/* Target-dependent code for GNU/Linux AArch64.
- Copyright (C) 2009-2015 Free Software Foundation, Inc.
+ Copyright (C) 2009-2020 Free Software Foundation, Inc.
Contributed by ARM Ltd.
This file is part of GDB.
#include "defs.h"
+#include "gdbcmd.h"
#include "gdbarch.h"
#include "glibc-tdep.h"
#include "linux-tdep.h"
#include "aarch64-tdep.h"
#include "aarch64-linux-tdep.h"
+#include "arch/aarch64-cap-linux.h"
#include "osabi.h"
#include "solib-svr4.h"
#include "symtab.h"
#include "tramp-frame.h"
#include "trad-frame.h"
+#include "target/target.h"
+#include "target.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 "record-full.h"
#include "linux-record.h"
+#include "value.h"
+
+/* For aarch64_debug. */
+#include "arch/aarch64-insn.h"
+
+#include "elf/common.h"
+
+#include "gdbsupport/capability.h"
+
/* Signal frame handling.
+------------+ ^
struct ucontext uc;
};
- typedef struct
- {
- ... 128 bytes
- } siginfo_t;
-
The ucontext has the following form:
struct ucontext
{
struct sigcontext uc_mcontext;
};
- typedef struct sigaltstack
- {
- void *ss_sp;
- int ss_flags;
- size_t ss_size;
- } stack_t;
-
struct sigcontext
{
unsigned long fault_address;
__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
#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
+#define AARCH64_MORELLO_MAGIC 0x4d524c01
+
+/* 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))
+
+/* Defines for the Morello sigcontext data, which is define in the kernel like
+ so:
+
+ struct morello_context
+ {
+ struct _aarch64_ctx head;
+ __u64 __pad;
+ __kernel_uintcap_t cregs[31];
+ __kernel_uintcap_t csp;
+ __kernel_uintcap_t rcsp;
+ __kernel_uintcap_t pcc;
+ };
+
+*/
+
+#define AARCH64_MORELLO_SIGCONTEXT_SIZE (8 + 8 + 34 * 16)
+#define AARCH64_MORELLO_SIGCONTEXT_C0_OFFSET 16
+
+/* 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. */
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;
- int i;
+ 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);
+
+ if (aarch64_debug)
+ {
+ debug_printf ("\naarch64: Entering aarch64_linux_sigframe_init\n");
+ }
+
+ /* Read in the integer registers. */
- for (i = 0; i < 31; i++)
+ 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);
+ + i * AARCH64_SIGCONTEXT_REG_SIZE);
}
trad_frame_set_reg_addr (this_cache, AARCH64_SP_REGNUM,
sigcontext_addr + AARCH64_SIGCONTEXT_XO_OFFSET
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_MORELLO_MAGIC:
+ {
+ if (aarch64_debug)
+ debug_printf ("aarch64: Found Morello section at %s.\n",
+ paddress (gdbarch, section));
+
+ /* Handle Morello sigcontext. */
+ if (!tdep->has_capability ())
+ break;
+
+ int regno = tdep->cap_reg_base;
+ CORE_ADDR offset = section + AARCH64_MORELLO_SIGCONTEXT_C0_OFFSET;
+ int reg_size = C_REGISTER_SIZE;
+
+ if (aarch64_debug)
+ {
+ debug_printf ("aarch64: Reading C registers from sigreturn "
+ "frame.\n");
+ }
+
+ for (int i = 0; i < AARCH64_C_REGS_NUM; i++)
+ {
+ trad_frame_set_reg_addr (this_cache, regno + i,
+ offset + i * reg_size);
+ }
+
+ if (aarch64_debug)
+ {
