SRCS+= module.c panic.c rel_open.c
.if ${MACHINE_ARCH} == "i386" || ${MACHINE_ARCH} == "amd64"
-SRCS+= load_elf32.c load_elf64.c
+SRCS+= load_elf32.c load_elf32_obj.c reloc_elf32.c
+SRCS+= load_elf64.c load_elf64_obj.c reloc_elf64.c
.endif
.if ${MACHINE_ARCH} == "powerpc"
SRCS+= load_elf32.c
void hexdump(caddr_t region, size_t len);
size_t strlenout(vm_offset_t str);
char *strdupout(vm_offset_t str);
+void kern_bzero(vm_offset_t dest, size_t len);
+int kern_pread(int fd, vm_offset_t dest, size_t len, off_t off);
+void *alloc_pread(int fd, off_t off, size_t len);
/* bcache.c */
int bcache_init(u_int nblks, size_t bsize);
/* MI module loaders */
#ifdef __elfN
+/* Relocation types. */
+#define ELF_RELOC_REL 1
+#define ELF_RELOC_RELA 2
+
+/* Relocation offset for some architectures */
+extern u_int64_t __elfN(relocation_offset);
+
+struct elf_file;
+typedef Elf_Addr (symaddr_fn)(struct elf_file *ef, Elf_Size symidx);
+
int __elfN(loadfile)(char *filename, u_int64_t dest, struct preloaded_file **result);
+int __elfN(obj_loadfile)(char *filename, u_int64_t dest,
+ struct preloaded_file **result);
+int __elfN(reloc)(struct elf_file *ef, symaddr_fn *symaddr,
+ const void *reldata, int reltype, Elf_Addr relbase,
+ Elf_Addr dataaddr, void *data, size_t len);
#endif
/*
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
- * $FreeBSD: src/sys/boot/common/load_elf.c,v 1.29 2003/08/25 23:30:41 obrien Exp $
- * $DragonFly: src/sys/boot/common/load_elf.c,v 1.7 2008/09/02 17:21:12 dillon Exp $
+ * $FreeBSD: src/sys/boot/common/load_elf.c,v 1.39 2008/10/14 10:11:14 raj Exp $
*/
#include <sys/param.h>
#include <sys/exec.h>
#include <sys/linker.h>
#include <sys/module.h>
+#include <sys/stdint.h>
#include <string.h>
#include <machine/elf.h>
#include <stand.h>
Elf_Hashelt nchains;
Elf_Hashelt *buckets;
Elf_Hashelt *chains;
+ Elf_Rel *rel;
+ size_t relsz;
Elf_Rela *rela;
size_t relasz;
char *strtab;
static int __elfN(loadimage)(struct preloaded_file *mp, elf_file_t ef, u_int64_t loadaddr);
static int __elfN(lookup_symbol)(struct preloaded_file *mp, elf_file_t ef, const char* name, Elf_Sym* sym);
-#ifdef __sparc__
-static void __elfN(reloc_ptr)(struct preloaded_file *mp, elf_file_t ef,
- void *p, void *val, size_t len);
-#endif
+static int __elfN(reloc_ptr)(struct preloaded_file *mp, elf_file_t ef,
+ Elf_Addr p, void *val, size_t len);
static int __elfN(parse_modmetadata)(struct preloaded_file *mp, elf_file_t ef);
+static symaddr_fn __elfN(symaddr);
static char *fake_modname(const char *name);
const char *__elfN(kerneltype) = "elf kernel";
const char *__elfN(moduletype) = "elf module";
+u_int64_t __elfN(relocation_offset) = 0;
+
/*
* Attempt to load the file (file) as an ELF module. It will be stored at
* (dest), and a pointer to a module structure describing the loaded object
fp = NULL;
bzero(&ef, sizeof(struct elf_file));
-
+
/*
* Open the image, read and validate the ELF header
*/
int ret;
vm_offset_t firstaddr;
vm_offset_t lastaddr;
- void *buf;
- size_t resid, chunk;
+ size_t chunk;
ssize_t result;
- vm_offset_t dest;
Elf_Addr ssym, esym;
Elf_Dyn *dp;
Elf_Addr adp;
#else
off = - (off & 0xff000000u); /* i386 relocates after locore */
#endif
+#elif defined(__powerpc__)
+ /*
+ * On the purely virtual memory machines like e500, the kernel is
+ * linked against its final VA range, which is most often not
+ * available at the loader stage, but only after kernel initializes
+ * and completes its VM settings. In such cases we cannot use p_vaddr
+ * field directly to load ELF segments, but put them at some
+ * 'load-time' locations.
+ */
+ if (off & 0xf0000000u) {
+ off = -(off & 0xf0000000u);
+ /*
+ * XXX the physical load address should not be hardcoded. Note
+ * that the Book-E kernel assumes that it's loaded at a 16MB
+ * boundary for now...
