aafb797228
libraries to come out as 1-byte relocations instead of 4-byte relocations. Submitted by: Doug Rabson <dfr@nlsystems.com>
246 lines
8.1 KiB
C
246 lines
8.1 KiB
C
/*
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* Copyright (c) 1993 Paul Kranenburg
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Paul Kranenburg.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $Id: md.h,v 1.16 1997/02/22 15:46:34 peter Exp $
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*/
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#ifndef __MD_H__
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#define __MD_H__
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#if defined(CROSS_LINKER) && defined(XHOST) && XHOST==sparc
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#define NEED_SWAP
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#endif
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#define MAX_ALIGNMENT (sizeof (long))
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#ifdef NetBSD
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#define PAGSIZ __LDPGSZ
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#else
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#define PAGSIZ 4096
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#endif
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#if defined(NetBSD) || defined(CROSS_LINKER)
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#define N_SET_FLAG(ex,f) (oldmagic || N_GETMAGIC(ex)==QMAGIC ? (0) : \
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N_SETMAGIC(ex, \
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N_GETMAGIC(ex), \
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MID_MACHINE, \
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N_GETFLAG(ex)|(f)))
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#define N_IS_DYNAMIC(ex) ((N_GETFLAG(ex) & EX_DYNAMIC))
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#define N_BADMID(ex) \
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(N_GETMID(ex) != 0 && N_GETMID(ex) != MID_MACHINE)
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#endif
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/*
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* FreeBSD does it differently
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*/
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#ifdef __FreeBSD__
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#define N_SET_FLAG(ex,f) (oldmagic ? (0) : \
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(netzmagic == 0 ? \
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N_SETMAGIC(ex, \
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N_GETMAGIC(ex), \
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MID_MACHINE, \
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N_GETFLAG(ex)|(f)) : \
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N_SETMAGIC_NET(ex, \
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N_GETMAGIC_NET(ex), \
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MID_MACHINE, \
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N_GETFLAG_NET(ex)|(f)) ))
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#define N_IS_DYNAMIC(ex) ((N_GETMAGIC_NET(ex) == ZMAGIC) ? \
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((N_GETFLAG_NET(ex) & EX_DYNAMIC)) : \
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((N_GETFLAG(ex) & EX_DYNAMIC) ))
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#define N_BADMID(ex) 0
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#endif
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/*
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* Should be handled by a.out.h ?
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*/
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#define N_ADJUST(ex) (((ex).a_entry < PAGSIZ) ? -PAGSIZ : 0)
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#define TEXT_START(ex) (N_TXTADDR(ex) + N_ADJUST(ex))
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#define DATA_START(ex) (N_DATADDR(ex) + N_ADJUST(ex))
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#define RELOC_STATICS_THROUGH_GOT_P(r) (0)
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#define JMPSLOT_NEEDS_RELOC (0)
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#define md_got_reloc(r) (0)
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#define md_get_rt_segment_addend(r,a) md_get_addend(r,a)
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#define RELOC_INIT_SEGMENT_RELOC(r) ((r)->r_length = 2)
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/* Width of a Global Offset Table entry */
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#define GOT_ENTRY_SIZE 4
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typedef long got_t;
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typedef struct jmpslot {
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u_short opcode;
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u_short addr[2];
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u_short reloc_index;
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#define JMPSLOT_RELOC_MASK 0xffff
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} jmpslot_t;
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#define NOP 0x90
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#define CALL 0xe890 /* NOP + CALL opcode */
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#define JUMP 0xe990 /* NOP + JMP opcode */
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#define TRAP 0xcc /* INT 3 */
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/*
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* Byte swap defs for cross linking
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*/
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#if !defined(NEED_SWAP)
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#define md_swapin_exec_hdr(h)
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#define md_swapout_exec_hdr(h)
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#define md_swapin_symbols(s,n)
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#define md_swapout_symbols(s,n)
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#define md_swapin_zsymbols(s,n)
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#define md_swapout_zsymbols(s,n)
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#define md_swapin_reloc(r,n)
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#define md_swapout_reloc(r,n)
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#define md_swapin__dynamic(l)
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#define md_swapout__dynamic(l)
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#define md_swapin_section_dispatch_table(l)
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#define md_swapout_section_dispatch_table(l)
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#define md_swapin_so_debug(d)
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#define md_swapout_so_debug(d)
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#define md_swapin_rrs_hash(f,n)
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#define md_swapout_rrs_hash(f,n)
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#define md_swapin_sod(l,n)
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#define md_swapout_sod(l,n)
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#define md_swapout_jmpslot(j,n)
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#define md_swapout_got(g,n)
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#define md_swapin_ranlib_hdr(h,n)
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#define md_swapout_ranlib_hdr(h,n)
