elf/x86: Issue an error on discarded output .plt section

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

diff --git a/gdb/alpha-linux-tdep.c b/gdb/alpha-linux-tdep.c
index 3c71f2f03cd419ba6f0b0debebb1b3f6166f45f0..b821a6bd93ac582d777dc7b5c809aab6ed57dec7 100644 (file)
--- a/gdb/alpha-linux-tdep.c
+++ b/gdb/alpha-linux-tdep.c
@@ -1,6 +1,5 @@
 /* Target-dependent code for GNU/Linux on Alpha.
 /* Target-dependent code for GNU/Linux on Alpha.

-   Copyright (C) 2002, 2003, 2007, 2008, 2009, 2010
-   Free Software Foundation, Inc.
+   Copyright (C) 2002-2021 Free Software Foundation, Inc.

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


@@ -19,15 +18,43 @@
 
 #include "defs.h"
 #include "frame.h"
 
 #include "defs.h"
 #include "frame.h"

-#include "gdb_assert.h"
-#include "gdb_string.h"

 #include "osabi.h"
 #include "solib-svr4.h"
 #include "symtab.h"
 #include "regset.h"
 #include "regcache.h"
 #include "osabi.h"
 #include "solib-svr4.h"
 #include "symtab.h"
 #include "regset.h"
 #include "regcache.h"

-
+#include "linux-tdep.h"

 #include "alpha-tdep.h"
 #include "alpha-tdep.h"

+#include "gdbarch.h"
+
+/* This enum represents the signals' numbers on the Alpha
+   architecture.  It just contains the signal definitions which are
+   different from the generic implementation.
+
+   It is derived from the file <arch/alpha/include/uapi/asm/signal.h>,
+   from the Linux kernel tree.  */
+
+enum
+  {
+    /* SIGABRT is the same as in the generic implementation, but is
+       defined here because SIGIOT depends on it.  */
+    ALPHA_LINUX_SIGABRT = 6,
+    ALPHA_LINUX_SIGEMT = 7,
+    ALPHA_LINUX_SIGBUS = 10,
+    ALPHA_LINUX_SIGSYS = 12,
+    ALPHA_LINUX_SIGURG = 16,
+    ALPHA_LINUX_SIGSTOP = 17,
+    ALPHA_LINUX_SIGTSTP = 18,
+    ALPHA_LINUX_SIGCONT = 19,
+    ALPHA_LINUX_SIGCHLD = 20,
+    ALPHA_LINUX_SIGIO = 23,
+    ALPHA_LINUX_SIGINFO = 29,
+    ALPHA_LINUX_SIGUSR1 = 30,
+    ALPHA_LINUX_SIGUSR2 = 31,
+    ALPHA_LINUX_SIGPOLL = ALPHA_LINUX_SIGIO,
+    ALPHA_LINUX_SIGPWR = ALPHA_LINUX_SIGINFO,
+    ALPHA_LINUX_SIGIOT = ALPHA_LINUX_SIGABRT,
+  };

 
 /* Under GNU/Linux, signal handler invocations can be identified by
    the designated code sequence that is used to return from a signal
 
 /* Under GNU/Linux, signal handler invocations can be identified by
    the designated code sequence that is used to return from a signal


@@ -37,12 +64,11 @@
 
    This is somewhat complicated in that:
      (1) the expansion of the "mov" assembler macro has changed over
 
    This is somewhat complicated in that:
      (1) the expansion of the "mov" assembler macro has changed over

-         time, from "bis src,src,dst" to "bis zero,src,dst",
+        time, from "bis src,src,dst" to "bis zero,src,dst",

      (2) the kernel has changed from using "addq" to "lda" to load the
      (2) the kernel has changed from using "addq" to "lda" to load the

-         syscall number,
+        syscall number,

      (3) there is a "normal" sigreturn and an "rt" sigreturn which
      (3) there is a "normal" sigreturn and an "rt" sigreturn which

-         has a different stack layout.
-*/
+        has a different stack layout.  */

 
 static long
 alpha_linux_sigtramp_offset_1 (struct gdbarch *gdbarch, CORE_ADDR pc)
 
 static long
 alpha_linux_sigtramp_offset_1 (struct gdbarch *gdbarch, CORE_ADDR pc)


@@ -94,7 +120,7 @@ alpha_linux_sigtramp_offset (struct gdbarch *gdbarch, CORE_ADDR pc)
 
 static int
 alpha_linux_pc_in_sigtramp (struct gdbarch *gdbarch,
 
 static int
 alpha_linux_pc_in_sigtramp (struct gdbarch *gdbarch,

-                           CORE_ADDR pc, char *func_name)
+                           CORE_ADDR pc, const char *func_name)

