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1677 lines (1490 loc) · 53.2 KB
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/* Target-dependent code for GNU/Linux AArch64.
Copyright (C) 2009-2019 Free Software Foundation, Inc.
Contributed by ARM Ltd.
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 "gdbarch.h"
#include "arch-utils.h"
#include "glibc-tdep.h"
#include "linux-tdep.h"
#include "aarch64-tdep.h"
#include "aarch64-linux-tdep.h"
#include "osabi.h"
#include "solib-svr4.h"
#include "symtab.h"
#include "tramp-frame.h"
#include "trad-frame.h"
#include "inferior.h"
#include "regcache.h"
#include "regset.h"
#include "cli/cli-utils.h"
#include "stap-probe.h"
#include "parser-defs.h"
#include "user-regs.h"
#include "xml-syscall.h"
#include <ctype.h>
#include "record-full.h"
#include "linux-record.h"
#include "auxv.h"
#include "elf/common.h"
/* Signal frame handling.
+------------+ ^
| saved lr | |
+->| saved fp |--+
| | |
| | |
| +------------+
| | saved lr |
+--| saved fp |
^ | |
| | |
| +------------+
^ | |
| | signal |
| | | SIGTRAMP_FRAME (struct rt_sigframe)
| | saved regs |
+--| saved sp |--> interrupted_sp
| | saved pc |--> interrupted_pc
| | |
| +------------+
| | saved lr |--> default_restorer (movz x8, NR_sys_rt_sigreturn; svc 0)
+--| saved fp |<- FP
| | NORMAL_FRAME
| |<- SP
+------------+
On signal delivery, the kernel will create a signal handler stack
frame and setup the return address in LR to point at restorer stub.
The signal stack frame is defined by:
struct rt_sigframe
{
siginfo_t info;
struct ucontext uc;
};
The ucontext has the following form:
struct ucontext
{
unsigned long uc_flags;
struct ucontext *uc_link;
stack_t uc_stack;
sigset_t uc_sigmask;
struct sigcontext uc_mcontext;
};
struct sigcontext
{
unsigned long fault_address;
unsigned long regs[31];
unsigned long sp; / * 31 * /
unsigned long pc; / * 32 * /
unsigned long pstate; / * 33 * /
__u8 __reserved[4096]
};
The reserved space in sigcontext contains additional structures, each starting
with a aarch64_ctx, which specifies a unique identifier and the total size of
the structure. The final structure in reserved will start will a null
aarch64_ctx. The penultimate entry in reserved may be a extra_context which
then points to a further block of reserved space.
struct aarch64_ctx {
u32 magic;
u32 size;
};
The restorer stub will always have the form:
d28015a8 movz x8, #0xad
d4000001 svc #0x0
This is a system call sys_rt_sigreturn.
We detect signal frames by snooping the return code for the restorer
instruction sequence.
The handler then needs to recover the saved register set from
ucontext.uc_mcontext. */
/* These magic numbers need to reflect the layout of the kernel
defined struct rt_sigframe and ucontext. */
#define AARCH64_SIGCONTEXT_REG_SIZE 8
#define AARCH64_RT_SIGFRAME_UCONTEXT_OFFSET 128
#define AARCH64_UCONTEXT_SIGCONTEXT_OFFSET 176
#define AARCH64_SIGCONTEXT_XO_OFFSET 8
#define AARCH64_SIGCONTEXT_RESERVED_OFFSET 288
#define AARCH64_SIGCONTEXT_RESERVED_SIZE 4096
/* Unique identifiers that may be used for aarch64_ctx.magic. */
#define AARCH64_EXTRA_MAGIC 0x45585401