+ */
+ off += 0x01000000;
+ ehdr->e_entry += off;
+#ifdef ELF_VERBOSE
+ printf("Converted entry 0x%08x\n", ehdr->e_entry);
+#endif
+ } else
+ off = 0;
+#elif defined(__arm__)
+ if (off & 0xf0000000u) {
+ off = -(off & 0xf0000000u);
+ ehdr->e_entry += off;
+#ifdef ELF_VERBOSE
+ printf("Converted entry 0x%08x\n", ehdr->e_entry);
+#endif
+ } else
+ off = 0;
+#else
+ off = 0; /* other archs use direct mapped kernels */
#endif
+ __elfN(relocation_offset) = off;
}
ef->off = off;
phdr[i].p_vaddr + off, fpcopy);
}
if (phdr[i].p_filesz > fpcopy) {
- if (lseek(ef->fd, (off_t)(phdr[i].p_offset + fpcopy),
- SEEK_SET) == -1) {
- printf("\nelf" __XSTRING(__ELF_WORD_SIZE) "_loadexec: cannot seek\n");
- goto out;
- }
- if (archsw.arch_readin(ef->fd, phdr[i].p_vaddr + off + fpcopy,
- phdr[i].p_filesz - fpcopy) != (ssize_t)(phdr[i].p_filesz - fpcopy)) {
- printf("\nelf" __XSTRING(__ELF_WORD_SIZE) "_loadexec: archsw.readin failed\n");
+ if (kern_pread(ef->fd, phdr[i].p_vaddr + off + fpcopy,
+ phdr[i].p_filesz - fpcopy, phdr[i].p_offset + fpcopy) != 0) {
+ printf("\nelf" __XSTRING(__ELF_WORD_SIZE)
+ "_loadimage: read failed\n");
goto out;
}
}
(long)(phdr[i].p_vaddr + off + phdr[i].p_memsz - 1));
#endif
- /* no archsw.arch_bzero */
- buf = malloc(PAGE_SIZE);
- if (buf == NULL) {
- printf("\nelf" __XSTRING(__ELF_WORD_SIZE) "_loadimage: malloc() failed\n");
- goto out;
- }
- bzero(buf, PAGE_SIZE);
- resid = phdr[i].p_memsz - phdr[i].p_filesz;
- dest = phdr[i].p_vaddr + off + phdr[i].p_filesz;
- while (resid > 0) {
- chunk = szmin(PAGE_SIZE, resid);
- archsw.arch_copyin(buf, dest, chunk);
- resid -= chunk;
- dest += chunk;
- }
- free(buf);
+ kern_bzero(phdr[i].p_vaddr + off + phdr[i].p_filesz,
+ phdr[i].p_memsz - phdr[i].p_filesz);
}
#ifdef ELF_VERBOSE
printf("\n");
chunk = ehdr->e_shnum * ehdr->e_shentsize;
if (chunk == 0 || ehdr->e_shoff == 0)
goto nosyms;
- shdr = malloc(chunk);
- if (shdr == NULL)
- goto nosyms;
- if (lseek(ef->fd, (off_t)ehdr->e_shoff, SEEK_SET) == -1) {
- printf("\nelf" __XSTRING(__ELF_WORD_SIZE) "_loadimage: cannot lseek() to section headers");
- goto nosyms;
- }
- result = read(ef->fd, shdr, chunk);
- if (result < 0 || (size_t)result != chunk) {
- printf("\nelf" __XSTRING(__ELF_WORD_SIZE) "_loadimage: read section headers failed");
+ shdr = alloc_pread(ef->fd, ehdr->e_shoff, chunk);
+ if (shdr == NULL) {
+ printf("\nelf" __XSTRING(__ELF_WORD_SIZE)
+ "_loadimage: failed to read section headers");
goto nosyms;
}
symtabindex = -1;
lastaddr += sizeof(size);
#ifdef ELF_VERBOSE
- printf("\n%s: 0x%lx@0x%lx -> 0x%lx-0x%lx", secname,
- shdr[i].sh_size, shdr[i].sh_offset,
- lastaddr, lastaddr + shdr[i].sh_size);
+ printf("\n%s: 0x%jx@0x%jx -> 0x%jx-0x%jx", secname,
+ (uintmax_t)shdr[i].sh_size, (uintmax_t)shdr[i].sh_offset,
+ (uintmax_t)lastaddr, (uintmax_t)(lastaddr + shdr[i].sh_size));
#else
if (i == symstrindex)
printf("+");
case DT_SYMTAB:
ef->symtab = (Elf_Sym*)(uintptr_t)(dp[i].d_un.d_ptr + off);
break;
+ case DT_REL:
+ ef->rel = (Elf_Rel *)(uintptr_t)(dp[i].d_un.d_ptr + off);
+ break;
+ case DT_RELSZ:
+ ef->relsz = dp[i].d_un.d_val;
+ break;
case DT_RELA:
ef->rela = (Elf_Rela *)(uintptr_t)(dp[i].d_un.d_ptr + off);
break;
struct mod_version mver;
Elf_Sym sym;
char *s;
- int modcnt, minfolen;
+ int error, modcnt, minfolen;
Elf_Addr v, p, p_stop;
if (__elfN(lookup_symbol)(fp, ef, "__start_set_modmetadata_set", &sym) != 0)
modcnt = 0;
while (p < p_stop) {
COPYOUT(p, &v, sizeof(v));
-#ifdef __sparc64__
- __elfN(reloc_ptr)(fp, ef, p, &v, sizeof(v));
-#else
- v += ef->off;
-#endif
+ error = __elfN(reloc_ptr)(fp, ef, p, &v, sizeof(v));
+ if (error == EOPNOTSUPP)
+ v += ef->off;
+ else if (error != 0)
+ return (error);
#if defined(__i386__) && __ELF_WORD_SIZE == 64
COPYOUT(v, &md64, sizeof(md64));
+ error = __elfN(reloc_ptr)(fp, ef, v, &md64, sizeof(md64));
+ if (error == EOPNOTSUPP) {
+ md64.md_cval += ef->off;
+ md64.md_data += ef->off;
+ } else if (error != 0)
+ return (error);
md.md_version = md64.md_version;
md.md_type = md64.md_type;
- md.md_cval = (const char *)(uintptr_t)(md64.md_cval + ef->off);
- md.md_data = (void *)(uintptr_t)(md64.md_data + ef->off);
+ md.md_cval = (const char *)(uintptr_t)md64.md_cval;
+ md.md_data = (void *)(uintptr_t)md64.md_data;
#else
COPYOUT(v, &md, sizeof(md));
-#ifdef __sparc64__
- __elfN(reloc_ptr)(fp, ef, v, &md, sizeof(md));
-#else
- md.md_cval += ef->off;
- md.md_data = (uint8_t *)md.md_data + ef->off;
-#endif
+ error = __elfN(reloc_ptr)(fp, ef, v, &md, sizeof(md));
+ if (error == EOPNOTSUPP) {
+ md.md_cval += ef->off;
+ md.md_data += ef->off;
+ } else if (error != 0)
+ return (error);
#endif
p += sizeof(Elf_Addr);
switch(md.md_type) {
return ENOENT;
}
-#ifdef __sparc__
/*
- * Apply any intra-module relocations to the value. *p is the load address
+ * Apply any intra-module relocations to the value. p is the load address
* of the value and val/len is the value to be modified. This does NOT modify
* the image in-place, because this is done by kern_linker later on.
