X-Git-Url: http://git.efficios.com/?a=blobdiff_plain;f=gdb%2Falpha-linux-tdep.c;h=33587b8dcfad3046d047c7fa505885b637eb5c34;hb=545e07dffdaf1b79497a866772caf0dd6e0a243f;hp=344195eee496e165fa1d9f9a3dd5dc489b655f7e;hpb=f561f0263002fbd950e66676a666ee5f46483841;p=deliverable%2Fbinutils-gdb.git
diff --git a/gdb/alpha-linux-tdep.c b/gdb/alpha-linux-tdep.c
index 344195eee4..33587b8dcf 100644
--- a/gdb/alpha-linux-tdep.c
+++ b/gdb/alpha-linux-tdep.c
@@ -1,11 +1,11 @@
/* Target-dependent code for GNU/Linux on Alpha.
- Copyright 2002, 2003 Free Software Foundation, Inc.
+ Copyright (C) 2002-2017 Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
@@ -14,17 +14,47 @@
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
+ along with this program. If not, see . */
#include "defs.h"
#include "frame.h"
-#include "gdb_assert.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"
+/* 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 ,
+ 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
handler. In particular, the return address of a signal handler
@@ -37,13 +67,12 @@
(2) the kernel has changed from using "addq" to "lda" to load the
syscall number,
(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 (CORE_ADDR pc)
+alpha_linux_sigtramp_offset_1 (struct gdbarch *gdbarch, CORE_ADDR pc)
{
- switch (alpha_read_insn (pc))
+ switch (alpha_read_insn (gdbarch, pc))
{
case 0x47de0410: /* bis $30,$30,$16 */
case 0x47fe0410: /* bis $31,$30,$16 */
@@ -63,7 +92,7 @@ alpha_linux_sigtramp_offset_1 (CORE_ADDR pc)
}
static LONGEST
-alpha_linux_sigtramp_offset (CORE_ADDR pc)
+alpha_linux_sigtramp_offset (struct gdbarch *gdbarch, CORE_ADDR pc)
{
long i, off;
@@ -71,7 +100,7 @@ alpha_linux_sigtramp_offset (CORE_ADDR pc)
return -1;
/* Guess where we might be in the sequence. */
- off = alpha_linux_sigtramp_offset_1 (pc);
+ off = alpha_linux_sigtramp_offset_1 (gdbarch, pc);
if (off < 0)
return -1;
@@ -81,7 +110,7 @@ alpha_linux_sigtramp_offset (CORE_ADDR pc)
{
if (i == off)
continue;
- if (alpha_linux_sigtramp_offset_1 (pc + i) != i)
+ if (alpha_linux_sigtramp_offset_1 (gdbarch, pc + i) != i)
return -1;
}
@@ -89,22 +118,24 @@ alpha_linux_sigtramp_offset (CORE_ADDR pc)
}
static int
-alpha_linux_pc_in_sigtramp (CORE_ADDR pc, char *func_name)
+alpha_linux_pc_in_sigtramp (struct gdbarch *gdbarch,
+ CORE_ADDR pc, const char *func_name)
{
- return alpha_linux_sigtramp_offset (pc) >= 0;
+ return alpha_linux_sigtramp_offset (gdbarch, pc) >= 0;
}
static CORE_ADDR
-alpha_linux_sigcontext_addr (struct frame_info *next_frame)
+alpha_linux_sigcontext_addr (struct frame_info *this_frame)
{
+ struct gdbarch *gdbarch = get_frame_arch (this_frame);
CORE_ADDR pc;
ULONGEST sp;
long off;
- pc = frame_pc_unwind (next_frame);
- frame_unwind_unsigned_register (next_frame, ALPHA_SP_REGNUM, &sp);
+ pc = get_frame_pc (this_frame);
+ sp = get_frame_register_unsigned (this_frame, ALPHA_SP_REGNUM);
- off = alpha_linux_sigtramp_offset (pc);
+ off = alpha_linux_sigtramp_offset (gdbarch, pc);
gdb_assert (off >= 0);
/* __NR_rt_sigreturn has a couple of structures on the stack. This is:
@@ -114,35 +145,252 @@ alpha_linux_sigcontext_addr (struct frame_info *next_frame)
struct ucontext uc;
};
- offsetof (struct rt_sigframe, uc.uc_mcontext);
- */
