1/* 2 * Copyright 1997 Sean Eric Fagan 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 3. All advertising materials mentioning features or use of this software 13 * must display the following acknowledgement: 14 * This product includes software developed by Sean Eric Fagan 15 * 4. Neither the name of the author may be used to endorse or promote 16 * products derived from this software without specific prior written 17 * permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32#include <sys/cdefs.h> 33__FBSDID("$FreeBSD$"); 34 35/* FreeBSD/ia64-specific system call handling. */ 36 37#include <sys/ptrace.h> 38#include <sys/syscall.h> 39 40#include <machine/reg.h> 41 42#include <stdio.h> 43 44#include "truss.h" 45 46#include "syscalls.h" 47 48static int 49ia64_fetch_args(struct trussinfo *trussinfo, u_int narg) 50{ 51 struct reg regs; 52 struct current_syscall *cs; 53 unsigned long *parm_offset; 54 lwpid_t tid; 55 int i; 56 57 tid = trussinfo->curthread->tid; 58 cs = &trussinfo->curthread->cs; 59 if (ptrace(PT_GETREGS, tid, (caddr_t)®s, 0) < 0) { 60 fprintf(trussinfo->outfile, "-- CANNOT READ REGISTERS --\n"); 61 return; 62 } 63 parm_offset = ®s.r_scratch.gr16; 64 65 /* 66 * FreeBSD has two special kinds of system call redirections -- 67 * SYS_syscall, and SYS___syscall. The former is the old syscall() 68 * routine, basically; the latter is for quad-aligned arguments. 69 * 70 * The system call argument count and code from ptrace() already 71 * account for these, but we need to skip over %rax if it contains 72 * either of these values. 73 */ 74 switch (regs.r_scratch.gr15) { 75 case SYS_syscall: 76 case SYS___syscall: 77 parm_offset++; 78 break; 79 } 80 81 memcpy(cs->args, parm_offset, narg * sizeof(long)); 82 83 return (0); 84} 85 86static int 87ia64_fetch_retval(struct trussinfo *trussinfo, long *retval, int *errorp) 88{ 89 struct reg regs; 90 lwpid_t tid; 91 92 tid = trussinfo->curthread->tid; 93 if (ptrace(PT_GETREGS, tid, (caddr_t)®s, 0) < 0) { 94 fprintf(trussinfo->outfile, "-- CANNOT READ REGISTERS --\n"); 95 return (-1); 96 } 97 98 retval[0] = regs.r_scratch.gr8; 99 retval[1] = regs.r_scratch.gr9; 100 *errorp = (regs.r_scratch.gr10 != 0) ? 1 : 0; 101 return (0); 102} 103 104static struct procabi ia64_fbsd = { 105 "FreeBSD ELF64", 106 syscallnames, 107 nitems(syscallnames), 108 ia64_fetch_args, 109 ia64_fetch_retval 110}; 111 112PROCABI(ia64_fbsd); 113