/* Renesas RX specific support for 32-bit ELF.
- Copyright (C) 2008, 2009, 2010
+ Copyright (C) 2008, 2009, 2010, 2011
Free Software Foundation, Inc.
This file is part of BFD, the Binary File Descriptor library.
#include "sysdep.h"
#include "bfd.h"
+#include "bfd_stdint.h"
#include "libbfd.h"
#include "elf-bfd.h"
#include "elf/rx.h"
#define RX_OPCODE_BIG_ENDIAN 0
+/* This is a meta-target that's used only with objcopy, to avoid the
+ endian-swap we would otherwise get. We check for this in
+ rx_elf_object_p(). */
+const bfd_target bfd_elf32_rx_be_ns_vec;
+const bfd_target bfd_elf32_rx_be_vec;
+
#ifdef DEBUG
char * rx_get_reloc (long);
void rx_dump_symtab (bfd *, void *, void *);
{ BFD_RELOC_RX_RELAX, R_RX_RH_RELAX },
{ BFD_RELOC_RX_SYM, R_RX_SYM },
{ BFD_RELOC_RX_OP_SUBTRACT, R_RX_OPsub },
+ { BFD_RELOC_RX_OP_NEG, R_RX_OPneg },
{ BFD_RELOC_RX_ABS8, R_RX_ABS8 },
{ BFD_RELOC_RX_ABS16, R_RX_ABS16 },
+ { BFD_RELOC_RX_ABS16_REV, R_RX_ABS16_REV },
{ BFD_RELOC_RX_ABS32, R_RX_ABS32 },
+ { BFD_RELOC_RX_ABS32_REV, R_RX_ABS32_REV },
{ BFD_RELOC_RX_ABS16UL, R_RX_ABS16UL },
{ BFD_RELOC_RX_ABS16UW, R_RX_ABS16UW },
{ BFD_RELOC_RX_ABS16U, R_RX_ABS16U }
struct elf_link_hash_entry ** sym_hashes;
Elf_Internal_Rela * rel;
Elf_Internal_Rela * relend;
+ bfd_boolean pid_mode;
+ bfd_boolean saw_subtract = FALSE;
+
+ if (elf_elfheader (output_bfd)->e_flags & E_FLAG_RX_PID)
+ pid_mode = TRUE;
+ else
+ pid_mode = FALSE;
symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
sym_hashes = elf_sym_hashes (input_bfd);
sec = NULL;
relocation = 0;
+ if (rx_stack_top == 0)
+ saw_subtract = FALSE;
+
if (r_symndx < symtab_hdr->sh_info)
{
sym = local_syms + r_symndx;
}
if (sec != NULL && elf_discarded_section (sec))
- {
- /* For relocs against symbols from removed linkonce sections,
- or sections discarded by a linker script, we just want the
- section contents zeroed. Avoid any special processing. */
- _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
- rel->r_info = 0;
- rel->r_addend = 0;
- continue;
- }
+ RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
+ rel, relend, howto, contents);
if (info->relocatable)
{
_bfd_error_handler (_("%B:%A: Warning: deprecated Red Hat reloc " type " detected against: %s."), \
input_bfd, input_section, name)
+ /* Check for unsafe relocs in PID mode. These are any relocs where
+ an absolute address is being computed. There are special cases
+ for relocs against symbols that are known to be referenced in
+ crt0.o before the PID base address register has been initialised. */
+#define UNSAFE_FOR_PID \
+ do \
+ { \
+ if (pid_mode \
+ && sec != NULL \
+ && sec->flags & SEC_READONLY \
+ && !(input_section->flags & SEC_DEBUGGING) \
+ && strcmp (name, "__pid_base") != 0 \
+ && strcmp (name, "__gp") != 0 \
+ && strcmp (name, "__romdatastart") != 0 \
+ && !saw_subtract) \
+ _bfd_error_handler (_("%B(%A): unsafe PID relocation %s at 0x%08lx (against %s in %s)"), \
+ input_bfd, input_section, howto->name, \
+ input_section->output_section->vma + input_section->output_offset + rel->r_offset, \
+ name, sec->name); \
+ } \
+ while (0)
+
/* Opcode relocs are always big endian. Data relocs are bi-endian. */
switch (r_type)
{
WARN_REDHAT ("RX_RH_8_NEG");
relocation = - relocation;
