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COFF's /sbin/osloader

This commit is contained in:
msaitoh 2000-03-20 21:24:54 +00:00
parent 36af21fa48
commit c5d98a393d
4 changed files with 727 additions and 2 deletions
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4
sys/arch/mmeye/stand/Makefile
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@ -1,5 +1,5 @@
# $NetBSD: Makefile,v 1.1 1999/09/13 10:31:04 itojun Exp $
# $NetBSD: Makefile,v 1.2 2000/03/20 21:24:54 msaitoh Exp $
SUBDIR= bootelf
SUBDIR= bootelf bootcoff
.include <bsd.subdir.mk>

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sys/arch/mmeye/stand/bootcoff/Makefile Normal file
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# $NetBSD: Makefile,v 1.1 2000/03/20 21:24:55 msaitoh Exp $
PROG= osloader
SRCS= osloader.c
NOMAN=
.include <bsd.prog.mk>

583
sys/arch/mmeye/stand/bootcoff/osloader.c Normal file
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/*********************************************************************
* NetBSD(SH3) boot loader
*
* 1998.11.10
* By T.Horiuchi (Brains, Corp.)
*********************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <sys/param.h>
#include <sys/gmon.h>
#include <sys/stat.h>
#include <sys/sysctl.h>
#include <sys/socket.h>
#include <sys/file.h>
#include <vm/vm_param.h>
#include <machine/cpu.h>
#include "osloader.h"
#define vm_page_size (1<<12)
char *netbsd = "/netbsd";
struct coff_filehdr FileHdr;
struct coff_aouthdr AoutHdr;
static int coff_find_section __P((FILE *, struct coff_filehdr *,
struct coff_scnhdr *, int));
void LoadAndReset __P((char *));
/*
* coff_find_section - load specified section header
*
* TODO - optimize by reading all section headers in at once
*/
static int
coff_find_section( fd, fp, sh, s_type)
FILE *fd;
struct coff_filehdr *fp;
struct coff_scnhdr *sh;
int s_type;
{
int i, pos, siz;
pos = COFF_HDR_SIZE;
for (i = 0; i < fp->f_nscns; i++, pos += sizeof(struct coff_scnhdr)) {
siz = sizeof(struct coff_scnhdr);
if( fread(sh, 1, siz, fd ) != siz ){
perror("osloader");
exit( 1 );
}
if (sh->s_flags == s_type)
return 0;
}
return -1;
}
void
LoadAndReset( char *osimage )
{
int mib[2];
u_long val;
int len;
mib[0] = CTL_MACHDEP;
mib[1] = CPU_LOADANDRESET;
val = (u_long)osimage;
len = sizeof( val );
sysctl(mib, 2, NULL, NULL, &val, len);
}
int
main(int argc, char *argv[] )
{
FILE *fp;
int error;
long dsize;
struct coff_scnhdr sh;
u_long ep_taddr;
u_long ep_tsize;
u_long toffset;
u_long ep_daddr;
u_long ep_dsize;
u_long doffset;
char *osimage;
char *p;
int i;
u_long cksum;
u_long size;
#if 0
printf("osloader: start\n");
#endif
fp = fopen( netbsd, "r" );
if( fp == NULL ){
perror("osloader");
exit( 1 );
}
if( fread( &FileHdr, 1, sizeof( FileHdr ), fp ) != sizeof(FileHdr)){
perror("osloader");
exit( 1 );
}
if(fread( &AoutHdr, 1, sizeof( AoutHdr ), fp ) != sizeof(AoutHdr)){
perror("osloader");
exit( 1 );
}
/* set up command for text segment */
error = coff_find_section(fp, &FileHdr, &sh, COFF_STYP_TEXT);
if (error) {
printf("can't find text section: %d\n", error);
exit( 1 );
}
ep_taddr = COFF_ALIGN(sh.s_vaddr);
toffset = sh.s_scnptr - (sh.s_vaddr - ep_taddr);
