/* Target-dependent code for GNU/Linux running on the Fujitsu FR-V,
for GDB.
- Copyright 2004 Free Software Foundation, Inc.
+
+ Copyright (C) 2004-2014 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,
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 <http://www.gnu.org/licenses/>. */
#include "defs.h"
+#include "gdbcore.h"
#include "target.h"
#include "frame.h"
#include "osabi.h"
+#include "regcache.h"
#include "elf-bfd.h"
#include "elf/frv.h"
#include "frv-tdep.h"
#include "trad-frame.h"
#include "frame-unwind.h"
+#include "regset.h"
+#include <string.h>
+#include "linux-tdep.h"
/* Define the size (in bytes) of an FR-V instruction. */
static const int frv_instr_size = 4;
};
static int
-frv_linux_pc_in_sigtramp (CORE_ADDR pc, char *name)
+frv_linux_pc_in_sigtramp (struct gdbarch *gdbarch, CORE_ADDR pc,
+ const char *name)
{
- char buf[frv_instr_size];
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
+ gdb_byte buf[frv_instr_size];
LONGEST instr;
int retval = 0;
if (target_read_memory (pc, buf, sizeof buf) != 0)
return 0;
- instr = extract_unsigned_integer (buf, sizeof buf);
+ instr = extract_unsigned_integer (buf, sizeof buf, byte_order);
if (instr == 0x8efc0077) /* setlos #__NR_sigreturn, gr7 */
retval = NORMAL_SIGTRAMP;
- else if (instr -= 0x8efc00ad) /* setlos #__NR_rt_sigreturn, gr7 */
+ else if (instr == 0x8efc00ad) /* setlos #__NR_rt_sigreturn, gr7 */
retval = RT_SIGTRAMP;
else
return 0;
if (target_read_memory (pc + frv_instr_size, buf, sizeof buf) != 0)
return 0;
- instr = extract_unsigned_integer (buf, sizeof buf);
+ instr = extract_unsigned_integer (buf, sizeof buf, byte_order);
if (instr != 0xc0700000) /* tira gr0, 0 */
return 0;
return retval;
}
-/* Given NEXT_FRAME, "callee" frame of the sigtramp frame that we
+/* Given NEXT_FRAME, the "callee" frame of the sigtramp frame that we
wish to decode, and REGNO, one of the frv register numbers defined
in frv-tdep.h, return the address of the saved register (corresponding
to REGNO) in the sigtramp frame. Return -1 if the register is not
found in the sigtramp frame. The magic numbers in the code below
were computed by examining the following kernel structs:
- From arch/frvnommu/signal.c:
+ From arch/frv/kernel/signal.c:
struct sigframe
{
uint32_t retcode[2];
};
- From include/asm-frvnommu/ucontext.h:
+ From include/asm-frv/ucontext.h:
struct ucontext {
unsigned long uc_flags;
sigset_t uc_sigmask;
};
- From include/asm-frvnommu/sigcontext.h:
+ From include/asm-frv/signal.h:
+
+ typedef struct sigaltstack {
+ void *ss_sp;
+ int ss_flags;
+ size_t ss_size;
+ } stack_t;
+
+ From include/asm-frv/sigcontext.h:
struct sigcontext {
struct user_context sc_context;
unsigned long sc_oldmask;
} __attribute__((aligned(8)));
- From include/asm-frvnommu/registers.h:
+ From include/asm-frv/registers.h:
struct user_int_regs
{
unsigned long psr;
} __attribute__((aligned(8))); */
static LONGEST
-frv_linux_sigcontext_reg_addr (struct frame_info *next_frame, int regno,
+frv_linux_sigcontext_reg_addr (struct frame_info *this_frame, int regno,
CORE_ADDR *sc_addr_cache_ptr)
{
+ struct gdbarch *gdbarch = get_frame_arch (this_frame);
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
CORE_ADDR sc_addr;
if (sc_addr_cache_ptr && *sc_addr_cache_ptr)
else
{
CORE_ADDR pc, sp;
- char buf[4];
+ gdb_byte buf[4];
int tramp_type;
- pc = frame_pc_unwind (next_frame);
- tramp_type = frv_linux_pc_in_sigtramp (pc, 0);
+ pc = get_frame_pc (this_frame);
+ tramp_type = frv_linux_pc_in_sigtramp (gdbarch, pc, 0);
- frame_unwind_register (next_frame, sp_regnum, buf);
- sp = extract_unsigned_integer (buf, sizeof buf);
+ get_frame_register (this_frame, sp_regnum, buf);
+ sp = extract_unsigned_integer (buf, sizeof buf, byte_order);
if (tramp_type == NORMAL_SIGTRAMP)
{
else if (tramp_type == RT_SIGTRAMP)
{
/* For a realtime sigtramp frame, SP + 12 contains a pointer
- to the a ucontext struct. The ucontext struct contains
- a sigcontext struct starting 12 bytes in. */
+ to a ucontext struct. The ucontext struct contains a
+ sigcontext struct starting 24 bytes in. (The offset of
+ uc_mcontext within struct ucontext is derived as follows:
+ stack_t is a 12-byte struct and struct sigcontext is
+ 8-byte aligned. This gives an offset of 8 + 12 + 4 (for
+ padding) = 24.) */
if (target_read_memory (sp + 12, buf, sizeof buf) != 0)
{
warning (_("Can't read realtime sigtramp frame."));
return 0;
}
- sc_addr = extract_unsigned_integer (buf, sizeof buf);
- sc_addr += 12;
+ sc_addr = extract_unsigned_integer (buf, sizeof buf, byte_order);
+ sc_addr += 24;
}
else
- internal_error (__FILE__, __LINE__, "not a signal trampoline");
+ internal_error (__FILE__, __LINE__, _("not a signal trampoline"));
if (sc_addr_cache_ptr)
*sc_addr_cache_ptr = sc_addr;
sc_addr + 32 is syscallno, the syscall number or -1.
