#define SET_INTERWORK_FLAG( abfd, flg ) (coff_data (abfd)->flags = \
(coff_data (abfd)->flags & ~ F_INTERWORK) \
| (flg | F_INTERWORK_SET))
+
+typedef enum {bunknown, b9, b12, b23} thumb_pcrel_branchtype;
+/* some typedefs for holding instructions */
+typedef unsigned long int insn32;
+typedef unsigned short int insn16;
+ /* Forward declarations for stupid compilers. */
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 **));
-
-static bfd_reloc_status_type
-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 boolean
-coff_arm_adjust_symndx PARAMS ((bfd *, struct bfd_link_info *, bfd *,
- asection *, struct internal_reloc *,
- boolean *));
+static bfd_reloc_status_type aoutarm_fix_pcrel_26_done
+ PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
+static bfd_reloc_status_type 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 boolean coff_arm_adjust_symndx
+ PARAMS ((bfd *, struct bfd_link_info *, bfd *,
+ asection *, struct internal_reloc *, boolean *));
+static reloc_howto_type * coff_arm_rtype_to_howto
+ PARAMS ((bfd *, asection *, struct internal_reloc *,
+ struct coff_link_hash_entry *, struct internal_syment *, bfd_vma *));
+static bfd_reloc_status_type coff_thumb_pcrel_common
+ PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **,
+ thumb_pcrel_branchtype));
+static CONST struct reloc_howto_struct * coff_arm_reloc_type_lookup
+ PARAMS ((bfd *, bfd_reloc_code_real_type));
+static struct bfd_link_hash_table * coff_arm_link_hash_table_create
+ PARAMS ((bfd *));
+static insn32 insert_thumb_branch
+ PARAMS ((insn32, int));
+static struct coff_link_hash_entry * find_thumb_glue
+ PARAMS ((struct bfd_link_info *, CONST char *, bfd *));
+static struct coff_link_hash_entry * find_arm_glue
+ PARAMS ((struct bfd_link_info *, CONST char *, bfd *));
+static void record_arm_to_thumb_glue
+ PARAMS ((struct bfd_link_info *, struct coff_link_hash_entry *));
+static void record_thumb_to_arm_glue
+ PARAMS ((struct bfd_link_info *, struct coff_link_hash_entry *));
+static boolean coff_arm_merge_private_bfd_data
+ PARAMS ((bfd *, bfd *));
+static boolean coff_arm_print_private_bfd_data
+ PARAMS ((bfd *, PTR));
+static boolean _bfd_coff_arm_set_private_flags
+ PARAMS ((bfd *, flagword));
+static boolean coff_arm_copy_private_bfd_data
+ PARAMS ((bfd *, bfd *));
+static boolean coff_arm_is_local_label_name
+ PARAMS ((bfd *, const char *));
+static boolean coff_arm_link_output_has_begun
+ PARAMS ((bfd *, struct coff_final_link_info *));
+static boolean coff_arm_final_link_postscript
+ PARAMS ((bfd *, struct coff_final_link_info *));
/* The linker script knows the section names for placement.
The entry_names are used to do simple name mangling on the stubs.
