diff options
Diffstat (limited to 'sys/ia64/ia32/imgact_ia32.c')
| -rw-r--r-- | sys/ia64/ia32/imgact_ia32.c | 1446 |
1 files changed, 0 insertions, 1446 deletions
diff --git a/sys/ia64/ia32/imgact_ia32.c b/sys/ia64/ia32/imgact_ia32.c deleted file mode 100644 index 3230e6a..0000000 --- a/sys/ia64/ia32/imgact_ia32.c +++ /dev/null @@ -1,1446 +0,0 @@ -/*- - * Copyright (c) 2000 David O'Brien - * Copyright (c) 1995-1996 Søren Schmidt - * Copyright (c) 1996 Peter Wemm - * 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 - * in this position and unchanged. - * 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. 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. - * - * $FreeBSD$ - */ - -#include <sys/param.h> -#include <sys/exec.h> -#include <sys/fcntl.h> -#include <sys/imgact.h> -#include <sys/kernel.h> -#include <sys/lock.h> -#include <sys/malloc.h> -#include <sys/mutex.h> -#include <sys/mman.h> -#include <sys/namei.h> -#include <sys/pioctl.h> -#include <sys/proc.h> -#include <sys/procfs.h> -#include <sys/resourcevar.h> -#include <sys/systm.h> -#include <sys/signalvar.h> -#include <sys/stat.h> -#include <sys/sx.h> -#include <sys/syscall.h> -#include <sys/sysctl.h> -#include <sys/sysent.h> -#include <sys/vnode.h> - -#include <vm/vm.h> -#include <vm/vm_kern.h> -#include <vm/vm_param.h> -#include <vm/pmap.h> -#include <vm/vm_map.h> -#include <vm/vm_object.h> -#include <vm/vm_extern.h> - -#include <ia64/ia32/imgact_ia32.h> -#include <i386/include/psl.h> -#include <i386/include/segments.h> -#include <i386/include/specialreg.h> -#include <machine/md_var.h> - -#define OLD_EI_BRAND 8 - -__ElfType(Brandinfo); -__ElfType(Auxargs); - -#define IA32_USRSTACK (3L*1024*1024*1024) -#define IA32_PS_STRINGS (IA32_USRSTACK - sizeof(struct ia32_ps_strings)) - -static int elf32_check_header(const Elf32_Ehdr *hdr); -static int elf32_freebsd_fixup(register_t **stack_base, - struct image_params *imgp); -static int elf32_load_file(struct proc *p, const char *file, u_long *addr, - u_long *entry); -static int elf32_load_section(struct proc *p, - struct vmspace *vmspace, struct vnode *vp, - vm_offset_t offset, caddr_t vmaddr, size_t memsz, size_t filsz, - vm_prot_t prot); -static int exec_elf32_imgact(struct image_params *imgp); -static int elf32_coredump(struct thread *td, struct vnode *vp, off_t limit); -static register_t *elf32_copyout_strings(struct image_params *imgp); -static void elf32_setregs(struct thread *td, u_long entry, u_long stack, - u_long ps_strings); - -static int elf32_trace = 0; -SYSCTL_INT(_debug, OID_AUTO, elf32_trace, CTLFLAG_RW, &elf32_trace, 0, ""); - -extern struct sysent ia32_sysent[]; - -static char ia32_sigcode[] = { - 0xff, 0x54, 0x24, 0x10, /* call *SIGF_HANDLER(%esp) */ - 0x8d, 0x44, 0x24, 0x14, /* lea SIGF_UC(%esp),%eax */ - 0x50, /* pushl %eax */ - 0xf7, 0x40, 0x54, 0x00, 0x00, 0x02, 0x02, /* testl $PSL_VM,UC_EFLAGS(%eax) */ - 0x75, 0x03, /* jne 9f */ - 0x8e, 0x68, 0x14, /* movl UC_GS(%eax),%gs */ - 0xb8, 0x57, 0x01, 0x00, 0x00, /* 9: movl $SYS_sigreturn,%eax */ - 0x50, /* pushl %eax */ - 0xcd, 0x80, /* int $0x80 */ - 0xeb, 0xfe, /* 0: jmp 0b */ - 0, 0, 0, 0 -}; -static int ia32_szsigcode = sizeof(ia32_sigcode) & ~3; - -struct sysentvec elf32_freebsd_sysvec = { - SYS_MAXSYSCALL, - ia32_sysent, - 0, - 0, - 0, - 0, - 0, - 0, - elf32_freebsd_fixup, - sendsig, - ia32_sigcode, - &ia32_szsigcode, - 0, - "FreeBSD ELF", - elf32_coredump, - NULL, - MINSIGSTKSZ, - elf32_copyout_strings, - elf32_setregs -}; - -static Elf32_Brandinfo freebsd_brand_info = { - ELFOSABI_FREEBSD, - "FreeBSD", - "", - "/usr/libexec/ld-elf.so.1", - &elf32_freebsd_sysvec - }; -static Elf32_Brandinfo *elf32_brand_list[MAX_BRANDS] = { - &freebsd_brand_info, - NULL, NULL, NULL, - NULL, NULL, NULL, NULL - }; - -#if 0 - -int -elf32_insert_brand_entry(Elf32_Brandinfo *entry) -{ - int i; - - for (i=1; i<MAX_BRANDS; i++) { - if (elf32_brand_list[i] == NULL) { - elf32_brand_list[i] = entry; - break; - } - } - if (i == MAX_BRANDS) - return -1; - return 0; -} - -int -elf32_remove_brand_entry(Elf32_Brandinfo *entry) -{ - int i; - - for (i=1; i<MAX_BRANDS; i++) { - if (elf32_brand_list[i] == entry) { - elf32_brand_list[i] = NULL; - break; - } - } - if (i == MAX_BRANDS) - return -1; - return 0; -} - -int -elf32_brand_inuse(Elf32_Brandinfo *entry) -{ - struct proc *p; - int rval = FALSE; - - sx_slock(&allproc_lock); - LIST_FOREACH(p, &allproc, p_list) { - if (p->p_sysent == entry->sysvec) { - rval = TRUE; - break; - } - } - sx_sunlock(&allproc_lock); - - return (rval); -} - -#endif - -static int -elf32_check_header(const Elf32_Ehdr *hdr) -{ - if (!IS_ELF(*hdr) || - hdr->e_ident[EI_CLASS] != ELF_TARG_CLASS || - hdr->e_ident[EI_DATA] != ELF_TARG_DATA || - hdr->e_ident[EI_VERSION] != EV_CURRENT) - return ENOEXEC; - - if (!ELF_MACHINE_OK(hdr->e_machine)) - return ENOEXEC; - - if (hdr->e_version != ELF_TARG_VER) - return ENOEXEC; - - return 0; -} - -#define PAGE4K_SHIFT 12 -#define PAGE4K_MASK ((1 << PAGE4K_SHIFT)-1) -#define round_page4k(x) (((x) + PAGE4K_MASK) & ~(PAGE4K_MASK)) -#define trunc_page4k(x) ((x) & ~(PAGE4K_MASK)) - -static int -elf32_map_partial(vm_map_t map, vm_object_t object, vm_ooffset_t offset, - vm_offset_t start, vm_offset_t end, vm_prot_t prot, - vm_prot_t max) -{ - int error, rv; - vm_offset_t off; - vm_offset_t data_buf = 0; - - /* - * Create the page if it doesn't exist yet. Ignore errors. - */ - vm_map_lock(map); - vm_map_insert(map, NULL, 0, trunc_page(start), round_page(end), - max, max, 0); - vm_map_unlock(map); - - /* - * Find the page from the underlying object. - */ - if (object) { - vm_object_reference(object); - rv = vm_map_find(exec_map, - object, - trunc_page(offset), - &data_buf, - PAGE_SIZE, - TRUE, - VM_PROT_READ, - VM_PROT_ALL, - MAP_COPY_ON_WRITE | MAP_PREFAULT_PARTIAL); - if (rv != KERN_SUCCESS) { - vm_object_deallocate(object); - return rv; - } - - off = offset - trunc_page(offset); - error = copyout((caddr_t)data_buf+off, (caddr_t)start, end - start); - vm_map_remove(exec_map, data_buf, data_buf + PAGE_SIZE); - if (error) { - return KERN_FAILURE; - } - } - - return KERN_SUCCESS; -} - -static int -elf32_map_insert(vm_map_t map, vm_object_t object, vm_ooffset_t offset, - vm_offset_t start, vm_offset_t end, vm_prot_t prot, - vm_prot_t max, int cow) -{ - int rv; - - if (start != trunc_page(start)) { - rv = elf32_map_partial(map, object, offset, - start, round_page(start), prot, max); - if (rv) - return rv; - start = round_page(start); - offset = round_page(offset); - } - if (end != round_page(end)) { - rv = elf32_map_partial(map, object, offset, - trunc_page(end), end, prot, max); - if (rv) - return rv; - end = trunc_page(end); - } - if (end > start) { - vm_map_lock(map); - rv = vm_map_insert(map, object, offset, start, end, - prot, max, cow); - vm_map_unlock(map); - return rv; - } else { - return KERN_SUCCESS; - } -} - -static int -elf32_load_section(struct proc *p, struct vmspace *vmspace, struct vnode *vp, vm_offset_t offset, caddr_t vmaddr, size_t memsz, size_t filsz, vm_prot_t prot) -{ - size_t map_len; - vm_offset_t map_addr; - int error, rv; - size_t copy_len; - vm_object_t object; - vm_offset_t file_addr; - vm_offset_t data_buf = 0; - - GIANT_REQUIRED; - - VOP_GETVOBJECT(vp, &object); - error = 0; - - /* - * It's necessary to fail if the filsz + offset taken from the - * header is greater than the actual file pager object's size. - * If we were to allow this, then the vm_map_find() below would - * walk right off the end of the file object and into the ether. - * - * While I'm here, might as well check for something else that - * is invalid: filsz cannot be greater than memsz. - */ - if ((off_t)filsz + offset > object->un_pager.vnp.vnp_size || - filsz > memsz) { - uprintf("elf32_load_section: truncated ELF file\n"); - return (ENOEXEC); - } - - map_addr = trunc_page4k((vm_offset_t)vmaddr); - file_addr = trunc_page4k(offset); - - /* - * We have two choices. We can either clear the data in the last page - * of an oversized mapping, or we can start the anon mapping a page - * early and copy the initialized data into that first page. We - * choose the second.. - */ - if (memsz > filsz) - map_len = trunc_page4k(offset+filsz) - file_addr; - else - map_len = round_page4k(offset+filsz) - file_addr; - - if (map_len != 0) { - vm_object_reference(object); - rv = elf32_map_insert(&vmspace->vm_map, - object, - file_addr, /* file offset */ - map_addr, /* virtual start */ - map_addr + map_len,/* virtual end */ - prot, - VM_PROT_ALL, - MAP_COPY_ON_WRITE | MAP_PREFAULT); - if (rv != KERN_SUCCESS) { - vm_object_deallocate(object); - return EINVAL; - } - - /* we can stop now if we've covered it all */ - if (memsz == filsz) { - return 0; - } - } - - - /* - * We have to get the remaining bit of the file into the first part - * of the oversized map segment. This is normally because the .data - * segment in the file is extended to provide bss. It's a neat idea - * to try and save a page, but it's a pain in the behind to implement. - */ - copy_len = (offset + filsz) - trunc_page4k(offset + filsz); - map_addr = trunc_page4k((vm_offset_t)vmaddr + filsz); - map_len = round_page4k((vm_offset_t)vmaddr + memsz) - map_addr; - - /* This had damn well