Imported Upstream version 0.8.13upstream

1 files changed, 407 insertions, 0 deletions

diff --git a/lib/gelftrans.c b/lib/gelftrans.c
new file mode 100644
index 0000000..dcd0cdd
--- /dev/null
+++ b/lib/gelftrans.c
@@ -0,0 +1,407 @@
+/*
+gelftrans.c - gelf_* translation functions.
+Copyright (C) 2000 - 2001 Michael Riepe
+
+This library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public
+License as published by the Free Software Foundation; either
+version 2 of the License, or (at your option) any later version.
+
+This library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with this library; if not, write to the Free Software
+Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
+*/
+
+#include <private.h>
+
+#if __LIBELF64
+
+#ifndef lint
+static const char rcsid[] = "@(#) $Id: gelftrans.c,v 1.10 2008/05/23 08:15:34 michael Exp $";
+#endif /* lint */
+
+#define check_and_copy(type, d, s, name, eret)		\
+    do {						\
+	if (sizeof((d)->name) < sizeof((s)->name)	\
+	 && (type)(s)->name != (s)->name) {		\
+	    seterr(ERROR_BADVALUE);			\
+	    return (eret);				\
+	}						\
+	(d)->name = (type)(s)->name;			\
+    } while (0)
+
+/*
+ * These macros are missing on some Linux systems
+ */
+#if !defined(ELF32_R_SYM) || !defined(ELF32_R_TYPE) || !defined(ELF32_R_INFO)
+# undef ELF32_R_SYM
+# undef ELF32_R_TYPE
+# undef ELF32_R_INFO
+# define ELF32_R_SYM(i)		((i)>>8)
+# define ELF32_R_TYPE(i)	((unsigned char)(i))
+# define ELF32_R_INFO(s,t)	(((s)<<8)+(unsigned char)(t))
+#endif /* !defined(...) */
+
+#if !defined(ELF64_R_SYM) || !defined(ELF64_R_TYPE) || !defined(ELF64_R_INFO)
+# undef ELF64_R_SYM
+# undef ELF64_R_TYPE
+# undef ELF64_R_INFO
+# define ELF64_R_SYM(i)		((i)>>32)
+# define ELF64_R_TYPE(i)	((i)&0xffffffffL)
+# define ELF64_R_INFO(s,t)	(((Elf64_Xword)(s)<<32)+((t)&0xffffffffL))
+#endif /* !defined(...) */
+
+static char*
+get_addr_and_class(const Elf_Data *data, int ndx, Elf_Type type, unsigned *cls) {
+    Scn_Data *sd = (Scn_Data*)data;
+    Elf_Scn *scn;
+    Elf *elf;
+    size_t n;
+
+    if (!sd) {
+	return NULL;
+    }
+    elf_assert(sd->sd_magic == DATA_MAGIC);
+    scn = sd->sd_scn;
+    elf_assert(scn);
+    elf_assert(scn->s_magic == SCN_MAGIC);
+    elf = scn->s_elf;
+    elf_assert(elf);
+    elf_assert(elf->e_magic == ELF_MAGIC);
+    if (elf->e_kind != ELF_K_ELF) {
+	seterr(ERROR_NOTELF);
+	return NULL;
+    }
+    if (!valid_class(elf->e_class)) {
+	seterr(ERROR_UNKNOWN_CLASS);
+	return NULL;
+    }
+    if (data->d_type != type) {
+	seterr(ERROR_BADTYPE);
+	return NULL;
+    }
+    n = _msize(elf->e_class, data->d_version, type);
+    if (n == 0) {
+	seterr(ERROR_UNIMPLEMENTED);
+	return NULL;
+    }
+    if (ndx < 0 || data->d_size < (ndx + 1) * n) {
+	seterr(ERROR_BADINDEX);
+	return NULL;
+    }
+    if (!data->d_buf) {
+	seterr(ERROR_NULLBUF);
+	return NULL;
+    }
+    if (cls) {
+	*cls = elf->e_class;
+    }
+    return (char*)data->d_buf + n * ndx;
+}
+
+GElf_Sym*
+gelf_getsym(Elf_Data *src, int ndx, GElf_Sym *dst) {
+    GElf_Sym buf;
+    unsigned cls;
+    char *tmp;
+
+    if (!dst) {
+	dst = &buf;
+    }
+    tmp = get_addr_and_class(src, ndx, ELF_T_SYM, &cls);
+    if (!tmp) {
+	return NULL;
+    }
+    if (cls == ELFCLASS64) {
+	*dst = *(Elf64_Sym*)tmp;
