sim: constify various integer readers

These functions only read from memory, so mark the pointer as const.

sim/aarch64/interp.c

@@ -171,7 +171,7 @@ sim_create_inferior (SIM_DESC sd, struct bfd *abfd,
 /* Read the LENGTH bytes at BUF as a little-endian value.  */
 
 static bfd_vma
-get_le (unsigned char *buf, unsigned int length)
+get_le (const unsigned char *buf, unsigned int length)
 {
   bfd_vma acc = 0;
 

sim/arm/iwmmxt.c

@@ -3723,7 +3723,7 @@ Fetch_Iwmmxt_Register (unsigned int regnum, unsigned char * memory)
 }
 
 int
-Store_Iwmmxt_Register (unsigned int regnum, unsigned char * memory)
+Store_Iwmmxt_Register (unsigned int regnum, const unsigned char * memory)
 {
   if (regnum >= 16)
     {

sim/arm/iwmmxt.h

@@ -24,4 +24,4 @@ extern unsigned IwmmxtCDP (ARMul_State *, unsigned, ARMword);
 extern int ARMul_HandleIwmmxt (ARMul_State *, ARMword);
 
 extern int Fetch_Iwmmxt_Register (unsigned int, unsigned char *);
-extern int Store_Iwmmxt_Register (unsigned int, unsigned char *);
+extern int Store_Iwmmxt_Register (unsigned int, const unsigned char *);

sim/arm/wrapper.c

@@ -397,7 +397,7 @@ sim_create_inferior (SIM_DESC sd ATTRIBUTE_UNUSED,
 }
 
 static int
-frommem (struct ARMul_State *state, unsigned char *memory)
+frommem (struct ARMul_State *state, const unsigned char *memory)
 {
   if (state->bigendSig == HIGH)
     return (memory[0] << 24) | (memory[1] << 16)

sim/bfin/machs.c

@@ -1758,7 +1758,7 @@ bfin_model_init (SIM_CPU *cpu)
 }
 
 static bu32
-bfin_extract_unsigned_integer (unsigned char *addr, int len)
+bfin_extract_unsigned_integer (const unsigned char *addr, int len)
 {
   bu32 retval;
   unsigned char * p;

sim/cr16/interp.c

@@ -690,7 +690,7 @@ sim_create_inferior (SIM_DESC sd, struct bfd *abfd,
 }
 
 static uint32_t
-cr16_extract_unsigned_integer (unsigned char *addr, int len)
+cr16_extract_unsigned_integer (const unsigned char *addr, int len)
 {
   uint32_t retval;
   unsigned char * p;

sim/d10v/d10v_sim.h

@@ -445,9 +445,9 @@ extern uint8_t *imem_addr (SIM_DESC, SIM_CPU *, uint32_t);
 #undef ENDIAN_INLINE
 
 #else
-extern uint32_t get_longword (uint8_t *);
-extern uint16_t get_word (uint8_t *);
-extern int64_t get_longlong (uint8_t *);
+extern uint32_t get_longword (const uint8_t *);
+extern uint16_t get_word (const uint8_t *);
+extern int64_t get_longlong (const uint8_t *);
 extern void write_word (uint8_t *addr, uint16_t data);
 extern void write_longword (uint8_t *addr, uint32_t data);
 extern void write_longlong (uint8_t *addr, int64_t data);

sim/d10v/endian.c

@@ -11,19 +11,19 @@
 #endif
 
 ENDIAN_INLINE uint16_t
-get_word (uint8_t *x)
+get_word (const uint8_t *x)
 {
   return ((uint16_t)x[0]<<8) + x[1];
 }
 
 ENDIAN_INLINE uint32_t
-get_longword (uint8_t *x)
+get_longword (const uint8_t *x)
 {
   return ((uint32_t)x[0]<<24) + ((uint32_t)x[1]<<16) + ((uint32_t)x[2]<<8) + ((uint32_t)x[3]);
 }
 