sc_addr + 36 is orig_gr8, the original syscall arg #1.
sc_addr + 40 is gner[0].
- sc_addr + 44 is gner[1]. */
+ sc_addr + 44 is gner[1]. */
case iacc0h_regnum :
return sc_addr + 48;
case iacc0l_regnum :
else if (first_fpr_regnum <= regno && regno <= last_fpr_regnum)
return sc_addr + 312 + 4 * (regno - first_fpr_regnum);
else
- return -1; /* not saved. */
+ return -1; /* not saved. */
}
}
/* Signal trampolines. */
static struct trad_frame_cache *
-frv_linux_sigtramp_frame_cache (struct frame_info *next_frame, void **this_cache)
+frv_linux_sigtramp_frame_cache (struct frame_info *this_frame,
+ void **this_cache)
{
+ struct gdbarch *gdbarch = get_frame_arch (this_frame);
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
struct trad_frame_cache *cache;
- struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
CORE_ADDR addr;
- char buf[4];
+ gdb_byte buf[4];
int regnum;
CORE_ADDR sc_addr_cache_val = 0;
struct frame_id this_id;
if (*this_cache)
return *this_cache;
- cache = trad_frame_cache_zalloc (next_frame);
+ cache = trad_frame_cache_zalloc (this_frame);
/* FIXME: cagney/2004-05-01: This is is long standing broken code.
The frame ID's code address should be the start-address of the
signal trampoline and not the current PC within that
trampoline. */
- frame_unwind_register (next_frame, sp_regnum, buf);
- this_id = frame_id_build (extract_unsigned_integer (buf, sizeof buf),
- frame_pc_unwind (next_frame));
+ get_frame_register (this_frame, sp_regnum, buf);
+ addr = extract_unsigned_integer (buf, sizeof buf, byte_order);
+ this_id = frame_id_build (addr, get_frame_pc (this_frame));
trad_frame_set_id (cache, this_id);
for (regnum = 0; regnum < frv_num_regs; regnum++)
{
- LONGEST reg_addr = frv_linux_sigcontext_reg_addr (next_frame, regnum,
+ LONGEST reg_addr = frv_linux_sigcontext_reg_addr (this_frame, regnum,
&sc_addr_cache_val);
if (reg_addr != -1)
trad_frame_set_reg_addr (cache, regnum, reg_addr);
}
static void
-frv_linux_sigtramp_frame_this_id (struct frame_info *next_frame, void **this_cache,
- struct frame_id *this_id)
+frv_linux_sigtramp_frame_this_id (struct frame_info *this_frame,
+ void **this_cache,
+ struct frame_id *this_id)
{
- struct trad_frame_cache *cache =
- frv_linux_sigtramp_frame_cache (next_frame, this_cache);
+ struct trad_frame_cache *cache
+ = frv_linux_sigtramp_frame_cache (this_frame, this_cache);
trad_frame_get_id (cache, this_id);
}
-static void
-frv_linux_sigtramp_frame_prev_register (struct frame_info *next_frame,
- void **this_cache,
- int regnum, int *optimizedp,
- enum lval_type *lvalp, CORE_ADDR *addrp,
- int *realnump, void *valuep)
+static struct value *
+frv_linux_sigtramp_frame_prev_register (struct frame_info *this_frame,
+ void **this_cache, int regnum)
{
/* Make sure we've initialized the cache. */
- struct trad_frame_cache *cache =
- frv_linux_sigtramp_frame_cache (next_frame, this_cache);
- trad_frame_get_register (cache, next_frame, regnum, optimizedp, lvalp,
- addrp, realnump, valuep);
+ struct trad_frame_cache *cache
+ = frv_linux_sigtramp_frame_cache (this_frame, this_cache);
+ return trad_frame_get_register (cache, this_frame, regnum);
+}
+
+static int
+frv_linux_sigtramp_frame_sniffer (const struct frame_unwind *self,
+ struct frame_info *this_frame,
