/* Target-dependent code for GNU/Linux AArch64.
- Copyright (C) 2009-2013 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"
-/* The general-purpose regset consists of 31 X registers, plus SP, PC,
- and PSTATE registers, as defined in the AArch64 port of the Linux
- kernel. */
-#define AARCH64_LINUX_SIZEOF_GREGSET (34 * X_REGISTER_SIZE)
+#include "stap-probe.h"
+#include "parser-defs.h"
+#include "user-regs.h"
+#include "xml-syscall.h"
+#include <ctype.h>
-/* The fp regset consists of 32 V registers, plus FPCR and FPSR which
- are 4 bytes wide each, and the whole structure is padded to 128 bit
- alignment. */
-#define AARCH64_LINUX_SIZEOF_FPREGSET (33 * V_REGISTER_SIZE)
+#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.
- +----------+ ^
- | saved lr | |
- +->| saved fp |--+
- | | |
- | | |
- | +----------+
- | | saved lr |
- +--| saved fp |
- ^ | |
- | | |
- | +----------+
- ^ | |
- | | signal |
- | | |
- | | saved lr |-->interrupted_function_pc
- +--| saved fp |
- | +----------+
- | | saved lr |--> default_restorer (movz x8, NR_sys_rt_sigreturn; svc 0)
- +--| saved fp |<- FP
- | |
- | |<- SP
- +----------+
+ +------------+ ^
+ | 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.
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
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.
#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 fp = get_frame_register_unsigned (this_frame, AARCH64_FP_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
+ + 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_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;
}
- trad_frame_set_reg_addr (this_cache, AARCH64_FP_REGNUM, fp);
- trad_frame_set_reg_addr (this_cache, AARCH64_LR_REGNUM, fp + 8);
- trad_frame_set_reg_addr (this_cache, AARCH64_PC_REGNUM, fp + 8);
+ 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));
- trad_frame_set_id (this_cache, frame_id_build (fp, func));
+ 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
};
-/* Fill GDB's register array with the general-purpose register values
- in the buffer pointed by GREGS_BUF. */
+/* Register maps. */
-void
-aarch64_linux_supply_gregset (struct regcache *regcache,
- const gdb_byte *gregs_buf)
+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 }
+ };
+
+/* 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 =
+ {
+ 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 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)
{
- int regno;
+ 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);
- for (regno = AARCH64_X0_REGNUM; regno <= AARCH64_CPSR_REGNUM; regno++)
- regcache_raw_supply (regcache, regno,
- gregs_buf + X_REGISTER_SIZE
- * (regno - AARCH64_X0_REGNUM));
+ 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;
}
-/* The "supply_regset" function for the general-purpose register set. */
+/* 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