#define AARCH64_FPSIMD_MAGIC 0x46508001
#define AARCH64_SVE_MAGIC 0x53564501
/* Defines for the extra_context that follows an AARCH64_EXTRA_MAGIC. */
#define AARCH64_EXTRA_DATAP_OFFSET 8
/* Defines for the fpsimd that follows an AARCH64_FPSIMD_MAGIC. */
#define AARCH64_FPSIMD_FPSR_OFFSET 8
#define AARCH64_FPSIMD_FPCR_OFFSET 12
#define AARCH64_FPSIMD_V0_OFFSET 16
#define AARCH64_FPSIMD_VREG_SIZE 16
/* Defines for the sve structure that follows an AARCH64_SVE_MAGIC. */
#define AARCH64_SVE_CONTEXT_VL_OFFSET 8
#define AARCH64_SVE_CONTEXT_REGS_OFFSET 16
#define AARCH64_SVE_CONTEXT_P_REGS_OFFSET(vq) (32 * vq * 16)
#define AARCH64_SVE_CONTEXT_FFR_OFFSET(vq) \
(AARCH64_SVE_CONTEXT_P_REGS_OFFSET (vq) + (16 * vq * 2))
#define AARCH64_SVE_CONTEXT_SIZE(vq) \
(AARCH64_SVE_CONTEXT_FFR_OFFSET (vq) + (vq * 2))
/* Read an aarch64_ctx, returning the magic value, and setting *SIZE to the
size, or return 0 on error. */
static uint32_t
read_aarch64_ctx (CORE_ADDR ctx_addr, enum bfd_endian byte_order,
uint32_t *size)
{
uint32_t magic = 0;
gdb_byte buf[4];
if (target_read_memory (ctx_addr, buf, 4) != 0)
return 0;
magic = extract_unsigned_integer (buf, 4, byte_order);
if (target_read_memory (ctx_addr + 4, buf, 4) != 0)
return 0;
*size = extract_unsigned_integer (buf, 4, byte_order);
return magic;
}
/* Implement the "init" method of struct tramp_frame. */
static void
aarch64_linux_sigframe_init (const struct tramp_frame *self,
struct frame_info *this_frame,
struct trad_frame_cache *this_cache,
CORE_ADDR func)
{
struct gdbarch *gdbarch = get_frame_arch (this_frame);
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
CORE_ADDR sp = get_frame_register_unsigned (this_frame, AARCH64_SP_REGNUM);
CORE_ADDR sigcontext_addr = (sp + AARCH64_RT_SIGFRAME_UCONTEXT_OFFSET
+ AARCH64_UCONTEXT_SIGCONTEXT_OFFSET );
CORE_ADDR section = sigcontext_addr + AARCH64_SIGCONTEXT_RESERVED_OFFSET;
CORE_ADDR section_end = section + AARCH64_SIGCONTEXT_RESERVED_SIZE;
CORE_ADDR fpsimd = 0;
CORE_ADDR sve_regs = 0;
uint32_t size, magic;
bool extra_found = false;
int num_regs = gdbarch_num_regs (gdbarch);
/* Read in the integer registers. */
for (int i = 0; i < 31; i++)
{
trad_frame_set_reg_addr (this_cache,
AARCH64_X0_REGNUM + i,
sigcontext_addr + AARCH64_SIGCONTEXT_XO_OFFSET
+ i * AARCH64_SIGCONTEXT_REG_SIZE);
}
trad_frame_set_reg_addr (this_cache, AARCH64_SP_REGNUM,
sigcontext_addr + AARCH64_SIGCONTEXT_XO_OFFSET
+ 31 * AARCH64_SIGCONTEXT_REG_SIZE);
trad_frame_set_reg_addr (this_cache, AARCH64_PC_REGNUM,
sigcontext_addr + AARCH64_SIGCONTEXT_XO_OFFSET
+ 32 * AARCH64_SIGCONTEXT_REG_SIZE);
/* Search for the FP and SVE sections, stopping at null. */
while ((magic = read_aarch64_ctx (section, byte_order, &size)) != 0
&& size != 0)
{
switch (magic)
{
case AARCH64_FPSIMD_MAGIC:
fpsimd = section;
section += size;
break;
case AARCH64_SVE_MAGIC:
{
/* Check if the section is followed by a full SVE dump, and set
sve_regs if it is. */
gdb_byte buf[4];
uint16_t vq;
if (!tdep->has_sve ())
break;
if (target_read_memory (section + AARCH64_SVE_CONTEXT_VL_OFFSET,
buf, 2) != 0)
{
section += size;
break;
}
