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7286a7412503075163962110a71f9bb4d7b45069
[unix-history] / gnu / usr.bin / ld / i386 / md.h
/*
* Copyright (c) 1993 Paul Kranenburg
* 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.
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Paul Kranenburg.
* 4. 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: md.h,v 1.7 1994/01/03 18:35:36 davidg Exp $
*/
#if defined(CROSS_LINKER) && defined(XHOST) && XHOST==sparc
#define NEED_SWAP
#endif
#define MAX_ALIGNMENT (sizeof (long))
#ifdef NetBSD
#define PAGSIZ __LDPGSZ
#else
#define PAGSIZ 4096
#endif
#define N_SET_FLAG(ex,f) (netzmagic ? \
N_SETMAGIC_NET(ex,N_GETMAGIC_NET(ex), MID_MACHINE, \
N_GETFLAG_NET(ex)|(f)) : \
N_GETMAGIC(ex) == ZMAGIC ? \
N_SETMAGIC(ex,ZMAGIC,0,N_GETFLAG(ex)|(f)) : \
N_SETMAGIC(ex,N_GETMAGIC(ex), MID_MACHINE, \
N_GETFLAG(ex)|(f)))
#define N_IS_DYNAMIC(ex) ((N_GETMAGIC_NET(ex) == ZMAGIC) ? \
((N_GETFLAG_NET(ex) & EX_DYNAMIC)) : \
((N_GETFLAG(ex) & EX_DYNAMIC)))
/*
* Should be handled by a.out.h ?
*/
#define N_ADJUST(ex) (((ex).a_entry < PAGSIZ) ? -PAGSIZ : 0)
#define TEXT_START(ex) (N_TXTADDR(ex) + N_ADJUST(ex))
#define DATA_START(ex) (N_DATADDR(ex) + N_ADJUST(ex))
#define RELOC_STATICS_THROUGH_GOT_P(r) (0)
#define JMPSLOT_NEEDS_RELOC (0)
#define md_got_reloc(r) (0)
#define md_get_rt_segment_addend(r,a) md_get_addend(r,a)
/* Width of a Global Offset Table entry */
#define GOT_ENTRY_SIZE 4
typedef long got_t;
typedef struct jmpslot {
u_short opcode;
u_short addr[2];
u_short reloc_index;
#define JMPSLOT_RELOC_MASK 0xffff
} jmpslot_t;
#define NOP 0x90
#define CALL 0xe890 /* NOP + CALL opcode */
#define JUMP 0xe990 /* NOP + JMP opcode */
#define TRAP 0xcc /* INT 3 */
/*
* Byte swap defs for cross linking
*/
#if !defined(NEED_SWAP)
#define md_swapin_exec_hdr(h)
#define md_swapout_exec_hdr(h)
#define md_swapin_symbols(s,n)
#define md_swapout_symbols(s,n)
#define md_swapin_zsymbols(s,n)
#define md_swapout_zsymbols(s,n)
#define md_swapin_reloc(r,n)
#define md_swapout_reloc(r,n)
#define md_swapin_link_dynamic(l)
#define md_swapout_link_dynamic(l)
#define md_swapin_link_dynamic_2(l)
#define md_swapout_link_dynamic_2(l)
#define md_swapin_ld_debug(d)
#define md_swapout_ld_debug(d)
#define md_swapin_rrs_hash(f,n)
#define md_swapout_rrs_hash(f,n)
#define md_swapin_link_object(l,n)
#define md_swapout_link_object(l,n)
#define md_swapout_jmpslot(j,n)
#define md_swapout_got(g,n)
#define md_swapin_ranlib_hdr(h,n)
#define md_swapout_ranlib_hdr(h,n)
#endif /* NEED_SWAP */
#ifdef CROSS_LINKER
#ifdef NEED_SWAP
/* Define IO byte swapping routines */
void md_swapin_exec_hdr __P((struct exec *));
void md_swapout_exec_hdr __P((struct exec *));
void md_swapin_reloc __P((struct relocation_info *, int));
void md_swapout_reloc __P((struct relocation_info *, int));
void md_swapout_jmpslot __P((jmpslot_t *, int));
#define md_swapin_symbols(s,n) swap_symbols(s,n)
#define md_swapout_symbols(s,n) swap_symbols(s,n)
#define md_swapin_zsymbols(s,n) swap_zsymbols(s,n)
#define md_swapout_zsymbols(s,n) swap_zsymbols(s,n)
#define md_swapin_link_dynamic(l) swap_link_dynamic(l)
#define md_swapout_link_dynamic(l) swap_link_dynamic(l)
