/* * $OpenBSD: md.h,v 1.2 2000/02/01 21:01:40 espie Exp $*/ /* * - m68k dependent definitions */ #if defined(CROSS_LINKER) #include #if BYTE_ORDER != BIG_ENDIAN #define NEED_SWAP #endif #undef MID_MACHINE /* XXX */ #define MID_MACHINE 151 #endif #define MAX_ALIGNMENT (sizeof (double)) #define PAGSIZ 0x1000 #undef __LDPGSZ #define __LDPGSZ 0x1000 #define N_SET_FLAG(ex,f) N_SETMAGIC(ex,N_GETMAGIC(ex), MID_MACHINE, \ N_GETFLAG(ex)|(f)) #define N_IS_DYNAMIC(ex) ((N_GETFLAG(ex) & EX_DYNAMIC)) #define N_BADMID(ex) \ (N_GETMID(ex) != 0 && N_GETMID(ex) != MID_MACHINE && \ !md_midcompat(&(ex))) /* * 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 TEXT_START(ex) (N_TXTADDR(ex)) #define DATA_START(ex) (N_DATADDR(ex) + N_ADJUST(ex)) #define RELOC_STATICS_THROUGH_GOT_P(r) (1) #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; #if 1 /* NOT REALLY */ #define NOP 0x4e71 #define BSRL 0x61ff /* BSR opcode with long offset */ #define BRAL 0x60ff /* BRA opcode with long offset */ #define BPT 0x4e42 /* breakpoint trap: trap #2 */ #endif /* m88k */ enum reloc_type { RELOC_LO16, /* lo16(sym) */ RELOC_HI16, /* hi16(sym) */ RELOC_PC16, /* bb0, bb1, bcnd */ RELOC_PC26, /* br, bsr */ RELOC_32, /* jump tables, etc */ RELOC_IW16, /* global access through linker regs 28 */ NO_RELOC, RELOC_GLOB_DAT, RELOC_JMP_SLOT, RELOC_RELATIVE }; #if 0 struct relocation_info_m88k { unsigned int r_address; /* offset in text or data segment */ unsigned int r_symbolnum : 24, /* ordinal number of add symbol */ r_extern : 1, /* 1 if need to add symbol to value */ r_baserel : 1, r_pcrel : 1, r_jmptable : 1, r_type : 4; int r_addend; }; #endif struct r_relocation_info_m88k { unsigned int r_address; /* offset in text or data segment */ unsigned int r_type : 4, r_jmptable : 1, r_pcrel : 1, r_baserel : 1, r_extern : 1, /* 1 if need to add symbol to value */ r_symbolnum : 24; /* ordinal number of add symbol */ int r_addend; }; #undef relocation_info #define relocation_info relocation_info_m88k /* * 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) md_in_reloc(r,n) #define md_swapout_reloc(r,n) #define md_swapin__dynamic(l) #define md_swapout__dynamic(l) #define md_swapin_section_dispatch_table(l) #define md_swapout_section_dispatch_table(l) #define md_swapin_so_debug(d) #define md_swapout_so_debug(d) #define md_swapin_rrs_hash(f,n) #define md_swapout_rrs_hash(f,n) #define md_swapin_sod(l,n) #define md_swapout_sod(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 #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); } #define put_b26(p, v) { ((unsigned char *)(p))[0] = \ ((((unsigned long)(v)) >> 24) & 0x03 | \ ((unsigned char *)(p))[0] & 0xfc); \ ((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); } #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__dynamic(l) swap__dynamic(l) #define md_swapout__dynamic(l) swap__dynamic(l) #define md_swapin_section_dispatch_table(l) swap_section_dispatch_table(l) #define md_swapout_section_dispatch_table(l) swap_section_dispatch_table(l) #define md_swapin_so_debug(d) swap_so_debug(d) #define md_swapout_so_debug(d) swap_so_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_sod(l,n) swapin_sod(l,n) #define md_swapout_sod(l,n) swapout_sod(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)) #else /* We need not swap, but must pay attention to alignment: */ #define md_swap_short(x) (x) #define md_swap_long(x) (x) #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)) #define put_b26(where, what) (*(long *)(where) = ((*(long *)(where))\ & ~0x03ffffff) | ((what) & 0x03ffffff)) #endif /* CROSS_LINKER */ #if 0 #define RELOC_ADDRESS(r) ((r)->r_address) #define RELOC_EXTERN_P(r) ((r)->r_extern) #define RELOC_TYPE(r) ((r)->r_symbolnum) #define RELOC_SYMBOL(r) ((r)->r_symbolnum) #define RELOC_MEMORY_SUB_P(r) 0 #define RELOC_MEMORY_ADD_P(r) 1 #undef RELOC_ADD_EXTRA #define RELOC_PCREL_P(r) ((r)->r_pcrel) #define RELOC_VALUE_RIGHTSHIFT(r) 0 #if defined(RTLD) && defined(SUN_COMPAT) #define RELOC_TARGET_SIZE(r) (2) /* !!!!! Sun BUG compatible */ #else #define RELOC_TARGET_SIZE(r) ((r)->r_length) #endif #define RELOC_TARGET_BITPOS(r) 0 #define RELOC_TARGET_BITSIZE(r) 32 #define RELOC_JMPTAB_P(r) ((r)->r_jmptable) #define RELOC_BASEREL_P(r) ((r)->r_baserel) #define RELOC_RELATIVE_P(r) ((r)->r_relative) #define RELOC_COPY_P(r) ((r)->r_copy) #define RELOC_LAZY_P(r) ((r)->r_jmptable) #define CHECK_GOT_RELOC(r) (0) #endif