vq = sve_vq_from_vl (extract_unsigned_integer (buf, 2, byte_order));
if (vq != tdep->vq)
error (_("Invalid vector length in signal frame %d vs %s."), vq,
pulongest (tdep->vq));
if (size >= AARCH64_SVE_CONTEXT_SIZE (vq))
sve_regs = section + AARCH64_SVE_CONTEXT_REGS_OFFSET;
section += size;
break;
}
case AARCH64_EXTRA_MAGIC:
{
/* Extra is always the last valid section in reserved and points to
an additional block of memory filled with more sections. Reset
the address to the extra section and continue looking for more
structures. */
gdb_byte buf[8];
if (target_read_memory (section + AARCH64_EXTRA_DATAP_OFFSET,
buf, 8) != 0)
{
section += size;
break;
}
section = extract_unsigned_integer (buf, 8, byte_order);
extra_found = true;
break;
}
default:
section += size;
break;
}
/* Prevent searching past the end of the reserved section. The extra
section does not have a hard coded limit - we have to rely on it ending
with nulls. */
if (!extra_found && section > section_end)
break;
}
if (sve_regs != 0)
{
CORE_ADDR offset;
for (int i = 0; i < 32; i++)
{
offset = sve_regs + (i * tdep->vq * 16);
trad_frame_set_reg_addr (this_cache, AARCH64_SVE_Z0_REGNUM + i,
offset);
trad_frame_set_reg_addr (this_cache,
num_regs + AARCH64_SVE_V0_REGNUM + i,
offset);
trad_frame_set_reg_addr (this_cache, num_regs + AARCH64_Q0_REGNUM + i,
offset);
trad_frame_set_reg_addr (this_cache, num_regs + AARCH64_D0_REGNUM + i,
offset);
trad_frame_set_reg_addr (this_cache, num_regs + AARCH64_S0_REGNUM + i,
offset);
trad_frame_set_reg_addr (this_cache, num_regs + AARCH64_H0_REGNUM + i,
offset);
trad_frame_set_reg_addr (this_cache, num_regs + AARCH64_B0_REGNUM + i,
offset);
}
offset = sve_regs + AARCH64_SVE_CONTEXT_P_REGS_OFFSET (tdep->vq);
for (int i = 0; i < 16; i++)
trad_frame_set_reg_addr (this_cache, AARCH64_SVE_P0_REGNUM + i,
offset + (i * tdep->vq * 2));
offset = sve_regs + AARCH64_SVE_CONTEXT_FFR_OFFSET (tdep->vq);
trad_frame_set_reg_addr (this_cache, AARCH64_SVE_FFR_REGNUM, offset);
}
if (fpsimd != 0)
{
trad_frame_set_reg_addr (this_cache, AARCH64_FPSR_REGNUM,
fpsimd + AARCH64_FPSIMD_FPSR_OFFSET);
trad_frame_set_reg_addr (this_cache, AARCH64_FPCR_REGNUM,
fpsimd + AARCH64_FPSIMD_FPCR_OFFSET);
/* If there was no SVE section then set up the V registers. */
if (sve_regs == 0)
for (int i = 0; i < 32; i++)
{
CORE_ADDR offset = (fpsimd + AARCH64_FPSIMD_V0_OFFSET
+ (i * AARCH64_FPSIMD_VREG_SIZE));
trad_frame_set_reg_addr (this_cache, AARCH64_V0_REGNUM + i, offset);
trad_frame_set_reg_addr (this_cache,
num_regs + AARCH64_Q0_REGNUM + i, offset);
trad_frame_set_reg_addr (this_cache,
num_regs + AARCH64_D0_REGNUM + i, offset);
trad_frame_set_reg_addr (this_cache,
num_regs + AARCH64_S0_REGNUM + i, offset);
trad_frame_set_reg_addr (this_cache,
num_regs + AARCH64_H0_REGNUM + i, offset);
trad_frame_set_reg_addr (this_cache,
num_regs + AARCH64_B0_REGNUM + i, offset);
if (tdep->has_sve ())
trad_frame_set_reg_addr (this_cache,
num_regs + AARCH64_SVE_V0_REGNUM + i,
offset);
}
}
trad_frame_set_id (this_cache, frame_id_build (sp, func));
}
static const struct tramp_frame aarch64_linux_rt_sigframe =
{
SIGTRAMP_FRAME,
4,
{