+ debug_printf ("aarch64: Reading PCC, CSP and RCSP registers "
+ "from sigreturn frame at %s.\n",
+ paddress (gdbarch, offset + 31 * reg_size));
+ }
+
+ trad_frame_set_reg_addr (this_cache, tdep->cap_reg_csp,
+ offset + 31 * reg_size);
+ trad_frame_set_reg_addr (this_cache, tdep->cap_reg_rcsp,
+ offset + 32 * reg_size);
+ trad_frame_set_reg_addr (this_cache, tdep->cap_reg_pcc,
+ offset + 33 * reg_size);
+
+ 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));
+
+ if (aarch64_debug)
+ debug_printf ("aarch64: Exitting aarch64_linux_sigframe_init\n");
}
static const struct tramp_frame aarch64_linux_rt_sigframe =
{
/* movz x8, 0x8b (S=1,o=10,h=0,i=0x8b,r=8)
Soo1 0010 1hhi iiii iiii iiii iiir rrrr */
- {0xd2801168, -1},
+ {0xd2801168, ULONGEST_MAX},
/* svc 0x0 (o=0, l=1)
1101 0100 oooi iiii iiii iiii iii0 00ll */
- {0xd4000001, -1},
- {TRAMP_SENTINEL_INSN, -1}
+ {0xd4000001, ULONGEST_MAX},
+ {TRAMP_SENTINEL_INSN, ULONGEST_MAX}
},
aarch64_linux_sigframe_init
};
{ 0 }
};
+/* Since the C register numbers are determined dynamically, we leave
+ placeholders so we can update the numbers later. */
+static struct regcache_map_entry aarch64_linux_cregmap[] =
+ {
+ { 31, -1, 16 }, /* c0 ... c30 */
+ { 1, -1, 16 }, /* pcc */
+ { 1, -1, 16 }, /* csp */
+ { 1, -1, 16 }, /* ddc */
+ { 1, -1, 16 }, /* ctpidr */
+ { 1, -1, 16 }, /* rcsp */
+ { 1, -1, 16 }, /* rddc */
+ { 1, -1, 16 }, /* rctpidr */
+ { 1, -1, 16 }, /* cid */
+ { 1, -1, 8 }, /* tag_map */
+ { 1, -1, 8 }, /* cctlr */
+ { 0 }
+ };
+
/* Register set definitions. */
const struct regset aarch64_linux_gregset =
regcache_supply_regset, regcache_collect_regset
};
-/* Implement the "regset_from_core_section" gdbarch method. */
+/* The capability register set. */
+const struct regset aarch64_linux_cregset =
+ {
+ aarch64_linux_cregmap,
+ 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 (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 "iterate_over_regset_sections" gdbarch method. */
static void
aarch64_linux_iterate_over_regset_sections (struct gdbarch *gdbarch,
void *cb_data,
const struct regcache *regcache)
{
- cb (".reg", AARCH64_LINUX_SIZEOF_GREGSET, &aarch64_linux_gregset,
- NULL, cb_data);
- cb (".reg2", AARCH64_LINUX_SIZEOF_FPREGSET, &aarch64_linux_fpregset,
- NULL, cb_data);
+ 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);
+ }
+
+ /* Morello capability registers. */
+ if (tdep->has_capability ())
+ {
+ cb (".reg-aarch-morello", AARCH64_LINUX_CREGS_SIZE,
+ AARCH64_LINUX_CREGS_SIZE, &aarch64_linux_cregset,
+ NULL, 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);
+ CORE_ADDR hwcap2 = linux_get_hwcap2 (target);
+ bool pauth_p = hwcap & AARCH64_HWCAP_PACA;
+ bool capability_p = hwcap2 & HWCAP2_MORELLO;
+
+ return aarch64_read_description (aarch64_linux_core_read_vq (gdbarch, abfd),
+ pauth_p, capability_p);
}
/* Implementation of `gdbarch_stap_is_single_operand', as defined in
return 0;
len = tmp - start;
- regname = alloca (len + 2);
+ regname = (char *) alloca (len + 2);
strncpy (regname, start, len);
regname[len] = '\0';
