Initial commit

libs/elf/src/elf.c

@@ -0,0 +1,383 @@
+/*
+ * Australian Public Licence B (OZPLB)
+ * 
+ * Version 1-0
+ * 
+ * Copyright (c) 2004 University of New South Wales
+ * 
+ * All rights reserved. 
+ * 
+ * Developed by: Operating Systems and Distributed Systems Group (DiSy)
+ *               University of New South Wales
+ *               http://www.disy.cse.unsw.edu.au
+ * 
+ * Permission is granted by University of New South Wales, free of charge, to
+ * any person obtaining a copy of this software and any associated
+ * documentation files (the "Software") to deal with the Software without
+ * restriction, including (without limitation) the rights to use, copy,
+ * modify, adapt, merge, publish, distribute, communicate to the public,
+ * sublicense, and/or sell, lend or rent out copies of the Software, and
+ * to permit persons to whom the Software is furnished to do so, subject
+ * to the following conditions:
+ * 
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimers.
+ * 
+ *     * Redistributions in binary form must reproduce the above
+ *       copyright notice, this list of conditions and the following
+ *       disclaimers in the documentation and/or other materials provided
+ *       with the distribution.
+ * 
+ *     * Neither the name of University of New South Wales, nor the names of its
+ *       contributors, may be used to endorse or promote products derived
+ *       from this Software without specific prior written permission.
+ * 
+ * EXCEPT AS EXPRESSLY STATED IN THIS LICENCE AND TO THE FULL EXTENT
+ * PERMITTED BY APPLICABLE LAW, THE SOFTWARE IS PROVIDED "AS-IS", AND
+ * NATIONAL ICT AUSTRALIA AND ITS CONTRIBUTORS MAKE NO REPRESENTATIONS,
+ * WARRANTIES OR CONDITIONS OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
+ * BUT NOT LIMITED TO ANY REPRESENTATIONS, WARRANTIES OR CONDITIONS
+ * REGARDING THE CONTENTS OR ACCURACY OF THE SOFTWARE, OR OF TITLE,
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, NONINFRINGEMENT,
+ * THE ABSENCE OF LATENT OR OTHER DEFECTS, OR THE PRESENCE OR ABSENCE OF
+ * ERRORS, WHETHER OR NOT DISCOVERABLE.
+ * 
+ * TO THE FULL EXTENT PERMITTED BY APPLICABLE LAW, IN NO EVENT SHALL
+ * NATIONAL ICT AUSTRALIA OR ITS CONTRIBUTORS BE LIABLE ON ANY LEGAL
+ * THEORY (INCLUDING, WITHOUT LIMITATION, IN AN ACTION OF CONTRACT,
+ * NEGLIGENCE OR OTHERWISE) FOR ANY CLAIM, LOSS, DAMAGES OR OTHER
+ * LIABILITY, INCLUDING (WITHOUT LIMITATION) LOSS OF PRODUCTION OR
+ * OPERATION TIME, LOSS, DAMAGE OR CORRUPTION OF DATA OR RECORDS; OR LOSS
+ * OF ANTICIPATED SAVINGS, OPPORTUNITY, REVENUE, PROFIT OR GOODWILL, OR
+ * OTHER ECONOMIC LOSS; OR ANY SPECIAL, INCIDENTAL, INDIRECT,
+ * CONSEQUENTIAL, PUNITIVE OR EXEMPLARY DAMAGES, ARISING OUT OF OR IN
+ * CONNECTION WITH THIS LICENCE, THE SOFTWARE OR THE USE OF OR OTHER
+ * DEALINGS WITH THE SOFTWARE, EVEN IF NATIONAL ICT AUSTRALIA OR ITS
+ * CONTRIBUTORS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH CLAIM, LOSS,
+ * DAMAGES OR OTHER LIABILITY.
+ * 
+ * If applicable legislation implies representations, warranties, or
+ * conditions, or imposes obligations or liability on University of New South
+ * Wales or one of its contributors in respect of the Software that
+ * cannot be wholly or partly excluded, restricted or modified, the
+ * liability of University of New South Wales or the contributor is limited, to
+ * the full extent permitted by the applicable legislation, at its
+ * option, to:
+ * a.  in the case of goods, any one or more of the following:
+ * i.  the replacement of the goods or the supply of equivalent goods;
+ * ii.  the repair of the goods;
+ * iii. the payment of the cost of replacing the goods or of acquiring
+ *  equivalent goods;
+ * iv.  the payment of the cost of having the goods repaired; or
+ * b.  in the case of services:
+ * i.  the supplying of the services again; or
+ * ii.  the payment of the cost of having the services supplied again.
+ * 
+ * The construction, validity and performance of this licence is governed
+ * by the laws in force in New South Wales, Australia.
+ */
+void *str;
+#include <elf/elf.h>
+#include <string.h>
+#include <stdio.h>
+
+/*
+ * Checks that elfFile points to a valid elf file. Returns 0 if the elf
+ * file is valid, < 0 if invalid. 
