mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-06 00:34:26 +08:00
4de283e4b5
Andreas Schwab and John Baldwin pointed out some bugs in the header sorting patch; and I noticed that the output was not correct when limited to a subset of files (a bug in my script). So, I'm reverting the patch. I may try again after fixing the issues pointed out. gdb/ChangeLog 2019-04-05 Tom Tromey <tom@tromey.com> Revert the header-sorting patch. * ft32-tdep.c: Revert. * frv-tdep.c: Revert. * frv-linux-tdep.c: Revert. * frame.c: Revert. * frame-unwind.c: Revert. * frame-base.c: Revert. * fork-child.c: Revert. * findvar.c: Revert. * findcmd.c: Revert. * filesystem.c: Revert. * filename-seen-cache.h: Revert. * filename-seen-cache.c: Revert. * fbsd-tdep.c: Revert. * fbsd-nat.h: Revert. * fbsd-nat.c: Revert. * f-valprint.c: Revert. * f-typeprint.c: Revert. * f-lang.c: Revert. * extension.h: Revert. * extension.c: Revert. * extension-priv.h: Revert. * expprint.c: Revert. * exec.h: Revert. * exec.c: Revert. * exceptions.c: Revert. * event-top.c: Revert. * event-loop.c: Revert. * eval.c: Revert. * elfread.c: Revert. * dwarf2read.h: Revert. * dwarf2read.c: Revert. * dwarf2loc.c: Revert. * dwarf2expr.h: Revert. * dwarf2expr.c: Revert. * dwarf2-frame.c: Revert. * dwarf2-frame-tailcall.c: Revert. * dwarf-index-write.h: Revert. * dwarf-index-write.c: Revert. * dwarf-index-common.c: Revert. * dwarf-index-cache.h: Revert. * dwarf-index-cache.c: Revert. * dummy-frame.c: Revert. * dtrace-probe.c: Revert. * disasm.h: Revert. * disasm.c: Revert. * disasm-selftests.c: Revert. * dictionary.c: Revert. * dicos-tdep.c: Revert. * demangle.c: Revert. * dcache.h: Revert. * dcache.c: Revert. * darwin-nat.h: Revert. * darwin-nat.c: Revert. * darwin-nat-info.c: Revert. * d-valprint.c: Revert. * d-namespace.c: Revert. * d-lang.c: Revert. * ctf.c: Revert. * csky-tdep.c: Revert. * csky-linux-tdep.c: Revert. * cris-tdep.c: Revert. * cris-linux-tdep.c: Revert. * cp-valprint.c: Revert. * cp-support.c: Revert. * cp-namespace.c: Revert. * cp-abi.c: Revert. * corelow.c: Revert. * corefile.c: Revert. * continuations.c: Revert. * completer.h: Revert. * completer.c: Revert. * complaints.c: Revert. * coffread.c: Revert. * coff-pe-read.c: Revert. * cli-out.h: Revert. * cli-out.c: Revert. * charset.c: Revert. * c-varobj.c: Revert. * c-valprint.c: Revert. * c-typeprint.c: Revert. * c-lang.c: Revert. * buildsym.c: Revert. * buildsym-legacy.c: Revert. * build-id.h: Revert. * build-id.c: Revert. * btrace.c: Revert. * bsd-uthread.c: Revert. * breakpoint.h: Revert. * breakpoint.c: Revert. * break-catch-throw.c: Revert. * break-catch-syscall.c: Revert. * break-catch-sig.c: Revert. * blockframe.c: Revert. * block.c: Revert. * bfin-tdep.c: Revert. * bfin-linux-tdep.c: Revert. * bfd-target.c: Revert. * bcache.c: Revert. * ax-general.c: Revert. * ax-gdb.h: Revert. * ax-gdb.c: Revert. * avr-tdep.c: Revert. * auxv.c: Revert. * auto-load.c: Revert. * arm-wince-tdep.c: Revert. * arm-tdep.c: Revert. * arm-symbian-tdep.c: Revert. * arm-pikeos-tdep.c: Revert. * arm-obsd-tdep.c: Revert. * arm-nbsd-tdep.c: Revert. * arm-nbsd-nat.c: Revert. * arm-linux-tdep.c: Revert. * arm-linux-nat.c: Revert. * arm-fbsd-tdep.c: Revert. * arm-fbsd-nat.c: Revert. * arm-bsd-tdep.c: Revert. * arch-utils.c: Revert. * arc-tdep.c: Revert. * arc-newlib-tdep.c: Revert. * annotate.h: Revert. * annotate.c: Revert. * amd64-windows-tdep.c: Revert. * amd64-windows-nat.c: Revert. * amd64-tdep.c: Revert. * amd64-sol2-tdep.c: Revert. * amd64-obsd-tdep.c: Revert. * amd64-obsd-nat.c: Revert. * amd64-nbsd-tdep.c: Revert. * amd64-nbsd-nat.c: Revert. * amd64-nat.c: Revert. * amd64-linux-tdep.c: Revert. * amd64-linux-nat.c: Revert. * amd64-fbsd-tdep.c: Revert. * amd64-fbsd-nat.c: Revert. * amd64-dicos-tdep.c: Revert. * amd64-darwin-tdep.c: Revert. * amd64-bsd-nat.c: Revert. * alpha-tdep.c: Revert. * alpha-obsd-tdep.c: Revert. * alpha-nbsd-tdep.c: Revert. * alpha-mdebug-tdep.c: Revert. * alpha-linux-tdep.c: Revert. * alpha-linux-nat.c: Revert. * alpha-bsd-tdep.c: Revert. * alpha-bsd-nat.c: Revert. * aix-thread.c: Revert. * agent.c: Revert. * addrmap.c: Revert. * ada-varobj.c: Revert. * ada-valprint.c: Revert. * ada-typeprint.c: Revert. * ada-tasks.c: Revert. * ada-lang.c: Revert. * aarch64-tdep.c: Revert. * aarch64-ravenscar-thread.c: Revert. * aarch64-newlib-tdep.c: Revert. * aarch64-linux-tdep.c: Revert. * aarch64-linux-nat.c: Revert. * aarch64-fbsd-tdep.c: Revert. * aarch64-fbsd-nat.c: Revert. * aarch32-linux-nat.c: Revert.
290 lines
8.1 KiB
C
290 lines
8.1 KiB
C
/* Target-dependent code for NetBSD/alpha.
|
||
|
||
Copyright (C) 2002-2019 Free Software Foundation, Inc.
|
||
|
||
Contributed by Wasabi Systems, 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 3 of the License, or
|
||
(at your option) any later version.
|
||
|
||
This program is distributed in the hope that it will be useful,
|
||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
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, see <http://www.gnu.org/licenses/>. */
|
||
|
||
#include "defs.h"
|
||
#include "frame.h"
|
||
#include "gdbcore.h"
|
||
#include "osabi.h"
|
||
#include "regcache.h"
|
||
#include "regset.h"
|
||
#include "value.h"
|
||
|
||
#include "alpha-tdep.h"
|
||
#include "alpha-bsd-tdep.h"
|
||
#include "nbsd-tdep.h"
|
||
#include "solib-svr4.h"
|
||
#include "target.h"
|
||
|
||
/* Core file support. */
|
||
|
||
/* Sizeof `struct reg' in <machine/reg.h>. */
|
||
#define ALPHANBSD_SIZEOF_GREGS (32 * 8)
|
||
|
||
/* Sizeof `struct fpreg' in <machine/reg.h. */
|
||
#define ALPHANBSD_SIZEOF_FPREGS ((32 * 8) + 8)
|
||
|
||
/* 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
|
||
alphanbsd_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;
|
||
int i;
|
||
|
||
gdb_assert (len >= ALPHANBSD_SIZEOF_FPREGS);
|
||
|
||
for (i = ALPHA_FP0_REGNUM; i < ALPHA_FP0_REGNUM + 31; i++)
|
||
{
|
||
if (regnum == i || regnum == -1)
|
||
regcache->raw_supply (i, regs + (i - ALPHA_FP0_REGNUM) * 8);
