sunos_exec_aout.c revision 1.17
1 /* $NetBSD: sunos_exec_aout.c,v 1.17 2007/12/08 18:36:23 dsl 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 1.17 2007/12/08 18:36:23 dsl 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/resourcevar.h> 46 #include <sys/wait.h> 47 48 #include <sys/mman.h> 49 50 #include <sys/cpu.h> 51 #include <machine/reg.h> 52 53 #include <compat/sunos/sunos.h> 54 #include <compat/sunos/sunos_exec.h> 55 #include <compat/sunos/sunos_syscall.h> 56 57 #ifdef __sparc__ 58 #define sunos_exec_aout_prep_zmagic exec_aout_prep_zmagic 59 #define sunos_exec_aout_prep_nmagic exec_aout_prep_nmagic 60 #define sunos_exec_aout_prep_omagic exec_aout_prep_omagic 61 #endif 62 63 int sunos_exec_aout_prep_zmagic(struct lwp *, struct exec_package *); 64 int sunos_exec_aout_prep_nmagic(struct lwp *, struct exec_package *); 65 int sunos_exec_aout_prep_omagic(struct lwp *, struct exec_package *); 66 67 int 68 exec_sunos_aout_makecmds(struct lwp *l, struct exec_package *epp) 69 { 70 struct sunos_exec *sunmag = epp->ep_hdr; 71 int error = ENOEXEC; 72 73 if (!SUNOS_M_NATIVE(sunmag->a_machtype)) 74 return (ENOEXEC); 75 76 switch (sunmag->a_magic) { 77 case ZMAGIC: 78 error = sunos_exec_aout_prep_zmagic(l, epp); 79 break; 80 case NMAGIC: 81 error = sunos_exec_aout_prep_nmagic(l, epp); 82 break; 83 case OMAGIC: 84 error = sunos_exec_aout_prep_omagic(l, epp); 85 break; 86 } 87 return error; 88 } 89 90 /* 91 * the code below is only needed for sun2/sun3 emulation. 92 */ 93 #ifndef __sparc__ 94 95 /* suns keep data seg aligned to SEGSIZ because of sun custom mmu */ 96 #define SEGSIZ 0x20000 97 #define SUNOS_N_TXTADDR(x,m) 0x2000 98 #define SUNOS_N_DATADDR(x,m) (((m)==OMAGIC) ? \ 99 (SUNOS_N_TXTADDR(x,m) + (x).a_text) : \ 100 (SEGSIZ + ((SUNOS_N_TXTADDR(x,m) + (x).a_text - 1) & ~(SEGSIZ-1)))) 101 #define SUNOS_N_BSSADDR(x,m) (SUNOS_N_DATADDR(x,m)+(x).a_data) 102 103 #define SUNOS_N_TXTOFF(x,m) ((m)==ZMAGIC ? 0 : sizeof (struct exec)) 104 #define SUNOS_N_DATOFF(x,m) (SUNOS_N_TXTOFF(x,m) + (x).a_text) 105 106 /* 107 * sunos_exec_aout_prep_zmagic(): Prepare a SunOS ZMAGIC binary's exec package 108 * 109 * First, set of the various offsets/lengths in the exec package. 110 * 111 * Then, mark the text image busy (so it can be demand paged) or error 112 * out if this is not possible. Finally, set up vmcmds for the 113 * text, data, bss, and stack segments. 114 */ 115 int 116 sunos_exec_aout_prep_zmagic(struct lwp *l, struct exec_package *epp) 117 { 118 struct exec *execp = epp->ep_hdr; 119 int error; 120 121 epp->ep_taddr = SUNOS_N_TXTADDR(*execp, ZMAGIC); 122 epp->ep_tsize = execp->a_text; 123 epp->ep_daddr = SUNOS_N_DATADDR(*execp, ZMAGIC); 124 epp->ep_dsize = execp->a_data + execp->a_bss; 125 epp->ep_entry = execp->a_entry; 126 127 error = vn_marktext(epp->ep_vp); 128 if (error) 129 return (error); 130 131 /* set up command for text segment */ 132 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_pagedvn, execp->a_text, 133 epp->ep_taddr, epp->ep_vp, SUNOS_N_TXTOFF(*execp, ZMAGIC), 134 VM_PROT_READ|VM_PROT_EXECUTE); 135 136 /* set