE_signed 0x09
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#define DW_EH_PE_pcrel 0x10
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/*
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* The architecture-specific register number that contains the return
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* address in the .debug_frame table.
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*/
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#define DWARF_ARCH_RA_REG 17
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#ifndef __ASSEMBLY__
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#include <linux/compiler.h>
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#include <linux/bug.h>
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#include <linux/list.h>
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#include <linux/module.h>
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/*
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* Read either the frame pointer (r14) or the stack pointer (r15).
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* NOTE: this MUST be inlined.
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*/
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static __always_inline unsigned long dwarf_read_arch_reg(unsigned int reg)
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{
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unsigned long value = 0;
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switch (reg) {
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case 14:
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__asm__ __volatile__("mov r14, %0\n" : "=r" (value));
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break;
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case 15:
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__asm__ __volatile__("mov r15, %0\n" : "=r" (value));
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break;
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default:
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BUG();
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}
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return value;
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}
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/**
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* dwarf_cie - Common Information Entry
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*/
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struct dwarf_cie {
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unsigned long length;
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unsigned long cie_id;
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unsigned char version;
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const char *augmentation;
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unsigned int code_alignment_factor;
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int data_alignment_factor;
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/* Which column in the rule table represents return addr of func. */
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unsigned int return_address_reg;
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unsigned char *initial_instructions;
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unsigned char *instructions_end;
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unsigned char encoding;
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unsigned long cie_pointer;
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unsigned long flags;
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#define DWARF_CIE_Z_AUGMENTATION (1 << 0)
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/* linked-list entry if this CIE is from a module */
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struct list_head link;
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struct rb_node node;
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};
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/**
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* dwarf_fde - Frame Description Entry
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*/
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struct dwarf_fde {
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unsigned long length;
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unsigned long cie_pointer;
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struct dwarf_cie *cie;
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unsigned long initial_location;
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unsigned long address_range;
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unsigned char *instructions;
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unsigned char *end;
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/* linked-list entry if this FDE is from a module */
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struct list_head link;
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struct rb_node node;
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};
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/**
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* dwarf_frame - DWARF information for a frame in the call stack
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*/
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struct dwarf_frame {
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struct dwarf_frame *prev, *next;
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unsigned long pc;
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struct list_head reg_list;
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unsigned long cfa;
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/* Valid when DW_FRAME_CFA_REG_OFFSET is set in flags */
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unsigned int cfa_register;
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unsigned int cfa_offset;
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/* Valid when DW_FRAME_CFA_REG_EXP is set in flags */
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unsigned char *cfa_expr;
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unsigned int cfa_expr_len;
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unsigned long flags;
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#define DWARF_FRAME_CFA_REG_OFFSET (1 << 0)
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#define DWARF_FRAME_CFA_REG_EXP (1 << 1)
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unsigned long return_addr;
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};
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/**
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* dwarf_reg - DWARF register
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* @flags: Describes how to calculate the value of this register
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*/
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struct dwarf_reg {
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struct list_head link;
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unsigned int number;
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unsigned long addr;
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unsigned long flags;
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#define DWARF_REG_OFFSET (1 << 0)
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#define DWARF_VAL_OFFSET (1 << 1)
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#define DWARF_UNDEFINED (1 << 2)
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};
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/*
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* Call Frame instruction opcodes.
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*/
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#define DW_CFA_advance_loc 0x40
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#define DW_CFA_offset 0x80
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#define DW_CFA_restore 0xc0
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#define DW_CFA_nop 0x00
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#define DW_CFA_set_loc 0x01
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#define DW_CFA_advance_loc1 0x02
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#define DW_CFA_advance_loc2 0x03
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#define DW_CFA_advance_loc4 0x04
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#define DW_CFA_offset_extended 0x05
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#define DW_CFA_restore_extended 0x06
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#define DW_CFA_undefined 0x07
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#define DW_CFA_same_value 0x08
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#define DW_CFA_register 0x09
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#define DW_CFA_remember_state 0x0a
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#define DW_CFA_restore_state 0x0b
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#define DW_CFA_def_cfa 0x0c
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#define DW_CFA_def_cfa_register 0x0d
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#define DW_CFA_def_cfa_offset 0x0e
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#define DW_CFA_def_cfa_expression 0x0f
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#define DW_CFA_expression 0x10
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#define DW_CFA_offset_extended_sf 0x11
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#define DW_CFA_def_cfa_sf 0x12
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#define DW_CFA_def_cfa_offset_sf 0x13
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#define DW_CFA_val_offset 0x14
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#define DW_CFA_val_offset_sf 0x15
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#define DW_CFA_val_expression 0x16
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#define DW_CFA_lo_user 0x1c
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#define DW_CFA_hi_user 0x3f
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/* GNU extension opcodes */
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#define DW_CFA_GNU_args_size 0x2e
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#define DW_CFA_GNU_negative_offset_extended 0x2f
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/*
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* Some call frame instructions encode their operands in the opcode. We
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* need some helper functions to extract both the opcode and operands
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* from an instruction.
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*/
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static inline unsigned int DW_CFA_opcode(unsigned long insn)
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{
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return (insn & 0xc0);
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}
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static inline unsigned int DW_CFA_operand(unsigned long insn)
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{
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return (insn & 0x3f);
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}
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#define DW_EH_FRAME_CIE 0 /* .eh_frame CIE IDs are 0 */
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#define DW_CIE_ID 0xffffffff
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#define DW64_CIE_ID 0xffffffffffffffffULL
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/*
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* DWARF FDE/CIE length field values.
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*/
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#define DW_EXT_LO 0xfffffff0
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#define DW_EXT_HI 0xffffffff
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#define DW_EXT_DWARF64 DW_EXT_HI
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extern struct dwarf_frame *dwarf_unwind_stack(unsigned long,
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struct dwarf_frame *);
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extern void dwarf_free_frame(struct dwarf_frame *);
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extern int module_dwarf_finalize(const Elf_Ehdr *, const Elf_Shdr *,
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struct module *);
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extern void module_dwarf_cleanup(struct module *);
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#endif /* !__ASSEMBLY__ */
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#define CFI_STARTPROC .cfi_startproc
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#define CFI_ENDPROC .cfi_endproc
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#define CFI_DEF_CFA .cfi_def_cfa
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#define CFI_REGISTER .cfi_register
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#define CFI_REL_OFFSET .cfi_rel_offset
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#define CFI_UNDEFINED .cfi_undefined
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#else
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/*
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* Use the asm comment character to ignore the rest of the line.
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*/
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#define CFI_IGNORE !
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#define CFI_STARTPROC CFI_IGNORE
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#define CFI_ENDPROC CFI_IGNORE
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#define CFI_DEF_CFA CFI_IGNORE
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#define CFI_REGISTER CFI_IGNORE
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#define CFI_REL_OFFSET CFI_IGNORE
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#define CFI_UNDEFINED CFI_IGNORE
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#ifndef __ASSEMBLY__
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static inline void dwarf_unwinder_init(void)
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{
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}
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#define module_dwarf_finalize(hdr, sechdrs, me) (0)
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#define module_dwarf_cleanup(mod) do { } while (0)
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#endif
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#endif /* CONFIG_DWARF_UNWINDER */
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#endif /* __ASM_SH_DWARF_H */
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