#include "elf32-hppa.h"
#define ARCH_SIZE 32
#include "elf-hppa.h"
+#include "elf32-hppa.h"
-/* We use three different hash tables to hold information for
- linking PA ELF objects.
+/* We use two hash tables to hold information for linking PA ELF objects.
The first is the elf32_hppa_link_hash_table which is derived
from the standard ELF linker hash table. We use this as a place to
struct elf32_hppa_stub_hash_entry
{
- /* Base hash table entry structure, we can get the name of the stub
- (and thus know exactly what actions it performs) from the base
- hash table entry. */
+ /* Base hash table entry structure. */
struct bfd_hash_entry root;
- /* Offset of the beginning of this stub. */
+ /* The stub section. */
+ asection *stub_sec;
+
+ /* Offset within stub_sec of the beginning of this stub. */
bfd_vma offset;
/* Given the symbol's value and its section we can determine its final
asection *target_section;
};
-struct elf32_hppa_stub_hash_table
-{
- /* The hash table itself. */
- struct bfd_hash_table root;
-
- /* The stub BFD. */
- bfd *stub_bfd;
-
- /* Where to place the next stub. */
- bfd_byte *location;
-
- /* Current offset in the stub section. */
- unsigned int offset;
-
-};
-
-struct elf32_hppa_link_hash_entry
-{
- struct elf_link_hash_entry root;
-};
-
struct elf32_hppa_link_hash_table
{
/* The main hash table. */
struct elf_link_hash_table root;
/* The stub hash table. */
- struct elf32_hppa_stub_hash_table *stub_hash_table;
+ struct bfd_hash_table stub_hash_table;
- /* A count of the number of output symbols. */
- unsigned int output_symbol_count;
+ /* Current offsets in the stub sections. */
+ bfd_vma *offset;
- /* Stuff so we can handle DP relative relocations. */
- long global_value;
- int global_sym_defined;
+ /* Global data pointer. */
+ bfd_vma global_value;
};
-/* ELF32/HPPA relocation support
- This file contains ELF32/HPPA relocation support as specified
- in the Stratus FTX/Golf Object File Format (SED-1762) dated
- February 1994. */
+/* For linker stub hash tables. */
-#include "elf32-hppa.h"
-#include "hppa_stubs.h"
+#define elf32_hppa_stub_hash_lookup(table, string, create, copy) \
+ ((struct elf32_hppa_stub_hash_entry *) \
+ bfd_hash_lookup ((table), (string), (create), (copy)))
-static unsigned long hppa_elf_relocate_insn
- PARAMS ((bfd *, asection *, unsigned long, unsigned long, long,
- long, unsigned long, unsigned long, unsigned long));
+/* Get the PA ELF linker hash table from a link_info structure. */
-static boolean elf32_hppa_add_symbol_hook
- PARAMS ((bfd *, struct bfd_link_info *, const Elf_Internal_Sym *,
- const char **, flagword *, asection **, bfd_vma *));
+#define elf32_hppa_hash_table(p) \
+ ((struct elf32_hppa_link_hash_table *) ((p)->hash))
-static bfd_reloc_status_type elf32_hppa_bfd_final_link_relocate
- PARAMS ((reloc_howto_type *, bfd *, bfd *, asection *,
- bfd_byte *, bfd_vma, bfd_vma, bfd_vma, struct bfd_link_info *,
- asection *, const char *, int));
+
+static struct bfd_hash_entry *elf32_hppa_stub_hash_newfunc
+ PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
static struct bfd_link_hash_table *elf32_hppa_link_hash_table_create
PARAMS ((bfd *));
-static struct bfd_hash_entry *
-elf32_hppa_stub_hash_newfunc
- PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
+static char *elf32_hppa_stub_name
+ PARAMS ((const char *, const asection *, const asection *,
+ bfd_vma, const struct elf_link_hash_entry *));
-static boolean
-elf32_hppa_relocate_section
+static int elf32_hppa_relocate_insn
+ PARAMS ((int, bfd_vma, bfd_signed_vma, unsigned int, int,
+ enum hppa_reloc_field_selector_type_alt));
+
+static bfd_reloc_status_type elf32_hppa_bfd_final_link_relocate
+ PARAMS ((reloc_howto_type *, bfd *, asection *,
+ bfd_byte *, bfd_vma, bfd_vma, bfd_signed_vma,
+ struct bfd_link_info *, asection *, const char *,
+ struct elf_link_hash_entry *));
+
+static boolean elf32_hppa_relocate_section
PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *,
bfd_byte *, Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
-static boolean
-elf32_hppa_stub_hash_table_init
- PARAMS ((struct elf32_hppa_stub_hash_table *, bfd *,
- struct bfd_hash_entry *(*) PARAMS ((struct bfd_hash_entry *,
- struct bfd_hash_table *,
- const char *))));
-
-static boolean
-elf32_hppa_build_one_stub PARAMS ((struct bfd_hash_entry *, PTR));
+static boolean elf32_hppa_add_symbol_hook
+ PARAMS ((bfd *, struct bfd_link_info *, const Elf_Internal_Sym *,
+ const char **, flagword *, asection **, bfd_vma *));
static unsigned int elf32_hppa_size_of_stub
- PARAMS ((bfd_vma, bfd_vma, const char *));
-
-static void elf32_hppa_name_of_stub
- PARAMS ((bfd_vma, bfd_vma, char *));
-
-/* For linker stub hash tables. */
-#define elf32_hppa_stub_hash_lookup(table, string, create, copy) \
- ((struct elf32_hppa_stub_hash_entry *) \
- bfd_hash_lookup (&(table)->root, (string), (create), (copy)))
+ PARAMS ((asection *, bfd_vma, bfd_vma));
-#define elf32_hppa_stub_hash_traverse(table, func, info) \
- (bfd_hash_traverse \
- (&(table)->root, \
- (boolean (*) PARAMS ((struct bfd_hash_entry *, PTR))) (func), \
- (info)))
-
-/* For HPPA linker hash table. */
-
-#define elf32_hppa_link_hash_lookup(table, string, create, copy, follow)\
- ((struct elf32_hppa_link_hash_entry *) \
- elf_link_hash_lookup (&(table)->root, (string), (create), \
- (copy), (follow)))
-
-#define elf32_hppa_link_hash_traverse(table, func, info) \
- (elf_link_hash_traverse \
- (&(table)->root, \
- (boolean (*) PARAMS ((struct elf_link_hash_entry *, PTR))) (func), \
- (info)))
-
-/* Get the PA ELF linker hash table from a link_info structure. */
-
-#define elf32_hppa_hash_table(p) \
- ((struct elf32_hppa_link_hash_table *) ((p)->hash))
+static boolean elf32_hppa_build_one_stub
+ PARAMS ((struct bfd_hash_entry *, PTR));
/* Assorted hash table functions. */
if (ret)
{
/* Initialize the local fields. */
+ ret->stub_sec = NULL;
ret->offset = 0;
ret->target_value = 0;
ret->target_section = NULL;
return (struct bfd_hash_entry *) ret;
}
-/* Initialize a stub hash table. */
-
-static boolean
-elf32_hppa_stub_hash_table_init (table, stub_bfd, newfunc)
- struct elf32_hppa_stub_hash_table *table;
- bfd *stub_bfd;
- struct bfd_hash_entry *(*newfunc) PARAMS ((struct bfd_hash_entry *,
- struct bfd_hash_table *,
- const char *));
-{
- table->offset = 0;
- table->location = 0;
- table->stub_bfd = stub_bfd;
- return (bfd_hash_table_init (&table->root, newfunc));
-}
-
/* Create the derived linker hash table. The PA ELF port uses the derived
hash table to keep information specific to the PA ELF linker (without
using static variables). */
{
struct elf32_hppa_link_hash_table *ret;
- ret = ((struct elf32_hppa_link_hash_table *)
- bfd_alloc (abfd, sizeof (struct elf32_hppa_link_hash_table)));
+ ret = ((struct elf32_hppa_link_hash_table *) bfd_alloc (abfd, sizeof (*ret)));
if (ret == NULL)
return NULL;
+
if (!_bfd_elf_link_hash_table_init (&ret->root, abfd,
_bfd_elf_link_hash_newfunc))
{
bfd_release (abfd, ret);
return NULL;
}
- ret->stub_hash_table = NULL;
- ret->output_symbol_count = 0;
+
+ /* Init the stub hash table too. */
+ if (!bfd_hash_table_init (&ret->stub_hash_table,
+ elf32_hppa_stub_hash_newfunc))
+ return NULL;
+
+ ret->offset = NULL;
ret->global_value = 0;
- ret->global_sym_defined = 0;
return &ret->root.root;
}
-/* Relocate the given INSN given the various input parameters.
