mirror of
https://github.com/xcat2/xNBA.git
synced 2024-12-14 07:11:32 +00:00
Mostly updated. Won't work yet.
This commit is contained in:
Michael Brown
parent
644f3674e6
commit
3bdbfe1f00
@ -1,11 +1,10 @@
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#warning "This file is obsolete"
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#if 0
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#include "memsizes.h"
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#include "realmode.h"
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#include "gateA20.h"
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#include "etherboot.h"
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#include "errno.h"
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#include <errno.h>
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#include <assert.h>
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#include <realmode.h>
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#include <gateA20.h>
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#include <gpxe/uaccess.h>
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#include <gpxe/segment.h>
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#include <gpxe/image.h>
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/** @file
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*
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@ -22,6 +21,8 @@
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*
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*/
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struct image_type nbi_image_type __image_type ( PROBE_NORMAL );
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/**
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* An NBI image header
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*
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@ -82,206 +83,185 @@ struct segheader {
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#define NBI_LOADADDR_BEFORE 0x03
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#define NBI_LAST_SEGHEADER(flags) ( (flags) & ( 1 << 2 ) )
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/* Define a type for passing info to a loaded program */
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struct ebinfo {
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uint8_t major, minor; /* Version */
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uint16_t flags; /* Bit flags */
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};
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/** Info passed to NBI image */
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static struct ebinfo loaderinfo = {
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VERSION_MAJOR, VERSION_MINOR,
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0
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};
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/**
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* Determine whether or not this is a valid NBI image
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*
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* @v start Address of the image
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* @v len Length of the image
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* @v context NBI image context
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* @ret True Image is a valid NBI image
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* @ret False Image is not a valid NBI image
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* @err ENOEXEC Image is not a valid NBI image
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*
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* "context" is filled in with a context pointer suitable for passing to
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* nbi_load() and nbi_boot().
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*
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*/
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static int nbi_probe ( physaddr_t start, off_t len, void **context ) {
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static struct imgheader imgheader;
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if ( (unsigned)len < sizeof ( imgheader ) ) {
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DBG ( "NBI image too small\n" );
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errno = ENOEXEC;
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return 0;
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}
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copy_from_phys ( &imgheader, start, sizeof ( imgheader ) );
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if ( imgheader.magic != NBI_MAGIC ) {
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errno = ENOEXEC;
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return 0;
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}
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/* Record image context */
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DBG ( "NBI found valid image\n" );
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*context = &imgheader;
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return 1;
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}
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/**
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* Prepare a segment for an NBI image
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*
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* @v dest Address of segment
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* @v imglen Length of initialised-data portion of the segment
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* @v memlen Total length of the segment
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* @v image NBI image
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* @v offset Offset within NBI image
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* @v filesz Length of initialised-data portion of the segment
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* @v memsz Total length of the segment
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* @v src Source for initialised data
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* @ret True Segment can be used
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* @ret False Segment cannot be used
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* @err other As returned by prep_segment()
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*
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* @ret rc Return status code
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*/
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static int nbi_prepare_segment ( physaddr_t dest, off_t imglen, off_t memlen,
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physaddr_t src __unused ) {
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DBG ( "NBI preparing segment [%x,%x) (imglen %d memlen %d)\n",
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dest, dest + memlen, imglen, memlen );
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return prep_segment ( dest, dest + imglen, dest + memlen );
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static int nbi_prepare_segment ( struct image *image, size_t offset __unused,
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userptr_t dest, size_t filesz, size_t memsz ){
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int rc;
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if ( ( rc = prep_segment ( dest, filesz, memsz ) ) != 0 ) {
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DBGC ( image, "NBI %p could not prepare segment: %s\n",
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image, strerror ( rc ) );
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return rc;
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}
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return 0;
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}
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/**
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* Load a segment for an NBI image
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*
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* @v dest Address of segment
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* @v imglen Length of initialised-data portion of the segment
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* @v memlen Total length of the segment
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* @v image NBI image
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* @v offset Offset within NBI image
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* @v filesz Length of initialised-data portion of the segment
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* @v memsz Total length of the segment
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* @v src Source for initialised data
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* @ret True Always
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*
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* @ret rc Return status code
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*/
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static int nbi_load_segment ( physaddr_t dest, off_t imglen,
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off_t memlen __unused, physaddr_t src ) {
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DBG ( "NBI loading segment [%x,%x)\n", dest, dest + imglen );
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copy_phys_to_phys ( dest, src, imglen );
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return 1;
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static int nbi_load_segment ( struct image *image, size_t offset,
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userptr_t dest, size_t filesz,
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size_t memsz __unused ) {
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memcpy_user ( dest, 0, image->data, offset, filesz );
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return 0;
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}
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/**
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* Process segments of an NBI image
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*
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* @v start Address of the image