ep_tsize = sh.s_size + (sh.s_vaddr - ep_taddr);
printf("VMCMD: addr %lx size 0x%lx offset 0x%lx\n", ep_taddr,
ep_tsize, toffset);
/* set up command for data segment */
error = coff_find_section(fp, &FileHdr, &sh, COFF_STYP_DATA);
if (error) {
printf("can't find data section: %d\n", error);
exit( 1 );
}
ep_daddr = COFF_ALIGN(sh.s_vaddr);
doffset = sh.s_scnptr - (sh.s_vaddr - ep_daddr);
dsize = sh.s_size + (sh.s_vaddr - ep_daddr);
ep_dsize = round_page(dsize) + AoutHdr.a_bsize;
printf("VMCMD: addr 0x%lx size 0x%lx offset 0x%lx\n", ep_daddr,
dsize, doffset);
osimage = malloc( ep_tsize+dsize+sizeof(u_long)*2 );
if( osimage == NULL){
printf("osloader:no memory\n");
exit( 1 );
}
*(u_long *)osimage = ep_tsize+dsize;
p = osimage + 2*sizeof( u_long );
/* load text area */
fseek( fp, toffset, SEEK_SET );
if( fread(p, 1, ep_tsize, fp) != ep_tsize ){
perror("osloader:");
exit( 1 );
}
/* load data area */
fseek( fp, doffset, SEEK_SET );
if( fread(p+ep_daddr-ep_taddr, 1, dsize, fp) != dsize ){
perror("osloader:");
exit( 1 );
}
fclose( fp );
cksum = 0;
size = (ep_tsize + dsize) >> 2;
for( i = 0; i < size; i++){
cksum += *(u_long *)p;
p += sizeof(u_long );
}
*(u_long *)(osimage+sizeof(u_long)) = cksum ;
#if 0
printf("osimage = %p\n", osimage );
#endif
LoadAndReset( osimage );
return (0); /* NOT REACHED */
}
#ifdef NOTDEF
/*
* exec_coff_makecmds(): Check if it's an coff-format executable.
*
* Given a proc pointer and an exec package pointer, see if the referent
* of the epp is in coff format. Check 'standard' magic numbers for
* this architecture. If that fails, return failure.
*
* This function 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_coff_makecmds(p, epp)
struct proc *p;
struct exec_package *epp;
{
int error;
struct coff_filehdr *fp = epp->ep_hdr;
struct coff_aouthdr *ap;
if (epp->ep_hdrvalid < COFF_HDR_SIZE)
return ENOEXEC;
if (COFF_BADMAG(fp))
return ENOEXEC;
ap = epp->ep_hdr + sizeof(struct coff_filehdr);
switch (ap->a_magic) {
case COFF_OMAGIC:
error = exec_coff_prep_omagic(p, epp, fp, ap);
break;
case COFF_NMAGIC:
error = exec_coff_prep_nmagic(p, epp, fp, ap);
break;
case COFF_ZMAGIC:
error = exec_coff_prep_zmagic(p, epp, fp, ap);
break;
default:
return ENOEXEC;
}
#ifdef TODO
if (error == 0)
error = cpu_exec_coff_hook(p, epp );
#endif
if (error)
kill_vmcmds(&epp->ep_vmcmds);
return error;
}
/*
* exec_coff_setup_stack(): Set up the stack segment for a coff
* executable.
*
* Note that the ep_ssize parameter must be set to be the current stack
* limit; this is adjusted in the body of execve() to yield the
* appropriate stack segment usage once the argument length is
* calculated.
*
* This function returns an int for uniformity with other (future) formats'
* stack setup functions. They might have errors to return.
*/
int
exec_coff_setup_stack(p, epp)
struct proc *p;
struct exec_package *epp;
{
/* DPRINTF(("enter exec_coff_setup_stack\n")); */
epp->ep_maxsaddr = USRSTACK - MAXSSIZ;
epp->ep_minsaddr = USRSTACK;
epp->ep_ssize = p->p_rlimit[RLIMIT_STACK].rlim_cur;
/*
* set up commands for stack. note that this takes *two*, one to
* map the part of the stack which we can access, and one to map
* the part which we can't.