+/* Build a name for a long branch stub. */
+static char *
+elf32_hppa_stub_name (sym_name, sym_sec, input_section, addend, hash)
+ const char *sym_name;
+ const asection *sym_sec;
+ const asection *input_section;
+ bfd_vma addend;
+ const struct elf_link_hash_entry *hash;
+{
+ char *stub_name;
+ int len;
+
+ len = strlen (sym_name) + 19;
+ if (hash == NULL)
+ len += 9;
- FIXME: endianness and sizeof (long) issues abound here. */
+ stub_name = bfd_malloc (len);
+ if (stub_name != NULL)
+ {
+ sprintf (stub_name, "%08x_%08x_%s",
+ input_section->id & 0xffffffff,
+ (int) addend & 0xffffffff,
+ sym_name);
+
+ /* Tack on an ID so we can uniquely identify
+ this local symbol in the stub hash tables. */
+ if (hash == NULL)
+ sprintf (stub_name + len - 10, "_%08x",
+ sym_sec->id & 0xffffffff);
+ }
+ return stub_name;
+}
-static unsigned long
-hppa_elf_relocate_insn (abfd, input_sect, insn, address, sym_value,
- r_addend, r_format, r_field, pcrel)
- bfd *abfd;
- asection *input_sect;
- unsigned long insn;
- unsigned long address;
- long sym_value;
- long r_addend;
- unsigned long r_format;
- unsigned long r_field;
- unsigned long pcrel;
+/* Relocate the given INSN given the various input parameters. */
+
+static int
+elf32_hppa_relocate_insn (insn, sym_value, r_addend, r_type, r_format, r_field)
+ int insn;
+ bfd_vma sym_value;
+ bfd_signed_vma r_addend;
+ unsigned int r_type;
+ int r_format;
+ enum hppa_reloc_field_selector_type_alt r_field;
{
- unsigned char opcode = get_opcode (insn);
- long constant_value;
+ int value;
+#ifdef ELF_ARG_RELOC
+#ifndef ELF_ARG_RELOC_INSN
+ /* Ick. Who would want to support this? */
+ int imm;
+
+ switch (r_type)
+ {
+ /* The offset is partly stored in the instruction for cases
+ where the top ten bits of the addend are used for arg_reloc.
+ This is a little tricky, because the immediate value in the
+ instruction not only needs to be pieced together from
+ multiple bit fields, but also needs to be shifted left to
+ restore the original quantity. Which bits of the offset
+ we can retrieve from the instruction depend on exactly which
+ instruction we are dealing with. */
+ case R_PARISC_PCREL17R:
+ case R_PARISC_PCREL17F:
+ case R_PARISC_PCREL17C:
+ case R_PARISC_DIR17R:
+ case R_PARISC_DIR17F:
+ /* For these relocs, we choose to use the low 10 bits from the
+ instruction and store the high 22 bits in the reloc addend.
+ It doesn't matter that the bottom 2 bits of the value are
+ always zero, as branches must be to a location which is a
+ multiple of 4. */
+#if 0
+ /* It isn't necessary to retrieve the whole immediate, but
+ this documents what we have in the instruction. */
+ imm = (((insn & 0x1f0000) >> 5)
+ | ((insn & 0x0004) << 8)
+ | ((insn & 0x1ff8) >> 3)) - ((insn & 1) << 17);
+ imm <<= 2;
+ imm = imm & 0x3ff;
+#else
+ imm = (insn & 0x7f8) >> 1;
+#endif
+ r_addend = (r_addend << (BFD_ARCH_SIZE-22)) >> (BFD_ARCH_SIZE-32);
+ r_addend = r_addend | imm;
+ break;
+
+ case R_PARISC_PCREL21L:
+ case R_PARISC_DIR21L:
+ /* In this case, the instruction stores the high 21 bits of the
+ value, so we pick off the top 10 bits, and use the reloc
+ addend to store the low 22 bits. */
+#if 0
+ /* It isn't necessary to retrieve the whole immediate, but
+ this documents what we have in the instruction. */
+ imm = (( (insn & 0x000ffe) << 8)
+ | ((insn & 0x00c000) >> 7)
+ | ((insn & 0x1f0000) >> 14)
+ | ((insn & 0x003000) >> 12)) - ((insn & 1) << 20);
+ imm <<= 11;
+ imm = imm & ~ 0x3fffff;
+#else
+ /* Just pick off the 10 needed bits, ensuring we sign extend. */
+ imm = ((insn & 0x000ff8) << 19) - ((insn & 1) << 31);
+#endif
+ r_addend = imm | (r_addend & 0x3fffff);
+ break;
+
+ default:
+ break;
+ }
+#endif
+#endif
+
+ switch (r_type)
+ {
+ case R_PARISC_PCREL21L:
+ case R_PARISC_PCREL17C:
+ case R_PARISC_PCREL17F:
+ case R_PARISC_PCREL17R:
+ case R_PARISC_PCREL14R:
+ /* Adjust PC relative offset. */
+ r_addend -= 8;
+ break;
+ default:
+ break;
+ }
+ value = hppa_field_adjust (sym_value, r_addend, r_field);
- switch (opcode)
+ switch (r_type)
{
- case LDO:
- case LDB:
- case LDH:
- case LDW:
- case LDWM:
- case STB:
- case STH:
- case STW:
- case STWM:
- case COMICLR:
- case SUBI:
- case ADDIT:
- case ADDI:
- case LDIL:
- case ADDIL:
- constant_value = HPPA_R_CONSTANT (r_addend);
-
- if (pcrel)
- sym_value -= address;
-
- sym_value = hppa_field_adjust (sym_value, constant_value, r_field);
- return hppa_rebuild_insn (abfd, insn, sym_value, r_format);
-
- case BL:
- case BE:
- case BLE:
- /* XXX r_addend ignored ???. */
- constant_value = assemble_17 ((insn & 0x001f0000) >> 16,
- (insn & 0x00001ffc) >> 2,
- insn & 1);
-
- constant_value = (constant_value << (BFD_ARCH_SIZE-17))
- >> (BFD_ARCH_SIZE-17);
- if (pcrel)
+ case R_PARISC_PCREL17C:
+ case R_PARISC_PCREL17F:
+ case R_PARISC_PCREL17R:
+ case R_PARISC_DIR17F:
+ case R_PARISC_DIR17R:
+ /* This is a branch. Divide the offset by four.
+ Note that we need to decide whether it's a branch or
+ otherwise by inspecting the reloc. Inspecting insn won't
+ work as insn might be from a .word directive. */
+ value >>= 2;
+ break;
+
+ default:
+ break;
+ }
+
+ return hppa_rebuild_insn (insn, value, r_format);
+}
+
+/* Actually perform a relocation as part of a final link. This can get
+ rather hairy when linker stubs are needed. */
+
+static bfd_reloc_status_type
+elf32_hppa_bfd_final_link_relocate (howto, input_bfd, input_section,
+ contents, offset, value, addend,
+ info, sym_sec, sym_name, h)
+ reloc_howto_type *howto;
+ bfd *input_bfd;
+ asection *input_section;
+ bfd_byte *contents;
+ bfd_vma offset;
+ bfd_vma value;
+ bfd_signed_vma addend;
+ struct bfd_link_info *info;
+ asection *sym_sec;
+ const char *sym_name;
+ struct elf_link_hash_entry *h;
+{
+ int insn;
+ unsigned int r_type = howto->type;
+ int r_format = howto->bitsize;
+ enum hppa_reloc_field_selector_type_alt r_field = e_fsel;
+ bfd_byte *hit_data = contents + offset;
+ bfd_vma location;
+
+ if (r_type == R_PARISC_NONE)
+ return bfd_reloc_ok;
+
+ insn = bfd_get_32 (input_bfd, hit_data);
+
+ /* Find out where we are and where we're going. */
+ location = (offset +
+ input_section->output_offset +
+ input_section->output_section->vma);
+
+ switch (r_type)
+ {
+ case R_PARISC_PCREL21L:
+ case R_PARISC_PCREL17C:
+ case R_PARISC_PCREL17F:
+ case R_PARISC_PCREL17R:
+ case R_PARISC_PCREL14R:
+ /* Make it a pc relative offset. */
+ value -= location;
+ break;
+ default:
+ break;
+ }
+
+ switch (r_type)
+ {
+ case R_PARISC_DIR32:
+ case R_PARISC_DIR17F:
+ case R_PARISC_PCREL17C:
+ r_field = e_fsel;
+ break;
+
+ case R_PARISC_DIR21L:
+ case R_PARISC_PCREL21L:
+ r_field = e_lrsel;
+ break;
+
+ case R_PARISC_DIR17R:
+ case R_PARISC_PCREL17R:
+ case R_PARISC_DIR14R:
+ case R_PARISC_PCREL14R:
+ r_field = e_rrsel;
+ break;
+
+ /* For all the DP relative relocations, we need to examine the symbol's
+ section. If it's a code section, then "data pointer relative" makes