+ *
+ * Returns EOPNOTSUPP if no relocation method is supplied.
*/
-static void
+static int
__elfN(reloc_ptr)(struct preloaded_file *mp, elf_file_t ef,
- void *p, void *val, size_t len)
+ Elf_Addr p, void *val, size_t len)
{
- Elf_Addr off = (Elf_Addr)p - ef->off, word;
size_t n;
- Elf_Rela r;
+ Elf_Rela a;
+ Elf_Rel r;
+ int error;
+
+ /*
+ * The kernel is already relocated, but we still want to apply
+ * offset adjustments.
+ */
+ if (ef->kernel)
+ return (EOPNOTSUPP);
+
+ for (n = 0; n < ef->relsz / sizeof(r); n++) {
+ COPYOUT(ef->rel + n, &r, sizeof(r));
- for (n = 0; n < ef->relasz / sizeof(r); n++) {
- COPYOUT(ef->rela + n, &r, sizeof(r));
+ error = __elfN(reloc)(ef, __elfN(symaddr), &r, ELF_RELOC_REL,
+ ef->off, p, val, len);
+ if (error != 0)
+ return (error);
+ }
+ for (n = 0; n < ef->relasz / sizeof(a); n++) {
+ COPYOUT(ef->rela + n, &a, sizeof(a));
- if (r.r_offset >= off && r.r_offset < off + len &&
- ELF_R_TYPE(r.r_info) == R_SPARC_RELATIVE) {
- word = ef->off + r.r_addend;
- bcopy(&word, (char *)val + (r.r_offset - off),
- sizeof(word));
- }
+ error = __elfN(reloc)(ef, __elfN(symaddr), &a, ELF_RELOC_RELA,
+ ef->off, p, val, len);
+ if (error != 0)
+ return (error);
}
+
+ return (0);
+}
+
+static Elf_Addr
+__elfN(symaddr)(struct elf_file *ef, Elf_Size symidx)
+{
+
+ /* Symbol lookup by index not required here. */
+ return (0);
}
-#endif
-/*
- * $FreeBSD: src/sys/boot/common/load_elf32.c,v 1.2 2003/08/25 23:30:41 obrien Exp $
- * $DragonFly: src/sys/boot/common/load_elf32.c,v 1.1 2003/11/10 06:08:31 dillon Exp $
- */
-
#define __ELF_WORD_SIZE 32
#include "load_elf.c"
--- /dev/null
+#define __ELF_WORD_SIZE 32
+
+#include "load_elf_obj.c"
-/*
- * $FreeBSD: src/sys/boot/common/load_elf64.c,v 1.2 2003/08/25 23:30:41 obrien Exp $
- * $DragonFly: src/sys/boot/common/load_elf64.c,v 1.1 2003/11/10 06:08:31 dillon Exp $
- */
-
#define __ELF_WORD_SIZE 64
#include "load_elf.c"
--- /dev/null
+#define __ELF_WORD_SIZE 64
+
+#include "load_elf_obj.c"
--- /dev/null
+/*-
+ * Copyright (c) 2004 Ian Dowse <iedowse@freebsd.org>
+ * Copyright (c) 1998 Michael Smith <msmith@freebsd.org>
+ * Copyright (c) 1998 Peter Wemm <peter@freebsd.org>
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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: src/sys/boot/common/load_elf_obj.c,v 1.2 2005/12/18 04:52:35 marcel Exp $
+ */
+
+#include <sys/param.h>
+#include <sys/exec.h>
+#include <sys/linker.h>
+#include <sys/module.h>
+#include <inttypes.h>
+#include <string.h>
+#include <machine/elf.h>
+#include <stand.h>
+#define FREEBSD_ELF
+#include <link.h>
+
+#include "bootstrap.h"
+
+#define COPYOUT(s,d,l) archsw.arch_copyout((vm_offset_t)(s), d, l)
+
+#if defined(__i386__) && __ELF_WORD_SIZE == 64
+#undef ELF_TARG_CLASS
+#undef ELF_TARG_MACH
+#define ELF_TARG_CLASS ELFCLASS64
+#define ELF_TARG_MACH EM_X86_64
+#endif
+
+typedef struct elf_file {
+ Elf_Ehdr hdr;
+ Elf_Shdr *e_shdr;
+
+ int symtabindex; /* Index of symbol table */
+ int shstrindex; /* Index of section name string table */
+
+ int fd;
+ vm_offset_t off;
+} *elf_file_t;
+
+static int __elfN(obj_loadimage)(struct preloaded_file *mp, elf_file_t ef,
+ u_int64_t loadaddr);
+static int __elfN(obj_lookup_set)(struct preloaded_file *mp, elf_file_t ef,
+ const char *name, Elf_Addr *startp, Elf_Addr *stopp, int *countp);
+static int __elfN(obj_reloc_ptr)(struct preloaded_file *mp, elf_file_t ef,
+ Elf_Addr p, void *val, size_t len);
+static int __elfN(obj_parse_modmetadata)(struct preloaded_file *mp,
+ elf_file_t ef);
+static Elf_Addr __elfN(obj_symaddr)(struct elf_file *ef, Elf_Size symidx);
+
+const char *__elfN(obj_kerneltype) = "elf kernel";
+const char *__elfN(obj_moduletype) = "elf obj module";
+
+/*
+ * Attempt to load the file (file) as an ELF module. It will be stored at
+ * (dest), and a pointer to a module structure describing the loaded object
+ * will be saved in (result).
