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This is good enough to be able to run a RELENG_4 gdb binary against a RELENG_4 application, along with various other tools (eg: 4.x gcore). We use this at work. ia32_reg.[ch]: handle the 32 bit register file format, used by ptrace, procfs and core dumps. procfs_*regs.c: vary the format of proc/XXX/*regs depending on the client and target application. procfs_map.c: Don't print a 64 bit value to 32 bit consumers, or their sscanf fails. They expect an unsigned long. imgact_elf.c: produce a valid 32 bit coredump for 32 bit apps. sys_process.c: handle 32 bit consumers debugging 32 bit targets. Note that 64 bit consumers can still debug 32 bit targets. IA64 has got stubs for ia32_reg.c. Known limitations: a 5.x/6.x gdb uses get/setcontext(), which isn't implemented in the 32/64 wrapper yet. We also make a tiny patch to gdb pacify it over conflicting formats of ld-elf.so.1. Approved by: re
142 lines
4.2 KiB
C
142 lines
4.2 KiB
C
/*-
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* Copyright (c) 1990 The Regents of the University of California.
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* William Jolitz.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: @(#)reg.h 5.5 (Berkeley) 1/18/91
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* $FreeBSD$
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*/
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#ifndef _COMPAT_IA32_IA32_REG_H_
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#define _COMPAT_IA32_IA32_REG_H_
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/*
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* Register set accessible via /proc/$pid/regs and PT_{SET,GET}REGS.
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*/
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struct reg32 {
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unsigned int r_fs;
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unsigned int r_es;
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unsigned int r_ds;
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unsigned int r_edi;
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unsigned int r_esi;
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unsigned int r_ebp;
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unsigned int r_isp;
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unsigned int r_ebx;
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unsigned int r_edx;
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unsigned int r_ecx;
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unsigned int r_eax;
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unsigned int r_trapno;
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unsigned int r_err;
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unsigned int r_eip;
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unsigned int r_cs;
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unsigned int r_eflags;
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unsigned int r_esp;
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unsigned int r_ss;
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unsigned int r_gs;
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};
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/*
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* Register set accessible via /proc/$pid/fpregs.
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*/
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struct fpreg32 {
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unsigned int fpr_env[7];
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unsigned char fpr_acc[8][10];
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unsigned int fpr_ex_sw;
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unsigned char fpr_pad[64];
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};
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/*
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* Register set accessible via /proc/$pid/dbregs.
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*/
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struct dbreg32 {
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unsigned int dr[8]; /* debug registers */
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};
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/* Environment information of floating point unit */
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struct env87 {
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int en_cw; /* control word (16bits) */
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int en_sw; /* status word (16bits) */
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int en_tw; /* tag word (16bits) */
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int en_fip; /* floating point instruction pointer */
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u_short en_fcs; /* floating code segment selector */
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u_short en_opcode; /* opcode last executed (11 bits ) */
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int en_foo; /* floating operand offset */
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int en_fos; /* floating operand segment selector */
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};
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#ifdef __ia64__
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/* Layout of an x87 fpu register (amd64 gets this elsewhere) */
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struct fpacc87 {
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u_char fp_bytes[10];
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};
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#endif
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/* Floating point context */
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struct save87 {
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struct env87 sv_env; /* floating point control/status */
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struct fpacc87 sv_ac[8]; /* accumulator contents, 0-7 */
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u_char sv_pad0[4]; /* padding for (now unused) saved status word */
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u_char sv_pad[64]; /* padding; used by emulators */
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};
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/*
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* Alternative layouts for <sys/procfs.h>
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* Used in core dumps, the reason for this file existing.
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*/
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struct prstatus32 {
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int pr_version;
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u_int pr_statussz;
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u_int pr_gregsetsz;
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u_int pr_fpregsetsz;
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int pr_osreldate;
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int pr_cursig;
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pid_t pr_pid;
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struct reg32 pr_reg;
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};
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struct prpsinfo32 {
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int pr_version;
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u_int pr_psinfosz;
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char pr_fname[PRFNAMESZ+1];
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char pr_psargs[PRARGSZ+1];
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};
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/*
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* Wrappers and converters.
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*/
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int fill_regs32(struct thread *, struct reg32 *);
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int set_regs32(struct thread *, struct reg32 *);
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int fill_fpregs32(struct thread *, struct fpreg32 *);
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int set_fpregs32(struct thread *, struct fpreg32 *);
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int fill_dbregs32(struct thread *, struct dbreg32 *);
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int set_dbregs32(struct thread *, struct dbreg32 *);
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#endif /* !_COMPAT_IA32_IA32_REG_H_ */
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