+ no sense. In that case we don't adjust the "value", and for 21 bit
+ addil instructions, we change the source addend register from %dp to
+ %r0. */
+ case R_PARISC_DPREL21L:
+ r_field = e_lrsel;
+ if (sym_sec != NULL)
{
- sym_value -= (address + input_sect->output_offset
- + input_sect->output_section->vma);
- sym_value = hppa_field_adjust (sym_value, -8, r_field);
+ if ((sym_sec->flags & SEC_CODE) != 0)
+ {
+ if ((insn & ((0x3f << 26) | (0x1f << 21)))
+ == (((int) OP_ADDIL << 26) | (27 << 21)))
+ {
+ insn &= ~ (0x1f << 21);
+ }
+ }
+ else
+ value -= elf32_hppa_hash_table (info)->global_value;
}
- else
- sym_value = hppa_field_adjust (sym_value, constant_value, r_field);
+ break;
+
+ case R_PARISC_DPREL14R:
+ r_field = e_rrsel;
+ if (sym_sec != NULL && (sym_sec->flags & SEC_CODE) == 0)
+ value -= elf32_hppa_hash_table (info)->global_value;
+ break;
- return hppa_rebuild_insn (abfd, insn, sym_value >> 2, r_format);
+ case R_PARISC_DPREL14F:
+ r_field = e_fsel;
+ if (sym_sec != NULL && (sym_sec->flags & SEC_CODE) == 0)
+ value -= elf32_hppa_hash_table (info)->global_value;
+ break;
- default:
- if (opcode == 0)
+ case R_PARISC_PLABEL32:
+ r_field = e_fsel;
+ break;
+
+ case R_PARISC_PLABEL21L:
+ r_field = e_lrsel;
+ break;
+
+ case R_PARISC_PLABEL14R:
+ r_field = e_rrsel;
+ break;
+
+ /* This case is separate as it may involve a lot more work
+ to deal with linker stubs. */
+ case R_PARISC_PCREL17F:
+ r_field = e_fsel;
+
+ /* bfd_link_hash_undefweak symbols have sym_sec == NULL. */
+ if (sym_sec == NULL)
+ break;
+
+ /* Any kind of linker stub needed? */
+ /* bfd_vma value is unsigned, so this is testing for offsets
+ outside the range -0x40000 to +0x3ffff */
+ if (value + addend - 8 + 0x40000 >= 0x80000)
{
- constant_value = HPPA_R_CONSTANT (r_addend);
+ struct bfd_hash_table *stub_hash_table;
+ struct elf32_hppa_stub_hash_entry *stub_entry;
+ char *stub_name;
+
+ stub_name = elf32_hppa_stub_name (sym_name, sym_sec,
+ input_section, addend, h);
+ if (!stub_name)
+ {
+ (*_bfd_error_handler) ("%s: %s",
+ bfd_get_filename (input_bfd),
+ bfd_errmsg (bfd_get_error ()));
+ return bfd_reloc_notsupported;
+ }
+
+ stub_hash_table = &elf32_hppa_hash_table (info)->stub_hash_table;
- if (pcrel)
- sym_value -= address;
+ stub_entry = elf32_hppa_stub_hash_lookup (stub_hash_table,
+ stub_name,
+ false,
+ false);
+ if (stub_entry == NULL)
+ {
+ (*_bfd_error_handler)
+ (_("%s: cannot find stub entry %s"),
+ bfd_get_filename (input_bfd),
+ stub_name);
+ free (stub_name);
+ return bfd_reloc_notsupported;
+ }
+
+ /* Munge up the value and addend for elf32_hppa_relocate_insn. */
+ value = (stub_entry->offset
+ + stub_entry->stub_sec->output_offset
+ + stub_entry->stub_sec->output_section->vma
+ - location);
+ addend = 0;
+
+ if (value + addend - 8 + 0x40000 >= 0x80000)
+ {
+ (*_bfd_error_handler)
+ (_("%s: cannot reach stub %s, recompile with -ffunction-sections"),
+ bfd_get_filename (input_bfd),
+ stub_name);
+ free (stub_name);
+ return bfd_reloc_notsupported;
+ }
- return hppa_field_adjust (sym_value, constant_value, r_field);
+ free (stub_name);
}
- else
- abort ();
+ break;
+
+ /* Something we don't know how to handle. */
+ default:
+ return bfd_reloc_notsupported;
}
+
+ /* bfd_link_hash_undefweak symbols have sym_sec == NULL. */
+ if (sym_sec == NULL)
+ {
+ BFD_ASSERT (h != NULL && h->root.type == bfd_link_hash_undefweak);
+ value = 0;
+ }
+
+ insn = elf32_hppa_relocate_insn (insn, value, addend,
+ r_type, r_format, r_field);
+
+ /* Update the instruction word. */
+ bfd_put_32 (input_bfd, insn, hit_data);
+ return bfd_reloc_ok;
}
/* Relocate an HPPA ELF section. */
static boolean
elf32_hppa_relocate_section (output_bfd, info, input_bfd, input_section,
contents, relocs, local_syms, local_sections)
- bfd *output_bfd;
+ bfd *output_bfd ATTRIBUTE_UNUSED;
struct bfd_link_info *info;
bfd *input_bfd;
asection *input_section;
relend = relocs + input_section->reloc_count;
for (; rel < relend; rel++)
{
- int r_type;
+ unsigned int r_type;
reloc_howto_type *howto;
- unsigned long r_symndx;
+ unsigned int r_symndx;
struct elf_link_hash_entry *h;
Elf_Internal_Sym *sym;
asection *sym_sec;
const char *sym_name;
r_type = ELF32_R_TYPE (rel->r_info);
- if (r_type < 0 || r_type >= (int) R_PARISC_UNIMPLEMENTED)
+ if (r_type >= (unsigned int) R_PARISC_UNIMPLEMENTED)
{
bfd_set_error (bfd_error_bad_value);
return false;
}
else
{
- long indx;
+ int indx;
indx = r_symndx - symtab_hdr->sh_info;
h = elf_sym_hashes (input_bfd)[indx];
sym_name = bfd_section_name (input_bfd, sym_sec);
}
- r = elf32_hppa_bfd_final_link_relocate (howto, input_bfd, output_bfd,
+ r = elf32_hppa_bfd_final_link_relocate (howto, input_bfd,
input_section, contents,
rel->r_offset, relocation,
rel->r_addend, info, sym_sec,
- sym_name, h == NULL);
+ sym_name, h);
- if (r != bfd_reloc_ok)
+ switch (r)
{
- switch (r)
- {
- /* This can happen for DP relative relocs if $global$ is
- undefined. This is a panic situation so we don't try
- to continue. */
- case bfd_reloc_undefined:
- case bfd_reloc_notsupported:
- if (!((*info->callbacks->undefined_symbol)
- (info, "$global$", input_bfd,
- input_section, rel->r_offset, true)))
- return false;
+ case bfd_reloc_ok:
+ break;
+
+ case bfd_reloc_undefined:
+ case bfd_reloc_notsupported:
+ (*_bfd_error_handler)
+ (_("%s: cannot handle relocation %s for %s at 0x%x in %s"),
+ bfd_get_filename (input_bfd),
+ howto->name,
+ sym_name,
+ rel->r_offset,
+ input_section->name);
+ return false;
+
+ default:
+ case bfd_reloc_outofrange:
+ case bfd_reloc_overflow:
+ {
+ if (!((*info->callbacks->reloc_overflow)
+ (info, sym_name, howto->name, (bfd_vma) 0,
+ input_bfd, input_section, rel->r_offset)))
return false;
- case bfd_reloc_dangerous:
- {
- /* We use this return value to indicate that we performed
- a "dangerous" relocation. This doesn't mean we did
- the wrong thing, it just means there may be some cleanup
- that needs to be done here.
-
- In particular we had to swap the last call insn and its
- delay slot. If the delay slot insn needed a relocation,
- then we'll need to adjust the next relocation entry's
- offset to account for the fact that the insn moved.
-
- This hair wouldn't be necessary if we inserted stubs
- between procedures and used a "bl" to get to the stub. */
- if (rel != relend)
- {
- Elf_Internal_Rela *next_rel = rel + 1;
-
- if (rel->r_offset + 4 == next_rel->r_offset)
- next_rel->r_offset -= 4;
- }
- break;
- }
- default:
- case bfd_reloc_outofrange:
- case bfd_reloc_overflow:
- {
- if (!((*info->callbacks->reloc_overflow)
- (info, sym_name, howto->name, (bfd_vma) 0,
- input_bfd, input_section, rel->r_offset)))
- return false;
- }
- break;
- }
+ }
+ break;
}
}
return true;
}
-/* Actually perform a relocation as part of a final link. This can get
- rather hairy when linker stubs are needed. */
+/* Called after we have seen all the input files/sections, but before
+ final symbol resolution and section placement has been determined.