+ */
+int
+__elfN(obj_loadfile)(char *filename, u_int64_t dest,
+ struct preloaded_file **result)
+{
+ struct preloaded_file *fp, *kfp;
+ struct elf_file ef;
+ Elf_Ehdr *hdr;
+ int err;
+ ssize_t bytes_read;
+
+ fp = NULL;
+ bzero(&ef, sizeof(struct elf_file));
+
+ /*
+ * Open the image, read and validate the ELF header
+ */
+ if (filename == NULL) /* can't handle nameless */
+ return(EFTYPE);
+ if ((ef.fd = rel_open(filename, O_RDONLY)) == -1)
+ return(errno);
+
+ hdr = &ef.hdr;
+ bytes_read = read(ef.fd, hdr, sizeof(*hdr));
+ if (bytes_read != sizeof(*hdr)) {
+ err = EFTYPE; /* could be EIO, but may be small file */
+ goto oerr;
+ }
+
+ /* Is it ELF? */
+ if (!IS_ELF(*hdr)) {
+ err = EFTYPE;
+ goto oerr;
+ }
+ if (hdr->e_ident[EI_CLASS] != ELF_TARG_CLASS || /* Layout ? */
+ hdr->e_ident[EI_DATA] != ELF_TARG_DATA ||
+ hdr->e_ident[EI_VERSION] != EV_CURRENT || /* Version ? */
+ hdr->e_version != EV_CURRENT ||
+ hdr->e_machine != ELF_TARG_MACH || /* Machine ? */
+ hdr->e_type != ET_REL) {
+ err = EFTYPE;
+ goto oerr;
+ }
+
+ if (hdr->e_shnum * hdr->e_shentsize == 0 || hdr->e_shoff == 0 ||
+ hdr->e_shentsize != sizeof(Elf_Shdr)) {
+ err = EFTYPE;
+ goto oerr;
+ }
+
+ kfp = file_findfile(NULL, NULL);
+ if (kfp == NULL) {
+ printf("elf" __XSTRING(__ELF_WORD_SIZE)
+ "_obj_loadfile: can't load module before kernel\n");
+ err = EPERM;
+ goto oerr;
+ }
+ if (strcmp(__elfN(obj_kerneltype), kfp->f_type)) {
+ printf("elf" __XSTRING(__ELF_WORD_SIZE)
+ "_obj_loadfile: can't load module with kernel type '%s'\n",
+ kfp->f_type);
+ err = EPERM;
+ goto oerr;
+ }
+
+ /* Page-align the load address */
+ dest = roundup(dest, PAGE_SIZE);
+
+ /*
+ * Ok, we think we should handle this.
+ */
+ fp = file_alloc();
+ if (fp == NULL) {
+ printf("elf" __XSTRING(__ELF_WORD_SIZE)
+ "_obj_loadfile: cannot allocate module info\n");
+ err = EPERM;
+ goto out;
+ }
+ fp->f_name = strdup(filename);
+ fp->f_type = strdup(__elfN(obj_moduletype));
+
+ printf("%s ", filename);
+
+ fp->f_size = __elfN(obj_loadimage)(fp, &ef, dest);
+ if (fp->f_size == 0 || fp->f_addr == 0)
+ goto ioerr;
+
+ /* save exec header as metadata */
+ file_addmetadata(fp, MODINFOMD_ELFHDR, sizeof(*hdr), hdr);
+
+ /* Load OK, return module pointer */
+ *result = (struct preloaded_file *)fp;
+ err = 0;
+ goto out;
+
+ioerr:
+ err = EIO;
+oerr:
+ file_discard(fp);
+out:
+ close(ef.fd);
+ if (ef.e_shdr != NULL)
+ free(ef.e_shdr);
+
+ return(err);
+}
+
+/*
+ * With the file (fd) open on the image, and (ehdr) containing
+ * the Elf header, load the image at (off)
+ */
+static int
+__elfN(obj_loadimage)(struct preloaded_file *fp, elf_file_t ef, u_int64_t off)
+{
+ Elf_Ehdr *hdr;
+ Elf_Shdr *shdr;
+ vm_offset_t firstaddr, lastaddr;
+ int i, nsym, res, ret, shdrbytes, symstrindex;
+
+ ret = 0;
+ firstaddr = lastaddr = (vm_offset_t)off;
+ hdr = &ef->hdr;
+ ef->off = (vm_offset_t)off;
+
+ /* Read in the section headers. */
+ shdrbytes = hdr->e_shnum * hdr->e_shentsize;
+ shdr = alloc_pread(ef->fd, (off_t)hdr->e_shoff, shdrbytes);
+ if (shdr == NULL) {
+ printf("\nelf" __XSTRING(__ELF_WORD_SIZE)
+ "_obj_loadimage: read section headers failed\n");
+ goto out;
+ }
+ ef->e_shdr = shdr;
+
+ /*
+ * Decide where to load everything, but don't read it yet.
+ * We store the load address as a non-zero sh_addr value.
+ * Start with the code/data and bss.
