#include "libcoff.h"
+#define APCS_26_FLAG( abfd ) (coff_data (abfd)->flags & F_APCS_26)
+#define APCS_FLOAT_FLAG( abfd ) (coff_data (abfd)->flags & F_APCS_FLOAT)
+#define PIC_FLAG( abfd ) (coff_data (abfd)->flags & F_PIC)
+#define APCS_SET( abfd ) (coff_data (abfd)->flags & F_APCS_SET)
+#define SET_APCS_FLAGS( abfd, flgs) (coff_data (abfd)->flags = \
+ (coff_data (abfd)->flags & ~ (F_APCS_26 | F_APCS_FLOAT | F_PIC)) \
+ | (flgs | F_APCS_SET))
+#define INTERWORK_FLAG( abfd ) (coff_data (abfd)->flags & F_INTERWORK)
+#define INTERWORK_SET( abfd ) (coff_data (abfd)->flags & F_INTERWORK_SET)
+#define SET_INTERWORK_FLAG( abfd, flg ) (coff_data (abfd)->flags = \
+ (coff_data (abfd)->flags & ~ F_INTERWORK) \
+ | (flg | F_INTERWORK_SET))
+
+
+static boolean coff_arm_relocate_section
+ PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
+ struct internal_reloc *, struct internal_syment *, asection **));
+
static bfd_reloc_status_type
aoutarm_fix_pcrel_26_done PARAMS ((bfd *, arelent *, asymbol *, PTR,
asection *, bfd *, char **));
aoutarm_fix_pcrel_26 PARAMS ((bfd *, arelent *, asymbol *, PTR,
asection *, bfd *, char **));
+static bfd_reloc_status_type
+coff_thumb_pcrel_23 PARAMS ((bfd *, arelent *, asymbol *, PTR,
+ asection *, bfd *, char **));
+
+static bfd_reloc_status_type
+coff_thumb_pcrel_12 PARAMS ((bfd *, arelent *, asymbol *, PTR,
+ asection *, bfd *, char **));
+
+static bfd_reloc_status_type
+coff_thumb_pcrel_9 PARAMS ((bfd *, arelent *, asymbol *, PTR,
+ asection *, bfd *, char **));
+
+static bfd_reloc_status_type
+coff_arm_reloc PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *,
+ char **));
-static bfd_reloc_status_type coff_arm_reloc
- PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
-static boolean coff_arm_adjust_symndx
- PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *,
- struct internal_reloc *, boolean *));
+static boolean
+coff_arm_adjust_symndx PARAMS ((bfd *, struct bfd_link_info *, bfd *,
+ asection *, struct internal_reloc *,
+ boolean *));
+
+/* The linker script knows the section names for placement.
+ The entry_names are used to do simple name mangling on the stubs.
+ Given a function name, and its type, the stub can be found. The
+ name can be changed. The only requirement is the %s be present.
+ */
+
+#define THUMB2ARM_GLUE_SECTION_NAME ".glue_7t"
+#define THUMB2ARM_GLUE_ENTRY_NAME "__%s_from_thumb"
+
+#define ARM2THUMB_GLUE_SECTION_NAME ".glue_7"
+#define ARM2THUMB_GLUE_ENTRY_NAME "__%s_from_arm"
/* Used by the assembler. */
static bfd_reloc_status_type
return bfd_reloc_continue;
}
+#define TARGET_UNDERSCORE '_'
+
#ifndef PCRELOFFSET
#define PCRELOFFSET true
#endif
+/* These most certainly belong somewhere else. Just had to get rid of
+ the manifest constants in the code. */
+
+#define ARM_8 0
+#define ARM_16 1
+#define ARM_32 2
+#define ARM_26 3
+#define ARM_DISP8 4
+#define ARM_DISP16 5
+#define ARM_DISP32 6
+#define ARM_26D 7
+/* 8 is unused */
+#define ARM_NEG16 9
+#define ARM_NEG32 10
+#define ARM_RVA32 11
+#define ARM_THUMB9 12
+#define ARM_THUMB12 13
+#define ARM_THUMB23 14
+
static reloc_howto_type aoutarm_std_reloc_howto[] =
{
/* type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask pcdone */
- HOWTO(0, /* type */
- 0, /* rs */
+ HOWTO(ARM_8, /* type */
+ 0, /* rightshift */
0, /* size */
- 8, /* bsz */
- false, /* pcrel */
+ 8, /* bitsize */
+ false, /* pc_relative */
0, /* bitpos */
- complain_overflow_bitfield, /* ovf */
- coff_arm_reloc, /* sf */
- "8", /*name */
- true, /* partial */
- 0x000000ff, /*read mask */
- 0x000000ff, /* setmask */
- PCRELOFFSET /* pcdone */),
- HOWTO(1,
+ complain_overflow_bitfield, /* complain_on_overflow */
+ coff_arm_reloc, /* special_function */
+ "ARM_8", /* name */
+ true, /* partial_inplace */
+ 0x000000ff, /* src_mask */
+ 0x000000ff, /* dst_mask */
+ PCRELOFFSET /* pcrel_offset */),
+ HOWTO(ARM_16,
0,
1,
16,
0,
complain_overflow_bitfield,
coff_arm_reloc,
- "16",
+ "ARM_16",
true,
0x0000ffff,
0x0000ffff,
PCRELOFFSET),
- HOWTO( 2,
+ HOWTO(ARM_32,
0,
2,
32,
0,
complain_overflow_bitfield,
coff_arm_reloc,
- "32",
+ "ARM_32",
true,
0xffffffff,
0xffffffff,
PCRELOFFSET),
- HOWTO( 3,
+ HOWTO(ARM_26,
2,
2,
26,
0,
complain_overflow_signed,
aoutarm_fix_pcrel_26 ,
- "ARM26",
+ "ARM_26",
false,
0x00ffffff,
0x00ffffff,
PCRELOFFSET),
- HOWTO( 4,
+ HOWTO(ARM_DISP8,
0,
0,
8,
0,
complain_overflow_signed,
coff_arm_reloc,
- "DISP8",
+ "ARM_DISP8",
true,
0x000000ff,
0x000000ff,
true),
- HOWTO( 5,
+ HOWTO( ARM_DISP16,
0,
1,
16,
0,
complain_overflow_signed,
coff_arm_reloc,
- "DISP16",
+ "ARM_DISP16",
true,
0x0000ffff,
0x0000ffff,
true),
- HOWTO( 6,
+ HOWTO( ARM_DISP32,
0,
2,
32,
0,
complain_overflow_signed,
coff_arm_reloc,
- "DISP32",
+ "ARM_DISP32",
true,
0xffffffff,
0xffffffff,
true),
- HOWTO( 7,
+ HOWTO( ARM_26D,
2,
2,
26,
0,
complain_overflow_signed,
aoutarm_fix_pcrel_26_done,
- "ARM26D",
+ "ARM_26D",
true,
0x00ffffff,
0x0,
false),
+ /* 8 is unused */
{-1},
- HOWTO( 9,
+ HOWTO( ARM_NEG16,
0,
-1,
16,
0,
complain_overflow_bitfield,
coff_arm_reloc,
- "NEG16",
+ "ARM_NEG16",
true,
0x0000ffff,
0x0000ffff,
false),
- HOWTO( 10,
+ HOWTO( ARM_NEG32,
0,
-2,
32,
0,
complain_overflow_bitfield,
coff_arm_reloc,
- "NEG32",
+ "ARM_NEG32",
true,
0xffffffff,
0xffffffff,
false),
- HOWTO( 11,
+ HOWTO( ARM_RVA32,
0,
2,
32,
0,
complain_overflow_bitfield,
coff_arm_reloc,
- "rva32",
+ "ARM_RVA32",
true,
0xffffffff,
0xffffffff,
PCRELOFFSET),
+ HOWTO( ARM_THUMB9,
+ 1,
+ 1,
+ 9,
+ true,
+ 0,
+ complain_overflow_signed,
+ coff_thumb_pcrel_9 ,
+ "ARM_THUMB9",
+ false,
+ 0x000000ff,
+ 0x000000ff,
+ PCRELOFFSET),
+ HOWTO( ARM_THUMB12,
+ 1,
+ 1,
+ 12,
+ true,
+ 0,
+ complain_overflow_signed,
+ coff_thumb_pcrel_12 ,
+ "ARM_THUMB12",
+ false,
+ 0x000007ff,
+ 0x000007ff,
+ PCRELOFFSET),
+ HOWTO( ARM_THUMB23,
+ 1,
+ 2,
+ 23,
+ true,
+ 0,
+ complain_overflow_signed,
+ coff_thumb_pcrel_23 ,
+ "ARM_THUMB23",
+ false,
+ 0x07ff07ff,
+ 0x07ff07ff,
+ PCRELOFFSET),
};
#ifdef COFF_WITH_PE
/* Return true if this relocation should
howto = aoutarm_std_reloc_howto + rel->r_type;
- if (rel->r_type == 11)
+ if (rel->r_type == ARM_RVA32)
{
*addendp -= pe_data(sec->output_section->owner)->pe_opthdr.ImageBase;
}
ARM26 to ARM26D relocs if possible. We return a fake howto in
this case without pcrel_offset set, and adjust the addend to
compensate. */
- if (rel->r_type == 3
+ if (rel->r_type == ARM_26
&& h != NULL
&& (h->root.type == bfd_link_hash_defined
|| h->root.type == bfd_link_hash_defweak)
&& h->root.u.def.section->output_section == sec->output_section)
{
static reloc_howto_type fake_arm26_reloc =
- HOWTO (3,
+ HOWTO (ARM_26,
2,
2,
26,
0,
complain_overflow_signed,
aoutarm_fix_pcrel_26 ,
- "ARM26",
+ "ARM_26",
false,
0x00ffffff,
0x00ffffff,
false);
*addendp -= rel->r_vaddr - sec->vma;
- return &fake_arm26_reloc;
+ return & fake_arm26_reloc;
}
return howto;
relocation -= input_section->output_section->vma;
relocation -= input_section->output_offset;
relocation -= addr;
+
if (relocation & 3)
return bfd_reloc_overflow;
/* Now the ARM magic... Change the reloc type so that it is marked as done.