-static bfd_reloc_status_type
-elf32_hppa_bfd_final_link_relocate (howto, input_bfd, output_bfd,
- input_section, contents, offset, value,
- addend, info, sym_sec, sym_name, is_local)
- reloc_howto_type *howto;
- bfd *input_bfd;
- bfd *output_bfd ATTRIBUTE_UNUSED;
- asection *input_section;
- bfd_byte *contents;
- bfd_vma offset;
- bfd_vma value;
- bfd_vma addend;
+ We use this hook to (possibly) provide a value for __gp, then we
+ fall back to the generic ELF final link routine. */
+
+boolean
+elf32_hppa_final_link (abfd, info)
+ bfd *abfd;
struct bfd_link_info *info;
- asection *sym_sec;
- const char *sym_name;
- int is_local;
{
- unsigned long insn;
- unsigned long r_type = howto->type;
- unsigned long r_format = howto->bitsize;
- unsigned long r_field = e_fsel;
- bfd_byte *hit_data = contents + offset;
- boolean r_pcrel = howto->pc_relative;
-
- insn = bfd_get_32 (input_bfd, hit_data);
-
- /* Make sure we have a value for $global$. FIXME isn't this effectively
- just like the gp pointer on MIPS? Can we use those routines for this
- purpose? */
- if (!elf32_hppa_hash_table (info)->global_sym_defined)
+ if (!info->relocateable)
{
struct elf_link_hash_entry *h;
asection *sec;
+ bfd_vma gp_val;
- h = elf_link_hash_lookup (elf_hash_table (info), "$global$", false,
- false, false);
-
- /* If there isn't a $global$, then we're in deep trouble. */
- if (h == NULL)
- return bfd_reloc_notsupported;
-
- /* If $global$ isn't a defined symbol, then we're still in deep
- trouble. */
- if (h->root.type != bfd_link_hash_defined)
- return bfd_reloc_undefined;
-
- sec = h->root.u.def.section;
- elf32_hppa_hash_table (info)->global_value = (h->root.u.def.value
- + sec->output_section->vma
- + sec->output_offset);
- elf32_hppa_hash_table (info)->global_sym_defined = 1;
- }
-
- switch (r_type)
- {
- case R_PARISC_NONE:
- break;
-
- case R_PARISC_DIR32:
- case R_PARISC_DIR17F:
- case R_PARISC_PCREL17C:
- r_field = e_fsel;
- goto do_basic_type_1;
- case R_PARISC_DIR21L:
- case R_PARISC_PCREL21L:
- r_field = e_lrsel;
- goto do_basic_type_1;
- case R_PARISC_DIR17R:
- case R_PARISC_PCREL17R:
- case R_PARISC_DIR14R:
- case R_PARISC_PCREL14R:
- r_field = e_rrsel;
- goto do_basic_type_1;
+ h = elf_link_hash_lookup (elf_hash_table (info), "$global$",
+ false, false, false);
- /* For all the DP relative relocations, we need to examine the symbol's
- section. If it's a code section, then "data pointer relative" makes
- no sense. In that case we don't adjust the "value", and for 21 bit
- addil instructions, we change the source addend register from %dp to
- %r0. */
- case R_PARISC_DPREL21L:
- r_field = e_lrsel;
- if (sym_sec->flags & SEC_CODE)
+ if (h != NULL
+ && h->root.type == bfd_link_hash_defined)
{
- if ((insn & 0xfc000000) >> 26 == 0xa
- && (insn & 0x03e00000) >> 21 == 0x1b)
- insn &= ~0x03e00000;
+ gp_val = h->root.u.def.value;
+ sec = h->root.u.def.section;
}
else
- value -= elf32_hppa_hash_table (info)->global_value;
- goto do_basic_type_1;
- case R_PARISC_DPREL14R:
- r_field = e_rrsel;
- if ((sym_sec->flags & SEC_CODE) == 0)
- value -= elf32_hppa_hash_table (info)->global_value;
- goto do_basic_type_1;
- case R_PARISC_DPREL14F:
- r_field = e_fsel;
- if ((sym_sec->flags & SEC_CODE) == 0)
- value -= elf32_hppa_hash_table (info)->global_value;
- goto do_basic_type_1;
-
- /* These cases are separate as they may involve a lot more work
- to deal with linker stubs. */
- case R_PARISC_PLABEL32:
- case R_PARISC_PLABEL21L:
- case R_PARISC_PLABEL14R:
- case R_PARISC_PCREL17F:
- {
- bfd_vma location;
- unsigned int len;
- char *new_name, *stub_name;
-
- /* Get the field selector right. We'll need it in a minute. */
- if (r_type == R_PARISC_PCREL17F
- || r_type == R_PARISC_PLABEL32)
- r_field = e_fsel;
- else if (r_type == R_PARISC_PLABEL21L)
- r_field = e_lrsel;
- else if (r_type == R_PARISC_PLABEL14R)
- r_field = e_rrsel;
-
- /* Find out where we are and where we're going. */
- location = (offset +
- input_section->output_offset +
- input_section->output_section->vma);
-
- len = strlen (sym_name) + 1;
- if (is_local)
- len += 9;
- new_name = bfd_malloc (len);
- if (!new_name)
- return bfd_reloc_notsupported;
- strcpy (new_name, sym_name);
-
- /* Local symbols have unique IDs. */
- if (is_local)
- sprintf (new_name + len - 10, "_%08x", (int)sym_sec);
-
- /* Any kind of linker stub needed? */
- if (((int)(value - location) > 0x3ffff)
- || ((int)(value - location) < -0x40000))
- {
- struct elf32_hppa_stub_hash_table *stub_hash_table;
- struct elf32_hppa_stub_hash_entry *stub_hash;
- asection *stub_section;
-
- /* Build a name for the stub. */
-
- len = strlen (new_name);
- len += 23;
- stub_name = bfd_malloc (len);
- if (!stub_name)
- return bfd_reloc_notsupported;
- elf32_hppa_name_of_stub (location, value, stub_name);
- strcat (stub_name, new_name);
- free (new_name);
-
- stub_hash_table = elf32_hppa_hash_table (info)->stub_hash_table;
-
- stub_hash
- = elf32_hppa_stub_hash_lookup (stub_hash_table, stub_name,
- false, false);
-
- /* We're done with that name. */
- free (stub_name);
-
- /* The stub BFD only has one section. */
- stub_section = stub_hash_table->stub_bfd->sections;
-
- if (stub_hash != NULL)
- {
- if (r_type == R_PARISC_PCREL17F)
- {
- unsigned long delay_insn;
- unsigned int opcode, rtn_reg, ldo_target_reg, ldo_src_reg;
-
- /* We'll need to peek at the next insn. */
- delay_insn = bfd_get_32 (input_bfd, hit_data + 4);
- opcode = get_opcode (delay_insn);
-
- /* We also need to know the return register for this
- call. */
- rtn_reg = (insn & 0x03e00000) >> 21;
-
- ldo_src_reg = (delay_insn & 0x03e00000) >> 21;
- ldo_target_reg = (delay_insn & 0x001f0000) >> 16;
-
- /* Munge up the value and other parameters for
- hppa_elf_relocate_insn. */
-
- value = (stub_hash->offset
- + stub_section->output_offset
- + stub_section->output_section->vma);
-
- r_format = 17;
- r_field = e_fsel;
- r_pcrel = 0;
- addend = 0;
-
- /* We need to peek at the delay insn and determine if
- we'll need to swap the branch and its delay insn. */
- if ((insn & 2)
- || (opcode == LDO
- && ldo_target_reg == rtn_reg)
- || (delay_insn == 0x08000240))
- {
- /* No need to swap the branch and its delay slot, but
- we do need to make sure to jump past the return
- pointer update in the stub. */
- value += 4;
-
- /* If the delay insn does a return pointer adjustment,
- then we have to make sure it stays valid. */
- if (opcode == LDO
- && ldo_target_reg == rtn_reg)
- {
- delay_insn &= 0xfc00ffff;
- delay_insn |= ((31 << 21) | (31 << 16));
- bfd_put_32 (input_bfd, delay_insn, hit_data + 4);
- }
- /* Use a BLE to reach the stub. */
- insn = BLE_SR4_R0;
- }
- else
- {
- /* Wonderful, we have to swap the call insn and its
- delay slot. */
- bfd_put_32 (input_bfd, delay_insn, hit_data);
- /* Use a BLE,n to reach the stub. */
- insn = (BLE_SR4_R0 | 0x2);
- bfd_put_32 (input_bfd, insn, hit_data + 4);
- insn = hppa_elf_relocate_insn (input_bfd,
