diff options
Diffstat (limited to 'libexec/rtld-aout/i386')
| -rw-r--r-- | libexec/rtld-aout/i386/md-static-funcs.c | 17 | ||||
| -rw-r--r-- | libexec/rtld-aout/i386/md.c | 384 | ||||
| -rw-r--r-- | libexec/rtld-aout/i386/md.h | 245 | ||||
| -rw-r--r-- | libexec/rtld-aout/i386/mdprologue.S | 93 |
4 files changed, 0 insertions, 739 deletions
diff --git a/libexec/rtld-aout/i386/md-static-funcs.c b/libexec/rtld-aout/i386/md-static-funcs.c deleted file mode 100644 index 77c25c5..0000000 --- a/libexec/rtld-aout/i386/md-static-funcs.c +++ /dev/null @@ -1,17 +0,0 @@ -/* - * $FreeBSD$ - * - * Called by ld.so when onanating. - * This *must* be a static function, so it is not called through a jmpslot. - */ - -static void -md_relocate_simple(r, relocation, addr) -struct relocation_info *r; -long relocation; -char *addr; -{ - if (r->r_relative) - *(long *)addr += relocation; -} - diff --git a/libexec/rtld-aout/i386/md.c b/libexec/rtld-aout/i386/md.c deleted file mode 100644 index 63b9d17..0000000 --- a/libexec/rtld-aout/i386/md.c +++ /dev/null @@ -1,384 +0,0 @@ -/* - * 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. - * 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. - * - * $FreeBSD$ - */ - -#include <sys/param.h> -#include <stddef.h> -#include <stdio.h> -#include <stdlib.h> -#include <sys/types.h> -#include <err.h> -#include <fcntl.h> -#include <a.out.h> -#include <stab.h> -#include <string.h> - -#include "dynamic.h" - -#if defined(RTLD) && defined(SUN_COMPAT) -#define REL_SIZE(r) (2) /* !!!!! Sun BUG compatible */ -#else -#define REL_SIZE(r) ((r)->r_length) -#endif - -/* - * Get relocation addend corresponding to relocation record RP - * from address ADDR - */ -long -md_get_addend(rp, addr) -struct relocation_info *rp; -unsigned char *addr; -{ - switch (REL_SIZE(rp)) { - case 0: - return get_byte(addr); - case 1: - return get_short(addr); - case 2: - return get_long(addr); - default: - errx(1, "Unsupported relocation size: %x", - REL_SIZE(rp)); - } -} - -/* - * Put RELOCATION at ADDR according to relocation record RP. - */ -void -md_relocate(rp, relocation, addr, relocatable_output) -struct relocation_info *rp; -long relocation; -unsigned char *addr; -int relocatable_output; -{ - switch (REL_SIZE(rp)) { - case 0: - put_byte(addr, relocation); - break; - case 1: - put_short(addr, relocation); - break; - case 2: - put_long(addr, relocation); - break; - default: - errx(1, "Unsupported relocation size: %x", - REL_SIZE(rp)); - } -} - -/* - * Machine dependent part of claim_rrs_reloc(). - * Set RRS relocation type. - */ -int -md_make_reloc(rp, r, type) -struct relocation_info *rp, *r; -int type; -{ - /* Relocation size */ - r->r_length = rp->r_length; - - if (rp->r_pcrel) - r->r_pcrel = 1; - - if (type & RELTYPE_RELATIVE) - r->r_relative = 1; - - if (type & RELTYPE_COPY) - r->r_copy = 1; - - return 0; -} - -/* - * Set up a transfer from jmpslot at OFFSET (relative to the PLT table) - * to the binder slot (which is at offset 0 of the PLT). - */ -void -md_make_jmpslot(sp, offset, index) -jmpslot_t *sp; -long offset; -long index; -{ - /* - * i386 PC-relative "fixed point" is