/* $NetBSD: netbsd32_exec.c,v 1.21 2000/06/28 15:39:31 mrg Exp $ */ /* from: NetBSD: exec_aout.c,v 1.15 1996/09/26 23:34:46 cgd Exp */ /* * Copyright (c) 1998 Matthew R. Green. * Copyright (c) 1993, 1994 Christopher G. Demetriou * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by Christopher G. Demetriou. * 4. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #define ELFSIZE 32 #include "opt_compat_sunos.h" #include "opt_syscall_debug.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include const char netbsd32_emul_path[] = "/emul/netbsd32"; extern char netbsd32_sigcode[], netbsd32_esigcode[]; extern struct sysent netbsd32_sysent[]; #ifdef SYSCALL_DEBUG extern char *netbsd32_syscallnames[]; #endif void *netbsd32_copyargs __P((struct exec_package *, struct ps_strings *, void *, void *)); void *netbsd32_elf32_copyargs __P((struct exec_package *, struct ps_strings *, void *, void *)); int netbsd32_copyinargs __P((struct exec_package *, struct ps_strings *, void *, size_t, const void *, const void *)); static int netbsd32_exec_aout_prep_zmagic __P((struct proc *, struct exec_package *)); static int netbsd32_exec_aout_prep_nmagic __P((struct proc *, struct exec_package *)); static int netbsd32_exec_aout_prep_omagic __P((struct proc *, struct exec_package *)); #ifdef EXEC_AOUT struct emul emul_netbsd32 = { "netbsd32", NULL, netbsd32_sendsig, netbsd32_SYS_syscall, netbsd32_SYS_MAXSYSCALL, netbsd32_sysent, #ifdef SYSCALL_DEBUG netbsd32_syscallnames, #else NULL, #endif 0, netbsd32_copyargs, netbsd32_setregs, netbsd32_sigcode, netbsd32_esigcode, }; #endif /* EXEC_AOUT */ #ifdef EXEC_ELF32 /* Elf emul structure */ struct emul ELFNAMEEND(emul_netbsd32) = { "netbsd32", NULL, netbsd32_sendsig, netbsd32_SYS_syscall, netbsd32_SYS_MAXSYSCALL, netbsd32_sysent, #ifdef SYSCALL_DEBUG netbsd32_syscallnames, #else NULL, #endif howmany(ELF_AUX_ENTRIES * sizeof(AuxInfo), sizeof(Elf_Addr)), netbsd32_elf32_copyargs, netbsd32_setregs, netbsd32_sigcode, netbsd32_esigcode, }; extern int ELFNAME2(netbsd,signature) __P((struct proc *, struct exec_package *, Elf_Ehdr *)); int ELFNAME2(netbsd32,probe)(p, epp, eh, itp, pos) struct proc *p; struct exec_package *epp; Elf_Ehdr *eh; char *itp; Elf_Addr *pos; { int error; size_t i; const char *bp; if ((error = ELFNAME2(netbsd,signature)(p, epp, eh)) != 0) return error; if (itp[0]) { if ((error = emul_find(p, NULL, netbsd32_emul_path, itp, &bp, 0)) && (error = emul_find(p, NULL, "", itp, &bp, 0))) return error; if ((error = copystr(bp, itp, MAXPATHLEN, &i)) != 0) return error; free((void *)bp, M_TEMP); } epp->ep_emul = &ELFNAMEEND(emul_netbsd32); epp->ep_flags |= EXEC_32; *pos = ELFDEFNNAME(NO_ADDR); return 0; } #endif #ifdef EXEC_AOUT /* * exec_netbsd32_makecmds(): Check if it's an netbsd32 a.out format * executable. * * Given a proc pointer and an exec package pointer, see if the referent * of the epp is in netbsd32 a.out format. Check 'standard' magic * numbers for this architecture. * * This function, in the former case, or the hook, in the latter, is * responsible for creating a set of vmcmds which can be used to build * the process's vm space and inserting them into the exec package. */ int exec_netbsd32_makecmds(p, epp) struct proc *p; struct exec_package *epp; { netbsd32_u_long midmag, magic; u_short mid; int error; struct netbsd32_exec *execp = epp->ep_hdr; if (epp->ep_hdrvalid < sizeof(struct netbsd32_exec)) return ENOEXEC; midmag = (netbsd32_u_long)ntohl(execp->a_midmag); mid = (midmag >> 16) & 0x3ff; magic = midmag & 0xffff; midmag = mid << 16 | magic; switch (midmag) { case (MID_SPARC << 16) | ZMAGIC: error = netbsd32_exec_aout_prep_zmagic(p, epp); break; case (MID_SPARC << 16) | NMAGIC: error = netbsd32_exec_aout_prep_nmagic(p, epp); break; case (MID_SPARC << 16) | OMAGIC: error = netbsd32_exec_aout_prep_omagic(p, epp); break; default: /* Invalid magic */ error = ENOEXEC; break; } if (error == 0) { /* set up our emulation information */ epp->ep_emul = &emul_netbsd32; epp->ep_flags |= EXEC_32; } else kill_vmcmds(&epp->ep_vmcmds); return error; } /* * netbsd32_exec_aout_prep_zmagic(): Prepare a 'native' ZMAGIC binary's * exec package * * First, set of the various offsets/lengths in the exec package. * * Then, mark the text image busy (so it can be demand paged) or error * out if this is not possible. Finally, set up vmcmds for the * text, data, bss, and stack segments. */ int netbsd32_exec_aout_prep_zmagic(p, epp) struct proc *p; struct exec_package *epp; { struct netbsd32_exec *execp = epp->ep_hdr; epp->ep_taddr = USRTEXT; epp->ep_tsize = execp->a_text; epp->ep_daddr = epp->ep_taddr + execp->a_text; epp->ep_dsize = execp->a_data + execp->a_bss; epp->ep_entry = execp->a_entry; /* * check if vnode is in open for writing, because we want to * demand-page out of it. if it is, don't do it, for various * reasons */ if ((execp->a_text != 0 || execp->a_data != 0) && epp->ep_vp->v_writecount != 0) { #ifdef DIAGNOSTIC if (epp->ep_vp->v_flag & VTEXT) panic("exec: a VTEXT vnode has writecount != 0\n"); #endif return ETXTBSY; } vn_marktext(epp->ep_vp); /* set up command for text segment */ NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_pagedvn, execp->a_text, epp->ep_taddr, epp->ep_vp, 0, VM_PROT_READ|VM_PROT_EXECUTE); /* set up command for data segment */ NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_pagedvn, execp->a_data, epp->ep_daddr, epp->ep_vp, execp->a_text, VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); /* set up command for bss segment */ NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, execp->a_bss, epp->ep_daddr + execp->a_data, NULLVP, 0, VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); return exec_aout_setup_stack(p, epp); } /* * netbsd32_exec_aout_prep_nmagic(): Prepare a 'native' NMAGIC binary's * exec package */ int netbsd32_exec_aout_prep_nmagic(p, epp) struct proc *p; struct exec_package *epp; { struct netbsd32_exec *execp = epp->ep_hdr; long bsize, baddr; epp->ep_taddr = USRTEXT; epp->ep_tsize = execp->a_text; epp->ep_daddr = roundup(epp->ep_taddr + execp->a_text, __LDPGSZ); epp->ep_dsize = execp->a_data + execp->a_bss; epp->ep_entry = execp->a_entry; /* set up command for text segment */ NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, execp->a_text, epp->ep_taddr, epp->ep_vp, sizeof(struct exec), VM_PROT_READ|VM_PROT_EXECUTE); /* set up command for data segment */ NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, execp->a_data, epp->ep_daddr, epp->ep_vp, execp->a_text + sizeof(struct exec), VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); /* set up command for bss segment */ baddr = roundup(epp->ep_daddr + execp->a_data, NBPG); bsize = epp->ep_daddr + epp->ep_dsize - baddr; if (bsize > 0) NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, bsize, baddr, NULLVP, 0, VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); return exec_aout_setup_stack(p, epp); } /* * netbsd32_exec_aout_prep_omagic(): Prepare a 'native' OMAGIC binary's * exec package */ int netbsd32_exec_aout_prep_omagic(p, epp) struct proc *p; struct exec_package *epp; { struct netbsd32_exec *execp = epp->ep_hdr; long