d3c677c7e0
nonempty string, then function calls are relocated at program start-up rather than lazily. This variable is standard on Sun and SVR4 systems. The dlopen() function now supports both lazy and immediate binding, as determined by its "mode" argument, which can be either 1 (RTLD_LAZY) or 2 (RTLD_NOW). I will add defines of these symbols to <dlfcn.h> as soon as I've done a little more checking to make sure they won't cause collisions or bootstrapping problems that would break "make world".
244 lines
8.0 KiB
C
244 lines
8.0 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 1.13 1996/10/01 01:27:58 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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/* 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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