regname, p->saved_arg);
++tmp;
- tmp = skip_spaces_const (tmp);
+ tmp = skip_spaces (tmp);
/* Now we expect a number. It can begin with '#' or simply
a digit. */
if (*tmp == '#')
return 1;
}
-/* Implement the "get_syscall_number" gdbarch method. */
-
-static LONGEST
-aarch64_linux_get_syscall_number (struct gdbarch *gdbarch,
- ptid_t ptid)
-{
- struct regcache *regs = get_thread_regcache (ptid);
- enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
-
- /* The content of register x8. */
- gdb_byte buf[X_REGISTER_SIZE];
- /* The result. */
- LONGEST ret;
-
- /* Getting the system call number from the register x8. */
- regcache_cooked_read (regs, AARCH64_DWARF_X0 + 8, buf);
-
- ret = extract_signed_integer (buf, X_REGISTER_SIZE, byte_order);
-
- return ret;
-}
-
/* AArch64 process record-replay constructs: syscall, signal etc. */
struct linux_record_tdep aarch64_linux_record_tdep;
aarch64_sys_ioprio_set = 30,
aarch64_sys_ioprio_get = 31,
aarch64_sys_flock = 32,
- aarch64_sys_mknod = 33,
- aarch64_sys_mkdir = 34,
- aarch64_sys_unlink = 35,
- aarch64_sys_symlink = 36,
- aarch64_sys_link = 37,
- aarch64_sys_rename = 38,
+ 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_truncate = 45,
aarch64_sys_ftruncate = 46,
aarch64_sys_fallocate = 47,
- aarch64_sys_faccess = 48,
+ aarch64_sys_faccessat = 48,
aarch64_sys_chdir = 49,
aarch64_sys_fchdir = 50,
aarch64_sys_chroot = 51,
aarch64_sys_fchmodat = 53,
aarch64_sys_fchownat = 54,
aarch64_sys_fchown = 55,
- aarch64_sys_open = 56,
+ aarch64_sys_openat = 56,
aarch64_sys_close = 57,
aarch64_sys_vhangup = 58,
aarch64_sys_pipe2 = 59,
aarch64_sys_vmsplice = 75,
aarch64_sys_splice = 76,
aarch64_sys_tee = 77,
- aarch64_sys_readlink = 78,
- aarch64_sys_fstatat = 79,
+ aarch64_sys_readlinkat = 78,
+ aarch64_sys_newfstatat = 79,
aarch64_sys_fstat = 80,
aarch64_sys_sync = 81,
aarch64_sys_fsync = 82,
#define SYSCALL_MAP(SYSCALL) case aarch64_sys_##SYSCALL: \
return gdb_sys_##SYSCALL
+#define UNSUPPORTED_SYSCALL_MAP(SYSCALL) case aarch64_sys_##SYSCALL: \
+ return gdb_sys_no_syscall
+
switch (syscall_number)
{
SYSCALL_MAP (io_setup);
SYSCALL_MAP (fremovexattr);
SYSCALL_MAP (getcwd);
SYSCALL_MAP (lookup_dcookie);
-
- case aarch64_sys_epoll_create1:
- return gdb_sys_epoll_create;
-
+ SYSCALL_MAP (eventfd2);
+ SYSCALL_MAP (epoll_create1);
SYSCALL_MAP (epoll_ctl);
SYSCALL_MAP (epoll_pwait);
SYSCALL_MAP (dup);
+ SYSCALL_MAP (dup3);
SYSCALL_MAP (fcntl);
+ SYSCALL_MAP (inotify_init1);
SYSCALL_MAP (inotify_add_watch);
SYSCALL_MAP (inotify_rm_watch);
SYSCALL_MAP (ioctl);
SYSCALL_MAP (ioprio_set);
SYSCALL_MAP (ioprio_get);
SYSCALL_MAP (flock);
+ SYSCALL_MAP (mknodat);
+ SYSCALL_MAP (mkdirat);
+ SYSCALL_MAP (unlinkat);
+ SYSCALL_MAP (symlinkat);
+ SYSCALL_MAP (linkat);
+ SYSCALL_MAP (renameat);
+ UNSUPPORTED_SYSCALL_MAP (umount2);
SYSCALL_MAP (mount);
+ SYSCALL_MAP (pivot_root);
SYSCALL_MAP (nfsservctl);
SYSCALL_MAP (statfs);
SYSCALL_MAP (truncate);
SYSCALL_MAP (ftruncate);
+ SYSCALL_MAP (fallocate);
+ SYSCALL_MAP (faccessat);
SYSCALL_MAP (fchdir);
SYSCALL_MAP (chroot);