/* movz x8, 0x8b (S=1,o=10,h=0,i=0x8b,r=8)
Soo1 0010 1hhi iiii iiii iiii iiir rrrr */
{0xd2801168, ULONGEST_MAX},
/* svc 0x0 (o=0, l=1)
1101 0100 oooi iiii iiii iiii iii0 00ll */
{0xd4000001, ULONGEST_MAX},
{TRAMP_SENTINEL_INSN, ULONGEST_MAX}
},
aarch64_linux_sigframe_init
};
/* Register maps. */
static const struct regcache_map_entry aarch64_linux_gregmap[] =
{
{ 31, AARCH64_X0_REGNUM, 8 }, /* x0 ... x30 */
{ 1, AARCH64_SP_REGNUM, 8 },
{ 1, AARCH64_PC_REGNUM, 8 },
{ 1, AARCH64_CPSR_REGNUM, 8 },
{ 0 }
};
static const struct regcache_map_entry aarch64_linux_fpregmap[] =
{
{ 32, AARCH64_V0_REGNUM, 16 }, /* v0 ... v31 */
{ 1, AARCH64_FPSR_REGNUM, 4 },
{ 1, AARCH64_FPCR_REGNUM, 4 },
{ 0 }
};
/* Register set definitions. */
const struct regset aarch64_linux_gregset =
{
aarch64_linux_gregmap,
regcache_supply_regset, regcache_collect_regset
};
const struct regset aarch64_linux_fpregset =
{
aarch64_linux_fpregmap,
regcache_supply_regset, regcache_collect_regset
};
/* The fields in an SVE header at the start of a SVE regset. */
#define SVE_HEADER_SIZE_LENGTH 4
#define SVE_HEADER_MAX_SIZE_LENGTH 4
#define SVE_HEADER_VL_LENGTH 2
#define SVE_HEADER_MAX_VL_LENGTH 2
#define SVE_HEADER_FLAGS_LENGTH 2
#define SVE_HEADER_RESERVED_LENGTH 2
#define SVE_HEADER_SIZE_OFFSET 0
#define SVE_HEADER_MAX_SIZE_OFFSET \
(SVE_HEADER_SIZE_OFFSET + SVE_HEADER_SIZE_LENGTH)
#define SVE_HEADER_VL_OFFSET \
(SVE_HEADER_MAX_SIZE_OFFSET + SVE_HEADER_MAX_SIZE_LENGTH)
#define SVE_HEADER_MAX_VL_OFFSET \
(SVE_HEADER_VL_OFFSET + SVE_HEADER_VL_LENGTH)
#define SVE_HEADER_FLAGS_OFFSET \
(SVE_HEADER_MAX_VL_OFFSET + SVE_HEADER_MAX_VL_LENGTH)
#define SVE_HEADER_RESERVED_OFFSET \
(SVE_HEADER_FLAGS_OFFSET + SVE_HEADER_FLAGS_LENGTH)
#define SVE_HEADER_SIZE \
(SVE_HEADER_RESERVED_OFFSET + SVE_HEADER_RESERVED_LENGTH)
#define SVE_HEADER_FLAG_SVE 1
/* Get VQ value from SVE section in the core dump. */
static uint64_t
aarch64_linux_core_read_vq (struct gdbarch *gdbarch, bfd *abfd)
{
gdb_byte header[SVE_HEADER_SIZE];
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
asection *sve_section = bfd_get_section_by_name (abfd, ".reg-aarch-sve");
if (sve_section == nullptr)
{
/* No SVE state. */
return 0;
}
size_t size = bfd_section_size (abfd, sve_section);
/* Check extended state size. */
if (size < SVE_HEADER_SIZE)
{
warning (_("'.reg-aarch-sve' section in core file too small."));
return 0;
}
if (!bfd_get_section_contents (abfd, sve_section, header, 0, SVE_HEADER_SIZE))
{
warning (_("Couldn't read sve header from "
"'.reg-aarch-sve' section in core file."));
return 0;
}
uint64_t vl = extract_unsigned_integer (header + SVE_HEADER_VL_OFFSET,
SVE_HEADER_VL_LENGTH, byte_order);
uint64_t vq = sve_vq_from_vl (vl);
if (vq > AARCH64_MAX_SVE_VQ)
{
warning (_("SVE Vector length in core file not supported by this version"
" of GDB. (VQ=%s)"), pulongest (vq));
return 0;
}
else if (vq == 0)
{
warning (_("SVE Vector length in core file is invalid. (VQ=%s"),
pulongest (vq));
return 0;
}
return vq;
}
/* Supply register REGNUM from BUF to REGCACHE, using the register map
in REGSET. If REGNUM is -1, do this for all registers in REGSET.