case R_RX_DIR8S_PCREL:
+ UNSAFE_FOR_PID;
RANGE (-128, 127);
OP (0) = relocation;
break;
case R_RX_DIR8S:
+ UNSAFE_FOR_PID;
RANGE (-128, 255);
OP (0) = relocation;
break;
case R_RX_DIR8U:
+ UNSAFE_FOR_PID;
RANGE (0, 255);
OP (0) = relocation;
break;
WARN_REDHAT ("RX_RH_16_NEG");
relocation = - relocation;
case R_RX_DIR16S_PCREL:
+ UNSAFE_FOR_PID;
RANGE (-32768, 32767);
#if RX_OPCODE_BIG_ENDIAN
#else
case R_RX_RH_16_OP:
WARN_REDHAT ("RX_RH_16_OP");
+ UNSAFE_FOR_PID;
RANGE (-32768, 32767);
#if RX_OPCODE_BIG_ENDIAN
OP (1) = relocation;
break;
case R_RX_DIR16S:
+ UNSAFE_FOR_PID;
RANGE (-32768, 65535);
if (BIGE (output_bfd) && !(input_section->flags & SEC_CODE))
{
break;
case R_RX_DIR16U:
+ UNSAFE_FOR_PID;
RANGE (0, 65536);
#if RX_OPCODE_BIG_ENDIAN
OP (1) = relocation;
break;
case R_RX_DIR16:
+ UNSAFE_FOR_PID;
RANGE (-32768, 65536);
#if RX_OPCODE_BIG_ENDIAN
OP (1) = relocation;
break;
case R_RX_DIR16_REV:
+ UNSAFE_FOR_PID;
RANGE (-32768, 65536);
#if RX_OPCODE_BIG_ENDIAN
OP (0) = relocation;
break;
case R_RX_RH_24_NEG:
+ UNSAFE_FOR_PID;
WARN_REDHAT ("RX_RH_24_NEG");
relocation = - relocation;
case R_RX_DIR24S_PCREL:
break;
case R_RX_RH_24_OP:
+ UNSAFE_FOR_PID;
WARN_REDHAT ("RX_RH_24_OP");
RANGE (-0x800000, 0x7fffff);
#if RX_OPCODE_BIG_ENDIAN
break;
case R_RX_DIR24S:
+ UNSAFE_FOR_PID;
RANGE (-0x800000, 0x7fffff);
if (BIGE (output_bfd) && !(input_section->flags & SEC_CODE))
{
break;
case R_RX_RH_24_UNS:
+ UNSAFE_FOR_PID;
WARN_REDHAT ("RX_RH_24_UNS");
RANGE (0, 0xffffff);
#if RX_OPCODE_BIG_ENDIAN
break;
case R_RX_RH_32_NEG:
+ UNSAFE_FOR_PID;
WARN_REDHAT ("RX_RH_32_NEG");
relocation = - relocation;
#if RX_OPCODE_BIG_ENDIAN
break;
case R_RX_RH_32_OP:
+ UNSAFE_FOR_PID;
WARN_REDHAT ("RX_RH_32_OP");
#if RX_OPCODE_BIG_ENDIAN
OP (3) = relocation;
/* Complex reloc handling: */
case R_RX_ABS32:
+ UNSAFE_FOR_PID;
RX_STACK_POP (relocation);
#if RX_OPCODE_BIG_ENDIAN
OP (3) = relocation;
break;
case R_RX_ABS32_REV:
+ UNSAFE_FOR_PID;
RX_STACK_POP (relocation);
#if RX_OPCODE_BIG_ENDIAN
OP (0) = relocation;
case R_RX_ABS24S_PCREL:
case R_RX_ABS24S:
+ UNSAFE_FOR_PID;
RX_STACK_POP (relocation);
RANGE (-0x800000, 0x7fffff);
if (BIGE (output_bfd) && !(input_section->flags & SEC_CODE))
break;
case R_RX_ABS16:
+ UNSAFE_FOR_PID;
RX_STACK_POP (relocation);
RANGE (-32768, 65535);
#if RX_OPCODE_BIG_ENDIAN
break;
case R_RX_ABS16_REV:
+ UNSAFE_FOR_PID;
RX_STACK_POP (relocation);
RANGE (-32768, 65535);
#if RX_OPCODE_BIG_ENDIAN
break;
case R_RX_ABS16U:
+ UNSAFE_FOR_PID;
RX_STACK_POP (relocation);
RANGE (0, 65536);
#if RX_OPCODE_BIG_ENDIAN
break;
case R_RX_ABS16UL:
+ UNSAFE_FOR_PID;
RX_STACK_POP (relocation);
relocation >>= 2;
RANGE (0, 65536);
break;
case R_RX_ABS16UW:
+ UNSAFE_FOR_PID;
RX_STACK_POP (relocation);
relocation >>= 1;
RANGE (0, 65536);
break;
case R_RX_ABS8:
+ UNSAFE_FOR_PID;
RX_STACK_POP (relocation);
RANGE (-128, 255);
OP (0) = relocation;
break;
case R_RX_ABS8U:
+ UNSAFE_FOR_PID;
RX_STACK_POP (relocation);
RANGE (0, 255);
OP (0) = relocation;
break;
case R_RX_ABS8UL:
+ UNSAFE_FOR_PID;
RX_STACK_POP (relocation);
relocation >>= 2;
RANGE (0, 255);
break;
case R_RX_ABS8UW:
+ UNSAFE_FOR_PID;
RX_STACK_POP (relocation);
relocation >>= 1;
RANGE (0, 255);
OP (0) = relocation;
break;