24,
false,
0,
- complain_overflow_signed,
+ complain_overflow_dont,
aoutarm_fix_pcrel_26_done,
"ARM_26D",
true,
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)
/* An arbitary input BFD chosen to hold the glue sections. */
bfd * bfd_of_glue_owner;
+
+ /* Support interworking with old, non-interworking aware ARM code. */
+ int support_old_code;
};
/* Get the ARM coff linker hash table from a link_info structure. */
return & ret->root.root;
}
-/* 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
static struct coff_link_hash_entry *
find_thumb_glue (info, name, input_bfd)
struct bfd_link_info * info;
- char * name;
+ CONST char * name;
bfd * input_bfd;
{
char * tmp_name;
struct coff_link_hash_entry * myh;
tmp_name = ((char *)
- bfd_malloc (strlen (name) + strlen (THUMB2ARM_GLUE_ENTRY_NAME)));
+ bfd_malloc (strlen (name) + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1));
BFD_ASSERT (tmp_name);
(coff_hash_table (info), tmp_name, false, false, true);
if (myh == NULL)
+ /* xgettext:c-format */
_bfd_error_handler (_("%s: unable to find THUMB glue '%s' for `%s'"),
bfd_get_filename (input_bfd), tmp_name, name);
static struct coff_link_hash_entry *
find_arm_glue (info, name, input_bfd)
struct bfd_link_info * info;
- char * name;
+ CONST char * name;
bfd * input_bfd;
{
char * tmp_name;
struct coff_link_hash_entry * myh;
tmp_name = ((char *)
- bfd_malloc (strlen (name) + strlen (ARM2THUMB_GLUE_ENTRY_NAME)));
+ bfd_malloc (strlen (name) + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1));
BFD_ASSERT (tmp_name);
(coff_hash_table (info), tmp_name, false, false, true);
if (myh == NULL)
+ /* xgettext:c-format */
_bfd_error_handler (_("%s: unable to find ARM glue '%s' for `%s'"),
bfd_get_filename (input_bfd), tmp_name, name);
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 const insn32
- a2t1_ldr_insn = 0xe59fc000,
- a2t2_bx_r12_insn = 0xe12fff1c,
- a2t3_func_addr_insn = 0x00000001;
+static const insn32 a2t1_ldr_insn = 0xe59fc000;
+static const insn32 a2t2_bx_r12_insn = 0xe12fff1c;
+static const insn32 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
-
+ Thumb->ARM: Thumb->(non-interworking aware) ARM
+
+ .thumb .thumb
+ .align 2 .align 2
+ __func_from_thumb: __func_from_thumb:
+ bx pc push {r6, lr}
+ nop ldr r6, __func_addr
+ .arm mov lr, pc
+ __func_change_to_arm: bx r6
+ b func .arm
+ __func_back_to_thumb:
+ ldmia r13! {r6, lr}
+ bx lr
+ __func_addr:
+ .word func
*/
-#define THUMB2ARM_GLUE_SIZE 8
-static const insn16
- t2a1_bx_pc_insn = 0x4778,
- t2a2_noop_insn = 0x46c0;
-static const insn32
- t2a3_b_insn = 0xea000000;
+#define THUMB2ARM_GLUE_SIZE (globals->support_old_code ? 20 : 8)
+static const insn16 t2a1_bx_pc_insn = 0x4778;
+static const insn16 t2a2_noop_insn = 0x46c0;
+static const insn32 t2a3_b_insn = 0xea000000;
+
+static const insn16 t2a1_push_insn = 0xb540;
+static const insn16 t2a2_ldr_insn = 0x4e03;
+static const insn16 t2a3_mov_insn = 0x46fe;
+static const insn16 t2a4_bx_insn = 0x4730;
+static const insn32 t2a5_pop_insn = 0xe8bd4040;
+static const insn32 t2a6_bx_insn = 0xe12fff1e;
/* TODO:
We should really create new local (static) symbols in destination
for (; rel < relend; rel++)
{
- 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;
+ 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;
&& ! INTERWORK_FLAG (h_sec->owner))
{
_bfd_error_handler
+ /* xgettext:c-format */
(_("%s(%s): warning: interworking not enabled."),
bfd_get_filename (h_sec->owner), name);
_bfd_error_handler
+ /* xgettext:c-format */
(_(" first occurrence: %s: arm call to thumb"),
bfd_get_filename (input_bfd));
}
{
if (h_sec->owner != NULL
&& INTERWORK_SET (h_sec->owner)
- && ! INTERWORK_FLAG (h_sec->owner))
+ && ! INTERWORK_FLAG (h_sec->owner)
+ && ! globals->support_old_code)
{
_bfd_error_handler
+ /* xgettext:c-format */
(_("%s(%s): warning: interworking not enabled."),
bfd_get_filename (h_sec->owner), name);
