gdb/doc/

[binutils-gdb.git] / gdb / mips-linux-tdep.c

diff --git a/gdb/mips-linux-tdep.c b/gdb/mips-linux-tdep.c
index 242196ac790b4ddec2db307d7c9fc44401b8cfb6..5924b30984db3d95f2219f18082da3c3b1de7c98 100644 (file)
--- a/gdb/mips-linux-tdep.c
+++ b/gdb/mips-linux-tdep.c
@@ -1,6 +1,6 @@
 /* Target-dependent code for GNU/Linux on MIPS processors.
 
-   Copyright (C) 2001, 2002, 2004, 2005, 2006, 2007, 2008, 2009
+   Copyright (C) 2001, 2002, 2004, 2005, 2006, 2007, 2008, 2009, 2010
    Free Software Foundation, Inc.
 
    This file is part of GDB.
@@ -55,6 +55,7 @@ mips_linux_get_longjmp_target (struct frame_info *frame, CORE_ADDR *pc)
 {
   CORE_ADDR jb_addr;
   struct gdbarch *gdbarch = get_frame_arch (frame);
+  enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
   char buf[gdbarch_ptr_bit (gdbarch) / TARGET_CHAR_BIT];
 
   jb_addr = get_frame_register_unsigned (frame, MIPS_A0_REGNUM);
@@ -65,7 +66,8 @@ mips_linux_get_longjmp_target (struct frame_info *frame, CORE_ADDR *pc)
     return 0;
 
   *pc = extract_unsigned_integer (buf,
-                                 gdbarch_ptr_bit (gdbarch) / TARGET_CHAR_BIT);
+                                 gdbarch_ptr_bit (gdbarch) / TARGET_CHAR_BIT,
+                                 byte_order);
 
   return 1;
 }
@@ -77,10 +79,11 @@ mips_linux_get_longjmp_target (struct frame_info *frame, CORE_ADDR *pc)
 static void
 supply_32bit_reg (struct regcache *regcache, int regnum, const void *addr)
 {
+  struct gdbarch *gdbarch = get_regcache_arch (regcache);
+  enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
   gdb_byte buf[MAX_REGISTER_SIZE];
-  store_signed_integer (buf,
-                       register_size (get_regcache_arch (regcache), regnum),
-                        extract_signed_integer (addr, 4));
+  store_signed_integer (buf, register_size (gdbarch, regnum), byte_order,
+                        extract_signed_integer (addr, 4, byte_order));
   regcache_raw_supply (regcache, regnum, buf);
 }
 
@@ -258,6 +261,7 @@ mips64_linux_get_longjmp_target (struct frame_info *frame, CORE_ADDR *pc)
 {
   CORE_ADDR jb_addr;
   struct gdbarch *gdbarch = get_frame_arch (frame);
+  enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
   void *buf = alloca (gdbarch_ptr_bit (gdbarch) / TARGET_CHAR_BIT);
   int element_size = gdbarch_ptr_bit (gdbarch) == 32 ? 4 : 8;
 
@@ -269,7 +273,8 @@ mips64_linux_get_longjmp_target (struct frame_info *frame, CORE_ADDR *pc)
     return 0;
 
   *pc = extract_unsigned_integer (buf,
-                                 gdbarch_ptr_bit (gdbarch) / TARGET_CHAR_BIT);
+                                 gdbarch_ptr_bit (gdbarch) / TARGET_CHAR_BIT,
+                                 byte_order);
 
   return 1;
 }
@@ -343,6 +348,7 @@ mips64_fill_gregset (const struct regcache *regcache,
                     mips64_elf_gregset_t *gregsetp, int regno)
 {
   struct gdbarch *gdbarch = get_regcache_arch (regcache);
+  enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
   int regaddr, regi;
   mips64_elf_greg_t *regp = *gregsetp;
   void *dst;
@@ -388,9 +394,10 @@ mips64_fill_gregset (const struct regcache *regcache,
       LONGEST val;
 
       regcache_raw_collect (regcache, regno, buf);
-      val = extract_signed_integer (buf, register_size (gdbarch, regno));
+      val = extract_signed_integer (buf, register_size (gdbarch, regno),
+                                   byte_order);
       dst = regp + regaddr;
-      store_signed_integer (dst, 8, val);
+      store_signed_integer (dst, 8, byte_order, val);
     }
 }
 