 {
   return alpha_linux_sigtramp_offset (gdbarch, pc) >= 0;
 }
 {
   return alpha_linux_sigtramp_offset (gdbarch, pc) >= 0;
 }


@@ -118,10 +144,10 @@ alpha_linux_sigcontext_addr (struct frame_info *this_frame)
        struct rt_sigframe {
          struct siginfo info;
          struct ucontext uc;
        struct rt_sigframe {
          struct siginfo info;
          struct ucontext uc;

-        };
+       };
+
+       offsetof (struct rt_sigframe, uc.uc_mcontext);  */

 
 

-       offsetof (struct rt_sigframe, uc.uc_mcontext);
-  */

   if (alpha_read_insn (gdbarch, pc - off + 4) == 0x201f015f)
     return sp + 176;
 
   if (alpha_read_insn (gdbarch, pc - off + 4) == 0x201f015f)
     return sp + 176;
 


@@ -138,22 +164,28 @@ alpha_linux_supply_gregset (const struct regset *regset,
                            struct regcache *regcache,
                            int regnum, const void *gregs, size_t len)
 {
                            struct regcache *regcache,
                            int regnum, const void *gregs, size_t len)
 {

-  const gdb_byte *regs = gregs;
-  int i;
+  const gdb_byte *regs = (const gdb_byte *) gregs;
+

   gdb_assert (len >= 32 * 8);
   gdb_assert (len >= 32 * 8);

+  alpha_supply_int_regs (regcache, regnum, regs, regs + 31 * 8,
+                        len >= 33 * 8 ? regs + 32 * 8 : NULL);
+}

 
 

-  for (i = 0; i < ALPHA_ZERO_REGNUM; i++)
-    {
-      if (regnum == i || regnum == -1)
-       regcache_raw_supply (regcache, i, regs + i * 8);
-    }
+/* Collect register REGNUM from the register cache REGCACHE and store
+   it in the buffer specified by GREGS and LEN as described by the
+   general-purpose register set REGSET.  If REGNUM is -1, do this for
+   all registers in REGSET.  */

 
 

-  if (regnum == ALPHA_PC_REGNUM || regnum == -1)
-    regcache_raw_supply (regcache, ALPHA_PC_REGNUM, regs + 31 * 8);
+static void
+alpha_linux_collect_gregset (const struct regset *regset,
+                            const struct regcache *regcache,
+                            int regnum, void *gregs, size_t len)
+{
+  gdb_byte *regs = (gdb_byte *) gregs;

 
 

-  if (regnum == ALPHA_UNIQUE_REGNUM || regnum == -1)
-    regcache_raw_supply (regcache, ALPHA_UNIQUE_REGNUM,
-                        len >= 33 * 8 ? regs + 32 * 8 : NULL);
+  gdb_assert (len >= 32 * 8);
+  alpha_fill_int_regs (regcache, regnum, regs, regs + 31 * 8,
+                      len >= 33 * 8 ? regs + 32 * 8 : NULL);

 }
 
 /* Supply register REGNUM from the buffer specified by FPREGS and LEN
 }
 
 /* Supply register REGNUM from the buffer specified by FPREGS and LEN


@@ -165,52 +197,164 @@ alpha_linux_supply_fpregset (const struct regset *regset,
                             struct regcache *regcache,
                             int regnum, const void *fpregs, size_t len)
 {
                             struct regcache *regcache,
                             int regnum, const void *fpregs, size_t len)
 {

-  const gdb_byte *regs = fpregs;
-  int i;
+  const gdb_byte *regs = (const gdb_byte *) fpregs;
+

   gdb_assert (len >= 32 * 8);
   gdb_assert (len >= 32 * 8);

+  alpha_supply_fp_regs (regcache, regnum, regs, regs + 31 * 8);
+}

 
 

-  for (i = ALPHA_FP0_REGNUM; i < ALPHA_FP0_REGNUM + 31; i++)
-    {
-      if (regnum == i || regnum == -1)
-       regcache_raw_supply (regcache, i, regs + (i - ALPHA_FP0_REGNUM) * 8);
-    }
+/* Collect register REGNUM from the register cache REGCACHE and store
+   it in the buffer specified by FPREGS and LEN as described by the
+   general-purpose register set REGSET.  If REGNUM is -1, do this for
+   all registers in REGSET.  */

 
 