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#endif /* NEED_SWAP */
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#ifdef CROSS_LINKER
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#define get_byte(p) ( ((unsigned char *)(p))[0] )
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#define get_short(p) ( ( ((unsigned char *)(p))[0] << 8) | \
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( ((unsigned char *)(p))[1] ) \
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)
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#define get_long(p) ( ( ((unsigned char *)(p))[0] << 24) | \
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( ((unsigned char *)(p))[1] << 16) | \
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( ((unsigned char *)(p))[2] << 8 ) | \
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( ((unsigned char *)(p))[3] ) \
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)
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#define put_byte(p, v) { ((unsigned char *)(p))[0] = ((unsigned long)(v)); }
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#define put_short(p, v) { ((unsigned char *)(p))[0] = \
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((((unsigned long)(v)) >> 8) & 0xff); \
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((unsigned char *)(p))[1] = \
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((((unsigned long)(v)) ) & 0xff); }
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#define put_long(p, v) { ((unsigned char *)(p))[0] = \
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((((unsigned long)(v)) >> 24) & 0xff); \
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((unsigned char *)(p))[1] = \
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((((unsigned long)(v)) >> 16) & 0xff); \
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((unsigned char *)(p))[2] = \
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((((unsigned long)(v)) >> 8) & 0xff); \
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((unsigned char *)(p))[3] = \
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((((unsigned long)(v)) ) & 0xff); }
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#ifdef NEED_SWAP
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/* Define IO byte swapping routines */
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void md_swapin_exec_hdr __P((struct exec *));
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void md_swapout_exec_hdr __P((struct exec *));
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void md_swapin_reloc __P((struct relocation_info *, int));
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void md_swapout_reloc __P((struct relocation_info *, int));
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void md_swapout_jmpslot __P((jmpslot_t *, int));
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#define md_swapin_symbols(s,n) swap_symbols(s,n)
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#define md_swapout_symbols(s,n) swap_symbols(s,n)
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#define md_swapin_zsymbols(s,n) swap_zsymbols(s,n)
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#define md_swapout_zsymbols(s,n) swap_zsymbols(s,n)
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#define md_swapin__dynamic(l) swap__dynamic(l)
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#define md_swapout__dynamic(l) swap__dynamic(l)
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#define md_swapin_section_dispatch_table(l) swap_section_dispatch_table(l)
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#define md_swapout_section_dispatch_table(l) swap_section_dispatch_table(l)
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#define md_swapin_so_debug(d) swap_so_debug(d)
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#define md_swapout_so_debug(d) swap_so_debug(d)
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#define md_swapin_rrs_hash(f,n) swap_rrs_hash(f,n)
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#define md_swapout_rrs_hash(f,n) swap_rrs_hash(f,n)
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#define md_swapin_sod(l,n) swapin_sod(l,n)
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#define md_swapout_sod(l,n) swapout_sod(l,n)
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#define md_swapout_got(g,n) swap_longs((long*)(g),n)
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#define md_swapin_ranlib_hdr(h,n) swap_ranlib_hdr(h,n)
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#define md_swapout_ranlib_hdr(h,n) swap_ranlib_hdr(h,n)
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#define md_swap_short(x) ( (((x) >> 8) & 0xff) | (((x) & 0xff) << 8) )
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#define md_swap_long(x) ( (((x) >> 24) & 0xff ) | (((x) >> 8 ) & 0xff00 ) | \
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(((x) << 8 ) & 0xff0000) | (((x) << 24) & 0xff000000))
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#else /* We need not swap, but must pay attention to alignment: */
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#define md_swap_short(x) (x)
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#define md_swap_long(x) (x)
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#endif /* NEED_SWAP */
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#else /* Not a cross linker: use native */
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#define md_swap_short(x) (x)
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#define md_swap_long(x) (x)
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#define get_byte(where) (*(char *)(where))
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#define get_short(where) (*(short *)(where))
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#define get_long(where) (*(long *)(where))
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#define put_byte(where,what) (*(char *)(where) = (what))
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#define put_short(where,what) (*(short *)(where) = (what))
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#define put_long(where,what) (*(long *)(where) = (what))
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#endif /* CROSS_LINKER */
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void md_init_header __P((struct exec *, int, int));
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long md_get_addend __P((struct relocation_info *, unsigned char *));
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void md_relocate __P((struct relocation_info *, long, unsigned char *, int));
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void md_make_jmpslot __P((jmpslot_t *, long, long));
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void md_fix_jmpslot __P((jmpslot_t *, long, u_long));
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void md_bind_jmpslot __P((u_long, caddr_t));
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int md_make_reloc __P((struct relocation_info *, struct relocation_info *, int));
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void md_make_jmpreloc __P((struct relocation_info *, struct relocation_info *, int));
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void md_make_gotreloc __P((struct relocation_info *, struct relocation_info *, int));
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void md_make_copyreloc __P((struct relocation_info *, struct relocation_info *));
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void md_set_breakpoint __P((long, long *));
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#endif /* __MD_H__ */
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