Strictly this is only necessary if we are doing a partial relocation. */
- reloc_entry->howto = &aoutarm_std_reloc_howto[7];
+ reloc_entry->howto = &aoutarm_std_reloc_howto[ARM_26D];
+
+ return flag;
+}
+
+typedef enum {bunknown, b9, b12, b23} thumb_pcrel_branchtype;
+
+static bfd_reloc_status_type
+coff_thumb_pcrel_common (abfd, reloc_entry, symbol, data, input_section,
+ output_bfd, error_message, btype)
+ bfd *abfd;
+ arelent *reloc_entry;
+ asymbol *symbol;
+ PTR data;
+ asection *input_section;
+ bfd *output_bfd;
+ char **error_message;
+ thumb_pcrel_branchtype btype;
+{
+ bfd_vma relocation;
+ bfd_size_type addr = reloc_entry->address;
+ long target = bfd_get_32 (abfd, (bfd_byte *) data + addr);
+ bfd_reloc_status_type flag = bfd_reloc_ok;
+ bfd_vma dstmsk;
+ bfd_vma offmsk;
+ bfd_vma signbit;
+
+ /* NOTE: This routine is currently used by GAS, but not by the link
+ phase. */
+
+ switch (btype)
+ {
+ case b9:
+ dstmsk = 0x000000ff;
+ offmsk = 0x000001fe;
+ signbit = 0x00000100;
+ break;
+
+ case b12:
+ dstmsk = 0x000007ff;
+ offmsk = 0x00000ffe;
+ signbit = 0x00000800;
+ break;
+
+ case b23:
+ dstmsk = 0x07ff07ff;
+ offmsk = 0x007fffff;
+ signbit = 0x00400000;
+ break;
+
+ default:
+ abort ();
+ }
+
+ /* If this is an undefined symbol, return error */
+ if (symbol->section == &bfd_und_section
+ && (symbol->flags & BSF_WEAK) == 0)
+ return output_bfd ? bfd_reloc_continue : bfd_reloc_undefined;
+
+ /* If the sections are different, and we are doing a partial relocation,
+ just ignore it for now. */
+ if (symbol->section->name != input_section->name
+ && output_bfd != (bfd *)NULL)
+ return bfd_reloc_continue;
+
+ switch (btype)
+ {
+ case b9:
+ case b12:
+ relocation = ((target & dstmsk) << 1);
+ break;
+
+ case b23:
+ if (bfd_big_endian (abfd))
+ relocation = ((target & 0x7ff) << 1) | ((target & 0x07ff0000) >> 4);
+ else
+ relocation = ((target & 0x7ff) << 12) | ((target & 0x07ff0000) >> 15);
+ break;
+ }
+
+ relocation = (relocation ^ signbit) - signbit; /* Sign extend */
+ relocation += symbol->value;
+ relocation += symbol->section->output_section->vma;
+ relocation += symbol->section->output_offset;
+ relocation += reloc_entry->addend;
+ relocation -= input_section->output_section->vma;
+ relocation -= input_section->output_offset;
+ relocation -= addr;
+
+ if (relocation & 1)
+ return bfd_reloc_overflow;
+
+ /* Check for overflow */
+ if (relocation & signbit)
+ {
+ if ((relocation & ~offmsk) != ~offmsk)
+ flag = bfd_reloc_overflow;
+ }
+ else if (relocation & ~offmsk)
+ flag = bfd_reloc_overflow;
+
+ target &= ~dstmsk;
+ switch (btype)
+ {
+ case b9:
+ case b12:
+ target |= (relocation >> 1);
+ break;
+
+ case b23:
+ if (bfd_big_endian (abfd))
+ target |= ((relocation & 0xfff) >> 1) | ((relocation << 4) & 0x07ff0000);
+ else
+ target |= ((relocation & 0xffe) << 15) | ((relocation >> 12) & 0x7ff);
+ break;
+ }
+ bfd_put_32 (abfd, target, (bfd_byte *) data + addr);
+
+ /* Now the ARM magic... Change the reloc type so that it is marked as done.
+ Strictly this is only necessary if we are doing a partial relocation. */
+ reloc_entry->howto = & aoutarm_std_reloc_howto [ARM_26D];
+
+ /* TODO: We should possibly have DONE entries for the THUMB PCREL relocations */
return flag;
}
+static bfd_reloc_status_type
+coff_thumb_pcrel_23 (abfd, reloc_entry, symbol, data, input_section,
+ output_bfd, error_message)
+ bfd *abfd;
+ arelent *reloc_entry;
+ asymbol *symbol;
+ PTR data;
+ asection *input_section;
+ bfd *output_bfd;
+ char **error_message;
+{
+ return coff_thumb_pcrel_common (abfd, reloc_entry, symbol, data,
+ input_section, output_bfd, error_message, b23);
+}
+
+static bfd_reloc_status_type
+coff_thumb_pcrel_12 (abfd, reloc_entry, symbol, data, input_section,
+ output_bfd, error_message)
+ bfd *abfd;
+ arelent *reloc_entry;
+ asymbol *symbol;
+ PTR data;
+ asection *input_section;
+ bfd *output_bfd;
+ char **error_message;
+{
+ return coff_thumb_pcrel_common (abfd, reloc_entry, symbol, data,
+ input_section, output_bfd, error_message, b12);
+}
+
+static bfd_reloc_status_type
+coff_thumb_pcrel_9 (abfd, reloc_entry, symbol, data, input_section,
+ output_bfd, error_message)
+ bfd *abfd;
+ arelent *reloc_entry;
+ asymbol *symbol;
+ PTR data;
+ asection *input_section;
+ bfd *output_bfd;
+ char **error_message;
+{
+ return coff_thumb_pcrel_common (abfd, reloc_entry, symbol, data,
+ input_section, output_bfd, error_message, b9);
+}
+
static CONST struct reloc_howto_struct *
arm_reloc_type_lookup(abfd,code)
switch (code)
{
- ASTD (BFD_RELOC_16, 1);
- ASTD (BFD_RELOC_32, 2);
- ASTD (BFD_RELOC_ARM_PCREL_BRANCH, 3);
- ASTD (BFD_RELOC_8_PCREL, 4);
- ASTD (BFD_RELOC_16_PCREL, 5);
- ASTD (BFD_RELOC_32_PCREL, 6);
- ASTD (BFD_RELOC_RVA, 11);
+ ASTD (BFD_RELOC_8, ARM_8);
+ ASTD (BFD_RELOC_16, ARM_16);
+ ASTD (BFD_RELOC_32, ARM_32);
+ ASTD (BFD_RELOC_ARM_PCREL_BRANCH, ARM_26);
+ ASTD (BFD_RELOC_8_PCREL, ARM_DISP8);
+ ASTD (BFD_RELOC_16_PCREL, ARM_DISP16);
+ ASTD (BFD_RELOC_32_PCREL, ARM_DISP32);
+ ASTD (BFD_RELOC_RVA, ARM_RVA32);
+ ASTD (BFD_RELOC_THUMB_PCREL_BRANCH9, ARM_THUMB9);
+ ASTD (BFD_RELOC_THUMB_PCREL_BRANCH12, ARM_THUMB12);
+ ASTD (BFD_RELOC_THUMB_PCREL_BRANCH23, ARM_THUMB23);
default: return (CONST struct reloc_howto_struct *) 0;
}
}
#define BADMAG(x) ARMBADMAG(x)
#define ARM 1 /* Customize coffcode.h */
+/* The set of global variables that mark the total size of each kind
+ of glue required. */
+long int global_thumb_glue_size = 0;
+long int global_arm_glue_size = 0;
+
+bfd* bfd_of_glue_owner = 0;
+
+/* some typedefs for holding instructions */
+typedef unsigned long int insn32;
+typedef unsigned short int insn16;
+
+\f
+/* The thumb form of a long branch is a bit finicky, because the offset
+ encoding is split over two fields, each in it's own instruction. They
+ can occur in any order. So given a thumb form of long branch, and an
+ offset, insert the offset into the thumb branch and return finished
+ instruction.
+
+ It takes two thumb instructions to encode the target address. Each has
+ 11 bits to invest. The upper 11 bits are stored in one (identifed by
+ H-0.. see below), the lower 11 bits are stored in the other (identified
+ by H-1).
+
+ Combine together and shifted left by 1 (it's a half word address) and
+ there you have it.
+
+ Op: 1111 = F,
+ H-0, upper address-0 = 000
+ Op: 1111 = F,
+ H-1, lower address-0 = 800
+
+ They can be ordered either way, but the arm tools I've seen always put
+ the lower one first. It probably doesn't matter. krk@cygnus.com
+
+ XXX: Actually the order does matter. The second instruction (H-1)
+ moves the computed address into the PC, so it must be the second one
+ in the sequence. The problem, however is that whilst little endian code
+ stores the instructions in HI then LOW order, big endian code does the
+ reverse. nickc@cygnus.com */
+
+#define LOW_HI_ORDER 0xF800F000
+#define HI_LOW_ORDER 0xF000F800
+
+static insn32
+insert_thumb_branch (br_insn, rel_off)
+ insn32 br_insn;
+ int rel_off;
+{
+ unsigned int low_bits;
+ unsigned int high_bits;
-/* We use the special COFF backend linker. */
-#define coff_relocate_section _bfd_coff_generic_relocate_section
-
-/* When doing a relocateable link, we want to convert ARM26 relocs
- into ARM26D relocs. */
-static boolean
-coff_arm_adjust_symndx (obfd, info, ibfd, sec, irel, adjustedp)
- bfd *obfd;
- struct bfd_link_info *info;
- bfd *ibfd;
- asection *sec;
- struct internal_reloc *irel;
- boolean *adjustedp;
-{
- if (irel->r_type == 3)
- {
- struct coff_link_hash_entry *h;
+ BFD_ASSERT((rel_off & 1) != 1);
- h = obj_coff_sym_hashes (ibfd)[irel->r_symndx];
- if (h != NULL
- && (h->root.type == bfd_link_hash_defined
- || h->root.type == bfd_link_hash_defweak)
- && h->root.u.def.section->output_section == sec->output_section)
- irel->r_type = 7;
- }
- *adjustedp = false;
- return true;
-}
+ rel_off >>= 1; /* half word aligned address */
+ low_bits = rel_off & 0x000007FF; /* the bottom 11 bits */
+ high_bits = ( rel_off >> 11 ) & 0x000007FF; /* the top 11 bits */
+ if ((br_insn & LOW_HI_ORDER) == LOW_HI_ORDER)
+ br_insn = LOW_HI_ORDER | (low_bits << 16) | high_bits;
+ else if ((br_insn & HI_LOW_ORDER) == HI_LOW_ORDER)
+ br_insn = HI_LOW_ORDER | (high_bits << 16) | low_bits;
+ else
+ abort(); /* error - not a valid branch instruction form */
-#define APCS_FLAG( abfd ) (coff_data (abfd)->flags & F_APCS_26)
-#define APCS_SET( abfd ) (coff_data (abfd)->flags & F_APCS_SET)
-#define SET_APCS_FLAG( abfd, flg ) (coff_data (abfd)->flags = (coff_data (abfd)->flags & ~ F_APCS_26) | (flg | F_APCS_SET))
+ /* FIXME: abort is probably not the right call. krk@cygnus.com */
-/* Called when merging the private data areas of two BFDs.
