1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * dwarf-regs.c : Mapping of DWARF debug register numbers into register names. 4 * 5 * Written by: Masami Hiramatsu <mhiramat@kernel.org> 6 */ 7 8 #include <stdlib.h> 9 #include <string.h> 10 #include <debug.h> 11 #include <dwarf-regs.h> 12 #include <elf.h> 13 #include <errno.h> 14 #include <linux/kernel.h> 15 16 #ifndef EM_AARCH64 17 #define EM_AARCH64 183 /* ARM 64 bit */ 18 #endif 19 20 #ifndef EM_LOONGARCH 21 #define EM_LOONGARCH 258 /* LoongArch */ 22 #endif 23 24 /* Define const char * {arch}_register_tbl[] */ 25 #define DEFINE_DWARF_REGSTR_TABLE 26 #include "../arch/x86/include/dwarf-regs-table.h" 27 #include "../arch/arm/include/dwarf-regs-table.h" 28 #include "../arch/arm64/include/dwarf-regs-table.h" 29 #include "../arch/sh/include/dwarf-regs-table.h" 30 #include "../arch/powerpc/include/dwarf-regs-table.h" 31 #include "../arch/s390/include/dwarf-regs-table.h" 32 #include "../arch/sparc/include/dwarf-regs-table.h" 33 #include "../arch/xtensa/include/dwarf-regs-table.h" 34 #include "../arch/mips/include/dwarf-regs-table.h" 35 #include "../arch/loongarch/include/dwarf-regs-table.h" 36 37 #define __get_dwarf_regstr(tbl, n) (((n) < ARRAY_SIZE(tbl)) ? (tbl)[(n)] : NULL) 38 39 /* Return architecture dependent register string (for kprobe-tracer) */ 40 const char *get_dwarf_regstr(unsigned int n, unsigned int machine) 41 { 42 switch (machine) { 43 case EM_NONE: /* Generic arch - use host arch */ 44 return get_arch_regstr(n); 45 case EM_386: 46 return __get_dwarf_regstr(x86_32_regstr_tbl, n); 47 case EM_X86_64: 48 return __get_dwarf_regstr(x86_64_regstr_tbl, n); 49 case EM_ARM: 50 return __get_dwarf_regstr(arm_regstr_tbl, n); 51 case EM_AARCH64: 52 return __get_dwarf_regstr(aarch64_regstr_tbl, n); 53 case EM_SH: 54 return __get_dwarf_regstr(sh_regstr_tbl, n); 55 case EM_S390: 56 return __get_dwarf_regstr(s390_regstr_tbl, n); 57 case EM_PPC: 58 case EM_PPC64: 59 return __get_dwarf_regstr(powerpc_regstr_tbl, n); 60 case EM_SPARC: 61 case EM_SPARCV9: 62 return __get_dwarf_regstr(sparc_regstr_tbl, n); 63 case EM_XTENSA: 64 return __get_dwarf_regstr(xtensa_regstr_tbl, n); 65 case EM_MIPS: 66 return __get_dwarf_regstr(mips_regstr_tbl, n); 67 case EM_LOONGARCH: 68 return __get_dwarf_regstr(loongarch_regstr_tbl, n); 69 default: 70 pr_err("ELF MACHINE %x is not supported.\n", machine); 71 } 72 return NULL; 73 } 74 75 __weak int get_arch_regnum(const char *name __maybe_unused) 76 { 77 return -ENOTSUP; 78 } 79 80 /* Return DWARF register number from architecture register name */ 81 int get_dwarf_regnum(const char *name, unsigned int machine) 82 { 83 char *regname = strdup(name); 84 int reg = -1; 85 char *p; 86 87 if (regname == NULL) 88 return -EINVAL; 89 90 /* For convenience, remove trailing characters */ 91 p = strpbrk(regname, " ,)"); 92 if (p) 93 *p = '\0'; 94 95 switch (machine) { 96 case EM_NONE: /* Generic arch - use host arch */ 97 reg = get_arch_regnum(regname); 98 break; 99 default: 100 pr_err("ELF MACHINE %x is not supported.\n", machine); 101 } 102 free(regname); 103 return reg; 104 } 105