262 lines
9.0 KiB
C
262 lines
9.0 KiB
C
/* $NetBSD: md.h,v 1.4 2000/05/28 01:53:05 matt Exp $ */
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/*
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* Copyright (c) 1997 Mark Brinicombe
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* Copyright (c) 1997 Causality Limited
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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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* This product includes software developed by Causality Limited
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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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/* Second cut for arm32 */
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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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#define N_SET_FLAG(ex,f) (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) (N_GETMID(ex) != MID_MACHINE)
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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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#ifdef __notyet__
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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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#else
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#define TEXT_START(ex) ((ex).a_entry < PAGSIZ ? 0 : 0x001000)
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#define DATA_START(ex) (N_GETMAGIC(ex) == OMAGIC \
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? TEXT_START(ex) + (ex).a_text \
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: (TEXT_START(ex) + (ex).a_text + __LDPGSZ - 1) & ~(__LDPGSZ - 1))
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#endif
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#define RELOC_STATICS_THROUGH_GOT_P(r) (1)
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#define JMPSLOT_NEEDS_RELOC (1)
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#define JMPSLOT_NONEXTERN_IS_INTERMODULE (0)
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#define md_got_reloc(r) (-r->r_address)
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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_long opcode1; /* ldr ip, [pc] */
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u_long opcode2; /* add pc, pc, ip */
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u_long address; /* binder/function address */
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u_long reloc_index; /* relocation index */
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#define JMPSLOT_RELOC_MASK 0xffffffff
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} jmpslot_t;
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#define SAVEPC 0xe1a0c00e /* MOV ip, lr */
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#define CALL 0xeb000000 /* CALL opcode */
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#define JUMP 0xe59ff000 /* LDR pc, [pc] (used as JMP) */
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#define TRAP 0xe6000011 /* Undefined Instruction (used for bpt) */
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#define GETSLOTADDR 0xe04fc00c /* sub ip, pc, ip */
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#define ADDPC 0xe08ff00c /* add pc, pc, ip */
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#define LDRPCADDR 0xe51ff004 /* ldr pc, [pc, #-4] */
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#define GETRELADDR 0xe59fc000 /* ldr ip, [pc] */
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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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/*
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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__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_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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/*
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* Define all the RELOC_ macros
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*/
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#define RELOC_ADDRESS(r) ((r)->r_address)
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#define RELOC_EXTERN_P(r) ((r)->r_extern)
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#define RELOC_TYPE(r) ((r)->r_symbolnum)
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#define RELOC_SYMBOL(r) ((r)->r_symbolnum)
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/* #define RELOC_MEMORY_SUB_P(r) ((r)->r_neg) not used */
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#define RELOC_MEMORY_ADD_P(r) 1
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#undef RELOC_ADD_EXTRA
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#define RELOC_PCREL_P(r) (((r)->r_pcrel == 1) ^ ((r)->r_length == 3))
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#define RELOC_VALUE_RIGHTSHIFT(r) 0
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/*#define RELOC_TARGET_SIZE(r) ((r)->r_length) not used */
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/*#define RELOC_TARGET_BITPOS(r) 0 not used */
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/*#define RELOC_TARGET_BITSIZE(r) 32 not used */
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#define RELOC_JMPTAB_P(r) ((r)->r_jmptable)
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#define RELOC_BASEREL_P(r) ((r)->r_baserel)
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#define RELOC_RELATIVE_P(r) ((r)->r_relative)
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#define RELOC_COPY_P(r) (0)
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#define RELOC_LAZY_P(r) ((r)->r_jmptable)
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/*#define CHECK_GOT_RELOC(r) RELOC_PCREL_P(r)*/
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#define CHECK_GOT_RELOC(r) (((r)->r_pcrel == 1) && ((r)->r_length == 2))
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/*
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* Define the range of usable Global Offset Table offsets
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* when using arm LDR instructions with 12 bit offset (-4092 -> 4092);
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* this is the case if the object files are compiles with -fpic'.
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* IF a "large" model is used (i.e. -fPIC'), .word instructions
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* are generated instead providing 32-bit addressability of the GOT table.
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*/
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#define MAX_GOTOFF(t) ((t) == PIC_TYPE_SMALL ? 4092 : LONG_MAX)
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#define MIN_GOTOFF(t) ((t) == PIC_TYPE_SMALL ? -4092 : LONG_MIN)
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#define RELOC_PIC_TYPE(r) ((r)->r_baserel ? \
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((r)->r_length == 1 ? \
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PIC_TYPE_SMALL : \
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PIC_TYPE_LARGE) : \
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PIC_TYPE_NONE)
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#define RELOC_INIT_SEGMENT_RELOC(r)
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