- This is important as it allows us to detect if we are
- attempting to merge binaries compiled for different ARM
- targets, eg different CPUs or differents APCS's. */
+ return br_insn;
+}
-static boolean
-coff_arm_bfd_merge_private_bfd_data (ibfd, obfd)
- bfd * ibfd;
- bfd * obfd;
+\f
+static struct coff_link_hash_entry *
+find_thumb_glue (info, name, input_bfd)
+ struct bfd_link_info * info;
+ char * name;
+ bfd * input_bfd;
{
- BFD_ASSERT (ibfd != NULL && obfd != NULL);
+ char *tmp_name = 0;
- if (ibfd == obfd)
- return true;
+ struct coff_link_hash_entry *myh = 0;
- /* If the two formats are different we cannot check anything */
- if (ibfd->xvec != obfd->xvec)
- return true;
+ tmp_name = ((char *)
+ bfd_malloc (strlen (name) + strlen (THUMB2ARM_GLUE_ENTRY_NAME)));
- /* Verify that the APCS is the same for the two BFDs */
- if (APCS_SET (ibfd))
- {
- if (APCS_SET (obfd))
- {
- /* If the src and dest have different APCS flag bits set, fail */
- if (APCS_FLAG (obfd) != APCS_FLAG (ibfd))
- {
- _bfd_error_handler
- ("%s: ERROR: compiled for APCS-%d whereas target %s uses APCS-%d",
- bfd_get_filename (ibfd), APCS_FLAG (ibfd) ? 26 : 32,
- bfd_get_filename (obfd), APCS_FLAG (obfd) ? 26 : 32
- );
+ BFD_ASSERT (tmp_name);
- bfd_set_error (bfd_error_wrong_format);
- return false;
- }
- }
- else
- {
- SET_APCS_FLAG (obfd, APCS_FLAG (ibfd));
-
- /* Set up the arch and fields as well as these are probably wrong */
- bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), bfd_get_mach (ibfd));
- }
+ sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name);
+
+ myh = coff_link_hash_lookup (coff_hash_table (info),
+ tmp_name,
+ false, false, true);
+ if (myh == NULL)
+ {
+ _bfd_error_handler ("%s: unable to find THUMB glue '%s' for `%s'",
+ bfd_get_filename (input_bfd), tmp_name, name);
}
- return true;
-}
-
+ free (tmp_name);
-/* Display the flags field */
-
-static boolean
-coff_arm_bfd_print_private_bfd_data (abfd, ptr)
- bfd * abfd;
- PTR ptr;
-{
- FILE * file = (FILE *) ptr;
-
- BFD_ASSERT (abfd != NULL && ptr != NULL)
-
- fprintf (file, "private flags = %x", coff_data( abfd )->flags);
-
- if (APCS_SET (abfd))
- fprintf (file, ": [APCS-%d]", APCS_FLAG( abfd ) ? 26 : 32);
-
- fputc ('\n', file);
-
- return true;
+ return myh;
}
-
-/* Copies the given flags into the coff_tdata.flags field.
- Typically these flags come from the f_flags[] field of
- the COFF filehdr structure, which contains important,
- target specific information. */
-
-boolean
-coff_arm_bfd_set_private_flags (abfd, flags)
- bfd * abfd;
- flagword flags;
+static struct coff_link_hash_entry *
+find_arm_glue (info, name, input_bfd)
+ struct bfd_link_info * info;
+ char * name;
+ bfd * input_bfd;
{
- int flag;
+ char *tmp_name = 0;
+ struct coff_link_hash_entry *myh = 0;
- BFD_ASSERT (abfd != NULL);
+ tmp_name = ((char *)
+ bfd_malloc (strlen (name) + strlen (ARM2THUMB_GLUE_ENTRY_NAME)));
- flag = (flags & F_APCS26) ? F_APCS_26 : 0;
+ BFD_ASSERT (tmp_name);
- /* Make sure that the APCS field has not been initialised to the opposite value */
- if (APCS_SET (abfd) && (APCS_FLAG (abfd) != flag))
- return false;
+ sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name);
+
+ myh = coff_link_hash_lookup (coff_hash_table (info),
+ tmp_name,
+ false, false, true);
- SET_APCS_FLAG (abfd, flag);
+ if (myh == NULL)
+ {
+ _bfd_error_handler ("%s: unable to find ARM glue '%s' for `%s'",
+ bfd_get_filename (input_bfd), tmp_name, name);
+ }
- return true;
-}
+ free (tmp_name);
+ return myh;
+}
-/* Copy the important parts of the target specific data
- from one instance of a BFD to another. */
+/*
+ ARM->Thumb glue:
+
+ .arm
+ __func_from_arm:
+ ldr r12, __func_addr
+ bx r12
+ __func_addr:
+ .word func @ behave as if you saw a ARM_32 reloc
+
+ ldr ip,8 <__func_addr> e59fc000
+ bx ip e12fff1c
+ .word func 00000001
+
+*/
+
+#define ARM2THUMB_GLUE_SIZE 12
+static insn32
+ a2t1_ldr_insn = 0xe59fc000,
+ a2t2_bx_r12_insn = 0xe12fff1c,
+ a2t3_func_addr_insn = 0x00000001;
+
+/*
+ Thumb->ARM:
+
+ .thumb
+ .align 2
+ __func_from_thumb:
+ bx pc
+ nop
+ .arm
+ __func_change_to_arm:
+ b func
+
+
+ bx pc 4778
+ nop 0000
+ b func eafffffe
+
+*/
+
+#define THUMB2ARM_GLUE_SIZE 8
+static insn16
+ t2a1_bx_pc_insn = 0x4778,
+ t2a2_noop_insn = 0x46c0;
+static insn32
+ t2a3_b_insn = 0xea000000;
+
+/* TODO:
+ We should really create new local (static) symbols in destination
+ object for each stub we create. We should also create local
+ (static) symbols within the stubs when switching between ARM and
+ Thumb code. This will ensure that the debugger and disassembler
+ can present a better view of stubs.
+
+ We can treat stubs like literal sections, and for the THUMB9 ones
+ (short addressing range) we should be able to insert the stubs
+ between sections. i.e. the simplest approach (since relocations
+ are done on a section basis) is to dump the stubs at the end of
+ processing a section. That way we can always try and minimise the
+ offset to and from a stub. However, this does not map well onto
+ the way that the linker/BFD does its work: mapping all input
+ sections to output sections via the linker script before doing
+ all the processing.
+
+ Unfortunately it may be easier to just to disallow short range
+ Thumb->ARM stubs (i.e. no conditional inter-working branches,
+ only branch-and-link (BL) calls. This will simplify the processing
+ since we can then put all of the stubs into their own section.
+
+ TODO:
+ On a different subject, rather than complaining when a
+ branch cannot fit in the number of bits available for the
+ instruction we should generate a trampoline stub (needed to
+ address the complete 32bit address space). */
+
+/* The standard COFF backend linker does not cope with the special
+ Thumb BRANCH23 relocation. The alternative would be to split the
+ BRANCH23 into seperate HI23 and LO23 relocations. However, it is a
+ bit simpler simply providing our own relocation driver. */
+
+/* The reloc processing routine for the ARM/Thumb COFF linker. NOTE:
+ This code is a very slightly modified copy of
+ _bfd_coff_generic_relocate_section. It would be a much more
+ maintainable solution to have a MACRO that could be expanded within
+ _bfd_coff_generic_relocate_section that would only be provided for
+ ARM/Thumb builds. It is only the code marked THUMBEXTENSION that
+ is different from the original. */
static boolean
-coff_arm_bfd_copy_private_bfd_data (src, dest)
- bfd * src;
- bfd * dest;
+coff_arm_relocate_section (output_bfd, info, input_bfd, input_section,
+ contents, relocs, syms, sections)
+ bfd *output_bfd;
+ struct bfd_link_info *info;
+ bfd *input_bfd;
+ asection *input_section;
+ bfd_byte *contents;
+ struct internal_reloc *relocs;
+ struct internal_syment *syms;
+ asection **sections;
{
- BFD_ASSERT (src != NULL && dest != NULL);
-
- if (src == dest)
- return true;
+ struct internal_reloc *rel;
+ struct internal_reloc *relend;
- /* If the destination is not in the same format as the source, do not do the copy */
- if (src->xvec != dest->xvec)
- return true;
+ rel = relocs;
+ relend = rel + input_section->reloc_count;
- /* copy the flags field */
- if (APCS_SET (src))
+ for (; rel < relend; rel++)
{
- if (APCS_SET (dest))
+ int done = 0;
+ long symndx;
+ struct coff_link_hash_entry *h;
+ struct internal_syment *sym;
+ bfd_vma addend;
+ bfd_vma val;
+ reloc_howto_type *howto;
+ bfd_reloc_status_type rstat;
+ bfd_vma h_val;
+
+ symndx = rel->r_symndx;
+
+ if (symndx == -1)
{
- /* If the src and dest have different APCS flag bits set, fail */
- if (APCS_FLAG (dest) != APCS_FLAG (src))
- return false;
+ h = NULL;
+ sym = NULL;
}
else
- SET_APCS_FLAG (dest, APCS_FLAG (src));
- }
+ {
+ h = obj_coff_sym_hashes (input_bfd)[symndx];
+ sym = syms + symndx;
+ }
- return true;
-}
+ /* COFF treats common symbols in one of two ways. Either the
+ size of the symbol is included in the section contents, or it
+ is not. We assume that the size is not included, and force
+ the rtype_to_howto function to adjust the addend as needed. */
+ if (sym != NULL && sym->n_scnum != 0)
+ addend = - sym->n_value;
+ else
+ addend = 0;
+
+
+ howto = bfd_coff_rtype_to_howto (input_bfd, input_section, rel, h,
+ sym, &addend);
+ if (howto == NULL)
+ return false;
+
+ /* If we are doing a relocateable link, then we can just ignore
+ a PC relative reloc that is pcrel_offset. It will already
+ have the correct value. If this is not a relocateable link,
