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elf2flt.c
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elf2flt.c
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/*
* elf2flt.c: Convert ELF (or any BFD format) to FLAT binary format
*
* (c) 1999-2002, Greg Ungerer <gerg@snapgear.com>
* Created elf2flt from coff2flt (see copyrights below). Added all the
* ELF format file handling. Extended relocation support for all of
* text and data.
*
* (c) 2008-2009, Xtensa support, Oskar Schirmer <os@emlix.com>
* (c) 2006 Support the -a (use_resolved) option for TARGET_arm.
* Shaun Jackman <sjackman@gmail.com>
* (c) 2004, Nios II support, Wentao Xu <wentao@microtronix.com>
* (c) 2003, H8 support, ktrace <davidm@snapgear.com>
* (c) 2003-2004, MicroBlaze support, John Williams <jwilliams@itee.uq.edu.au>
* (c) 2001-2003, arm/arm-pic/arm-big-endian support <davidm@snapgear.com>
* (c) 2001, v850 changes, Mile Bader <miles@lsi.nec.co.jp>
* (c) 2003, SuperH support, Paul Mundt <lethal@linux-sh.org>
* (c) 2001, zflat support <davidm@snapgear.com>
* (c) 2001, Changes for GOT entries Paul Dale <pauli@snapgear.com> and
* David McCullough <davidm@snapgear.com>
*
* Now supports PIC with GOT tables. This works by taking a '.elf' file
* and a fully linked elf executable (at address 0) and produces a flat
* file that can be loaded with some fixups. It still supports the old
* style fully relocatable elf format files.
*
* Originally obj-res.c
*
* (c) 1998, Kenneth Albanowski <kjahds@kjahds.com>
* (c) 1998, D. Jeff Dionne
* (c) 1998, The Silver Hammer Group Ltd.
* (c) 1996, 1997 Dionne & Associates <jeff@ryeham.ee.ryerson.ca>
*
* This is Free Software, under the GNU Public Licence v2 or greater.
*
* Relocation added March 1997, Kresten Krab Thorup
* krab@california.daimi.aau.dk
*/
#include <inttypes.h> /* All the standard PRI define times for printf */
#include <stdio.h> /* Userland pieces of the ANSI C standard I/O package */
#include <stdlib.h> /* Userland prototypes of the ANSI C std lib functions */
#include <stdarg.h> /* Allows va_list to exist in the these namespaces */
#include <string.h> /* Userland prototypes of the string handling funcs */
#include <strings.h>
#include <unistd.h> /* Userland prototypes of the Unix std system calls */
#include <fcntl.h> /* Flag value for file handling functions */
#include <time.h>
#include <errno.h>
/* from $(INSTALLDIR)/include */
#include <bfd.h> /* Main header file for the BFD library */
#include <libiberty.h>
#include "stubs.h"
const char *elf2flt_progname;
/* Include the right header file for the R_xxx defines. */
#if defined(TARGET_arm)
#include <elf/arm.h>
#elif defined(TARGET_bfin)
#include <elf/bfin.h>
#elif defined(TARGET_h8300)
#include <elf/h8.h>
#elif defined(TARGET_m68k)
#include <elf/m68k.h>
#elif defined(TARGET_microblaze)
#include <elf/microblaze.h>
#elif defined(TARGET_nios) || defined(TARGET_nios2)
/* Altera NIOS specific definitions. */
#define FLAT_NIOS2_R_32 0 /* Normal 32-bit reloc */
#define FLAT_NIOS2_R_HI_LO 1
#define FLAT_NIOS2_R_HIADJ_LO 2
#define FLAT_NIOS2_R_CALL26 4
#include <elf/nios2.h>
#elif defined(TARGET_sh)
#include <elf/sh.h>
#elif defined(TARGET_sparc)
#include <elf/sparc.h>
#elif defined(TARGET_v850)
#include <elf/v850.h>
#elif defined(TARGET_xtensa)
#include <elf/xtensa.h>
#elif defined(TARGET_riscv64) || defined(TARGET_riscv32)
#include <elf/riscv.h>
#endif
#if defined(__MINGW32__)
#include <getopt.h>
#endif
/* from uClinux-x.x.x/include/linux */
#include "flat.h" /* Binary flat header description */
#include "compress.h"
#ifdef TARGET_e1
#include <e1.h>
#endif
#ifdef TARGET_v850e
#define TARGET_v850
#endif
#if defined(TARGET_m68k)
#define ARCH "m68k/coldfire"
#elif defined(TARGET_arm)
#define ARCH "arm"
#elif defined(TARGET_sparc)
#define ARCH "sparc"
#elif defined(TARGET_v850)
#define ARCH "v850"
#elif defined(TARGET_sh)
#define ARCH "sh"
#elif defined(TARGET_h8300)
#define ARCH "h8300"
#elif defined(TARGET_microblaze)
#define ARCH "microblaze"
#elif defined(TARGET_e1)
#define ARCH "e1-coff"
#elif defined(TARGET_bfin)
#define ARCH "bfin"
#elif defined(TARGET_nios)
#define ARCH "nios"
#elif defined(TARGET_nios2)
#define ARCH "nios2"
#elif defined(TARGET_xtensa)
#define ARCH "xtensa"
#elif defined(TARGET_riscv64)
#define ARCH "riscv64"
#elif defined(TARGET_riscv32)
#define ARCH "riscv32"
#else
#error "Don't know how to support your CPU architecture??"