- input_section,
- insn, offset + 4,
- value, addend,
- r_format, r_field,
- r_pcrel);
- /* Update the instruction word. */
- bfd_put_32 (input_bfd, insn, hit_data + 4);
- return bfd_reloc_dangerous;
- }
- }
- else
- return bfd_reloc_notsupported;
- }
- }
- goto do_basic_type_1;
- }
-
-do_basic_type_1:
- insn = hppa_elf_relocate_insn (input_bfd, input_section, insn,
- offset, value, addend, r_format,
- r_field, r_pcrel);
- break;
+ {
+ /* If $global$ isn't defined, we could make one up ourselves
+ from the start of .plt, .dlt, or .data For the time
+ being, just bomb. */
+ (*info->callbacks->undefined_symbol)
+ (info, "$global$", abfd, NULL, 0, true);
+ return false;
+ }
- /* Something we don't know how to handle. */
- default:
- return bfd_reloc_notsupported;
+ elf32_hppa_hash_table (info)->global_value = (gp_val
+ + sec->output_section->vma
+ + sec->output_offset);
}
- /* Update the instruction word. */
- bfd_put_32 (input_bfd, insn, hit_data);
- return (bfd_reloc_ok);
+ /* Invoke the standard linker. */
+ return bfd_elf_bfd_final_link (abfd, info);
}
/* Undo the generic ELF code's subtraction of section->vma from the
return true;
}
-/* Determine the name of the stub needed to perform a call assuming the
- argument relocation bits for caller and callee are in CALLER and CALLEE
- for a call from LOCATION to DESTINATION. Copy the name into STUB_NAME. */
-
-static void
-elf32_hppa_name_of_stub (location, destination, stub_name)
- bfd_vma location ATTRIBUTE_UNUSED;
- bfd_vma destination ATTRIBUTE_UNUSED;
- char *stub_name;
-{
- strcpy (stub_name, "_____long_branch_stub_");
-}
-
-/* Compute the size of the stub needed to call from LOCATION to DESTINATION
- (a function named SYM_NAME), with argument relocation bits CALLER and
- CALLEE. Return zero if no stub is needed to perform such a call. */
+/* Compute the size of the stub needed to call from INPUT_SEC (OFFSET)
+ to DESTINATION. Return zero if no stub is needed to perform such a
+ call. */
static unsigned int
-elf32_hppa_size_of_stub (location, destination, sym_name)
- bfd_vma location, destination;
- const char *sym_name;
+elf32_hppa_size_of_stub (input_sec, offset, destination)
+ asection *input_sec;
+ bfd_vma offset;
+ bfd_vma destination;
{
- /* Determine if a long branch stub is needed. */
- if (!(((int)(location - destination) > 0x3ffff)
- || ((int)(location - destination) < -0x40000)))
- return 0;
-
- if (!strncmp ("$$", sym_name, 2)
- && strcmp ("$$dyncall", sym_name))
- return 12;
- else
- return 16;
+ bfd_vma location;
+
+ /* Determine where the call point is. */
+ location = (input_sec->output_offset
+ + input_sec->output_section->vma
+ + offset);
+
+ /* Determine if a long branch stub is needed. parisc branch offsets
+ are relative to the second instruction past the branch, ie. +8
+ bytes on from the branch instruction location. The offset is
+ signed, 17 bits wide, and counts in units of 4 bytes.
+ bfd_vma is unsigned, so this is testing for offsets outside the
+ range -0x40000 to +0x3ffff */
+ if (destination - location - 8 + 0x40000 >= 0x80000)
+ return 8;
+ return 0;
}
/* Build one linker stub as defined by the stub hash table entry GEN_ENTRY.
- IN_ARGS contains the stub BFD and link info pointers. */
+ IN_ARG contains the link info pointer. */
+
+#define LDIL_R1 0x20200000 /* ldil LR'XXX,%r1 */
+#define BE_SR4_R1 0xe0202002 /* be,n RR'XXX(%sr4,%r1) */
static boolean
-elf32_hppa_build_one_stub (gen_entry, in_args)
+elf32_hppa_build_one_stub (gen_entry, in_arg)
struct bfd_hash_entry *gen_entry;
- PTR in_args;
+ PTR in_arg;
{
- void **args = (void **)in_args;
- bfd *stub_bfd = (bfd *)args[0];
- struct bfd_link_info *info = (struct bfd_link_info *)args[1];
- struct elf32_hppa_stub_hash_entry *entry;
- struct elf32_hppa_stub_hash_table *stub_hash_table;
+ struct elf32_hppa_stub_hash_entry *stub_entry;
+ struct elf32_hppa_link_hash_table *hppa_link_hash;
+ asection *stub_sec;
+ bfd *stub_bfd;
bfd_byte *loc;
symvalue sym_value;
- const char *sym_name;
+ int insn;
+
+ /* Massage our args to the form they really have. */
+ stub_entry = (struct elf32_hppa_stub_hash_entry *) gen_entry;
+ hppa_link_hash = (struct elf32_hppa_link_hash_table *) in_arg;
- /* Initialize pointers to the stub hash table, the particular entry we
- are building a stub for, and where (in memory) we should place the stub
- instructions. */
- entry = (struct elf32_hppa_stub_hash_entry *)gen_entry;
- stub_hash_table = elf32_hppa_hash_table(info)->stub_hash_table;
- loc = stub_hash_table->location;
+ stub_sec = stub_entry->stub_sec;
/* Make a note of the offset within the stubs for this entry. */
- entry->offset = stub_hash_table->offset;
+ stub_entry->offset = hppa_link_hash->offset[stub_sec->index];
+ loc = stub_sec->contents + stub_entry->offset;
- /* The symbol's name starts at offset 22. */
- sym_name = entry->root.string + 22;
+ sym_value = (stub_entry->target_value
+ + stub_entry->target_section->output_offset
+ + stub_entry->target_section->output_section->vma);
- sym_value = (entry->target_value
- + entry->target_section->output_offset
- + entry->target_section->output_section->vma);
+ stub_bfd = stub_sec->owner;
- if (1)
- {
- /* Create one of two variant long branch stubs. One for $$dyncall and
- normal calls, the other for calls to millicode. */
- unsigned long insn;
- int millicode_call = 0;
-
- if (!strncmp ("$$", sym_name, 2) && strcmp ("$$dyncall", sym_name))
- millicode_call = 1;
-
- /* First the return pointer adjustment. Depending on exact calling
- sequence this instruction may be skipped. */
- bfd_put_32 (stub_bfd, LDO_M4_R31_R31, loc);
-
- /* The next two instructions are the long branch itself. A long branch
- is formed with "ldil" loading the upper bits of the target address
- into a register, then branching with "be" which adds in the lower bits.
- Long branches to millicode nullify the delay slot of the "be". */
- insn = hppa_rebuild_insn (stub_bfd, LDIL_R1,
- hppa_field_adjust (sym_value, 0, e_lrsel), 21);
- bfd_put_32 (stub_bfd, insn, loc + 4);
- insn = hppa_rebuild_insn (stub_bfd, BE_SR4_R1 | (millicode_call ? 2 : 0),
- hppa_field_adjust (sym_value, 0, e_rrsel) >> 2,
- 17);
- bfd_put_32 (stub_bfd, insn, loc + 8);
-
- if (!millicode_call)
- {
- /* The sequence to call this stub places the return pointer into %r31,
- the final target expects the return pointer in %r2, so copy the
- return pointer into the proper register. */
- bfd_put_32 (stub_bfd, COPY_R31_R2, loc + 12);
-
- /* Update the location and offsets. */
- stub_hash_table->location += 16;
- stub_hash_table->offset += 16;
- }
- else
- {
- /* Update the location and offsets. */
- stub_hash_table->location += 12;
- stub_hash_table->offset += 12;
- }
+ /* Create the long branch. A long branch is formed with "ldil"
+ loading the upper bits of the target address into a register,
+ then branching with "be" which adds in the lower bits.
