194 lines
5.8 KiB
C
194 lines
5.8 KiB
C
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/*
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* $Id: md.h,v 1.1 1993/10/16 21:53:15 pk Exp $ - I386 dependent definitions
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*/
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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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#define PAGSIZ 4096
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#define N_SET_FLAG(ex,f) N_SETMAGIC(ex,N_GETMAGIC(ex), MID_I386, N_GETFLAG(ex)|(f))
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#define N_IS_DYNAMIC(ex) ((N_GETFLAG(ex) & EX_DYNAMIC))
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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_link_dynamic(l)
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#define md_swapout_link_dynamic(l)
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#define md_swapin_link_dynamic_2(l)
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#define md_swapout_link_dynamic_2(l)
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#define md_swapin_ld_debug(d)
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#define md_swapout_ld_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_link_object(l,n)
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#define md_swapout_link_object(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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#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_link_dynamic(l) swap_link_dynamic(l)
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#define md_swapout_link_dynamic(l) swap_link_dynamic(l)
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#define md_swapin_link_dynamic_2(l) swap_link_dynamic_2(l)
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#define md_swapout_link_dynamic_2(l) swap_link_dynamic_2(l)
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#define md_swapin_ld_debug(d) swap_ld_debug(d)
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#define md_swapout_ld_debug(d) swap_ld_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_link_object(l,n) swapin_link_object(l,n)
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#define md_swapout_link_object(l,n) swapout_link_object(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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#define get_byte(p) ( ((unsigned char *)(p))[0] )
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#define get_short(p) ( ( ((unsigned char *)(p))[1] << 8) | \
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( ((unsigned char *)(p))[0] ) \
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)
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#define get_long(p) ( ( ((unsigned char *)(p))[3] << 24) | \
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( ((unsigned char *)(p))[2] << 16) | \
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( ((unsigned char *)(p))[1] << 8 ) | \
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( ((unsigned char *)(p))[0] ) \
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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))[1] = \
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((((unsigned long)(v)) >> 8) & 0xff); \
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((unsigned char *)(p))[0] = \
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((((unsigned long)(v)) ) & 0xff); }
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#define put_long(p, v) { ((unsigned char *)(p))[3] = \
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((((unsigned long)(v)) >> 24) & 0xff); \
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((unsigned char *)(p))[2] = \
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((((unsigned long)(v)) >> 16) & 0xff); \
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((unsigned char *)(p))[1] = \
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((((unsigned long)(v)) >> 8) & 0xff); \
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((unsigned char *)(p))[0] = \
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((((unsigned long)(v)) ) & 0xff); }
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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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#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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#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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