testsuite: Support detection of Intel compilers via test_compiler_version.

[deliverable/binutils-gdb.git] / gdb / ppc64-tdep.c

diff --git a/gdb/ppc64-tdep.c b/gdb/ppc64-tdep.c
index 8732182db3049b5f0a4b1e915b2d5a84756ff049..b7357e3c43af98a85bedf977b5a9360957406282 100644 (file)
--- a/gdb/ppc64-tdep.c
+++ b/gdb/ppc64-tdep.c
@@ -1,6 +1,6 @@
 /* Common target-dependent code for ppc64 GDB, the GNU debugger.
 
 /* Common target-dependent code for ppc64 GDB, the GNU debugger.
 

-   Copyright (C) 1986-2013 Free Software Foundation, Inc.
+   Copyright (C) 1986-2016 Free Software Foundation, Inc.

 
    This file is part of GDB.
 
 
    This file is part of GDB.
 


@@ -20,6 +20,7 @@
 #include "defs.h"
 #include "frame.h"
 #include "gdbcore.h"
 #include "defs.h"
 #include "frame.h"
 #include "gdbcore.h"

+#include "infrun.h"

 #include "ppc-tdep.h"
 #include "ppc64-tdep.h"
 #include "elf-bfd.h"
 #include "ppc-tdep.h"
 #include "ppc64-tdep.h"
 #include "elf-bfd.h"


@@ -48,21 +49,21 @@
    | (((spr) & 0x3e0) << 6)                     \
    | (((xo) & 0x3ff) << 1))
 
    | (((spr) & 0x3e0) << 6)                     \
    | (((xo) & 0x3ff) << 1))
 

-/* If DESC is the address of a 64-bit PowerPC FreeBSD function
-   descriptor, return the descriptor's entry point.  */
+/* If PLT is the address of a 64-bit PowerPC PLT entry,
+   return the function's entry point.  */

 
 static CORE_ADDR
 
 static CORE_ADDR

-ppc64_desc_entry_point (struct gdbarch *gdbarch, CORE_ADDR desc)
+ppc64_plt_entry_point (struct gdbarch *gdbarch, CORE_ADDR plt)

 {
   enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
 {
   enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);

-  /* The first word of the descriptor is the entry point.  */
-  return (CORE_ADDR) read_memory_unsigned_integer (desc, 8, byte_order);
+  /* The first word of the PLT entry is the function entry point.  */
+  return (CORE_ADDR) read_memory_unsigned_integer (plt, 8, byte_order);

 }
 
 /* Patterns for the standard linkage functions.  These are built by
    build_plt_stub in bfd/elf64-ppc.c.  */
 
 }
 
 /* Patterns for the standard linkage functions.  These are built by
    build_plt_stub in bfd/elf64-ppc.c.  */
 

-/* Old PLT call stub.  */
+/* Old ELFv1 PLT call stub.  */

 
 static struct ppc_insn_pattern ppc64_standard_linkage1[] =
   {
 
 static struct ppc_insn_pattern ppc64_standard_linkage1[] =
   {


@@ -96,7 +97,7 @@ static struct ppc_insn_pattern ppc64_standard_linkage1[] =
     { 0, 0, 0 }
   };
 
     { 0, 0, 0 }
   };
 

-/* Current PLT call stub to access PLT entries more than +/- 32k from r2.
+/* ELFv1 PLT call stub to access PLT entries more than +/- 32k from r2.

    Also supports older stub with different placement of std 2,40(1),
    a stub that omits the std 2,40(1), and both versions of power7
    thread safety read barriers.  Note that there are actually two more
    Also supports older stub with different placement of std 2,40(1),
    a stub that omits the std 2,40(1), and both versions of power7
    thread safety read barriers.  Note that there are actually two more


@@ -144,7 +145,7 @@ static struct ppc_insn_pattern ppc64_standard_linkage2[] =
     { 0, 0, 0 }
   };
 
     { 0, 0, 0 }
   };
 

-/* Current PLT call stub to access PLT entries within +/- 32k of r2.  */
+/* ELFv1 PLT call stub to access PLT entries within +/- 32k of r2.  */

 
 static struct ppc_insn_pattern ppc64_standard_linkage3[] =
   {
 
 static struct ppc_insn_pattern ppc64_standard_linkage3[] =
   {


@@ -181,6 +182,151 @@ static struct ppc_insn_pattern ppc64_standard_linkage3[] =
     { 0, 0, 0 }
   };
 
     { 0, 0, 0 }
   };
 