#endif
#if defined(TARGET_m68k) || defined(TARGET_h8300) || defined(TARGET_bfin)
/*
* Define a maximum number of bytes allowed in the offset table.
* We'll fail if the table is larger than this.
*
* This limit may be different for platforms other than m68k, but
* 8000 entries is a lot, trust me :-) (davidm)
*/
#define GOT_LIMIT 32767
/*
* we have to mask out the shared library id here and there, this gives
* us the real address bits when needed
*/
#define real_address_bits(x) (pic_with_got ? ((x) & 0xffffff) : (x))
#else
#define real_address_bits(x) (x)
#endif
#ifndef O_BINARY
#define O_BINARY 0
#endif
/*
* The bfd parameter isn't actually used by any of the bfd_section funcs and
* have been removed since binutils 2.34.
*/
#ifdef HAVE_BFD_SECTION_API_TAKES_BFD
#define elf2flt_bfd_section_size(s) bfd_section_size(NULL, s)
#define elf2flt_bfd_section_vma(s) bfd_section_vma(NULL, s)
#else
#define elf2flt_bfd_section_size(s) bfd_section_size(s)
#define elf2flt_bfd_section_vma(s) bfd_section_vma(s)
#endif
/* Extra output when running. */
static int verbose = 0;
/* Do ELF/GOT processing with PIC code. */
static int pic_with_got = 0;
/* Instruct loader to allocate everything into RAM. */
static int load_to_ram = 0;
/* Instruct kernel loader to output debug/trace info when loading. */
static int ktrace = 0;
/* 1 = compress everything, 2 = compress data only. */
static int docompress = 0;
/* If true, get the value of symbol references from the program contents,
not from the relocation table. In this case, the input ELF file must
be already fully resolved (using the `-q' flag with recent versions of
GNU ld will give you a fully resolved output file with relocation
entries). */
static int use_resolved = 0;
/* Set if the text section contains any relocations. If it does, we must
set the load_to_ram flag. */
static int text_has_relocs = 0;
static asymbol **
get_symbols (bfd *abfd, long *num)
{
int32_t storage_needed;
asymbol **symbol_table;
long number_of_symbols;
storage_needed = bfd_get_symtab_upper_bound (abfd);
if (storage_needed < 0)
abort ();
if (storage_needed == 0)
return NULL;
symbol_table = xmalloc (storage_needed);
number_of_symbols = bfd_canonicalize_symtab (abfd, symbol_table);
if (number_of_symbols < 0)
abort ();
*num = number_of_symbols;
return symbol_table;
}
static int
dump_symbols(asymbol **symbol_table, long number_of_symbols)
{
long i;
printf("SYMBOL TABLE:\n");
for (i=0; i<number_of_symbols; i++) {
printf(" NAME=%s VALUE=0x%"PRIx64"\n",
symbol_table[i]->name, (uint64_t) symbol_table[i]->value);
}
printf("\n");
return(0);
}
#if !defined TARGET_e1 && !defined TARGET_bfin
static long
get_symbol_offset(char *name, asection *sec, asymbol **symbol_table, long number_of_symbols)
{
long i;
for (i=0; i<number_of_symbols; i++) {
if (symbol_table[i]->section == sec) {
if (!strcmp(symbol_table[i]->name, name)) {
return symbol_table[i]->value;
}
}
}
return -1;
}
#endif
#ifdef TARGET_nios2
static long
get_gp_value(asymbol **symbol_table, long number_of_symbols)
{
long i;
for (i=0; i<number_of_symbols; i++) {
if (!strcmp(symbol_table[i]->name, "_gp"))
return symbol_table[i]->value;
