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