+ void **this_cache)
+{
+ struct gdbarch *gdbarch = get_frame_arch (this_frame);
+ CORE_ADDR pc = get_frame_pc (this_frame);
+ const char *name;
+
+ find_pc_partial_function (pc, &name, NULL, NULL);
+ if (frv_linux_pc_in_sigtramp (gdbarch, pc, name))
+ return 1;
+
+ return 0;
}
static const struct frame_unwind frv_linux_sigtramp_frame_unwind =
{
SIGTRAMP_FRAME,
+ default_frame_unwind_stop_reason,
frv_linux_sigtramp_frame_this_id,
- frv_linux_sigtramp_frame_prev_register
+ frv_linux_sigtramp_frame_prev_register,
+ NULL,
+ frv_linux_sigtramp_frame_sniffer
+};
+\f
+/* The FRV kernel defines ELF_NGREG as 46. We add 2 in order to include
+ the loadmap addresses in the register set. (See below for more info.) */
+#define FRV_ELF_NGREG (46 + 2)
+typedef unsigned char frv_elf_greg_t[4];
+typedef struct { frv_elf_greg_t reg[FRV_ELF_NGREG]; } frv_elf_gregset_t;
+
+typedef unsigned char frv_elf_fpreg_t[4];
+typedef struct
+{
+ frv_elf_fpreg_t fr[64];
+ frv_elf_fpreg_t fner[2];
+ frv_elf_fpreg_t msr[2];
+ frv_elf_fpreg_t acc[8];
+ unsigned char accg[8];
+ frv_elf_fpreg_t fsr[1];
+} frv_elf_fpregset_t;
+
+/* Constants for accessing elements of frv_elf_gregset_t. */
+
+#define FRV_PT_PSR 0
+#define FRV_PT_ISR 1
+#define FRV_PT_CCR 2
+#define FRV_PT_CCCR 3
+#define FRV_PT_LR 4
+#define FRV_PT_LCR 5
+#define FRV_PT_PC 6
+#define FRV_PT_GNER0 10
+#define FRV_PT_GNER1 11
+#define FRV_PT_IACC0H 12
+#define FRV_PT_IACC0L 13
+
+/* Note: Only 32 of the GRs will be found in the corefile. */
+#define FRV_PT_GR(j) ( 14 + (j)) /* GRj for 0<=j<=63. */
+
+#define FRV_PT_TBR FRV_PT_GR(0) /* gr0 is always 0, so TBR is stuffed
+ there. */
+
+/* Technically, the loadmap addresses are not part of `pr_reg' as
+ found in the elf_prstatus struct. The fields which communicate the
+ loadmap address appear (by design) immediately after `pr_reg'
+ though, and the BFD function elf32_frv_grok_prstatus() has been
+ implemented to include these fields in the register section that it
+ extracts from the core file. So, for our purposes, they may be
+ viewed as registers. */
+
+#define FRV_PT_EXEC_FDPIC_LOADMAP 46
+#define FRV_PT_INTERP_FDPIC_LOADMAP 47
+
+
+/* Unpack an frv_elf_gregset_t into GDB's register cache. */
+
+static void
+frv_linux_supply_gregset (const struct regset *regset,
+ struct regcache *regcache,
+ int regnum, const void *gregs, size_t len)
+{
+ int regi;
+ char zerobuf[MAX_REGISTER_SIZE];
+ const frv_elf_gregset_t *gregsetp = gregs;
+
+ memset (zerobuf, 0, MAX_REGISTER_SIZE);
+
+ /* gr0 always contains 0. Also, the kernel passes the TBR value in
+ this slot. */
+ regcache_raw_supply (regcache, first_gpr_regnum, zerobuf);
+
+ for (regi = first_gpr_regnum + 1; regi <= last_gpr_regnum; regi++)
+ {
+ if (regi >= first_gpr_regnum + 32)
+ regcache_raw_supply (regcache, regi, zerobuf);
+ else
+ regcache_raw_supply (regcache, regi,
+ gregsetp->reg[FRV_PT_GR (regi
+ - first_gpr_regnum)]);
+ }
+
+ regcache_raw_supply (regcache, pc_regnum, gregsetp->reg[FRV_PT_PC]);
+ regcache_raw_supply (regcache, psr_regnum, gregsetp->reg[FRV_PT_PSR]);
+ regcache_raw_supply (regcache, ccr_regnum, gregsetp->reg[FRV_PT_CCR]);
+ regcache_raw_supply (regcache, cccr_regnum, gregsetp->reg[FRV_PT_CCCR]);
+ regcache_raw_supply (regcache, lr_regnum, gregsetp->reg[FRV_PT_LR]);
