| /* | |
| * 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 */ |