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freebsd-dev/sys/i386/ibcs2/imgact_coff.c

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/*-
* Copyright (c) 1994 Sean Eric Fagan
* Copyright (c) 1994 Søren Schmidt
* 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 withough 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.
*
* $Id: imgact_coff.c,v 1.1 1994/10/14 08:53:13 sos Exp $
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/resourcevar.h>
#include <sys/exec.h>
#include <sys/mman.h>
#include <sys/imgact.h>
#include <sys/kernel.h>
#include <sys/file.h>
#include <sys/malloc.h>
#include <sys/mount.h>
#include <sys/sysent.h>
#include <vm/vm.h>
#include <vm/vm_kern.h>
#include "coff.h"
#include "ibcs2.h"
static int
load_coff_section(vmspace, vp, offset, vmaddr, memsz, filsz, prot)
struct vmspace *vmspace;
struct vnode *vp;
vm_offset_t offset;
caddr_t vmaddr;
size_t memsz, filsz;
vm_prot_t prot;
{
size_t map_len;
vm_offset_t map_offset;
caddr_t map_addr;
int error;
unsigned char *data_buf = 0;
size_t copy_len;
map_offset = trunc_page(offset);
map_addr = (caddr_t)trunc_page(vmaddr);
if (memsz > filsz) {
/*
* We have the stupid situation that
* the section is longer than it is on file,
* which means it has zero-filled areas, and
* we have to work for it. Stupid iBCS!
*/
map_len = trunc_page(offset + filsz) - trunc_page(map_offset);
} else {
/*
* The only stuff we care about is on disk, and we
* don't care if we map in more than is really there.
*/
map_len = round_page(offset + filsz) - trunc_page(map_offset);
}
if (ibcs2_trace & IBCS2_TRACE_COFF) {
printf("%s(%d): vm_mmap(&vmspace->vm_map, &0x%08lx, 0x%x, 0x%x, "
"VM_PROT_ALL, MAP_FILE | MAP_PRIVATE | MAP_FIXED, vp, 0x%x)\n",
__FILE__, __LINE__, map_addr, map_len, prot, map_offset);
}
if (error = vm_mmap(&vmspace->vm_map,
&map_addr,
map_len,
prot,
VM_PROT_ALL,
MAP_FILE | MAP_PRIVATE | MAP_FIXED,
vp,
map_offset))
return error;
if (memsz == filsz) {
/* We're done! */
return 0;
}
/*
* Now we have screwball stuff, to accomodate stupid COFF.
* We have to map the remaining bit of the file into the kernel's
* memory map, allocate some anonymous memory, copy that last
* bit into it, and then we're done. *sigh*
* For clean-up reasons, we actally map in the file last.
*/
copy_len = (offset + filsz) - trunc_page(offset + filsz);
map_addr = (caddr_t)trunc_page(vmaddr + filsz);
map_len = round_page(memsz) - trunc_page(filsz);
if (ibcs2_trace & IBCS2_TRACE_COFF) {
printf("%s(%d): vm_map_find(&vmspace->vm_map, NULL, 0, &0x%08lx, 0x%x, FALSE)\n",
__FILE__, __LINE__, map_addr, map_len);
}
if (map_len != 0) {
error = vm_map_find(&vmspace->vm_map, NULL, 0, &map_addr, map_len, FALSE);
if (error)
return error;
}
if (error = vm_mmap(kernel_map, &data_buf, PAGE_SIZE,
VM_PROT_READ, VM_PROT_READ, MAP_FILE,
vp, trunc_page(offset + filsz)))
return error;
bcopy(data_buf, map_addr, copy_len);
if (vm_map_remove(kernel_map, data_buf, data_buf + PAGE_SIZE))
panic("load_coff_section vm_map_remove failed");
return 0;
}
int
coff_load_file(struct proc *p, char *name)
{
struct vmspace *vmspace = p->p_vmspace;
int error;
struct nameidata nd;
struct vnode *vnodep;
struct vattr attr;
struct filehdr *fhdr;
struct aouthdr *ahdr;
struct scnhdr *scns;
char *ptr = 0;
int nscns;
unsigned long text_offset = 0, text_address = 0, text_size = 0;
unsigned long data_offset = 0, data_address = 0, data_size = 0;
unsigned long bss_size = 0;
int i;
nd.ni_cnd.cn_nameiop = LOOKUP;
nd.ni_cnd.cn_flags = LOCKLEAF | FOLLOW | SAVENAME;
nd.ni_cnd.cn_proc = curproc;
nd.ni_cnd.cn_cred = curproc->p_cred->pc_ucred;
nd.ni_segflg = UIO_SYSSPACE;
nd.ni_dirp = name;
error = namei(&nd);
if (error)
return error;
vnodep = nd.ni_vp;
if (vnodep == NULL)
return ENOEXEC;
if (vnodep->v_writecount) {
error = ETXTBSY;
goto fail;
}
if (error = VOP_GETATTR(vnodep, &attr, p->p_ucred, p))
goto fail;
if ((vnodep->v_mount->mnt_flag & MNT_NOEXEC)
|| ((attr.va_mode & 0111) == 0)
|| (attr.va_type != VREG))
goto fail;
if (attr.va_size == 0) {
error = ENOEXEC;
goto fail;
}
if (error = VOP_ACCESS(vnodep, VEXEC, p->p_ucred, p))
goto fail;
if (error = VOP_OPEN(vnodep, FREAD, p->p_ucred, p))
goto fail;
if (error = vm_mmap(kernel_map, &ptr, PAGE_SIZE, VM_PROT_READ,
VM_PROT_READ, MAP_FILE, vnodep, 0))
goto fail;
fhdr = (struct filehdr *)ptr;
if (fhdr->f_magic != I386_COFF) {
error = ENOEXEC;
goto dealloc_and_fail;
}
nscns = fhdr->f_nscns;
if ((nscns * sizeof(struct scnhdr)) > PAGE_SIZE) {
/*
* XXX -- just fail. I'm so lazy.
