Don't write to inferior_ptid in linux_get_siginfo_data

[deliverable/binutils-gdb.git] / sim / mips / interp.c

diff --git a/sim/mips/interp.c b/sim/mips/interp.c
index 0ca6f1aef205646591080463865e18af7342ff25..9dbac8c58fc76f8a3e54c9819037c25bc0a495b6 100644 (file)
--- a/sim/mips/interp.c
+++ b/sim/mips/interp.c
@@ -55,6 +55,7 @@ code on the hardware.
 #include "getopt.h"
 #include "libiberty.h"
 #include "bfd.h"
+#include "elf-bfd.h"
 #include "gdb/callback.h"   /* GDB simulator callback interface */
 #include "gdb/remote-sim.h" /* GDB simulator interface */
 
@@ -342,8 +343,12 @@ mips_pc_set (sim_cpu *cpu, sim_cia pc)
   PC = pc;
 }
 
+static int mips_reg_fetch (SIM_CPU *, int, unsigned char *, int);
+static int mips_reg_store (SIM_CPU *, int, unsigned char *, int);
+
 SIM_DESC
-sim_open (SIM_OPEN_KIND kind, host_callback *cb, struct bfd *abfd, char **argv)
+sim_open (SIM_OPEN_KIND kind, host_callback *cb,
+         struct bfd *abfd, char * const *argv)
 {
   int i;
   SIM_DESC sd = sim_state_alloc (kind, cb);
@@ -373,9 +378,7 @@ sim_open (SIM_OPEN_KIND kind, host_callback *cb, struct bfd *abfd, char **argv)
   sim_add_option_table (sd, NULL, mips_options);
 
 
-  /* getopt will print the error message so we just have to exit if this fails.
-     FIXME: Hmmm...  in the case of gdb we need getopt to call
-     print_filtered.  */
+  /* The parser will print an error message for us, so we silently return.  */
   if (sim_parse_args (sd, argv) != SIM_RC_OK)
     {
       /* Uninstall the modules to avoid memory leaks,
@@ -803,6 +806,8 @@ sim_open (SIM_OPEN_KIND kind, host_callback *cb, struct bfd *abfd, char **argv)
     {
       SIM_CPU *cpu = STATE_CPU (sd, i);
 
+      CPU_REG_FETCH (cpu) = mips_reg_fetch;
+      CPU_REG_STORE (cpu) = mips_reg_store;
       CPU_PC_FETCH (cpu) = mips_pc_get;
       CPU_PC_STORE (cpu) = mips_pc_set;
     }
@@ -840,15 +845,11 @@ mips_sim_close (SIM_DESC sd, int quitting)
 #endif
 }
 
-int
-sim_store_register (SIM_DESC sd, int rn, unsigned char *memory, int length)
+static int
+mips_reg_store (SIM_CPU *cpu, int rn, unsigned char *memory, int length)
 {
-  sim_cpu *cpu = STATE_CPU (sd, 0); /* FIXME */
   /* NOTE: gdb (the client) stores registers in target byte order
      while the simulator uses host byte order */
-#ifdef DEBUG
-  sim_io_printf(sd,"sim_store_register(%d,*memory=0x%s);\n",rn,pr_addr(*((SIM_ADDR *)memory)));
-#endif /* DEBUG */
 
   /* Unfortunately this suffers from the same problem as the register
      numbering one. We need to know what the width of each logical
@@ -856,12 +857,10 @@ sim_store_register (SIM_DESC sd, int rn, unsigned char *memory, int length)
 
   if (cpu->register_widths[rn] == 0)
     {
-      sim_io_eprintf(sd,"Invalid register width for %d (register store ignored)\n",rn);
+      sim_io_eprintf (CPU_STATE (cpu), "Invalid register width for %d (register store ignored)\n", rn);
       return 0;
     }
 
-
-
   if (rn >= FGR_BASE && rn < FGR_BASE + NR_FGR)
     {
       cpu->fpr_state[rn - FGR_BASE] = fmt_uninterpreted;
@@ -925,26 +924,18 @@ sim_store_register (SIM_DESC sd, int rn, unsigned char *memory, int length)
   return 0;
 }
 
-int
-sim_fetch_register (SIM_DESC sd, int rn, unsigned char *memory, int length)
+static int
+mips_reg_fetch (SIM_CPU *cpu, int rn, unsigned char *memory, int length)
 {
-  sim_cpu *cpu = STATE_CPU (sd, 0); /* FIXME */
   /* NOTE: gdb (the client) stores registers in target byte order
      while the simulator uses host byte order */
-#ifdef DEBUG
-#if 0  /* FIXME: doesn't compile */
-  sim_io_printf(sd,"sim_fetch_register(%d=0x%s,mem) : place simulator registers into memory\n",rn,pr_addr(registers[rn]));
-#endif
-#endif /* DEBUG */
 
   if (cpu->register_widths[rn] == 0)
     {
-      sim_io_eprintf (sd, "Invalid register width for %d (register fetch ignored)\n",rn);
+      sim_io_eprintf (CPU_STATE (cpu), "Invalid register width for %d (register fetch ignored)\n", rn);
       return 0;
     }
 
-
-
   /* Any floating point register */
   if (rn >= FGR_BASE && rn < FGR_BASE + NR_FGR)
     {
@@ -1010,7 +1001,8 @@ sim_fetch_register (SIM_DESC sd, int rn, unsigned char *memory, int length)
 }
 
 SIM_RC
-sim_create_inferior (SIM_DESC sd, struct bfd *abfd, char **argv, char **env)
+sim_create_inferior (SIM_DESC sd, struct bfd *abfd,
+                    char * const *argv, char * const *env)
 {
 
 #ifdef DEBUG
@@ -1029,7 +1021,17 @@ sim_create_inferior (SIM_DESC sd, struct bfd *abfd, char **argv, char **env)
       for (cpu_nr = 0; cpu_nr < sim_engine_nr_cpus (sd); cpu_nr++)
        {
          sim_cpu *cpu = STATE_CPU (sd, cpu_nr);
-         CPU_PC_SET (cpu, (unsigned64) bfd_get_start_address (abfd));
+         sim_cia pc = bfd_get_start_address (abfd);
+
+         /* We need to undo brain-dead bfd behavior where it sign-extends
+            addresses that are supposed to be unsigned.  See the mips bfd
+            sign_extend_vma setting.  We have to check the ELF data itself
+            in order to handle o32 & n32 ABIs.  */
+         if (abfd->tdata.elf_obj_data->elf_header->e_ident[EI_CLASS] ==
+             ELFCLASS32)
+           pc = (unsigned32) pc;
+
+         CPU_PC_SET (cpu, pc);
        }
     }