+ */
+
+#define ISELF32(elfFile) ( ((struct Elf32_Header*)elfFile)->e_ident[EI_CLASS] == ELFCLASS32 )
+#define ISELF64(elfFile) ( ((struct Elf64_Header*)elfFile)->e_ident[EI_CLASS] == ELFCLASS64 )
+
+int
+elf_checkFile(void *elfFile)
+{
+	return ISELF32 (elfFile)
+		? elf32_checkFile(elfFile)
+		: elf64_checkFile(elfFile);
+}
+
+/* Program Headers Access functions */
+uint16_t
+elf_getNumProgramHeaders(void *elfFile)
+{
+	return ISELF32 (elfFile)
+		? elf32_getNumProgramHeaders(elfFile)
+		: elf64_getNumProgramHeaders(elfFile);
+}
+
+uint32_t
+elf_getProgramHeaderFlags(void *elfFile, uint16_t ph)
+{
+	return ISELF32 (elfFile)
+		? elf32_getProgramHeaderFlags(elfFile, ph)
+		: elf64_getProgramHeaderFlags(elfFile, ph);
+}
+
+uint32_t
+elf_getProgramHeaderType(void *elfFile, uint16_t ph)
+{
+	return ISELF32 (elfFile)
+		? elf32_getProgramHeaderType(elfFile, ph)
+		: elf64_getProgramHeaderType(elfFile, ph);
+}
+
+uint64_t
+elf_getProgramHeaderPaddr(void *elfFile, uint16_t ph)
+{
+	return ISELF32 (elfFile)
+		? elf32_getProgramHeaderPaddr(elfFile, ph)
+		: elf64_getProgramHeaderPaddr(elfFile, ph);
+}
+
+uint64_t
+elf_getProgramHeaderVaddr(void *elfFile, uint16_t ph)
+{
+	return ISELF32 (elfFile)
+		? elf32_getProgramHeaderVaddr(elfFile, ph)
+		: elf64_getProgramHeaderVaddr(elfFile, ph);
+}
+
+uint64_t
+elf_getProgramHeaderMemorySize(void *elfFile, uint16_t ph)
+{
+	return ISELF32 (elfFile)
+		? elf32_getProgramHeaderMemorySize(elfFile, ph)
+		: elf64_getProgramHeaderMemorySize(elfFile, ph);
+}
+
+uint64_t
+elf_getProgramHeaderFileSize(void *elfFile, uint16_t ph)
+{
+	return ISELF32 (elfFile)
+		? elf32_getProgramHeaderFileSize(elfFile, ph)
+		: elf64_getProgramHeaderFileSize(elfFile, ph);
+}
+
+uint64_t
+elf_getProgramHeaderOffset(void *elfFile, uint16_t ph)
+{
+	return ISELF32 (elfFile)
+		? elf32_getProgramHeaderOffset(elfFile, ph)
+		: elf64_getProgramHeaderOffset(elfFile, ph);
+}
+
+char *
+elf_getSegmentStringTable(void *elfFile)
+{
+	return ISELF32 (elfFile)
+		? elf32_getSegmentStringTable(elfFile)
+		: elf64_getSegmentStringTable(elfFile);
+}
+
+char *
+elf_getStringTable(void *elfFile, int string_segment)
+{
+	return ISELF32 (elfFile)
+		? elf32_getStringTable(elfFile)
+		: elf64_getStringTable(elfFile, string_segment);
+}
+
+
+unsigned
+elf_getNumSections(void *elfFile)
+{
+	return ISELF32 (elfFile)
+		? elf32_getNumSections(elfFile)
+		: elf64_getNumSections(elfFile);
+}
+
+char *
+elf_getSectionName(void *elfFile, int i)
+{
+	return ISELF32 (elfFile)
+		? elf32_getSectionName(elfFile, i)
+		: elf64_getSectionName(elfFile, i);
+}
+
+uint32_t
+elf_getSectionFlags(void *elfFile, int i)
+{
+	return ISELF32 (elfFile)
+		? elf32_getSectionFlags(elfFile, i)
+		: elf64_getSectionFlags(elfFile, i);
+}
+
+uint32_t
+elf_getSectionType(void *elfFile, int i)
+{
+	return ISELF32 (elfFile)
+		? elf32_getSectionType(elfFile, i)
+		: elf64_getSectionType(elfFile, i);
+}
+
+uint64_t
+elf_getSectionSize(void *elfFile, int i)
+{
+	return ISELF32 (elfFile)
+		? elf32_getSectionSize(elfFile, i)
+		: elf64_getSectionSize(elfFile, i);
+}
+
+uint64_t
+elf_getSectionAddr(void *elfFile, int i)
+{
+	return ISELF32 (elfFile)
+		? elf32_getSectionAddr(elfFile, i)
+		: elf64_getSectionAddr(elfFile, i);
+}
+
+
+void *
+elf_getSection(void *elfFile, int i)
+{
+	return ISELF32 (elfFile)
+		? elf32_getSection(elfFile, i)
+		: elf64_getSection(elfFile, i);
+}
+
+void *
+elf_getSectionNamed(void *elfFile, char *_str)
+{
+	return ISELF32 (elfFile)
+		? elf32_getSectionNamed(elfFile, _str)
+		: elf64_getSectionNamed(elfFile, _str);
+}
+
+void
+elf_getProgramHeaderInfo(void *elfFile, uint16_t ph, uint64_t *p_vaddr, 
+			 uint64_t *p_paddr, uint64_t *p_filesz, uint64_t *p_offset, 
+			 uint64_t *p_memsz)
+{
+	*p_vaddr = elf_getProgramHeaderVaddr(elfFile, ph);