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* @v len Length of the image
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* @v image NBI image
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* @v imgheader Image header information
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* @v process Function to call for each segment
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* @ret True All segments were processed successfully
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* @ret False An error occurred processing a segment
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* @err ENOEXEC Image is not a valid NBI image
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* @err other As returned by the "process" function
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*
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* @ret rc Return status code
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*/
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static int nbi_process_segments ( physaddr_t start, off_t len,
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static int nbi_process_segments ( struct image *image,
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struct imgheader *imgheader,
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int ( * process ) ( physaddr_t dest,
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off_t imglen,
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off_t memlen,
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physaddr_t src ) ) {
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int ( * process ) ( struct image *image,
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size_t offset,
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userptr_t dest,
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size_t filesz,
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size_t memsz ) ) {
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struct segheader sh;
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off_t offset = 0;
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off_t sh_off;
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physaddr_t dest;
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off_t dest_imglen, dest_memlen;
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size_t offset = 0;
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size_t sh_off;
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userptr_t dest;
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size_t filesz;
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size_t memsz;
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int rc;
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/* Copy header to target location */
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dest = ( ( imgheader->location.segment << 4 ) +
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imgheader->location.offset );
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dest_imglen = dest_memlen = NBI_HEADER_LENGTH;
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if ( ! process ( dest, dest_imglen, dest_memlen, start + offset ) )
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return 0;
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offset += dest_imglen;
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/* Copy image header to target location */
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dest = real_to_user ( imgheader->location.segment,
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imgheader->location.offset );
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filesz = memsz = NBI_HEADER_LENGTH;
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if ( ( rc = process ( image, offset, dest, filesz, memsz ) ) != 0 )
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return rc;
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offset += filesz;
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/* Process segments in turn */
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sh_off = NBI_LENGTH ( imgheader->length );
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do {
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/* Read segment header */
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copy_from_phys ( &sh, start + sh_off, sizeof ( sh ) );
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copy_from_user ( &sh, image->data, sh_off, sizeof ( sh ) );
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if ( sh.length == 0 ) {
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/* Avoid infinite loop? */
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DBG ( "NBI invalid segheader length 0\n" );
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errno = ENOEXEC;
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return 0;
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DBGC ( image, "NBI %p invalid segheader length 0\n",
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image );
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return -ENOEXEC;
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}
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/* Calculate segment load address */
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switch ( NBI_LOADADDR_FLAGS ( sh.flags ) ) {
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case NBI_LOADADDR_ABS:
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dest = sh.loadaddr;
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dest = phys_to_user ( sh.loadaddr );
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break;
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case NBI_LOADADDR_AFTER:
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dest = dest + dest_memlen + sh.loadaddr;
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dest = userptr_add ( dest, memsz + sh.loadaddr );
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break;
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case NBI_LOADADDR_BEFORE:
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dest = dest - sh.loadaddr;
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dest = userptr_add ( dest, -sh.loadaddr );
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break;
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case NBI_LOADADDR_END:
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/* Not correct according to the spec, but
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* maintains backwards compatibility with
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* previous versions of Etherboot.
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*/
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dest = ( meminfo.memsize * 1024 + 0x100000UL )
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- sh.loadaddr;
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dest = phys_to_user ( ( extmemsize() + 1024 ) * 1024
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- sh.loadaddr );
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break;
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default:
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/* Cannot be reached */
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DBG ( "NBI can't count up to three!\n" );
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assert ( 0 );
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}
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/* Process this segment */
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dest_imglen = sh.imglength;
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dest_memlen = sh.memlength;
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if ( ! process ( dest, dest_imglen, dest_memlen,
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start + offset ) )
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return 0;
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offset += dest_imglen;
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filesz = sh.imglength;
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memsz = sh.memlength;
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if ( ( offset + filesz ) > image->len ) {
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DBGC ( image, "NBI %p segment outside file\n", image );
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return -ENOEXEC;
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}
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if ( ( rc = process ( image, offset, dest,
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filesz, memsz ) ) != 0 ) {
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return rc;
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}
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offset += filesz;
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/* Next segheader */
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sh_off += NBI_LENGTH ( sh.length );
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if ( sh_off >= NBI_HEADER_LENGTH ) {
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DBG ( "NBI header overflow\n" );
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errno = ENOEXEC;
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return 0;
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DBGC ( image, "NBI %p header overflow\n", image );
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return -ENOEXEC;
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}
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} while ( ! NBI_LAST_SEGHEADER ( sh.flags ) );
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if ( offset != len ) {
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DBG ( "NBI length mismatch (file %d, metadata %d)\n",
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len, offset );
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errno = ENOEXEC;
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return 0;
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if ( offset != image->len ) {
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DBGC ( image, "NBI %p length wrong (file %d, metadata %d)\n",
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image, image->len, offset );
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return -ENOEXEC;
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}
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return 1;
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return 0;
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}
