/* $NetBSD: md.h,v 1.2 1997/10/17 21:25:54 mark Exp $ */ /* * Copyright (c) 1997 Mark Brinicombe * Copyright (c) 1997 Causality Limited * 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. * This product includes software developed by Causality Limited * 4. The name of the author may not be used to endorse or promote products * derived from this software without 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. */ /* Second cut for arm32 */ #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) (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) != MID_MACHINE) /* * Should be handled by a.out.h ? */ #define N_ADJUST(ex) (((ex).a_entry < PAGSIZ) ? -PAGSIZ : 0) #ifdef __notyet__ #define TEXT_START(ex) (N_TXTADDR(ex) + N_ADJUST(ex)) #define DATA_START(ex) (N_DATADDR(ex) + N_ADJUST(ex)) #else #define TEXT_START(ex) ((ex).a_entry < PAGSIZ ? 0 : 0x001000) #define DATA_START(ex) (N_GETMAGIC(ex) == OMAGIC \ ? TEXT_START(ex) + (ex).a_text \ : (TEXT_START(ex) + (ex).a_text + __LDPGSZ - 1) & ~(__LDPGSZ - 1)) #endif #define RELOC_STATICS_THROUGH_GOT_P(r) (1) #define JMPSLOT_NEEDS_RELOC (1) #define md_got_reloc(r) (-r->r_address) #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_long opcode1; /* ldr ip, [pc] */ u_long opcode2; /* add pc, pc, ip */ u_long address; /* binder/function address */ u_long reloc_index; /* relocation index */ #define JMPSLOT_RELOC_MASK 0xffffffff } jmpslot_t; #define SAVEPC 0xe1a0c00e /* MOV ip, lr */ #define CALL 0xeb000000 /* CALL opcode */ #define JUMP 0xe59ff000 /* LDR pc, [pc] (used as JMP) */ #define TRAP 0xe6000011 /* Undefined Instruction (used for bpt) */ #define GETSLOTADDR 0xe04fc00c /* sub ip, pc, ip */ #define ADDPC 0xe08ff00c /* add pc, pc, ip */ #define LDRPCADDR 0xe51ff004 /* ldr pc, [pc, #-4] */ #define GETRELADDR 0xe59fc000 /* ldr ip, [pc] */ void md_swapin_reloc __P((struct relocation_info *, int)); void md_swapout_reloc __P((struct relocation_info *, int)); /* * 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__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); } #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_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)) #endif /* CROSS_LINKER */ /* * Define all the RELOC_ macros */ #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) ((r)->r_neg) not used */ #define RELOC_MEMORY_ADD_P(r) 1 #undef RELOC_ADD_EXTRA #define RELOC_PCREL_P(r) (((r)->r_pcrel == 1) ^ ((r)->r_length == 3)) #define RELOC_VALUE_RIGHTSHIFT(r) 0 /*#define RELOC_TARGET_SIZE(r) ((r)->r_length) not used */ /*#define RELOC_TARGET_BITPOS(r) 0 not used */ /*#define RELOC_TARGET_BITSIZE(r) 32 not used */ #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) (0) #define RELOC_LAZY_P(r) ((r)->r_jmptable) /*#define CHECK_GOT_RELOC(r) RELOC_PCREL_P(r)*/ #define CHECK_GOT_RELOC(r) (((r)->r_pcrel == 1) && ((r)->r_length == 2)) /* * Define the range of usable Global Offset Table offsets * when using arm LDR instructions with 12 bit offset (-4092 -> 4092); * this is the case if the object files are compiles with -fpic'. * IF a "large" model is used (i.e. -fPIC'), .word instructions * are generated instead providing 32-bit addressability of the GOT table. */ #define MAX_GOTOFF(t) ((t) == PIC_TYPE_SMALL ? 4092 : LONG_MAX) #define MIN_GOTOFF(t) ((t) == PIC_TYPE_SMALL ? -4092 : LONG_MIN) #define RELOC_PIC_TYPE(r) ((r)->r_baserel ? \ ((r)->r_length == 1 ? \ PIC_TYPE_SMALL : \ PIC_TYPE_LARGE) : \ PIC_TYPE_NONE) #define RELOC_INIT_SEGMENT_RELOC(r)