+/* ELFv1 PLT call stub to access PLT entries more than +/- 32k from r2.
+   A more modern variant of ppc64_standard_linkage2 differing in
+   register usage.  */
+
+static struct ppc_insn_pattern ppc64_standard_linkage4[] =
+  {
+    /* std r2, 40(r1) <optional> */
+    { -1, insn_ds (62, 2, 1, 40, 0), 1 },
+
+    /* addis r11, r2, <any> */
+    { insn_d (-1, -1, -1, 0), insn_d (15, 11, 2, 0), 0 },
+
+    /* ld r12, <any>(r11) */
+    { insn_ds (-1, -1, -1, 0, -1), insn_ds (58, 12, 11, 0, 0), 0 },
+
+    /* addi r11, r11, <any> <optional> */
+    { insn_d (-1, -1, -1, 0), insn_d (14, 11, 11, 0), 1 },
+
+    /* mtctr r12 */
+    { insn_xfx (-1, -1, -1, -1), insn_xfx (31, 12, 9, 467), 0 },
+
+    /* xor r2, r12, r12 <optional> */
+    { -1, 0x7d826278, 1 },
+
+    /* add r11, r11, r2 <optional> */
+    { -1, 0x7d6b1214, 1 },
+
+    /* ld r2, <any>(r11) */
+    { insn_ds (-1, -1, -1, 0, -1), insn_ds (58, 2, 11, 0, 0), 0 },
+
+    /* ld r11, <any>(r11) <optional> */
+    { insn_ds (-1, -1, -1, 0, -1), insn_ds (58, 11, 11, 0, 0), 1 },
+
+    /* bctr <optional> */
+    { -1, 0x4e800420, 1 },
+
+    /* cmpldi r2, 0 <optional> */
+    { -1, 0x28220000, 1 },
+
+    { 0, 0, 0 }
+  };
+
+/* ELFv1 PLT call stub to access PLT entries within +/- 32k of r2.
+   A more modern variant of ppc64_standard_linkage3 differing in
+   register usage.  */
+
+static struct ppc_insn_pattern ppc64_standard_linkage5[] =
+  {
+    /* std r2, 40(r1) <optional> */
+    { -1, insn_ds (62, 2, 1, 40, 0), 1 },
+
+    /* ld r12, <any>(r2) */
+    { insn_ds (-1, -1, -1, 0, -1), insn_ds (58, 12, 2, 0, 0), 0 },
+
+    /* addi r2, r2, <any> <optional> */
+    { insn_d (-1, -1, -1, 0), insn_d (14, 2, 2, 0), 1 },
+
+    /* mtctr r12 */
+    { insn_xfx (-1, -1, -1, -1), insn_xfx (31, 12, 9, 467), 0 },
+
+    /* xor r11, r12, r12 <optional> */
+    { -1, 0x7d8b6278, 1 },
+
+    /* add r2, r2, r11 <optional> */
+    { -1, 0x7c425a14, 1 },
+
+    /* ld r11, <any>(r2) <optional> */
+    { insn_ds (-1, -1, -1, 0, -1), insn_ds (58, 11, 2, 0, 0), 1 },
+
+    /* ld r2, <any>(r2) */
+    { insn_ds (-1, -1, -1, 0, -1), insn_ds (58, 2, 2, 0, 0), 0 },
+
+    /* bctr <optional> */
+    { -1, 0x4e800420, 1 },
+
+    /* cmpldi r2, 0 <optional> */
+    { -1, 0x28220000, 1 },
+
+    { 0, 0, 0 }
+  };
+
+/* ELFv2 PLT call stub to access PLT entries more than +/- 32k from r2.  */
+
+static struct ppc_insn_pattern ppc64_standard_linkage6[] =
+  {
+    /* std r2, 24(r1) <optional> */
+    { -1, insn_ds (62, 2, 1, 24, 0), 1 },
+
+    /* addis r11, r2, <any> */
+    { insn_d (-1, -1, -1, 0), insn_d (15, 11, 2, 0), 0 },
+
+    /* ld r12, <any>(r11) */
+    { insn_ds (-1, -1, -1, 0, -1), insn_ds (58, 12, 11, 0, 0), 0 },
+
+    /* mtctr r12 */
+    { insn_xfx (-1, -1, -1, -1), insn_xfx (31, 12, 9, 467), 0 },
+
+    /* bctr */
+    { -1, 0x4e800420, 0 },
+
+    { 0, 0, 0 }
+  };
+
+/* ELFv2 PLT call stub to access PLT entries within +/- 32k of r2.  */
+
+static struct ppc_insn_pattern ppc64_standard_linkage7[] =
+  {
+    /* std r2, 24(r1) <optional> */
+    { -1, insn_ds (62, 2, 1, 24, 0), 1 },
+
+    /* ld r12, <any>(r2) */
+    { insn_ds (-1, -1, -1, 0, -1), insn_ds (58, 12, 2, 0, 0), 0 },
+
+    /* mtctr r12 */
+    { insn_xfx (-1, -1, -1, -1), insn_xfx (31, 12, 9, 467), 0 },
+
+    /* bctr */
+    { -1, 0x4e800420, 0 },
+
+    { 0, 0, 0 }
+  };
+
+/* ELFv2 PLT call stub to access PLT entries more than +/- 32k from r2,
+   supporting fusion.  */
+
+static struct ppc_insn_pattern ppc64_standard_linkage8[] =
+  {
+    /* std r2, 24(r1) <optional> */
+    { -1, insn_ds (62, 2, 1, 24, 0), 1 },
+
+    /* addis r12, r2, <any> */
+    { insn_d (-1, -1, -1, 0), insn_d (15, 12, 2, 0), 0 },
+
+    /* ld r12, <any>(r12) */
+    { insn_ds (-1, -1, -1, 0, -1), insn_ds (58, 12, 12, 0, 0), 0 },
+
+    /* mtctr r12 */
+    { insn_xfx (-1, -1, -1, -1), insn_xfx (31, 12, 9, 467), 0 },
+
+    /* bctr */
+    { -1, 0x4e800420, 0 },
+
+    { 0, 0, 0 }
+  };
+