*
* arguably, it could be made into one, but that would require the
* addition of another mapping proc, which is unnecessary
*
* note that in memory, things assumed to be: 0 ....... ep_maxsaddr
* <stack> ep_minsaddr
*/
/* DPRINTF(("VMCMD: addr %x size %d\n", epp->ep_maxsaddr,
(epp->ep_minsaddr - epp->ep_ssize) - epp->ep_maxsaddr)); */
NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero,
((epp->ep_minsaddr - epp->ep_ssize) - epp->ep_maxsaddr),
epp->ep_maxsaddr, NULLVP, 0, VM_PROT_NONE);
/* DPRINTF(("VMCMD: addr %x size %d\n",
epp->ep_minsaddr - epp->ep_ssize,
epp->ep_ssize)); */
NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, epp->ep_ssize,
(epp->ep_minsaddr - epp->ep_ssize), NULLVP, 0,
VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
return 0;
}
/*
* exec_coff_prep_omagic(): Prepare a COFF OMAGIC binary's exec package
*/
int
exec_coff_prep_omagic(p, epp, fp, ap)
struct proc *p;
struct exec_package *epp;
struct coff_filehdr *fp;
struct coff_aouthdr *ap;
{
epp->ep_taddr = COFF_SEGMENT_ALIGN(ap, ap->a_tstart);
epp->ep_tsize = ap->a_tsize;
epp->ep_daddr = COFF_SEGMENT_ALIGN(ap, ap->a_dstart);
epp->ep_dsize = ap->a_dsize;
epp->ep_entry = ap->a_entry;
/* set up command for text and data segments */
NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn,
ap->a_tsize + ap->a_dsize, epp->ep_taddr, epp->ep_vp,
COFF_TXTOFF(fp, ap),
VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
/* set up command for bss segment */
#ifdef sh3
if (ap->a_bsize > 0)
NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, ap->a_bsize,
COFF_ROUND(ap->a_dstart + ap->a_dsize, COFF_LDPGSZ),
NULLVP, 0,
VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
#else
if (ap->a_bsize > 0)
NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, ap->a_bsize,
COFF_SEGMENT_ALIGN(ap, ap->a_dstart + ap->a_dsize),
NULLVP, 0,
VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
#endif
return exec_coff_setup_stack(p, epp);
}
/*
* exec_coff_prep_nmagic(): Prepare a 'native' NMAGIC COFF binary's exec
* package.
*/
int
exec_coff_prep_nmagic(p, epp, fp, ap)
struct proc *p;
struct exec_package *epp;
struct coff_filehdr *fp;
struct coff_aouthdr *ap;
{
epp->ep_taddr = COFF_SEGMENT_ALIGN(ap, ap->a_tstart);
epp->ep_tsize = ap->a_tsize;
epp->ep_daddr = COFF_ROUND(ap->a_dstart, COFF_LDPGSZ);
epp->ep_dsize = ap->a_dsize;
epp->ep_entry = ap->a_entry;
/* set up command for text segment */
NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, epp->ep_tsize,
epp->ep_taddr, epp->ep_vp, COFF_TXTOFF(fp, ap),
VM_PROT_READ|VM_PROT_EXECUTE);
/* set up command for data segment */
NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, epp->ep_dsize,
epp->ep_daddr, epp->ep_vp, COFF_DATOFF(fp, ap),
VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
/* set up command for bss segment */
if (ap->a_bsize > 0)
NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, ap->a_bsize,
COFF_SEGMENT_ALIGN(ap, ap->a_dstart + ap->a_dsize),
NULLVP, 0,
VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
return exec_coff_setup_stack(p, epp);
}
/*
* coff_find_section - load specified section header
*
* TODO - optimize by reading all section headers in at once
*/
static int
coff_find_section(p, vp, fp, sh, s_type)
struct proc *p;
struct vnode *vp;
struct coff_filehdr *fp;
struct coff_scnhdr *sh;
int s_type;
{
int i, pos, resid, siz, error;
pos = COFF_HDR_SIZE;
for (i = 0; i < fp->f_nscns; i++, pos += sizeof(struct coff_scnhdr)) {
siz = sizeof(struct coff_scnhdr);
error = vn_rdwr(UIO_READ, vp, (caddr_t) sh,
siz, pos, UIO_SYSSPACE, IO_NODELOCKED, p->p_ucred,
&resid, p);
if (error) {
DPRINTF(("section hdr %d read error %d\n", i, error));
return error;
}
siz -= resid;
if (siz != sizeof(struct coff_scnhdr)) {