+	*p_paddr = elf_getProgramHeaderPaddr(elfFile, ph);
+	*p_filesz = elf_getProgramHeaderFileSize(elfFile, ph);
+	*p_offset = elf_getProgramHeaderOffset(elfFile, ph);
+	*p_memsz = elf_getProgramHeaderMemorySize(elfFile, ph);
+}
+
+uint64_t
+elf_getEntryPoint(void *elfFile)
+{
+	return ISELF32 (elfFile)
+		? elf32_getEntryPoint (elfFile)
+		: elf64_getEntryPoint (elfFile);
+}
+
+void
+elf_fprintf(FILE *f, void *file, int size, const char *name, int flags)
+{
+	elf32_fprintf(f, file, size, name, flags);
+
+}
+
+bool
+elf_getMemoryBounds(void *elfFile, bool phys, uint64_t *min, uint64_t *max)
+{
+	uint64_t mem_min = UINT64_MAX;
+	uint64_t mem_max = 0;
+	int i;
+
+	if (elf_checkFile(elfFile) != 0) {
+		return false;
+	}
+
+	for(i=0; i < elf_getNumProgramHeaders(elfFile); i++) {
+		uint64_t sect_min, sect_max;
+
+		if (elf_getProgramHeaderMemorySize(elfFile, i) == 0) {
+			continue;
+		}
+
+		if (phys) {
+			sect_min = elf_getProgramHeaderPaddr(elfFile, i);
+		} else {
+			sect_min = elf_getProgramHeaderVaddr(elfFile, i);
+		}
+
+		sect_max = sect_min + elf_getProgramHeaderMemorySize(elfFile, i);
+
+		if (sect_max > mem_max) {
+			mem_max = sect_max;
+		}
+		if (sect_min < mem_min) {
+			mem_min = sect_min;
+		}
+	}
+	*min = mem_min;
+	*max = mem_max;
+
+	return true;
+};
+
+bool
+elf_vaddrInProgramHeader(void *elfFile, uint16_t ph, uint64_t vaddr)
+{
+	uint64_t min = elf_getProgramHeaderVaddr(elfFile, ph);
+	uint64_t max = min + elf_getProgramHeaderMemorySize(elfFile, ph);
+	if (vaddr >= min && vaddr < max) {
+		return true;
+	} else {
+		return false;
+	}
+}
+
+uint64_t
+elf_vtopProgramHeader(void *elfFile, uint16_t ph, uint64_t vaddr)
+{
+	uint64_t ph_phys = elf_getProgramHeaderPaddr(elfFile, ph);
+	uint64_t ph_virt = elf_getProgramHeaderVaddr(elfFile, ph);
+	uint64_t paddr;
+
+	paddr = vaddr - ph_virt + ph_phys;
+
+	return paddr;
+}
+
+bool
+elf_loadFile(void *elfFile, bool phys)
+{
+	int i;
+	int num_pheaders;
+	int pheader_offset;
+	int pheader_type;
+	if (elf_checkFile(elfFile) != 0) {
+		return false;
+	}
+
+	num_pheaders = elf_getNumProgramHeaders(elfFile);
+	pheader_offset = elf_getProgramHeaderOffset(elfFile, 0);
+	//printf("Number of program headers: %d\n", num_pheaders);
+	//printf("Program header offset of first header from file beginning: 0x%p\n",pheader_offset);
+
+	for(i=0; i < num_pheaders; i++) {
+		/* Load that section */
+		uint64_t dest, src;
+		uint32_t clrsize;
+		size_t len;
+		if (phys) {
+			dest = elf_getProgramHeaderPaddr(elfFile, i);
+	//		printf("Elf file pheader physical: %p\n", dest);
+	//		printf("Elf file pheader virtual: %p\n",
+	//			elf_getProgramHeaderVaddr(elfFile,i));
+		} else {
+	//		printf("Elf file pheader virtual: %p\n", dest);
+			dest = elf_getProgramHeaderVaddr(elfFile, i);
+		}
+		len = elf_getProgramHeaderFileSize(elfFile, i);
+	//	printf("This section's size in file: %p\n", len);
+		src = (uint64_t) (uintptr_t) elfFile + elf_getProgramHeaderOffset(elfFile, i);
+	//	printf("Elf program header offset: %p\n", src);
+		pheader_type = elf_getProgramHeaderType(elfFile, i);
+	//	printf("Elf program header type: %p\n", pheader_type);
+	//	printf("Copying from %x to %x of size: %p\n", (unsigned int)src, (unsigned int)dest, len);
+		memcpy((void*) (uintptr_t) dest, (void*) (uintptr_t) src, len);
+		dest += len;
+		clrsize = elf_getProgramHeaderMemorySize(elfFile, i) - len;
+	//	printf("Clearing memory... starting from %x, size: %x\n", (unsigned int)dest, clrsize);
+		memset((void*) (uintptr_t) dest, 0, clrsize);
+	//	printf("Memory cleared.\n");
+	}
+
+	return true;
+}

libs/elf/src/elf32.c

@@ -0,0 +1,324 @@
+/*
+ * Australian Public Licence B (OZPLB)
+ * 
+ * Version 1-0
+ * 
+ * Copyright (c) 2004 University of New South Wales
+ * 
+ * All rights reserved. 