+ */
+ for (i = 0; i < hdr->e_shnum; i++)
+ shdr[i].sh_addr = 0;
+ for (i = 0; i < hdr->e_shnum; i++) {
+ switch (shdr[i].sh_type) {
+ case SHT_PROGBITS:
+ case SHT_NOBITS:
+ lastaddr = roundup(lastaddr, shdr[i].sh_addralign);
+ shdr[i].sh_addr = (Elf_Addr)lastaddr;
+ lastaddr += shdr[i].sh_size;
+ break;
+ }
+ }
+
+ /* Symbols. */
+ nsym = 0;
+ for (i = 0; i < hdr->e_shnum; i++) {
+ switch (shdr[i].sh_type) {
+ case SHT_SYMTAB:
+ nsym++;
+ ef->symtabindex = i;
+ shdr[i].sh_addr = (Elf_Addr)lastaddr;
+ lastaddr += shdr[i].sh_size;
+ break;
+ }
+ }
+ if (nsym != 1) {
+ printf("\nelf" __XSTRING(__ELF_WORD_SIZE)
+ "_obj_loadimage: file has no valid symbol table\n");
+ goto out;
+ }
+ lastaddr = roundup(lastaddr, shdr[ef->symtabindex].sh_addralign);
+ shdr[ef->symtabindex].sh_addr = (Elf_Addr)lastaddr;
+ lastaddr += shdr[ef->symtabindex].sh_size;
+
+ symstrindex = shdr[ef->symtabindex].sh_link;
+ if (symstrindex < 0 || symstrindex >= hdr->e_shnum ||
+ shdr[symstrindex].sh_type != SHT_STRTAB) {
+ printf("\nelf" __XSTRING(__ELF_WORD_SIZE)
+ "_obj_loadimage: file has invalid symbol strings\n");
+ goto out;
+ }
+ lastaddr = roundup(lastaddr, shdr[symstrindex].sh_addralign);
+ shdr[symstrindex].sh_addr = (Elf_Addr)lastaddr;
+ lastaddr += shdr[symstrindex].sh_size;
+
+ /* Section names. */
+ if (hdr->e_shstrndx == 0 || hdr->e_shstrndx >= hdr->e_shnum ||
+ shdr[hdr->e_shstrndx].sh_type != SHT_STRTAB) {
+ printf("\nelf" __XSTRING(__ELF_WORD_SIZE)
+ "_obj_loadimage: file has no section names\n");
+ goto out;
+ }
+ ef->shstrindex = hdr->e_shstrndx;
+ lastaddr = roundup(lastaddr, shdr[ef->shstrindex].sh_addralign);
+ shdr[ef->shstrindex].sh_addr = (Elf_Addr)lastaddr;
+ lastaddr += shdr[ef->shstrindex].sh_size;
+
+ /* Relocation tables. */
+ for (i = 0; i < hdr->e_shnum; i++) {
+ switch (shdr[i].sh_type) {
+ case SHT_REL:
+ case SHT_RELA:
+ lastaddr = roundup(lastaddr, shdr[i].sh_addralign);
+ shdr[i].sh_addr = (Elf_Addr)lastaddr;
+ lastaddr += shdr[i].sh_size;
+ break;
+ }
+ }
+
+ /* Clear the whole area, including bss regions. */
+ kern_bzero(firstaddr, lastaddr - firstaddr);
+
+ /* Now read it all in. */
+ for (i = 0; i < hdr->e_shnum; i++) {
+ if (shdr[i].sh_addr == 0 || shdr[i].sh_type == SHT_NOBITS)
+ continue;
+ if (kern_pread(ef->fd, (vm_offset_t)shdr[i].sh_addr,
+ shdr[i].sh_size, (off_t)shdr[i].sh_offset) != 0) {
+ printf("\nelf" __XSTRING(__ELF_WORD_SIZE)
+ "_obj_loadimage: read failed\n");
+ goto out;
+ }
+ }
+
+ file_addmetadata(fp, MODINFOMD_SHDR, shdrbytes, shdr);
+
+ res = __elfN(obj_parse_modmetadata)(fp, ef);
+ if (res != 0)
+ goto out;
+
+ ret = lastaddr - firstaddr;
+ fp->f_addr = firstaddr;
+
+ printf("size 0x%lx at 0x%lx", (u_long)ret, (u_long)firstaddr);
+
+out:
+ printf("\n");
+ return ret;
+}
+
+#if defined(__i386__) && __ELF_WORD_SIZE == 64
+struct mod_metadata64 {
+ int md_version; /* structure version MDTV_* */
+ int md_type; /* type of entry MDT_* */
+ u_int64_t md_data; /* specific data */
+ u_int64_t md_cval; /* common string label */
+};
+#endif
+
+int
+__elfN(obj_parse_modmetadata)(struct preloaded_file *fp, elf_file_t ef)
+{
+ struct mod_metadata md;
+#if defined(__i386__) && __ELF_WORD_SIZE == 64
+ struct mod_metadata64 md64;
+#endif
+ struct mod_depend *mdepend;
+ struct mod_version mver;
+ char *s;
+ int error, modcnt, minfolen;
+ Elf_Addr v, p, p_stop;
+
+ if (__elfN(obj_lookup_set)(fp, ef, "modmetadata_set", &p, &p_stop,
+ &modcnt) != 0)
+ return ENOENT;
+
+ modcnt = 0;
+ while (p < p_stop) {
+ COPYOUT(p, &v, sizeof(v));
+ error = __elfN(obj_reloc_ptr)(fp, ef, p, &v, sizeof(v));
+ if (error != 0)
+ return (error);
+#if defined(__i386__) && __ELF_WORD_SIZE == 64
+ COPYOUT(v, &md64, sizeof(md64));
+ error = __elfN(obj_reloc_ptr)(fp, ef, v, &md64, sizeof(md64));
+ if (error != 0)
+ return (error);
+ md.md_version = md64.md_version;
+ md.md_type = md64.md_type;
+ md.md_cval = (const char *)(uintptr_t)md64.md_cval;
+ md.md_data = (void *)(uintptr_t)md64.md_data;
+#else
+ COPYOUT(v, &md, sizeof(md));
+ error = __elfN(obj_reloc_ptr)(fp, ef, v, &md, sizeof(md));
+ if (error != 0)
+ return (error);
+#endif