+ The "be" has its delay slot nullified. */
+ insn = hppa_rebuild_insn (LDIL_R1,
+ hppa_field_adjust (sym_value, 0, e_lrsel),
+ 21);
+ bfd_put_32 (stub_bfd, insn, loc);
+
+ insn = hppa_rebuild_insn (BE_SR4_R1,
+ hppa_field_adjust (sym_value, 0, e_rrsel) >> 2,
+ 17);
+ bfd_put_32 (stub_bfd, insn, loc + 4);
+
+ hppa_link_hash->offset[stub_sec->index] += 8;
+
+ return true;
+}
+
+/* As above, but don't actually build the stub. Just bump offset so
+ we know stub section sizes. */
+
+static boolean
+elf32_hppa_size_one_stub (gen_entry, in_arg)
+ struct bfd_hash_entry *gen_entry;
+ PTR in_arg;
+{
+ struct elf32_hppa_stub_hash_entry *stub_entry;
+ struct elf32_hppa_link_hash_table *hppa_link_hash;
+
+ /* Massage our args to the form they really have. */
+ stub_entry = (struct elf32_hppa_stub_hash_entry *) gen_entry;
+ hppa_link_hash = (struct elf32_hppa_link_hash_table *) in_arg;
+
+ hppa_link_hash->offset[stub_entry->stub_sec->index] += 8;
- }
return true;
}
table. This is called via hppaelf_finish in the linker. */
boolean
-elf32_hppa_build_stubs (stub_bfd, info)
+elf32_hppa_build_stubs (stub_bfd, link_info)
bfd *stub_bfd;
- struct bfd_link_info *info;
+ struct bfd_link_info *link_info;
{
- /* The stub BFD only has one section. */
- asection *stub_sec = stub_bfd->sections;
- struct elf32_hppa_stub_hash_table *table;
- unsigned int size;
- void *args[2];
-
- /* So we can pass both the BFD for the stubs and the link info
- structure to the routine which actually builds stubs. */
- args[0] = stub_bfd;
- args[1] = info;
-
- /* Allocate memory to hold the linker stubs. */
- size = bfd_section_size (stub_bfd, stub_sec);
- stub_sec->contents = (unsigned char *) bfd_zalloc (stub_bfd, size);
- if (stub_sec->contents == NULL)
- return false;
- table = elf32_hppa_hash_table(info)->stub_hash_table;
- table->location = stub_sec->contents;
+ asection *stub_sec;
+ struct bfd_hash_table *table;
+ struct elf32_hppa_link_hash_table *hppa_link_hash;
+
+ for (stub_sec = stub_bfd->sections; stub_sec; stub_sec = stub_sec->next)
+ {
+ unsigned int size;
+
+ /* Allocate memory to hold the linker stubs. */
+ size = bfd_section_size (stub_bfd, stub_sec);
+ stub_sec->contents = (unsigned char *) bfd_zalloc (stub_bfd, size);
+ if (stub_sec->contents == NULL && size != 0)
+ return false;
+ }
/* Build the stubs as directed by the stub hash table. */
- elf32_hppa_stub_hash_traverse (table, elf32_hppa_build_one_stub, args);
+ hppa_link_hash = elf32_hppa_hash_table (link_info);
+ memset (hppa_link_hash->offset, 0,
+ stub_bfd->section_count * sizeof (bfd_vma));
+
+ table = &hppa_link_hash->stub_hash_table;
+ bfd_hash_traverse (table, elf32_hppa_build_one_stub, hppa_link_hash);
return true;
}
The basic idea here is to examine all the relocations looking for
PC-relative calls to a target that is unreachable with a "bl"
instruction or calls where the caller and callee disagree on the
- location of their arguments or return value. */
+ location of their arguments or return value. Currently, we don't
+ support elf arg relocs. */
boolean
-elf32_hppa_size_stubs (stub_bfd, output_bfd, link_info)
+elf32_hppa_size_stubs (stub_bfd, link_info,
+ add_stub_section, layout_sections_again)
bfd *stub_bfd;
- bfd *output_bfd ATTRIBUTE_UNUSED;
struct bfd_link_info *link_info;
+ asection * (*add_stub_section) PARAMS ((const char *, asection *));
+ void (*layout_sections_again) PARAMS ((void));
{
bfd *input_bfd;
- asection *section, *stub_sec = 0;
- Elf_Internal_Shdr *symtab_hdr;
+ asection *section;
Elf_Internal_Sym *local_syms, **all_local_syms;
- unsigned int i, index, bfd_count = 0;
- struct elf32_hppa_stub_hash_table *stub_hash_table = 0;
-
- /* Create and initialize the stub hash table. */
- stub_hash_table = ((struct elf32_hppa_stub_hash_table *)
- bfd_malloc (sizeof (struct elf32_hppa_stub_hash_table)));
- if (!stub_hash_table)
- goto error_return;
-
- if (!elf32_hppa_stub_hash_table_init (stub_hash_table, stub_bfd,
- elf32_hppa_stub_hash_newfunc))
- goto error_return;
-
- /* Attach the hash tables to the main hash table. */
- elf32_hppa_hash_table(link_info)->stub_hash_table = stub_hash_table;
-
- /* Count the number of input BFDs. */
- for (input_bfd = link_info->input_bfds;
+ asection **stub_section_created;
+ unsigned int i, indx, bfd_count, sec_count;
+ asection *stub_sec;
+ asection *first_init_sec = NULL;
+ asection *first_fini_sec = NULL;
+ struct elf32_hppa_link_hash_table *hppa_link_hash;
+ struct bfd_hash_table *stub_hash_table;
+ boolean stub_changed;
+
+ /* Count the number of input BFDs and the total number of input sections. */
+ for (input_bfd = link_info->input_bfds, bfd_count = 0, sec_count = 0;
input_bfd != NULL;
input_bfd = input_bfd->link_next)
- bfd_count++;
-
- /* Magic as we know the stub bfd only has one section. */
- stub_sec = stub_bfd->sections;
-
- /* If generating a relocateable output file, then we don't
- have to examine the relocs. */
- if (link_info->relocateable)
{
- for (i = 0; i < bfd_count; i++)
- if (all_local_syms[i])
- free (all_local_syms[i]);
- free (all_local_syms);
- return true;
+ bfd_count += 1;
+ sec_count += input_bfd->section_count;
}
- /* Now that we have argument location information for all the global
- functions we can start looking for stubs. */
- for (input_bfd = link_info->input_bfds, index = 0;
+ stub_section_created
+ = (asection **) bfd_zmalloc (sizeof (asection *) * sec_count);
+ if (stub_section_created == NULL)
+ return false;
+
+ /* We want to read in symbol extension records only once. To do this
+ we need to read in the local symbols in parallel and save them for
+ later use; so hold pointers to the local symbols in an array. */
+ all_local_syms
+ = (Elf_Internal_Sym **) bfd_zmalloc (sizeof (Elf_Internal_Sym *)
+ * bfd_count);
+ if (all_local_syms == NULL)
+ goto error_ret_free_stub;
+
+ /* Walk over all the input BFDs adding entries to the args hash table
+ for all the external functions. */
+ for (input_bfd = link_info->input_bfds, indx = 0;
input_bfd != NULL;
- input_bfd = input_bfd->link_next, index++)
+ input_bfd = input_bfd->link_next, indx++)
{
+ Elf_Internal_Shdr *symtab_hdr;
+ Elf_Internal_Sym *isym;
+ Elf32_External_Sym *ext_syms, *esym;
+
/* We'll need the symbol table in a second. */
symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
if (symtab_hdr->sh_info == 0)
continue;
- local_syms = all_local_syms[index];
+ /* We need an array of the local symbols attached to the input bfd.