+ * 
+ * Developed by: Operating Systems and Distributed Systems Group (DiSy)
+ *               University of New South Wales
+ *               http://www.disy.cse.unsw.edu.au
+ * 
+ * Permission is granted by University of New South Wales, free of charge, to
+ * any person obtaining a copy of this software and any associated
+ * documentation files (the "Software") to deal with the Software without
+ * restriction, including (without limitation) the rights to use, copy,
+ * modify, adapt, merge, publish, distribute, communicate to the public,
+ * sublicense, and/or sell, lend or rent out copies of the Software, and
+ * to permit persons to whom the Software is furnished to do so, subject
+ * to the following conditions:
+ * 
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimers.
+ * 
+ *     * Redistributions in binary form must reproduce the above
+ *       copyright notice, this list of conditions and the following
+ *       disclaimers in the documentation and/or other materials provided
+ *       with the distribution.
+ * 
+ *     * Neither the name of University of New South Wales, nor the names of its
+ *       contributors, may be used to endorse or promote products derived
+ *       from this Software without specific prior written permission.
+ * 
+ * EXCEPT AS EXPRESSLY STATED IN THIS LICENCE AND TO THE FULL EXTENT
+ * PERMITTED BY APPLICABLE LAW, THE SOFTWARE IS PROVIDED "AS-IS", AND
+ * NATIONAL ICT AUSTRALIA AND ITS CONTRIBUTORS MAKE NO REPRESENTATIONS,
+ * WARRANTIES OR CONDITIONS OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
+ * BUT NOT LIMITED TO ANY REPRESENTATIONS, WARRANTIES OR CONDITIONS
+ * REGARDING THE CONTENTS OR ACCURACY OF THE SOFTWARE, OR OF TITLE,
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, NONINFRINGEMENT,
+ * THE ABSENCE OF LATENT OR OTHER DEFECTS, OR THE PRESENCE OR ABSENCE OF
+ * ERRORS, WHETHER OR NOT DISCOVERABLE.
+ * 
+ * TO THE FULL EXTENT PERMITTED BY APPLICABLE LAW, IN NO EVENT SHALL
+ * NATIONAL ICT AUSTRALIA OR ITS CONTRIBUTORS BE LIABLE ON ANY LEGAL
+ * THEORY (INCLUDING, WITHOUT LIMITATION, IN AN ACTION OF CONTRACT,
+ * NEGLIGENCE OR OTHERWISE) FOR ANY CLAIM, LOSS, DAMAGES OR OTHER
+ * LIABILITY, INCLUDING (WITHOUT LIMITATION) LOSS OF PRODUCTION OR
+ * OPERATION TIME, LOSS, DAMAGE OR CORRUPTION OF DATA OR RECORDS; OR LOSS
+ * OF ANTICIPATED SAVINGS, OPPORTUNITY, REVENUE, PROFIT OR GOODWILL, OR
+ * OTHER ECONOMIC LOSS; OR ANY SPECIAL, INCIDENTAL, INDIRECT,
+ * CONSEQUENTIAL, PUNITIVE OR EXEMPLARY DAMAGES, ARISING OUT OF OR IN
+ * CONNECTION WITH THIS LICENCE, THE SOFTWARE OR THE USE OF OR OTHER
+ * DEALINGS WITH THE SOFTWARE, EVEN IF NATIONAL ICT AUSTRALIA OR ITS
+ * CONTRIBUTORS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH CLAIM, LOSS,
+ * DAMAGES OR OTHER LIABILITY.
+ * 
+ * If applicable legislation implies representations, warranties, or
+ * conditions, or imposes obligations or liability on University of New South
+ * Wales or one of its contributors in respect of the Software that
+ * cannot be wholly or partly excluded, restricted or modified, the
+ * liability of University of New South Wales or the contributor is limited, to
+ * the full extent permitted by the applicable legislation, at its
+ * option, to:
+ * a.  in the case of goods, any one or more of the following:
+ * i.  the replacement of the goods or the supply of equivalent goods;
+ * ii.  the repair of the goods;
+ * iii. the payment of the cost of replacing the goods or of acquiring
+ *  equivalent goods;
+ * iv.  the payment of the cost of having the goods repaired; or
+ * b.  in the case of services:
+ * i.  the supplying of the services again; or
+ * ii.  the payment of the cost of having the services supplied again.
+ * 
+ * The construction, validity and performance of this licence is governed
+ * by the laws in force in New South Wales, Australia.
+ */
+#include <elf/elf.h>
+#include <string.h>
+#include <inttypes.h>
+
+int
+elf32_checkFile(struct Elf32_Header *file)
+{
+	if (file->e_ident[EI_MAG0] != ELFMAG0
+	    || file->e_ident[EI_MAG1] != ELFMAG1
+	    || file->e_ident[EI_MAG2] != ELFMAG2
+	    || file->e_ident[EI_MAG3] != ELFMAG3)
+		return -1;	/* not an elf file */
+	if (file->e_ident[EI_CLASS] != ELFCLASS32)
+		return -2;	/* not 32-bit file */
+	return 0;		/* elf file looks OK */
+}
+
+/*
+ * Returns the number of program segments in this elf file. 
