1 /* 2 * Copyright (c) 2014-2015 Dmitry V. Levin <ldv (at) altlinux.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. The name of the author may not be used to endorse or promote products 14 * derived from this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #include "defs.h" 29 30 #include "xlat/kexec_load_flags.h" 31 #include "xlat/kexec_arch_values.h" 32 33 #ifndef KEXEC_ARCH_MASK 34 # define KEXEC_ARCH_MASK 0xffff0000 35 #endif 36 #ifndef KEXEC_SEGMENT_MAX 37 # define KEXEC_SEGMENT_MAX 16 38 #endif 39 40 static bool 41 print_seg(struct tcb *tcp, void *elem_buf, size_t elem_size, void *data) 42 { 43 const kernel_ulong_t *seg; 44 kernel_ulong_t seg_buf[4]; 45 46 if (elem_size < sizeof(seg_buf)) { 47 unsigned int i; 48 49 for (i = 0; i < ARRAY_SIZE(seg_buf); ++i) 50 seg_buf[i] = ((unsigned int *) elem_buf)[i]; 51 seg = seg_buf; 52 } else { 53 seg = elem_buf; 54 } 55 56 tprints("{buf="); 57 printaddr(seg[0]); 58 tprintf(", bufsz=%" PRI_klu ", mem=", seg[1]); 59 printaddr(seg[2]); 60 tprintf(", memsz=%" PRI_klu "}", seg[3]); 61 62 return true; 63 } 64 65 static void 66 print_kexec_segments(struct tcb *const tcp, const kernel_ulong_t addr, 67 const kernel_ulong_t len) 68 { 69 if (len > KEXEC_SEGMENT_MAX) { 70 printaddr(addr); 71 return; 72 } 73 74 kernel_ulong_t seg[4]; 75 const size_t sizeof_seg = ARRAY_SIZE(seg) * current_wordsize; 76 77 print_array(tcp, addr, len, seg, sizeof_seg, 78 umoven_or_printaddr, print_seg, 0); 79 } 80 81 SYS_FUNC(kexec_load) 82 { 83 /* entry, nr_segments */ 84 printaddr(tcp->u_arg[0]); 85 tprintf(", %" PRI_klu ", ", tcp->u_arg[1]); 86 87 /* segments */ 88 print_kexec_segments(tcp, tcp->u_arg[2], tcp->u_arg[1]); 89 tprints(", "); 90 91 /* flags */ 92 kernel_ulong_t n = tcp->u_arg[3]; 93 printxval64(kexec_arch_values, n & KEXEC_ARCH_MASK, "KEXEC_ARCH_???"); 94 n &= ~(kernel_ulong_t) KEXEC_ARCH_MASK; 95 if (n) { 96 tprints("|"); 97 printflags64(kexec_load_flags, n, "KEXEC_???"); 98 } 99 100 return RVAL_DECODED; 101 } 102 103 #include "xlat/kexec_file_load_flags.h" 104 105 SYS_FUNC(kexec_file_load) 106 { 107 /* kernel_fd */ 108 printfd(tcp, tcp->u_arg[0]); 109 tprints(", "); 110 /* initrd_fd */ 111 printfd(tcp, tcp->u_arg[1]); 112 tprints(", "); 113 /* cmdline_len */ 114 tprintf("%" PRI_klu ", ", tcp->u_arg[2]); 115 /* cmdline */ 116 printstrn(tcp, tcp->u_arg[3], tcp->u_arg[2]); 117 tprints(", "); 118 /* flags */ 119 printflags64(kexec_file_load_flags, tcp->u_arg[4], "KEXEC_FILE_???"); 120 121 return RVAL_DECODED; 122 } 123