-  if (regnum == ALPHA_FPCR_REGNUM || regnum == -1)
-    regcache_raw_supply (regcache, ALPHA_FPCR_REGNUM, regs + 31 * 8);
+static void
+alpha_linux_collect_fpregset (const struct regset *regset,
+                             const struct regcache *regcache,
+                             int regnum, void *fpregs, size_t len)
+{
+  gdb_byte *regs = (gdb_byte *) fpregs;
+
+  gdb_assert (len >= 32 * 8);
+  alpha_fill_fp_regs (regcache, regnum, regs, regs + 31 * 8);

 }
 
 }
 

-static struct regset alpha_linux_gregset =
+static const struct regset alpha_linux_gregset =

 {
   NULL,
 {
   NULL,

-  alpha_linux_supply_gregset
+  alpha_linux_supply_gregset, alpha_linux_collect_gregset

 };
 
 };
 

-static struct regset alpha_linux_fpregset =
+static const struct regset alpha_linux_fpregset =

 {
   NULL,
 {
   NULL,

-  alpha_linux_supply_fpregset
+  alpha_linux_supply_fpregset, alpha_linux_collect_fpregset

 };
 
 };
 

-/* Return the appropriate register set for the core section identified
-   by SECT_NAME and SECT_SIZE.  */
+/* Iterate over core file register note sections.  */

 
 

-static const struct regset *
-alpha_linux_regset_from_core_section (struct gdbarch *gdbarch,
-                                     const char *sect_name, size_t sect_size)
+static void
+alpha_linux_iterate_over_regset_sections (struct gdbarch *gdbarch,
+                                         iterate_over_regset_sections_cb *cb,
+                                         void *cb_data,
+                                         const struct regcache *regcache)

 {
 {

-  if (strcmp (sect_name, ".reg") == 0 && sect_size >= 32 * 8)
-    return &alpha_linux_gregset;
+  cb (".reg", 32 * 8, 32 * 8, &alpha_linux_gregset, NULL, cb_data);
+  cb (".reg2", 32 * 8, 32 * 8, &alpha_linux_fpregset, NULL, cb_data);
+}
+
+/* Implementation of `gdbarch_gdb_signal_from_target', as defined in
+   gdbarch.h.  */
+
+static enum gdb_signal
+alpha_linux_gdb_signal_from_target (struct gdbarch *gdbarch,
+                                   int signal)
+{
+  switch (signal)
+    {
+    case ALPHA_LINUX_SIGEMT:
+      return GDB_SIGNAL_EMT;
+
+    case ALPHA_LINUX_SIGBUS:
+      return GDB_SIGNAL_BUS;
+
+    case ALPHA_LINUX_SIGSYS:
+      return GDB_SIGNAL_SYS;
+
+    case ALPHA_LINUX_SIGURG:
+      return GDB_SIGNAL_URG;
+
+    case ALPHA_LINUX_SIGSTOP:
+      return GDB_SIGNAL_STOP;
+
+    case ALPHA_LINUX_SIGTSTP:
+      return GDB_SIGNAL_TSTP;

 
 

-  if (strcmp (sect_name, ".reg2") == 0 && sect_size >= 32 * 8)
-    return &alpha_linux_fpregset;
+    case ALPHA_LINUX_SIGCONT:
+      return GDB_SIGNAL_CONT;

 
 

-  return NULL;
+    case ALPHA_LINUX_SIGCHLD:
+      return GDB_SIGNAL_CHLD;
+
+    /* No way to differentiate between SIGIO and SIGPOLL.
+       Therefore, we just handle the first one.  */
+    case ALPHA_LINUX_SIGIO:
+      return GDB_SIGNAL_IO;
+
+    /* No way to differentiate between SIGINFO and SIGPWR.
+       Therefore, we just handle the first one.  */
+    case ALPHA_LINUX_SIGINFO:
+      return GDB_SIGNAL_INFO;
+
+    case ALPHA_LINUX_SIGUSR1:
+      return GDB_SIGNAL_USR1;
+
+    case ALPHA_LINUX_SIGUSR2:
+      return GDB_SIGNAL_USR2;
+    }
+
+  return linux_gdb_signal_from_target (gdbarch, signal);
+}
+
+/* Implementation of `gdbarch_gdb_signal_to_target', as defined in
+   gdbarch.h.  */
+
+static int
+alpha_linux_gdb_signal_to_target (struct gdbarch *gdbarch,
+                                 enum gdb_signal signal)
+{
+  switch (signal)
+    {
+    case GDB_SIGNAL_EMT:
+      return ALPHA_LINUX_SIGEMT;
+
+    case GDB_SIGNAL_BUS:
+      return ALPHA_LINUX_SIGBUS;
+
+    case GDB_SIGNAL_SYS:
+      return ALPHA_LINUX_SIGSYS;
+
+    case GDB_SIGNAL_URG:
+      return ALPHA_LINUX_SIGURG;
+
+    case GDB_SIGNAL_STOP:
+      return ALPHA_LINUX_SIGSTOP;
+
+    case GDB_SIGNAL_TSTP:
+      return ALPHA_LINUX_SIGTSTP;
+
+    case GDB_SIGNAL_CONT:
+      return ALPHA_LINUX_SIGCONT;
+
+    case GDB_SIGNAL_CHLD:
+      return ALPHA_LINUX_SIGCHLD;
+
+    case GDB_SIGNAL_IO:
+      return ALPHA_LINUX_SIGIO;
+
+    case GDB_SIGNAL_INFO:
+      return ALPHA_LINUX_SIGINFO;
+
+    case GDB_SIGNAL_USR1:
+      return ALPHA_LINUX_SIGUSR1;
+
+    case GDB_SIGNAL_USR2:
+      return ALPHA_LINUX_SIGUSR2;
+
+    case GDB_SIGNAL_POLL:
+      return ALPHA_LINUX_SIGPOLL;
+
+    case GDB_SIGNAL_PWR:
+      return ALPHA_LINUX_SIGPWR;
+    }
+
+  return linux_gdb_signal_to_target (gdbarch, signal);