If BUF is NULL, set the registers to "unavailable" status. */
static void
aarch64_linux_supply_sve_regset (const struct regset *regset,
struct regcache *regcache,
int regnum, const void *buf, size_t size)
{
gdb_byte *header = (gdb_byte *) buf;
struct gdbarch *gdbarch = regcache->arch ();
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
if (buf == nullptr)
return regcache->supply_regset (regset, regnum, nullptr, size);
gdb_assert (size > SVE_HEADER_SIZE);
/* BUF contains an SVE header followed by a register dump of either the
passed in SVE regset or a NEON fpregset. */
/* Extract required fields from the header. */
ULONGEST vl = extract_unsigned_integer (header + SVE_HEADER_VL_OFFSET,
SVE_HEADER_VL_LENGTH, byte_order);
uint16_t flags = extract_unsigned_integer (header + SVE_HEADER_FLAGS_OFFSET,
SVE_HEADER_FLAGS_LENGTH,
byte_order);
if (regnum == -1 || regnum == AARCH64_SVE_VG_REGNUM)
{
gdb_byte vg_target[8];
store_integer ((gdb_byte *)&vg_target, sizeof (uint64_t), byte_order,
sve_vg_from_vl (vl));
regcache->raw_supply (AARCH64_SVE_VG_REGNUM, &vg_target);
}
if (flags & SVE_HEADER_FLAG_SVE)
{
/* Register dump is a SVE structure. */
regcache->supply_regset (regset, regnum,
(gdb_byte *) buf + SVE_HEADER_SIZE,
size - SVE_HEADER_SIZE);
}
else
{
/* Register dump is a fpsimd structure. First clear the SVE
registers. */
for (int i = 0; i < AARCH64_SVE_Z_REGS_NUM; i++)
regcache->raw_supply_zeroed (AARCH64_SVE_Z0_REGNUM + i);
for (int i = 0; i < AARCH64_SVE_P_REGS_NUM; i++)
regcache->raw_supply_zeroed (AARCH64_SVE_P0_REGNUM + i);
regcache->raw_supply_zeroed (AARCH64_SVE_FFR_REGNUM);
/* Then supply the fpsimd registers. */
regcache->supply_regset (&aarch64_linux_fpregset, regnum,
(gdb_byte *) buf + SVE_HEADER_SIZE,
size - SVE_HEADER_SIZE);
}
}
/* Collect register REGNUM from REGCACHE to BUF, using the register
map in REGSET. If REGNUM is -1, do this for all registers in
REGSET. */
static void
aarch64_linux_collect_sve_regset (const struct regset *regset,
const struct regcache *regcache,
int regnum, void *buf, size_t size)
{
gdb_byte *header = (gdb_byte *) buf;
struct gdbarch *gdbarch = regcache->arch ();
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
uint64_t vq = gdbarch_tdep (gdbarch)->vq;
gdb_assert (buf != NULL);
gdb_assert (size > SVE_HEADER_SIZE);
/* BUF starts with a SVE header prior to the register dump. */
store_unsigned_integer (header + SVE_HEADER_SIZE_OFFSET,
SVE_HEADER_SIZE_LENGTH, byte_order, size);
store_unsigned_integer (header + SVE_HEADER_MAX_SIZE_OFFSET,
SVE_HEADER_MAX_SIZE_LENGTH, byte_order, size);
store_unsigned_integer (header + SVE_HEADER_VL_OFFSET, SVE_HEADER_VL_LENGTH,
byte_order, sve_vl_from_vq (vq));
store_unsigned_integer (header + SVE_HEADER_MAX_VL_OFFSET,
SVE_HEADER_MAX_VL_LENGTH, byte_order,
sve_vl_from_vq (vq));
store_unsigned_integer (header + SVE_HEADER_FLAGS_OFFSET,
SVE_HEADER_FLAGS_LENGTH, byte_order,
SVE_HEADER_FLAG_SVE);
store_unsigned_integer (header + SVE_HEADER_RESERVED_OFFSET,
SVE_HEADER_RESERVED_LENGTH, byte_order, 0);
/* The SVE register dump follows. */
regcache->collect_regset (regset, regnum, (gdb_byte *) buf + SVE_HEADER_SIZE,
size - SVE_HEADER_SIZE);
}
/* Implement the "regset_from_core_section" gdbarch method. */
static void
aarch64_linux_iterate_over_regset_sections (struct gdbarch *gdbarch,
iterate_over_regset_sections_cb *cb,
void *cb_data,
const struct regcache *regcache)
{
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
cb (".reg", AARCH64_LINUX_SIZEOF_GREGSET, AARCH64_LINUX_SIZEOF_GREGSET,