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/**
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* Load an NBI image into memory
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*
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* @v start Address of image
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* @v len Length of image
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* @v context NBI context (as returned by nbi_probe())
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* @ret True Image loaded into memory
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* @ret False Image not loaded into memory
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* @err ENOEXEC Image is not a valid NBI image
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* @err other As returned by nbi_process_segments()
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* @err other As returned by nbi_prepare_segment()
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* @err other As returned by nbi_load_segment()
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*
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* @v image NBI image
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* @ret rc Return status code
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*/
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static int nbi_load ( physaddr_t start, off_t len, void *context ) {
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struct imgheader *imgheader = context;
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int nbi_load ( struct image *image ) {
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struct imgheader imgheader;
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int rc;
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/* If we don't have enough data give up */
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if ( len < NBI_HEADER_LENGTH ) {
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errno = ENOEXEC;
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return 0;
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if ( image->len < NBI_HEADER_LENGTH ) {
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DBGC ( image, "NBI %p too short for an NBI image\n", image );
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return -ENOEXEC;
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}
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DBG ( "NBI placing header at %hx:%hx\n",
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imgheader->location.segment, imgheader->location.offset );
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/* Check image header */
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copy_from_user ( &imgheader, image->data, 0, sizeof ( imgheader ) );
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if ( imgheader.magic != NBI_MAGIC ) {
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DBGC ( image, "NBI %p has no NBI signature\n", image );
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return -ENOEXEC;
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}
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/* This is an NBI image, valid or otherwise */
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if ( ! image->type )
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image->type = &nbi_image_type;
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DBGC ( image, "NBI %p placing header at %hx:%hx\n", image,
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imgheader.location.segment, imgheader.location.offset );
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/* NBI files can have overlaps between segments; the bss of
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* one segment may overlap the initialised data of another. I
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@ -290,14 +270,14 @@ static int nbi_load ( physaddr_t start, off_t len, void *context ) {
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* passes: first to initialise the segments, then to copy the
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* data. This avoids zeroing out already-copied data.
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*/
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if ( ! nbi_process_segments ( start, len, imgheader,
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nbi_prepare_segment ) )
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return 0;
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if ( ! nbi_process_segments ( start, len, imgheader,
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nbi_load_segment ) )
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return 0;
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if ( ( rc = nbi_process_segments ( image, &imgheader,
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nbi_prepare_segment ) ) != 0 )
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return rc;
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if ( ( rc = nbi_process_segments ( image, &imgheader,
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nbi_load_segment ) ) != 0 )
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return rc;
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return 1;
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return 0;
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}
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/**
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@ -309,40 +289,34 @@ static int nbi_load ( physaddr_t start, off_t len, void *context ) {
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* @err ECANCELED NBI program returned
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*
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*/
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static int nbi_boot16 ( struct imgheader *imgheader ) {
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uint16_t basemem_bootp;
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static int nbi_boot16 ( struct image *image, struct imgheader *imgheader ) {
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int discard_D, discard_S, discard_b;
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DBG ( "NBI executing 16-bit image at %hx:%hx\n",
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imgheader->execaddr.segoff.segment,
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imgheader->execaddr.segoff.offset );
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DBGC ( image, "NBI %p executing 16-bit image at %04x:%04x\n", image,
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imgheader->execaddr.segoff.segment,
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imgheader->execaddr.segoff.offset );
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gateA20_unset();
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basemem_bootp = BASEMEM_PARAMETER_INIT ( bootp_data );
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REAL_EXEC ( rm_xstart16,
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"pushw %%ds\n\t" /* far pointer to bootp data copy */
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"pushw %%bx\n\t"
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"pushl %%esi\n\t" /* location */
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"pushw %%cs\n\t" /* lcall execaddr */
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"call 1f\n\t"
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"jmp 2f\n\t"
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"\n1:\n\t"
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"pushl %%edi\n\t"
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"lret\n\t"
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"\n2:\n\t"
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"addw $8,%%sp\n\t", /* pop location and bootp ptr */
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3,
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OUT_CONSTRAINTS ( "=D" ( discard_D ), "=S" ( discard_S ),
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"=b" ( discard_b ) ),
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IN_CONSTRAINTS ( "D" ( imgheader->execaddr.segoff ),
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"S" ( imgheader->location ),
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"b" ( basemem_bootp ) ),
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CLOBBER ( "eax", "ecx", "edx", "ebp" ) );
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BASEMEM_PARAMETER_DONE ( bootp_data );
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#warning "Should be providing bootp data"
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__asm__ __volatile__ (
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REAL_CODE ( "pushw %%ds\n\t" /* far pointer to bootp data */
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"pushw %%bx\n\t"
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"pushl %%esi\n\t" /* location */
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"pushw %%cs\n\t" /* lcall execaddr */
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"call 1f\n\t"
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"jmp 2f\n\t"
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"\n1:\n\t"
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"pushl %%edi\n\t"
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"lret\n\t"
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"\n2:\n\t"
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"addw $8,%%sp\n\t" /* clean up stack */ )
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: "=D" ( discard_D ), "=S" ( discard_S ), "=b" ( discard_b )
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: "D" ( imgheader->execaddr.segoff ),
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"S" ( imgheader->location ), "b" ( 0 /* bootp data */ )
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: "eax", "ecx", "edx", "ebp" );
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errno = ECANCELED;
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return 0;
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return -ECANCELED;
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}
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|
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/**
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@ -359,57 +333,56 @@ static int nbi_boot16 ( struct imgheader *imgheader ) {
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* have returned.