-supply_gregset_from_core (const struct regset *regset,
- struct regcache *regcache,
- int regnum, const void *regbuf, size_t len)
+aarch64_linux_supply_sve_regset (const struct regset *regset,
+ struct regcache *regcache,
+ int regnum, const void *buf, size_t size)
{
- aarch64_linux_supply_gregset (regcache, (const gdb_byte *) regbuf);
+ 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);
+ }
}
-/* Fill GDB's register array with the floating-point register values
- in the buffer pointed by FPREGS_BUF. */
+/* Collect register REGNUM from REGCACHE to BUF, using the register
+ map in REGSET. If REGNUM is -1, do this for all registers in
+ REGSET. */
-void
-aarch64_linux_supply_fpregset (struct regcache *regcache,
- const gdb_byte *fpregs_buf)
+static void
+aarch64_linux_collect_sve_regset (const struct regset *regset,
+ const struct regcache *regcache,
+ int regnum, void *buf, size_t size)
{
- int regno;
+ 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);
- for (regno = AARCH64_V0_REGNUM; regno <= AARCH64_V31_REGNUM; regno++)
- regcache_raw_supply (regcache, regno,
- fpregs_buf + V_REGISTER_SIZE
- * (regno - AARCH64_V0_REGNUM));
+ /* BUF starts with a SVE header prior to the register dump. */
- regcache_raw_supply (regcache, AARCH64_FPSR_REGNUM,
- fpregs_buf + V_REGISTER_SIZE * 32);
- regcache_raw_supply (regcache, AARCH64_FPCR_REGNUM,
- fpregs_buf + V_REGISTER_SIZE * 32 + 4);
+ 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);
}
-/* The "supply_regset" function for the floating-point register set. */
+/* Implement the "iterate_over_regset_sections" gdbarch method. */
static void
-supply_fpregset_from_core (const struct regset *regset,
- struct regcache *regcache,
- int regnum, const void *regbuf, size_t len)
+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);
+ }
+
+ /* 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
+ 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,
+ aarch64_sys_munmap = 215,
+ aarch64_sys_mremap = 216,
+ aarch64_sys_add_key = 217,
+ aarch64_sys_request_key = 218,
+ aarch64_sys_keyctl = 219,
+ aarch64_sys_clone = 220,
+ aarch64_sys_execve = 221,
+ aarch64_sys_mmap = 222,
+ aarch64_sys_fadvise64 = 223,
+ aarch64_sys_swapon = 224,
+ aarch64_sys_swapoff = 225,
+ aarch64_sys_mprotect = 226,
+ aarch64_sys_msync = 227,
+ aarch64_sys_mlock = 228,
+ aarch64_sys_munlock = 229,
+ aarch64_sys_mlockall = 230,
+ aarch64_sys_munlockall = 231,
+ aarch64_sys_mincore = 232,
+ aarch64_sys_madvise = 233,
+ aarch64_sys_remap_file_pages = 234,
+ aarch64_sys_mbind = 235,
+ aarch64_sys_get_mempolicy = 236,
+ aarch64_sys_set_mempolicy = 237,
+ aarch64_sys_migrate_pages = 238,
+ aarch64_sys_move_pages = 239,
+ aarch64_sys_rt_tgsigqueueinfo = 240,
+ aarch64_sys_perf_event_open = 241,
+ aarch64_sys_accept4 = 242,
+ aarch64_sys_recvmmsg = 243,
+ aarch64_sys_wait4 = 260,