+ p += sizeof(Elf_Addr);
+ switch(md.md_type) {
+ case MDT_DEPEND:
+ s = strdupout((vm_offset_t)md.md_cval);
+ minfolen = sizeof(*mdepend) + strlen(s) + 1;
+ mdepend = malloc(minfolen);
+ if (mdepend == NULL)
+ return ENOMEM;
+ COPYOUT((vm_offset_t)md.md_data, mdepend,
+ sizeof(*mdepend));
+ strcpy((char*)(mdepend + 1), s);
+ free(s);
+ file_addmetadata(fp, MODINFOMD_DEPLIST, minfolen,
+ mdepend);
+ free(mdepend);
+ break;
+ case MDT_VERSION:
+ s = strdupout((vm_offset_t)md.md_cval);
+ COPYOUT((vm_offset_t)md.md_data, &mver, sizeof(mver));
+ file_addmodule(fp, s, mver.mv_version, NULL);
+ free(s);
+ modcnt++;
+ break;
+ case MDT_MODULE:
+ break;
+ default:
+ printf("unknown type %d\n", md.md_type);
+ break;
+ }
+ }
+ return 0;
+}
+
+static int
+__elfN(obj_lookup_set)(struct preloaded_file *fp, elf_file_t ef,
+ const char* name, Elf_Addr *startp, Elf_Addr *stopp, int *countp)
+{
+ Elf_Ehdr *hdr;
+ Elf_Shdr *shdr;
+ char *p;
+ vm_offset_t shstrtab;
+ int i;
+
+ hdr = &ef->hdr;
+ shdr = ef->e_shdr;
+ shstrtab = shdr[ef->shstrindex].sh_addr;
+
+ for (i = 0; i < hdr->e_shnum; i++) {
+ if (shdr[i].sh_type != SHT_PROGBITS)
+ continue;
+ if (shdr[i].sh_name == 0)
+ continue;
+ p = strdupout(shstrtab + shdr[i].sh_name);
+ if (strncmp(p, "set_", 4) == 0 && strcmp(p + 4, name) == 0) {
+ *startp = shdr[i].sh_addr;
+ *stopp = shdr[i].sh_addr + shdr[i].sh_size;
+ *countp = (*stopp - *startp) / sizeof(Elf_Addr);
+ free(p);
+ return (0);
+ }
+ free(p);
+ }
+
+ return (ESRCH);
+}
+
+/*
+ * Apply any intra-module relocations to the value. p is the load address
+ * of the value and val/len is the value to be modified. This does NOT modify
+ * the image in-place, because this is done by kern_linker later on.
+ */
+static int
+__elfN(obj_reloc_ptr)(struct preloaded_file *mp, elf_file_t ef, Elf_Addr p,
+ void *val, size_t len)
+{
+ Elf_Ehdr *hdr;
+ Elf_Shdr *shdr;
+ Elf_Addr off = p;
+ Elf_Addr base;
+ Elf_Rela a, *abase;
+ Elf_Rel r, *rbase;
+ int error, i, j, nrel, nrela;
+
+ hdr = &ef->hdr;
+ shdr = ef->e_shdr;
+
+ for (i = 0; i < hdr->e_shnum; i++) {
+ if (shdr[i].sh_type != SHT_RELA && shdr[i].sh_type != SHT_REL)
+ continue;
+ base = shdr[shdr[i].sh_info].sh_addr;
+ if (base == 0 || shdr[i].sh_addr == 0)
+ continue;
+ if (off < base || off + len > base +
+ shdr[shdr[i].sh_info].sh_size)
+ continue;
+
+ switch (shdr[i].sh_type) {
+ case SHT_RELA:
+ abase = (Elf_Rela *)(intptr_t)shdr[i].sh_addr;
+
+ nrela = shdr[i].sh_size / sizeof(Elf_Rela);
+ for (j = 0; j < nrela; j++) {
+ COPYOUT(abase + j, &a, sizeof(a));
+
+ error = __elfN(reloc)(ef, __elfN(obj_symaddr),
+ &a, ELF_RELOC_RELA, base, off, val, len);
+ if (error != 0)
+ return (error);
+ }
+ break;
+ case SHT_REL:
+ rbase = (Elf_Rel *)(intptr_t)shdr[i].sh_addr;
+
+ nrel = shdr[i].sh_size / sizeof(Elf_Rel);
+ for (j = 0; j < nrel; j++) {
+ COPYOUT(rbase + j, &r, sizeof(r));
+
+ error = __elfN(reloc)(ef, __elfN(obj_symaddr),
+ &r, ELF_RELOC_REL, base, off, val, len);
+ if (error != 0)
+ return (error);
+ }
+ break;
+ }
+ }
+ return (0);
+}
+
+/* Look up the address of a specified symbol. */
+static Elf_Addr
+__elfN(obj_symaddr)(struct elf_file *ef, Elf_Size symidx)
+{
+ Elf_Sym sym;
+ Elf_Addr base;
+ int symcnt;
+
+ symcnt = ef->e_shdr[ef->symtabindex].sh_size / sizeof(Elf_Sym);
+ if (symidx >= symcnt)
+ return (0);
+ COPYOUT(ef->e_shdr[ef->symtabindex].sh_addr + symidx * sizeof(Elf_Sym),
+ &sym, sizeof(sym));
+ if (sym.st_shndx == SHN_UNDEF || sym.st_shndx >= ef->hdr.e_shnum)
+ return (0);
+ base = ef->e_shdr[sym.st_shndx].sh_addr;
+ if (base == 0)
+ return (0);
+ return (base + sym.st_value);
+}
return(result);
}
+/* Zero a region in kernel space. */
+void
+kern_bzero(vm_offset_t dest, size_t len)
+{
+ char buf[256];
+ size_t chunk, resid;
+
+ bzero(buf, sizeof(buf));
+ resid = len;
+ while (resid > 0) {
+ chunk = min(sizeof(buf), resid);
+ archsw.arch_copyin(buf, dest, chunk);
+ resid -= chunk;
+ dest += chunk;
+ }
+}
+
+/*
+ * Read the specified part of a file to kernel space. Unlike regular
+ * pread, the file pointer is advanced to the end of the read data,
+ * and it just returns 0 if successful.