#define md_swapin_link_dynamic_2(l) swap_link_dynamic_2(l)
#define md_swapout_link_dynamic_2(l) swap_link_dynamic_2(l)
#define md_swapin_ld_debug(d) swap_ld_debug(d)
#define md_swapout_ld_debug(d) swap_ld_debug(d)
#define md_swapin_rrs_hash(f,n) swap_rrs_hash(f,n)
#define md_swapout_rrs_hash(f,n) swap_rrs_hash(f,n)
#define md_swapin_link_object(l,n) swapin_link_object(l,n)
#define md_swapout_link_object(l,n) swapout_link_object(l,n)
#define md_swapout_got(g,n) swap_longs((long*)(g),n)
#define md_swapin_ranlib_hdr(h,n) swap_ranlib_hdr(h,n)
#define md_swapout_ranlib_hdr(h,n) swap_ranlib_hdr(h,n)
#define md_swap_short(x) ( (((x) >> 8) & 0xff) | (((x) & 0xff) << 8) )
#define md_swap_long(x) ( (((x) >> 24) & 0xff ) | (((x) >> 8 ) & 0xff00 ) | \
(((x) << 8 ) & 0xff0000) | (((x) << 24) & 0xff000000))
#define get_byte(p) ( ((unsigned char *)(p))[0] )
#define get_short(p) ( ( ((unsigned char *)(p))[1] << 8) | \
( ((unsigned char *)(p))[0] ) \
)
#define get_long(p) ( ( ((unsigned char *)(p))[3] << 24) | \
( ((unsigned char *)(p))[2] << 16) | \
( ((unsigned char *)(p))[1] << 8 ) | \
( ((unsigned char *)(p))[0] ) \
)
#define put_byte(p, v) { ((unsigned char *)(p))[0] = ((unsigned long)(v)); }
#define put_short(p, v) { ((unsigned char *)(p))[1] = \
((((unsigned long)(v)) >> 8) & 0xff); \
((unsigned char *)(p))[0] = \
((((unsigned long)(v)) ) & 0xff); }
#define put_long(p, v) { ((unsigned char *)(p))[3] = \
((((unsigned long)(v)) >> 24) & 0xff); \
((unsigned char *)(p))[2] = \
((((unsigned long)(v)) >> 16) & 0xff); \
((unsigned char *)(p))[1] = \
((((unsigned long)(v)) >> 8) & 0xff); \
((unsigned char *)(p))[0] = \
((((unsigned long)(v)) ) & 0xff); }
#else /* We need not swap, but must pay attention to alignment: */
#define md_swap_short(x) (x)
#define md_swap_long(x) (x)
#define get_byte(p) ( ((unsigned char *)(p))[0] )
#define get_short(p) ( ( ((unsigned char *)(p))[0] << 8) | \
( ((unsigned char *)(p))[1] ) \
)
#define get_long(p) ( ( ((unsigned char *)(p))[0] << 24) | \
( ((unsigned char *)(p))[1] << 16) | \
( ((unsigned char *)(p))[2] << 8 ) | \
( ((unsigned char *)(p))[3] ) \
)
#define put_byte(p, v) { ((unsigned char *)(p))[0] = ((unsigned long)(v)); }
#define put_short(p, v) { ((unsigned char *)(p))[0] = \
((((unsigned long)(v)) >> 8) & 0xff); \
((unsigned char *)(p))[1] = \
((((unsigned long)(v)) ) & 0xff); }
#define put_long(p, v) { ((unsigned char *)(p))[0] = \
((((unsigned long)(v)) >> 24) & 0xff); \
((unsigned char *)(p))[1] = \
((((unsigned long)(v)) >> 16) & 0xff); \
((unsigned char *)(p))[2] = \
((((unsigned long)(v)) >> 8) & 0xff); \
((unsigned char *)(p))[3] = \
((((unsigned long)(v)) ) & 0xff); }
#endif /* NEED_SWAP */
#else /* Not a cross linker: use native */
#define md_swap_short(x) (x)
#define md_swap_long(x) (x)
#define get_byte(where) (*(char *)(where))
#define get_short(where) (*(short *)(where))
#define get_long(where) (*(long *)(where))
#define put_byte(where,what) (*(char *)(where) = (what))
#define put_short(where,what) (*(short *)(where) = (what))
#define put_long(where,what) (*(long *)(where) = (what))
#endif /* CROSS_LINKER */
Continuous source code history from original PDP-7 UNIX to FreeBSD 2, the first fully unencumbered FreeBSD release.