+ then we should ignore the symbol value. */
+ if (howto->pc_relative && howto->pcrel_offset)
+ {
+ if (info->relocateable)
+ continue;
+ if (sym != NULL && sym->n_scnum != 0)
+ addend += sym->n_value;
+ }
+
+ /* If we are doing a relocateable link, then we can just ignore
+ a PC relative reloc that is pcrel_offset. It will already
+ have the correct value. */
+ if (info->relocateable
+ && howto->pc_relative
+ && howto->pcrel_offset)
+ continue;
+
+ val = 0;
+
+ if (h == NULL)
+ {
+ asection *sec;
-#define coff_adjust_symndx coff_arm_adjust_symndx
+ if (symndx == -1)
+ {
+ sec = bfd_abs_section_ptr;
+ val = 0;
+ }
+ else
+ {
+ sec = sections[symndx];
+ val = (sec->output_section->vma
+ + sec->output_offset
+ + sym->n_value
+ - sec->vma);
+ }
+ }
+ else
+ {
+#if 1 /* THUMBEXTENSION */
+ /* We don't output the stubs if we are generating a
+ relocatable output file, since we may as well leave the
+ stub generation to the final linker pass. If we fail to
+ verify that the name is defined, we'll try to build stubs
+ for an undefined name... */
+ if (! info->relocateable
+ && ( h->root.type == bfd_link_hash_defined
+ || h->root.type == bfd_link_hash_defweak))
+ {
+ asection * sec;
+ asection * h_sec = h->root.u.def.section;
+ const char * name = h->root.root.string;
+
+ /* h locates the symbol referenced in the reloc. */
+ h_val = (h->root.u.def.value
+ + h_sec->output_section->vma
+ + h_sec->output_offset);
+
+ if (howto->type == ARM_26)
+ {
+ if ( h->class == C_THUMBSTATFUNC
+ || h->class == C_THUMBEXTFUNC)
+ {
+ /* Arm code calling a Thumb function */
+ signed long int final_disp;
+ unsigned long int tmp;
+ long int my_offset;
+ long int offset;
+ asection * s = 0;
+ unsigned long int return_address;
+ long int ret_offset;
+ long int disp;
+ struct coff_link_hash_entry * myh;
+
+ myh = find_arm_glue (info, name, input_bfd);
+ if (myh == NULL)
+ return false;
+
+ my_offset = myh->root.u.def.value;
+
+ s = bfd_get_section_by_name (bfd_of_glue_owner,
+ ARM2THUMB_GLUE_SECTION_NAME);
+ BFD_ASSERT (s != NULL);
+ BFD_ASSERT (s->contents != NULL);
+
+ if ((my_offset & 0x01) == 0x01)
+ {
+ if (INTERWORK_SET (h_sec->owner) && ! INTERWORK_FLAG (h_sec->owner))
+ _bfd_error_handler ("%s: warning: interworking not enabled.",
+ bfd_get_filename (h_sec->owner));
+
+ --my_offset;
+ myh->root.u.def.value = my_offset;
+
+ bfd_put_32 (output_bfd, a2t1_ldr_insn, s->contents + my_offset);
+
+ bfd_put_32 (output_bfd, a2t2_bx_r12_insn, s->contents + my_offset + 4);
+
+ /* It's a thumb address. Add the low order bit. */
+ bfd_put_32 (output_bfd, h_val | a2t3_func_addr_insn, s->contents + my_offset + 8);
+ }
+
+ BFD_ASSERT (my_offset <= global_arm_glue_size);
+
+ tmp = bfd_get_32 (input_bfd, contents + rel->r_vaddr - input_section->vma);
+
+ tmp = tmp & 0xFF000000;
+
+ /* Somehow these are both 4 too far, so subtract 8. */
+ ret_offset =
+ s->output_offset
+ + my_offset
+ + s->output_section->vma
+ - (input_section->output_offset
+ + input_section->output_section->vma
+ + rel->r_vaddr)
+ - 8;
+
+ tmp = tmp | ((ret_offset >> 2) & 0x00FFFFFF);
+
+ bfd_put_32 (output_bfd, tmp, contents + rel->r_vaddr - input_section->vma);
+
+ done = 1;
+ }
+ }
+
+ /* Note: We used to check for ARM_THUMB9 and ARM_THUMB12 */
+ else if (howto->type == ARM_THUMB23)
+ {
+ if ( h->class == C_EXT
+ || h->class == C_STAT
+ || h->class == C_LABEL)
+ {
+ /* Thumb code calling an ARM function */
+ unsigned long int return_address;
+ signed long int final_disp;
+ asection * s = 0;
+ long int my_offset;
+ unsigned long int tmp;
+ long int ret_offset;
+ struct coff_link_hash_entry * myh;
+
+ myh = find_thumb_glue (info, name, input_bfd);
+ if (myh == NULL)
+ return false;
+
+ my_offset = myh->root.u.def.value;
+
+ s = bfd_get_section_by_name (bfd_of_glue_owner,
+ THUMB2ARM_GLUE_SECTION_NAME);
+
+ BFD_ASSERT (s != NULL);
+ BFD_ASSERT (s->contents != NULL);
+
+ if ((my_offset & 0x01) == 0x01)
+ {
+ if (INTERWORK_SET (h_sec->owner) && ! INTERWORK_FLAG (h_sec->owner))
+ _bfd_error_handler ("%s: warning: interworking not enabled.",
+ bfd_get_filename (h_sec->owner));
+
+ -- my_offset;
+ myh->root.u.def.value = my_offset;
+
+ bfd_put_16 (output_bfd, t2a1_bx_pc_insn,
+ s->contents + my_offset);
+
+ bfd_put_16 (output_bfd, t2a2_noop_insn,
+ s->contents + my_offset + 2);
+
+ ret_offset =
+ ((signed)h_val) -
+ ((signed)(s->output_offset
+ + my_offset
+ + s->output_section->vma))
+ - 12;
+
+ t2a3_b_insn |= ((ret_offset >> 2) & 0x00FFFFFF);
+
+ bfd_put_32 (output_bfd, t2a3_b_insn, s->contents + my_offset + 4);
+ }
+
+ BFD_ASSERT (my_offset <= global_thumb_glue_size);
+
+ /* Now go back and fix up the original bl insn to point here. */
+ ret_offset =
+ s->output_offset
+ + my_offset
+ - (input_section->output_offset
+ + rel->r_vaddr)
+ -4;
+
+ tmp = bfd_get_32 (input_bfd, contents + rel->r_vaddr - input_section->vma);
+
+ bfd_put_32 (output_bfd,
+ insert_thumb_branch (tmp, ret_offset),
+ contents + rel->r_vaddr - input_section->vma);
+
+ done = 1;
+ }
+ }
+ }
+
+ /* If the relocation type and destination symbol does not
+ fall into one of the above categories, then we can just
+ perform a direct link. */
+
+ if (done)
+ rstat = bfd_reloc_ok;
+ else
+#endif /* THUMBEXTENSION */
+ if ( h->root.type == bfd_link_hash_defined
+ || h->root.type == bfd_link_hash_defweak)
+ {
+ asection *sec;
+
+ sec = h->root.u.def.section;
+ val = (h->root.u.def.value
+ + sec->output_section->vma
+ + sec->output_offset);
+ }
+
+ else if (! info->relocateable)
+ {
+ if (! ((*info->callbacks->undefined_symbol)
+ (info, h->root.root.string, input_bfd, input_section,
+ rel->r_vaddr - input_section->vma)))
+ return false;
+ }
+ }
+
+ if (info->base_file)
+ {
+ /* Emit a reloc if the backend thinks it needs it. */
+ if (sym && pe_data(output_bfd)->in_reloc_p(output_bfd, howto))
+ {
+ /* relocation to a symbol in a section which
+ isn't absolute - we output the address here
+ to a file */
+ bfd_vma addr = rel->r_vaddr
+ - input_section->vma
+ + input_section->output_offset
+ + input_section->output_section->vma;
+ if (coff_data(output_bfd)->pe)
+ addr -= pe_data(output_bfd)->pe_opthdr.ImageBase;
+ /* FIXME: Shouldn't 4 be sizeof (addr)? */
+ fwrite (&addr, 1,4, (FILE *) info->base_file);
+ }
+ }
+
+#if 1 /* THUMBEXTENSION */
+ if (done)
+ ;
+ /* Only perform this fix during the final link, not a relocatable link. nickc@cygnus.com */
+ else if (! info->relocateable
+ && howto->type == ARM_THUMB23)
+ {
+ /* This is pretty much a copy of what the default
+ _bfd_final_link_relocate and _bfd_relocate_contents
+ routines do to perform a relocation, with special
+ processing for the split addressing of the Thumb BL
+ instruction. Again, it would probably be simpler adding a
+ ThumbBRANCH23 specific macro expansion into the default
+ code. */
+
+ bfd_vma address = rel->r_vaddr - input_section->vma;
+
+ if (address > input_section->_raw_size)
+ rstat = bfd_reloc_outofrange;
+ else
+ {
+ bfd_vma relocation = val + addend;
+ int size = bfd_get_reloc_size (howto);
+ boolean overflow = false;
+ bfd_byte * location = contents + address;
+ bfd_vma x = bfd_get_32 (input_bfd, location);
+ bfd_vma src_mask = 0x007FFFFE;
+ bfd_signed_vma reloc_signed_max = (1 << (howto->bitsize - 1)) - 1;
+ bfd_signed_vma reloc_signed_min = ~reloc_signed_max;
+ bfd_vma check;
+ bfd_signed_vma signed_check;
+ bfd_vma add;
+ bfd_signed_vma signed_add;
+
+ BFD_ASSERT (size == 4);
+
+ /* howto->pc_relative should be TRUE for type 14 BRANCH23 */
+ relocation -= (input_section->output_section->vma
+ + input_section->output_offset);
+
+ /* howto->pcrel_offset should be TRUE for type 14 BRANCH23 */
+ relocation -= address;
+
+ /* No need to negate the relocation with BRANCH23. */
+ /* howto->complain_on_overflow == complain_overflow_signed for BRANCH23. */
+ /* howto->rightshift == 1 */
+ /* Drop unwanted bits from the value we are relocating to. */
+
+ check = relocation >> howto->rightshift;
+
+ /* If this is a signed value, the rightshift just dropped
+ leading 1 bits (assuming twos complement). */
+ if ((bfd_signed_vma) relocation >= 0)
+ signed_check = check;
+ else
+ signed_check = (check
+ | ((bfd_vma) - 1
+ & ~((bfd_vma) - 1 >> howto->rightshift)));
+
+ /* Get the value from the object file. */
+ if (bfd_big_endian (input_bfd))
+ {
+ add = (((x) & 0x07ff0000) >> 4) | (((x) & 0x7ff) << 1);
+ }
+ else
+ {
+ add = ((((x) & 0x7ff) << 12) | (((x) & 0x07ff0000) >> 15));
+ }
+
+ /* Get the value from the object file with an appropriate sign.