better be true! */ - if (map_len != 0) { - rv = elf32_map_insert(&vmspace->vm_map, NULL, 0, - map_addr, map_addr + map_len, - VM_PROT_ALL, VM_PROT_ALL, 0); - if (rv != KERN_SUCCESS) { - return EINVAL; - } - } - - if (copy_len != 0) { - vm_offset_t off; - vm_object_reference(object); - rv = vm_map_find(exec_map, - object, - trunc_page(offset + filsz), - &data_buf, - PAGE_SIZE, - TRUE, - VM_PROT_READ, - VM_PROT_ALL, - MAP_COPY_ON_WRITE | MAP_PREFAULT_PARTIAL); - if (rv != KERN_SUCCESS) { - vm_object_deallocate(object); - return EINVAL; - } - - /* send the page fragment to user space */ - off = trunc_page4k(offset + filsz) - trunc_page(offset + filsz); - error = copyout((caddr_t)data_buf+off, (caddr_t)map_addr, copy_len); - vm_map_remove(exec_map, data_buf, data_buf + PAGE_SIZE); - if (error) { - return (error); - } - } - - /* - * set it to the specified protection - */ - vm_map_protect(&vmspace->vm_map, map_addr, map_addr + map_len, prot, - FALSE); - - return error; -} - -/* - * Load the file "file" into memory. It may be either a shared object - * or an executable. - * - * The "addr" reference parameter is in/out. On entry, it specifies - * the address where a shared object should be loaded. If the file is - * an executable, this value is ignored. On exit, "addr" specifies - * where the file was actually loaded. - * - * The "entry" reference parameter is out only. On exit, it specifies - * the entry point for the loaded file. - */ -static int -elf32_load_file(struct proc *p, const char *file, u_long *addr, u_long *entry) -{ - struct { - struct nameidata nd; - struct vattr attr; - struct image_params image_params; - } *tempdata; - const Elf32_Ehdr *hdr = NULL; - const Elf32_Phdr *phdr = NULL; - struct nameidata *nd; - struct vmspace *vmspace = p->p_vmspace; - struct vattr *attr; - struct image_params *imgp; - vm_prot_t prot; - u_long rbase; - u_long base_addr = 0; - int error, i, numsegs; - - if (curthread->td_proc != p) - panic("elf32_load_file - thread"); /* XXXKSE DIAGNOSTIC */ - - tempdata = malloc(sizeof(*tempdata), M_TEMP, M_WAITOK); - nd = &tempdata->nd; - attr = &tempdata->attr; - imgp = &tempdata->image_params; - - /* - * Initialize part of the common data - */ - imgp->proc = p; - imgp->uap = NULL; - imgp->attr = attr; - imgp->firstpage = NULL; - imgp->image_header = (char *)kmem_alloc_wait(exec_map, PAGE_SIZE); - - if (imgp->image_header == NULL) { - nd->ni_vp = NULL; - error = ENOMEM; - goto fail; - } - - /* XXXKSE */ - NDINIT(nd, LOOKUP, LOCKLEAF|FOLLOW, UIO_SYSSPACE, file, curthread); - - if ((error = namei(nd)) != 0) { - nd->ni_vp = NULL; - goto fail; - } - NDFREE(nd, NDF_ONLY_PNBUF); - imgp->vp = nd->ni_vp; - - /* - * Check permissions, modes, uid, etc on the file, and "open" it. - */ - error = exec_check_permissions(imgp); - if (error) { - VOP_UNLOCK(nd->ni_vp, 0, curthread); /* XXXKSE */ - goto fail; - } - - error = exec_map_first_page(imgp); - /* - * Also make certain that the interpreter stays the same, so set - * its VTEXT flag, too. - */ - if (error == 0) - nd->ni_vp->v_flag |= VTEXT; - VOP_UNLOCK(nd->ni_vp, 0, curthread); /* XXXKSE */ - if (error) - goto fail; - - hdr = (const Elf32_Ehdr *)imgp->image_header; - if ((error = elf32_check_header(hdr)) != 0) - goto fail; - if (hdr->e_type == ET_DYN) - rbase = *addr; - else if (hdr->e_type == ET_EXEC) - rbase = 0; - else { - error = ENOEXEC; - goto fail; - } - - /* Only support headers that fit within first page for now */ - if ((hdr->e_phoff > PAGE_SIZE) || - (hdr->e_phoff + hdr->e_phentsize * hdr->e_phnum) > PAGE_SIZE) { - error = ENOEXEC; - goto fail; - } - - phdr = (const Elf32_Phdr *)(imgp->image_header + hdr->e_phoff); - - for (i = 0, numsegs = 0; i < hdr->e_phnum; i++) { - if (phdr[i].p_type == PT_LOAD) { /* Loadable segment */ - prot = 0; - if (phdr[i].p_flags & PF_X) - prot |= VM_PROT_EXECUTE; - if (phdr[i].p_flags & PF_W) - prot |= VM_PROT_WRITE; - if (phdr[i].p_flags & PF_R) - prot |= VM_PROT_READ; - - if ((error = elf32_load_section(p, vmspace, nd->ni_vp, - phdr[i].p_offset, - (caddr_t)(uintptr_t)phdr[i].p_vaddr + - rbase, - phdr[i].p_memsz, - phdr[i].p_filesz, prot)) != 0) - goto fail; - /* - * Establish the base address if this is the - * first segment. - */ - if (numsegs == 0) - base_addr = trunc_page(phdr[i].p_vaddr + rbase); - numsegs++; - } - } - *addr = base_addr; - *entry=(unsigned long)hdr->e_entry + rbase; - -fail: - if (imgp->firstpage) - exec_unmap_first_page(imgp); - if (imgp->image_header) - kmem_free_wakeup(exec_map, (vm_offset_t)imgp->image_header, - PAGE_SIZE); - if (nd->ni_vp) - vrele(nd->ni_vp); - - free(tempdata, M_TEMP); - - return