|
||
}
|
||
|
||
if (regnum == ALPHA_FPCR_REGNUM || regnum == -1)
|
||
regcache->raw_supply (ALPHA_FPCR_REGNUM, regs + 32 * 8);
|
||
}
|
||
|
||
/* 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
|
||
alphanbsd_aout_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;
|
||
int i;
|
||
|
||
/* Table to map a GDB register number to a trapframe register index. */
|
||
static const int regmap[] =
|
||
{
|
||
0, 1, 2, 3,
|
||
4, 5, 6, 7,
|
||
8, 9, 10, 11,
|
||
12, 13, 14, 15,
|
||
30, 31, 32, 16,
|
||
17, 18, 19, 20,
|
||
21, 22, 23, 24,
|
||
25, 29, 26
|
||
};
|
||
|
||
gdb_assert (len >= ALPHANBSD_SIZEOF_GREGS);
|
||
|
||
for (i = 0; i < ARRAY_SIZE(regmap); i++)
|
||
{
|
||
if (regnum == i || regnum == -1)
|
||
regcache->raw_supply (i, regs + regmap[i] * 8);
|
||
}
|
||
|
||
if (regnum == ALPHA_PC_REGNUM || regnum == -1)
|
||
regcache->raw_supply (ALPHA_PC_REGNUM, regs + 31 * 8);
|
||
|
||
if (len >= ALPHANBSD_SIZEOF_GREGS + ALPHANBSD_SIZEOF_FPREGS)
|
||
{
|
||
regs += ALPHANBSD_SIZEOF_GREGS;
|
||
len -= ALPHANBSD_SIZEOF_GREGS;
|
||
alphanbsd_supply_fpregset (regset, regcache, regnum, regs, len);
|
||
}
|
||
}
|
||
|
||
/* 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
|
||
alphanbsd_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;
|
||
int i;
|
||
|
||
if (len >= ALPHANBSD_SIZEOF_GREGS + ALPHANBSD_SIZEOF_FPREGS)
|
||
{
|
||
alphanbsd_aout_supply_gregset (regset, regcache, regnum, gregs, len);
|
||
return;
|
||
}
|
||
|
||
for (i = 0; i < ALPHA_ZERO_REGNUM; i++)
|
||
{
|
||
if (regnum == i || regnum == -1)
|
||
regcache->raw_supply (i, regs + i * 8);
|
||
}
|
||
|
||
if (regnum == ALPHA_PC_REGNUM || regnum == -1)
|
||
regcache->raw_supply (ALPHA_PC_REGNUM, regs + 31 * 8);
|
||
}
|
||
|
||
/* NetBSD/alpha register sets. */
|
||
|
||
static const struct regset alphanbsd_gregset =
|
||
{
|
||
NULL,
|
||
alphanbsd_supply_gregset,
|
||
NULL,
|
||
REGSET_VARIABLE_SIZE
|
||
};
|
||
|
||
static const struct regset alphanbsd_fpregset =
|
||
{
|
||
NULL,
|
||
alphanbsd_supply_fpregset
|
||
};
|
||
|
||
/* Iterate over supported core file register note sections. */
|
||
|
||
void
|
||
alphanbsd_iterate_over_regset_sections (struct gdbarch *gdbarch,
|
||
iterate_over_regset_sections_cb *cb,
|
||
void *cb_data,
|
||
const struct regcache *regcache)
|
||
{
|
||
cb (".reg", ALPHANBSD_SIZEOF_GREGS, ALPHANBSD_SIZEOF_GREGS,
|
||
&alphanbsd_gregset, NULL, cb_data);
|
||
cb (".reg2", ALPHANBSD_SIZEOF_FPREGS, ALPHANBSD_SIZEOF_FPREGS,
|
||
&alphanbsd_fpregset, NULL, cb_data);
|
||
}
|
||
|
||
|
||
/* Signal trampolines. */
|
||
|
||
/* Under NetBSD/alpha, 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 points to the
|
||
following code sequence:
|
||
|
||
ldq a0, 0(sp)
|
||
lda sp, 16(sp)
|
||
lda v0, 295(zero) # __sigreturn14
|
||
call_pal callsys
|
||
|
||
Each instruction has a unique encoding, so we simply attempt to match
|
||
the instruction the PC is pointing to with any of the above instructions.