SYSCALL_MAP (fchmod);
SYSCALL_MAP (fchmodat);
SYSCALL_MAP (fchownat);
SYSCALL_MAP (fchown);
+ SYSCALL_MAP (openat);
SYSCALL_MAP (close);
SYSCALL_MAP (vhangup);
+ SYSCALL_MAP (pipe2);
SYSCALL_MAP (quotactl);
SYSCALL_MAP (getdents64);
SYSCALL_MAP (lseek);
SYSCALL_MAP (writev);
SYSCALL_MAP (pread64);
SYSCALL_MAP (pwrite64);
+ UNSUPPORTED_SYSCALL_MAP (preadv);
+ UNSUPPORTED_SYSCALL_MAP (pwritev);
SYSCALL_MAP (sendfile);
SYSCALL_MAP (pselect6);
SYSCALL_MAP (ppoll);
+ UNSUPPORTED_SYSCALL_MAP (signalfd4);
SYSCALL_MAP (vmsplice);
SYSCALL_MAP (splice);
SYSCALL_MAP (tee);
+ SYSCALL_MAP (readlinkat);
+ SYSCALL_MAP (newfstatat);
+
SYSCALL_MAP (fstat);
SYSCALL_MAP (sync);
SYSCALL_MAP (fsync);
SYSCALL_MAP (fdatasync);
SYSCALL_MAP (sync_file_range);
+ UNSUPPORTED_SYSCALL_MAP (timerfd_create);
+ UNSUPPORTED_SYSCALL_MAP (timerfd_settime);
+ UNSUPPORTED_SYSCALL_MAP (timerfd_gettime);
+ UNSUPPORTED_SYSCALL_MAP (utimensat);
SYSCALL_MAP (acct);
SYSCALL_MAP (capget);
SYSCALL_MAP (capset);
SYSCALL_MAP (getrusage);
SYSCALL_MAP (umask);
SYSCALL_MAP (prctl);
+ SYSCALL_MAP (getcpu);
SYSCALL_MAP (gettimeofday);
SYSCALL_MAP (settimeofday);
SYSCALL_MAP (adjtimex);
SYSCALL_MAP (set_mempolicy);
SYSCALL_MAP (migrate_pages);
SYSCALL_MAP (move_pages);
-
+ UNSUPPORTED_SYSCALL_MAP (rt_tgsigqueueinfo);
+ UNSUPPORTED_SYSCALL_MAP (perf_event_open);
+ UNSUPPORTED_SYSCALL_MAP (accept4);
+ UNSUPPORTED_SYSCALL_MAP (recvmmsg);
+
+ SYSCALL_MAP (wait4);
+
+ UNSUPPORTED_SYSCALL_MAP (prlimit64);
+ UNSUPPORTED_SYSCALL_MAP (fanotify_init);
+ UNSUPPORTED_SYSCALL_MAP (fanotify_mark);
+ UNSUPPORTED_SYSCALL_MAP (name_to_handle_at);
+ UNSUPPORTED_SYSCALL_MAP (open_by_handle_at);
+ UNSUPPORTED_SYSCALL_MAP (clock_adjtime);
+ UNSUPPORTED_SYSCALL_MAP (syncfs);
+ UNSUPPORTED_SYSCALL_MAP (setns);
+ UNSUPPORTED_SYSCALL_MAP (sendmmsg);
+ UNSUPPORTED_SYSCALL_MAP (process_vm_readv);
+ UNSUPPORTED_SYSCALL_MAP (process_vm_writev);
+ UNSUPPORTED_SYSCALL_MAP (kcmp);
+ UNSUPPORTED_SYSCALL_MAP (finit_module);
+ UNSUPPORTED_SYSCALL_MAP (sched_setattr);
+ UNSUPPORTED_SYSCALL_MAP (sched_getattr);
default:
- return -1;
+ return gdb_sys_no_syscall;
}
}
+/* Retrieve the syscall number at a ptrace syscall-stop, either on syscall entry
+ or exit. Return -1 upon error. */
+
+static LONGEST
+aarch64_linux_get_syscall_number (struct gdbarch *gdbarch, thread_info *thread)
+{
+ struct regcache *regs = get_thread_regcache (thread);
+ LONGEST ret;
+
+ /* Get the system call number from register x8. */
+ regs->cooked_read (AARCH64_X0_REGNUM + 8, &ret);
+
+ /* On exit from a successful execve, we will be in a new process and all the
+ registers will be cleared - x0 to x30 will be 0, except for a 1 in x7.
+ This function will only ever get called when stopped at the entry or exit
+ of a syscall, so by checking for 0 in x0 (arg0/retval), x1 (arg1), x8
+ (syscall), x29 (FP) and x30 (LR) we can infer:
+ 1) Either inferior is at exit from successful execve.
+ 2) Or inferior is at entry to a call to io_setup with invalid arguments and
+ a corrupted FP and LR.