+ Unfortunately, we're going to have to read & swap them in. */
+ local_syms = (Elf_Internal_Sym *)
+ bfd_malloc (symtab_hdr->sh_info * sizeof (Elf_Internal_Sym));
+ if (local_syms == NULL)
+ {
+ goto error_ret_free_local;
+ }
+ all_local_syms[indx] = local_syms;
+ ext_syms = (Elf32_External_Sym *)
+ bfd_malloc (symtab_hdr->sh_info * sizeof (Elf32_External_Sym));
+ if (ext_syms == NULL)
+ {
+ goto error_ret_free_local;
+ }
+
+ if (bfd_seek (input_bfd, symtab_hdr->sh_offset, SEEK_SET) != 0
+ || (bfd_read (ext_syms, 1,
+ (symtab_hdr->sh_info * sizeof (Elf32_External_Sym)),
+ input_bfd)
+ != (symtab_hdr->sh_info * sizeof (Elf32_External_Sym))))
+ {
+ free (ext_syms);
+ goto error_ret_free_local;
+ }
+
+ /* Swap the local symbols in. */
+ isym = local_syms;
+ esym = ext_syms;
+ for (i = 0; i < symtab_hdr->sh_info; i++, esym++, isym++)
+ bfd_elf32_swap_symbol_in (input_bfd, esym, isym);
+
+ /* Now we can free the external symbols. */
+ free (ext_syms);
+ }
+
+ stub_hash_table = &elf32_hppa_hash_table (link_info)->stub_hash_table;
+
+ while (1)
+ {
+ stub_changed = 0;
- /* Walk over each section attached to the input bfd. */
- for (section = input_bfd->sections;
- section != NULL;
- section = section->next)
+ /* Now that we have argument location information for all the
+ global functions we can start looking for stubs. */
+ for (input_bfd = link_info->input_bfds, indx = 0, sec_count = 0;
+ input_bfd != NULL;
+ input_bfd = input_bfd->link_next, indx++)
{
- Elf_Internal_Shdr *input_rel_hdr;
- Elf32_External_Rela *external_relocs, *erelaend, *erela;
- Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
+ Elf_Internal_Shdr *symtab_hdr;
- /* If there aren't any relocs, then there's nothing to do. */
- if ((section->flags & SEC_RELOC) == 0
- || section->reloc_count == 0)
+ /* We'll need the symbol table in a second. */
+ symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
+ if (symtab_hdr->sh_info == 0)
continue;
- /* Allocate space for the external relocations. */
- external_relocs
- = ((Elf32_External_Rela *)
- bfd_malloc (section->reloc_count
- * sizeof (Elf32_External_Rela)));
- if (external_relocs == NULL)
- {
- for (i = 0; i < bfd_count; i++)
- if (all_local_syms[i])
- free (all_local_syms[i]);
- free (all_local_syms);
- goto error_return;
- }
+ local_syms = all_local_syms[indx];
- /* Likewise for the internal relocations. */
- internal_relocs
- = ((Elf_Internal_Rela *)
- bfd_malloc (section->reloc_count * sizeof (Elf_Internal_Rela)));
- if (internal_relocs == NULL)
+ /* Walk over each section attached to the input bfd. */
+ for (section = input_bfd->sections;
+ section != NULL;
+ section = section->next, sec_count++)
{
- free (external_relocs);
- for (i = 0; i < bfd_count; i++)
- if (all_local_syms[i])
- free (all_local_syms[i]);
- free (all_local_syms);
- goto error_return;
- }
+ Elf_Internal_Shdr *input_rel_hdr;
+ Elf32_External_Rela *external_relocs, *erelaend, *erela;
+ Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
- /* Read in the external relocs. */
- input_rel_hdr = &elf_section_data (section)->rel_hdr;
- if (bfd_seek (input_bfd, input_rel_hdr->sh_offset, SEEK_SET) != 0
- || bfd_read (external_relocs, 1, input_rel_hdr->sh_size,
- input_bfd) != input_rel_hdr->sh_size)
- {
- free (external_relocs);
- free (internal_relocs);
- for (i = 0; i < bfd_count; i++)
- if (all_local_syms[i])
- free (all_local_syms[i]);
- free (all_local_syms);
- goto error_return;
- }
+ /* If there aren't any relocs, then there's nothing to do. */
+ if ((section->flags & SEC_RELOC) == 0
+ || section->reloc_count == 0)
+ continue;
- /* Swap in the relocs. */
- erela = external_relocs;
- erelaend = erela + section->reloc_count;
- irela = internal_relocs;
- for (; erela < erelaend; erela++, irela++)
- bfd_elf32_swap_reloca_in (input_bfd, erela, irela);
+ /* Allocate space for the external relocations. */
+ external_relocs
+ = ((Elf32_External_Rela *)
+ bfd_malloc (section->reloc_count
+ * sizeof (Elf32_External_Rela)));
+ if (external_relocs == NULL)
+ {
+ goto error_ret_free_local;
+ }
- /* We're done with the external relocs, free them. */
- free (external_relocs);
+ /* Likewise for the internal relocations. */
+ internal_relocs = ((Elf_Internal_Rela *)
+ bfd_malloc (section->reloc_count
+ * sizeof (Elf_Internal_Rela)));
+ if (internal_relocs == NULL)
+ {
+ free (external_relocs);
+ goto error_ret_free_local;
+ }
- /* Now examine each relocation. */
- irela = internal_relocs;
- irelaend = irela + section->reloc_count;
- for (; irela < irelaend; irela++)
- {
- long r_type, size_of_stub;
- unsigned long r_index;
- struct elf_link_hash_entry *hash;
- struct elf32_hppa_stub_hash_entry *stub_hash;
- Elf_Internal_Sym *sym;
- asection *sym_sec;
- const char *sym_name;
- symvalue sym_value;
- bfd_vma location, destination;
- char *new_name = NULL;
-
- r_type = ELF32_R_TYPE (irela->r_info);
- r_index = ELF32_R_SYM (irela->r_info);
-
- if (r_type < 0 || r_type >= (int) R_PARISC_UNIMPLEMENTED)
+ /* Read in the external relocs. */
+ input_rel_hdr = &elf_section_data (section)->rel_hdr;
+ if (bfd_seek (input_bfd, input_rel_hdr->sh_offset, SEEK_SET) != 0
+ || bfd_read (external_relocs, 1,
+ input_rel_hdr->sh_size,
+ input_bfd) != input_rel_hdr->sh_size)
{
- bfd_set_error (bfd_error_bad_value);
+ free (external_relocs);
+ error_ret_free_internal:
free (internal_relocs);
- for (i = 0; i < bfd_count; i++)
- if (all_local_syms[i])
- free (all_local_syms[i]);
- free (all_local_syms);
- goto error_return;
+ goto error_ret_free_local;
}
- /* Only look for stubs on call instructions or plabel
- references. */
- if (r_type != R_PARISC_PCREL17F
- && r_type != R_PARISC_PLABEL32
- && r_type != R_PARISC_PLABEL21L
- && r_type != R_PARISC_PLABEL14R)
- continue;
+ /* Swap in the relocs. */
+ erela = external_relocs;
+ erelaend = erela + section->reloc_count;
+ irela = internal_relocs;
+ for (; erela < erelaend; erela++, irela++)
+ bfd_elf32_swap_reloca_in (input_bfd, erela, irela);
+
+ /* We're done with the external relocs, free them. */
+ free (external_relocs);
- /* Now determine the call target, its name, value, section
- and argument relocation bits. */
- hash = NULL;
- sym = NULL;
- sym_sec = NULL;
- if (r_index < symtab_hdr->sh_info)
+ /* Now examine each relocation. */
+ irela = internal_relocs;
+ irelaend = irela + section->reloc_count;
+ for (; irela < irelaend; irela++)
{
- /* It's a local symbol. */
- Elf_Internal_Shdr *hdr;
-
- sym = local_syms + r_index;
- hdr = elf_elfsections (input_bfd)[sym->st_shndx];
- sym_sec = hdr->bfd_section;
- sym_name = bfd_elf_string_from_elf_section (input_bfd,
- symtab_hdr->sh_link,
- sym->st_name);
- sym_value = (ELF_ST_TYPE (sym->st_info) == STT_SECTION
- ? 0 : sym->st_value);
- destination = (sym_value
- + sym_sec->output_offset
- + sym_sec->output_section->vma);
-
- /* Tack on an ID so we can uniquely identify this local
- symbol in the stub or arg info hash tables. */
- new_name = bfd_malloc (strlen (sym_name) + 10);
- if (new_name == 0)
+ unsigned int r_type, r_indx, size_of_stub;
+ struct elf32_hppa_stub_hash_entry *stub_entry;
+ asection *sym_sec;
+ const char *sym_name;
+ symvalue sym_value;
+ bfd_vma destination;
+ struct elf_link_hash_entry *hash;
+ char *stub_name;
+
+ r_type = ELF32_R_TYPE (irela->r_info);
+ r_indx = ELF32_R_SYM (irela->r_info);
+
+ if (r_type >= (unsigned int) R_PARISC_UNIMPLEMENTED)
{
- free (internal_relocs);
- for (i = 0; i < bfd_count; i++)
- if (all_local_syms[i])
- free (all_local_syms[i]);
- free (all_local_syms);
- goto error_return;
+ bfd_set_error (bfd_error_bad_value);
+ goto error_ret_free_internal;
}
- sprintf (new_name, "%s_%08x", sym_name, (int)sym_sec);
- sym_name = new_name;
- }
- else
- {
- /* It's an external symbol. */
- long index;
- index = r_index - symtab_hdr->sh_info;
- hash = elf_sym_hashes (input_bfd)[index];
- if (hash->root.type == bfd_link_hash_defined
- || hash->root.type == bfd_link_hash_defweak)
+ /* Only look for stubs on call instructions. */
+ if (r_type != (unsigned int) R_PARISC_PCREL17F)
+ continue;
+
+ /* Now determine the call target, its name, value, section
+ and argument relocation bits. */
+ sym_sec = NULL;
+ hash = NULL;