}
return -1;
}
#endif
static int32_t
add_com_to_bss(asymbol **symbol_table, int32_t number_of_symbols, int32_t bss_len)
{
int32_t i, comsize;
int32_t offset;
comsize = 0;
for (i=0; i<number_of_symbols; i++) {
if (strcmp("*COM*", symbol_table[i]->section->name) == 0) {
offset = bss_len + comsize;
comsize += symbol_table[i]->value;
symbol_table[i]->value = offset;
}
}
return comsize;
}
#ifdef TARGET_bfin
/* FUNCTION : weak_und_symbol
ABSTRACT : return true if symbol is weak and undefined.
*/
static int
weak_und_symbol(const char *reloc_section_name,
struct bfd_symbol *symbol)
{
if (!(strstr (reloc_section_name, "text")
|| strstr (reloc_section_name, "data")
|| strstr (reloc_section_name, "bss"))) {
if (symbol->flags & BSF_WEAK) {
#ifdef DEBUG_BFIN
fprintf(stderr, "found weak undefined symbol %s\n", symbol->name);
#endif
return TRUE;
}
}
return FALSE;
}
static int
bfin_set_reloc (uint32_t *reloc,
const char *reloc_section_name,
const char *sym_name,
struct bfd_symbol *symbol,
int sp, int32_t offset)
{
unsigned int type = 0;
uint32_t val;
if (strstr (reloc_section_name, "stack")) {
if (verbose)
printf("Stack-relative reloc, offset %08"PRIx32"\n", offset);
/* This must be a stack_start reloc for stack checking. */
type = 1;
}
val = (offset & ((1 << 26) - 1));
val |= (sp & ((1 << 3) - 1)) << 26;
val |= type << 29;
*reloc = val;
return 0;
}
static bfd *compare_relocs_bfd;
static int
compare_relocs (const void *pa, const void *pb)
{
const arelent *const *a = pa, *const *b = pb;
const arelent *ra = *a, *rb = *b;
unsigned long va, vb;
uint32_t a_vma, b_vma;
if (!ra->sym_ptr_ptr || !*ra->sym_ptr_ptr)
return -1;
else if (!rb->sym_ptr_ptr || !*rb->sym_ptr_ptr)
return 1;
a_vma = elf2flt_bfd_section_vma((*(ra->sym_ptr_ptr))->section);
b_vma = elf2flt_bfd_section_vma((*(rb->sym_ptr_ptr))->section);
va = (*(ra->sym_ptr_ptr))->value + a_vma + ra->addend;
vb = (*(rb->sym_ptr_ptr))->value + b_vma + rb->addend;
return va - vb;
}
#endif
static uint32_t *
output_relocs (
bfd *abs_bfd,
asymbol **symbols,
int number_of_symbols,
uint32_t *n_relocs,
unsigned char *text, int text_len, uint32_t text_vma,
unsigned char *data, int data_len, uint32_t data_vma,
bfd *rel_bfd)
{
uint32_t *flat_relocs;
asection *a, *sym_section, *r;
arelent **relpp, **p, *q;
const char *sym_name, *section_name;
unsigned char *sectionp;
unsigned long pflags;
char addstr[20];
uint32_t sym_addr, sym_vma, section_vma;
int relsize, relcount;
int flat_reloc_count;
int sym_reloc_size, rc;
int got_size = 0;
int bad_relocs = 0;
asymbol **symb;
long nsymb;
#ifdef TARGET_bfin
unsigned long persistent_data = 0;
#endif
#if 0
printf("%s(%d): output_relocs(abs_bfd=%d,symbols=0x%x,number_of_symbols=%d,"
"n_relocs=0x%x,text=0x%x,text_len=%d,data=0x%x,data_len=%d)\n",
__FILE__, __LINE__, abs_bfd, symbols, number_of_symbols, n_relocs,
text, text_len, data, data_len);
#endif
if (0)
dump_symbols(symbols, number_of_symbols);
*n_relocs = 0;
flat_relocs = NULL;
flat_reloc_count = 0;
sym_reloc_size = 0;
rc = 0;
pflags = 0;
/* Silence gcc warnings */
(void) pflags;
(void) sym_vma;
/* Determine how big our offset table is in bytes.