+ It should be safe enough to assume case 1. */
+ if (ret == 0)
+ {
+ LONGEST x1 = -1, fp = -1, lr = -1;
+ regs->cooked_read (AARCH64_X0_REGNUM + 1, &x1);
+ regs->cooked_read (AARCH64_FP_REGNUM, &fp);
+ regs->cooked_read (AARCH64_LR_REGNUM, &lr);
+ if (x1 == 0 && fp ==0 && lr == 0)
+ return aarch64_sys_execve;
+ }
+
+ return ret;
+}
+
/* Record all registers but PC register for process-record. */
static int
int ret = 0;
enum gdb_syscall syscall_gdb;
- syscall_gdb = aarch64_canonicalize_syscall (svc_number);
+ syscall_gdb =
+ aarch64_canonicalize_syscall ((enum aarch64_syscall) svc_number);
if (syscall_gdb < 0)
{
return 0;
}
+/* Implement the "gcc_target_options" gdbarch method. */
+
+static std::string
+aarch64_linux_gcc_target_options (struct gdbarch *gdbarch)
+{
+ /* GCC doesn't know "-m64". */
+ return {};
+}
+
+/* AArch64 Linux implementation of the report_signal_info gdbarch
+ hook. Displays information about possible memory tag violations or
+ capability violations. */
+
+static void
+aarch64_linux_report_signal_info (struct gdbarch *gdbarch,
+ struct ui_out *uiout,
+ enum gdb_signal siggnal)
+{
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+
+ if (!tdep->has_capability () || siggnal != GDB_SIGNAL_SEGV)
+ return;
+
+ CORE_ADDR fault_addr = 0;
+ long si_code = 0;
+
+ try
+ {
+ /* Sigcode tells us if the segfault is actually a capability
+ violation. */
+ si_code = parse_and_eval_long ("$_siginfo.si_code\n");
+
+ fault_addr
+ = parse_and_eval_long ("$_siginfo._sifields._sigfault.si_addr");
+ }
+ catch (const gdb_exception &exception)
+ {
+ return;
+ }
+
+ /* If this is not a capability violation, just return. */
+ if (si_code != SEGV_CAPTAGERR && si_code != SEGV_CAPSEALEDERR
+ && si_code != SEGV_CAPBOUNDSERR && si_code != SEGV_CAPPERMERR
+ && si_code != SEGV_CAPSTORETAGERR)
+ return;
+
+ uiout->text ("\n");
+
+ std::string str_si_code;
+
+ switch (si_code)
+ {
+ case SEGV_CAPTAGERR:
+ str_si_code = "tag";
+ break;
+ case SEGV_CAPSEALEDERR:
+ str_si_code = "sealed";
+ break;
+ case SEGV_CAPBOUNDSERR:
+ str_si_code = "bounds";
+ break;
+ case SEGV_CAPPERMERR:
+ str_si_code = "permission";
+ break;
+ case SEGV_CAPSTORETAGERR:
+ str_si_code = "access";
+ break;
+ default:
+ str_si_code = "unknown";
+ break;
+ }
+
+ std::string str_meaning = "Capability " + str_si_code + " fault";
+ uiout->field_string ("sigcode-meaning", str_meaning);
+
+ /* FIXME-Morello: Show more information about the faults. */
+ uiout->text (_(" while accessing address "));
+ uiout->field_core_addr ("fault-addr", gdbarch, fault_addr);
+}
+
+/* AArch64 Linux implementation of the get_cap_tag_from_address gdbarch
+ hook. Returns the tag from the capability located at ADDR. */
+
+static bool
+aarch64_linux_get_cap_tag_from_address (struct gdbarch *gdbarch, CORE_ADDR addr)
+{
+ gdb::byte_vector cap;
+
+ cap = target_read_capability (addr);
+
+ if (cap.size () == 0)
+ return false;
+
+ return cap[0] != 0;
+}
+
+/* Return the number of Morello memory tag granules contained in the memory
+ range [addr, addr + len). */
+
+static size_t
+morello_get_tag_granules (CORE_ADDR addr, size_t len, size_t granule_size)
+{
+ /* An empty range has 0 tag granules. */
+ if (len == 0)
+ return 0;
+
+ /* Start address */
+ CORE_ADDR s_addr = align_down (addr, granule_size);
+ /* End address */
+ CORE_ADDR e_addr = align_down (addr + len - 1, granule_size);
+
+ /* We always have at least 1 granule because len is non-zero at this
+ point. */
+ return 1 + (e_addr - s_addr) / granule_size;
+}
+
+/* Maximum number of tags to request. */
+#define MAX_TAGS_TO_TRANSFER 1024
+
+/* AArch64 Linux implementation of the aarch64_create_memtag_notes_from_range
+ gdbarch hook. Create core file notes for memory tags. */
+
+static std::vector<gdb::byte_vector>
+aarch64_linux_create_memtag_notes_from_range (struct gdbarch *gdbarch,
+ CORE_ADDR start_address,
+ CORE_ADDR end_address)
+{
+ /* We only handle CHERI capability tags for now. */
+
+ /* Figure out how many tags we need to store in this memory range. */