+ */
+int
+kern_pread(int fd, vm_offset_t dest, size_t len, off_t off)
+{
+ ssize_t nread;
+
+ if (lseek(fd, off, SEEK_SET) == -1) {
+ printf("\nlseek failed\n");
+ return (-1);
+ }
+ nread = archsw.arch_readin(fd, dest, len);
+ if (nread != len) {
+ printf("\nreadin failed\n");
+ return (-1);
+ }
+ return (0);
+}
+
+/*
+ * Read the specified part of a file to a malloced buffer. The file
+ * pointer is advanced to the end of the read data.
+ */
+void *
+alloc_pread(int fd, off_t off, size_t len)
+{
+ void *buf;
+ ssize_t nread;
+
+ buf = malloc(len);
+ if (buf == NULL) {
+ printf("\nmalloc(%d) failed\n", (int)len);
+ return (NULL);
+ }
+ if (lseek(fd, off, SEEK_SET) == -1) {
+ printf("\nlseek failed\n");
+ free(buf);
+ return (NULL);
+ }
+ nread = read(fd, buf, len);
+ if (nread != len) {
+ printf("\nread failed\n");
+ free(buf);
+ return (NULL);
+ }
+ return (buf);
+}
+
/*
* Display a region in traditional hexdump format.
*/
--- /dev/null
+/*-
+ * Copyright (c) 2003 Jake Burkholder.
+ * Copyright 1996-1998 John D. Polstra.
+ * Copyright (c) 1998 Michael Smith <msmith@freebsd.org>
+ * Copyright (c) 1998 Peter Wemm <peter@freebsd.org>
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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: src/sys/boot/common/reloc_elf.c,v 1.2 2005/12/18 04:52:35 marcel Exp $
+ */
+
+#include <sys/types.h>
+#include <machine/elf.h>
+
+#include <errno.h>
+#include <stand.h>
+
+#define FREEBSD_ELF
+#include <link.h>
+
+#include "bootstrap.h"
+
+#define COPYOUT(s,d,l) archsw.arch_copyout((vm_offset_t)(s), d, l)
+
+/*
+ * Apply a single intra-module relocation to the data. `relbase' is the
+ * target relocation base for the section (i.e. it corresponds to where
+ * r_offset == 0). `dataaddr' is the relocated address corresponding to
+ * the start of the data, and `len' is the number of bytes.
+ */
+int
+__elfN(reloc)(struct elf_file *ef, symaddr_fn *symaddr, const void *reldata,
+ int reltype, Elf_Addr relbase, Elf_Addr dataaddr, void *data, size_t len)
+{
+#ifdef __sparc__
+ Elf_Size w;
+ const Elf_Rela *a;
+
+ switch (reltype) {
+ case ELF_RELOC_RELA:
+ a = reldata;
+ if (relbase + a->r_offset >= dataaddr &&
+ relbase + a->r_offset < dataaddr + len) {
+ switch (ELF_R_TYPE(a->r_info)) {
+ case R_SPARC_RELATIVE:
+ w = relbase + a->r_addend;
+ bcopy(&w, (u_char *)data + (relbase +
+ a->r_offset - dataaddr), sizeof(w));
+ break;
+ default:
+ printf("\nunhandled relocation type %u\n",
+ (u_int)ELF_R_TYPE(a->r_info));
+ return (EFTYPE);
+ }
+ }
+ break;
+ }
+
+ return (0);
+#elif defined(__i386__) && __ELF_WORD_SIZE == 64
+ Elf64_Addr *where, val;
+ Elf_Addr addend, addr;
+ Elf_Size rtype, symidx;
+ const Elf_Rel *rel;
+ const Elf_Rela *rela;
+
+ switch (reltype) {
+ case ELF_RELOC_REL:
+ rel = (const Elf_Rel *)reldata;
+ where = (Elf_Addr *)((char *)data + relbase + rel->r_offset -
+ dataaddr);
+ addend = 0;
+ rtype = ELF_R_TYPE(rel->r_info);
+ symidx = ELF_R_SYM(rel->r_info);
+ addend = 0;
+ break;
+ case ELF_RELOC_RELA:
+ rela = (const Elf_Rela *)reldata;
+ where = (Elf_Addr *)((char *)data + relbase + rela->r_offset -
+ dataaddr);
+ addend = rela->r_addend;
+ rtype = ELF_R_TYPE(rela->r_info);
+ symidx = ELF_R_SYM(rela->r_info);
+ break;
+ default:
+ return (EINVAL);
+ }
+
+ if ((char *)where < (char *)data || (char *)where >= (char *)data + len)
+ return (0);
+
+ if (reltype == ELF_RELOC_REL)
+ addend = *where;
+
+/* XXX, definitions not available on i386. */
+#define R_X86_64_64 1
+#define R_X86_64_RELATIVE 8
+
+ switch (rtype) {
+ case R_X86_64_64: /* S + A */
+ addr = symaddr(ef, symidx);
+ if (addr == 0)
+ return (ESRCH);
+ val = addr + addend;
+ *where = val;
+ break;
+ case R_X86_64_RELATIVE:
+ addr = (Elf_Addr)addend + relbase;
+ val = addr;
+ *where = val;
+ break;
+ default:
+ printf("\nunhandled relocation type %u\n", (u_int)rtype);
+ return (EFTYPE);
+ }
+
+ return (0);
+#elif defined(__i386__) && __ELF_WORD_SIZE == 32
+ Elf_Addr addend, addr, *where, val;
+ Elf_Size rtype, symidx;