* This isn't too difficult as we've terminated the table with -1.
* Also note that both the relocatable and absolute versions have this
* terminator even though the relocatable one doesn't have the GOT!
*/
if (pic_with_got && !use_resolved) {
uint32_t *lp = (uint32_t *)data;
/* Should call ntohl(*lp) here but is isn't going to matter */
while (*lp != 0xffffffff) lp++;
got_size = ((unsigned char *)lp) - data;
if (verbose)
printf("GOT table contains %zu entries (%d bytes)\n",
got_size/sizeof(uint32_t), got_size);
#ifdef TARGET_m68k
if (got_size > GOT_LIMIT)
fatal("GOT too large: %d bytes (limit = %d bytes)",
got_size, GOT_LIMIT);
#endif
}
for (a = abs_bfd->sections; (a != (asection *) NULL); a = a->next) {
section_vma = elf2flt_bfd_section_vma(a);
if (verbose)
printf("SECTION: %s [%p]: flags=0x%x vma=0x%"PRIx32"\n",
a->name, a, a->flags, section_vma);
// if (bfd_is_abs_section(a))
// continue;
if (bfd_is_und_section(a))
continue;
if (bfd_is_com_section(a))
continue;
// if ((a->flags & SEC_RELOC) == 0)
// continue;
/*
* Only relocate things in the writable data sections if we are PIC/GOT.
* Otherwise do text (and read only data) as well.
*/
if ((!pic_with_got || ALWAYS_RELOC_TEXT) && (a->flags & SEC_CODE))
sectionp = text + (a->vma - text_vma);
else if (a->flags & SEC_DATA)
sectionp = data + (a->vma - data_vma);
else
continue;
/* Now search for the equivalent section in the relocation binary
* and use that relocation information to build reloc entries
* for this one.
*/
for (r=rel_bfd->sections; r != NULL; r=r->next)
if (strcmp(a->name, r->name) == 0)
break;
if (r == NULL)
continue;
if (verbose)
printf(" RELOCS: %s [%p]: flags=0x%x vma=0x%"PRIx64"\n",
r->name, r, r->flags, (uint64_t) elf2flt_bfd_section_vma(r));
if ((r->flags & SEC_RELOC) == 0)
continue;
relsize = bfd_get_reloc_upper_bound(rel_bfd, r);
if (relsize <= 0) {
if (verbose)
printf("%s(%d): no relocation entries section=%s\n",
__FILE__, __LINE__, r->name);
continue;
}
symb = get_symbols(rel_bfd, &nsymb);
relpp = xmalloc(relsize);
relcount = bfd_canonicalize_reloc(rel_bfd, r, relpp, symb);
if (relcount <= 0) {
if (verbose)
printf("%s(%d): no relocation entries section=%s\n",
__FILE__, __LINE__, r->name);
continue;
} else {
#ifdef TARGET_bfin
compare_relocs_bfd = abs_bfd;
qsort (relpp, relcount, sizeof *relpp, compare_relocs);
#endif
for (p = relpp; (relcount && (*p != NULL)); p++, relcount--) {
unsigned char *r_mem = NULL;
int relocation_needed = 0;
/* Do we need to update the text segment? By default yes if not pic_with_got */
int update_text = !pic_with_got;
#ifdef TARGET_v850
/* Skip this relocation entirely if possible (we
do this early, before doing any other
processing on it). */
switch ((*p)->howto->type) {
case R_V850_9_PCREL:
case R_V850_22_PCREL:
case R_V850_SDA_16_16_OFFSET:
case R_V850_SDA_15_16_OFFSET:
case R_V850_ZDA_15_16_OFFSET:
case R_V850_TDA_6_8_OFFSET:
case R_V850_TDA_7_8_OFFSET:
case R_V850_TDA_7_7_OFFSET:
case R_V850_TDA_16_16_OFFSET:
case R_V850_TDA_4_5_OFFSET:
case R_V850_TDA_4_4_OFFSET:
case R_V850_SDA_16_16_SPLIT_OFFSET:
case R_V850_CALLT_6_7_OFFSET:
case R_V850_CALLT_16_16_OFFSET:
/* These are relative relocations, which
have already been fixed up by the
linker at this point, so just ignore
them. */
continue;
}
#endif /* USE_V850_RELOCS */
q = *p;
if (q->sym_ptr_ptr && *q->sym_ptr_ptr) {
sym_name = (*(q->sym_ptr_ptr))->name;
sym_section = (*(q->sym_ptr_ptr))->section;
section_name=(*(q->sym_ptr_ptr))->section->name;
} else {
printf("ERROR: undefined relocation entry\n");
rc = -1;
continue;
}
#ifndef TARGET_bfin
/* Adjust the address to account for the GOT table which wasn't
* present in the relative file link.