+ */
+unsigned
+elf32_getNumSections(struct Elf32_Header *elfFile)
+{
+	return elfFile->e_shnum;
+}
+
+char *
+elf32_getStringTable(struct Elf32_Header *elfFile)
+{
+	struct Elf32_Shdr *sections = elf32_getSectionTable(elfFile);
+	return (char *)elfFile + sections[elfFile->e_shstrndx].sh_offset;
+}
+
+/* Returns a pointer to the program segment table, which is an array of
+ * ELF32_Phdr_t structs.  The size of the array can be found by calling
+ * getNumProgramSegments. */
+struct Elf32_Phdr *
+elf32_getProgramSegmentTable(struct Elf32_Header *elfFile)
+{
+	struct Elf32_Header *fileHdr = elfFile;
+	return (struct Elf32_Phdr *) (fileHdr->e_phoff + (long) elfFile);
+}
+
+/* Returns the number of program segments in this elf file. */
+uint16_t
+elf32_getNumProgramHeaders(struct Elf32_Header *elfFile)
+{
+	struct Elf32_Header *fileHdr = elfFile;
+	return fileHdr->e_phnum;
+}
+
+char *
+elf32_getSectionName(struct Elf32_Header *elfFile, int i)
+{
+	struct Elf32_Shdr *sections = elf32_getSectionTable(elfFile);
+	char *str_table = elf32_getSegmentStringTable(elfFile);
+	if (str_table == NULL) {
+		return "<corrupted>";
+	} else {
+		return str_table + sections[i].sh_name;
+	}
+}
+
+uint32_t
+elf32_getSectionSize(struct Elf32_Header *elfFile, int i)
+{
+	struct Elf32_Shdr *sections = elf32_getSectionTable(elfFile);
+	return sections[i].sh_size;
+}
+
+uint32_t
+elf32_getSectionAddr(struct Elf32_Header *elfFile, int i)
+{
+	struct Elf32_Shdr *sections = elf32_getSectionTable(elfFile);
+	return sections[i].sh_addr;
+}
+	
+void *
+elf32_getSection(struct Elf32_Header *elfFile, int i)
+{
+	struct Elf32_Shdr *sections = elf32_getSectionTable(elfFile);
+	return (char *)elfFile + sections[i].sh_offset;
+}
+
+void *
+elf32_getSectionNamed(struct Elf32_Header *elfFile, char *str)
+{
+	int numSections = elf32_getNumSections(elfFile);
+	int i;
+	for (i = 0; i < numSections; i++) {
+		if (strcmp(str, elf32_getSectionName(elfFile, i)) == 0) {
+			return elf32_getSection(elfFile, i);
+		}
+	}
+	return NULL;
+}
+
+char *
+elf32_getSegmentStringTable(struct Elf32_Header *elfFile)
+{
+	struct Elf32_Header *fileHdr = (struct Elf32_Header *) elfFile;
+	if (fileHdr->e_shstrndx == 0) {
+		return NULL;
+	} else {
+		return elf32_getStringTable(elfFile);
+	}
+}
+
+#ifdef ELF_DEBUG
+void
+elf32_printStringTable(struct Elf32_Header *elfFile)
+{
+	int counter;
+	struct Elf32_Shdr *sections = elf32_getSectionTable(elfFile);
+	char * stringTable;
+
+	if (!sections) {
+		printf("No sections.\n");
+		return;
+	}
+	
+	stringTable = ((void *)elfFile) + sections[elfFile->e_shstrndx].sh_offset;
+	
+	printf("File is %p; sections is %p; string table is %p\n", elfFile, sections, stringTable);
+
+	for (counter=0; counter < sections[elfFile->e_shstrndx].sh_size; counter++) {
+		printf("%02x %c ", stringTable[counter], 
+				stringTable[counter] >= 0x20 ? stringTable[counter] : '.');
+	}
+}
+#endif
+
+int
+elf32_getSegmentType (struct Elf32_Header *elfFile, int segment)
+{
+	return elf32_getProgramSegmentTable(elfFile)[segment].p_type;
+}
+
+void
+elf32_getSegmentInfo(struct Elf32_Header *elfFile, int segment, uint64_t *p_vaddr, uint64_t *p_addr, uint64_t *p_filesz, uint64_t *p_offset, uint64_t *p_memsz)
+{
+	struct Elf32_Phdr *segments;
+
+	segments = elf32_getProgramSegmentTable(elfFile);
+	*p_addr = segments[segment].p_paddr;
+	*p_vaddr = segments[segment].p_vaddr;
+	*p_filesz = segments[segment].p_filesz;
+	*p_offset = segments[segment].p_offset;
+	*p_memsz = segments[segment].p_memsz;
+}
+
+uint32_t
+elf32_getEntryPoint (struct Elf32_Header *elfFile)
+{
+	return elfFile->e_entry;
+}
+
+/*
+ * Debugging functions
+ */
+
+/*
+ * prints out some details of one elf file
+ */
+void
+elf32_fprintf(FILE *f, struct Elf32_Header *file, int size, const char *name, int flags)
+{
+	struct Elf32_Phdr *segments;
+	unsigned numSegments;
+	struct Elf32_Shdr *sections;
+	unsigned numSections;
+	int i, r;
+	char *str_table;
+
+	fprintf(f, "Found an elf32 file called \"%s\" located "
+		"at address 0x%p\n", name, file);
+
+	if ((r = elf32_checkFile(file)) != 0) {
+		char *magic = (char*) file;
+		fprintf(f, "Invalid elf file (%d)\n", r);
+		fprintf(f, "Magic is: %2.2hhx %2.2hhx %2.2hhx %2.2hhx\n",