+ aarch64_sys_prlimit64 = 261,
+ aarch64_sys_fanotify_init = 262,
+ aarch64_sys_fanotify_mark = 263,
+ aarch64_sys_name_to_handle_at = 264,
+ aarch64_sys_open_by_handle_at = 265,
+ aarch64_sys_clock_adjtime = 266,
+ aarch64_sys_syncfs = 267,
+ aarch64_sys_setns = 268,
+ aarch64_sys_sendmmsg = 269,
+ aarch64_sys_process_vm_readv = 270,
+ aarch64_sys_process_vm_writev = 271,
+ aarch64_sys_kcmp = 272,
+ aarch64_sys_finit_module = 273,
+ aarch64_sys_sched_setattr = 274,
+ aarch64_sys_sched_getattr = 275,
+};
+
+/* aarch64_canonicalize_syscall maps syscall ids from the native AArch64
+ linux set of syscall ids into a canonical set of syscall ids used by
+ process record. */
+
+static enum gdb_syscall
+aarch64_canonicalize_syscall (enum aarch64_syscall syscall_number)
+{
+#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 (io_destroy);
+ SYSCALL_MAP (io_submit);
+ SYSCALL_MAP (io_cancel);
+ SYSCALL_MAP (io_getevents);
+
+ SYSCALL_MAP (setxattr);
+ SYSCALL_MAP (lsetxattr);
+ SYSCALL_MAP (fsetxattr);
+ SYSCALL_MAP (getxattr);
+ SYSCALL_MAP (lgetxattr);
+ SYSCALL_MAP (fgetxattr);
+ SYSCALL_MAP (listxattr);
+ SYSCALL_MAP (llistxattr);
+ SYSCALL_MAP (flistxattr);
+ SYSCALL_MAP (removexattr);
+ SYSCALL_MAP (lremovexattr);
+ SYSCALL_MAP (fremovexattr);
+ SYSCALL_MAP (getcwd);
+ SYSCALL_MAP (lookup_dcookie);
+ 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 (read);
+ SYSCALL_MAP (write);
+ SYSCALL_MAP (readv);
+ 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 (personality);
+ SYSCALL_MAP (exit);
+ SYSCALL_MAP (exit_group);
+ SYSCALL_MAP (waitid);
+ SYSCALL_MAP (set_tid_address);
+ SYSCALL_MAP (unshare);
+ SYSCALL_MAP (futex);
+ SYSCALL_MAP (set_robust_list);
+ SYSCALL_MAP (get_robust_list);
+ SYSCALL_MAP (nanosleep);
+
+ SYSCALL_MAP (getitimer);
+ SYSCALL_MAP (setitimer);
+ SYSCALL_MAP (kexec_load);
+ SYSCALL_MAP (init_module);
+ SYSCALL_MAP (delete_module);
+ SYSCALL_MAP (timer_create);
+ SYSCALL_MAP (timer_settime);
+ SYSCALL_MAP (timer_gettime);
+ SYSCALL_MAP (timer_getoverrun);
+ SYSCALL_MAP (timer_delete);
+ SYSCALL_MAP (clock_settime);
+ SYSCALL_MAP (clock_gettime);
+ SYSCALL_MAP (clock_getres);
+ SYSCALL_MAP (clock_nanosleep);
+ SYSCALL_MAP (syslog);
+ SYSCALL_MAP (ptrace);
+ SYSCALL_MAP (sched_setparam);
+ SYSCALL_MAP (sched_setscheduler);
+ SYSCALL_MAP (sched_getscheduler);
+ SYSCALL_MAP (sched_getparam);
+ SYSCALL_MAP (sched_setaffinity);
+ SYSCALL_MAP (sched_getaffinity);
+ SYSCALL_MAP (sched_yield);
+ SYSCALL_MAP (sched_get_priority_max);
+ SYSCALL_MAP (sched_get_priority_min);
+ SYSCALL_MAP (sched_rr_get_interval);
+ SYSCALL_MAP (kill);
+ SYSCALL_MAP (tkill);
+ SYSCALL_MAP (tgkill);
+ SYSCALL_MAP (sigaltstack);
+ SYSCALL_MAP (rt_sigsuspend);
+ SYSCALL_MAP (rt_sigaction);
+ SYSCALL_MAP (rt_sigprocmask);
+ SYSCALL_MAP (rt_sigpending);
+ SYSCALL_MAP (rt_sigtimedwait);
+ SYSCALL_MAP (rt_sigqueueinfo);