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*
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*/
|
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static int nbi_boot32 ( struct imgheader *imgheader ) {
|
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int rc = 0;
|
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static int nbi_boot32 ( struct image *image, struct imgheader *imgheader ) {
|
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int rc;
|
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|
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DBG ( "NBI executing 32-bit image at %x\n",
|
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imgheader->execaddr.linear );
|
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DBGC ( image, "NBI %p executing 32-bit image at %lx\n",
|
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image, imgheader->execaddr.linear );
|
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|
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/* no gateA20_unset for PM call */
|
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errno = ENOERR;
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#warning "Should be providing bootp data"
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#warning "xstart32 no longer exists"
|
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#if 0
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rc = xstart32 ( imgheader->execaddr.linear,
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virt_to_phys ( &loaderinfo ),
|
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( ( imgheader->location.segment << 4 ) +
|
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imgheader->location.offset ),
|
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virt_to_phys ( &bootp_data ) );
|
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printf ( "Secondary program returned %d\n", rc );
|
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0 /* bootp data */ );
|
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#endif
|
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|
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DBGC ( image, "NBI %p returned %d\n", image, rc );
|
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|
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if ( ! NBI_PROGRAM_RETURNS ( imgheader->flags ) ) {
|
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/* We shouldn't have returned */
|
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errno = ECANCELED;
|
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rc = 0;
|
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rc = -ECANCELED;
|
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}
|
||||
|
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return rc;
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}
|
||||
|
||||
/**
|
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* Boot a loaded NBI image
|
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*
|
||||
* @v context NBI context (as returned by nbi_probe())
|
||||
* @ret Never NBI program booted successfully
|
||||
* @ret False NBI program should not have returned
|
||||
* @ret other As returned by NBI program
|
||||
* @err ECANCELED NBI program should not have returned
|
||||
*
|
||||
* See also nbi_boot16() and nbi_boot32().
|
||||
* Execute a loaded NBI image
|
||||
*
|
||||
* @v image NBI image
|
||||
* @ret rc Return status code
|
||||
*/
|
||||
static int nbi_boot ( void *context ) {
|
||||
struct imgheader *imgheader = context;
|
||||
static int nbi_exec ( struct image *image ) {
|
||||
struct imgheader imgheader;
|
||||
|
||||
if ( NBI_LINEAR_EXEC_ADDR ( imgheader->flags ) ) {
|
||||
return nbi_boot32 ( imgheader );
|
||||
copy_from_user ( &imgheader, phys_to_user ( image->entry ), 0,
|
||||
sizeof ( imgheader ) );
|
||||
|
||||
if ( NBI_LINEAR_EXEC_ADDR ( imgheader.flags ) ) {
|
||||
return nbi_boot32 ( image, &imgheader );
|
||||
} else {
|
||||
return nbi_boot16 ( imgheader );
|
||||
return nbi_boot16 ( image, &imgheader );
|
||||
}
|
||||
}
|
||||
|
||||
/** Declaration of the NBI image format */
|
||||
struct image nbi_image __image = {
|
||||
.name = "NBI",
|
||||
.probe = nbi_probe,
|
||||
.load = nbi_load,
|
||||
.boot = nbi_boot,
|
||||
/** NBI image type */
|
||||
struct image_type nbi_image_type __image_type ( PROBE_NORMAL ) = {
|
||||
.name = "NBI",
|
||||
.load = nbi_load,
|
||||
.exec = nbi_exec,
|
||||
};
|
||||
|
||||
#endif
|
||||
|
||||
Loading…
Reference in New Issue
Block a user