*/
error = ENOEXEC;
goto dealloc_and_fail;
}
ahdr = (struct aouthdr*)(ptr + sizeof(struct filehdr));
scns = (struct scnhdr*)(ptr + sizeof(struct filehdr)
+ sizeof(struct aouthdr));
for (i = 0; i < nscns; i++) {
if (scns[i].s_flags & STYP_NOLOAD)
continue;
else if (scns[i].s_flags & STYP_TEXT) {
text_address = scns[i].s_vaddr;
text_size = scns[i].s_size;
text_offset = scns[i].s_scnptr;
}
else if (scns[i].s_flags & STYP_DATA) {
data_address = scns[i].s_vaddr;
data_size = scns[i].s_size;
data_offset = scns[i].s_scnptr;
} else if (scns[i].s_flags & STYP_BSS) {
bss_size = scns[i].s_size;
}
}
if (error = load_coff_section(vmspace, vnodep, text_offset,
(caddr_t)text_address,
text_size, text_size,
VM_PROT_READ | VM_PROT_EXECUTE)) {
goto dealloc_and_fail;
}
if (error = load_coff_section(vmspace, vnodep, data_offset,
(caddr_t)data_address,
data_size + bss_size, data_size,
VM_PROT_ALL)) {
goto dealloc_and_fail;
}
error = 0;
dealloc_and_fail:
if (vm_map_remove(kernel_map, ptr, ptr + PAGE_SIZE))
panic(__FUNCTION__ " vm_map_remove failed");
fail:
vput(nd.ni_vp);
FREE(nd.ni_cnd.cn_pnbuf, M_NAMEI);
return error;
}
int
exec_coff_imgact(iparams)
struct image_params *iparams;
{
struct filehdr *fhdr = (struct filehdr*)iparams->image_header;
struct aouthdr *ahdr;
struct scnhdr *scns;
int i;
struct vmspace *vmspace = iparams->proc->p_vmspace;
unsigned long vmaddr;
int nscns;
int error, len;
extern struct sysentvec ibcs2_svr3_sysvec;
unsigned long text_offset = 0, text_address = 0, text_size = 0;
unsigned long data_offset = 0, data_address = 0, data_size = 0;
unsigned long bss_size = 0;
int need_hack_p;
unsigned long data_end;
unsigned long data_map_start, data_map_len, data_map_addr = 0;
unsigned long bss_address, bss_map_start, data_copy_len, bss_map_len;
unsigned char *data_buf = 0;
caddr_t hole;
if (fhdr->f_magic != I386_COFF ||
!(fhdr->f_flags & F_EXEC)) {
if (ibcs2_trace & IBCS2_TRACE_COFF) {
printf("%s(%d): return -1\n", __FILE__, __LINE__);
}
return -1;
}
nscns = fhdr->f_nscns;
if ((nscns * sizeof(struct scnhdr)) > PAGE_SIZE) {
/*
* For now, return an error -- need to be able to
* read in all of the section structures.
*/
if (ibcs2_trace & IBCS2_TRACE_COFF) {
printf("%s(%d): return -1\n", __FILE__, __LINE__);
}
return -1;
}
ahdr = (struct aouthdr*)((char*)(iparams->image_header) +
sizeof(struct filehdr));
iparams->entry_addr = ahdr->entry;
scns = (struct scnhdr*)((char*)(iparams->image_header) +
sizeof(struct filehdr) +
sizeof(struct aouthdr));
if (error = exec_extract_strings(iparams)) {
if (ibcs2_trace & IBCS2_TRACE_COFF) {
printf("%s(%d): return %d\n", __FILE__, __LINE__, error);
}
return error;
}
exec_new_vmspace(iparams);
for (i = 0; i < nscns; i++) {
if (ibcs2_trace & IBCS2_TRACE_COFF) {
printf("i = %d, scns[i].s_name = %s, scns[i].s_vaddr = %08lx, "
"scns[i].s_scnptr = %d\n", i, scns[i].s_name,
scns[i].s_vaddr, scns[i].s_scnptr);
}
if (scns[i].s_flags & STYP_NOLOAD) {
/*
* A section that is not loaded, for whatever
* reason. It takes precedance over other flag
* bits...