@@ -440,6 +447,7 @@ mips64_fill_fpregset (const struct regcache *regcache,
                      mips64_elf_fpregset_t *fpregsetp, int regno)
 {
   struct gdbarch *gdbarch = get_regcache_arch (regcache);
+  enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
   gdb_byte *to;
 
   if ((regno >= gdbarch_fp0_regnum (gdbarch))
@@ -468,9 +476,10 @@ mips64_fill_fpregset (const struct regcache *regcache,
       LONGEST val;
 
       regcache_raw_collect (regcache, regno, buf);
-      val = extract_signed_integer (buf, register_size (gdbarch, regno));
+      val = extract_signed_integer (buf, register_size (gdbarch, regno),
+                                   byte_order);
       to = (gdb_byte *) (*fpregsetp + 32);
-      store_signed_integer (to, 4, val);
+      store_signed_integer (to, 4, byte_order, val);
     }
   else if (regno == mips_regnum (gdbarch)->fp_implementation_revision)
     {
@@ -478,9 +487,10 @@ mips64_fill_fpregset (const struct regcache *regcache,
       LONGEST val;
 
       regcache_raw_collect (regcache, regno, buf);
-      val = extract_signed_integer (buf, register_size (gdbarch, regno));
+      val = extract_signed_integer (buf, register_size (gdbarch, regno),
+                                   byte_order);
       to = (gdb_byte *) (*fpregsetp + 32) + 4;
-      store_signed_integer (to, 4, val);
+      store_signed_integer (to, 4, byte_order, val);
     }
   else if (regno == -1)
     {
@@ -605,6 +615,7 @@ mips_linux_in_dynsym_stub (CORE_ADDR pc, char *name)
   unsigned char buf[28], *p;
   ULONGEST insn, insn1;
   int n64 = (mips_abi (target_gdbarch) == MIPS_ABI_N64);
+  enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch);
 
   read_memory (pc - 12, buf, 28);
 
@@ -622,7 +633,7 @@ mips_linux_in_dynsym_stub (CORE_ADDR pc, char *name)
   p = buf + 12;
   while (p >= buf)
     {
-      insn = extract_unsigned_integer (p, 4);
+      insn = extract_unsigned_integer (p, 4, byte_order);
       if (insn == insn1)
        break;
       p -= 4;
@@ -630,7 +641,7 @@ mips_linux_in_dynsym_stub (CORE_ADDR pc, char *name)
   if (p < buf)
     return 0;
 
-  insn = extract_unsigned_integer (p + 4, 4);
+  insn = extract_unsigned_integer (p + 4, 4, byte_order);
   if (n64)
     {
       /* daddu t7,ra */
@@ -644,12 +655,12 @@ mips_linux_in_dynsym_stub (CORE_ADDR pc, char *name)
        return 0;
     }
 
-  insn = extract_unsigned_integer (p + 8, 4);
+  insn = extract_unsigned_integer (p + 8, 4, byte_order);
   /* jalr t9,ra */
   if (insn != 0x0320f809)
     return 0;
 
-  insn = extract_unsigned_integer (p + 12, 4);
+  insn = extract_unsigned_integer (p + 12, 4, byte_order);
   if (n64)
     {
       /* daddiu t8,zero,0 */
@@ -702,7 +713,7 @@ mips_linux_skip_resolver (struct gdbarch *gdbarch, CORE_ADDR pc)
   resolver = lookup_minimal_symbol ("__dl_runtime_resolve", NULL, NULL);
 
   if (resolver && SYMBOL_VALUE_ADDRESS (resolver) == pc)
-    return frame_pc_unwind (get_current_frame ());
+    return frame_unwind_caller_pc (get_current_frame ());
 
   return glibc_skip_solib_resolver (gdbarch, pc);
 }
@@ -786,7 +797,7 @@ static const struct tramp_frame mips_linux_n64_rt_sigframe = {
 
    struct sigframe {
      u32 sf_ass[4];            [argument save space for o32]
-     u32 sf_code[2];           [signal trampoline]
+     u32 sf_code[2];           [signal trampoline or fill]
      struct sigcontext sf_sc;
      sigset_t sf_mask;
    };
@@ -816,7 +827,7 @@ static const struct tramp_frame mips_linux_n64_rt_sigframe = {
 
    struct rt_sigframe {
      u32 rs_ass[4];            [argument save space for o32]
-     u32 rs_code[2]            [signal trampoline]
+     u32 rs_code[2]            [signal trampoline or fill]
      struct siginfo rs_info;
      struct ucontext rs_uc;
    };
@@ -831,7 +842,6 @@ static const struct tramp_frame mips_linux_n64_rt_sigframe = {
    };  */
 /* *INDENT-ON* */
 
