xref: /openbsd/libexec/ld.so/powerpc/archdep.h (revision c6ba0247)

/*	$OpenBSD: archdep.h,v 1.2 2000/10/01 00:54:35 rahnds Exp $ */

/*
 * Copyright (c) 1998 Per Fogelstrom, Opsycon AB
 *
 * 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 under OpenBSD by
 *	Per Fogelstrom, Opsycon AB, Sweden.
 * 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.
 *
 */

#ifndef _POWERPC_ARCHDEP_H_
#define _POWERPC_ARCHDEP_H_

#define	DL_MALLOC_ALIGN	4	/* Arch constraint or otherwise */

#define	MACHID	EM_PPC	/* ELF e_machine ID value checked */

#define	RELTYPE	Elf32_Rela
#define	RELSIZE	sizeof(Elf32_Rela)

#include <elf_abi.h>
#include <machine/reloc.h>

/* HACK */
#define DT_PROCNUM 0
#ifndef DT_BIND_NOW
#define DT_BIND_NOW 0
#endif

/*
 *	Simple reloc of REL32's. Used by bootstrapping.
 */
#define	SIMPLE_RELOC(r, s, p, v)					\
	if(ELF32_R_TYPE((r)->r_info) == RELOC_32) {			\
		if((ELF32_ST_BIND((s)->st_info) == STB_LOCAL) &&	\
		   (ELF32_ST_TYPE((s)->st_info) == STT_SECTION ||	\
		    ELF32_ST_TYPE((s)->st_info) == STT_NOTYPE) ) {	\
			*(p) += (v);					\
		}							\
		else {							\
			*(p) = (v) + (s)->st_value;			\
		}							\
	}

/*
 *	The following functions are declared inline so they can
 *	be used before bootstrap linking has been finished.
 */
static inline void
_dl_dcbf(Elf32_Addr *addr)
{
  __asm__ volatile ("dcbst 0, %0\n\t"
		    "sync\n\t"
		    "icbi 0, %0\n\t"
		    "sync\n\t"
		    "isync"
                    : : "r" (addr) : "0");
}

static inline int _dl_write (int fd, const char* buf, int len);
static inline void
_dl_wrstderr(const char *s)
{
	while(*s) {
		_dl_write(2, s, 1);
		s++;
	}
}

static inline void *
_dl_memset(void *p, const char v, size_t c)
{
	char *ip = p;

	while(c--)
		*ip++ = v;
	return(p);
}

static inline int
_dl_strlen(const char *p)
{
	const char *s = p;

	while(*s != '\0')
		s++;
	return(s - p);
}

static inline char *
_dl_strcpy(char *d, const char *s)
{
	char *rd = d;

	while((*d++ = *s++) != '\0');

	return(rd);
}

static inline int
_dl_strncmp(const char *d, const char *s, int c)
{
	while(c-- && *d && *d++ == *s++) {};
	if(c < 0) {
		return(0);
	}
	return(d[-1] - s[-1]);
}

static inline int
_dl_strcmp(const char *d, const char *s)
{
	while(*d && *d++ == *s++) {};
	return(d[-1] - s[-1]);
}

static inline const char *
_dl_strchr(const char *p, const int c)
{
	while(*p) {
		if(*p == c) {
			return(p);
		}
		p++;
	}
	return(0);
}

static inline void
RELOC_RELA(Elf32_Rela *r,
	const Elf32_Sym *s, Elf32_Addr *p, int v)
{
	if(ELF32_R_TYPE((r)->r_info) == RELOC_RELATIVE) {
		if((ELF32_ST_BIND((s)->st_info) == STB_LOCAL) &&
		   ((ELF32_ST_TYPE((s)->st_info) == STT_SECTION) ||
		   (ELF32_ST_TYPE((s)->st_info) == STT_NOTYPE)) ) {
			*(p) = (v) + (r)->r_addend;
		} else {
			*(p) = (v) + (s)->st_value + (r)->r_addend;
		}
	} else if(ELF32_R_TYPE((r)->r_info) == RELOC_JMP_SLOT) {
		Elf32_Addr val = (v) + (s)->st_value + (r)->r_addend -
			(Elf32_Addr)(p);
		if (((val & 0xfe000000) != 0) &&
			((val & 0xfe000000) != 0xfe000000))
		{
			/* invalid offset */
			_dl_exit(20);
		}
		val &= ~0xfc000000;
		val |=  0x48000000;
		*(p) = val;
		_dl_dcbf(p);
	} else if(ELF32_R_TYPE((r)->r_info) == RELOC_GLOB_DAT) {
		*(p) = (v) + (s)->st_value + (r)->r_addend;
	} else {
		/* error */
	}
}

#endif /* _POWERPC_ARCHDEP_H_ */