*/
continue;
} else if (scns[i].s_flags & STYP_TEXT) {
text_address = scns[i].s_vaddr;
text_size = scns[i].s_size;
text_offset = scns[i].s_scnptr;
} else if (scns[i].s_flags & STYP_DATA) {
/* .data section */
data_address = scns[i].s_vaddr;
data_size = scns[i].s_size;
data_offset = scns[i].s_scnptr;
} else if (scns[i].s_flags & STYP_BSS) {
/* .bss section */
bss_size = scns[i].s_size;
} else if (scns[i].s_flags & STYP_LIB) {
char *buf = 0, *ptr;
int foff = trunc_page(scns[i].s_scnptr);
int off = scns[i].s_scnptr - foff;
int len = round_page(scns[i].s_size + PAGE_SIZE);
int j;
if (error = vm_mmap(kernel_map, &buf, len,
VM_PROT_READ, VM_PROT_READ, MAP_FILE,
iparams->vnodep, foff)) {
return ENOEXEC;
}
for (j = off; j < scns[i].s_size + off; j++) {
char *libname;
libname = buf + j + 4 * *(long*)(buf + j + 4);
j += 4* *(long*)(buf + j);
if (ibcs2_trace & IBCS2_TRACE_COFF) {
printf("%s(%d): shared library %s\n", __FILE__, __LINE__, libname);
}
error = coff_load_file(iparams->proc, libname);
if (error)
break;
}
if (vm_map_remove(kernel_map, buf, buf + len))
panic("exec_coff_imgact vm_map_remove failed");
if (error)
return error;
}
}
/*
* Map in .text now
*/
if (ibcs2_trace & IBCS2_TRACE_COFF) {
printf("%s(%d): load_coff_section(vmspace, "
"iparams->vnodep, %08lx, %08lx, 0x%x, 0x%x, 0x%x)\n",
__FILE__, __LINE__, text_offset, text_address,
text_size, text_size, VM_PROT_READ | VM_PROT_EXECUTE);
}
if (error = load_coff_section(vmspace, iparams->vnodep,
text_offset, (caddr_t)text_address,
text_size, text_size,
VM_PROT_READ | VM_PROT_EXECUTE)) {
if (ibcs2_trace & IBCS2_TRACE_COFF) {
printf("%s(%d): error = %d\n", __FILE__, __LINE__, error);
}
return error;
}
/*
* Map in .data and .bss now
*/
if (ibcs2_trace & IBCS2_TRACE_COFF) {
printf("%s(%d): load_coff_section(vmspace, "
"iparams->vnodep, 0x%08lx, 0x%08lx, 0x%x, 0x%x, 0x%x)\n",
__FILE__, __LINE__, data_offset, data_address,
data_size + bss_size, data_size, VM_PROT_ALL);
}
if (error = load_coff_section(vmspace, iparams->vnodep,
data_offset, (caddr_t)data_address,
data_size + bss_size, data_size,
VM_PROT_ALL)) {
if (ibcs2_trace & IBCS2_TRACE_COFF) {
printf("%s(%d): error = %d\n", __FILE__, __LINE__, error);
}
return error;
}
iparams->interpreted = 0;
iparams->proc->p_sysent = &ibcs2_svr3_sysvec;
vmspace->vm_tsize = round_page(text_size) >> PAGE_SHIFT;
vmspace->vm_dsize = round_page(data_size + bss_size) >> PAGE_SHIFT;
vmspace->vm_taddr = (caddr_t)text_address;
vmspace->vm_daddr = (caddr_t)data_address;
hole = (caddr_t)trunc_page(vmspace->vm_daddr) + ctob(vmspace->vm_dsize);
if (ibcs2_trace & IBCS2_TRACE_COFF) {
printf("%s(%d): vm_map_find(&vmspace->vm_map, NULL, 0, &0x%08lx, PAGE_SIZE, FALSE)\n",
__FILE__, __LINE__, hole);
printf("imgact: error = %d\n", error);
}
error = vm_map_find(&vmspace->vm_map, NULL, 0, &hole, PAGE_SIZE, FALSE);
if (ibcs2_trace & IBCS2_TRACE_COFF) {
printf("IBCS2: start vm_dsize = 0x%x, vm_daddr = 0x%x end = 0x%x\n",
ctob(vmspace->vm_dsize), vmspace->vm_daddr,
ctob(vmspace->vm_dsize) + vmspace->vm_daddr );
printf("%s(%d): returning successfully!\n", __FILE__, __LINE__);
}
return 0;
}
/*
* Tell kern_execve.c about it, with a little help from the linker.
* Since `const' objects end up in the text segment, TEXT_SET is the
* correct directive to use.
*/
const struct execsw coff_execsw = { exec_coff_imgact, "coff" };
TEXT_SET(execsw_set, coff_execsw);
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