| /* |
| * 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 */ |