&aarch64_linux_gregset, NULL, cb_data);
if (tdep->has_sve ())
{
/* Create this on the fly in order to handle vector register sizes. */
const struct regcache_map_entry sve_regmap[] =
{
{ 32, AARCH64_SVE_Z0_REGNUM, (int) (tdep->vq * 16) },
{ 16, AARCH64_SVE_P0_REGNUM, (int) (tdep->vq * 16 / 8) },
{ 1, AARCH64_SVE_FFR_REGNUM, 4 },
{ 1, AARCH64_FPSR_REGNUM, 4 },
{ 1, AARCH64_FPCR_REGNUM, 4 },
{ 0 }
};
const struct regset aarch64_linux_sve_regset =
{
sve_regmap,
aarch64_linux_supply_sve_regset, aarch64_linux_collect_sve_regset,
REGSET_VARIABLE_SIZE
};
cb (".reg-aarch-sve",
SVE_HEADER_SIZE + regcache_map_entry_size (aarch64_linux_fpregmap),
SVE_HEADER_SIZE + regcache_map_entry_size (sve_regmap),
&aarch64_linux_sve_regset, "SVE registers", cb_data);
}
else
cb (".reg2", AARCH64_LINUX_SIZEOF_FPREGSET, AARCH64_LINUX_SIZEOF_FPREGSET,
&aarch64_linux_fpregset, NULL, cb_data);
if (tdep->has_pauth ())
{
/* Create this on the fly in order to handle the variable location. */
const struct regcache_map_entry pauth_regmap[] =
{
{ 2, AARCH64_PAUTH_DMASK_REGNUM (tdep->pauth_reg_base), 8},
{ 0 }
};
const struct regset aarch64_linux_pauth_regset =
{
pauth_regmap, regcache_supply_regset, regcache_collect_regset
};
cb (".reg-aarch-pauth", AARCH64_LINUX_SIZEOF_PAUTH,
AARCH64_LINUX_SIZEOF_PAUTH, &aarch64_linux_pauth_regset,
"pauth registers", cb_data);
}
}
/* Implement the "core_read_description" gdbarch method. */
static const struct target_desc *
aarch64_linux_core_read_description (struct gdbarch *gdbarch,
struct target_ops *target, bfd *abfd)
{
CORE_ADDR hwcap = linux_get_hwcap (target);
return aarch64_read_description (aarch64_linux_core_read_vq (gdbarch, abfd),
hwcap & AARCH64_HWCAP_PACA);
}
/* Implementation of `gdbarch_stap_is_single_operand', as defined in
gdbarch.h. */
static int
aarch64_stap_is_single_operand (struct gdbarch *gdbarch, const char *s)
{
return (*s == '#' || isdigit (*s) /* Literal number. */
|| *s == '[' /* Register indirection. */
|| isalpha (*s)); /* Register value. */
}
/* This routine is used to parse a special token in AArch64's assembly.
The special tokens parsed by it are:
- Register displacement (e.g, [fp, #-8])
It returns one if the special token has been parsed successfully,
or zero if the current token is not considered special. */
static int
aarch64_stap_parse_special_token (struct gdbarch *gdbarch,
struct stap_parse_info *p)
{
if (*p->arg == '[')
{
/* Temporary holder for lookahead. */
const char *tmp = p->arg;
char *endp;
/* Used to save the register name. */
const char *start;
char *regname;
int len;
int got_minus = 0;
long displacement;
struct stoken str;
++tmp;
start = tmp;
/* Register name. */
while (isalnum (*tmp))
++tmp;
if (*tmp != ',')
return 0;
len = tmp - start;
regname = (char *) alloca (len + 2);
strncpy (regname, start, len);
regname[len] = '\0';
if (user_reg_map_name_to_regnum (gdbarch, regname, len) == -1)
error (_("Invalid register name `%s' on expression `%s'."),
regname, p->saved_arg);
++tmp;
tmp = skip_spaces (tmp);
/* Now we expect a number. It can begin with '#' or simply
a digit. */
if (*tmp == '#')
++tmp;
if (*tmp == '-')
{
++tmp;
got_minus = 1;
}
else if (*tmp == '+')
++tmp;
if (!isdigit (*tmp))
return 0;
displacement = strtol (tmp, &endp, 10);
tmp = endp;
/* Skipping last `]'. */
if (*tmp++ != ']')
return 0;
/* The displacement. */
write_exp_elt_opcode (&p->pstate, OP_LONG);
write_exp_elt_type (&p->pstate, builtin_type (gdbarch)->builtin_long);
write_exp_elt_longcst (&p->pstate, displacement);