+    }
+    else if (cls == ELFCLASS32) {
+	Elf32_Sym *src = (Elf32_Sym*)tmp;
+
+	check_and_copy(GElf_Word,     dst, src, st_name,  NULL);
+	check_and_copy(unsigned char, dst, src, st_info,  NULL);
+	check_and_copy(unsigned char, dst, src, st_other, NULL);
+	check_and_copy(GElf_Half,     dst, src, st_shndx, NULL);
+	check_and_copy(GElf_Addr,     dst, src, st_value, NULL);
+	check_and_copy(GElf_Xword,    dst, src, st_size,  NULL);
+    }
+    else {
+	seterr(ERROR_UNIMPLEMENTED);
+	return NULL;
+    }
+    if (dst == &buf) {
+	dst = (GElf_Sym*)malloc(sizeof(GElf_Sym));
+	if (!dst) {
+	    seterr(ERROR_MEM_SYM);
+	    return NULL;
+	}
+	*dst = buf;
+    }
+    return dst;
+}
+
+int
+gelf_update_sym(Elf_Data *dst, int ndx, GElf_Sym *src) {
+    unsigned cls;
+    char *tmp;
+
+    tmp = get_addr_and_class(dst, ndx, ELF_T_SYM, &cls);
+    if (!tmp) {
+	return 0;
+    }
+    if (cls == ELFCLASS64) {
+	*(Elf64_Sym*)tmp = *src;
+    }
+    else if (cls == ELFCLASS32) {
+	Elf32_Sym *dst = (Elf32_Sym*)tmp;
+
+	check_and_copy(Elf32_Word,    dst, src, st_name,  0);
+	check_and_copy(Elf32_Addr,    dst, src, st_value, 0);
+	check_and_copy(Elf32_Word,    dst, src, st_size,  0);
+	check_and_copy(unsigned char, dst, src, st_info,  0);
+	check_and_copy(unsigned char, dst, src, st_other, 0);
+	check_and_copy(Elf32_Half,    dst, src, st_shndx, 0);
+    }
+    else {
+	seterr(ERROR_UNIMPLEMENTED);
+	return 0;
+    }
+    return 1;
+}
+
+GElf_Dyn*
+gelf_getdyn(Elf_Data *src, int ndx, GElf_Dyn *dst) {
+    GElf_Dyn buf;
+    unsigned cls;
+    char *tmp;
+
+    if (!dst) {
+	dst = &buf;
+    }
+    tmp = get_addr_and_class(src, ndx, ELF_T_DYN, &cls);
+    if (!tmp) {
+	return NULL;
+    }
+    if (cls == ELFCLASS64) {
+	*dst = *(Elf64_Dyn*)tmp;
+    }
+    else if (cls == ELFCLASS32) {
+	Elf32_Dyn *src = (Elf32_Dyn*)tmp;
+
+	check_and_copy(GElf_Sxword, dst, src, d_tag,      NULL);
+	check_and_copy(GElf_Xword,  dst, src, d_un.d_val, NULL);
+    }
+    else {
+	seterr(ERROR_UNIMPLEMENTED);
+	return NULL;
+    }
+    if (dst == &buf) {
+	dst = (GElf_Dyn*)malloc(sizeof(GElf_Dyn));
+	if (!dst) {
+	    seterr(ERROR_MEM_DYN);
+	    return NULL;
+	}
+	*dst = buf;
+    }
+    return dst;
+}
+
+int
+gelf_update_dyn(Elf_Data *dst, int ndx, GElf_Dyn *src) {
+    unsigned cls;
+    char *tmp;
+
+    tmp = get_addr_and_class(dst, ndx, ELF_T_DYN, &cls);
+    if (!tmp) {
+	return 0;
+    }
+    if (cls == ELFCLASS64) {
+	*(Elf64_Dyn*)tmp = *src;
+    }
+    else if (cls == ELFCLASS32) {
+	Elf32_Dyn *dst = (Elf32_Dyn*)tmp;
+
+	check_and_copy(Elf32_Sword, dst, src, d_tag,      0);
+	check_and_copy(Elf32_Word,  dst, src, d_un.d_val, 0);
+    }
+    else {
+	seterr(ERROR_UNIMPLEMENTED);
+	return 0;
+    }
+    return 1;
+}
+
+GElf_Rela*
+gelf_getrela(Elf_Data *src, int ndx, GElf_Rela *dst) {
+    GElf_Rela buf;
+    unsigned cls;
+    char *tmp;
+
+    if (!dst) {
+	dst = &buf;
+    }
+    tmp = get_addr_and_class(src, ndx, ELF_T_RELA, &cls);
+    if (!tmp) {
+	return NULL;
+    }
+    if (cls == ELFCLASS64) {
+	*dst = *(Elf64_Rela*)tmp;
+    }
+    else if (cls == ELFCLASS32) {
+	Elf32_Rela *src = (Elf32_Rela*)tmp;
+
+	check_and_copy(GElf_Addr,   dst, src, r_offset, NULL);
+	dst->r_info = ELF64_R_INFO((Elf64_Xword)ELF32_R_SYM(src->r_info),