+ if (r_indx < symtab_hdr->sh_info)
{
- sym_sec = hash->root.u.def.section;
- sym_name = hash->root.root.string;
- sym_value = hash->root.u.def.value;
- destination = (sym_value
+ /* It's a local symbol. */
+ Elf_Internal_Sym *sym;
+ Elf_Internal_Shdr *hdr;
+
+ sym = local_syms + r_indx;
+ hdr = elf_elfsections (input_bfd)[sym->st_shndx];
+ sym_sec = hdr->bfd_section;
+ sym_name =
+ bfd_elf_string_from_elf_section (input_bfd,
+ symtab_hdr->sh_link,
+ sym->st_name);
+ sym_value = (ELF_ST_TYPE (sym->st_info) == STT_SECTION
+ ? 0 : sym->st_value);
+ destination = (sym_value + irela->r_addend
+ sym_sec->output_offset
+ sym_sec->output_section->vma);
}
else
{
- bfd_set_error (bfd_error_bad_value);
- free (internal_relocs);
- for (i = 0; i < bfd_count; i++)
- if (all_local_syms[i])
- free (all_local_syms[i]);
- free (all_local_syms);
- goto error_return;
- }
- }
+ /* It's an external symbol. */
+ int e_indx;
- /* Now determine where the call point is. */
- location = (section->output_offset
- + section->output_section->vma
- + irela->r_offset);
-
- /* We only care about the destination for PCREL function
- calls (eg. we don't care for PLABELS). */
- if (r_type != R_PARISC_PCREL17F)
- location = destination;
-
- /* Determine what (if any) linker stub is needed and its
- size (in bytes). */
- size_of_stub = elf32_hppa_size_of_stub (location,
- destination,
- sym_name);
- if (size_of_stub != 0)
- {
- char *stub_name;
- unsigned int len;
+ e_indx = r_indx - symtab_hdr->sh_info;
+ hash = elf_sym_hashes (input_bfd)[e_indx];
- /* Get the name of this stub. */
- len = strlen (sym_name);
- len += 23;
+ while (hash->root.type == bfd_link_hash_indirect
+ || hash->root.type == bfd_link_hash_warning)
+ hash = (struct elf_link_hash_entry *)
+ hash->root.u.i.link;
- stub_name = bfd_malloc (len);
- if (!stub_name)
- {
- /* Because sym_name was mallocd above for local
- symbols. */
- if (r_index < symtab_hdr->sh_info)
- free (new_name);
-
- free (internal_relocs);
- for (i = 0; i < bfd_count; i++)
- if (all_local_syms[i])
- free (all_local_syms[i]);
- free (all_local_syms);
- goto error_return;
+ if (hash->root.type == bfd_link_hash_undefined
+ || hash->root.type == bfd_link_hash_undefweak)
+ continue;
+
+ if (hash->root.type == bfd_link_hash_defined
+ || hash->root.type == bfd_link_hash_defweak)
+ {
+ sym_sec = hash->root.u.def.section;
+ sym_name = hash->root.root.string;
+ sym_value = hash->root.u.def.value;
+ destination = (sym_value + irela->r_addend
+ + sym_sec->output_offset
+ + sym_sec->output_section->vma);
+ }
+ else
+ {
+ bfd_set_error (bfd_error_bad_value);
+ goto error_ret_free_internal;
+ }
}
- elf32_hppa_name_of_stub (location, destination, stub_name);
- strcat (stub_name + 22, sym_name);
- /* Because sym_name was malloced above for local symbols. */
- if (r_index < symtab_hdr->sh_info)
- free (new_name);
+ /* Determine what (if any) linker stub is needed and its
+ size (in bytes). */
+ size_of_stub = elf32_hppa_size_of_stub (section,
+ irela->r_offset,
+ destination);
+ if (size_of_stub == 0)
+ continue;
+
+ /* Get the name of this stub. */
+ stub_name = elf32_hppa_stub_name (sym_name,
+ sym_sec,
+ section,
+ irela->r_addend,
+ hash);
+ if (!stub_name)
+ goto error_ret_free_internal;
- stub_hash
- = elf32_hppa_stub_hash_lookup (stub_hash_table, stub_name,
- false, false);
- if (stub_hash != NULL)
+ stub_entry = elf32_hppa_stub_hash_lookup (stub_hash_table,
+ stub_name,
+ false,
+ false);
+ if (stub_entry != NULL)
{
- /* The proper stub has already been created, nothing
- else to do. */
+ /* The proper stub has already been created. */
free (stub_name);
+ continue;
}
- else
+
+ stub_sec = stub_section_created[sec_count];
+ if (stub_sec == NULL)
{
- bfd_set_section_size (stub_bfd, stub_sec,
- (bfd_section_size (stub_bfd,
- stub_sec)
- + size_of_stub));
-
- /* Enter this entry into the linker stub hash table. */
- stub_hash
- = elf32_hppa_stub_hash_lookup (stub_hash_table,
- stub_name, true, true);
- if (stub_hash == NULL)
+ char *s_name;
+ int nstub;
+ int special_sec = 0;
+
+ /* We only want one stub for .init and .fini
+ because glibc splits the _init and _fini
+ functions into two parts. We don't want to
+ put a stub in the middle of a function. */
+ if (strncmp (section->name, ".init", 5) == 0)
+ {
+ stub_sec = first_init_sec;
+ special_sec = 1;
+ }
+ else if (strncmp (section->name, ".fini", 5) == 0)
+ {
+ stub_sec = first_fini_sec;
+ special_sec = 2;
+ }
+ if (stub_sec == NULL)
{
- free (stub_name);
- free (internal_relocs);
- for (i = 0; i < bfd_count; i++)
- if (all_local_syms[i])
- free (all_local_syms[i]);
- free (all_local_syms);
- goto error_return;
+ s_name = bfd_alloc (stub_bfd, 16);
+ if (s_name == NULL)
+ {
+ free (stub_name);
+ goto error_ret_free_internal;
+ }
+ nstub = stub_bfd->section_count;
+ sprintf (s_name, ".stub_%x", nstub);
+ stub_sec = (*add_stub_section) (s_name, section);
+ if (stub_sec == NULL)
+ {
+ free (stub_name);
+ goto error_ret_free_internal;
+ }
+ if (special_sec != 0)
+ {
+ if (special_sec == 1)
+ first_init_sec = stub_sec;
+ else
+ first_fini_sec = stub_sec;
+ }
}
+ stub_section_created[sec_count] = stub_sec;
+ }
- /* We'll need these to determine the address that the
- stub will branch to. */
- stub_hash->target_value = sym_value;
- stub_hash->target_section = sym_sec;
+ /* Enter this entry into the linker stub
+ hash table. */
+ stub_entry = elf32_hppa_stub_hash_lookup (stub_hash_table,
+ stub_name,
+ true,
+ false);
+ if (stub_entry == NULL)
+ {
+ (*_bfd_error_handler)
+ (_("%s: cannot find stub entry %s"),
+ bfd_get_filename (section->owner),
+ stub_name);
+ free (stub_name);
+ goto error_ret_free_internal;
}
- free (stub_name);
+
+ /* We'll need these to determine the address
+ that the stub will branch to. */
+ stub_entry->stub_sec = stub_sec;
+ stub_entry->offset = 0;
+ stub_entry->target_value = sym_value;
+ stub_entry->target_section = sym_sec;
+ stub_changed = 1;
}
+ /* We're done with the internal relocs, free them. */
+ free (internal_relocs);
}
- /* We're done with the internal relocs, free them. */
- free (internal_relocs);
}
+
+ if (!stub_changed)
+ break;
+
+ /* OK, we've added some stubs. Find out the new size of the
+ stub sections. */
+ hppa_link_hash = elf32_hppa_hash_table (link_info);
+ hppa_link_hash->offset = (bfd_vma *)
+ bfd_realloc (hppa_link_hash->offset,
+ stub_bfd->section_count * sizeof (bfd_vma));
+ if (hppa_link_hash->offset == NULL)
+ goto error_ret_free_local;
+
+ memset (hppa_link_hash->offset, 0,
+ stub_bfd->section_count * sizeof (bfd_vma));
+
+ bfd_hash_traverse (stub_hash_table,
+ elf32_hppa_size_one_stub,
+ hppa_link_hash);
+
+ for (stub_sec = stub_bfd->sections;
+ stub_sec != NULL;
+ stub_sec = stub_sec->next)
+ {
+ bfd_set_section_size (stub_bfd, stub_sec,
+ hppa_link_hash->offset[stub_sec->index]);
+ }
+ /* Ask the linker to do its stuff. */
+ (*layout_sections_again) ();
}
+
/* We're done with the local symbols, free them. */
for (i = 0; i < bfd_count; i++)
if (all_local_syms[i])
free (all_local_syms[i]);
free (all_local_syms);
+ free (stub_section_created);
return true;
-error_return:
- /* Return gracefully, avoiding dangling references to the hash tables. */
- if (stub_hash_table)
- {
- elf32_hppa_hash_table(link_info)->stub_hash_table = NULL;
- free (stub_hash_table);
- }
- /* Set the size of the stub section to zero since we're never going
- to create them. Avoids losing when we try to get its contents
- too. */
- bfd_set_section_size (stub_bfd, stub_sec, 0);
+ error_ret_free_local:
+ for (i = 0; i < bfd_count; i++)
+ if (all_local_syms[i])
+ free (all_local_syms[i]);
+ free (all_local_syms);
+
+ error_ret_free_stub:
+ free (stub_section_created);
return false;
}
/* Stuff for the BFD linker. */
#define elf_backend_relocate_section elf32_hppa_relocate_section
#define elf_backend_add_symbol_hook elf32_hppa_add_symbol_hook
+#define bfd_elf32_bfd_final_link elf32_hppa_final_link
+#if 0
+#define elf_backend_check_relocs elf32_hppa_check_relocs
+#endif
#define bfd_elf32_bfd_link_hash_table_create \
elf32_hppa_link_hash_table_create
#define elf_backend_fake_sections elf_hppa_fake_sections
projects / deliverable / binutils-gdb.git / blobdiff