DPRINTF(("incomplete read: hdr %d ask=%d, rem=%d got %d\n",
s_type, sizeof(struct coff_scnhdr),
resid, siz));
return ENOEXEC;
}
/* DPRINTF(("found section: %x\n", sh->s_flags)); */
if (sh->s_flags == s_type)
return 0;
}
return ENOEXEC;
}
/*
* exec_coff_prep_zmagic(): Prepare a COFF ZMAGIC binary's exec package
*
* First, set 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
exec_coff_prep_zmagic(p, epp, fp, ap)
struct proc *p;
struct exec_package *epp;
struct coff_filehdr *fp;
struct coff_aouthdr *ap;
{
int error;
u_long offset;
long dsize;
#ifndef sh3
long baddr, bsize;
#endif
struct coff_scnhdr sh;
/* DPRINTF(("enter exec_coff_prep_zmagic\n")); */
/* set up command for text segment */
error = coff_find_section(p, epp->ep_vp, fp, &sh, COFF_STYP_TEXT);
if (error) {
DPRINTF(("can't find text section: %d\n", error));
return error;
}
/* DPRINTF(("COFF text addr %x size %d offset %d\n", sh.s_vaddr,
sh.s_size, sh.s_scnptr)); */
epp->ep_taddr = COFF_ALIGN(sh.s_vaddr);
offset = sh.s_scnptr - (sh.s_vaddr - epp->ep_taddr);
epp->ep_tsize = sh.s_size + (sh.s_vaddr - epp->ep_taddr);
#ifdef notyet
/*
* 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 ((ap->a_tsize != 0 || ap->a_dsize != 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;
}
epp->ep_vp->v_flag |= VTEXT;
#endif
/* DPRINTF(("VMCMD: addr %x size %d offset %d\n", epp->ep_taddr,
epp->ep_tsize, offset)); */
#ifdef notyet
NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_pagedvn, epp->ep_tsize,
epp->ep_taddr, epp->ep_vp, offset,
VM_PROT_READ|VM_PROT_EXECUTE);
#else
NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, epp->ep_tsize,
epp->ep_taddr, epp->ep_vp, offset,
VM_PROT_READ|VM_PROT_EXECUTE);
#endif
/* set up command for data segment */
error = coff_find_section(p, epp->ep_vp, fp, &sh, COFF_STYP_DATA);
if (error) {
DPRINTF(("can't find data section: %d\n", error));
return error;
}
/* DPRINTF(("COFF data addr %x size %d offset %d\n", sh.s_vaddr,
sh.s_size, sh.s_scnptr)); */
epp->ep_daddr = COFF_ALIGN(sh.s_vaddr);
offset = sh.s_scnptr - (sh.s_vaddr - epp->ep_daddr);
dsize = sh.s_size + (sh.s_vaddr - epp->ep_daddr);
#ifdef sh3
epp->ep_dsize = round_page(dsize) + ap->a_bsize;
#else
epp->ep_dsize = dsize + ap->a_bsize;
#endif
/* DPRINTF(("VMCMD: addr %x size %d offset %d\n", epp->ep_daddr,
dsize, offset)); */
#ifdef notyet
NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_pagedvn, dsize,
epp->ep_daddr, epp->ep_vp, offset,
VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
#else
NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn,
dsize, epp->ep_daddr, epp->ep_vp, offset,
VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
#endif
#ifdef sh3
if (ap->a_bsize > 0){
NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, ap->a_bsize,
COFF_ROUND(ap->a_dstart + ap->a_dsize, COFF_LDPGSZ),
NULLVP, 0,
VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
}
#else
/* set up command for bss segment */
baddr = round_page(epp->ep_daddr + dsize);
bsize = epp->ep_daddr + epp->ep_dsize - baddr;
if (bsize > 0) {
/* DPRINTF(("VMCMD: addr %x size %d offset %d\n",
baddr, bsize, 0)); */
NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero,
bsize, baddr, NULLVP, 0,
VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
}
#endif
#ifdef TODO
/* load any shared libraries */
error = coff_find_section(p, epp->ep_vp, fp, &sh, COFF_STYP_SHLIB);
if (!error) {
int resid;
struct coff_slhdr *slhdr;
char buf[128], *bufp; /* FIXME */
int len = sh.s_size, path_index, entry_len;
/* DPRINTF(("COFF shlib size %d offset %d\n",
sh.s_size, sh.s_scnptr)); */
error = vn_rdwr(UIO_READ, epp->ep_vp, (caddr_t) buf,
len, sh.s_scnptr,
UIO_SYSSPACE, IO_NODELOCKED, p->p_ucred,
&resid, p);
if (error) {