+			magic[0], magic[1], magic[2], magic[3]);
+		return;
+	}
+
+
+	/*
+	 * get a pointer to the table of program segments 
+	 */
+	segments = elf32_getProgramHeaderTable(file);
+	numSegments = elf32_getNumProgramHeaders(file);
+
+	sections = elf32_getSectionTable(file);
+	numSections = elf32_getNumSections(file);
+
+	if ((uintptr_t) sections >  ((uintptr_t) file + size)) {
+		fprintf(f, "Corrupted elfFile..\n");
+		return;
+	}
+
+		/*
+		 * print out info about each section 
+		 */
+		
+	if (flags & ELF_PRINT_PROGRAM_HEADERS) {
+		/*
+		 * print out info about each program segment 
+		 */
+		fprintf(f, "Program Headers:\n");
+		fprintf(f, "  Type           Offset   VirtAddr   PhysAddr   "
+			"FileSiz MemSiz  Flg Align\n");
+		for (i = 0; i < numSegments; i++) {
+			if (segments[i].p_type != 1) {
+				fprintf(f, "segment %d is not loadable, "
+					"skipping\n", i);
+			} else {
+				fprintf(f, "  LOAD           0x%06" PRIx32 " 0x%08" PRIx32 " 0x%08" PRIx32  \
+				       " 0x%05" PRIx32" 0x%05" PRIx32 " %c%c%c 0x%04" PRIx32 "\n",
+				//fprintf(f, "  LOAD           0x%" PRIxPTR " 0x%" PRIxPTR " 0x%" PRIxPTR 
+				//	" 0x%" PRIxPTR" 0x%" PRIxPTR " %c%c%c 0x%" PRIxPTR "\n",
+					segments[i].p_offset, segments[i].p_vaddr,
+					segments[i].p_paddr,
+					segments[i].p_filesz, segments[i].p_memsz,
+					segments[i].p_flags & PF_R ? 'R' : ' ',
+					segments[i].p_flags & PF_W ? 'W' : ' ',
+					segments[i].p_flags & PF_X ? 'E' : ' ',
+					segments[i].p_align);
+			}
+		}
+	}
+	if (flags & ELF_PRINT_SECTIONS) {
+		str_table = elf32_getSegmentStringTable(file);
+
+		printf("Section Headers:\n");
+		printf("  [Nr] Name              Type            Addr     Off\n");
+		for (i = 0; i < numSections; i++) {
+			//if (elf_checkSection(file, i) == 0) {
+			fprintf(f, "[%2d] %s %x %x\n", i, elf32_getSectionName(file, i),
+				//fprintf(f, "[%2d] %-17.17s %-15.15s %x %x\n", i, elf32_getSectionName(file, i), " ", 
+				///fprintf(f, "%-17.17s %-15.15s %08x %06x\n", elf32_getSectionName(file, i), " "	/* sections[i].sh_type 
+				//									 */ ,
+				sections[i].sh_addr, sections[i].sh_offset);
+			//}
+		}
+	}
+}

libs/elf/src/elf64.c

@@ -0,0 +1,321 @@
+/*
+ * Australian Public Licence B (OZPLB)
+ * 
+ * Version 1-0
+ * 
+ * Copyright (c) 2004 University of New South Wales
+ * 
+ * All rights reserved. 
+ * 
+ * Developed by: Operating Systems and Distributed Systems Group (DiSy)
+ *               University of New South Wales
+ *               http://www.disy.cse.unsw.edu.au
+ * 
+ * Permission is granted by University of New South Wales, free of charge, to
+ * any person obtaining a copy of this software and any associated
+ * documentation files (the "Software") to deal with the Software without
+ * restriction, including (without limitation) the rights to use, copy,
+ * modify, adapt, merge, publish, distribute, communicate to the public,
+ * sublicense, and/or sell, lend or rent out copies of the Software, and
+ * to permit persons to whom the Software is furnished to do so, subject
+ * to the following conditions:
+ * 
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimers.
+ * 
+ *     * Redistributions in binary form must reproduce the above
+ *       copyright notice, this list of conditions and the following
+ *       disclaimers in the documentation and/or other materials provided
+ *       with the distribution.
+ * 
+ *     * Neither the name of University of New South Wales, nor the names of its
+ *       contributors, may be used to endorse or promote products derived
+ *       from this Software without specific prior written permission.
+ * 
+ * EXCEPT AS EXPRESSLY STATED IN THIS LICENCE AND TO THE FULL EXTENT
+ * PERMITTED BY APPLICABLE LAW, THE SOFTWARE IS PROVIDED "AS-IS", AND
+ * NATIONAL ICT AUSTRALIA AND ITS CONTRIBUTORS MAKE NO REPRESENTATIONS,
+ * WARRANTIES OR CONDITIONS OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
+ * BUT NOT LIMITED TO ANY REPRESENTATIONS, WARRANTIES OR CONDITIONS
+ * REGARDING THE CONTENTS OR ACCURACY OF THE SOFTWARE, OR OF TITLE,
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, NONINFRINGEMENT,
+ * THE ABSENCE OF LATENT OR OTHER DEFECTS, OR THE PRESENCE OR ABSENCE OF
+ * ERRORS, WHETHER OR NOT DISCOVERABLE.
