1 /* $NetBSD: sunos_exec_aout.c,v 1.19 2015/10/18 16:59:19 maxv Exp $ */ 2 3 /* 4 * Copyright (c) 1993 Theo de Raadt 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. The name of the author may not be used to endorse or promote products 16 * derived from this software without specific prior written permission 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 */ 29 30 #include <sys/cdefs.h> 31 __KERNEL_RCSID(0, "$NetBSD: sunos_exec_aout.c,v 1.19 2015/10/18 16:59:19 maxv Exp $"); 32 33 #include <sys/param.h> 34 #include <sys/systm.h> 35 #include <sys/filedesc.h> 36 #include <sys/kernel.h> 37 #include <sys/proc.h> 38 #include <sys/mount.h> 39 #include <sys/malloc.h> 40 #include <sys/namei.h> 41 #include <sys/signalvar.h> 42 #include <sys/vnode.h> 43 #include <sys/file.h> 44 #include <sys/exec.h> 45 #include <sys/exec_aout.h> 46 #include <sys/resourcevar.h> 47 #include <sys/wait.h> 48 49 #include <sys/mman.h> 50 51 #include <sys/cpu.h> 52 #include <machine/reg.h> 53 54 #include <compat/sunos/sunos.h> 55 #include <compat/sunos/sunos_exec.h> 56 #include <compat/sunos/sunos_syscall.h> 57 58 #ifdef __sparc__ 59 #define sunos_exec_aout_prep_zmagic exec_aout_prep_zmagic 60 #define sunos_exec_aout_prep_nmagic exec_aout_prep_nmagic 61 #define sunos_exec_aout_prep_omagic exec_aout_prep_omagic 62 #endif 63 64 int sunos_exec_aout_prep_zmagic(struct lwp *, struct exec_package *); 65 int sunos_exec_aout_prep_nmagic(struct lwp *, struct exec_package *); 66 int sunos_exec_aout_prep_omagic(struct lwp *, struct exec_package *); 67 68 int 69 exec_sunos_aout_makecmds(struct lwp *l, struct exec_package *epp) 70 { 71 struct sunos_exec *sunmag = epp->ep_hdr; 72 int error = ENOEXEC; 73 74 if (epp->ep_hdrvalid < sizeof(struct sunos_exec)) 75 return ENOEXEC; 76 if (!SUNOS_M_NATIVE(sunmag->a_machtype)) 77 return (ENOEXEC); 78 79 switch (sunmag->a_magic) { 80 case ZMAGIC: 81 error = sunos_exec_aout_prep_zmagic(l, epp); 82 break; 83 case NMAGIC: 84 error = sunos_exec_aout_prep_nmagic(l, epp); 85 break; 86 case OMAGIC: 87 error = sunos_exec_aout_prep_omagic(l, epp); 88 break; 89 } 90 return error; 91 } 92 93 /* 94 * the code below is only needed for sun2/sun3 emulation. 95 */ 96 #ifndef __sparc__ 97 98 /* suns keep data seg aligned to SEGSIZ because of sun custom mmu */ 99 #define SEGSIZ 0x20000 100 #define SUNOS_N_TXTADDR(x,m) 0x2000 101 #define SUNOS_N_DATADDR(x,m) (((m)==OMAGIC) ? \ 102 (SUNOS_N_TXTADDR(x,m) + (x).a_text) : \ 103 (SEGSIZ + ((SUNOS_N_TXTADDR(x,m) + (x).a_text - 1) & ~(SEGSIZ-1)))) 104 #define SUNOS_N_BSSADDR(x,m) (SUNOS_N_DATADDR(x,m)+(x).a_data) 105 106 #define SUNOS_N_TXTOFF(x,m) ((m)==ZMAGIC ? 0 : sizeof (struct exec)) 107 #define SUNOS_N_DATOFF(x,m) (SUNOS_N_TXTOFF(x,m) + (x).a_text) 108 109 /* 110 * sunos_exec_aout_prep_zmagic(): Prepare a SunOS ZMAGIC binary's exec package 111 * 112 * First, set of the various offsets/lengths in the exec package. 113 * 114 * Then, mark the text image busy (so it can be demand paged) or error 115 * out if this is not possible. Finally, set up vmcmds for the 116 * text, data, bss, and stack segments. 