_bfd_error_handler
+ /* xgettext:c-format */
(_(" first occurrence: %s: thumb call to arm"),
bfd_get_filename (input_bfd));
+ _bfd_error_handler
+ (_(" consider relinking with --support-old-code enabled"));
}
-- my_offset;
myh->root.u.def.value = my_offset;
- bfd_put_16 (output_bfd, t2a1_bx_pc_insn,
- s->contents + my_offset);
+ if (globals->support_old_code)
+ {
+ bfd_put_16 (output_bfd, t2a1_push_insn,
+ s->contents + my_offset);
+
+ bfd_put_16 (output_bfd, t2a2_ldr_insn,
+ s->contents + my_offset + 2);
+
+ bfd_put_16 (output_bfd, t2a3_mov_insn,
+ s->contents + my_offset + 4);
+
+ bfd_put_16 (output_bfd, t2a4_bx_insn,
+ s->contents + my_offset + 6);
+
+ bfd_put_32 (output_bfd, t2a5_pop_insn,
+ s->contents + my_offset + 8);
+
+ bfd_put_32 (output_bfd, t2a6_bx_insn,
+ s->contents + my_offset + 12);
+
+ /* Store the address of the function in the last word of the stub. */
+ bfd_put_32 (output_bfd, h_val,
+ s->contents + my_offset + 16);
+ }
+ else
+ {
+ 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);
+ bfd_put_16 (output_bfd, t2a2_noop_insn,
+ s->contents + my_offset + 2);
- ret_offset =
- ((signed)h_val) - /* Address of destination of the stub */
- ((signed)(s->output_offset /* Offset from the start of the current section to the start of the stubs. */
- + my_offset /* Offset of the start of this stub from the start of the stubs. */
- + s->output_section->vma) /* Address of the start of the current section. */
- + 4 /* The branch instruction is 4 bytes into the stub. */
- + 8); /* ARM branches work from the pc of the instruction + 8. */
-
- bfd_put_32 (output_bfd,
- t2a3_b_insn | ((ret_offset >> 2) & 0x00FFFFFF),
- s->contents + my_offset + 4);
+ ret_offset =
+ ((bfd_signed_vma) h_val) /* Address of destination of the stub */
+ - ((bfd_signed_vma)
+ (s->output_offset /* Offset from the start of the current section to the start of the stubs. */
+ + my_offset /* Offset of the start of this stub from the start of the stubs. */
+ + s->output_section->vma) /* Address of the start of the current section. */
+ + 4 /* The branch instruction is 4 bytes into the stub. */
+ + 8); /* ARM branches work from the pc of the instruction + 8. */
+
+ bfd_put_32 (output_bfd,
+ t2a3_b_insn | ((ret_offset >> 2) & 0x00FFFFFF),
+ s->contents + my_offset + 4);
+ }
}
BFD_ASSERT (my_offset <= globals->thumb_glue_size);
BFD_ASSERT (s != NULL);
tmp_name = ((char *)
- bfd_malloc (strlen (name) + strlen (ARM2THUMB_GLUE_ENTRY_NAME)));
+ bfd_malloc (strlen (name) + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1));
BFD_ASSERT (tmp_name);
it. */
bfd_coff_link_add_one_symbol (info, globals->bfd_of_glue_owner, tmp_name,
- BSF_EXPORT | BSF_GLOBAL,
+ BSF_GLOBAL,
s, globals->arm_glue_size + 1,
NULL, true, false,
(struct bfd_link_hash_entry **) & myh);
- globals->arm_glue_size += ARM2THUMB_GLUE_SIZE;
-
free (tmp_name);
+
+ globals->arm_glue_size += ARM2THUMB_GLUE_SIZE;
return;
}
BFD_ASSERT (s != NULL);
- tmp_name = (char *) bfd_malloc (strlen (name) + strlen (THUMB2ARM_GLUE_ENTRY_NAME));
+ tmp_name = (char *) bfd_malloc (strlen (name) + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1);
BFD_ASSERT (tmp_name);
}
bfd_coff_link_add_one_symbol (info, globals->bfd_of_glue_owner, tmp_name,
- BSF_LOCAL, s, globals->thumb_glue_size + 1,
+ BSF_GLOBAL, s, globals->thumb_glue_size + 1,
NULL, true, false,
(struct bfd_link_hash_entry **) & myh);
free (tmp_name);
+ /* Allocate another symbol to mark where we switch to arm mode. */
+
#define CHANGE_TO_ARM "__%s_change_to_arm"
+#define BACK_FROM_ARM "__%s_back_from_arm"
+
+ tmp_name = (char *) bfd_malloc (strlen (name) + strlen (CHANGE_TO_ARM) + 1);
- tmp_name = ((char *)
- bfd_malloc (strlen (name) + strlen (CHANGE_TO_ARM)));
-
BFD_ASSERT (tmp_name);
-
- sprintf (tmp_name, CHANGE_TO_ARM, name);
+
+ sprintf (tmp_name, globals->support_old_code ? BACK_FROM_ARM : CHANGE_TO_ARM, name);