 }
 
 static void
 alpha_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
 {
 }
 
 static void
 alpha_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
 {

-  struct gdbarch_tdep *tdep;
+  linux_init_abi (info, gdbarch, 0);

 
   /* Hook into the DWARF CFI frame unwinder.  */
   alpha_dwarf2_init_abi (info, gdbarch);
 
   /* Hook into the DWARF CFI frame unwinder.  */
   alpha_dwarf2_init_abi (info, gdbarch);


@@ -218,7 +362,7 @@ alpha_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
   /* Hook into the MDEBUG frame unwinder.  */
   alpha_mdebug_init_abi (info, gdbarch);
 
   /* Hook into the MDEBUG frame unwinder.  */
   alpha_mdebug_init_abi (info, gdbarch);
 

-  tdep = gdbarch_tdep (gdbarch);
+  alpha_gdbarch_tdep *tdep = (alpha_gdbarch_tdep *) gdbarch_tdep (gdbarch);

   tdep->dynamic_sigtramp_offset = alpha_linux_sigtramp_offset;
   tdep->sigcontext_addr = alpha_linux_sigcontext_addr;
   tdep->pc_in_sigtramp = alpha_linux_pc_in_sigtramp;
   tdep->dynamic_sigtramp_offset = alpha_linux_sigtramp_offset;
   tdep->sigcontext_addr = alpha_linux_sigcontext_addr;
   tdep->pc_in_sigtramp = alpha_linux_pc_in_sigtramp;


@@ -228,22 +372,25 @@ alpha_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
   set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target);
 
   set_solib_svr4_fetch_link_map_offsets
   set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target);
 
   set_solib_svr4_fetch_link_map_offsets

-    (gdbarch, svr4_lp64_fetch_link_map_offsets);
+    (gdbarch, linux_lp64_fetch_link_map_offsets);

 
   /* Enable TLS support.  */
   set_gdbarch_fetch_tls_load_module_address (gdbarch,
 
   /* Enable TLS support.  */
   set_gdbarch_fetch_tls_load_module_address (gdbarch,

-                                             svr4_fetch_objfile_link_map);
+                                            svr4_fetch_objfile_link_map);

 
 

-  set_gdbarch_regset_from_core_section
-    (gdbarch, alpha_linux_regset_from_core_section);
-}
+  set_gdbarch_iterate_over_regset_sections
+    (gdbarch, alpha_linux_iterate_over_regset_sections);

 
 

-/* Provide a prototype to silence -Wmissing-prototypes.  */
-extern initialize_file_ftype _initialize_alpha_linux_tdep;
+  set_gdbarch_gdb_signal_from_target (gdbarch,
+                                     alpha_linux_gdb_signal_from_target);
+  set_gdbarch_gdb_signal_to_target (gdbarch,
+                                   alpha_linux_gdb_signal_to_target);
+}

 
 

+void _initialize_alpha_linux_tdep ();

 void
 void

-_initialize_alpha_linux_tdep (void)
+_initialize_alpha_linux_tdep ()

 {
   gdbarch_register_osabi (bfd_arch_alpha, 0, GDB_OSABI_LINUX,
 {
   gdbarch_register_osabi (bfd_arch_alpha, 0, GDB_OSABI_LINUX,

-                          alpha_linux_init_abi);
+                         alpha_linux_init_abi);

 }
 }