 /* When the dynamic linker is doing lazy symbol resolution, the first
    call to a function in another object will go like this:
 
 /* When the dynamic linker is doing lazy symbol resolution, the first
    call to a function in another object will go like this:
 


@@ -243,16 +389,14 @@ ppc64_standard_linkage1_target (struct frame_info *frame,
   struct gdbarch *gdbarch = get_frame_arch (frame);
   struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
 
   struct gdbarch *gdbarch = get_frame_arch (frame);
   struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
 

-  /* The address of the function descriptor this linkage function
-     references.  */
-  CORE_ADDR desc
+  /* The address of the PLT entry this linkage function references.  */
+  CORE_ADDR plt

     = ((CORE_ADDR) get_frame_register_unsigned (frame,
                                                tdep->ppc_gp0_regnum + 2)
        + (ppc_insn_d_field (insn[0]) << 16)
        + ppc_insn_ds_field (insn[2]));
 
     = ((CORE_ADDR) get_frame_register_unsigned (frame,
                                                tdep->ppc_gp0_regnum + 2)
        + (ppc_insn_d_field (insn[0]) << 16)
        + ppc_insn_ds_field (insn[2]));
 

-  /* The first word of the descriptor is the entry point.  Return that.  */
-  return ppc64_desc_entry_point (gdbarch, desc);
+  return ppc64_plt_entry_point (gdbarch, plt);

 }
 
 static CORE_ADDR
 }
 
 static CORE_ADDR


@@ -262,16 +406,14 @@ ppc64_standard_linkage2_target (struct frame_info *frame,
   struct gdbarch *gdbarch = get_frame_arch (frame);
   struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
 
   struct gdbarch *gdbarch = get_frame_arch (frame);
   struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
 

-  /* The address of the function descriptor this linkage function
-     references.  */
-  CORE_ADDR desc
+  /* The address of the PLT entry this linkage function references.  */
+  CORE_ADDR plt

     = ((CORE_ADDR) get_frame_register_unsigned (frame,
                                                tdep->ppc_gp0_regnum + 2)
        + (ppc_insn_d_field (insn[1]) << 16)
        + ppc_insn_ds_field (insn[3]));
 
     = ((CORE_ADDR) get_frame_register_unsigned (frame,
                                                tdep->ppc_gp0_regnum + 2)
        + (ppc_insn_d_field (insn[1]) << 16)
        + ppc_insn_ds_field (insn[3]));
 

-  /* The first word of the descriptor is the entry point.  Return that.  */
-  return ppc64_desc_entry_point (gdbarch, desc);
+  return ppc64_plt_entry_point (gdbarch, plt);

 }
 
 static CORE_ADDR
 }
 
 static CORE_ADDR


@@ -281,46 +423,125 @@ ppc64_standard_linkage3_target (struct frame_info *frame,
   struct gdbarch *gdbarch = get_frame_arch (frame);
   struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
 
   struct gdbarch *gdbarch = get_frame_arch (frame);
   struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
 