myh = NULL;
-
- /* Now allocate another symbol to switch back to arm mode. */
+
bfd_coff_link_add_one_symbol (info, globals->bfd_of_glue_owner, tmp_name,
- BSF_LOCAL, s, globals->thumb_glue_size + 4,
+ BSF_LOCAL, s, globals->thumb_glue_size
+ + (globals->support_old_code ? 8 : 4),
NULL, true, false,
(struct bfd_link_hash_entry **) & myh);
free (tmp_name);
-
+
globals->thumb_glue_size += THUMB2ARM_GLUE_SIZE;
return;
}
boolean
-bfd_arm_process_before_allocation (abfd, info)
+bfd_arm_process_before_allocation (abfd, info, support_old_code)
bfd * abfd;
struct bfd_link_info * info;
+ int support_old_code;
{
asection * sec;
struct coff_arm_link_hash_table * globals;
BFD_ASSERT (globals != NULL);
BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
+
+ globals->support_old_code = support_old_code;
/* Rummage around all the relocs and map the glue vectors. */
sec = abfd->sections;
return true;
}
+
#endif /* ! COFF_WITH_PE */
#define coff_bfd_reloc_type_lookup coff_arm_reloc_type_lookup
if (APCS_26_FLAG (obfd) != APCS_26_FLAG (ibfd))
{
_bfd_error_handler
+ /* xgettext: c-format */
(_("%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
const char *msg;
if (APCS_FLOAT_FLAG (ibfd))
+ /* xgettext: c-format */
msg = _("%s: ERROR: passes floats in float registers whereas target %s uses integer registers");
else
+ /* xgettext: c-format */
msg = _("%s: ERROR: passes floats in integer registers whereas target %s uses float registers");
+
_bfd_error_handler (msg, bfd_get_filename (ibfd),
bfd_get_filename (obfd));
if (PIC_FLAG (obfd) != PIC_FLAG (ibfd))
{
- const char *msg;
+ const char * msg;
if (PIC_FLAG (ibfd))
+ /* xgettext: c-format */
msg = _("%s: ERROR: compiled as position independent code, whereas target %s is absolute position");
else
+ /* xgettext: c-format */
msg = _("%s: ERROR: compiled as absolute position code, whereas target %s is position independent");
_bfd_error_handler (msg, bfd_get_filename (ibfd),
bfd_get_filename (obfd));
/* If the src and dest differ in their interworking issue a warning. */
if (INTERWORK_FLAG (obfd) != INTERWORK_FLAG (ibfd))
{
- const char *msg;
+ const char * msg;
if (INTERWORK_FLAG (ibfd))
- msg = _("Warning: input file %s supports internetworking, whereas %s does not.");
+ /* xgettext: c-format */
+ msg = _("Warning: input file %s supports interworking, whereas %s does not.");
else
- msg = _("Warning: input file %s does not support internetworking, whereas %s does.");
+ /* xgettext: c-format */
+ msg = _("Warning: input file %s does not support interworking, whereas %s does.");
+
_bfd_error_handler (msg, bfd_get_filename (ibfd),
bfd_get_filename (obfd));
}
flag = (flags & F_INTERWORK);
- /* If either the flags or the BFD do support interworking then do not
- set the interworking flag. */
+ /* If the BFD has already had its interworking flag set, but it
+ is different from the value that we have been asked to set,
+ then assume that that merged code will not support interworking
+ and set the flag accordingly. */
if (INTERWORK_SET (abfd) && (INTERWORK_FLAG (abfd) != flag))
- flag = 0;
+ {
+ if (flag)
+ /* xgettext: c-format */
+ _bfd_error_handler (_("Warning: Not setting interworking flag of %s, since it has already been specified as non-interworking"),
+ bfd_get_filename (abfd));
+ else
+ /* xgettext: c-format */
+ _bfd_error_handler (_("Warning: Clearing the interworking flag of %s due to outside request"),
+ bfd_get_filename (abfd));
+ flag = 0;
+ }
SET_INTERWORK_FLAG (abfd, flag);
/* 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);
+ {
+ if (INTERWORK_FLAG (dest))
+ {
+ /* xgettext:c-format */
+ _bfd_error_handler (("Warning: Clearing the interworking bit of %s, because the non-interworking code in %s has been copied into it"),
+ bfd_get_filename (dest),
+ bfd_get_filename (src));
+ }
+
+ SET_INTERWORK_FLAG (dest, 0);
+ }
}
else
{
projects / binutils-gdb.git / commitdiff