Add support for Visual Studio 2019

external/libelf/src/gelfphdr.c

@@ -0,0 +1,148 @@
+/*
+ * gelfphdr.c - gelf_* translation functions.
+ * Copyright (C) 2000 - 2006 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: gelfphdr.c,v 1.9 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)
+
+GElf_Phdr*
+gelf_getphdr(Elf *elf, int ndx, GElf_Phdr *dst) {
+    GElf_Phdr buf;
+    char *tmp;
+    size_t n;
+
+    if (!elf) {
+	return NULL;
+    }
+    elf_assert(elf->e_magic == ELF_MAGIC);
+    tmp = _elf_getphdr(elf, elf->e_class);
+    if (!tmp) {
+	return NULL;
+    }
+    if (ndx < 0 || ndx >= elf->e_phnum) {
+	seterr(ERROR_BADINDEX);
+	return NULL;
+    }
+    n = _msize(elf->e_class, _elf_version, ELF_T_PHDR);
+    if (n == 0) {
+	seterr(ERROR_UNIMPLEMENTED);
+	return NULL;
+    }
+    if (!dst) {
+	dst = &buf;
+    }
+    if (elf->e_class == ELFCLASS64) {
+	*dst = *(Elf64_Phdr*)(tmp + ndx * n);
+    }
+    else if (elf->e_class == ELFCLASS32) {
+	Elf32_Phdr *src = (Elf32_Phdr*)(tmp + ndx * n);
+
+	check_and_copy(GElf_Word,  dst, src, p_type,   NULL);
+	check_and_copy(GElf_Word,  dst, src, p_flags,  NULL);
+	check_and_copy(GElf_Off,   dst, src, p_offset, NULL);
+	check_and_copy(GElf_Addr,  dst, src, p_vaddr,  NULL);
+	check_and_copy(GElf_Addr,  dst, src, p_paddr,  NULL);
+	check_and_copy(GElf_Xword, dst, src, p_filesz, NULL);
+	check_and_copy(GElf_Xword, dst, src, p_memsz,  NULL);
+	check_and_copy(GElf_Xword, dst, src, p_align,  NULL);
+    }
+    else {
+	if (valid_class(elf->e_class)) {
+	    seterr(ERROR_UNIMPLEMENTED);
+	}
+	else {
+	    seterr(ERROR_UNKNOWN_CLASS);
+	}
+	return NULL;
+    }
+    if (dst == &buf) {
+	dst = (GElf_Phdr*)malloc(sizeof(GElf_Phdr));
+	if (!dst) {
+	    seterr(ERROR_MEM_PHDR);
+	    return NULL;
+	}
+	*dst = buf;
+    }
+    return dst;
+}
+
+int
+gelf_update_phdr(Elf *elf, int ndx, GElf_Phdr *src) {
+    char *tmp;
+    size_t n;
+
+    if (!elf || !src) {
+	return 0;
+    }
+    elf_assert(elf->e_magic == ELF_MAGIC);
+    tmp = _elf_getphdr(elf, elf->e_class);
+    if (!tmp) {
+	return 0;
+    }
+    if (ndx < 0 || ndx >= elf->e_phnum) {
+	seterr(ERROR_BADINDEX);
+	return 0;
+    }
+    n = _msize(elf->e_class, _elf_version, ELF_T_PHDR);
+    if (n == 0) {
+	seterr(ERROR_UNIMPLEMENTED);
+	return 0;
+    }
+    if (elf->e_class == ELFCLASS64) {
+	*(Elf64_Phdr*)(tmp + ndx * n) = *src;
+    }
+    else if (elf->e_class == ELFCLASS32) {
+	Elf32_Phdr *dst = (Elf32_Phdr*)(tmp + ndx * n);
+
+	check_and_copy(Elf32_Word, dst, src, p_type,   0);
+	check_and_copy(Elf32_Off,  dst, src, p_offset, 0);
+	check_and_copy(Elf32_Addr, dst, src, p_vaddr,  0);
+	check_and_copy(Elf32_Addr, dst, src, p_paddr,  0);
+	check_and_copy(Elf32_Word, dst, src, p_filesz, 0);
+	check_and_copy(Elf32_Word, dst, src, p_memsz,  0);
+	check_and_copy(Elf32_Word, dst, src, p_flags,  0);
+	check_and_copy(Elf32_Word, dst, src, p_align,  0);
+    }
+    else {
+	if (valid_class(elf->e_class)) {
+	    seterr(ERROR_UNIMPLEMENTED);
+	}
+	else {
+	    seterr(ERROR_UNKNOWN_CLASS);
+	}
+	return 0;
+    }
+    return 1;
+}
+
+#endif /* __LIBELF64 */