+ int granules = morello_get_tag_granules (start_address,
+ end_address - start_address,
+ MORELLO_TAG_GRANULE_SIZE);
+
+ /* A vector to store multiple notes. */
+ std::vector<gdb::byte_vector> notes;
+
+ /* Add the CHERI note. */
+ notes.resize (1);
+ /* Resize to the number of bytes the tag granules will take. */
+ notes[0].resize (sizeof (struct tag_dump_header) + granules);
+
+ /* Retrieve the tags and store them in the vector. */
+ gdb::byte_vector tags;
+ CORE_ADDR address = start_address;
+ while (granules > 0)
+ {
+ /* Transfer tags in chunks. */
+ gdb::byte_vector tags_read;
+ size_t xfer_len
+ = (granules >= MAX_TAGS_TO_TRANSFER)? MAX_TAGS_TO_TRANSFER : granules;
+
+ /* First clear the vector of tags. */
+ tags_read.resize (0);
+
+ /* Copy tags in chunks. */
+ while (tags_read.size () < xfer_len)
+ {
+ CORE_ADDR addr
+ = address + tags_read.size () * MORELLO_TAG_GRANULE_SIZE;
+
+ /* Always align the address to 16 bytes so we can read the
+ capability properly. When we have a request to read only the
+ capability tags, then we won't need to do this. */
+ CORE_ADDR aligned_addr = align_down (addr, MORELLO_TAG_GRANULE_SIZE);
+ bool tag
+ = aarch64_linux_get_cap_tag_from_address (gdbarch, aligned_addr);
+ gdb_byte tag_byte = (tag == false)? 0 : 1;
+ tags_read.push_back (tag_byte);
+ }
+
+ /* This process may take a while. Make sure it is interruptible. */
+ QUIT;
+
+ /* Transfer over the tags that have been read. */
+ tags.insert (tags.end (), tags_read.begin (), tags_read.end ());
+
+ /* Adjust the remaining granules and starting address. */
+ granules -= tags_read.size ();
+ address += tags_read.size () * MORELLO_TAG_GRANULE_SIZE;
+ }
+
+ /* Create the header. Please note we don't yet compress the tag data.
+ We may do so in the future to save space, since a capability tag is only
+ 1 bit in size. */
+ struct tag_dump_header header;
+ header.format = ELF_CORE_TAG_CHERI;
+ header.start_vma = start_address;
+ header.end_vma = end_address;
+ header.u.cheri.granule_byte_size = MORELLO_TAG_GRANULE_SIZE;
+ header.u.cheri.tag_bit_size = MORELLO_TAG_BIT_SIZE;
+ header.u.cheri.__unused = 0;
+
+ /* Copy the tags to the note. */
+ memcpy (notes[0].data (), &header, sizeof (header));
+ memcpy (notes[0].data () + sizeof (header), tags.data (), tags.size ());
+
+ return notes;
+}
+
+/* AArch64 Linux implementation of the aarch64_decode_memtag_note gdbarch
+ hook. Decode a memory tag note and return the tag that it contains for
+ a particular address. */
+
+static gdb_byte
+aarch64_linux_decode_memtag_note (struct gdbarch *gdbarch,
+ gdb::array_view <const gdb_byte> note,
+ CORE_ADDR address)
+{
+ /* Read the header. */
+ struct tag_dump_header header;
+ memcpy (&header, note.data (), sizeof (header));
+
+ /* Align the address to 16 bytes. We assume the start_vma is already
+ aligned to the proper boundary, otherwise we would have tags dumped
+ into two different memory mappings. */
+ address = align_down (address, MORELLO_TAG_GRANULE_SIZE);
+ CORE_ADDR offset = address - header.start_vma;
+ gdb_byte tag;
+
+ /* Read the tag. */
+ memcpy (&tag, note.data () + sizeof (header)
+ + (offset / header.u.cheri.granule_byte_size), 1);
+
+ return tag;
+}
+
+/* Implement the maintenance print capability tag command. */
+
+static void
+maint_print_cap_from_addr_cmd (const char *args, int from_tty)
+{
+ gdb::byte_vector cap;
+ CORE_ADDR addr = parse_and_eval_address (args);
+ cap = target_read_capability (addr);
+
+ if (cap.empty ())
+ {
+ fprintf_unfiltered (gdb_stdlog,
+ "Could not read capability from address %s.\n",
+ phex_nz (addr, 8));
+ return;
+ }
+
+ for (auto it : cap)
+ fprintf_unfiltered (gdb_stdlog, "%02x ", it);
+ fputs_unfiltered ("\n", gdb_stdlog);
+
+ bool tag = (cap[0] == 1);
+ uint128_t cap_128bits;
+ memcpy (&cap_128bits, &cap[1], 16);
+
+ capability capability (cap_128bits, tag);
+
+ fprintf_unfiltered (gdb_stdlog, "verbose: %s\n",
+ capability.to_str (false).c_str ());
+ fputs_unfiltered ("\n", gdb_stdlog);
+ fprintf_unfiltered (gdb_stdlog, "compact: %s\n",
