Enhance the disassembler so that it will reliably determine whether a reloc applies to the middle of the next insn.

PR 24907
binutils* objdump.c (null_print): New function.
	(disassemble_bytes): Delete previous_octets local and replace with
	a test of the max_reloc_offset_into_insn field of the
	bfd_arch_info structure.  If a reloc is a potential match for the
	next insn, then perform a dummy disassembly in order to calculate
	its real length.

bfd	* archures.c (bfd_arch_info_type): Add max_reloc_offset_into_insn
	field.
	(bfd_default_arch_struct): Initialise the new field.
	* bfd-in2.h: Regenerate.
	* cpu-aarch64.c: Initialise the new field.
	* cpu-alpha.c: Likewise.
	* cpu-arc.c: Likewise.
	* cpu-arm.c: Likewise.
	* cpu-avr.c: Likewise.
	* cpu-bfin.c: Likewise.
	* cpu-bpf.c: Likewise.
	* cpu-cr16.c: Likewise.
	* cpu-cr16c.c: Likewise.
	* cpu-cris.c: Likewise.
	* cpu-crx.c: Likewise.
	* cpu-csky.c: Likewise.
	* cpu-d10v.c: Likewise.
	* cpu-d30v.c: Likewise.
	* cpu-dlx.c: Likewise.
	* cpu-epiphany.c: Likewise.
	* cpu-fr30.c: Likewise.
	* cpu-frv.c: Likewise.
	* cpu-ft32.c: Likewise.
	* cpu-h8300.c: Likewise.
	* cpu-hppa.c: Likewise.
	* cpu-i386.c: Likewise.
	* cpu-ia64.c: Likewise.
	* cpu-iamcu.c: Likewise.
	* cpu-ip2k.c: Likewise.
	* cpu-iq2000.c: Likewise.
	* cpu-k1om.c: Likewise.
	* cpu-l1om.c: Likewise.
	* cpu-lm32.c: Likewise.
	* cpu-m10200.c: Likewise.
	* cpu-m10300.c: Likewise.
	* cpu-m32c.c: Likewise.
	* cpu-m32r.c: Likewise.
	* cpu-m68hc11.c: Likewise.
	* cpu-m68hc12.c: Likewise.
	* cpu-m68k.c: Likewise.
	* cpu-m9s12x.c: Likewise.
	* cpu-m9s12xg.c: Likewise.
	* cpu-mcore.c: Likewise.
	* cpu-mep.c: Likewise.
	* cpu-metag.c: Likewise.
	* cpu-microblaze.c: Likewise.
	* cpu-mips.c: Likewise.
	* cpu-mmix.c: Likewise.
	* cpu-moxie.c: Likewise.
	* cpu-msp430.c: Likewise.
	* cpu-mt.c: Likewise.
	* cpu-nds32.c: Likewise.
	* cpu-nfp.c: Likewise.
	* cpu-nios2.c: Likewise.
	* cpu-ns32k.c: Likewise.
	* cpu-or1k.c: Likewise.
	* cpu-pdp11.c: Likewise.
	* cpu-pj.c: Likewise.
	* cpu-plugin.c: Likewise.
	* cpu-powerpc.c: Likewise.
	* cpu-pru.c: Likewise.
	* cpu-riscv.c: Likewise.
	* cpu-rl78.c: Likewise.
	* cpu-rs6000.c: Likewise.
	* cpu-rx.c: Likewise.
	* cpu-s12z.c: Likewise.
	* cpu-s390.c: Likewise.
	* cpu-score.c: Likewise.
	* cpu-sh.c: Likewise.
	* cpu-sparc.c: Likewise.
	* cpu-spu.c: Likewise.
	* cpu-tic30.c: Likewise.
	* cpu-tic4x.c: Likewise.
	* cpu-tic54x.c: Likewise.
	* cpu-tic6x.c: Likewise.
	* cpu-tic80.c: Likewise.
	* cpu-tilegx.c: Likewise.
	* cpu-tilepro.c: Likewise.
	* cpu-v850.c: Likewise.
	* cpu-v850_rh850.c: Likewise.
	* cpu-vax.c: Likewise.
	* cpu-visium.c: Likewise.
	* cpu-wasm32.c: Likewise.
	* cpu-xc16x.c: Likewise.
	* cpu-xgate.c: Likewise.
	* cpu-xstormy16.c: Likewise.
	* cpu-xtensa.c: Likewise.
	* cpu-z80.c: Likewise.
	* cpu-z8k.c: Likewise.

gas	* testsuite/gas/arm/pr24907.s: New test.
	* testsuite/gas/arm/pr24907.d: Expected disassembly.

bfd/cpu-epiphany.c

@@ -23,36 +23,27 @@
 #include "bfd.h"
 #include "libbfd.h"
 
+#define N(NUMBER, PRINT, ALIGN, DEFAULT, NEXT)		\
+  {							\
+    32,         /* Bits in a word.  */			\
+    32,         /* Bits in an address.  */		\
+    8,	        /* Bits in a byte.  */			\
+    bfd_arch_epiphany,					\
+    NUMBER,						\
+    "epiphany",						\
+    PRINT,						\
+    ALIGN,	/* Section alignment power.  */		\
+    DEFAULT,						\
+    bfd_default_compatible,				\
+    bfd_default_scan,					\
+    bfd_arch_default_fill,				\
+    NEXT,						\
+    0 /* Maximum offset of a reloc from the start of an insn.  */ \
+  }
+
 const bfd_arch_info_type bfd_epiphany16_arch =
-{
-  32,				/* Bits per word */
-  32,				/* Bits per address.  */
-  8,				/* Bits per byte.  */
-  bfd_arch_epiphany,		/* Architecture.  */
-  bfd_mach_epiphany16,		/* Machine.  */
-  "epiphany",			/* Architecture name.  */
-  "epiphany16",			/* Machine name.  */
-  1,				/* Section align power.  */
-  FALSE,			/* The default ?  */
-  bfd_default_compatible,	/* Architecture comparison fn.  */
-  bfd_default_scan,		/* String to architecture convert fn.  */
-  bfd_arch_default_fill,	/* Default fill.  */
-  NULL				/* Next in list.  */
-};
+  N (bfd_mach_epiphany16, "epiphany16", 1, FALSE, NULL);
 
 const bfd_arch_info_type bfd_epiphany_arch =
-{
-  32,				/* Bits per word - not really true.  */
-  32,				/* Bits per address.  */
-  8,				/* Bits per byte.  */
-  bfd_arch_epiphany,		/* Architecture.  */
-  bfd_mach_epiphany32,		/* Machine.  */
-  "epiphany",			/* Architecture name.  */
-  "epiphany32",			/* Machine name.  */
-  2,				/* Section align power.  */
-  TRUE,				/* The default ?  */
-  bfd_default_compatible,	/* Architecture comparison fn.  */
-  bfd_default_scan,		/* String to architecture convert fn.  */
-  bfd_arch_default_fill,	/* Default fill.  */
-  & bfd_epiphany16_arch	/* Next in list.  */
-};
+  N (bfd_mach_epiphany32, "epiphany32", 2, TRUE, & bfd_epiphany16_arch);
+