-#define SIGFRAME_CODE_OFFSET         (4 * 4)
 #define SIGFRAME_SIGCONTEXT_OFFSET   (6 * 4)
 
 #define RTSIGFRAME_SIGINFO_SIZE      128
@@ -860,14 +870,15 @@ mips_linux_o32_sigframe_init (const struct tramp_frame *self,
 {
   struct gdbarch *gdbarch = get_frame_arch (this_frame);
   int ireg, reg_position;
-  CORE_ADDR sigcontext_base = func - SIGFRAME_CODE_OFFSET;
+  CORE_ADDR frame_sp = get_frame_sp (this_frame);
+  CORE_ADDR sigcontext_base;
   const struct mips_regnum *regs = mips_regnum (gdbarch);
   CORE_ADDR regs_base;
 
   if (self == &mips_linux_o32_sigframe)
-    sigcontext_base += SIGFRAME_SIGCONTEXT_OFFSET;
+    sigcontext_base = frame_sp + SIGFRAME_SIGCONTEXT_OFFSET;
   else
-    sigcontext_base += RTSIGFRAME_SIGCONTEXT_OFFSET;
+    sigcontext_base = frame_sp + RTSIGFRAME_SIGCONTEXT_OFFSET;
 
   /* I'm not proud of this hack.  Eventually we will have the
      infrastructure to indicate the size of saved registers on a
@@ -936,9 +947,7 @@ mips_linux_o32_sigframe_init (const struct tramp_frame *self,
                           sigcontext_base + SIGCONTEXT_BADVADDR);
 
   /* Choice of the bottom of the sigframe is somewhat arbitrary.  */
-  trad_frame_set_id (this_cache,
-                    frame_id_build (func - SIGFRAME_CODE_OFFSET,
-                                    func));
+  trad_frame_set_id (this_cache, frame_id_build (frame_sp, func));
 }
 
 /* *INDENT-OFF* */
@@ -946,7 +955,7 @@ mips_linux_o32_sigframe_init (const struct tramp_frame *self,
 
   struct rt_sigframe_n32 {
     u32 rs_ass[4];                  [ argument save space for o32 ]
-    u32 rs_code[2];                 [ signal trampoline ]
+    u32 rs_code[2];                 [ signal trampoline or fill ]
     struct siginfo rs_info;
     struct ucontextn32 rs_uc;
   };
@@ -1027,13 +1036,14 @@ mips_linux_n32n64_sigframe_init (const struct tramp_frame *self,
 {
   struct gdbarch *gdbarch = get_frame_arch (this_frame);
   int ireg, reg_position;
-  CORE_ADDR sigcontext_base = func - SIGFRAME_CODE_OFFSET;
+  CORE_ADDR frame_sp = get_frame_sp (this_frame);
+  CORE_ADDR sigcontext_base;
   const struct mips_regnum *regs = mips_regnum (gdbarch);
 
   if (self == &mips_linux_n32_rt_sigframe)
-    sigcontext_base += N32_SIGFRAME_SIGCONTEXT_OFFSET;
+    sigcontext_base = frame_sp + N32_SIGFRAME_SIGCONTEXT_OFFSET;
   else
-    sigcontext_base += N64_SIGFRAME_SIGCONTEXT_OFFSET;
+    sigcontext_base = frame_sp + N64_SIGFRAME_SIGCONTEXT_OFFSET;
 
   if (mips_linux_restart_reg_p (gdbarch))
     trad_frame_set_reg_addr (this_cache,
@@ -1071,9 +1081,7 @@ mips_linux_n32n64_sigframe_init (const struct tramp_frame *self,
                           sigcontext_base + N64_SIGCONTEXT_LO);
 
   /* Choice of the bottom of the sigframe is somewhat arbitrary.  */
-  trad_frame_set_id (this_cache,
-                    frame_id_build (func - SIGFRAME_CODE_OFFSET,
-                                    func));
+  trad_frame_set_id (this_cache, frame_id_build (frame_sp, func));
 }
 
 static void
@@ -1117,7 +1125,7 @@ mips_linux_syscall_next_pc (struct frame_info *frame)
       || v0 == MIPS_NR_rt_sigreturn
       || v0 == MIPS_NR_N64_rt_sigreturn
       || v0 == MIPS_NR_N32_rt_sigreturn)
-    return frame_pc_unwind (get_current_frame ());
+    return frame_unwind_caller_pc (get_current_frame ());
 
   return pc + 4;
 }