/* Target-dependent code for GNU/Linux running on the Fujitsu FR-V,
for GDB.
- Copyright (C) 2004, 2006, 2007 Free Software Foundation, Inc.
+ Copyright (C) 2004-2019 Free Software Foundation, Inc.
This file is part of GDB.
#include "trad-frame.h"
#include "frame-unwind.h"
#include "regset.h"
-#include "gdb_string.h"
+#include "linux-tdep.h"
+#include "gdbarch.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;
} __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)
{
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.) */
+ 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 = extract_unsigned_integer (buf, sizeof buf, byte_order);
sc_addr += 24;
}
else
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);
+ 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;
+ return (struct trad_frame_cache *) *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, gdb_byte *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 const struct frame_unwind frv_linux_sigtramp_frame_unwind =
-{
- SIGTRAMP_FRAME,
- frv_linux_sigtramp_frame_this_id,
- frv_linux_sigtramp_frame_prev_register
-};
-
-static const struct frame_unwind *
-frv_linux_sigtramp_frame_sniffer (struct frame_info *next_frame)
+static int
+frv_linux_sigtramp_frame_sniffer (const struct frame_unwind *self,
+ struct frame_info *this_frame,
+ void **this_cache)
{
- CORE_ADDR pc = frame_pc_unwind (next_frame);
- char *name;
+ 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 (pc, name))
- return &frv_linux_sigtramp_frame_unwind;
+ if (frv_linux_pc_in_sigtramp (gdbarch, pc, name))
+ return 1;
- return NULL;
+ 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,
+ 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.) */
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
-
+/* Register maps. */
+
+static const struct regcache_map_entry frv_linux_gregmap[] =
+ {
+ { 1, psr_regnum, 4 },
+ { 1, REGCACHE_MAP_SKIP, 4 }, /* isr */
+ { 1, ccr_regnum, 4 },
+ { 1, cccr_regnum, 4 },
+ { 1, lr_regnum, 4 },
+ { 1, lcr_regnum, 4 },
+ { 1, pc_regnum, 4 },
+ { 1, REGCACHE_MAP_SKIP, 4 }, /* __status */
+ { 1, REGCACHE_MAP_SKIP, 4 }, /* syscallno */
+ { 1, REGCACHE_MAP_SKIP, 4 }, /* orig_gr8 */
+ { 1, gner0_regnum, 4 },
+ { 1, gner1_regnum, 4 },
+ { 1, REGCACHE_MAP_SKIP, 8 }, /* iacc0 */
+ { 1, tbr_regnum, 4 },
+ { 31, first_gpr_regnum + 1, 4 }, /* gr1 ... gr31 */
+
+ /* 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. */
+
+ { 1, fdpic_loadmap_exec_regnum, 4 },
+ { 1, fdpic_loadmap_interp_regnum, 4 },
+ { 0 }
+ };
+
+static const struct regcache_map_entry frv_linux_fpregmap[] =
+ {
+ { 64, first_fpr_regnum, 4 }, /* fr0 ... fr63 */
+ { 1, fner0_regnum, 4 },
+ { 1, fner1_regnum, 4 },
+ { 1, msr0_regnum, 4 },
+ { 1, msr1_regnum, 4 },
+ { 8, acc0_regnum, 4 }, /* acc0 ... acc7 */
+ { 1, accg0123_regnum, 4 },
+ { 1, accg4567_regnum, 4 },
+ { 1, fsr0_regnum, 4 },
+ { 0 }
+ };
/* Unpack an frv_elf_gregset_t into GDB's register cache. */
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_zeroed (first_gpr_regnum);
- regcache_raw_supply (regcache, fner0_regnum, fpregsetp->fner[0]);
- regcache_raw_supply (regcache, fner1_regnum, fpregsetp->fner[1]);
+ /* Fill gr32, ..., gr63 with zeros. */
+ for (regi = first_gpr_regnum + 32; regi <= last_gpr_regnum; regi++)
+ regcache->raw_supply_zeroed (regi);
- 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]);
+ regcache_supply_regset (regset, regcache, regnum, gregs, len);
}
/* FRV Linux kernel register sets. */
-static struct regset frv_linux_gregset =
+static const struct regset frv_linux_gregset =
{
- NULL,
- frv_linux_supply_gregset
+ frv_linux_gregmap,
+ frv_linux_supply_gregset, regcache_collect_regset
};
-static struct regset frv_linux_fpregset =
+static const struct regset frv_linux_fpregset =
{
- NULL,
- frv_linux_supply_fpregset
+ frv_linux_fpregmap,
+ regcache_supply_regset, regcache_collect_regset
};
-static const struct regset *
-frv_linux_regset_from_core_section (struct gdbarch *gdbarch,
- const char *sect_name, size_t sect_size)
+static void
+frv_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 >= sizeof (frv_elf_gregset_t))
- return &frv_linux_gregset;
-
- if (strcmp (sect_name, ".reg2") == 0
- && sect_size >= sizeof (frv_elf_fpregset_t))
- return &frv_linux_fpregset;
-
- return NULL;
+ cb (".reg", sizeof (frv_elf_gregset_t), sizeof (frv_elf_gregset_t),
+ &frv_linux_gregset, NULL, cb_data);
+ cb (".reg2", sizeof (frv_elf_fpregset_t), sizeof (frv_elf_fpregset_t),
+ &frv_linux_fpregset, NULL, cb_data);
}
\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);
- set_gdbarch_regset_from_core_section (gdbarch,
- frv_linux_regset_from_core_section);
+ frame_unwind_append_unwinder (gdbarch, &frv_linux_sigtramp_frame_unwind);
+
+ set_gdbarch_iterate_over_regset_sections
+ (gdbarch, frv_linux_iterate_over_regset_sections);
}
static enum gdb_osabi
return GDB_OSABI_UNKNOWN;
}
-/* Provide a prototype to silence -Wmissing-prototypes. */
-void _initialize_frv_linux_tdep (void);
-
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);