error; -} - -/* - * non static, as it can be overridden by start_init() - */ -#ifdef __ia64__ -int fallback_elf32_brand = ELFOSABI_FREEBSD; -#else -int fallback_elf32_brand = -1; -#endif -SYSCTL_INT(_kern, OID_AUTO, fallback_elf32_brand, CTLFLAG_RW, - &fallback_elf32_brand, -1, - "ELF brand of last resort"); - -static int -exec_elf32_imgact(struct image_params *imgp) -{ - const Elf32_Ehdr *hdr = (const Elf32_Ehdr *) imgp->image_header; - const Elf32_Phdr *phdr; - Elf32_Auxargs *elf32_auxargs = NULL; - struct vmspace *vmspace; - vm_prot_t prot; - u_long text_size = 0, data_size = 0; - u_long text_addr = 0, data_addr = 0; - u_long addr, entry = 0, proghdr = 0; - int error, i; - const char *interp = NULL; - Elf32_Brandinfo *brand_info; - char *path; - - GIANT_REQUIRED; - - /* - * Do we have a valid ELF header ? - */ - if (elf32_check_header(hdr) != 0 || hdr->e_type != ET_EXEC) - return -1; - - /* - * From here on down, we return an errno, not -1, as we've - * detected an ELF file. - */ - - if ((hdr->e_phoff > PAGE_SIZE) || - (hdr->e_phoff + hdr->e_phentsize * hdr->e_phnum) > PAGE_SIZE) { - /* Only support headers in first page for now */ - return ENOEXEC; - } - phdr = (const Elf32_Phdr*)(imgp->image_header + hdr->e_phoff); - - /* - * From this point on, we may have resources that need to be freed. - */ - - /* - * Yeah, I'm paranoid. There is every reason in the world to get - * VTEXT now since from here on out, there are places we can have - * a context switch. Better safe than sorry; I really don't want - * the file to change while it's being loaded. - */ - mtx_lock(&imgp->vp->v_interlock); - imgp->vp->v_flag |= VTEXT; - mtx_unlock(&imgp->vp->v_interlock); - - if ((error = exec_extract_strings(imgp)) != 0) - goto fail; - - exec_new_vmspace(imgp, IA32_USRSTACK); - - vmspace = imgp->proc->p_vmspace; - - for (i = 0; i < hdr->e_phnum; i++) { - switch(phdr[i].p_type) { - - case PT_LOAD: /* Loadable segment */ - prot = 0; - if (phdr[i].p_flags & PF_X) - prot |= VM_PROT_EXECUTE; - if (phdr[i].p_flags & PF_W) - prot |= VM_PROT_WRITE; - if (phdr[i].p_flags & PF_R) - prot |= VM_PROT_READ; - - if ((error = elf32_load_section(imgp->proc, - vmspace, imgp->vp, - phdr[i].p_offset, - (caddr_t)(uintptr_t)phdr[i].p_vaddr, - phdr[i].p_memsz, - phdr[i].p_filesz, prot)) != 0) - goto fail; - - /* - * Is this .text or .data ?? - * - * We only handle one each of those yet XXX - */ - if (hdr->e_entry >= phdr[i].p_vaddr && - hdr->e_entry <(phdr[i].p_vaddr+phdr[i].p_memsz)) { - text_addr = trunc_page(phdr[i].p_vaddr); - text_size = round_page(phdr[i].p_memsz + - phdr[i].p_vaddr - - text_addr); - entry = (u_long)hdr->e_entry; - } else { - data_addr = trunc_page(phdr[i].p_vaddr); - data_size = round_page(phdr[i].p_memsz + - phdr[i].p_vaddr - - data_addr); - } - break; - case PT_INTERP: /* Path to interpreter */ - if (phdr[i].p_filesz > MAXPATHLEN || - phdr[i].p_offset + phdr[i].p_filesz > PAGE_SIZE) { - error = ENOEXEC; - goto fail; - } - interp = imgp->image_header + phdr[i].p_offset; - break; - case PT_PHDR: /* Program header table info */ - proghdr = phdr[i].p_vaddr; - break; - default: - break; - } - } - - vmspace->vm_tsize = text_size >> PAGE_SHIFT; - vmspace->vm_taddr = (caddr_t)(uintptr_t)text_addr; - vmspace->vm_dsize = data_size >> PAGE_SHIFT; - vmspace->vm_daddr = (caddr_t)(uintptr_t)data_addr; - - addr = ELF_RTLD_ADDR(vmspace); - - imgp->entry_addr = entry; - - brand_info = NULL; - - /* We support three types of branding -- (1) the ELF EI_OSABI field - * that SCO added to the ELF spec, (2) FreeBSD 3.x's traditional string - * branding w/in the ELF header, and (3) path of the `interp_path' - * field. We should also look for an ".note.ABI-tag" ELF section now - * in all Linux ELF binaries, FreeBSD 4.1+, and some NetBSD ones. - */ - - /* If the executable has a brand, search for it in the brand list. */ - if (brand_info == NULL) { - for (i = 0; i < MAX_BRANDS; i++) { - Elf32_Brandinfo *bi = elf32_brand_list[i]; - - if (bi != NULL && - (hdr->e_ident[EI_OSABI] == bi->brand - || 0 == - strncmp((const char *)&hdr->e_ident[OLD_EI_BRAND], - bi->compat_3_brand, strlen(bi->compat_3_brand)))) { - brand_info = bi; - break; - } - } - } - - /* Lacking a known brand, search for a recognized interpreter. */ - if (brand_info == NULL && interp != NULL) { - for (i = 0; i < MAX_BRANDS; i++) { - Elf32_Brandinfo *bi = elf32_brand_list[i]; - - if (bi != NULL && - strcmp(interp, bi->interp_path) == 0) { - brand_info = bi; - break; - } - } - } - - /* Lacking a recognized interpreter, try the default brand */ - if (brand_info == NULL) { - for (i = 0; i < MAX_BRANDS; i++) { - Elf32_Brandinfo *bi = elf32_brand_list[i]; - - if (bi != NULL && fallback_elf32_brand == bi->brand) { - brand_info = bi; - break; - } - } - } - - if (brand_info == NULL) { - uprintf("ELF binary type \"%u\" not known.