+ regcache_raw_supply (regcache, lcr_regnum, gregsetp->reg[FRV_PT_LCR]);
+ regcache_raw_supply (regcache, gner0_regnum, gregsetp->reg[FRV_PT_GNER0]);
+ regcache_raw_supply (regcache, gner1_regnum, gregsetp->reg[FRV_PT_GNER1]);
+ regcache_raw_supply (regcache, tbr_regnum, gregsetp->reg[FRV_PT_TBR]);
+ regcache_raw_supply (regcache, fdpic_loadmap_exec_regnum,
+ gregsetp->reg[FRV_PT_EXEC_FDPIC_LOADMAP]);
+ regcache_raw_supply (regcache, fdpic_loadmap_interp_regnum,
+ gregsetp->reg[FRV_PT_INTERP_FDPIC_LOADMAP]);
+}
+
+/* Unpack an frv_elf_fpregset_t into GDB's register cache. */
+
+static void
+frv_linux_supply_fpregset (const struct regset *regset,
+ struct regcache *regcache,
+ int regnum, const void *gregs, size_t len)
+{
+ int regi;
+ const frv_elf_fpregset_t *fpregsetp = gregs;
+
+ for (regi = first_fpr_regnum; regi <= last_fpr_regnum; regi++)
+ regcache_raw_supply (regcache, regi,
+ fpregsetp->fr[regi - first_fpr_regnum]);
+
+ regcache_raw_supply (regcache, fner0_regnum, fpregsetp->fner[0]);
+ regcache_raw_supply (regcache, fner1_regnum, fpregsetp->fner[1]);
+
+ regcache_raw_supply (regcache, msr0_regnum, fpregsetp->msr[0]);
+ regcache_raw_supply (regcache, msr1_regnum, fpregsetp->msr[1]);
+
+ for (regi = acc0_regnum; regi <= acc7_regnum; regi++)
+ regcache_raw_supply (regcache, regi, fpregsetp->acc[regi - acc0_regnum]);
+
+ regcache_raw_supply (regcache, accg0123_regnum, fpregsetp->accg);
+ regcache_raw_supply (regcache, accg4567_regnum, fpregsetp->accg + 4);
+
+ regcache_raw_supply (regcache, fsr0_regnum, fpregsetp->fsr[0]);
+}
+
+/* FRV Linux kernel register sets. */
+
+static const struct regset frv_linux_gregset =
+{
+ NULL,
+ frv_linux_supply_gregset
+};
+
+static const struct regset frv_linux_fpregset =
+{
+ NULL,
+ frv_linux_supply_fpregset
};
-static const struct frame_unwind *
-frv_linux_sigtramp_frame_sniffer (struct frame_info *next_frame)
+static const struct regset *
+frv_linux_regset_from_core_section (struct gdbarch *gdbarch,
+ const char *sect_name, size_t sect_size)
{
- CORE_ADDR pc = frame_pc_unwind (next_frame);
- char *name;
+ if (strcmp (sect_name, ".reg") == 0
+ && sect_size >= sizeof (frv_elf_gregset_t))
+ return &frv_linux_gregset;
- find_pc_partial_function (pc, &name, NULL, NULL);
- if (frv_linux_pc_in_sigtramp (pc, name))
- return &frv_linux_sigtramp_frame_unwind;
+ if (strcmp (sect_name, ".reg2") == 0
+ && sect_size >= sizeof (frv_elf_fpregset_t))
+ return &frv_linux_fpregset;
return NULL;
}
+\f
static void
frv_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
{
+ linux_init_abi (info, gdbarch);
+
/* Set the sigtramp frame sniffer. */
- frame_unwind_append_sniffer (gdbarch, frv_linux_sigtramp_frame_sniffer);
+ frame_unwind_append_unwinder (gdbarch, &frv_linux_sigtramp_frame_unwind);
+
+ set_gdbarch_regset_from_core_section (gdbarch,
+ frv_linux_regset_from_core_section);
}
static enum gdb_osabi
void
_initialize_frv_linux_tdep (void)
{
- gdbarch_register_osabi (bfd_arch_frv, 0, GDB_OSABI_LINUX, frv_linux_init_abi);
+ gdbarch_register_osabi (bfd_arch_frv, 0, GDB_OSABI_LINUX,
+ frv_linux_init_abi);
gdbarch_register_osabi_sniffer (bfd_arch_frv,
bfd_target_elf_flavour,
frv_linux_elf_osabi_sniffer);
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