+ The expression involving howto->src_mask isolates the upper
+ bit of src_mask. If that bit is set in the value we are
+ adding, it is negative, and we subtract out that number times
+ two. If src_mask includes the highest possible bit, then we
+ can not get the upper bit, but that does not matter since
+ signed_add needs no adjustment to become negative in that
+ case. */
+
+ signed_add = add;
+
+ if ((add & (((~ src_mask) >> 1) & src_mask)) != 0)
+ signed_add -= (((~ src_mask) >> 1) & src_mask) << 1;
+
+ /* Add the value from the object file, shifted so that it is a
+ straight number. */
+ /* howto->bitpos == 0 */
+
+ signed_check += signed_add;
+ relocation += signed_add;
+
+ BFD_ASSERT (howto->complain_on_overflow == complain_overflow_signed);
+
+ /* Assumes two's complement. */
+ if ( signed_check > reloc_signed_max
+ || signed_check < reloc_signed_min)
+ overflow = true;
+
+ /* Put RELOCATION into the correct bits: */
+
+ if (bfd_big_endian (input_bfd))
+ {
+ relocation = (((relocation & 0xffe) >> 1) | ((relocation << 4) & 0x07ff0000));
+ }
+ else
+ {
+ relocation = (((relocation & 0xffe) << 15) | ((relocation >> 12) & 0x7ff));
+ }
+
+ /* Add RELOCATION to the correct bits of X: */
+ x = ((x & ~howto->dst_mask) | relocation);
+
+ /* Put the relocated value back in the object file: */
+ bfd_put_32 (input_bfd, x, location);
+
+ rstat = overflow ? bfd_reloc_overflow : bfd_reloc_ok;
+ }
+ }
+ else
+#endif /* THUMBEXTENSION */
+ rstat = _bfd_final_link_relocate (howto, input_bfd, input_section,
+ contents,
+ rel->r_vaddr - input_section->vma,
+ val, addend);
+#if 1 /* THUMBEXTENSION */
+ /* FIXME:
+ Is this the best way to fix up thumb addresses? krk@cygnus.com
+ Probably not, but it works, and if it works it don't need fixing! nickc@cygnus.com */
+ /* Only perform this fix during the final link, not a relocatable link. nickc@cygnus.com */
+ if (! info->relocateable
+ && rel->r_type == ARM_32)
+ {
+ /* Determine if we need to set the bottom bit of a relocated address
+ because the address is the address of a Thumb code symbol. */
+
+ int patchit = false;
+
+ if (h != NULL
+ && ( h->class == C_THUMBSTATFUNC
+ || h->class == C_THUMBEXTFUNC))
+ {
+ patchit = true;
+ }
+ else if (sym != NULL
+ && sym->n_scnum > N_UNDEF)
+ {
+ /* No hash entry - use the symbol instead. */
+
+ if ( sym->n_sclass == C_THUMBSTATFUNC
+ || sym->n_sclass == C_THUMBEXTFUNC)
+ patchit = true;
+ }
+
+ if (patchit)
+ {
+ bfd_byte * location = contents + rel->r_vaddr - input_section->vma;
+ bfd_vma x = bfd_get_32 (input_bfd, location);
+
+ bfd_put_32 (input_bfd, x | 1, location);
+ }
+ }
+#endif /* THUMBEXTENSION */
+
+ switch (rstat)
+ {
+ default:
+ abort ();
+ case bfd_reloc_ok:
+ break;
+ case bfd_reloc_outofrange:
+ (*_bfd_error_handler)
+ ("%s: bad reloc address 0x%lx in section `%s'",
+ bfd_get_filename (input_bfd),
+ (unsigned long) rel->r_vaddr,
+ bfd_get_section_name (input_bfd, input_section));
+ return false;
+ case bfd_reloc_overflow:
+ {
+ const char *name;
+ char buf[SYMNMLEN + 1];
+
+ if (symndx == -1)
+ name = "*ABS*";
+ else if (h != NULL)
+ name = h->root.root.string;
+ else
+ {
+ name = _bfd_coff_internal_syment_name (input_bfd, sym, buf);
+ if (name == NULL)
+ return false;
+ }
+
+ if (! ((*info->callbacks->reloc_overflow)
+ (info, name, howto->name, (bfd_vma) 0, input_bfd,
+ input_section, rel->r_vaddr - input_section->vma)))
+ return false;
+ }
+ }
+ }
+
+ return true;
+}
+
+boolean
+arm_allocate_interworking_sections (info)
+ struct bfd_link_info *info;
+{
+ asection *s;
+ bfd_byte *foo;
+ static char test_char = '1';
+
+ if ( global_arm_glue_size != 0 )
+ {
+ BFD_ASSERT (bfd_of_glue_owner != NULL);
+
+ s = bfd_get_section_by_name (bfd_of_glue_owner, ARM2THUMB_GLUE_SECTION_NAME);
+
+ BFD_ASSERT (s != NULL);
+
+ foo = (bfd_byte *) bfd_alloc(bfd_of_glue_owner, global_arm_glue_size);
+ memset(foo, test_char, global_arm_glue_size);
+
+ s->_raw_size = s->_cooked_size = global_arm_glue_size;
+ s->contents = foo;
+ }
+
+ if (global_thumb_glue_size != 0)
+ {
+ BFD_ASSERT (bfd_of_glue_owner != NULL);
+
+ s = bfd_get_section_by_name (bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME);
+
+ BFD_ASSERT (s != NULL);
+
+ foo = (bfd_byte *) bfd_alloc(bfd_of_glue_owner, global_thumb_glue_size);
+ memset(foo, test_char, global_thumb_glue_size);
+
+ s->_raw_size = s->_cooked_size = global_thumb_glue_size;
+ s->contents = foo;
+ }
+
+ return true;
+}
+
+static void
+record_arm_to_thumb_glue (info, h)
+ struct bfd_link_info * info;
+ struct coff_link_hash_entry * h;
+{
+ const char * name = h->root.root.string;
+ register asection * s;
+ char * tmp_name;
+ struct coff_link_hash_entry * myh;
+
+
+ BFD_ASSERT (bfd_of_glue_owner != NULL);
+
+ s = bfd_get_section_by_name (bfd_of_glue_owner,
+ ARM2THUMB_GLUE_SECTION_NAME);
+
+ BFD_ASSERT (s != NULL);
+
+ tmp_name = ((char *)
+ bfd_malloc (strlen (name) + strlen (ARM2THUMB_GLUE_ENTRY_NAME)));
+
+ BFD_ASSERT (tmp_name);
+
+ sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name);
+
+ myh = coff_link_hash_lookup (coff_hash_table (info),
+ tmp_name,
+ false, false, true);
+
+ if (myh != NULL)
+ {
+ free (tmp_name);
+ return; /* we've already seen this guy */
+ }
+
+
+ /* The only trick here is using global_arm_glue_size as the value. Even
+ though the section isn't allocated yet, this is where we will be putting
+ it. */
+
+ bfd_coff_link_add_one_symbol (info, bfd_of_glue_owner, tmp_name,
+ BSF_EXPORT | BSF_GLOBAL,
+ s, global_arm_glue_size + 1,
+ NULL, true, false,
+ (struct bfd_link_hash_entry **) & myh);
+
+ global_arm_glue_size += ARM2THUMB_GLUE_SIZE;
+
+ free (tmp_name);
+
+ return;
+}
+
+static void
+record_thumb_to_arm_glue (info, h)
+ struct bfd_link_info * info;
+ struct coff_link_hash_entry * h;
+{
+ const char * name = h->root.root.string;
+ register asection * s;
+ char * tmp_name;
+ struct coff_link_hash_entry * myh;
+
+
+ BFD_ASSERT (bfd_of_glue_owner != NULL);
+
+ s = bfd_get_section_by_name (bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME);
+
+ BFD_ASSERT (s != NULL);
+
+ tmp_name = (char *) bfd_malloc (strlen (name) + strlen (THUMB2ARM_GLUE_ENTRY_NAME));
+
+ BFD_ASSERT (tmp_name);
+
+ sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name);
+
+ myh = coff_link_hash_lookup (coff_hash_table (info),
+ tmp_name,
+ false, false, true);
+
+ if (myh != NULL)
+ {
+ free (tmp_name);
+ return; /* we've already seen this guy */
+ }
+
+ bfd_coff_link_add_one_symbol (info, bfd_of_glue_owner, tmp_name,
+ BSF_LOCAL, s, global_thumb_glue_size + 1,
+ NULL, true, false,
+ (struct bfd_link_hash_entry **) & myh);
+
+ /* if we mark it 'thumb', the disassembler will do a better job */
+ myh->class = C_THUMBEXTFUNC;
+
+ free (tmp_name);
+
+#define CHANGE_TO_ARM "__%s_change_to_arm"
+
+ tmp_name = ((char *)
+ bfd_malloc (strlen (name) + strlen (CHANGE_TO_ARM)));
+
+ BFD_ASSERT (tmp_name);
+
+ sprintf (tmp_name, CHANGE_TO_ARM, name);
+
+ myh = NULL;
+
+ /* now allocate another symbol to switch back to arm mode */
+ bfd_coff_link_add_one_symbol (info, bfd_of_glue_owner, tmp_name,
+ BSF_LOCAL, s, global_thumb_glue_size + 4,
+ NULL, true, false,
+ (struct bfd_link_hash_entry **) & myh);
+
+ free (tmp_name);
+
+ global_thumb_glue_size += THUMB2ARM_GLUE_SIZE;
+
+ return;
+}
+
+boolean
+arm_process_before_allocation (abfd, info)
+ bfd * abfd;
+ struct bfd_link_info * info;
+{
+ asection * sec;
+
+ /* If we are only performing a partial link do not bother
+ to construct any glue. */
+ if (info->relocateable)
+ return true;
+
+ /* Here we have a bfd that is to be included on the link. We have a hook
+ to do reloc rummaging, before section sizes are nailed down. */
+
+ _bfd_coff_get_external_symbols (abfd);
+
+ /* Rummage around all the relocs and map the glue vectors. */
+ sec = abfd->sections;
+
+ if (sec == NULL)
+ return true;
+
+ for (; sec != NULL; sec = sec->next)
+ {
+ struct internal_reloc * i;
+ struct internal_reloc * rel;
+
+ if (sec->reloc_count == 0)
+ continue;
+
+ /* Load the relocs. */
+ /* FIXME: there may be a storage leak here. */
+
+ i = _bfd_coff_read_internal_relocs (abfd, sec, 1, 0, 0, 0);
+
+ BFD_ASSERT (i != 0);
+
+ for (rel = i; rel < i + sec->reloc_count; ++rel)
+ {
+ unsigned short r_type = rel->r_type;
+ long symndx;
+ struct coff_link_hash_entry * h;
+
+ symndx = rel->r_symndx;
+
+ /* If the relocation is not against a symbol it cannot concern us. */
+ if (symndx == -1)
+ continue;
+
+ h = obj_coff_sym_hashes (abfd)[symndx];
+
+ /* If the relocation is against a static symbol it must be within
+ the current section and so canot be a cross ARM/Thumb relocation. */
+ if (h == NULL)
+ continue;
+
+ switch (r_type)
+ {
+ case ARM_26:
+ /* This one is a call from arm code. We need to look up
+ the target of the call. If it is a thumb target, we
+ insert glue. */
+
+ if (h->class == C_THUMBEXTFUNC)
+ {
+ record_arm_to_thumb_glue (info, h);
+ }
+ break;
+
+ case ARM_THUMB23:
+ /* This one is a call from thumb code. We used to look
+ for ARM_THUMB9 and ARM_THUMB12 as well. We need to look
+ up the target of the call. If it is an arm target, we
+ insert glue. */
+
+ switch (h->class)
+ {
+ case C_EXT:
+ case C_STAT:
+ case C_LABEL:
+ record_thumb_to_arm_glue (info, h);
+ break;
+ default:
+ ;
+ }
+ break;
+
+ default:
+ break;
+ }
+ }
+ }
+
+ return true;
+}
+
+#define coff_relocate_section coff_arm_relocate_section
+
+/* When doing a relocateable link, we want to convert ARM26 relocs
+ into ARM26D relocs. */
+
+static boolean
+coff_arm_adjust_symndx (obfd, info, ibfd, sec, irel, adjustedp)
+ bfd *obfd;
+ struct bfd_link_info *info;
+ bfd *ibfd;
+ asection *sec;
+ struct internal_reloc *irel;
+ boolean *adjustedp;
+{
+ if (irel->r_type == 3)
+ {
+ struct coff_link_hash_entry *h;
+
+ h = obj_coff_sym_hashes (ibfd)[irel->r_symndx];
+ if (h != NULL
+ && (h->root.type == bfd_link_hash_defined
+ || h->root.type == bfd_link_hash_defweak)
+ && h->root.u.def.section->output_section == sec->output_section)
+ irel->r_type = 7;
+ }
+ *adjustedp = false;
+ return true;
+}
+
+
+/* Called when merging the private data areas of two BFDs.