-  /* The address of the function descriptor this linkage function
-     references.  */
-  CORE_ADDR desc
+  /* The address of the PLT entry this linkage function references.  */
+  CORE_ADDR plt

     = ((CORE_ADDR) get_frame_register_unsigned (frame,
                                                tdep->ppc_gp0_regnum + 2)
        + ppc_insn_ds_field (insn[1]));
 
     = ((CORE_ADDR) get_frame_register_unsigned (frame,
                                                tdep->ppc_gp0_regnum + 2)
        + ppc_insn_ds_field (insn[1]));
 

-  /* The first word of the descriptor is the entry point.  Return that.  */
-  return ppc64_desc_entry_point (gdbarch, desc);
+  return ppc64_plt_entry_point (gdbarch, plt);
+}
+
+static CORE_ADDR
+ppc64_standard_linkage4_target (struct frame_info *frame,
+                               CORE_ADDR pc, unsigned int *insn)
+{
+  struct gdbarch *gdbarch = get_frame_arch (frame);
+  struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+
+  CORE_ADDR plt
+    = ((CORE_ADDR) get_frame_register_unsigned (frame, tdep->ppc_gp0_regnum + 2)
+       + (ppc_insn_d_field (insn[1]) << 16)
+       + ppc_insn_ds_field (insn[2]));
+
+  return ppc64_plt_entry_point (gdbarch, plt);

 }
 
 
 /* Given that we've begun executing a call trampoline at PC, return
 }
 
 
 /* Given that we've begun executing a call trampoline at PC, return

-   the entry point of the function the trampoline will go to.  */
+   the entry point of the function the trampoline will go to.

 
 

-CORE_ADDR
-ppc64_skip_trampoline_code (struct frame_info *frame, CORE_ADDR pc)
+   When the execution direction is EXEC_REVERSE, scan backward to
+   check whether we are in the middle of a PLT stub.  */
+
+static CORE_ADDR
+ppc64_skip_trampoline_code_1 (struct frame_info *frame, CORE_ADDR pc)

 {
 #define MAX(a,b) ((a) > (b) ? (a) : (b))
 {
 #define MAX(a,b) ((a) > (b) ? (a) : (b))

-  unsigned int insns[MAX (MAX (ARRAY_SIZE (ppc64_standard_linkage1),
-                              ARRAY_SIZE (ppc64_standard_linkage2)),
-                         ARRAY_SIZE (ppc64_standard_linkage3)) - 1];
+  unsigned int insns[MAX (MAX (MAX (ARRAY_SIZE (ppc64_standard_linkage1),
+                                   ARRAY_SIZE (ppc64_standard_linkage2)),
+                              MAX (ARRAY_SIZE (ppc64_standard_linkage3),
+                                   ARRAY_SIZE (ppc64_standard_linkage4))),
+                         MAX (MAX (ARRAY_SIZE (ppc64_standard_linkage5),
+                                   ARRAY_SIZE (ppc64_standard_linkage6)),
+                              MAX (ARRAY_SIZE (ppc64_standard_linkage7),
+                                   ARRAY_SIZE (ppc64_standard_linkage8))))
+                    - 1];

   CORE_ADDR target;
   CORE_ADDR target;