 ENDIAN_INLINE int64_t
-get_longlong (uint8_t *x)
+get_longlong (const uint8_t *x)
 {
   uint32_t top = get_longword (x);
   uint32_t bottom = get_longword (x+4);

sim/ft32/interp.c

@@ -56,7 +56,7 @@
 #define RAM_BIAS  0x800000  /* Bias added to RAM addresses.  */
 
 static unsigned long
-ft32_extract_unsigned_integer (unsigned char *addr, int len)
+ft32_extract_unsigned_integer (const unsigned char *addr, int len)
 {
   unsigned long retval;
   unsigned char *p;

sim/m32c/gdb-if.c

@@ -184,7 +184,7 @@ sim_write (SIM_DESC sd, SIM_ADDR mem, const void *buf, int length)
 
 /* Read the LENGTH bytes at BUF as an little-endian value.  */
 static DI
-get_le (unsigned char *buf, int length)
+get_le (const unsigned char *buf, int length)
 {
   DI acc = 0;
   while (--length >= 0)

sim/mcore/interp.c

@@ -42,7 +42,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
 
 static unsigned long
-mcore_extract_unsigned_integer (unsigned char *addr, int len)
+mcore_extract_unsigned_integer (const unsigned char *addr, int len)
 {
   unsigned long retval;
   unsigned char * p;

sim/microblaze/interp.c

@@ -38,7 +38,7 @@
 #define target_big_endian (CURRENT_TARGET_BYTE_ORDER == BFD_ENDIAN_BIG)
 
 static unsigned long
-microblaze_extract_unsigned_integer (unsigned char *addr, int len)
+microblaze_extract_unsigned_integer (const unsigned char *addr, int len)
 {
   unsigned long retval;
   unsigned char *p;

sim/moxie/interp.c

@@ -57,7 +57,7 @@ typedef unsigned int uword;
      + (sim_core_read_aligned_1 (scpu, cia, read_map, addr+1))) << 16) >> 16)
 
 static unsigned long
-moxie_extract_unsigned_integer (unsigned char *addr, int len)
+moxie_extract_unsigned_integer (const unsigned char *addr, int len)
 {
   unsigned long retval;
   unsigned char * p;

sim/pru/interp.c

@@ -45,12 +45,12 @@ enum {
 
 /* Extract (from PRU endianess) and return an integer in HOST's endianness.  */
 static uint32_t
-pru_extract_unsigned_integer (uint8_t *addr, size_t len)
+pru_extract_unsigned_integer (const uint8_t *addr, size_t len)
 {
   uint32_t retval;
-  uint8_t *p;
-  uint8_t *startaddr = addr;
-  uint8_t *endaddr = startaddr + len;
+  const uint8_t *p;
+  const uint8_t *startaddr = addr;
+  const uint8_t *endaddr = startaddr + len;
 
   /* Start at the most significant end of the integer, and work towards
      the least significant.  */

sim/rl78/gdb-if.c

@@ -237,7 +237,7 @@ sim_write (SIM_DESC sd, SIM_ADDR mem, const void *buf, int length)
 /* Read the LENGTH bytes at BUF as an little-endian value.  */
 
 static SI
-get_le (unsigned char *buf, int length)
+get_le (const unsigned char *buf, int length)
 {
   SI acc = 0;
 

sim/rx/gdb-if.c

@@ -276,7 +276,7 @@ sim_write (SIM_DESC sd, SIM_ADDR mem, const void *buffer, int length)
 
 /* Read the LENGTH bytes at BUF as an little-endian value.  */
 static DI
-get_le (unsigned char *buf, int length)
+get_le (const unsigned char *buf, int length)
 {
   DI acc = 0;
   while (--length >= 0)
@@ -287,7 +287,7 @@ get_le (unsigned char *buf, int length)
 
 /* Read the LENGTH bytes at BUF as a big-endian value.  */
 static DI
-get_be (unsigned char *buf, int length)
+get_be (const unsigned char *buf, int length)
 {
   DI acc = 0;
   while (length-- > 0)