*/
if (pic_with_got && !use_resolved)
q->address += got_size;
#endif
/* A pointer to what's being relocated, used often
below. */
r_mem = sectionp + q->address;
/*
* Fixup offset in the actual section.
*/
addstr[0] = 0;
#if !defined TARGET_e1 && !defined TARGET_bfin
if ((sym_addr = get_symbol_offset((char *) sym_name,
sym_section, symbols, number_of_symbols)) == -1) {
sym_addr = 0;
}
#else
sym_addr = (*(q->sym_ptr_ptr))->value;
#endif
if (use_resolved) {
/* Use the address of the symbol already in
the program text. How this is handled may
still depend on the particular relocation
though. */
switch (q->howto->type) {
#ifdef TARGET_v850
int r2_type;
case R_V850_HI16_S:
/* We specially handle adjacent
HI16_S/ZDA_15_16_OFFSET and
HI16_S/LO16 pairs that reference the
same address (these are usually
movhi/ld and movhi/movea pairs,
respectively). */
if (relcount == 0)
r2_type = R_V850_NONE;
else
r2_type = p[1]->howto->type;
if ((r2_type == R_V850_ZDA_15_16_OFFSET
|| r2_type == R_V850_LO16)
&& (p[0]->sym_ptr_ptr
== p[1]->sym_ptr_ptr)
&& (p[0]->addend == p[1]->addend))
{
relocation_needed = 1;
switch (r2_type) {
case R_V850_ZDA_15_16_OFFSET:
pflags = 0x10000000;
break;
case R_V850_LO16:
pflags = 0x20000000;
break;
}
/* We don't really need the
actual value -- the bits
produced by the linker are
what we want in the final
flat file -- but get it
anyway if useful for
debugging. */
if (verbose) {
unsigned char *r2_mem =
sectionp
+ p[1]->address;
/* little-endian */
int hi = r_mem[0]
+ (r_mem[1] << 8);
int lo = r2_mem[0]
+ (r2_mem[1] << 8);
/* Sign extend LO. */
lo = (lo ^ 0x8000)
- 0x8000;
/* Maybe ignore the LSB
of LO, which is
actually part of the
instruction. */
if (r2_type != R_V850_LO16)
lo &= ~1;
sym_addr =
(hi << 16)
+ lo;
}
} else
goto bad_resolved_reloc;
break;
case R_V850_LO16:
/* See if this is actually the
2nd half of a pair. */
if (p > relpp
&& (p[-1]->howto->type
== R_V850_HI16_S)
&& (p[-1]->sym_ptr_ptr
== p[0]->sym_ptr_ptr)
&& (p[-1]->addend == p[0]->addend))
break; /* not an error */
else
goto bad_resolved_reloc;
case R_V850_HI16:
goto bad_resolved_reloc;
default:
goto good_32bit_resolved_reloc;
#elif defined(TARGET_microblaze)
case R_MICROBLAZE_64:
sym_addr =
(r_mem[2] << 24)
+ (r_mem[3] << 16)
+ (r_mem[6] << 8)
+ r_mem[7];
relocation_needed = 1;
update_text = 0;
pflags = 0x80000000;
break;
case R_MICROBLAZE_GOTPC_64:
/* This is data-relative. We can't support this with bflt */
goto bad_resolved_reloc;
case R_MICROBLAZE_GOT_64:
/* This is a GOT relocation. But it is accessed via the GOT register (r20)
* so doesn't need relocation
*/
relocation_needed = 0;
break;
case R_MICROBLAZE_32:
goto good_32bit_resolved_reloc;
/* These are already relocated for us as text-relative, or are dummy entries */
case R_MICROBLAZE_64_PCREL:
case R_MICROBLAZE_PLT_64:
case R_MICROBLAZE_NONE:
case R_MICROBLAZE_64_NONE:
case R_MICROBLAZE_32_PCREL_LO:
relocation_needed = 0;
continue;
default:
goto bad_resolved_reloc;
#elif defined(TARGET_arm)
case R_ARM_TARGET1:
case R_ARM_TARGET2:
case R_ARM_ABS32:
relocation_needed = 1;
break;
case R_ARM_REL32:
case R_ARM_JUMP24:
case R_ARM_CALL:
case R_ARM_THM_PC11:
case R_ARM_THM_PC22:
case R_ARM_THM_JUMP24:
case R_ARM_PC24:
case R_ARM_PLT32:
case R_ARM_GOTPC:
case R_ARM_GOT32:
case R_ARM_PREL31:
case R_ARM_V4BX:
case R_ARM_NONE:
relocation_needed = 0;
break;
default:
goto bad_resolved_reloc;
#elif defined(TARGET_m68k)
case R_68K_32:
goto good_32bit_resolved_reloc;
case R_68K_PC32:
case R_68K_PC16:
/* The linker has already resolved
PC relocs for us. In PIC links,
the symbol must be in the data
segment. */
case R_68K_NONE:
continue;
default:
goto bad_resolved_reloc;
#elif defined TARGET_bfin
case R_BFIN_RIMM16:
case R_BFIN_LUIMM16:
case R_BFIN_HUIMM16:
sym_vma = elf2flt_bfd_section_vma(sym_section);
sym_addr += sym_vma + q->addend;
if (weak_und_symbol(sym_section->name, (*(q->sym_ptr_ptr))))
continue;
if (q->howto->type == R_BFIN_RIMM16 && (0xFFFF0000 & sym_addr)) {
fprintf (stderr, "Relocation overflow for rN = %s\n",sym_name);
bad_relocs++;
}
if ((0xFFFF0000 & sym_addr) != persistent_data) {
flat_relocs = (uint32_t *)
(realloc (flat_relocs, (flat_reloc_count + 1) * sizeof (uint32_t)));
if (verbose)
printf("New persistent data for %08"PRIx32"\n", sym_addr);
persistent_data = 0xFFFF0000 & sym_addr;
flat_relocs[flat_reloc_count++]
= (sym_addr >> 16) | (3 << 26);
}
flat_relocs = (uint32_t *)
(realloc (flat_relocs, (flat_reloc_count + 1) * sizeof (uint32_t)));
if (bfin_set_reloc (flat_relocs + flat_reloc_count,
sym_section->name, sym_name,
(*(q->sym_ptr_ptr)),
q->howto->type == R_BFIN_HUIMM16 ? 1 : 0,
section_vma + q->address))
bad_relocs++;
if (a->flags & SEC_CODE)
text_has_relocs = 1;
flat_reloc_count++;
break;
case R_BFIN_BYTE4_DATA:
sym_vma = elf2flt_bfd_section_vma(sym_section);
sym_addr += sym_vma + q->addend;
if (weak_und_symbol (sym_section->name, (*(q->sym_ptr_ptr))))
continue;
flat_relocs = (uint32_t *)
(realloc (flat_relocs, (flat_reloc_count + 1) * sizeof (uint32_t)));
if (bfin_set_reloc (flat_relocs + flat_reloc_count,
sym_section->name, sym_name,
(*(q->sym_ptr_ptr)),
2, section_vma + q->address))
bad_relocs++;
if (a->flags & SEC_CODE)
text_has_relocs = 1;
flat_reloc_count++;
break;
#elif defined (TARGET_h8300)
case R_H8_DIR32:
case R_H8_DIR32A16:
case R_H8_DISP32A16:
r_mem[0] = 0;
case R_H8_DIR24A8:
case R_H8_DIR24R8:
goto good_32bit_resolved_reloc;
case R_H8_PCREL8:
case R_H8_PCREL16:
continue;
#elif defined(TARGET_xtensa)
case R_XTENSA_NONE:
case R_XTENSA_OP0:
case R_XTENSA_OP1:
case R_XTENSA_OP2:
case R_XTENSA_SLOT0_OP:
case R_XTENSA_SLOT1_OP:
case R_XTENSA_SLOT2_OP:
case R_XTENSA_SLOT3_OP:
case R_XTENSA_SLOT4_OP:
case R_XTENSA_SLOT5_OP:
case R_XTENSA_SLOT6_OP:
case R_XTENSA_SLOT7_OP:
case R_XTENSA_SLOT8_OP:
case R_XTENSA_SLOT9_OP:
case R_XTENSA_SLOT10_OP:
case R_XTENSA_SLOT11_OP:
case R_XTENSA_SLOT12_OP:
case R_XTENSA_SLOT13_OP:
case R_XTENSA_SLOT14_OP:
case R_XTENSA_SLOT0_ALT:
case R_XTENSA_SLOT1_ALT:
case R_XTENSA_SLOT2_ALT:
case R_XTENSA_SLOT3_ALT:
case R_XTENSA_SLOT4_ALT:
case R_XTENSA_SLOT5_ALT:
case R_XTENSA_SLOT6_ALT:
case R_XTENSA_SLOT7_ALT:
case R_XTENSA_SLOT8_ALT:
case R_XTENSA_SLOT9_ALT:
case R_XTENSA_SLOT10_ALT:
case R_XTENSA_SLOT11_ALT:
case R_XTENSA_SLOT12_ALT:
case R_XTENSA_SLOT13_ALT:
case R_XTENSA_SLOT14_ALT:
case R_XTENSA_ASM_EXPAND:
case R_XTENSA_ASM_SIMPLIFY:
case R_XTENSA_DIFF8:
case R_XTENSA_DIFF16:
case R_XTENSA_DIFF32:
#if HAVE_BFD_XTENSA_PDIFF_RELOCS
case R_XTENSA_PDIFF8:
case R_XTENSA_PDIFF16:
case R_XTENSA_PDIFF32:
case R_XTENSA_NDIFF8:
case R_XTENSA_NDIFF16:
case R_XTENSA_NDIFF32:
#endif
case R_XTENSA_32_PCREL:
continue;
case R_XTENSA_32:
case R_XTENSA_PLT:
goto good_32bit_resolved_reloc_update_text;
default:
goto bad_resolved_reloc;
#elif defined(TARGET_riscv64) || defined(TARGET_riscv32)
case R_RISCV_NONE:
case R_RISCV_32_PCREL:
case R_RISCV_ADD8:
case R_RISCV_ADD16:
case R_RISCV_ADD32:
case R_RISCV_ADD64:
case R_RISCV_SUB6:
case R_RISCV_SUB8:
case R_RISCV_SUB16:
case R_RISCV_SUB32:
case R_RISCV_SUB64:
case R_RISCV_SET6:
case R_RISCV_SET8:
case R_RISCV_SET16:
case R_RISCV_SET32:
case R_RISCV_SET_ULEB128:
case R_RISCV_SUB_ULEB128:
continue;
case R_RISCV_32:
case R_RISCV_64:
goto good_32bit_resolved_reloc;
default:
goto bad_resolved_reloc;
#else
default:
/* The default is to assume that the
relocation is relative and has
already been fixed up by the
linker (perhaps we ought to make
give an error by default, and
require `safe' relocations to be
enumberated explicitly?). */
goto good_32bit_resolved_reloc;
#endif
good_32bit_resolved_reloc:
update_text = 0;
good_32bit_resolved_reloc_update_text:
if (bfd_big_endian (abs_bfd))
sym_addr =
(r_mem[0] << 24)
+ (r_mem[1] << 16)
+ (r_mem[2] << 8)
+ r_mem[3];
else
sym_addr =
r_mem[0]
+ (r_mem[1] << 8)
+ (r_mem[2] << 16)
+ (r_mem[3] << 24);
relocation_needed = 1;
break;
bad_resolved_reloc:
printf("ERROR: reloc type %s unsupported in this context\n",
q->howto->name);
bad_relocs++;
break;
}
} else {
/* Calculate the sym address ourselves. */
#if defined(TARGET_xtensa)
/* For xtensa, calculation of addresses won't
work this way. binutils "ld -r" generate
different relocation types, among others
type 20, R_XTENSA_SLOT0_OP. The latter is
produced for various opcodes that differ
in size and format, some will have the
addend filled in when linking, others won't.