|
||
If there is a hit, we know the offset to the start of the designated
|
||
sequence and can then check whether we really are executing in the
|
||
signal trampoline. If not, -1 is returned, otherwise the offset from the
|
||
start of the return sequence is returned. */
|
||
static const gdb_byte sigtramp_retcode[] =
|
||
{
|
||
0x00, 0x00, 0x1e, 0xa6, /* ldq a0, 0(sp) */
|
||
0x10, 0x00, 0xde, 0x23, /* lda sp, 16(sp) */
|
||
0x27, 0x01, 0x1f, 0x20, /* lda v0, 295(zero) */
|
||
0x83, 0x00, 0x00, 0x00, /* call_pal callsys */
|
||
};
|
||
#define RETCODE_NWORDS 4
|
||
#define RETCODE_SIZE (RETCODE_NWORDS * 4)
|
||
|
||
static LONGEST
|
||
alphanbsd_sigtramp_offset (struct gdbarch *gdbarch, CORE_ADDR pc)
|
||
{
|
||
gdb_byte ret[RETCODE_SIZE], w[4];
|
||
LONGEST off;
|
||
int i;
|
||
|
||
if (target_read_memory (pc, w, 4) != 0)
|
||
return -1;
|
||
|
||
for (i = 0; i < RETCODE_NWORDS; i++)
|
||
{
|
||
if (memcmp (w, sigtramp_retcode + (i * 4), 4) == 0)
|
||
break;
|
||
}
|
||
if (i == RETCODE_NWORDS)
|
||
return (-1);
|
||
|
||
off = i * 4;
|
||
pc -= off;
|
||
|
||
if (target_read_memory (pc, ret, sizeof (ret)) != 0)
|
||
return -1;
|
||
|
||
if (memcmp (ret, sigtramp_retcode, RETCODE_SIZE) == 0)
|
||
return off;
|
||
|
||
return -1;
|
||
}
|
||
|
||
static int
|
||
alphanbsd_pc_in_sigtramp (struct gdbarch *gdbarch,
|
||
CORE_ADDR pc, const char *func_name)
|
||
{
|
||
return (nbsd_pc_in_sigtramp (pc, func_name)
|
||
|| alphanbsd_sigtramp_offset (gdbarch, pc) >= 0);
|
||
}
|
||
|
||
static CORE_ADDR
|
||
alphanbsd_sigcontext_addr (struct frame_info *frame)
|
||
{
|
||
/* FIXME: This is not correct for all versions of NetBSD/alpha.
|
||
We will probably need to disassemble the trampoline to figure
|
||
out which trampoline frame type we have. */
|
||
if (!get_next_frame (frame))
|
||
return 0;
|
||
return get_frame_base (get_next_frame (frame));
|
||
}
|
||
|
||
|
||
static void
|
||
alphanbsd_init_abi (struct gdbarch_info info,
|
||
struct gdbarch *gdbarch)
|
||
{
|
||
struct gdbarch_tdep *tdep = gdbarch_tdep (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);
|
||
|
||
/* NetBSD/alpha does not provide single step support via ptrace(2); we
|
||
must use software single-stepping. */
|
||
set_gdbarch_software_single_step (gdbarch, alpha_software_single_step);
|
||
|
||
/* NetBSD/alpha has SVR4-style shared libraries. */
|
||
set_solib_svr4_fetch_link_map_offsets
|
||
(gdbarch, svr4_lp64_fetch_link_map_offsets);
|
||
|
||
tdep->dynamic_sigtramp_offset = alphanbsd_sigtramp_offset;
|
||
tdep->pc_in_sigtramp = alphanbsd_pc_in_sigtramp;
|
||
tdep->sigcontext_addr = alphanbsd_sigcontext_addr;
|
||
|
||
tdep->jb_pc = 2;
|
||
tdep->jb_elt_size = 8;
|
||
|
||
set_gdbarch_iterate_over_regset_sections
|
||
(gdbarch, alphanbsd_iterate_over_regset_sections);
|
||
}
|
||
|
||
|
||
void
|
||
_initialize_alphanbsd_tdep (void)
|
||
{
|
||
/* Even though NetBSD/alpha used ELF since day one, it used the
|
||
traditional a.out-style core dump format before NetBSD 1.6, but
|
||
we don't support those. */
|
||
gdbarch_register_osabi (bfd_arch_alpha, 0, GDB_OSABI_NETBSD,
|
||
alphanbsd_init_abi);
|
||
}
|