Annotation of sys/compat/sunos/sunos_exec.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: sunos_exec.c,v 1.18 2005/12/30 19:46:55 miod Exp $ */
! 2: /* $NetBSD: sunos_exec.c,v 1.11 1996/05/05 12:01:47 briggs Exp $ */
! 3:
! 4: /*
! 5: * Copyright (c) 1993 Theo de Raadt
! 6: * All rights reserved.
! 7: *
! 8: * Redistribution and use in source and binary forms, with or without
! 9: * modification, are permitted provided that the following conditions
! 10: * are met:
! 11: * 1. Redistributions of source code must retain the above copyright
! 12: * notice, this list of conditions and the following disclaimer.
! 13: * 2. Redistributions in binary form must reproduce the above copyright
! 14: * notice, this list of conditions and the following disclaimer in the
! 15: * documentation and/or other materials provided with the distribution.
! 16: *
! 17: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
! 18: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
! 19: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
! 20: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
! 21: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
! 22: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
! 23: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
! 24: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
! 25: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
! 26: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
! 27: */
! 28:
! 29: #include <sys/param.h>
! 30: #include <sys/systm.h>
! 31: #include <sys/filedesc.h>
! 32: #include <sys/kernel.h>
! 33: #include <sys/proc.h>
! 34: #include <sys/mount.h>
! 35: #include <sys/malloc.h>
! 36: #include <sys/namei.h>
! 37: #include <sys/signalvar.h>
! 38: #include <sys/vnode.h>
! 39: #include <sys/file.h>
! 40: #include <sys/exec.h>
! 41: #include <sys/resourcevar.h>
! 42: #include <sys/wait.h>
! 43:
! 44: #include <sys/mman.h>
! 45: #include <uvm/uvm_extern.h>
! 46:
! 47: #include <machine/cpu.h>
! 48: #include <machine/reg.h>
! 49: #include <machine/exec.h>
! 50:
! 51: #include <compat/sunos/sunos.h>
! 52: #include <compat/sunos/sunos_exec.h>
! 53: #include <compat/sunos/sunos_syscall.h>
! 54:
! 55: #ifdef __sparc__
! 56: #define sunos_exec_aout_prep_zmagic exec_aout_prep_zmagic
! 57: #define sunos_exec_aout_prep_nmagic exec_aout_prep_nmagic
! 58: #define sunos_exec_aout_prep_omagic exec_aout_prep_omagic
! 59: #endif
! 60:
! 61: int sunos_exec_aout_makecmds(struct proc *, struct exec_package *);
! 62: int sunos_exec_aout_prep_zmagic(struct proc *, struct exec_package *);
! 63: int sunos_exec_aout_prep_nmagic(struct proc *, struct exec_package *);
! 64: int sunos_exec_aout_prep_omagic(struct proc *, struct exec_package *);
! 65:
! 66: extern int nsunos_sysent;
! 67: extern struct sysent sunos_sysent[];
! 68: #ifdef SYSCALL_DEBUG
! 69: extern char *sunos_syscallnames[];
! 70: #endif
! 71: extern char sigcode[], esigcode[];
! 72: const char sunos_emul_path[] = "/emul/sunos";
! 73:
! 74: struct emul emul_sunos = {
! 75: "sunos",
! 76: NULL,
! 77: #ifdef __sparc__
! 78: sendsig,
! 79: #else
! 80: sunos_sendsig,
! 81: #endif
! 82: SUNOS_SYS_syscall,
! 83: SUNOS_SYS_MAXSYSCALL,
! 84: sunos_sysent,
! 85: #ifdef SYSCALL_DEBUG
! 86: sunos_syscallnames,
! 87: #else
! 88: NULL,
! 89: #endif
! 90: 0,
! 91: copyargs,
! 92: setregs,
! 93: NULL,
! 94: sigcode,
! 95: esigcode,
! 96: };
! 97:
! 98: int
! 99: sunos_exec_aout_makecmds(p, epp)
! 100: struct proc *p;
! 101: struct exec_package *epp;
! 102: {
! 103: struct sunos_exec *sunmag = epp->ep_hdr;
! 104: int error = ENOEXEC;
! 105:
! 106: if (epp->ep_hdrvalid < sizeof(struct sunos_exec))
! 107: return (ENOEXEC);
! 108:
! 109: if(sunmag->a_machtype != SUNOS_M_NATIVE)
! 110: return (ENOEXEC);
! 111:
! 112: switch (sunmag->a_magic) {
! 113: case ZMAGIC:
! 114: error = sunos_exec_aout_prep_zmagic(p, epp);
! 115: break;
! 116: case NMAGIC:
! 117: error = sunos_exec_aout_prep_nmagic(p, epp);
! 118: break;
! 119: case OMAGIC:
! 120: error = sunos_exec_aout_prep_omagic(p, epp);
! 121: break;
! 122: }
! 123: if (error==0)
! 124: epp->ep_emul = &emul_sunos;
! 125: return error;
! 126: }
! 127:
! 128: /*
! 129: * the code below is only needed for sun3 emulation.