+ capability.to_str (true).c_str ());
+}
+
+/* Implement the maintenance set capability in memory command. */
+
+static void
+maint_set_capability_in_memory_cmd (const char *args, int from_tty)
+{
+ std::string addr_str, tag_str, upper_str, lower_str;
+ const char *args_ptr = args;
+
+ addr_str = extract_string_maybe_quoted (&args_ptr);
+ tag_str = extract_string_maybe_quoted (&args_ptr);
+ upper_str = extract_string_maybe_quoted (&args_ptr);
+ lower_str = extract_string_maybe_quoted (&args_ptr);
+
+ CORE_ADDR addr = parse_and_eval_address (addr_str.c_str ());
+ CORE_ADDR tag_part = parse_and_eval_address (tag_str.c_str ());
+ CORE_ADDR half_a = parse_and_eval_address (upper_str.c_str ());
+ CORE_ADDR half_b = parse_and_eval_address (lower_str.c_str ());
+
+ unsigned __int128 a, b;
+
+ a = half_a;
+ b = half_b;
+
+ a = (a << 64) | b;
+ bool tag = (tag_part != 0)? true : false;
+
+ gdb::byte_vector cap;
+
+ cap.resize (17);
+ memcpy (cap.data (), &tag, 1);
+ memcpy (cap.data () + 1, &a, 16);
+
+ if (!target_write_capability (addr, {cap.data (), cap.size ()}))
+ perror_with_name (_("Failed to set capability in memory."));
+}
+
static void
aarch64_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
{
set_gdbarch_iterate_over_regset_sections
(gdbarch, aarch64_linux_iterate_over_regset_sections);
+ set_gdbarch_core_read_description
+ (gdbarch, aarch64_linux_core_read_description);
/* SystemTap related. */
set_gdbarch_stap_integer_prefixes (gdbarch, stap_integer_prefixes);
/* Syscall record. */
tdep->aarch64_syscall_record = aarch64_linux_syscall_record;
+ /* The top byte of a user space address known as the "tag",
+ is ignored by the kernel and can be regarded as additional
+ data associated with the address. */
+ set_gdbarch_significant_addr_bit (gdbarch, 56);
+
/* Initialize the aarch64_linux_record_tdep. */
/* These values are the size of the type that will be used in a system
call. They are obtained from Linux Kernel source. */
aarch64_linux_record_tdep.size_flock = 32;
aarch64_linux_record_tdep.size_oldold_utsname = 45;
aarch64_linux_record_tdep.size_ustat = 32;
- aarch64_linux_record_tdep.size_old_sigaction = 152;
- aarch64_linux_record_tdep.size_old_sigset_t = 128;
+ aarch64_linux_record_tdep.size_old_sigaction = 32;
+ aarch64_linux_record_tdep.size_old_sigset_t = 8;
aarch64_linux_record_tdep.size_rlimit = 16;
aarch64_linux_record_tdep.size_rusage = 144;
aarch64_linux_record_tdep.size_timeval = 16;
aarch64_linux_record_tdep.size_old_gid_t = 2;
aarch64_linux_record_tdep.size_old_uid_t = 2;
aarch64_linux_record_tdep.size_fd_set = 128;
- aarch64_linux_record_tdep.size_dirent = 280;
- aarch64_linux_record_tdep.size_dirent64 = 280;
+ aarch64_linux_record_tdep.size_old_dirent = 280;
aarch64_linux_record_tdep.size_statfs = 120;
aarch64_linux_record_tdep.size_statfs64 = 120;
aarch64_linux_record_tdep.size_sockaddr = 16;
aarch64_linux_record_tdep.size_NFS_FHSIZE = 32;
aarch64_linux_record_tdep.size_knfsd_fh = 132;
aarch64_linux_record_tdep.size_TASK_COMM_LEN = 16;
- aarch64_linux_record_tdep.size_sigaction = 152;
- aarch64_linux_record_tdep.size_sigset_t = 128;
+ aarch64_linux_record_tdep.size_sigaction = 32;
+ aarch64_linux_record_tdep.size_sigset_t = 8;
aarch64_linux_record_tdep.size_siginfo_t = 128;
aarch64_linux_record_tdep.size_cap_user_data_t = 8;
aarch64_linux_record_tdep.size_stack_t = 24;
aarch64_linux_record_tdep.size_epoll_event = 12;
aarch64_linux_record_tdep.size_itimerspec = 32;
aarch64_linux_record_tdep.size_mq_attr = 64;
- aarch64_linux_record_tdep.size_siginfo = 128;
- aarch64_linux_record_tdep.size_termios = 60;
+ aarch64_linux_record_tdep.size_termios = 36;
aarch64_linux_record_tdep.size_termios2 = 44;
aarch64_linux_record_tdep.size_pid_t = 4;
aarch64_linux_record_tdep.size_winsize = 8;
aarch64_linux_record_tdep.size_hayes_esp_config = 12;
aarch64_linux_record_tdep.size_size_t = 8;
aarch64_linux_record_tdep.size_iovec = 16;
+ aarch64_linux_record_tdep.size_time_t = 8;
/* These values are the second argument of system call "sys_ioctl".