write_exp_elt_opcode (&p->pstate, OP_LONG);
if (got_minus)
write_exp_elt_opcode (&p->pstate, UNOP_NEG);
/* The register name. */
write_exp_elt_opcode (&p->pstate, OP_REGISTER);
str.ptr = regname;
str.length = len;
write_exp_string (&p->pstate, str);
write_exp_elt_opcode (&p->pstate, OP_REGISTER);
write_exp_elt_opcode (&p->pstate, BINOP_ADD);
/* Casting to the expected type. */
write_exp_elt_opcode (&p->pstate, UNOP_CAST);
write_exp_elt_type (&p->pstate, lookup_pointer_type (p->arg_type));
write_exp_elt_opcode (&p->pstate, UNOP_CAST);
write_exp_elt_opcode (&p->pstate, UNOP_IND);
p->arg = tmp;
}
else
return 0;
return 1;
}
/* AArch64 process record-replay constructs: syscall, signal etc. */
struct linux_record_tdep aarch64_linux_record_tdep;
/* Enum that defines the AArch64 linux specific syscall identifiers used for
process record/replay. */
enum aarch64_syscall {
aarch64_sys_io_setup = 0,
aarch64_sys_io_destroy = 1,
aarch64_sys_io_submit = 2,
aarch64_sys_io_cancel = 3,
aarch64_sys_io_getevents = 4,
aarch64_sys_setxattr = 5,
aarch64_sys_lsetxattr = 6,
aarch64_sys_fsetxattr = 7,
aarch64_sys_getxattr = 8,
aarch64_sys_lgetxattr = 9,
aarch64_sys_fgetxattr = 10,
aarch64_sys_listxattr = 11,
aarch64_sys_llistxattr = 12,
aarch64_sys_flistxattr = 13,
aarch64_sys_removexattr = 14,
aarch64_sys_lremovexattr = 15,
aarch64_sys_fremovexattr = 16,
aarch64_sys_getcwd = 17,
aarch64_sys_lookup_dcookie = 18,
aarch64_sys_eventfd2 = 19,
aarch64_sys_epoll_create1 = 20,
aarch64_sys_epoll_ctl = 21,
aarch64_sys_epoll_pwait = 22,
aarch64_sys_dup = 23,
aarch64_sys_dup3 = 24,
aarch64_sys_fcntl = 25,
aarch64_sys_inotify_init1 = 26,
aarch64_sys_inotify_add_watch = 27,
aarch64_sys_inotify_rm_watch = 28,
aarch64_sys_ioctl = 29,
aarch64_sys_ioprio_set = 30,
aarch64_sys_ioprio_get = 31,
aarch64_sys_flock = 32,
aarch64_sys_mknodat = 33,
aarch64_sys_mkdirat = 34,
aarch64_sys_unlinkat = 35,
aarch64_sys_symlinkat = 36,
aarch64_sys_linkat = 37,
aarch64_sys_renameat = 38,
aarch64_sys_umount2 = 39,
aarch64_sys_mount = 40,
aarch64_sys_pivot_root = 41,
aarch64_sys_nfsservctl = 42,
aarch64_sys_statfs = 43,
aarch64_sys_fstatfs = 44,
aarch64_sys_truncate = 45,
aarch64_sys_ftruncate = 46,
aarch64_sys_fallocate = 47,
aarch64_sys_faccessat = 48,
aarch64_sys_chdir = 49,
aarch64_sys_fchdir = 50,
aarch64_sys_chroot = 51,
aarch64_sys_fchmod = 52,
aarch64_sys_fchmodat = 53,
aarch64_sys_fchownat = 54,
aarch64_sys_fchown = 55,
aarch64_sys_openat = 56,
aarch64_sys_close = 57,
aarch64_sys_vhangup = 58,
aarch64_sys_pipe2 = 59,
aarch64_sys_quotactl = 60,
aarch64_sys_getdents64 = 61,
aarch64_sys_lseek = 62,
aarch64_sys_read = 63,
aarch64_sys_write = 64,
aarch64_sys_readv = 65,
aarch64_sys_writev = 66,
aarch64_sys_pread64 = 67,
aarch64_sys_pwrite64 = 68,
aarch64_sys_preadv = 69,
aarch64_sys_pwritev = 70,
aarch64_sys_sendfile = 71,
aarch64_sys_pselect6 = 72,
aarch64_sys_ppoll = 73,
aarch64_sys_signalfd4 = 74,
aarch64_sys_vmsplice = 75,
aarch64_sys_splice = 76,
aarch64_sys_tee = 77,
aarch64_sys_readlinkat = 78,
aarch64_sys_newfstatat = 79,
aarch64_sys_fstat = 80,
aarch64_sys_sync = 81,
aarch64_sys_fsync = 82,
aarch64_sys_fdatasync = 83,
aarch64_sys_sync_file_range2 = 84,
aarch64_sys_sync_file_range = 84,
aarch64_sys_timerfd_create = 85,
aarch64_sys_timerfd_settime = 86,
aarch64_sys_timerfd_gettime = 87,
aarch64_sys_utimensat = 88,
aarch64_sys_acct = 89,
aarch64_sys_capget = 90,
aarch64_sys_capset = 91,
aarch64_sys_personality = 92,
aarch64_sys_exit = 93,
aarch64_sys_exit_group = 94,