located right after the - * instruction it pertains to. - */ - u_long fudge = - (sizeof(sp->opcode) + sizeof(sp->addr) + offset); - - sp->opcode = CALL; -#if 0 - sp->addr = fudge; -#else - sp->addr[0] = fudge & 0xffff; - sp->addr[1] = fudge >> 16; -#endif - sp->reloc_index = index; -} - -/* - * Set up a "direct" transfer (ie. not through the run-time binder) from - * jmpslot at OFFSET to ADDR. Used by `ld' when the SYMBOLIC flag is on, - * and by `ld.so' after resolving the symbol. - * On the i386, we use the JMP instruction which is PC relative, so no - * further RRS relocations will be necessary for such a jmpslot. - */ -void -md_fix_jmpslot(sp, offset, addr) -jmpslot_t *sp; -long offset; -u_long addr; -{ - u_long fudge = addr - (sizeof(sp->opcode) + sizeof(sp->addr) + offset); - - sp->opcode = JUMP; -#if 0 - sp->addr = fudge; -#else - sp->addr[0] = fudge & 0xffff; - sp->addr[1] = fudge >> 16; -#endif - sp->reloc_index = 0; -} - -/* - * Bind a jmpslot to its target address. TARGET is where the jmpslot - * should jump to, and WHERE is a pointer to the jmpslot's address field. - * This is called by the dynamic linker when LD_BIND_NOW is set in the - * environment. - */ -void -md_bind_jmpslot(target, where) -u_long target; -caddr_t where; -{ - jmpslot_t *sp = - (jmpslot_t *) (where - offsetof(jmpslot_t, addr[0])); - - md_fix_jmpslot(sp, (long) sp, target); -} - -/* - * Update the relocation record for a RRS jmpslot. - */ -void -md_make_jmpreloc(rp, r, type) -struct relocation_info *rp, *r; -int type; -{ - jmpslot_t *sp; - - /* - * Fix relocation address to point to the correct - * location within this jmpslot. - */ - r->r_address += sizeof(sp->opcode); - - /* Relocation size */ - r->r_length = 2; - - /* Set relocation type */ - r->r_jmptable = 1; - if (type & RELTYPE_RELATIVE) - r->r_relative = 1; - -} - -/* - * Set relocation type for a RRS GOT relocation. - */ -void -md_make_gotreloc(rp, r, type) -struct relocation_info *rp, *r; -int type; -{ - r->r_baserel = 1; - if (type & RELTYPE_RELATIVE) - r->r_relative = 1; - - /* Relocation size */ - r->r_length = 2; -} - -/* - * Set relocation type for a RRS copy operation. - */ -void -md_make_cpyreloc(rp, r) -struct relocation_info *rp, *r; -{ - /* Relocation size */ - r->r_length = 2; - - r->r_copy = 1; -} - -void -md_set_breakpoint(where, savep) -long where; -long *savep; -{ - *savep = *(long *)where; - *(char *)where = TRAP; -} - -#ifndef RTLD - -#ifdef __FreeBSD__ -int netzmagic; -#endif - -/* - * Initialize (output) exec header such that useful values are - * obtained from subsequent N_*() macro evaluations. - */ -void -md_init_header(hp, magic, flags) -struct exec *hp; -int magic, flags; -{ -#ifdef NetBSD - if (oldmagic || magic == QMAGIC) - hp->a_midmag = magic; - else - N_SETMAGIC((*hp), magic, MID_I386, flags); -#endif -#ifdef __FreeBSD__ - if (oldmagic) - hp->a_midmag = magic; - else if (netzmagic) - N_SETMAGIC_NET((*hp), magic, MID_I386, flags); - else - N_SETMAGIC((*hp), magic, MID_I386, flags); -#endif - - /* TEXT_START depends on the value of outheader.a_entry. */ - if (!