DPRINTF(("shlib section read error %d\n", error));
return ENOEXEC;
}
bufp = buf;
while (len) {
slhdr = (struct coff_slhdr *)bufp;
path_index = slhdr->path_index * sizeof(long);
entry_len = slhdr->entry_len * sizeof(long);
/* DPRINTF(("path_index: %d entry_len: %d name: %s\n",
path_index, entry_len, slhdr->sl_name)); */
error = coff_load_shlib(p, slhdr->sl_name, epp);
if (error)
return ENOEXEC;
bufp += entry_len;
len -= entry_len;
}
}
#endif
/* set up entry point */
epp->ep_entry = ap->a_entry;
#if 0
DPRINTF(("text addr: %x size: %d data addr: %x size: %d entry: %x\n",
epp->ep_taddr, epp->ep_tsize,
epp->ep_daddr, epp->ep_dsize,
epp->ep_entry));
#endif
return exec_coff_setup_stack(p, epp);
}
#endif /* NOTDEF */

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sys/arch/mmeye/stand/bootcoff/osloader.h Normal file
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#ifndef _OSLOADER_H_
#define _OSLOADER_H_
#include <sys/types.h>
/*
* COFF file header
*/
struct coff_filehdr {
u_short f_magic; /* magic number */
u_short f_nscns; /* # of sections */
long f_timdat; /* timestamp */
long f_symptr; /* file offset of symbol table */
long f_nsyms; /* # of symbol table entries */
u_short f_opthdr; /* size of optional header */
u_short f_flags; /* flags */
};
/* f_magic flags */
#define COFF_MAGIC_SH3 0x500
/* f_flags */
#define COFF_F_RELFLG 0x1
#define COFF_F_EXEC 0x2
#define COFF_F_LNNO 0x4
#define COFF_F_LSYMS 0x8
#define COFF_F_SWABD 0x40
#define COFF_F_AR16WR 0x80
#define COFF_F_AR32WR 0x100
/*
* COFF system header
*/
struct coff_aouthdr {
short a_magic;
short a_vstamp;
long a_tsize;
long a_dsize;
long a_bsize;
long a_entry;
long a_tstart;
long a_dstart;
};
/* magic */
#define COFF_OMAGIC 0444 /* text not write-protected; data seg
is contiguous with text */
#define COFF_NMAGIC 0410 /* text is write-protected; data starts
at next seg following text */
#define COFF_ZMAGIC 0000 /* text and data segs are aligned for
direct paging */
#define COFF_SMAGIC 0443 /* shared lib */
/*
* COFF section header
*/
struct coff_scnhdr {
char s_name[8];
long s_paddr;
long s_vaddr;
long s_size;
long s_scnptr;
long s_relptr;
long s_lnnoptr;
u_short s_nreloc;
u_short s_nlnno;
long s_flags;
};
/* s_flags */
#define COFF_STYP_REG 0x00
#define COFF_STYP_DSECT 0x01
#define COFF_STYP_NOLOAD 0x02
#define COFF_STYP_GROUP 0x04
#define COFF_STYP_PAD 0x08
#define COFF_STYP_COPY 0x10
#define COFF_STYP_TEXT 0x20
#define COFF_STYP_DATA 0x40
#define COFF_STYP_BSS 0x80
#define COFF_STYP_INFO 0x200
#define COFF_STYP_OVER 0x400
#define COFF_STYP_SHLIB 0x800
/*
* COFF shared library header
*/
struct coff_slhdr {
long entry_len; /* in words */
long path_index; /* in words */
char sl_name[1];
};
#define COFF_ROUND(val, by) (((val) + by - 1) & ~(by - 1))
#define COFF_ALIGN(a) ((a) & ~(COFF_LDPGSZ - 1))
#define COFF_HDR_SIZE \
(sizeof(struct coff_filehdr) + sizeof(struct coff_aouthdr))
#define COFF_BLOCK_ALIGN(ap, value) \
(ap->a_magic == COFF_ZMAGIC ? COFF_ROUND(value, COFF_LDPGSZ) : \
value)
#define COFF_TXTOFF(fp, ap) \
(ap->a_magic == COFF_ZMAGIC ? 0 : \
COFF_ROUND(COFF_HDR_SIZE + fp->f_nscns * \
sizeof(struct coff_scnhdr), COFF_SEGMENT_ALIGNMENT(ap)))
#define COFF_DATOFF(fp, ap) \
(COFF_BLOCK_ALIGN(ap, COFF_TXTOFF(fp, ap) + ap->a_tsize))
#define COFF_SEGMENT_ALIGN(ap, value) \
(COFF_ROUND(value, (ap->a_magic == COFF_ZMAGIC ? COFF_LDPGSZ : \
COFF_SEGMENT_ALIGNMENT(ap))))
#define COFF_LDPGSZ 4096
#define COFF_SEGMENT_ALIGNMENT(ap) 4
#define COFF_BADMAG(ex) (ex->f_magic != COFF_MAGIC_SH3)
#define IBCS2_HIGH_SYSCALL(n) (((n) & 0x7f) == 0x28)
#define IBCS2_CVT_HIGH_SYSCALL(n) (((n) >> 8) + 128)
#ifdef DEBUG_COFF
#define DPRINTF(a) printf a;
#else
#define DPRINTF(a)
#endif
#endif /* !_OSLOADER_H_ */