aarch64_sys_waitid = 95,
aarch64_sys_set_tid_address = 96,
aarch64_sys_unshare = 97,
aarch64_sys_futex = 98,
aarch64_sys_set_robust_list = 99,
aarch64_sys_get_robust_list = 100,
aarch64_sys_nanosleep = 101,
aarch64_sys_getitimer = 102,
aarch64_sys_setitimer = 103,
aarch64_sys_kexec_load = 104,
aarch64_sys_init_module = 105,
aarch64_sys_delete_module = 106,
aarch64_sys_timer_create = 107,
aarch64_sys_timer_gettime = 108,
aarch64_sys_timer_getoverrun = 109,
aarch64_sys_timer_settime = 110,
aarch64_sys_timer_delete = 111,
aarch64_sys_clock_settime = 112,
aarch64_sys_clock_gettime = 113,
aarch64_sys_clock_getres = 114,
aarch64_sys_clock_nanosleep = 115,
aarch64_sys_syslog = 116,
aarch64_sys_ptrace = 117,
aarch64_sys_sched_setparam = 118,
aarch64_sys_sched_setscheduler = 119,
aarch64_sys_sched_getscheduler = 120,
aarch64_sys_sched_getparam = 121,
aarch64_sys_sched_setaffinity = 122,
aarch64_sys_sched_getaffinity = 123,
aarch64_sys_sched_yield = 124,
aarch64_sys_sched_get_priority_max = 125,
aarch64_sys_sched_get_priority_min = 126,
aarch64_sys_sched_rr_get_interval = 127,
aarch64_sys_kill = 129,
aarch64_sys_tkill = 130,
aarch64_sys_tgkill = 131,
aarch64_sys_sigaltstack = 132,
aarch64_sys_rt_sigsuspend = 133,
aarch64_sys_rt_sigaction = 134,
aarch64_sys_rt_sigprocmask = 135,
aarch64_sys_rt_sigpending = 136,
aarch64_sys_rt_sigtimedwait = 137,
aarch64_sys_rt_sigqueueinfo = 138,
aarch64_sys_rt_sigreturn = 139,
aarch64_sys_setpriority = 140,
aarch64_sys_getpriority = 141,
aarch64_sys_reboot = 142,
aarch64_sys_setregid = 143,
aarch64_sys_setgid = 144,
aarch64_sys_setreuid = 145,
aarch64_sys_setuid = 146,
aarch64_sys_setresuid = 147,
aarch64_sys_getresuid = 148,
aarch64_sys_setresgid = 149,
aarch64_sys_getresgid = 150,
aarch64_sys_setfsuid = 151,
aarch64_sys_setfsgid = 152,
aarch64_sys_times = 153,
aarch64_sys_setpgid = 154,
aarch64_sys_getpgid = 155,
aarch64_sys_getsid = 156,
aarch64_sys_setsid = 157,
aarch64_sys_getgroups = 158,
aarch64_sys_setgroups = 159,
aarch64_sys_uname = 160,
aarch64_sys_sethostname = 161,
aarch64_sys_setdomainname = 162,
aarch64_sys_getrlimit = 163,
aarch64_sys_setrlimit = 164,
aarch64_sys_getrusage = 165,
aarch64_sys_umask = 166,
aarch64_sys_prctl = 167,
aarch64_sys_getcpu = 168,
aarch64_sys_gettimeofday = 169,
aarch64_sys_settimeofday = 170,
aarch64_sys_adjtimex = 171,
aarch64_sys_getpid = 172,
aarch64_sys_getppid = 173,
aarch64_sys_getuid = 174,
aarch64_sys_geteuid = 175,
aarch64_sys_getgid = 176,
aarch64_sys_getegid = 177,
aarch64_sys_gettid = 178,
aarch64_sys_sysinfo = 179,
aarch64_sys_mq_open = 180,
aarch64_sys_mq_unlink = 181,
aarch64_sys_mq_timedsend = 182,
aarch64_sys_mq_timedreceive = 183,
aarch64_sys_mq_notify = 184,
aarch64_sys_mq_getsetattr = 185,
aarch64_sys_msgget = 186,
aarch64_sys_msgctl = 187,
aarch64_sys_msgrcv = 188,
aarch64_sys_msgsnd = 189,
aarch64_sys_semget = 190,
aarch64_sys_semctl = 191,
aarch64_sys_semtimedop = 192,
aarch64_sys_semop = 193,
aarch64_sys_shmget = 194,
aarch64_sys_shmctl = 195,
aarch64_sys_shmat = 196,
aarch64_sys_shmdt = 197,
aarch64_sys_socket = 198,
aarch64_sys_socketpair = 199,
aarch64_sys_bind = 200,
aarch64_sys_listen = 201,
aarch64_sys_accept = 202,
aarch64_sys_connect = 203,
aarch64_sys_getsockname = 204,
aarch64_sys_getpeername = 205,
aarch64_sys_sendto = 206,
aarch64_sys_recvfrom = 207,
aarch64_sys_setsockopt = 208,
aarch64_sys_getsockopt = 209,
aarch64_sys_shutdown = 210,
aarch64_sys_sendmsg = 211,
aarch64_sys_recvmsg = 212,
aarch64_sys_readahead = 213,
aarch64_sys_brk = 214,