+ This is important as it allows us to detect if we are
+ attempting to merge binaries compiled for different ARM
+ targets, eg different CPUs or differents APCS's. */
+
+static boolean
+coff_arm_bfd_merge_private_bfd_data (ibfd, obfd)
+ bfd * ibfd;
+ bfd * obfd;
+{
+ BFD_ASSERT (ibfd != NULL && obfd != NULL);
+
+ if (ibfd == obfd)
+ return true;
+
+ /* If the two formats are different we cannot merge anything. */
+ if (ibfd->xvec != obfd->xvec)
+ {
+ bfd_set_error (bfd_error_wrong_format);
+ return false;
+ }
+
+ /* Verify that the APCS is the same for the two BFDs */
+ if (APCS_SET (ibfd))
+ {
+ if (APCS_SET (obfd))
+ {
+ /* If the src and dest have different APCS flag bits set, fail. */
+ if (APCS_26_FLAG (obfd) != APCS_26_FLAG (ibfd))
+ {
+ _bfd_error_handler
+ ("%s: ERROR: compiled for APCS-%d whereas target %s uses APCS-%d",
+ bfd_get_filename (ibfd), APCS_26_FLAG (ibfd) ? 26 : 32,
+ bfd_get_filename (obfd), APCS_26_FLAG (obfd) ? 26 : 32
+ );
+
+ bfd_set_error (bfd_error_wrong_format);
+ return false;
+ }
+
+ if (APCS_FLOAT_FLAG (obfd) != APCS_FLOAT_FLAG (ibfd))
+ {
+ _bfd_error_handler
+ ("%s: ERROR: passes floats in %s registers whereas target %s uses %s registers",
+ bfd_get_filename (ibfd), APCS_FLOAT_FLAG (ibfd) ? "float" : "integer",
+ bfd_get_filename (obfd), APCS_FLOAT_FLAG (obfd) ? "float" : "integer"
+ );
+
+ bfd_set_error (bfd_error_wrong_format);
+ return false;
+ }
+
+ if (PIC_FLAG (obfd) != PIC_FLAG (ibfd))
+ {
+ _bfd_error_handler
+ ("%s: ERROR: compiled as %s code, whereas target %s is %s",
+ bfd_get_filename (ibfd), PIC_FLAG (ibfd) ? "position independent" : "absoluste position",
+ bfd_get_filename (obfd), PIC_FLAG (obfd) ? "position independent" : "absoluste position"
+ );
+
+ bfd_set_error (bfd_error_wrong_format);
+ return false;
+ }
+ }
+ else
+ {
+ SET_APCS_FLAGS (obfd, APCS_26_FLAG (ibfd) | APCS_FLOAT_FLAG (ibfd) | PIC_FLAG (ibfd));
+
+ /* Set up the arch and fields as well as these are probably wrong. */
+ bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), bfd_get_mach (ibfd));
+ }
+ }
+
+ /* Check the interworking support. */
+ if (INTERWORK_SET (ibfd))
+ {
+ if (INTERWORK_SET (obfd))
+ {
+ /* If the src and dest differ in their interworking issue a warning. */
+ if (INTERWORK_FLAG (obfd) != INTERWORK_FLAG (ibfd))
+ {
+ _bfd_error_handler
+ ("Warning: input file %s %s interworking, whereas %s does%s",
+ bfd_get_filename (ibfd),
+ INTERWORK_FLAG (ibfd) ? "supports" : "does not support",
+ bfd_get_filename (obfd),
+ INTERWORK_FLAG (obfd) ? "." : " not."
+ );
+ }
+ }
+ else
+ {
+ SET_INTERWORK_FLAG (obfd, INTERWORK_FLAG (ibfd));
+ }
+ }
+
+ return true;
+}
+
+
+/* Display the flags field */
+
+static boolean
+coff_arm_bfd_print_private_bfd_data (abfd, ptr)
+ bfd * abfd;
+ PTR ptr;
+{
+ FILE * file = (FILE *) ptr;
+
+ BFD_ASSERT (abfd != NULL && ptr != NULL)
+
+ fprintf (file, "private flags = %x", coff_data( abfd )->flags);
+
+ if (APCS_SET (abfd))
+ fprintf (file, ": [APCS-%d] [floats passed in %s registers] [%s]",
+ APCS_26_FLAG (abfd) ? 26 : 32,
+ APCS_FLOAT_FLAG (abfd) ? "float" : "integer",
+ PIC_FLAG (abfd) ? "position independent" : "absolute position"
+ );
+
+ if (INTERWORK_SET (abfd))
+ fprintf (file, ": [interworking %ssupported]",
+ INTERWORK_FLAG (abfd) ? "" : "not " );
+
+ fputc ('\n', file);
+
+ return true;
+}
+
+
+/* Copies the given flags into the coff_tdata.flags field.
+ Typically these flags come from the f_flags[] field of
+ the COFF filehdr structure, which contains important,
+ target specific information. */
+
+static boolean
+coff_arm_bfd_set_private_flags (abfd, flags)
+ bfd * abfd;
+ flagword flags;
+{
+ int flag;
+
+ BFD_ASSERT (abfd != NULL);
+
+ flag = (flags & F_APCS26) ? F_APCS_26 : 0;
+
+ /* Make sure that the APCS field has not been initialised to the opposite value. */
+ if (APCS_SET (abfd)
+ && ( (APCS_26_FLAG (abfd) != flag)
+ || (APCS_FLOAT_FLAG (abfd) != (flags & F_APCS_FLOAT))
+ || (PIC_FLAG (abfd) != (flags & F_PIC))
+ ))
+ return false;
+
+ flag |= (flags & (F_APCS_FLOAT | F_PIC));
+
+ SET_APCS_FLAGS (abfd, flag);
+
+ flag = (flags & F_INTERWORK);
+
+ /* If either the flags or the BFD do support interworking then do not set the interworking flag. */
+ if (INTERWORK_SET (abfd) && (INTERWORK_FLAG (abfd) != flag))
+ flag = 0;
+
+ SET_INTERWORK_FLAG (abfd, flag);
+
+ return true;
+}
+
+
+/* Copy the important parts of the target specific data
+ from one instance of a BFD to another. */
+
+static boolean
+coff_arm_bfd_copy_private_bfd_data (src, dest)
+ bfd * src;
+ bfd * dest;
+{
+ BFD_ASSERT (src != NULL && dest != NULL);
+
+ if (src == dest)
+ return true;
+
+ /* If the destination is not in the same format as the source, do not do the copy. */
+ if (src->xvec != dest->xvec)
+ return true;
+
+ /* copy the flags field */
+ if (APCS_SET (src))
+ {
+ if (APCS_SET (dest))
+ {
+ /* If the src and dest have different APCS flag bits set, fail. */
+ if (APCS_26_FLAG (dest) != APCS_26_FLAG (src))
+ return false;
+
+ if (APCS_FLOAT_FLAG (dest) != APCS_FLOAT_FLAG (src))
+ return false;
+
+ if (PIC_FLAG (dest) != PIC_FLAG (src))
+ return false;
+ }
+ else
+ SET_APCS_FLAGS (dest, APCS_26_FLAG (src) | APCS_FLOAT_FLAG (src) | PIC_FLAG (src));
+ }
+
+ if (INTERWORK_SET (src))
+ {
+ if (INTERWORK_SET (dest))
+ {
+ /* If the src and dest have different interworking flags then turn off the interworking bit. */
+ if (INTERWORK_FLAG (dest) != INTERWORK_FLAG (src))
+ SET_INTERWORK_FLAG (dest, 0);
+ }
+ else
+ {
+ SET_INTERWORK_FLAG (dest, INTERWORK_FLAG (src));
+ }
+ }
+
+ return true;
+}
+
+/* Note: the definitions here of LOCAL_LABEL_PREFIX and USER_LABEL_PREIFX
+ *must* match the definitions on gcc/config/arm/semi.h. */
+#define LOCAL_LABEL_PREFIX "."
+#define USER_LABEL_PREFIX "_"
+
+static boolean
+coff_arm_is_local_label_name (abfd, name)
+ bfd * abfd;
+ const char * name;
+{
+#ifdef LOCAL_LABEL_PREFIX
+ /* If there is a prefix for local labels then look for this.
+ If the prefix exists, but it is empty, then ignore the test. */
+
+ if (LOCAL_LABEL_PREFIX[0] != 0)
+ {
+ if (strncmp (name, LOCAL_LABEL_PREFIX, strlen (LOCAL_LABEL_PREFIX)) == 0)
+ return true;
+ }
+#endif
+#ifdef USER_LABEL_PREFIX
+ if (USER_LABEL_PREFIX[0] != 0)
+ {
+ if (strncmp (name, USER_LABEL_PREFIX, strlen (USER_LABEL_PREFIX)) == 0)
+ return false;
+ }
+#endif
+
+ /* devo/gcc/config/dbxcoff.h defines ASM_OUTPUT_SOURCE_LINE to generate local line numbers as .LM<number>, so treat these as local. */
+
+ switch (name[0])
+ {
+ case 'L': return true;
+ case '.': return (name[1] == 'L' && name[2] == 'M') ? true : false;
+ default: return false; /* Cannot make our minds up - default to false so that it will not be stripped by accident. */
+ }
+}
+
+#define coff_bfd_is_local_label_name coff_arm_is_local_label_name
+#define coff_adjust_symndx coff_arm_adjust_symndx
+#define coff_bfd_final_link coff_arm_bfd_final_link
#define coff_bfd_merge_private_bfd_data coff_arm_bfd_merge_private_bfd_data
#define coff_bfd_print_private_bfd_data coff_arm_bfd_print_private_bfd_data
#define coff_bfd_set_private_flags coff_arm_bfd_set_private_flags
#include "coffcode.h"
+static boolean
+arm_do_last (abfd)
+ bfd * abfd;
+{
+ if (abfd == bfd_of_glue_owner)
+ return true;
+ else
+ return false;
+}
+
+static bfd *
+arm_get_last()
+{
+ return bfd_of_glue_owner;
+}
+
+/* This piece of machinery exists only to guarantee that the bfd that holds
+ the glue section is written last.
+
+ This does depend on bfd_make_section attaching a new section to the
+ end of the section list for the bfd.