up command for data segment */ 137 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_pagedvn, execp->a_data, 138 epp->ep_daddr, epp->ep_vp, SUNOS_N_DATOFF(*execp, ZMAGIC), 139 VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); 140 141 /* set up command for bss segment */ 142 if (execp->a_bss) 143 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, execp->a_bss, 144 epp->ep_daddr + execp->a_data, NULLVP, 0, 145 VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); 146 147 return (*epp->ep_esch->es_setup_stack)(l, epp); 148 } 149 150 /* 151 * sunos_exec_aout_prep_nmagic(): Prepare a SunOS NMAGIC binary's exec package 152 */ 153 int 154 sunos_exec_aout_prep_nmagic(struct lwp *l, struct exec_package *epp) 155 { 156 struct exec *execp = epp->ep_hdr; 157 long bsize, baddr; 158 159 epp->ep_taddr = SUNOS_N_TXTADDR(*execp, NMAGIC); 160 epp->ep_tsize = execp->a_text; 161 epp->ep_daddr = SUNOS_N_DATADDR(*execp, NMAGIC); 162 epp->ep_dsize = execp->a_data + execp->a_bss; 163 epp->ep_entry = execp->a_entry; 164 165 /* set up command for text segment */ 166 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, execp->a_text, 167 epp->ep_taddr, epp->ep_vp, SUNOS_N_TXTOFF(*execp, NMAGIC), 168 VM_PROT_READ|VM_PROT_EXECUTE); 169 170 /* set up command for data segment */ 171 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, execp->a_data, 172 epp->ep_daddr, epp->ep_vp, SUNOS_N_DATOFF(*execp, NMAGIC), 173 VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); 174 175 /* set up command for bss segment */ 176 baddr = roundup(epp->ep_daddr + execp->a_data, PAGE_SIZE); 177 bsize = epp->ep_daddr + epp->ep_dsize - baddr; 178 if (bsize > 0) 179 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, bsize, baddr, 180 NULLVP, 0, VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); 181 182 return (*epp->ep_esch->es_setup_stack)(l, epp); 183 } 184 185 /* 186 * sunos_exec_aout_prep_omagic(): Prepare a SunOS OMAGIC binary's exec package 187 */ 188 int 189 sunos_exec_aout_prep_omagic(struct lwp *l, struct exec_package *epp) 190 { 191 struct exec *execp = epp->ep_hdr; 192 long bsize, baddr; 193 194 epp->ep_taddr = SUNOS_N_TXTADDR(*execp, OMAGIC); 195 epp->ep_tsize = execp->a_text; 196 epp->ep_daddr = SUNOS_N_DATADDR(*execp, OMAGIC); 197 epp->ep_dsize = execp->a_data + execp->a_bss; 198 epp->ep_entry = execp->a_entry; 199 200 /* set up command for text and data segments */ 201 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, 202 execp->a_text + execp->a_data, epp->ep_taddr, epp->ep_vp, 203 SUNOS_N_TXTOFF(*execp, OMAGIC), VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); 204 205 /* set up command for bss segment */ 206 baddr = roundup(epp->ep_daddr + execp->a_data, PAGE_SIZE); 207 bsize = epp->ep_daddr + epp->ep_dsize - baddr; 208 if (bsize > 0) 209 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, bsize, baddr, 210 NULLVP, 0, VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); 211 212 return (*epp->ep_esch->es_setup_stack)(l, epp); 213 } 214 #endif /* !sparc */ 215
Indexes created Tue Sep 23 23:09:58 GMT 2025