- case R_RX_ABS8S_PCREL:
case R_RX_ABS8S:
+ UNSAFE_FOR_PID;
+ case R_RX_ABS8S_PCREL:
RX_STACK_POP (relocation);
RANGE (-128, 127);
OP (0) = relocation;
if (r_symndx < symtab_hdr->sh_info)
RX_STACK_PUSH (sec->output_section->vma
+ sec->output_offset
- + sym->st_value);
+ + sym->st_value
+ + rel->r_addend);
else
{
if (h != NULL
|| h->root.type == bfd_link_hash_defweak))
RX_STACK_PUSH (h->root.u.def.value
+ sec->output_section->vma
- + sec->output_offset);
+ + sec->output_offset
+ + rel->r_addend);
else
_bfd_error_handler (_("Warning: RX_SYM reloc with an unknown symbol"));
}
{
int32_t tmp1, tmp2;
+ saw_subtract = TRUE;
RX_STACK_POP (tmp1);
RX_STACK_POP (tmp2);
tmp2 -= tmp1;
{
int32_t tmp1, tmp2;
+ saw_subtract = TRUE;
RX_STACK_POP (tmp1);
RX_STACK_POP (tmp2);
tmp1 /= tmp2;
}
static bfd_boolean no_warn_mismatch = FALSE;
+static bfd_boolean ignore_lma = TRUE;
-void bfd_elf32_rx_set_target_flags (bfd_boolean);
+void bfd_elf32_rx_set_target_flags (bfd_boolean, bfd_boolean);
void
-bfd_elf32_rx_set_target_flags (bfd_boolean user_no_warn_mismatch)
+bfd_elf32_rx_set_target_flags (bfd_boolean user_no_warn_mismatch,
+ bfd_boolean user_ignore_lma)
{
no_warn_mismatch = user_no_warn_mismatch;
+ ignore_lma = user_ignore_lma;
}
/* Merge backend specific data from an object file to the output
}
else if (old_flags != new_flags)
{
- flagword known_flags = E_FLAG_RX_64BIT_DOUBLES | E_FLAG_RX_DSP;
+ flagword known_flags = E_FLAG_RX_64BIT_DOUBLES | E_FLAG_RX_DSP | E_FLAG_RX_PID;
if ((old_flags ^ new_flags) & known_flags)
{
static bfd_boolean
rx_elf_object_p (bfd * abfd)
{
+ int i;
+ unsigned int u;
+ Elf_Internal_Phdr *phdr = elf_tdata (abfd)->phdr;
+ int nphdrs = elf_elfheader (abfd)->e_phnum;
+ sec_ptr bsec;
+ static int saw_be = FALSE;
+
+ /* We never want to automatically choose the non-swapping big-endian
+ target. The user can only get that explicitly, such as with -I
+ and objcopy. */
+ if (abfd->xvec == &bfd_elf32_rx_be_ns_vec
+ && abfd->target_defaulted)
+ return FALSE;
+
+ /* BFD->target_defaulted is not set to TRUE when a target is chosen
+ as a fallback, so we check for "scanning" to know when to stop
+ using the non-swapping target. */
+ if (abfd->xvec == &bfd_elf32_rx_be_ns_vec
+ && saw_be)
+ return FALSE;
+ if (abfd->xvec == &bfd_elf32_rx_be_vec)
+ saw_be = TRUE;
+
bfd_default_set_arch_mach (abfd, bfd_arch_rx,
elf32_rx_machine (abfd));
+
+ /* For each PHDR in the object, we must find some section that
+ corresponds (based on matching file offsets) and use its VMA
+ information to reconstruct the p_vaddr field we clobbered when we
+ wrote it out. */
+ for (i=0; i<nphdrs; i++)
+ {
+ for (u=0; u<elf_tdata(abfd)->num_elf_sections; u++)
+ {
+ Elf_Internal_Shdr *sec = elf_tdata(abfd)->elf_sect_ptr[u];
+
+ if (phdr[i].p_offset <= (bfd_vma) sec->sh_offset
+ && (bfd_vma)sec->sh_offset <= phdr[i].p_offset + (phdr[i].p_filesz - 1))
+ {
+ /* Found one! The difference between the two addresses,
+ plus the difference between the two file offsets, is
+ enough information to reconstruct the lma. */
+
+ /* Example where they aren't:
+ PHDR[1] = lma fffc0100 offset 00002010 size 00000100
+ SEC[6] = vma 00000050 offset 00002050 size 00000040
+
+ The correct LMA for the section is fffc0140 + (2050-2010).