117 */ 118 int 119 sunos_exec_aout_prep_zmagic(struct lwp *l, struct exec_package *epp) 120 { 121 struct exec *execp = epp->ep_hdr; 122 int error; 123 124 epp->ep_taddr = SUNOS_N_TXTADDR(*execp, ZMAGIC); 125 epp->ep_tsize = execp->a_text; 126 epp->ep_daddr = SUNOS_N_DATADDR(*execp, ZMAGIC); 127 epp->ep_dsize = execp->a_data + execp->a_bss; 128 epp->ep_entry = execp->a_entry; 129 130 error = vn_marktext(epp->ep_vp); 131 if (error) 132 return (error); 133 134 /* set up command for text segment */ 135 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_pagedvn, execp->a_text, 136 epp->ep_taddr, epp->ep_vp, SUNOS_N_TXTOFF(*execp, ZMAGIC), 137 VM_PROT_READ|VM_PROT_EXECUTE); 138 139 /* set up command for data segment */ 140 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_pagedvn, execp->a_data, 141 epp->ep_daddr, epp->ep_vp, SUNOS_N_DATOFF(*execp, ZMAGIC), 142 VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); 143 144 /* set up command for bss segment */ 145 if (execp->a_bss) 146 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, execp->a_bss, 147 epp->ep_daddr + execp->a_data, NULLVP, 0, 148 VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); 149 150 return (*epp->ep_esch->es_setup_stack)(l, epp); 151 } 152 153 /* 154 * sunos_exec_aout_prep_nmagic(): Prepare a SunOS NMAGIC binary's exec package 155 */ 156 int 157 sunos_exec_aout_prep_nmagic(struct lwp *l, struct exec_package *epp) 158 { 159 struct exec *execp = epp->ep_hdr; 160 long bsize, baddr; 161 162 epp->ep_taddr = SUNOS_N_TXTADDR(*execp, NMAGIC); 163 epp->ep_tsize = execp->a_text; 164 epp->ep_daddr = SUNOS_N_DATADDR(*execp, NMAGIC); 165 epp->ep_dsize = execp->a_data + execp->a_bss; 166 epp->ep_entry = execp->a_entry; 167 168 /* set up command for text segment */ 169 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, execp->a_text, 170 epp->ep_taddr, epp->ep_vp, SUNOS_N_TXTOFF(*execp, NMAGIC), 171 VM_PROT_READ|VM_PROT_EXECUTE); 172 173 /* set up command for data segment */ 174 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, execp->a_data, 175 epp->ep_daddr, epp->ep_vp, SUNOS_N_DATOFF(*execp, NMAGIC), 176 VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); 177 178 /* set up command for bss segment */ 179 baddr = roundup(epp->ep_daddr + execp->a_data, PAGE_SIZE); 180 bsize = epp->ep_daddr + epp->ep_dsize - baddr; 181 if (bsize > 0) 182 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, bsize, baddr, 183 NULLVP, 0, VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); 184 185 return (*epp->ep_esch->es_setup_stack)(l, epp); 186 } 187 188 /* 189 * sunos_exec_aout_prep_omagic(): Prepare a SunOS OMAGIC binary's exec package 190 */ 191 int 192 sunos_exec_aout_prep_omagic(struct lwp *l, struct exec_package *epp) 193 { 194 struct exec *execp = epp->ep_hdr; 195 long bsize, baddr; 196 197 epp->ep_taddr = SUNOS_N_TXTADDR(*execp, OMAGIC); 198 epp->ep_tsize = execp->a_text; 199 epp->ep_daddr = SUNOS_N_DATADDR(*execp, OMAGIC); 200 epp->ep_dsize = execp->a_data + execp->a_bss; 201 epp->ep_entry = execp->a_entry; 202 203 /* set up command for text and data segments */ 204 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, 205 execp->a_text + execp->a_data, epp->ep_taddr, epp->ep_vp, 206 SUNOS_N_TXTOFF(*execp, OMAGIC), VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); 207 208 /* set up command for bss segment */ 209 baddr = roundup(epp->ep_daddr + execp->a_data, PAGE_SIZE); 210 bsize = epp->ep_daddr + epp->ep_dsize - baddr; 211 if (bsize > 0) 212 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, bsize, baddr, 213 NULLVP, 0, VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); 214 215 return (*epp->ep_esch->es_setup_stack)(l, epp); 216 } 217 #endif /* !sparc */ 218
Indexes created Sat Sep 20 22:09:52 GMT 2025