(link_mode & SHAREABLE)) - hp->a_entry = PAGSIZ; -} -#endif /* RTLD */ - - -#ifdef NEED_SWAP -/* - * Byte swap routines for cross-linking. - */ - -void -md_swapin_exec_hdr(h) -struct exec *h; -{ - int skip = 0; - - if (!N_BADMAG(*h)) - skip = 1; - - swap_longs((long *)h + skip, sizeof(*h)/sizeof(long) - skip); -} - -void -md_swapout_exec_hdr(h) -struct exec *h; -{ - /* NetBSD: Always leave magic alone */ - int skip = 1; -#if 0 - if (N_GETMAGIC(*h) == OMAGIC) - skip = 0; -#endif - - swap_longs((long *)h + skip, sizeof(*h)/sizeof(long) - skip); -} - - -void -md_swapin_reloc(r, n) -struct relocation_info *r; -int n; -{ - int bits; - - for (; n; n--, r++) { - r->r_address = md_swap_long(r->r_address); - bits = ((int *)r)[1]; - r->r_symbolnum = md_swap_long(bits) & 0x00ffffff; - r->r_pcrel = (bits & 1); - r->r_length = (bits >> 1) & 3; - r->r_extern = (bits >> 3) & 1; - r->r_baserel = (bits >> 4) & 1; - r->r_jmptable = (bits >> 5) & 1; - r->r_relative = (bits >> 6) & 1; -#ifdef N_SIZE - r->r_copy = (bits >> 7) & 1; -#endif - } -} - -void -md_swapout_reloc(r, n) -struct relocation_info *r; -int n; -{ - int bits; - - for (; n; n--, r++) { - r->r_address = md_swap_long(r->r_address); - bits = md_swap_long(r->r_symbolnum) & 0xffffff00; - bits |= (r->r_pcrel & 1); - bits |= (r->r_length & 3) << 1; - bits |= (r->r_extern & 1) << 3; - bits |= (r->r_baserel & 1) << 4; - bits |= (r->r_jmptable & 1) << 5; - bits |= (r->r_relative & 1) << 6; -#ifdef N_SIZE - bits |= (r->r_copy & 1) << 7; -#endif - ((int *)r)[1] = bits; - } -} - -void -md_swapout_jmpslot(j, n) -jmpslot_t *j; -int n; -{ - for (; n; n--, j++) { - j->opcode = md_swap_short(j->opcode); - j->addr[0] = md_swap_short(j->addr[0]); - j->addr[1] = md_swap_short(j->addr[1]); - j->reloc_index = md_swap_short(j->reloc_index); - } -} - -#endif /* NEED_SWAP */ diff --git a/libexec/rtld-aout/i386/md.h b/libexec/rtld-aout/i386/md.h deleted file mode 100644 index ef5b632..0000000 --- a/libexec/rtld-aout/i386/md.h +++ /dev/null @@ -1,245 +0,0 @@ -/* - * 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. - * 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. - * - * $FreeBSD$ - */ - -#ifndef __MD_H__ -#define __MD_H__ - -#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 - -#if defined(NetBSD) || defined(CROSS_LINKER) - -#define N_SET_FLAG(ex,f) (oldmagic || N_GETMAGIC(ex)==QMAGIC ? (0) : \ - 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) - -#endif - -/* - * FreeBSD does it differently - */ -#ifdef __FreeBSD__ -#define N_SET_FLAG(ex,f) (oldmagic ? (0) : \ - (netzmagic == 0 ? \ - N_SETMAGIC(ex, \ - N_GETMAGIC(ex), \ - MID_MACHINE, \ - N_GETFLAG(ex)|(f)) : \ - N_SETMAGIC_NET(ex, \ - N_GETMAGIC_NET(ex), \ - MID_MACHINE, \ - N_GETFLAG_NET(ex)|(f)) )) - -#define N_IS_DYNAMIC(ex) ((N_GETMAGIC_NET(ex) == ZMAGIC) ? \ - ((N_GETFLAG_NET(ex) & EX_DYNAMIC)) : \ - ((N_GETFLAG(ex) & EX_DYNAMIC) )) -#define N_BADMID(ex) 0 -#endif - -/* - * 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 DATA_START(ex) (N_DATADDR(ex) + N_ADJUST(ex)) - -#define RELOC_STATICS_THROUGH_GOT_P(r) (0) -#define JMPSLOT_NEEDS_RELOC (0) - -#define md_got_reloc(r) (0) - -#define