+ */
+
+ phdr[i].p_vaddr = sec->sh_addr + (sec->sh_offset - phdr[i].p_offset);
+ break;
+ }
+ }
+
+ /* We must update the bfd sections as well, so we don't stop
+ with one match. */
+ bsec = abfd->sections;
+ while (bsec)
+ {
+ if (phdr[i].p_vaddr <= bsec->vma
+ && bsec->vma <= phdr[i].p_vaddr + (phdr[i].p_filesz - 1))
+ {
+ bsec->lma = phdr[i].p_paddr + (bsec->vma - phdr[i].p_vaddr);
+ }
+ bsec = bsec->next;
+ }
+ }
+
return TRUE;
}
\f
#endif
if (o->flags & SEC_CODE
&& bfd_big_endian (abfd)
- && (o->size % 4 || o->rawsize % 4))
+ && o->size % 4)
{
#ifdef DJDEBUG
fprintf (stderr, "adjusting...\n");
#endif
o->size += 4 - (o->size % 4);
- o->rawsize += 4 - (o->rawsize % 4);
}
}
phdr = tdata->phdr;
count = tdata->program_header_size / bed->s->sizeof_phdr;
- for (i = count; i-- != 0; )
- if (phdr[i].p_type == PT_LOAD)
- {
- /* The Renesas tools expect p_paddr to be zero. However,
- there is no other way to store the writable data in ROM for
- startup initialization. So, we let the linker *think*
- we're using paddr and vaddr the "usual" way, but at the
- last minute we move the paddr into the vaddr (which is what
- the simulator uses) and zero out paddr. Note that this
- does not affect the section headers, just the program
- headers. We hope. */
+ if (ignore_lma)
+ for (i = count; i-- != 0;)
+ if (phdr[i].p_type == PT_LOAD)
+ {
+ /* The Renesas tools expect p_paddr to be zero. However,
+ there is no other way to store the writable data in ROM for
+ startup initialization. So, we let the linker *think*
+ we're using paddr and vaddr the "usual" way, but at the
+ last minute we move the paddr into the vaddr (which is what
+ the simulator uses) and zero out paddr. Note that this
+ does not affect the section headers, just the program
+ headers. We hope. */
phdr[i].p_vaddr = phdr[i].p_paddr;
- /* If we zero out p_paddr, then the LMA in the section table
+#if 0 /* If we zero out p_paddr, then the LMA in the section table
becomes wrong. */
- /*phdr[i].p_paddr = 0;*/
- }
+ phdr[i].p_paddr = 0;
+#endif
+ }
return TRUE;
}
#define bfd_elf32_bfd_relax_section elf32_rx_relax_section_wrapper
#include "elf32-target.h"
+
+/* We define a second big-endian target that doesn't have the custom
+ section get/set hooks, for times when we want to preserve the
+ pre-swapped .text sections (like objcopy). */
+
+#undef TARGET_BIG_SYM
+#define TARGET_BIG_SYM bfd_elf32_rx_be_ns_vec
+#undef TARGET_BIG_NAME
+#define TARGET_BIG_NAME "elf32-rx-be-ns"
+#undef TARGET_LITTLE_SYM
+
+#undef bfd_elf32_get_section_contents
+#undef bfd_elf32_set_section_contents
+
+#undef elf32_bed
+#define elf32_bed elf32_rx_be_ns_bed
+
+#include "elf32-target.h"
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