+
+ This is otherwise intended to be functionally the same as
+ cofflink.c:_bfd_coff_final_link(). It is specifically different only
+ where the ARM_HACKS macro modifies the code. It is left in as a
+ precise form of comment. krk@cygnus.com */
+
+#define ARM_HACKS
+
+
+/* Do the final link step. */
+
+boolean
+coff_arm_bfd_final_link (abfd, info)
+ bfd *abfd;
+ struct bfd_link_info *info;
+{
+ bfd_size_type symesz;
+ struct coff_final_link_info finfo;
+ boolean debug_merge_allocated;
+ asection *o;
+ struct bfd_link_order *p;
+ size_t max_sym_count;
+ size_t max_lineno_count;
+ size_t max_reloc_count;
+ size_t max_output_reloc_count;
+ size_t max_contents_size;
+ file_ptr rel_filepos;
+ unsigned int relsz;
+ file_ptr line_filepos;
+ unsigned int linesz;
+ bfd *sub;
+ bfd_byte *external_relocs = NULL;
+ char strbuf[STRING_SIZE_SIZE];
+
+ symesz = bfd_coff_symesz (abfd);
+
+ finfo.info = info;
+ finfo.output_bfd = abfd;
+ finfo.strtab = NULL;
+ finfo.section_info = NULL;
+ finfo.last_file_index = -1;
+ finfo.last_bf_index = -1;
+ finfo.internal_syms = NULL;
+ finfo.sec_ptrs = NULL;
+ finfo.sym_indices = NULL;
+ finfo.outsyms = NULL;
+ finfo.linenos = NULL;
+ finfo.contents = NULL;
+ finfo.external_relocs = NULL;
+ finfo.internal_relocs = NULL;
+ debug_merge_allocated = false;
+
+ coff_data (abfd)->link_info = info;
+
+ finfo.strtab = _bfd_stringtab_init ();
+ if (finfo.strtab == NULL)
+ goto error_return;
+
+ if (! coff_debug_merge_hash_table_init (&finfo.debug_merge))
+ goto error_return;
+ debug_merge_allocated = true;
+
+ /* Compute the file positions for all the sections. */
+ if (! abfd->output_has_begun)
+ bfd_coff_compute_section_file_positions (abfd);
+
+ /* Count the line numbers and relocation entries required for the
+ output file. Set the file positions for the relocs. */
+ rel_filepos = obj_relocbase (abfd);
+ relsz = bfd_coff_relsz (abfd);
+ max_contents_size = 0;
+ max_lineno_count = 0;
+ max_reloc_count = 0;
+
+ for (o = abfd->sections; o != NULL; o = o->next)
+ {
+ o->reloc_count = 0;
+ o->lineno_count = 0;
+ for (p = o->link_order_head; p != NULL; p = p->next)
+ {
+
+ if (p->type == bfd_indirect_link_order)
+ {
+ asection *sec;
+
+ sec = p->u.indirect.section;
+
+ /* Mark all sections which are to be included in the
+ link. This will normally be every section. We need
+ to do this so that we can identify any sections which
+ the linker has decided to not include. */
+ sec->linker_mark = true;
+
+ if (info->strip == strip_none
+ || info->strip == strip_some)
+ o->lineno_count += sec->lineno_count;
+
+ if (info->relocateable)
+ o->reloc_count += sec->reloc_count;
+
+ if (sec->_raw_size > max_contents_size)
+ max_contents_size = sec->_raw_size;
+ if (sec->lineno_count > max_lineno_count)
+ max_lineno_count = sec->lineno_count;
+ if (sec->reloc_count > max_reloc_count)
+ max_reloc_count = sec->reloc_count;
+ }
+ else if (info->relocateable
+ && (p->type == bfd_section_reloc_link_order
+ || p->type == bfd_symbol_reloc_link_order))
+ ++o->reloc_count;
+ }
+ if (o->reloc_count == 0)
+ o->rel_filepos = 0;
+ else
+ {
+ o->flags |= SEC_RELOC;
+ o->rel_filepos = rel_filepos;
+ rel_filepos += o->reloc_count * relsz;
+ }
+ }
+
+ /* If doing a relocateable link, allocate space for the pointers we
+ need to keep. */
+ if (info->relocateable)
+ {
+ unsigned int i;
+
+ /* We use section_count + 1, rather than section_count, because
+ the target_index fields are 1 based. */
+ finfo.section_info =
+ ((struct coff_link_section_info *)
+ bfd_malloc ((abfd->section_count + 1)
+ * sizeof (struct coff_link_section_info)));
+ if (finfo.section_info == NULL)
+ goto error_return;
+ for (i = 0; i <= abfd->section_count; i++)
+ {
+ finfo.section_info[i].relocs = NULL;
+ finfo.section_info[i].rel_hashes = NULL;
+ }
+ }
+
+ /* We now know the size of the relocs, so we can determine the file
+ positions of the line numbers. */
+ line_filepos = rel_filepos;
+ linesz = bfd_coff_linesz (abfd);
+ max_output_reloc_count = 0;
+ for (o = abfd->sections; o != NULL; o = o->next)
+ {
+ if (o->lineno_count == 0)
+ o->line_filepos = 0;
+ else
+ {
+ o->line_filepos = line_filepos;
+ line_filepos += o->lineno_count * linesz;
+ }
+
+ if (o->reloc_count != 0)
+ {
+ /* We don't know the indices of global symbols until we have
+ written out all the local symbols. For each section in
+ the output file, we keep an array of pointers to hash
+ table entries. Each entry in the array corresponds to a
+ reloc. When we find a reloc against a global symbol, we
+ set the corresponding entry in this array so that we can
+ fix up the symbol index after we have written out all the
+ local symbols.
+
+ Because of this problem, we also keep the relocs in
+ memory until the end of the link. This wastes memory,
+ but only when doing a relocateable link, which is not the
+ common case. */
+ BFD_ASSERT (info->relocateable);
+ finfo.section_info[o->target_index].relocs =
+ ((struct internal_reloc *)
+ bfd_malloc (o->reloc_count * sizeof (struct internal_reloc)));
+ finfo.section_info[o->target_index].rel_hashes =
+ ((struct coff_link_hash_entry **)
+ bfd_malloc (o->reloc_count
+ * sizeof (struct coff_link_hash_entry *)));
+ if (finfo.section_info[o->target_index].relocs == NULL
+ || finfo.section_info[o->target_index].rel_hashes == NULL)
+ goto error_return;
+
+ if (o->reloc_count > max_output_reloc_count)
+ max_output_reloc_count = o->reloc_count;
+ }
+
+ /* Reset the reloc and lineno counts, so that we can use them to
+ count the number of entries we have output so far. */
+ o->reloc_count = 0;
+ o->lineno_count = 0;
+ }
+
+ obj_sym_filepos (abfd) = line_filepos;
+
+ /* Figure out the largest number of symbols in an input BFD. Take
+ the opportunity to clear the output_has_begun fields of all the
+ input BFD's. */
+ max_sym_count = 0;
+ for (sub = info->input_bfds; sub != NULL; sub = sub->link_next)
+ {
+ size_t sz;
+
+ sub->output_has_begun = false;
+ sz = obj_raw_syment_count (sub);
+ if (sz > max_sym_count)
+ max_sym_count = sz;
+ }
+
+ /* Allocate some buffers used while linking. */
+ finfo.internal_syms = ((struct internal_syment *)
+ bfd_malloc (max_sym_count
+ * sizeof (struct internal_syment)));
+ finfo.sec_ptrs = (asection **) bfd_malloc (max_sym_count
+ * sizeof (asection *));
+ finfo.sym_indices = (long *) bfd_malloc (max_sym_count * sizeof (long));
+ finfo.outsyms = ((bfd_byte *)
+ bfd_malloc ((size_t) ((max_sym_count + 1) * symesz)));
+ finfo.linenos = (bfd_byte *) bfd_malloc (max_lineno_count
+ * bfd_coff_linesz (abfd));
+ finfo.contents = (bfd_byte *) bfd_malloc (max_contents_size);
+ finfo.external_relocs = (bfd_byte *) bfd_malloc (max_reloc_count * relsz);
+ if (! info->relocateable)
+ finfo.internal_relocs = ((struct internal_reloc *)
+ bfd_malloc (max_reloc_count
+ * sizeof (struct internal_reloc)));
+ if ((finfo.internal_syms == NULL && max_sym_count > 0)
+ || (finfo.sec_ptrs == NULL && max_sym_count > 0)
+ || (finfo.sym_indices == NULL && max_sym_count > 0)
+ || finfo.outsyms == NULL
+ || (finfo.linenos == NULL && max_lineno_count > 0)
+ || (finfo.contents == NULL && max_contents_size > 0)
+ || (finfo.external_relocs == NULL && max_reloc_count > 0)
+ || (! info->relocateable
+ && finfo.internal_relocs == NULL
+ && max_reloc_count > 0))
+ goto error_return;
+
+ /* We now know the position of everything in the file, except that
+ we don't know the size of the symbol table and therefore we don't
+ know where the string table starts. We just build the string
+ table in memory as we go along. We process all the relocations
+ for a single input file at once. */
+ obj_raw_syment_count (abfd) = 0;
+
+ if (coff_backend_info (abfd)->_bfd_coff_start_final_link)
+ {
+ if (! bfd_coff_start_final_link (abfd, info))
+ goto error_return;
+ }
+
+ for (o = abfd->sections; o != NULL; o = o->next)
+ {
+ for (p = o->link_order_head; p != NULL; p = p->next)
+ {
+ if (p->type == bfd_indirect_link_order
+ && (bfd_get_flavour (p->u.indirect.section->owner)
+ == bfd_target_coff_flavour))
+ {
+ sub = p->u.indirect.section->owner;
+#ifdef ARM_HACKS
+ if (! sub->output_has_begun && !arm_do_last(sub))
+#else
+ if (! sub->output_has_begun)
+#endif
+ {
+ if (! _bfd_coff_link_input_bfd (&finfo, sub))
+ goto error_return;
+ sub->output_has_begun = true;
+ }
+ }
+ else if (p->type == bfd_section_reloc_link_order
+ || p->type == bfd_symbol_reloc_link_order)
+ {
+ if (! _bfd_coff_reloc_link_order (abfd, &finfo, o, p))
+ goto error_return;
+ }
+ else
+ {
+ if (! _bfd_default_link_order (abfd, info, o, p))
+ goto error_return;
+ }
+ }
+ }
+
+#ifdef ARM_HACKS
+ {
+ extern bfd* arm_get_last();
+ bfd* last_one = arm_get_last();
+ if (last_one)
+ {
+ if (! _bfd_coff_link_input_bfd (&finfo, last_one))
+ goto error_return;
+ }
+ last_one->output_has_begun = true;
+ }
+#endif
+