md_get_rt_segment_addend(r,a) md_get_addend(r,a) - -#define RELOC_INIT_SEGMENT_RELOC(r) ((r)->r_length = 2) - -/* 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; - -#define NOP 0x90 -#define CALL 0xe890 /* NOP + CALL opcode */ -#define JUMP 0xe990 /* NOP + JMP opcode */ -#define TRAP 0xcc /* INT 3 */ - -/* - * 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) -#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); } - -#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)) - -#endif /* CROSS_LINKER */ - -void md_init_header __P((struct exec *, int, int)); -long md_get_addend __P((struct relocation_info *, unsigned char *)); -void md_relocate __P((struct relocation_info *, long, unsigned char *, int)); -void md_make_jmpslot __P((jmpslot_t *, long, long)); -void md_fix_jmpslot __P((jmpslot_t *, long, u_long)); -void md_bind_jmpslot __P((u_long, caddr_t)); -int md_make_reloc __P((struct relocation_info *, struct relocation_info *, int)); -void md_make_jmpreloc __P((struct relocation_info *, struct relocation_info *, int)); -void md_make_gotreloc __P((struct relocation_info *, struct relocation_info *, int)); -void md_make_copyreloc __P((struct relocation_info *, struct relocation_info *)); -void md_set_breakpoint __P((long, long *)); - - -#endif /* __MD_H__ */ diff --git a/libexec/rtld-aout/i386/mdprologue.S b/libexec/rtld-aout/i386/mdprologue.S deleted file mode 100644 index f111bca..0000000 --- a/libexec/rtld-aout/i386/mdprologue.S +++ /dev/null @@ -1,93 +0,0 @@ -/* - * 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. - * 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. - * - * $FreeBSD$ - */ - -/* - * i386 run-time link editor entry points. - */ - -#include <sys/syscall.h> - - .text - .globl _binder, _binder_entry - -/* - * _rtl(int version, struct crt_ldso *crtp) - */ - -_rtl: # crt0 calls us here - pushl %ebp # Allocate stack frame - movl %esp,%ebp - pushl %ebx - - call 1f # PIC function prologue -1: - popl %ebx - addl $_GLOBAL_OFFSET_TABLE_+[.-1b],%ebx - - movl 12(%ebp),%eax # Extract data from interface structure - movl (%eax),%eax # base address of ld.so (first field) - # setup arguments for rtld() - movl (%ebx),%ecx # 1st entry in GOT is our __DYNAMIC - addl %eax,%ecx # add load address - pushl %ecx # 3rd arg - pushl 12(%ebp) # 2nd arg == &crt. - pushl 8(%ebp) # 1st arg == version - addl _rtld@GOT(%ebx),%eax # relocate address of function - call %eax # _rtld(version, crtp, DYNAMIC) - addl $12,%esp # pop arguments - - popl %ebx - leave # remove stack frame - ret - - # First call to a procedure generally comes through here for - # binding. - -_binder_entry: - pushl %ebp # setup a stack frame - movl %esp,%ebp - pusha # save all regs - - xorl %eax,%eax # clear - movl 4(%ebp),%esi # return address in PLT - movw (%esi),%ax # get hold of relocation number - subl $6,%esi # make it point to the jmpslot - - pushl %eax # pushd arguments - pushl %esi # - call _binder@PLT # _binder(rpc, index) - addl $8,%esp # pop arguments - movl %eax,4(%ebp) # return value from _binder() == actual - # address of function - popa # restore regs - leave # remove our stack frame - ret |