+  int scan_limit, i;
+
+  scan_limit = 1;
+  /* When reverse-debugging, scan backward to check whether we are
+     in the middle of trampoline code.  */
+  if (execution_direction == EXEC_REVERSE)
+    scan_limit = ARRAY_SIZE (insns) - 1;
+
+  for (i = 0; i < scan_limit; i++)
+    {
+      if (i < ARRAY_SIZE (ppc64_standard_linkage8) - 1
+         && ppc_insns_match_pattern (frame, pc, ppc64_standard_linkage8, insns))
+       pc = ppc64_standard_linkage4_target (frame, pc, insns);
+      else if (i < ARRAY_SIZE (ppc64_standard_linkage7) - 1
+              && ppc_insns_match_pattern (frame, pc, ppc64_standard_linkage7,
+                                          insns))
+       pc = ppc64_standard_linkage3_target (frame, pc, insns);
+      else if (i < ARRAY_SIZE (ppc64_standard_linkage6) - 1
+              && ppc_insns_match_pattern (frame, pc, ppc64_standard_linkage6,
+                                          insns))
+       pc = ppc64_standard_linkage4_target (frame, pc, insns);
+      else if (i < ARRAY_SIZE (ppc64_standard_linkage5) - 1
+              && ppc_insns_match_pattern (frame, pc, ppc64_standard_linkage5,
+                                          insns)
+              && (insns[8] != 0 || insns[9] != 0))
+       pc = ppc64_standard_linkage3_target (frame, pc, insns);
+      else if (i < ARRAY_SIZE (ppc64_standard_linkage4) - 1
+              && ppc_insns_match_pattern (frame, pc, ppc64_standard_linkage4,
+                                          insns)
+              && (insns[9] != 0 || insns[10] != 0))
+       pc = ppc64_standard_linkage4_target (frame, pc, insns);
+      else if (i < ARRAY_SIZE (ppc64_standard_linkage3) - 1
+              && ppc_insns_match_pattern (frame, pc, ppc64_standard_linkage3,
+                                          insns)
+              && (insns[8] != 0 || insns[9] != 0))
+       pc = ppc64_standard_linkage3_target (frame, pc, insns);
+      else if (i < ARRAY_SIZE (ppc64_standard_linkage2) - 1
+              && ppc_insns_match_pattern (frame, pc, ppc64_standard_linkage2,
+                                          insns)
+              && (insns[10] != 0 || insns[11] != 0))
+       pc = ppc64_standard_linkage2_target (frame, pc, insns);
+      else if (i < ARRAY_SIZE (ppc64_standard_linkage1) - 1
+              && ppc_insns_match_pattern (frame, pc, ppc64_standard_linkage1,
+                                          insns))
+       pc = ppc64_standard_linkage1_target (frame, pc, insns);
+      else
+       {
+         /* Scan backward one more instructions if doesn't match.  */
+         pc -= 4;
+         continue;
+       }
+
+      /* The PLT descriptor will either point to the already resolved target
+         address, or else to a glink stub.  As the latter carry synthetic @plt
+         symbols, find_solib_trampoline_target should be able to resolve them.  */
+      target = find_solib_trampoline_target (frame, pc);
+      return target ? target : pc;
+  }
+
+  return 0;
+}
+
+/* Wrapper of ppc64_skip_trampoline_code_1 checking also
+   ppc_elfv2_skip_entrypoint.  */
+
+CORE_ADDR
+ppc64_skip_trampoline_code (struct frame_info *frame, CORE_ADDR pc)
+{
+  struct gdbarch *gdbarch = get_frame_arch (frame);

 
 

-  if (ppc_insns_match_pattern (frame, pc, ppc64_standard_linkage3, insns)
-      && (insns[8] != 0 || insns[9] != 0))
-    pc = ppc64_standard_linkage3_target (frame, pc, insns);
-  else if (ppc_insns_match_pattern (frame, pc, ppc64_standard_linkage2, insns)
-          && (insns[10] != 0 || insns[11] != 0))
-    pc = ppc64_standard_linkage2_target (frame, pc, insns);
-  else if (ppc_insns_match_pattern (frame, pc, ppc64_standard_linkage1, insns))
-    pc = ppc64_standard_linkage1_target (frame, pc, insns);
-  else
-    return 0;
-
-  /* The PLT descriptor will either point to the already resolved target
-     address, or else to a glink stub.  As the latter carry synthetic @plt
-     symbols, find_solib_trampoline_target should be able to resolve them.  */
-  target = find_solib_trampoline_target (frame, pc);
-  return target ? target : pc;
+  pc = ppc64_skip_trampoline_code_1 (frame, pc);
+  if (pc != 0 && gdbarch_skip_entrypoint_p (gdbarch))
+    pc = gdbarch_skip_entrypoint (gdbarch, pc);
+  return pc;

 }
 
 /* Support for convert_from_func_ptr_addr (ARCH, ADDR, TARG) on PPC64
 }
 
 /* Support for convert_from_func_ptr_addr (ARCH, ADDR, TARG) on PPC64


@@ -383,7 +604,8 @@ ppc64_convert_from_func_ptr_addr (struct gdbarch *gdbarch,
       gdb_byte buf[8];
       int res;
 
       gdb_byte buf[8];
       int res;
 

-      res = bfd_get_section_contents (s->bfd, s->the_bfd_section,
+      res = bfd_get_section_contents (s->the_bfd_section->owner,
+                                     s->the_bfd_section,

                                      &buf, addr - s->addr, 8);
       if (res != 0)
        return extract_unsigned_integer (buf, 8, byte_order)
                                      &buf, addr - s->addr, 8);
       if (res != 0)
        return extract_unsigned_integer (buf, 8, byte_order)