+ /* Free up the buffers used by _bfd_coff_link_input_bfd. */
+
+ coff_debug_merge_hash_table_free (&finfo.debug_merge);
+ debug_merge_allocated = false;
+
+ if (finfo.internal_syms != NULL)
+ {
+ free (finfo.internal_syms);
+ finfo.internal_syms = NULL;
+ }
+ if (finfo.sec_ptrs != NULL)
+ {
+ free (finfo.sec_ptrs);
+ finfo.sec_ptrs = NULL;
+ }
+ if (finfo.sym_indices != NULL)
+ {
+ free (finfo.sym_indices);
+ finfo.sym_indices = NULL;
+ }
+ if (finfo.linenos != NULL)
+ {
+ free (finfo.linenos);
+ finfo.linenos = NULL;
+ }
+ if (finfo.contents != NULL)
+ {
+ free (finfo.contents);
+ finfo.contents = NULL;
+ }
+ if (finfo.external_relocs != NULL)
+ {
+ free (finfo.external_relocs);
+ finfo.external_relocs = NULL;
+ }
+ if (finfo.internal_relocs != NULL)
+ {
+ free (finfo.internal_relocs);
+ finfo.internal_relocs = NULL;
+ }
+
+ /* The value of the last C_FILE symbol is supposed to be the symbol
+ index of the first external symbol. Write it out again if
+ necessary. */
+ if (finfo.last_file_index != -1
+ && (unsigned int) finfo.last_file.n_value != obj_raw_syment_count (abfd))
+ {
+ finfo.last_file.n_value = obj_raw_syment_count (abfd);
+ bfd_coff_swap_sym_out (abfd, (PTR) &finfo.last_file,
+ (PTR) finfo.outsyms);
+ if (bfd_seek (abfd,
+ (obj_sym_filepos (abfd)
+ + finfo.last_file_index * symesz),
+ SEEK_SET) != 0
+ || bfd_write (finfo.outsyms, symesz, 1, abfd) != symesz)
+ return false;
+ }
+
+ /* Write out the global symbols. */
+ finfo.failed = false;
+ coff_link_hash_traverse (coff_hash_table (info), _bfd_coff_write_global_sym,
+ (PTR) &finfo);
+ if (finfo.failed)
+ goto error_return;
+
+ /* The outsyms buffer is used by _bfd_coff_write_global_sym. */
+ if (finfo.outsyms != NULL)
+ {
+ free (finfo.outsyms);
+ finfo.outsyms = NULL;
+ }
+
+ if (info->relocateable)
+ {
+ /* Now that we have written out all the global symbols, we know
+ the symbol indices to use for relocs against them, and we can
+ finally write out the relocs. */
+ external_relocs = ((bfd_byte *)
+ bfd_malloc (max_output_reloc_count * relsz));
+ if (external_relocs == NULL)
+ goto error_return;
+
+ for (o = abfd->sections; o != NULL; o = o->next)
+ {
+ struct internal_reloc *irel;
+ struct internal_reloc *irelend;
+ struct coff_link_hash_entry **rel_hash;
+ bfd_byte *erel;
+
+ if (o->reloc_count == 0)
+ continue;
+
+ irel = finfo.section_info[o->target_index].relocs;
+ irelend = irel + o->reloc_count;
+ rel_hash = finfo.section_info[o->target_index].rel_hashes;
+ erel = external_relocs;
+ for (; irel < irelend; irel++, rel_hash++, erel += relsz)
+ {
+ if (*rel_hash != NULL)
+ {
+ BFD_ASSERT ((*rel_hash)->indx >= 0);
+ irel->r_symndx = (*rel_hash)->indx;
+ }
+ bfd_coff_swap_reloc_out (abfd, (PTR) irel, (PTR) erel);
+ }
+
+ if (bfd_seek (abfd, o->rel_filepos, SEEK_SET) != 0
+ || bfd_write ((PTR) external_relocs, relsz, o->reloc_count,
+ abfd) != relsz * o->reloc_count)
+ goto error_return;
+ }
+
+ free (external_relocs);
+ external_relocs = NULL;
+ }
+
+ /* Free up the section information. */
+ if (finfo.section_info != NULL)
+ {
+ unsigned int i;
+
+ for (i = 0; i < abfd->section_count; i++)
+ {
+ if (finfo.section_info[i].relocs != NULL)
+ free (finfo.section_info[i].relocs);
+ if (finfo.section_info[i].rel_hashes != NULL)
+ free (finfo.section_info[i].rel_hashes);
+ }
+ free (finfo.section_info);
+ finfo.section_info = NULL;
+ }
+
+ /* If we have optimized stabs strings, output them. */
+ if (coff_hash_table (info)->stab_info != NULL)
+ {
+ if (! _bfd_write_stab_strings (abfd, &coff_hash_table (info)->stab_info))
+ return false;
+ }
+
+ /* Write out the string table. */
+ if (obj_raw_syment_count (abfd) != 0)
+ {
+ if (bfd_seek (abfd,
+ (obj_sym_filepos (abfd)
+ + obj_raw_syment_count (abfd) * symesz),
+ SEEK_SET) != 0)
+ return false;
+
+#if STRING_SIZE_SIZE == 4
+ bfd_h_put_32 (abfd,
+ _bfd_stringtab_size (finfo.strtab) + STRING_SIZE_SIZE,
+ (bfd_byte *) strbuf);
+#else
+ #error Change bfd_h_put_32
+#endif
+
+ if (bfd_write (strbuf, 1, STRING_SIZE_SIZE, abfd) != STRING_SIZE_SIZE)
+ return false;
+
+ if (! _bfd_stringtab_emit (abfd, finfo.strtab))
+ return false;
+ }
+
+ _bfd_stringtab_free (finfo.strtab);
+
+ /* Setting bfd_get_symcount to 0 will cause write_object_contents to
+ not try to write out the symbols. */
+ bfd_get_symcount (abfd) = 0;
+
+ return true;
+
+ error_return:
+ if (debug_merge_allocated)
+ coff_debug_merge_hash_table_free (&finfo.debug_merge);
+ if (finfo.strtab != NULL)
+ _bfd_stringtab_free (finfo.strtab);
+ if (finfo.section_info != NULL)
+ {
+ unsigned int i;
+
+ for (i = 0; i < abfd->section_count; i++)
+ {
+ if (finfo.section_info[i].relocs != NULL)
+ free (finfo.section_info[i].relocs);
+ if (finfo.section_info[i].rel_hashes != NULL)
+ free (finfo.section_info[i].rel_hashes);
+ }
+ free (finfo.section_info);
+ }
+ if (finfo.internal_syms != NULL)
+ free (finfo.internal_syms);
+ if (finfo.sec_ptrs != NULL)
+ free (finfo.sec_ptrs);
+ if (finfo.sym_indices != NULL)
+ free (finfo.sym_indices);
+ if (finfo.outsyms != NULL)
+ free (finfo.outsyms);
+ if (finfo.linenos != NULL)
+ free (finfo.linenos);
+ if (finfo.contents != NULL)
+ free (finfo.contents);
+ if (finfo.external_relocs != NULL)
+ free (finfo.external_relocs);
+ if (finfo.internal_relocs != NULL)
+ free (finfo.internal_relocs);
+ if (external_relocs != NULL)
+ free (external_relocs);
+ return false;
+}
+
+static void
+arm_bfd_coff_swap_sym_in (abfd, ext1, in1)
+ bfd *abfd;
+ PTR ext1;
+ PTR in1;
+{
+ SYMENT *ext = (SYMENT *)ext1;
+ struct internal_syment *in = (struct internal_syment *)in1;
+ flagword flags;
+ register asection *s;
+
+ if( ext->e.e_name[0] == 0) {
+ in->_n._n_n._n_zeroes = 0;
+ in->_n._n_n._n_offset = bfd_h_get_32(abfd, (bfd_byte *) ext->e.e.e_offset);
+ }
+ else {
+#if SYMNMLEN != E_SYMNMLEN
+ -> Error, we need to cope with truncating or extending SYMNMLEN!;
+#else
+ memcpy(in->_n._n_name, ext->e.e_name, SYMNMLEN);
+#endif
+ }
+ in->n_value = bfd_h_get_32(abfd, (bfd_byte *) ext->e_value);
+ in->n_scnum = bfd_h_get_16(abfd, (bfd_byte *) ext->e_scnum);
+ if (sizeof(ext->e_type) == 2){
+ in->n_type = bfd_h_get_16(abfd, (bfd_byte *) ext->e_type);
+ }
+ else {
+ in->n_type = bfd_h_get_32(abfd, (bfd_byte *) ext->e_type);
+ }
+ in->n_sclass = bfd_h_get_8(abfd, ext->e_sclass);
+ in->n_numaux = bfd_h_get_8(abfd, ext->e_numaux);
+
+ if (bfd_of_glue_owner != 0) /* we already have a toc, so go home */
+ return;
+
+ /* save the bfd for later allocation */
+ bfd_of_glue_owner = abfd;
+
+ s = bfd_get_section_by_name (bfd_of_glue_owner ,
+ ARM2THUMB_GLUE_SECTION_NAME);
+
+ if (s == NULL)
+ {
+ flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY ;
+
+ s = bfd_make_section (bfd_of_glue_owner , ARM2THUMB_GLUE_SECTION_NAME);
+
+ if (s == NULL
+ || !bfd_set_section_flags (bfd_of_glue_owner, s, flags)
+ || !bfd_set_section_alignment (bfd_of_glue_owner, s, 2))
+ {
+ /* FIXME: set appropriate bfd error */
+ abort();
+ }
+ }
+
+ s = bfd_get_section_by_name ( bfd_of_glue_owner , THUMB2ARM_GLUE_SECTION_NAME);
+
+ if (s == NULL)
+ {
+ flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY ;
+
+ s = bfd_make_section (bfd_of_glue_owner , THUMB2ARM_GLUE_SECTION_NAME);
+
+ if (s == NULL
+ || !bfd_set_section_flags (bfd_of_glue_owner, s, flags)
+ || !bfd_set_section_alignment (bfd_of_glue_owner, s, 2))
+ {
+ /* FIXME: set appropriate bfd error krk@cygnus.com */
+ abort();
+ }
+ }
+
+ return;
+}
+
+static bfd_coff_backend_data arm_bfd_coff_std_swap_table =
+{
+ coff_swap_aux_in, arm_bfd_coff_swap_sym_in, coff_swap_lineno_in,
+ coff_swap_aux_out, coff_swap_sym_out,
+ coff_swap_lineno_out, coff_swap_reloc_out,
+ coff_swap_filehdr_out, coff_swap_aouthdr_out,
+ coff_swap_scnhdr_out,
+ FILHSZ, AOUTSZ, SCNHSZ, SYMESZ, AUXESZ, RELSZ, LINESZ,
+#ifdef COFF_LONG_FILENAMES
+ true,
+#else
+ false,
+#endif
+#ifdef COFF_LONG_SECTION_NAMES
+ true,
+#else
+ false,
+#endif
+ COFF_DEFAULT_SECTION_ALIGNMENT_POWER,
+ coff_swap_filehdr_in, coff_swap_aouthdr_in, coff_swap_scnhdr_in,
+ coff_swap_reloc_in, coff_bad_format_hook, coff_set_arch_mach_hook,
+ coff_mkobject_hook, styp_to_sec_flags, coff_set_alignment_hook,
+ coff_slurp_symbol_table, symname_in_debug_hook, coff_pointerize_aux_hook,
+ coff_print_aux, coff_reloc16_extra_cases, coff_reloc16_estimate,
+ coff_sym_is_global, coff_compute_section_file_positions,
+ coff_start_final_link, coff_relocate_section, coff_rtype_to_howto,
+ coff_adjust_symndx, coff_link_add_one_symbol
+};
+
const bfd_target
#ifdef TARGET_LITTLE_SYM
TARGET_LITTLE_SYM =
BFD_JUMP_TABLE_LINK (coff),
BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
- COFF_SWAP_TABLE,
+ & arm_bfd_coff_std_swap_table,
};
const bfd_target
BFD_JUMP_TABLE_LINK (coff),
BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
- COFF_SWAP_TABLE,
+ & arm_bfd_coff_std_swap_table,
};
projects / deliverable / binutils-gdb.git / commitdiff