+ * 
+ * TO THE FULL EXTENT PERMITTED BY APPLICABLE LAW, IN NO EVENT SHALL
+ * NATIONAL ICT AUSTRALIA OR ITS CONTRIBUTORS BE LIABLE ON ANY LEGAL
+ * THEORY (INCLUDING, WITHOUT LIMITATION, IN AN ACTION OF CONTRACT,
+ * NEGLIGENCE OR OTHERWISE) FOR ANY CLAIM, LOSS, DAMAGES OR OTHER
+ * LIABILITY, INCLUDING (WITHOUT LIMITATION) LOSS OF PRODUCTION OR
+ * OPERATION TIME, LOSS, DAMAGE OR CORRUPTION OF DATA OR RECORDS; OR LOSS
+ * OF ANTICIPATED SAVINGS, OPPORTUNITY, REVENUE, PROFIT OR GOODWILL, OR
+ * OTHER ECONOMIC LOSS; OR ANY SPECIAL, INCIDENTAL, INDIRECT,
+ * CONSEQUENTIAL, PUNITIVE OR EXEMPLARY DAMAGES, ARISING OUT OF OR IN
+ * CONNECTION WITH THIS LICENCE, THE SOFTWARE OR THE USE OF OR OTHER
+ * DEALINGS WITH THE SOFTWARE, EVEN IF NATIONAL ICT AUSTRALIA OR ITS
+ * CONTRIBUTORS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH CLAIM, LOSS,
+ * DAMAGES OR OTHER LIABILITY.
+ * 
+ * If applicable legislation implies representations, warranties, or
+ * conditions, or imposes obligations or liability on University of New South
+ * Wales or one of its contributors in respect of the Software that
+ * cannot be wholly or partly excluded, restricted or modified, the
+ * liability of University of New South Wales or the contributor is limited, to
+ * the full extent permitted by the applicable legislation, at its
+ * option, to:
+ * a.  in the case of goods, any one or more of the following:
+ * i.  the replacement of the goods or the supply of equivalent goods;
+ * ii.  the repair of the goods;
+ * iii. the payment of the cost of replacing the goods or of acquiring
+ *  equivalent goods;
+ * iv.  the payment of the cost of having the goods repaired; or
+ * b.  in the case of services:
+ * i.  the supplying of the services again; or
+ * ii.  the payment of the cost of having the services supplied again.
+ * 
+ * The construction, validity and performance of this licence is governed
+ * by the laws in force in New South Wales, Australia.
+ */
+#include <elf/elf.h>
+#include <string.h>
+
+int
+elf64_checkFile(void *elfFile)
+{
+	struct Elf64_Header *fileHdr = (struct Elf64_Header *) elfFile;
+	if (fileHdr->e_ident[EI_MAG0] != ELFMAG0
+	    || fileHdr->e_ident[EI_MAG1] != ELFMAG1
+	    || fileHdr->e_ident[EI_MAG2] != ELFMAG2
+	    || fileHdr->e_ident[EI_MAG3] != ELFMAG3)
+		return -1;	/* not an elf file */
+	if (fileHdr->e_ident[EI_CLASS] != ELFCLASS64)
+		return -2;	/* not 64-bit file */
+#if 0
+	if (fileHdr->e_ident[EI_DATA] != ELFDATA2LSB)
+		return -3;	/* not big-endian file */
+	if (fileHdr->e_ident[EI_VERSION] != 1)
+		return -4;	/* wrong version of elf */
+	if (fileHdr->e_machine != 8)
+		return -5;	/* wrong architecture (not MIPS) */
+	if (fileHdr->e_type != 2)
+		return -6;	/* not an executable program */
+	if (fileHdr->e_phentsize != sizeof(struct Elf64_Phdr))
+		return -7;	/* unexpected size of program segment
+				 * header */
+	if (fileHdr->e_phnum == 0)
+		return -8;	/* no program segments */
+	if ((fileHdr->e_flags & 0x7e) != 0)
+		return -9;	/* wrong flags (did you forgot to compile
+				 * with -mno-abicalls?) */
+#endif
+	return 0;		/* elf file looks OK */
+}
+
+struct Elf64_Phdr *
+elf64_getProgramSegmentTable(void *elfFile)
+/*
+ * Returns a pointer to the program segment table, which is an array of
+ * ELF64_Phdr_t structs.  The size of the array can be found by calling
+ * getNumProgramSegments. 
+ */
+{
+	struct Elf64_Header *fileHdr = (struct Elf64_Header *) elfFile;
+	return (struct Elf64_Phdr *) ((size_t)fileHdr->e_phoff + (size_t) elfFile);
+}
+
+unsigned
+elf64_getNumSections(void *elfFile)
+/*
+ * Returns the number of program segments in this elf file. 