+				   (Elf64_Xword)ELF32_R_TYPE(src->r_info));
+	check_and_copy(GElf_Sxword, dst, src, r_addend, NULL);
+    }
+    else {
+	seterr(ERROR_UNIMPLEMENTED);
+	return NULL;
+    }
+    if (dst == &buf) {
+	dst = (GElf_Rela*)malloc(sizeof(GElf_Rela));
+	if (!dst) {
+	    seterr(ERROR_MEM_RELA);
+	    return NULL;
+	}
+	*dst = buf;
+    }
+    return dst;
+}
+
+int
+gelf_update_rela(Elf_Data *dst, int ndx, GElf_Rela *src) {
+    unsigned cls;
+    char *tmp;
+
+    tmp = get_addr_and_class(dst, ndx, ELF_T_RELA, &cls);
+    if (!tmp) {
+	return 0;
+    }
+    if (cls == ELFCLASS64) {
+	*(Elf64_Rela*)tmp = *src;
+    }
+    else if (cls == ELFCLASS32) {
+	Elf32_Rela *dst = (Elf32_Rela*)tmp;
+
+	check_and_copy(Elf32_Addr,  dst, src, r_offset, 0);
+	if (ELF64_R_SYM(src->r_info) > 0xffffffUL
+	 || ELF64_R_TYPE(src->r_info) > 0xffUL) {
+	    seterr(ERROR_BADVALUE);
+	    return 0;
+	}
+	dst->r_info = ELF32_R_INFO((Elf32_Word)ELF64_R_SYM(src->r_info),
+				  (Elf32_Word)ELF64_R_TYPE(src->r_info));
+	check_and_copy(Elf32_Sword, dst, src, r_addend, 0);
+    }
+    else {
+	seterr(ERROR_UNIMPLEMENTED);
+	return 0;
+    }
+    return 1;
+}
+
+GElf_Rel*
+gelf_getrel(Elf_Data *src, int ndx, GElf_Rel *dst) {
+    GElf_Rel buf;
+    unsigned cls;
+    char *tmp;
+
+    if (!dst) {
+	dst = &buf;
+    }
+    tmp = get_addr_and_class(src, ndx, ELF_T_REL, &cls);
+    if (!tmp) {
+	return NULL;
+    }
+    if (cls == ELFCLASS64) {
+	*dst = *(Elf64_Rel*)tmp;
+    }
+    else if (cls == ELFCLASS32) {
+	Elf32_Rel *src = (Elf32_Rel*)tmp;
+
+	check_and_copy(GElf_Addr, dst, src, r_offset, NULL);
+	dst->r_info = ELF64_R_INFO((Elf64_Xword)ELF32_R_SYM(src->r_info),
+				   (Elf64_Xword)ELF32_R_TYPE(src->r_info));
+    }
+    else {
+	seterr(ERROR_UNIMPLEMENTED);
+	return NULL;
+    }
+    if (dst == &buf) {
+	dst = (GElf_Rel*)malloc(sizeof(GElf_Rel));
+	if (!dst) {
+	    seterr(ERROR_MEM_REL);
+	    return NULL;
+	}
+	*dst = buf;
+    }
+    return dst;
+}
+
+int
+gelf_update_rel(Elf_Data *dst, int ndx, GElf_Rel *src) {
+    unsigned cls;
+    char *tmp;
+
+    tmp = get_addr_and_class(dst, ndx, ELF_T_REL, &cls);
+    if (!tmp) {
+	return 0;
+    }
+    if (cls == ELFCLASS64) {
+	*(Elf64_Rel*)tmp = *src;
+    }
+    else if (cls == ELFCLASS32) {
+	Elf32_Rel *dst = (Elf32_Rel*)tmp;
+
+	check_and_copy(Elf32_Addr, dst, src, r_offset, 0);
+	if (ELF64_R_SYM(src->r_info) > 0xffffffUL
+	 || ELF64_R_TYPE(src->r_info) > 0xffUL) {
+	    seterr(ERROR_BADVALUE);
+	    return 0;
+	}
+	dst->r_info = ELF32_R_INFO((Elf32_Word)ELF64_R_SYM(src->r_info),
+				   (Elf32_Word)ELF64_R_TYPE(src->r_info));
+    }
+    else {
+	seterr(ERROR_UNIMPLEMENTED);
+	return 0;
+    }
+    return 1;
+}
+
+#if 0
+
+GElf_Syminfo*
+gelf_getsyminfo(Elf_Data *src, int ndx, GElf_Syminfo *dst) {
+    seterr(ERROR_UNIMPLEMENTED);
+    return NULL;
+}
+
+int
+gelf_update_syminfo(Elf_Data *dst, int ndx, GElf_Syminfo *src) {
+    seterr(ERROR_UNIMPLEMENTED);
+    return 0;
+}
+
+GElf_Move*
+gelf_getmove(Elf_Data *src, int ndx, GElf_Move *src) {
+    seterr(ERROR_UNIMPLEMENTED);
+    return NULL;
+}
+
+int
+gelf_update_move(Elf_Data *dst, int ndx, GElf_Move *src) {
+    seterr(ERROR_UNIMPLEMENTED);
+    return 0;
+}
+
+#endif
+
+#endif /* __LIBELF64 */