diff options
Diffstat (limited to 'tools/perf/arch/x86/util/dwarf-regs.c')
| -rw-r--r-- | tools/perf/arch/x86/util/dwarf-regs.c | 129 |
1 files changed, 0 insertions, 129 deletions
diff --git a/tools/perf/arch/x86/util/dwarf-regs.c b/tools/perf/arch/x86/util/dwarf-regs.c deleted file mode 100644 index 1f86ee8fb831..000000000000 --- a/tools/perf/arch/x86/util/dwarf-regs.c +++ /dev/null @@ -1,129 +0,0 @@ -/* - * dwarf-regs.c : Mapping of DWARF debug register numbers into register names. - * Extracted from probe-finder.c - * - * Written by Masami Hiramatsu <mhiramat@redhat.com> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. - * - */ - -#include <stddef.h> -#include <errno.h> /* for EINVAL */ -#include <string.h> /* for strcmp */ -#include <linux/ptrace.h> /* for struct pt_regs */ -#include <linux/kernel.h> /* for offsetof */ -#include <dwarf-regs.h> - -/* - * See arch/x86/kernel/ptrace.c. - * Different from it: - * - * - Since struct pt_regs is defined differently for user and kernel, - * but we want to use 'ax, bx' instead of 'rax, rbx' (which is struct - * field name of user's pt_regs), we make REG_OFFSET_NAME to accept - * both string name and reg field name. - * - * - Since accessing x86_32's pt_regs from x86_64 building is difficult - * and vise versa, we simply fill offset with -1, so - * get_arch_regstr() still works but regs_query_register_offset() - * returns error. - * The only inconvenience caused by it now is that we are not allowed - * to generate BPF prologue for a x86_64 kernel if perf is built for - * x86_32. This is really a rare usecase. - * - * - Order is different from kernel's ptrace.c for get_arch_regstr(). Use - * the order defined by dwarf. - */ - -struct pt_regs_offset { - const char *name; - int offset; -}; - -#define REG_OFFSET_END {.name = NULL, .offset = 0} - -#ifdef __x86_64__ -# define REG_OFFSET_NAME_64(n, r) {.name = n, .offset = offsetof(struct pt_regs, r)} -# define REG_OFFSET_NAME_32(n, r) {.name = n, .offset = -1} -#else -# define REG_OFFSET_NAME_64(n, r) {.name = n, .offset = -1} -# define REG_OFFSET_NAME_32(n, r) {.name = n, .offset = offsetof(struct pt_regs, r)} -#endif - -/* TODO: switching by dwarf address size */ -#ifndef __x86_64__ -static const struct pt_regs_offset x86_32_regoffset_table[] = { - REG_OFFSET_NAME_32("%ax", eax), - REG_OFFSET_NAME_32("%cx", ecx), - REG_OFFSET_NAME_32("%dx", edx), - REG_OFFSET_NAME_32("%bx", ebx), - REG_OFFSET_NAME_32("$stack", esp), /* Stack address instead of %sp */ - REG_OFFSET_NAME_32("%bp", ebp), - REG_OFFSET_NAME_32("%si", esi), - REG_OFFSET_NAME_32("%di", edi), - REG_OFFSET_END, -}; - -#define regoffset_table x86_32_regoffset_table -#else -static const struct pt_regs_offset x86_64_regoffset_table[] = { - REG_OFFSET_NAME_64("%ax", rax), - REG_OFFSET_NAME_64("%dx", rdx), - REG_OFFSET_NAME_64("%cx", rcx), - REG_OFFSET_NAME_64("%bx", rbx), - REG_OFFSET_NAME_64("%si", rsi), - REG_OFFSET_NAME_64("%di", rdi), - REG_OFFSET_NAME_64("%bp", rbp), - REG_OFFSET_NAME_64("%sp", rsp), - REG_OFFSET_NAME_64("%r8", r8), - REG_OFFSET_NAME_64("%r9", r9), - REG_OFFSET_NAME_64("%r10", r10), - REG_OFFSET_NAME_64("%r11", r11), - REG_OFFSET_NAME_64("%r12", r12), - REG_OFFSET_NAME_64("%r13", r13), - REG_OFFSET_NAME_64("%r14", r14), - REG_OFFSET_NAME_64("%r15", r15), - REG_OFFSET_END, -}; - -#define regoffset_table x86_64_regoffset_table -#endif - -/* Minus 1 for the ending REG_OFFSET_END */ -#define ARCH_MAX_REGS ((sizeof(regoffset_table) / sizeof(regoffset_table[0])) - 1) - -/* Return architecture dependent register string (for kprobe-tracer) */ -const char *get_arch_regstr(unsigned int n) -{ - return (n < ARCH_MAX_REGS) ? regoffset_table[n].name : NULL; -} - -/* Reuse code from arch/x86/kernel/ptrace.c */ -/** - * regs_query_register_offset() - query register offset from its name - * @name: the name of a register - * - * regs_query_register_offset() returns the offset of a register in struct - * pt_regs from its name. If the name is invalid, this returns -EINVAL; - */ -int regs_query_register_offset(const char *name) -{ - const struct pt_regs_offset *roff; - for (roff = regoffset_table; roff->name != NULL; roff++) - if (!strcmp(roff->name, name)) - return roff->offset; - return -EINVAL; -} |