! 130: */
! 131: #ifndef __sparc__
! 132:
! 133: /* suns keep data seg aligned to SEGSIZ because of sun custom mmu */
! 134: #define SEGSIZ 0x20000
! 135: #define SUNOS_N_TXTADDR(x,m) __LDPGSZ
! 136: #define SUNOS_N_DATADDR(x,m) (((m)==OMAGIC) ? \
! 137: (SUNOS_N_TXTADDR(x,m) + (x).a_text) : \
! 138: (SEGSIZ + ((SUNOS_N_TXTADDR(x,m) + (x).a_text - 1) & ~(SEGSIZ-1))))
! 139: #define SUNOS_N_BSSADDR(x,m) (SUNOS_N_DATADDR(x,m)+(x).a_data)
! 140:
! 141: #define SUNOS_N_TXTOFF(x,m) ((m)==ZMAGIC ? 0 : sizeof (struct exec))
! 142: #define SUNOS_N_DATOFF(x,m) (SUNOS_N_TXTOFF(x,m) + (x).a_text)
! 143:
! 144: /*
! 145: * sunos_exec_aout_prep_zmagic(): Prepare a SunOS ZMAGIC binary's exec package
! 146: *
! 147: * First, set of the various offsets/lengths in the exec package.
! 148: *
! 149: * Then, mark the text image busy (so it can be demand paged) or error
! 150: * out if this is not possible. Finally, set up vmcmds for the
! 151: * text, data, bss, and stack segments.
! 152: */
! 153: int
! 154: sunos_exec_aout_prep_zmagic(p, epp)
! 155: struct proc *p;
! 156: struct exec_package *epp;
! 157: {
! 158: struct exec *execp = epp->ep_hdr;
! 159:
! 160: epp->ep_taddr = SUNOS_N_TXTADDR(*execp, ZMAGIC);
! 161: epp->ep_tsize = execp->a_text;
! 162: epp->ep_daddr = SUNOS_N_DATADDR(*execp, ZMAGIC);
! 163: epp->ep_dsize = execp->a_data + execp->a_bss;
! 164: epp->ep_entry = execp->a_entry;
! 165:
! 166: /*
! 167: * check if vnode is in open for writing, because we want to
! 168: * demand-page out of it. if it is, don't do it, for various
! 169: * reasons
! 170: */
! 171: if ((execp->a_text != 0 || execp->a_data != 0) &&
! 172: epp->ep_vp->v_writecount != 0) {
! 173: #ifdef DIAGNOSTIC
! 174: if (epp->ep_vp->v_flag & VTEXT)
! 175: panic("exec: a VTEXT vnode has writecount != 0");
! 176: #endif
! 177: return ETXTBSY;
! 178: }
! 179: vn_marktext(epp->ep_vp);
! 180:
! 181: /* set up command for text segment */
! 182: NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_pagedvn, execp->a_text,
! 183: epp->ep_taddr, epp->ep_vp, SUNOS_N_TXTOFF(*execp, ZMAGIC),
! 184: VM_PROT_READ|VM_PROT_EXECUTE);
! 185:
! 186: /* set up command for data segment */
! 187: NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_pagedvn, execp->a_data,
! 188: epp->ep_daddr, epp->ep_vp, SUNOS_N_DATOFF(*execp, ZMAGIC),
! 189: VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
! 190:
! 191: /* set up command for bss segment */
! 192: NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, execp->a_bss,
! 193: epp->ep_daddr + execp->a_data, NULLVP, 0,
! 194: VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
! 195:
! 196: return exec_setup_stack(p, epp);
! 197: }
! 198:
! 199: /*