dsize, bsize, baddr; epp->ep_taddr = USRTEXT; epp->ep_tsize = execp->a_text; epp->ep_daddr = epp->ep_taddr + execp->a_text; epp->ep_dsize = execp->a_data + execp->a_bss; epp->ep_entry = execp->a_entry; /* set up command for text and data segments */ NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, execp->a_text + execp->a_data, epp->ep_taddr, epp->ep_vp, sizeof(struct exec), VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); /* set up command for bss segment */ baddr = roundup(epp->ep_daddr + execp->a_data, NBPG); bsize = epp->ep_daddr + epp->ep_dsize - baddr; if (bsize > 0) NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, bsize, baddr, NULLVP, 0, VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE); /* * Make sure (# of pages) mapped above equals (vm_tsize + vm_dsize); * obreak(2) relies on this fact. Both `vm_tsize' and `vm_dsize' are * computed (in execve(2)) by rounding *up* `ep_tsize' and `ep_dsize' * respectively to page boundaries. * Compensate `ep_dsize' for the amount of data covered by the last * text page. */ dsize = epp->ep_dsize + execp->a_text - roundup(execp->a_text, NBPG); epp->ep_dsize = (dsize > 0) ? dsize : 0; return exec_aout_setup_stack(p, epp); } #endif /* * We need to copy out all pointers as 32-bit values. */ void * netbsd32_copyargs(pack, arginfo, stack, argp) struct exec_package *pack; struct ps_strings *arginfo; void *stack; void *argp; { u_int32_t *cpp = stack; u_int32_t dp; u_int32_t nullp = 0; char *sp; size_t len; int argc = arginfo->ps_nargvstr; int envc = arginfo->ps_nenvstr; if (copyout(&argc, cpp++, sizeof(argc))) return NULL; dp = (u_long) (cpp + argc + envc + 2 + pack->ep_emul->e_arglen); sp = argp; /* XXX don't copy them out, remap them! */ arginfo->ps_argvstr = (char **)(u_long)cpp; /* remember location of argv for later */ for (; --argc >= 0; sp += len, dp += len) { if (copyout(&dp, cpp++, sizeof(dp)) || copyoutstr(sp, (char *)(u_long)dp, ARG_MAX, &len)) return NULL; } if (copyout(&nullp, cpp++, sizeof(nullp))) return NULL; arginfo->ps_envstr = (char **)(u_long)cpp; /* remember location of envp for later */ for (; --envc >= 0; sp += len, dp += len) { if (copyout(&dp, cpp++, sizeof(dp)) || copyoutstr(sp, (char *)(u_long)dp, ARG_MAX, &len)) return NULL; } if (copyout(&nullp, cpp++, sizeof(nullp))) return NULL; return cpp; } /* round up and down to page boundaries. */ #define ELF_ROUND(a, b) (((a) + (b) - 1) & ~((b) - 1)) #define ELF_TRUNC(a, b) ((a) & ~((b) - 1)) /* * Copy arguments onto the stack in the normal way, but add some * extra information in case of dynamic binding. */ void * netbsd32_elf32_copyargs(pack, arginfo, stack, argp) struct exec_package *pack; struct ps_strings *arginfo; void *stack; void *argp; { size_t len; AuxInfo ai[ELF_AUX_ENTRIES], *a; struct elf_args *ap; stack = netbsd32_copyargs(pack, arginfo, stack, argp); if (!stack) return NULL; a = ai; /* * Push extra arguments on the stack needed by dynamically * linked binaries */ if ((ap = (struct elf_args *)pack->ep_emul_arg)) { a->a_type = AT_PHDR; a->a_v = ap->arg_phaddr; a++; a->a_type = AT_PHENT; a->a_v = ap->arg_phentsize; a++; a->a_type = AT_PHNUM; a->a_v = ap->arg_phnum; a++; a->a_type = AT_PAGESZ; a->a_v = NBPG; a++; a->a_type = AT_BASE; a->a_v = ap->arg_interp; a++; a->a_type = AT_FLAGS; a->a_v = 0; a++; a->a_type = AT_ENTRY; a->a_v = ap->arg_entry; a++; free((char *)ap, M_TEMP); pack->ep_emul_arg = NULL; } a->a_type = AT_NULL; a->a_v = 0; a++; len = (a - ai) * sizeof(AuxInfo); if (copyout(ai, stack, len)) return NULL; stack = (caddr_t)stack + len; return stack; }