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  • Committer: Phil Dennis-Jordan
  • Date: 2017-07-21 08:03:43 UTC
  • mfrom: (1.1.1)
  • Revision ID: phil@philjordan.eu-20170721080343-2yr2vdj7713czahv
New upstream release 2.9.0.

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roms/SLOF/slof/fs/elf.fs
 
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\ *****************************************************************************
 
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\ * Copyright (c) 2004, 2011 IBM Corporation
 
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\ * All rights reserved.
 
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\ * This program and the accompanying materials
 
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\ * are made available under the terms of the BSD License
 
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\ * which accompanies this distribution, and is available at
 
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\ * http://www.opensource.org/licenses/bsd-license.php
 
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\ *
 
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\ * Contributors:
 
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\ *     IBM Corporation - initial implementation
 
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\ ****************************************************************************/
 
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\ Claim memory for segment
 
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\ Abort, if no memory available
 
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false value elf-claim?
 
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0     value last-claim
 
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\ cur-brk is set by elf loader to end of data segment
 
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0 VALUE cur-brk
 
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: elf-claim-segment ( addr size -- errorcode )
 
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   2dup
 
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   elf-claim? IF
 
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      >r
 
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      here last-claim , to last-claim                \ Setup ptr to last claim
 
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      \ Put addr and size in the data space
 
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      dup , r> dup , ( addr size )
 
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      0 ['] claim CATCH IF
 
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         ." Memory for ELF file is already in use!" cr
 
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         true ABORT" Memory for ELF file already in use "
 
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      THEN
 
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      drop
 
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   ELSE
 
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      2drop
 
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   THEN
 
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   + to cur-brk
 
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   0 
 
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;
 
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\ Load ELF file and claim the corresponding memory regions.
 
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\ A destination address can be specified. If the parameter is -1 then
 
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\ the file is loaded to the ddress that is specified in its header.
 
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: elf-load-claim ( file-addr destaddr -- claim-list entry imagetype )
 
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   true to elf-claim?
 
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   0 to last-claim
 
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   dup -1 = IF             \ If destaddr == -1 then load to addr from ELF header
 
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      drop ['] elf-load-file CATCH IF false to elf-claim? ABORT THEN
 
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   ELSE
 
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      ['] elf-load-file-to-addr CATCH IF false to elf-claim? ABORT THEN
 
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   THEN
 
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   >r
 
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   last-claim swap
 
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   false to elf-claim?
 
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   r>
 
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;
 
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\ Release memory claimed before
 
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: elf-release ( claim-list -- )
 
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   BEGIN
 
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      dup cell+                   ( claim-list claim-list-addr )
 
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      dup @ swap cell+ @          ( claim-list claim-list-addr claim-list-sz )
 
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      release                     ( claim-list )
 
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      @ dup 0=                    ( Next-element )
 
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   UNTIL
 
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   drop
 
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;