! 200: * sunos_exec_aout_prep_nmagic(): Prepare a SunOS NMAGIC binary's exec package
! 201: */
! 202: int
! 203: sunos_exec_aout_prep_nmagic(p, epp)
! 204: struct proc *p;
! 205: struct exec_package *epp;
! 206: {
! 207: struct exec *execp = epp->ep_hdr;
! 208: long bsize, baddr;
! 209:
! 210: epp->ep_taddr = SUNOS_N_TXTADDR(*execp, NMAGIC);
! 211: epp->ep_tsize = execp->a_text;
! 212: epp->ep_daddr = SUNOS_N_DATADDR(*execp, NMAGIC);
! 213: epp->ep_dsize = execp->a_data + execp->a_bss;
! 214: epp->ep_entry = execp->a_entry;
! 215:
! 216: /* set up command for text segment */
! 217: NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, execp->a_text,
! 218: epp->ep_taddr, epp->ep_vp, SUNOS_N_TXTOFF(*execp, NMAGIC),
! 219: VM_PROT_READ|VM_PROT_EXECUTE);
! 220:
! 221: /* set up command for data segment */
! 222: NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, execp->a_data,
! 223: epp->ep_daddr, epp->ep_vp, SUNOS_N_DATOFF(*execp, NMAGIC),
! 224: VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
! 225:
! 226: /* set up command for bss segment */
! 227: baddr = round_page(epp->ep_daddr + execp->a_data);
! 228: bsize = epp->ep_daddr + epp->ep_dsize - baddr;
! 229: if (bsize > 0)
! 230: NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, bsize, baddr,
! 231: NULLVP, 0, VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
! 232:
! 233: return exec_setup_stack(p, epp);
! 234: }
! 235:
! 236: /*
! 237: * sunos_exec_aout_prep_omagic(): Prepare a SunOS OMAGIC binary's exec package
! 238: */
! 239: int
! 240: sunos_exec_aout_prep_omagic(p, epp)
! 241: struct proc *p;
! 242: struct exec_package *epp;
! 243: {
! 244: struct exec *execp = epp->ep_hdr;
! 245: long bsize, baddr;
! 246:
! 247: epp->ep_taddr = SUNOS_N_TXTADDR(*execp, OMAGIC);
! 248: epp->ep_tsize = execp->a_text;
! 249: epp->ep_daddr = SUNOS_N_DATADDR(*execp, OMAGIC);
! 250: epp->ep_dsize = execp->a_data + execp->a_bss;
! 251: epp->ep_entry = execp->a_entry;
! 252:
! 253: /* set up command for text and data segments */
! 254: NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn,
! 255: execp->a_text + execp->a_data, epp->ep_taddr, epp->ep_vp,
! 256: SUNOS_N_TXTOFF(*execp, OMAGIC), VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
! 257:
! 258: /* set up command for bss segment */
! 259: baddr = round_page(epp->ep_daddr + execp->a_data);
! 260: bsize = epp->ep_daddr + epp->ep_dsize - baddr;
! 261: if (bsize > 0)
! 262: NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, bsize, baddr,
! 263: NULLVP, 0, VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
! 264:
! 265: return exec_setup_stack(p, epp);
! 266: }
! 267: #endif /* !__sparc__ */
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