- if (alpha_read_insn (pc - off + 4) == 0x201f015f)
+ offsetof (struct rt_sigframe, uc.uc_mcontext); */
+
+ if (alpha_read_insn (gdbarch, pc - off + 4) == 0x201f015f)
return sp + 176;
/* __NR_sigreturn has the sigcontext structure at the top of the stack. */
return sp;
}
+/* Supply register REGNUM from the buffer specified by GREGS and LEN
+ in the general-purpose register set REGSET to register cache
+ REGCACHE. If REGNUM is -1, do this for all registers in REGSET. */
+
+static void
+alpha_linux_supply_gregset (const struct regset *regset,
+ struct regcache *regcache,
+ int regnum, const void *gregs, size_t len)
+{
+ const gdb_byte *regs = (const gdb_byte *) gregs;
+
+ gdb_assert (len >= 32 * 8);
+ alpha_supply_int_regs (regcache, regnum, regs, regs + 31 * 8,
+ len >= 33 * 8 ? regs + 32 * 8 : NULL);
+}
+
+/* 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. */
+
+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;
+
+ 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
+ in the floating-point register set REGSET to register cache
+ REGCACHE. If REGNUM is -1, do this for all registers in REGSET. */
+
+static void
+alpha_linux_supply_fpregset (const struct regset *regset,
+ struct regcache *regcache,
+ int regnum, const void *fpregs, size_t len)
+{
+ const gdb_byte *regs = (const gdb_byte *) fpregs;
+
+ gdb_assert (len >= 32 * 8);
+ alpha_supply_fp_regs (regcache, regnum, regs, regs + 31 * 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. */
+
+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 const struct regset alpha_linux_gregset =
+{
+ NULL,
+ alpha_linux_supply_gregset, alpha_linux_collect_gregset
+};
+
+static const struct regset alpha_linux_fpregset =
+{
+ NULL,
+ alpha_linux_supply_fpregset, alpha_linux_collect_fpregset
+};
+
+/* Iterate over core file register note sections. */
+
+static void
+alpha_linux_iterate_over_regset_sections (struct gdbarch *gdbarch,
+ iterate_over_regset_sections_cb *cb,
+ void *cb_data,
+ const struct regcache *regcache)
+{
+ cb (".reg", 32 * 8, &alpha_linux_gregset, NULL, cb_data);
+ cb (".reg2", 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;
+
+ case ALPHA_LINUX_SIGCONT:
+ return GDB_SIGNAL_CONT;
+
+ 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)
{
struct gdbarch_tdep *tdep;
+ linux_init_abi (info, gdbarch);
+
/* Hook into the DWARF CFI frame unwinder. */
alpha_dwarf2_init_abi (info, gdbarch);
/* Hook into the MDEBUG frame unwinder. */
alpha_mdebug_init_abi (info, gdbarch);
- set_gdbarch_deprecated_pc_in_sigtramp (gdbarch, alpha_linux_pc_in_sigtramp);
-
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->jb_pc = 2;
tdep->jb_elt_size = 8;
+
+ set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target);
+
+ set_solib_svr4_fetch_link_map_offsets
+ (gdbarch, svr4_lp64_fetch_link_map_offsets);
+
+ /* Enable TLS support. */
+ set_gdbarch_fetch_tls_load_module_address (gdbarch,
+ svr4_fetch_objfile_link_map);
+
+ set_gdbarch_iterate_over_regset_sections
+ (gdbarch, alpha_linux_iterate_over_regset_sections);
+
+ 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);
}
+/* Provide a prototype to silence -Wmissing-prototypes. */
+extern initialize_file_ftype _initialize_alpha_linux_tdep;
+
void
_initialize_alpha_linux_tdep (void)
{