+ */
+{
+	struct Elf64_Header *fileHdr = (struct Elf64_Header *) elfFile;
+	return fileHdr->e_shnum;
+}
+
+char           *
+elf64_getStringTable(void *elfFile, int string_segment)
+{
+	struct Elf64_Shdr *sections = elf64_getSectionTable(elfFile);
+	return (char *) elfFile + sections[string_segment].sh_offset;
+}
+
+char           *
+elf64_getSegmentStringTable(void *elfFile)
+{
+	struct Elf64_Header *fileHdr = (struct Elf64_Header *) elfFile;
+	if (fileHdr->e_shstrndx == 0) {
+		return NULL;
+	} else {
+		return elf64_getStringTable(elfFile, fileHdr->e_shstrndx);
+	}
+}
+
+char *
+elf64_getSectionName(void *elfFile, int i)
+{
+	struct Elf64_Shdr *sections = elf64_getSectionTable(elfFile);
+	char           *str_table = elf64_getSegmentStringTable(elfFile);
+	if (str_table == NULL) {
+		return "<corrupted>";
+	} else {
+		return str_table + sections[i].sh_name;
+	}
+}
+
+uint64_t
+elf64_getSectionSize(void *elfFile, int i)
+{
+	struct Elf64_Shdr *sections = elf64_getSectionTable(elfFile);
+	return sections[i].sh_size;
+}
+
+uint64_t
+elf64_getSectionAddr(struct Elf64_Header *elfFile, int i)
+{
+	struct Elf64_Shdr *sections = elf64_getSectionTable(elfFile);
+	return sections[i].sh_addr;
+}
+
+void           *
+elf64_getSection(void *elfFile, int i)
+{
+	struct Elf64_Shdr *sections = elf64_getSectionTable(elfFile);
+	return (char *)elfFile + sections[i].sh_offset;
+}
+
+void           *
+elf64_getSectionNamed(void *elfFile, char *str)
+{
+	int             numSections = elf64_getNumSections(elfFile);
+	int             i;
+	for (i = 0; i < numSections; i++) {
+		if (strcmp(str, elf64_getSectionName(elfFile, i)) == 0) {
+			return elf64_getSection(elfFile, i);
+		}
+	}
+	return NULL;
+}
+
+uint16_t
+elf64_getNumProgramHeaders(struct Elf64_Header *elfFile)
+{
+	return elfFile->e_phnum;
+}
+
+int
+elf64_getSegmentType (void *elfFile, int segment)
+{
+	return elf64_getProgramSegmentTable(elfFile)[segment].p_type;
+}
+
+void
+elf64_getSegmentInfo(void *elfFile, int segment, uint64_t *p_vaddr, 
+		     uint64_t *p_paddr, uint64_t *p_filesz, uint64_t *p_offset,
+		     uint64_t *p_memsz)
+{
+	struct Elf64_Phdr *segments;
+		
+	segments = elf64_getProgramSegmentTable(elfFile);
+	*p_vaddr = segments[segment].p_vaddr;
+	*p_paddr = segments[segment].p_paddr;
+	*p_filesz = segments[segment].p_filesz;
+	*p_offset = segments[segment].p_offset;
+	*p_memsz = segments[segment].p_memsz;
+}
+
+uint64_t
+elf64_getEntryPoint (struct Elf64_Header *elfFile)
+{
+	return elfFile->e_entry;
+}
+
+/*
+ * Debugging functions 
+ */
+
+#if 0
+/*
+ * prints out some details of one elf file 
+ */
+void
+elf64_showDetails(void *elfFile, int size, char *name)
+{
+	struct Elf64_Phdr *segments;
+	unsigned        numSegments;
+	struct Elf64_Shdr *sections;
+	unsigned        numSections;
+	int             i,
+	                r;
+	char           *str_table;
+
+	printf("Found an elf64 file called \"%s\" located "
+	       "at address 0x%lx\n", name, elfFile);
+
+	if ((r = elf64_checkFile(elfFile)) != 0) {
+		char           *magic = elfFile;
+		printf("Invalid elf file (%d)\n", r);
+		printf("Magic is: %02.2hhx %02.2hhx %02.2hhx %02.2hhx\n",
+		       magic[0], magic[1], magic[2], magic[3]);
+		return;
+	}
+
+	str_table = elf64_getSegmentStringTable(elfFile);
+
+	printf("Got str_table... %p\n", str_table);
+
+	/*
+	 * get a pointer to the table of program segments 
+	 */
+	segments = elf64_getProgramSegmentTable(elfFile);
+	numSegments = elf64_getNumProgramSegments(elfFile);
+
+	sections = elf64_getSectionTable(elfFile);
+	numSections = elf64_getNumSections(elfFile);
+
+	if ((void *) sections > (void *) elfFile + size ||
+	    (((uintptr_t) sections & 0xf) != 0)) {
+		printf("Corrupted elfFile..\n");
+		return;
+	}
+	printf("Sections: %p\n", sections);
+	/*
+	 * print out info about each section 
+	 */
+
+
+	/*
+	 * print out info about each program segment 
+	 */
+	printf("Program Headers:\n");
+	printf("  Type           Offset   VirtAddr   PhysAddr   "
+	       "FileSiz MemSiz  Flg Align\n");
+	for (i = 0; i < numSegments; i++) {
+
+		if (segments[i].p_type != 1) {
+			printf("segment %d is not loadable, "
+			       "skipping\n", i);
+		} else {
+			printf("  LOAD           0x%06lx 0x%08lx 0x%08lx"
+			       " 0x%05lx 0x%05lx %c%c%c 0x%04lx\n",
+			       segments[i].p_offset, segments[i].p_vaddr,
+			       segments[i].p_vaddr,
+			       segments[i].p_filesz, segments[i].p_memsz,
+			       segments[i].p_flags & PF_R ? 'R' : ' ',
+			       segments[i].p_flags & PF_W ? 'W' : ' ',
+			       segments[i].p_flags & PF_X ? 'E' : ' ',
+			       segments[i].p_align);
+		}
+	}
+
+	printf("Section Headers:\n");
+	printf("  [Nr] Name              Type            Addr     Off\n");
+	for (i = 0; i < numSections; i++) {
+		if (elf_checkSection(elfFile, i) == 0) {
+			printf("%-17.17s %-15.15s %08x %06x\n", elf64_getSectionName(elfFile, i), " "	/* sections[i].sh_type 
+													 */ ,
+			       sections[i].sh_addr, sections[i].sh_offset);
+		}
+	}
+}
+#endif