For elf2flt to handle these relocations
would involve analysing the opcodes in
detail. Therefore, elf2flt for xtensa is
patched to work with "-a" option solely,
which will take output of "ld -q".
*/
fatal("ERROR: cannot run without '-a'");
#endif
sym_reloc_size = bfd_get_reloc_size(q->howto);
if (sym_reloc_size == 0) {
/* These are dummy relocs that can be ignored */
continue;
}
#if !defined(TARGET_h8300) && !defined(TARGET_e1) && !defined(TARGET_bfin) && !defined(TARGET_m68k)
if (sym_reloc_size != 4) {
printf("ERROR: bad reloc type %d size=%d for symbol=%s\n",
(*p)->howto->type, sym_reloc_size, sym_name);
bad_relocs++;
rc = -1;
continue;
}
#endif
switch ((*p)->howto->type) {
#if defined(TARGET_m68k)
case R_68K_32:
relocation_needed = 1;
sym_vma = elf2flt_bfd_section_vma(sym_section);
sym_addr += sym_vma + q->addend;
break;
case R_68K_PC16:
case R_68K_PC32:
sym_vma = 0;
sym_addr += sym_vma + q->addend;
sym_addr -= q->address;
break;
#endif
#if defined(TARGET_arm)
case R_ARM_ABS32:
relocation_needed = 1;
if (verbose)
fprintf(stderr,
"%s vma=0x%x, "
"value=0x%"PRIx64", "
"address=0x%"PRIx64" "
"sym_addr=0x%x rs=0x%x, opcode=0x%x\n",
"ABS32",
sym_vma,
(uint64_t) (*(q->sym_ptr_ptr))->value,
(uint64_t) q->address, sym_addr,
(*p)->howto->rightshift,
*(uint32_t *)r_mem);
sym_vma = elf2flt_bfd_section_vma(sym_section);
sym_addr += sym_vma + q->addend;
break;
case R_ARM_GOT32:
case R_ARM_GOTPC:
/* Should be fine as is */
break;
case R_ARM_PLT32:
if (verbose)
fprintf(stderr,
"%s vma=0x%x, "
"value=0x%"PRIx64", "
"address=0x%"PRIx64" "
"sym_addr=0x%x rs=0x%x, opcode=0x%x\n",
"PLT32",
sym_vma,
(uint64_t) (*(q->sym_ptr_ptr))->value,
(uint64_t) q->address, sym_addr,
(*p)->howto->rightshift,
*(uint32_t *)r_mem);
case R_ARM_PC24:
sym_vma = 0;
sym_addr = (sym_addr-q->address)>>(*p)->howto->rightshift;
break;
#endif
#ifdef TARGET_v850
case R_V850_ABS32:
relocation_needed = 1;
sym_vma = elf2flt_bfd_section_vma(sym_section);
sym_addr += sym_vma + q->addend;
break;
case R_V850_ZDA_16_16_OFFSET:
case R_V850_ZDA_16_16_SPLIT_OFFSET:
/* Can't support zero-relocations. */
printf ("ERROR: %s+0x%"PRIx64": zero relocations not supported\n",
sym_name, (uint64_t) q->addend);
continue;
#endif /* TARGET_v850 */
#ifdef TARGET_h8300
case R_H8_DIR24R8:
if (sym_reloc_size != 4) {
printf("R_H8_DIR24R8 size %d\n", sym_reloc_size);
bad_relocs++;
continue;
}
relocation_needed = 1;
sym_addr = (*(q->sym_ptr_ptr))->value;