Annotation of sys/compat/aout/compat_aout.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: compat_aout.c,v 1.2 2003/08/23 19:28:53 tedu Exp $ */
! 2:
! 3: /*
! 4: * Copyright (c) 2003 Marc Espie
! 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. The name of the author may not be used to endorse or promote products
! 13: * derived from this software without specific prior written permission
! 14: *
! 15: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
! 16: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
! 17: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
! 18: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
! 19: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
! 20: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
! 21: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
! 22: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
! 23: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
! 24: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
! 25: *
! 26: */
! 27: #include <sys/param.h>
! 28: #include <sys/syscall.h>
! 29: #include <sys/signalvar.h>
! 30: #include <sys/mount.h>
! 31: #include <sys/syscallargs.h>
! 32: #include <sys/fcntl.h>
! 33: #include <compat/common/compat_util.h>
! 34:
! 35: void aout_compat_setup(struct exec_package *epp);
! 36:
! 37: extern char sigcode[], esigcode[];
! 38:
! 39: struct sysent aout_sysent[SYS_MAXSYSCALL];
! 40:
! 41: struct emul emul_aout = {
! 42: "aout",
! 43: NULL,
! 44: sendsig,
! 45: SYS_syscall,
! 46: SYS_MAXSYSCALL,
! 47: NULL,
! 48: #ifdef SYSCALL_DEBUG
! 49: syscallnames,
! 50: #else
! 51: NULL,
! 52: #endif
! 53: 0,
! 54: copyargs,
! 55: setregs,
! 56: NULL,
! 57: sigcode,
! 58: esigcode,
! 59: };
! 60:
! 61: #ifdef syscallarg
! 62: #undef syscallarg
! 63: #endif
! 64:
! 65: #define syscallarg(x) \
! 66: union { \
! 67: register_t pad; \
! 68: struct { x datum; } le; \
! 69: struct { \
! 70: int8_t pad[ (sizeof (register_t) < sizeof (x)) \
! 71: ? 0 \
! 72: : sizeof (register_t) - sizeof (x)]; \
! 73: x datum; \
! 74: } be; \
! 75: }
! 76:
! 77:
! 78: struct aout_sys_open_args {
! 79: syscallarg(char *) path;
! 80: syscallarg(int) flags;
! 81: syscallarg(int) mode;
! 82: };
! 83:
! 84: struct aout_sys_link_args {
! 85: syscallarg(char *) path;
! 86: syscallarg(char *) link;
! 87: };
! 88:
! 89: struct aout_sys_unlink_args {
! 90: syscallarg(char *) path;
! 91: };
! 92:
! 93: struct aout_sys_rename_args {
! 94: syscallarg(char *) from;
! 95: syscallarg(char *) to;
! 96: };
! 97:
! 98: int aout_sys_open(struct proc *, void *, register_t *);
! 99: int aout_sys_link(struct proc *, void *, register_t *);
! 100: int aout_sys_unlink(struct proc *, void *, register_t *);
! 101: int aout_sys_rename(struct proc *, void *, register_t *);
! 102:
! 103: const char aout_path[] = "/emul/a.out";
! 104:
! 105: #define AOUT_CHECK_ALT_EXIST(p, sgp, path) \
! 106: CHECK_ALT_EXIST(p, sgp, aout_path, path)
! 107:
! 108: #define AOUT_CHECK_ALT_CREAT(p, sgp, path) \
! 109: CHECK_ALT_CREAT(p, sgp, aout_path, path)
! 110:
! 111: /* XXX We just translate enough calls to allow ldconfig and ld.so to work. */
! 112:
! 113: void
! 114: aout_compat_setup(struct exec_package *epp)
! 115: {
! 116: if (emul_aout.e_sysent == NULL) {
! 117: memcpy(aout_sysent, sysent, sizeof aout_sysent);
! 118: aout_sysent[SYS_open].sy_call = aout_sys_open;
! 119: aout_sysent[SYS_link].sy_call = aout_sys_link;
! 120: aout_sysent[SYS_unlink].sy_call = aout_sys_unlink;
! 121: aout_sysent[SYS_rename].sy_call = aout_sys_rename;
! 122: emul_aout.e_sysent = aout_sysent;
! 123: }
! 124: epp->ep_emul = &emul_aout;
! 125: }
! 126:
! 127: int
! 128: aout_sys_open(p, v, retval)
! 129: struct proc *p;
! 130: void *v;
! 131: register_t *retval;
! 132: {
! 133: struct aout_sys_open_args /* {
! 134: syscallarg(char *) path;
! 135: syscallarg(int) flags;
! 136: syscallarg(int) mode;
! 137: } */ *uap = v;
! 138: caddr_t sg = stackgap_init(p->p_emul);
! 139:
! 140: if (SCARG(uap, flags) & O_CREAT)
! 141: AOUT_CHECK_ALT_CREAT(p, &sg, SCARG(uap, path));
! 142: else
! 143: AOUT_CHECK_ALT_EXIST(p, &sg, SCARG(uap, path));
! 144: return sys_open(p, uap, retval);
! 145: }
! 146:
! 147: int
! 148: aout_sys_link(p, v, retval)
! 149: struct proc *p;
! 150: void *v;
! 151: register_t *retval;
! 152: {
! 153: struct aout_sys_link_args /* {
! 154: syscallarg(char *) path;
! 155: syscallarg(char *) link;
! 156: } */ *uap = v;
! 157: caddr_t sg = stackgap_init(p->p_emul);
! 158:
! 159: AOUT_CHECK_ALT_EXIST(p, &sg, SCARG(uap, path));
! 160: AOUT_CHECK_ALT_CREAT(p, &sg, SCARG(uap, link));
! 161: return sys_link(p, uap, retval);
! 162: }
! 163:
! 164: int
! 165: aout_sys_unlink(p, v, retval)
! 166: struct proc *p;
! 167: void *v;
! 168: register_t *retval;
! 169: {
! 170: struct aout_sys_unlink_args /* {
! 171: syscallarg(char *) path;
! 172: } */ *uap = v;
! 173: caddr_t sg = stackgap_init(p->p_emul);
! 174:
! 175: AOUT_CHECK_ALT_EXIST(p, &sg, SCARG(uap, path));
! 176: return sys_unlink(p, uap, retval);
! 177: }
! 178:
! 179:
! 180: int
! 181: aout_sys_rename(p, v, retval)
! 182: struct proc *p;
! 183: void *v;
! 184: register_t *retval;
! 185: {
! 186: struct aout_sys_rename_args /* {
! 187: syscallarg(char *) from;
! 188: syscallarg(char *) to;
! 189: } */ *uap = v;
! 190: caddr_t sg = stackgap_init(p->p_emul);
! 191:
! 192: AOUT_CHECK_ALT_EXIST(p, &sg, SCARG(uap, from));
! 193: AOUT_CHECK_ALT_CREAT(p, &sg, SCARG(uap, to));
! 194: return sys_rename(p, uap, retval);
! 195: }
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