They are obtained from Linux Kernel source. */
/* `catch syscall' */
set_xml_syscall_file_name (gdbarch, "syscalls/aarch64-linux.xml");
set_gdbarch_get_syscall_number (gdbarch, aarch64_linux_get_syscall_number);
-}
-/* Provide a prototype to silence -Wmissing-prototypes. */
-extern initialize_file_ftype _initialize_aarch64_linux_tdep;
+ set_gdbarch_displaced_step_hw_singlestep (gdbarch,
+ aarch64_displaced_step_hw_singlestep);
+
+ set_gdbarch_gcc_target_options (gdbarch, aarch64_linux_gcc_target_options);
+
+ if (tdep->has_capability ())
+ {
+ /* Register CHERI-specific linkmap offsets for the AAPCS64_CAP ABI. */
+ if (tdep->abi == AARCH64_ABI_AAPCS64_CAP)
+ set_solib_svr4_fetch_link_map_offsets (gdbarch,
+ svr4_lp64_cheri_fetch_link_map_offsets);
+
+ /* Initialize the register numbers for the core file register set.
+ Please note the PCC/CSP position in GDB's target description is
+ the inverse of the position in the Linux Kernel's user_morello_state
+ data structure. This can cause some confusion. */
+ aarch64_linux_cregmap[0].regno = tdep->cap_reg_base;
+ aarch64_linux_cregmap[1].regno = tdep->cap_reg_pcc;
+ aarch64_linux_cregmap[2].regno = tdep->cap_reg_csp;
+
+ /* Set the rest of the registers. */
+ int next_regnum = tdep->cap_reg_base + 33;
+ for (int i = 3; i <= 10; i++)
+ {
+ aarch64_linux_cregmap[i].regno = next_regnum;
+ next_regnum++;
+ }
+
+ set_gdbarch_report_signal_info (gdbarch,
+ aarch64_linux_report_signal_info);
+ set_gdbarch_get_cap_tag_from_address (gdbarch,
+ aarch64_linux_get_cap_tag_from_address);
+
+ /* Core file helpers. */
+
+ /* Core file helper to create memory tag notes for a particular range of
+ addresses. */
+ set_gdbarch_create_memtag_notes_from_range (gdbarch,
+ aarch64_linux_create_memtag_notes_from_range);
+
+ /* Core file helper to decode a memory tag note. */
+ set_gdbarch_decode_memtag_note (gdbarch,
+ aarch64_linux_decode_memtag_note);
+
+ add_cmd ("cap_from_addr", class_maintenance, maint_print_cap_from_addr_cmd,
+ _("Print the capability from addr."), &maintenanceprintlist);
+
+ add_cmd ("cap_in_memory", class_maintenance,
+ maint_set_capability_in_memory_cmd,
+ _("Print the capability from addr."), &maintenancelist);
+ }
+ else
+ {
+ /* Displaced stepping. */
+ /* Note: Morello does not support displaced stepping yet because
+ adjustments to GPR's may not be correct. This is because GDB can't
+ make adjustments to the upper 65 bits of the C registers. */
+ set_gdbarch_max_insn_length (gdbarch,
+ 4 * AARCH64_DISPLACED_MODIFIED_INSNS);
+ set_gdbarch_displaced_step_copy_insn (gdbarch,
+ aarch64_displaced_step_copy_insn);
+ set_gdbarch_displaced_step_fixup (gdbarch, aarch64_displaced_step_fixup);
+ set_gdbarch_displaced_step_location (gdbarch,
+ linux_displaced_step_location);
+ }
+}
+void _initialize_aarch64_linux_tdep ();
void
-_initialize_aarch64_linux_tdep (void)
+_initialize_aarch64_linux_tdep ()
{
gdbarch_register_osabi (bfd_arch_aarch64, 0, GDB_OSABI_LINUX,
aarch64_linux_init_abi);
projects / thirdparty / binutils-gdb.git / blobdiff