\n", - hdr->e_ident[EI_OSABI]); - error = ENOEXEC; - goto fail; - } - - imgp->proc->p_sysent = brand_info->sysvec; - if (interp != NULL) { - path = malloc(MAXPATHLEN, M_TEMP, M_WAITOK); - snprintf(path, MAXPATHLEN, "%s%s", - brand_info->emul_path, interp); - if ((error = elf32_load_file(imgp->proc, path, &addr, - &imgp->entry_addr)) != 0) { - if ((error = elf32_load_file(imgp->proc, interp, &addr, - &imgp->entry_addr)) != 0) { - uprintf("ELF interpreter %s not found\n", path); - free(path, M_TEMP); - goto fail; - } - } - free(path, M_TEMP); - } - - /* - * Construct auxargs table (used by the fixup routine) - */ - elf32_auxargs = malloc(sizeof(Elf32_Auxargs), M_TEMP, M_WAITOK); - elf32_auxargs->execfd = -1; - elf32_auxargs->phdr = proghdr; - elf32_auxargs->phent = hdr->e_phentsize; - elf32_auxargs->phnum = hdr->e_phnum; - elf32_auxargs->pagesz = PAGE_SIZE; - elf32_auxargs->base = addr; - elf32_auxargs->flags = 0; - elf32_auxargs->entry = entry; - elf32_auxargs->trace = elf32_trace; - - imgp->auxargs = elf32_auxargs; - imgp->interpreted = 0; - -fail: - return error; -} - -#define AUXARGS32_ENTRY(pos, id, val) { \ - suword32(pos++, id); \ - suword32(pos++, val); \ -} - -static int -elf32_freebsd_fixup(register_t **stack_base, struct image_params *imgp) -{ - Elf32_Auxargs *args = (Elf32_Auxargs *)imgp->auxargs; - u_int32_t *pos; - - pos = *(u_int32_t **)stack_base + (imgp->argc + imgp->envc + 2); - - if (args->trace) { - AUXARGS32_ENTRY(pos, AT_DEBUG, 1); - } - if (args->execfd != -1) { - AUXARGS32_ENTRY(pos, AT_EXECFD, args->execfd); - } - AUXARGS32_ENTRY(pos, AT_PHDR, args->phdr); - AUXARGS32_ENTRY(pos, AT_PHENT, args->phent); - AUXARGS32_ENTRY(pos, AT_PHNUM, args->phnum); - AUXARGS32_ENTRY(pos, AT_PAGESZ, args->pagesz); - AUXARGS32_ENTRY(pos, AT_FLAGS, args->flags); - AUXARGS32_ENTRY(pos, AT_ENTRY, args->entry); - AUXARGS32_ENTRY(pos, AT_BASE, args->base); - AUXARGS32_ENTRY(pos, AT_NULL, 0); - - free(imgp->auxargs, M_TEMP); - imgp->auxargs = NULL; - - (*(u_int32_t **)stack_base)--; - suword32(*stack_base, (long) imgp->argc); - return 0; -} - -/* - * Code for generating ELF core dumps. - */ - -typedef void (*segment_callback)(vm_map_entry_t, void *); - -/* Closure for cb_put_phdr(). */ -struct phdr_closure { - Elf32_Phdr *phdr; /* Program header to fill in */ - Elf32_Off offset; /* Offset of segment in core file */ -}; - -/* Closure for cb_size_segment(). */ -struct sseg_closure { - int count; /* Count of writable segments. */ - size_t size; /* Total size of all writable segments. */ -}; - -static void cb_put_phdr(vm_map_entry_t, void *); -static void cb_size_segment(vm_map_entry_t, void *); -static void each_writable_segment(struct proc *, segment_callback, void *); -static int elf32_corehdr(struct thread *, struct vnode *, struct ucred *, - int, void *, size_t); -static void elf32_puthdr(struct proc *, void *, size_t *, - const prstatus_t *, const prfpregset_t *, const prpsinfo_t *, int); -static void elf32_putnote(void *, size_t *, const char *, int, - const void *, size_t); - -extern int osreldate; - -static int -elf32_coredump(td, vp, limit) - struct thread *td; - register struct vnode *vp; - off_t limit; -{ - register struct proc *p = td->td_proc; - register struct ucred *cred = td->td_ucred; - int error = 0; - struct sseg_closure seginfo; - void *hdr; - size_t hdrsize; - - /* Size the program segments. */ - seginfo.count = 0; - seginfo.size = 0; - each_writable_segment(p, cb_size_segment, &seginfo); - - /* - * Calculate the size of the core file header area by making - * a dry run of generating it. Nothing is written, but the - * size is calculated. - */ - hdrsize = 0; - elf32_puthdr((struct proc *)NULL, (void *)NULL, &hdrsize, - (const prstatus_t *)NULL, (const prfpregset_t *)NULL, - (const prpsinfo_t *)NULL, seginfo.count); - - if (hdrsize + seginfo.size >= limit) - return (EFAULT); - - /* - * Allocate memory for building the header, fill it up, - * and write it out. - */ - hdr = malloc(hdrsize, M_TEMP, M_WAITOK); - if (hdr == NULL) { - return EINVAL; - } - error = elf32_corehdr(td, vp, cred, seginfo.count, hdr, hdrsize); - - /* Write the contents of all of the writable segments. */ - if (error == 0) { - Elf32_Phdr *php; - off_t offset; - int i; - - php = (Elf32_Phdr *)((char *)hdr + sizeof(Elf32_Ehdr)) + 1; - offset = hdrsize; - for (i = 0; i < seginfo.count; i++) { - error = vn_rdwr_inchunks(UIO_WRITE, vp, - (caddr_t)(uintptr_t)php->p_vaddr, - php->p_filesz, offset, UIO_USERSPACE, - IO_UNIT | IO_DIRECT, cred, (int *)NULL, curthread); /* XXXKSE */ - if (error != 0) - break; - offset += php->p_filesz; - php++; - } - } - free(hdr, M_TEMP); - - return error; -} - -/* - * A callback for each_writable_segment() to write out the segment's - * program header entry. - */ -static void -cb_put_phdr(entry, closure) - vm_map_entry_t entry; - void *closure; -{ - struct phdr_closure *phc = (struct phdr_closure *)closure; - Elf32_Phdr *phdr = phc->phdr; - - phc->offset = round_page(phc->offset); - - phdr->p_type = PT_LOAD; - phdr->p_offset = phc->offset; - phdr->p_vaddr = entry->start; - phdr->p_paddr = 0; - phdr->p_filesz = phdr->p_memsz = entry->end - entry->start; - phdr->p_align = PAGE_SIZE; - phdr->p_flags = 0; - if (entry->protection & VM_PROT_READ) - phdr->p_flags |= PF_R; - if (entry->protection & VM_PROT_WRITE) - phdr->p_flags |= PF_W; - if (entry->protection & VM_PROT_EXECUTE) - phdr->p_flags |= PF_X; - - phc->offset += phdr->p_filesz; - phc->phdr++; -} - -/* - * A callback for each_writable_segment() to gather information about - * the number of segments and their total size. - */ -static void -cb_size_segment(entry, closure) - vm_map_entry_t entry; - void *closure; -{ - struct sseg_closure *ssc = (struct sseg_closure *)closure; - - ssc->count++; - ssc->size += entry->end - entry->start; -} - -/* - * For each writable segment in the process's memory map, call the given - * function with a pointer to the map entry and some arbitrary - * caller-supplied data. - */ -static void -each_writable_segment(p, func, closure) - struct proc *p; - segment_callback func; - void *closure; -{ - vm_map_t map = &p->p_vmspace->vm_map; - vm_map_entry_t entry; - - for (entry = map->header.next; entry != &map->header; - entry = entry->next) { - vm_object_t obj; - - if ((entry->eflags & MAP_ENTRY_IS_SUB_MAP) || - (entry->protection & (VM_PROT_READ|VM_PROT_WRITE)) != - (VM_PROT_READ|VM_PROT_WRITE)) - continue; - - /* - ** Dont include memory segment in the coredump if - ** MAP_NOCORE is set in mmap(2) or MADV_NOCORE in - ** madvise(2). - */ - if (entry->eflags & MAP_ENTRY_NOCOREDUMP) - continue; - - if ((obj = entry->object.vm_object) == NULL) - continue; - - /* Find the deepest backing object. */ - while (obj->backing_object != NULL) - obj = obj->backing_object; - - /* Ignore memory-mapped devices and such things. */ - if (obj->type != OBJT_DEFAULT && - obj->type != OBJT_SWAP && - obj->type != OBJT_VNODE) - continue; - - (*func)(entry, closure); - } -} - -/* - * Write the core file header to the file, including padding up to - * the page boundary. - */ -static int -elf32_corehdr(td, vp, cred, numsegs, hdr, hdrsize) - struct thread *td; - struct vnode *vp; - struct ucred *cred; - int numsegs; - size_t hdrsize; - void *hdr; -{ - struct { - prstatus_t status; - prfpregset_t fpregset; - prpsinfo_t psinfo; - } *tempdata; - struct proc *p = td->td_proc; - size_t off; - prstatus_t *status; - prfpregset_t *fpregset; - prpsinfo_t *psinfo; - - tempdata = malloc(sizeof(*tempdata), M_TEMP, M_ZERO | M_WAITOK); - status = &tempdata->status; - fpregset = &tempdata->fpregset; - psinfo = &tempdata->psinfo; - - /* Gather the information for the header. */ - status->pr_version = PRSTATUS_VERSION; - status->pr_statussz = sizeof(prstatus_t); - status->pr_gregsetsz = sizeof(gregset_t); - status->pr_fpregsetsz = sizeof(fpregset_t); - status->pr_osreldate = osreldate; - status->pr_cursig = p->p_sig; - status->pr_pid = p->p_pid; - fill_regs(td, &status->pr_reg); - - fill_fpregs(td, fpregset); - - psinfo->pr_version = PRPSINFO_VERSION; - psinfo->pr_psinfosz = sizeof(prpsinfo_t); - strncpy(psinfo->pr_fname, p->p_comm, sizeof(psinfo->pr_fname) - 1); - - /* XXX - We don't fill in the command line arguments properly yet. */ - strncpy(psinfo->pr_psargs, p->p_comm, PRARGSZ); - - /* Fill in the header. */ - bzero(hdr, hdrsize); - off = 0; - elf32_puthdr(p, hdr, &off, status, fpregset, psinfo, numsegs); - - free(tempdata, M_TEMP); - - /* Write it to the core file. */ - return vn_rdwr_inchunks(UIO_WRITE, vp, hdr, hdrsize, (off_t)0, - UIO_SYSSPACE, IO_UNIT | IO_DIRECT, cred, NULL, td); /* XXXKSE */ -} - -static void -elf32_puthdr(struct proc *p, void *dst, size_t *off, const prstatus_t *status, - const prfpregset_t *fpregset, const prpsinfo_t *psinfo, int numsegs) -{ - size_t ehoff; - size_t phoff; - size_t noteoff; - size_t notesz; - - ehoff = *off; - *off += sizeof(Elf32_Ehdr); - - phoff = *off; - *off += (numsegs + 1) * sizeof(Elf32_Phdr); - - noteoff = *off; - elf32_putnote(dst, off, "FreeBSD", NT_PRSTATUS, status, - sizeof *status); - elf32_putnote(dst, off, "FreeBSD", NT_FPREGSET, fpregset, - sizeof *fpregset); - elf32_putnote(dst, off, "FreeBSD", NT_PRPSINFO, psinfo, - sizeof *psinfo); - notesz = *off - noteoff; - - /* Align up to a page boundary for the program segments. */ - *off = round_page(*off); - - if (dst != NULL) { - Elf32_Ehdr *ehdr; - Elf32_Phdr *phdr; - struct phdr_closure phc; - - /* - * Fill in the ELF header. - */ - ehdr = (Elf32_Ehdr *)((char *)dst + ehoff); - ehdr->e_ident[EI_MAG0] = ELFMAG0; - ehdr->e_ident[EI_MAG1] = ELFMAG1; - ehdr->e_ident[EI_MAG2] = ELFMAG2; - ehdr->e_ident[EI_MAG3] = ELFMAG3; - ehdr->e_ident[EI_CLASS] = ELF_CLASS; - ehdr->e_ident[EI_DATA] = ELF_DATA; - ehdr->e_ident[EI_VERSION] = EV_CURRENT; - ehdr->e_ident[EI_OSABI] = ELFOSABI_FREEBSD; - ehdr->e_ident[EI_ABIVERSION] = 0; - ehdr->e_ident[EI_PAD] = 0; - ehdr->e_type = ET_CORE; - ehdr->e_machine = ELF_ARCH; - ehdr->e_version = EV_CURRENT; - ehdr->e_entry = 0; - ehdr->e_phoff = phoff; - ehdr->e_flags = 0; - ehdr->e_ehsize = sizeof(Elf32_Ehdr); - ehdr->e_phentsize = sizeof(Elf32_Phdr); - ehdr->e_phnum = numsegs + 1; - ehdr->e_shentsize = sizeof(Elf32_Shdr); - ehdr->e_shnum = 0; - ehdr->e_shstrndx = SHN_UNDEF; - - /* - * Fill in the program header entries. - */ - phdr = (Elf32_Phdr *)((char *)dst + phoff); - - /* The note segement. */ - phdr->p_type = PT_NOTE; - phdr->p_offset = noteoff; - phdr->p_vaddr = 0; - phdr->p_paddr = 0; - phdr->p_filesz = notesz; - phdr->p_memsz = 0; - phdr->p_flags = 0; - phdr->p_align = 0; - phdr++; - - /* All the writable segments from the program. */ - phc.phdr = phdr; - phc.offset = *off; - each_writable_segment(p, cb_put_phdr, &phc); - } -} - -static void -elf32_putnote(void *dst, size_t *off, const char *name, int type, - const void *desc, size_t descsz) -{ - Elf_Note note; - - note.n_namesz = strlen(name) + 1; - note.n_descsz = descsz; - note.n_type = type; - if (dst != NULL) - bcopy(¬e, (char *)dst + *off, sizeof note); - *off += sizeof note; - if (dst != NULL) - bcopy(name, (char *)dst + *off, note.n_namesz); - *off += roundup2(note.n_namesz, sizeof(Elf32_Size)); - if (dst != NULL) - bcopy(desc, (char *)dst + *off, note.n_descsz); - *off += roundup2(note.n_descsz, sizeof(Elf32_Size)); -} - -struct ia32_ps_strings { - u_int32_t ps_argvstr; /* first of 0 or more argument strings */ - int ps_nargvstr; /* the number of argument strings */ - u_int32_t ps_envstr; /* first of 0 or more environment strings */ - int ps_nenvstr; /* the number of environment strings */ -}; - -static register_t * -elf32_copyout_strings(struct image_params *imgp) -{ - int argc, envc; - u_int32_t *vectp; - char *stringp, *destp; - u_int32_t *stack_base; - struct ia32_ps_strings *arginfo; - int szsigcode; - - /* - * Calculate string base and vector table pointers. - * Also deal with signal trampoline code for this exec type. - */ - arginfo = (struct ia32_ps_strings *)IA32_PS_STRINGS; - szsigcode = *(imgp->proc->p_sysent->sv_szsigcode); - destp = (caddr_t)arginfo - szsigcode - SPARE_USRSPACE - - roundup((ARG_MAX - imgp->stringspace), sizeof(char *)); - - /* - * install sigcode - */ - if (szsigcode) - copyout(imgp->proc->p_sysent->sv_sigcode, - ((caddr_t)arginfo - szsigcode), szsigcode); - - /* - * If we have a valid auxargs ptr, prepare some room - * on the stack. - */ - if (imgp->auxargs) { - /* - * 'AT_COUNT*2' is size for the ELF Auxargs data. This is for - * lower compatibility. - */ - imgp->auxarg_size = (imgp->auxarg_size) ? imgp->auxarg_size - : (AT_COUNT * 2); - /* - * The '+ 2' is for the null pointers at the end of each of - * the arg and env vector sets,and imgp->auxarg_size is room - * for argument of Runtime loader. - */ - vectp = (u_int32_t *) (destp - (imgp->argc + imgp->envc + 2 + - imgp->auxarg_size) * sizeof(u_int32_t)); - - } else - /* - * The '+ 2' is for the null pointers at the end of each of - * the arg and env vector sets - */ - vectp = (u_int32_t *) - (destp - (imgp->argc + imgp->envc + 2) * sizeof(u_int32_t)); - - /* - * vectp also becomes our initial stack base - */ - stack_base = vectp; - - stringp = imgp->stringbase; - argc = imgp->argc; - envc = imgp->envc; - - /* - * Copy out strings - arguments and environment. - */ - copyout(stringp, destp, ARG_MAX - imgp->stringspace); - - /* - * Fill in "ps_strings" struct for ps, w, etc. - */ - suword32(&arginfo->ps_argvstr, (u_int32_t)(intptr_t)vectp); - suword32(&arginfo->ps_nargvstr, argc); - - /* - * Fill in argument portion of vector table. - */ - for (; argc > 