+ const Elf_Rel *rel;
+ const Elf_Rela *rela;
+
+ switch (reltype) {
+ case ELF_RELOC_REL:
+ rel = (const Elf_Rel *)reldata;
+ where = (Elf_Addr *)((char *)data + relbase + rel->r_offset -
+ dataaddr);
+ addend = 0;
+ rtype = ELF_R_TYPE(rel->r_info);
+ symidx = ELF_R_SYM(rel->r_info);
+ addend = 0;
+ break;
+ case ELF_RELOC_RELA:
+ rela = (const Elf_Rela *)reldata;
+ where = (Elf_Addr *)((char *)data + relbase + rela->r_offset -
+ dataaddr);
+ addend = rela->r_addend;
+ rtype = ELF_R_TYPE(rela->r_info);
+ symidx = ELF_R_SYM(rela->r_info);
+ break;
+ default:
+ return (EINVAL);
+ }
+
+ if ((char *)where < (char *)data || (char *)where >= (char *)data + len)
+ return (0);
+
+ if (reltype == ELF_RELOC_REL)
+ addend = *where;
+
+/* XXX, definitions not available on amd64. */
+#define R_386_32 1 /* Add symbol value. */
+#define R_386_GLOB_DAT 6 /* Set GOT entry to data address. */
+#define R_386_RELATIVE 8 /* Add load address of shared object. */
+
+ switch (rtype) {
+ case R_386_RELATIVE:
+ addr = addend + relbase;
+ *where = addr;
+ break;
+ case R_386_32: /* S + A */
+ addr = symaddr(ef, symidx);
+ if (addr == 0)
+ return (ESRCH);
+ val = addr + addend;
+ *where = val;
+ break;
+ default:
+ printf("\nunhandled relocation type %u\n", (u_int)rtype);
+ return (EFTYPE);
+ }
+
+ return (0);
+#else
+ return (EOPNOTSUPP);
+#endif
+}
--- /dev/null
+#define __ELF_WORD_SIZE 32
+
+#include "reloc_elf.c"
--- /dev/null
+#define __ELF_WORD_SIZE 64
+
+#include "reloc_elf.c"
#include "btxv86.h"
static int elf32_exec(struct preloaded_file *amp);
+static int elf32_obj_exec(struct preloaded_file *amp);
struct file_format i386_elf = { elf32_loadfile, elf32_exec };
+struct file_format i386_elf_obj = { elf32_obj_loadfile, elf32_obj_exec };
/*
- * There is an a.out kernel and one or more a.out modules loaded.
+ * There is an ELF kernel and one or more ELF modules loaded.
* We wish to start executing the kernel image, so make such
* preparations as are required, and do so.
*/
panic("exec returned");
}
+
+static int
+elf32_obj_exec(struct preloaded_file *fp)
+{
+ return (EFTYPE);
+}
#include "btxv86.h"
static int elf64_exec(struct preloaded_file *amp);
+static int elf64_obj_exec(struct preloaded_file *amp);
struct file_format amd64_elf = { elf64_loadfile, elf64_exec };
+struct file_format amd64_elf_obj = { elf64_obj_loadfile, elf64_obj_exec };
#define PG_V 0x001
#define PG_RW 0x002
extern int amd64_tramp(void);
/*
- * There is an a.out kernel and one or more a.out modules loaded.
+ * There is an ELF kernel and one or more ELF modules loaded.
* We wish to start executing the kernel image, so make such
* preparations as are required, and do so.
*/
bzero(PT2, PAGE_SIZE);
/*
- * This is kinda brutal, but every single 512MB VM memory segment points to
- * the same first 512MB of physical memory. But it is more than adequate.
+ * This is kinda brutal, but every single 1GB VM memory segment points to
+ * the same first 1GB of physical memory. But it is more than adequate.
*/
for (i = 0; i < 512; i++) {
/* Each slot of the level 4 pages points to the same level 3 page */
/* Each slot of the level 3 pages points to the same level 2 page */
PT3[i] = (p3_entry_t)VTOP((uintptr_t)&PT2[0]);
PT3[i] |= PG_V | PG_RW | PG_U;
- }
- for (i = 0; i < 256; i++) {
+
/* The level 2 page slots are mapped with 2MB pages for 1GB. */
PT2[i] = i * (2 * 1024 * 1024);
PT2[i] |= PG_V | PG_RW | PG_PS | PG_U;
- PT2[256 + i] = i * (2 * 1024 * 1024);
- PT2[256 + i] |= PG_V | PG_RW | PG_PS | PG_U;
}
entry_lo = ehdr->e_entry & 0xffffffff;
panic("exec returned");
}
+
+static int
+elf64_obj_exec(struct preloaded_file *fp)
+{
+ return (EFTYPE);
+}
* rather than reading the file go first.
*/
extern struct file_format i386_elf;
+extern struct file_format i386_elf_obj;
extern struct file_format amd64_elf;
+extern struct file_format amd64_elf_obj;
struct file_format *file_formats[] = {
&i386_elf,
+ &i386_elf_obj,
&amd64_elf,
+ &amd64_elf_obj,
NULL
};
polachok's projects / dragonfly.git / commitdiff