0; --argc) { - suword32(vectp++, (u_int32_t)(intptr_t)destp); - while (*stringp++ != 0) - destp++; - destp++; - } - - /* a null vector table pointer separates the argp's from the envp's */ - suword32(vectp++, 0); - - suword32(&arginfo->ps_envstr, (u_int32_t)(intptr_t)vectp); - suword32(&arginfo->ps_nenvstr, envc); - - /* - * Fill in environment portion of vector table. - */ - for (; envc > 0; --envc) { - suword32(vectp++, (u_int32_t)(intptr_t)destp); - while (*stringp++ != 0) - destp++; - destp++; - } - - /* end of vector table is a null pointer */ - suword32(vectp, 0); - - return ((register_t *)stack_base); -} - -static void -elf32_setregs(struct thread *td, u_long entry, u_long stack, - u_long ps_strings) -{ - struct trapframe *frame = td->td_frame; - vm_offset_t gdt, ldt; - u_int64_t codesel, datasel, ldtsel; - u_int64_t codeseg, dataseg, gdtseg, ldtseg; - struct segment_descriptor desc; - struct vmspace *vmspace = td->td_proc->p_vmspace; - - /* - * Make sure that we restore the entire trapframe after an - * execve. - */ - frame->tf_flags &= ~FRAME_SYSCALL; - - bzero(frame->tf_r, sizeof(frame->tf_r)); - bzero(frame->tf_f, sizeof(frame->tf_f)); - - frame->tf_cr_iip = entry; - frame->tf_cr_ipsr = (IA64_PSR_IC - | IA64_PSR_I - | IA64_PSR_IT - | IA64_PSR_DT - | IA64_PSR_RT - | IA64_PSR_IS - | IA64_PSR_BN - | IA64_PSR_CPL_USER); - frame->tf_r[FRAME_R12] = stack; - - codesel = LSEL(LUCODE_SEL, SEL_UPL); - datasel = LSEL(LUDATA_SEL, SEL_UPL); - ldtsel = GSEL(GLDT_SEL, SEL_UPL); - -#if 1 - frame->tf_r[FRAME_R16] = (datasel << 48) | (datasel << 32) - | (datasel << 16) | datasel; - frame->tf_r[FRAME_R17] = (ldtsel << 32) | (datasel << 16) | codesel; -#else - frame->tf_r[FRAME_R16] = datasel; - frame->tf_r[FRAME_R17] = codesel; - frame->tf_r[FRAME_R18] = datasel; - frame->tf_r[FRAME_R19] = datasel; - frame->tf_r[FRAME_R20] = datasel; - frame->tf_r[FRAME_R21] = datasel; - frame->tf_r[FRAME_R22] = ldtsel; -#endif - - /* - * Build the GDT and LDT. - */ - gdt = IA32_USRSTACK; - vm_map_find(&vmspace->vm_map, 0, 0, - &gdt, PAGE_SIZE, 0, - VM_PROT_ALL, VM_PROT_ALL, 0); - ldt = gdt + 4096; - - desc.sd_lolimit = 8*NLDT-1; - desc.sd_lobase = ldt & 0xffffff; - desc.sd_type = SDT_SYSLDT; - desc.sd_dpl = SEL_UPL; - desc.sd_p = 1; - desc.sd_hilimit = 0; - desc.sd_def32 = 0; - desc.sd_gran = 0; - desc.sd_hibase = ldt >> 24; - copyout(&desc, (caddr_t) gdt + 8*GLDT_SEL, sizeof(desc)); - - desc.sd_lolimit = ((IA32_USRSTACK >> 12) - 1) & 0xffff; - desc.sd_lobase = 0; - desc.sd_type = SDT_MEMERA; - desc.sd_dpl = SEL_UPL; - desc.sd_p = 1; - desc.sd_hilimit = ((IA32_USRSTACK >> 12) - 1) >> 16; - desc.sd_def32 = 1; - desc.sd_gran = 1; - desc.sd_hibase = 0; - copyout(&desc, (caddr_t) ldt + 8*LUCODE_SEL, sizeof(desc)); - desc.sd_type = SDT_MEMRWA; - copyout(&desc, (caddr_t) ldt + 8*LUDATA_SEL, sizeof(desc)); - - codeseg = 0 /* base */ - + (((IA32_USRSTACK >> 12) - 1) << 32) /* limit */ - + ((long)SDT_MEMERA << 52) - + ((long)SEL_UPL << 57) - + (1L << 59) /* present */ - + (1L << 62) /* 32 bits */ - + (1L << 63); /* page granularity */ - dataseg = 0 /* base */ - + (((IA32_USRSTACK >> 12) - 1) << 32) /* limit */ - + ((long)SDT_MEMRWA << 52) - + ((long)SEL_UPL << 57) - + (1L << 59) /* present */ - + (1L << 62) /* 32 bits */ - + (1L << 63); /* page granularity */ - ia64_set_csd(codeseg); - ia64_set_ssd(dataseg); - frame->tf_r[FRAME_R24] = dataseg; /* ESD */ - frame->tf_r[FRAME_R27] = dataseg; /* DSD */ - frame->tf_r[FRAME_R28] = dataseg; /* FSD */ - frame->tf_r[FRAME_R29] = dataseg; /* GSD */ - - gdtseg = gdt /* base */ - + ((8L*NGDT - 1) << 32) /* limit */ - + ((long)SDT_SYSNULL << 52) - + ((long)SEL_UPL << 57) - + (1L << 59) /* present */ - + (0L << 62) /* 16 bits */ - + (0L << 63); /* byte granularity */ - ldtseg = ldt /* base */ - + ((8L*NLDT - 1) << 32) /* limit */ - + ((long)SDT_SYSLDT << 52) - + ((long)SEL_UPL << 57) - + (1L << 59) /* present */ - + (0L << 62) /* 16 bits */ - + (0L << 63); /* byte granularity */ - frame->tf_r[FRAME_R30] = ldtseg; /* LDTD */ - frame->tf_r[FRAME_R31] = gdtseg; /* GDTD */ - - ia64_set_eflag(PSL_USER); - - /* PS_STRINGS value for BSD/OS binaries. It is 0 for non-BSD/OS. */ - frame->tf_r[FRAME_R11] = ps_strings; - - /* - * Set ia32 control registers. - */ - ia64_set_cflg((CR0_PE | CR0_PG) - | ((long)(CR4_XMM | CR4_FXSR) << 32)); - - /* - * XXX - Linux emulator - * Make sure sure edx is 0x0 on entry. Linux binaries depend - * on it. - */ - td->td_retval[1] = 0; -} - -/* - * Tell kern_execve.c about it, with a little help from the linker. - */ -static struct execsw elf32_execsw = {exec_elf32_imgact, "ELF32"}; -EXEC_SET(elf32, elf32_execsw); |