+ SYSCALL_MAP (rt_sigreturn);
+ SYSCALL_MAP (setpriority);
+ SYSCALL_MAP (getpriority);
+ SYSCALL_MAP (reboot);
+ SYSCALL_MAP (setregid);
+ SYSCALL_MAP (setgid);
+ SYSCALL_MAP (setreuid);
+ SYSCALL_MAP (setuid);
+ SYSCALL_MAP (setresuid);
+ SYSCALL_MAP (getresuid);
+ SYSCALL_MAP (setresgid);
+ SYSCALL_MAP (getresgid);
+ SYSCALL_MAP (setfsuid);
+ SYSCALL_MAP (setfsgid);
+ SYSCALL_MAP (times);
+ SYSCALL_MAP (setpgid);
+ SYSCALL_MAP (getpgid);
+ SYSCALL_MAP (getsid);
+ SYSCALL_MAP (setsid);
+ SYSCALL_MAP (getgroups);
+ SYSCALL_MAP (setgroups);
+ SYSCALL_MAP (uname);
+ SYSCALL_MAP (sethostname);
+ SYSCALL_MAP (setdomainname);
+ SYSCALL_MAP (getrlimit);
+ SYSCALL_MAP (setrlimit);
+ SYSCALL_MAP (getrusage);
+ SYSCALL_MAP (umask);
+ SYSCALL_MAP (prctl);
+ SYSCALL_MAP (getcpu);
+ SYSCALL_MAP (gettimeofday);
+ SYSCALL_MAP (settimeofday);
+ SYSCALL_MAP (adjtimex);
+ SYSCALL_MAP (getpid);
+ SYSCALL_MAP (getppid);
+ SYSCALL_MAP (getuid);
+ SYSCALL_MAP (geteuid);
+ SYSCALL_MAP (getgid);
+ SYSCALL_MAP (getegid);
+ SYSCALL_MAP (gettid);
+ SYSCALL_MAP (sysinfo);
+ SYSCALL_MAP (mq_open);
+ SYSCALL_MAP (mq_unlink);
+ SYSCALL_MAP (mq_timedsend);
+ SYSCALL_MAP (mq_timedreceive);
+ SYSCALL_MAP (mq_notify);
+ SYSCALL_MAP (mq_getsetattr);
+ SYSCALL_MAP (msgget);
+ SYSCALL_MAP (msgctl);
+ SYSCALL_MAP (msgrcv);
+ SYSCALL_MAP (msgsnd);
+ SYSCALL_MAP (semget);
+ SYSCALL_MAP (semctl);
+ SYSCALL_MAP (semtimedop);
+ SYSCALL_MAP (semop);
+ SYSCALL_MAP (shmget);
+ SYSCALL_MAP (shmctl);
+ SYSCALL_MAP (shmat);
+ SYSCALL_MAP (shmdt);
+ SYSCALL_MAP (socket);
+ SYSCALL_MAP (socketpair);
+ SYSCALL_MAP (bind);
+ SYSCALL_MAP (listen);
+ SYSCALL_MAP (accept);
+ SYSCALL_MAP (connect);
+ SYSCALL_MAP (getsockname);
+ SYSCALL_MAP (getpeername);
+ SYSCALL_MAP (sendto);
+ SYSCALL_MAP (recvfrom);
+ SYSCALL_MAP (setsockopt);
+ SYSCALL_MAP (getsockopt);
+ SYSCALL_MAP (shutdown);
+ SYSCALL_MAP (sendmsg);
+ SYSCALL_MAP (recvmsg);
+ SYSCALL_MAP (readahead);
+ SYSCALL_MAP (brk);
+ SYSCALL_MAP (munmap);
+ SYSCALL_MAP (mremap);
+ SYSCALL_MAP (add_key);
+ SYSCALL_MAP (request_key);
+ SYSCALL_MAP (keyctl);
+ SYSCALL_MAP (clone);
+ SYSCALL_MAP (execve);
+
+ case aarch64_sys_mmap:
+ return gdb_sys_mmap2;
+
+ SYSCALL_MAP (fadvise64);
+ SYSCALL_MAP (swapon);
+ SYSCALL_MAP (swapoff);
+ SYSCALL_MAP (mprotect);
+ SYSCALL_MAP (msync);
+ SYSCALL_MAP (mlock);
+ SYSCALL_MAP (munlock);
+ SYSCALL_MAP (mlockall);
+ SYSCALL_MAP (munlockall);
+ SYSCALL_MAP (mincore);
+ SYSCALL_MAP (madvise);
+ SYSCALL_MAP (remap_file_pages);
+ SYSCALL_MAP (mbind);
+ SYSCALL_MAP (get_mempolicy);
+ 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 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
+aarch64_all_but_pc_registers_record (struct regcache *regcache)
{
- aarch64_linux_supply_fpregset (regcache, (const gdb_byte *) regbuf);
+ int i;
+
+ for (i = AARCH64_X0_REGNUM; i < AARCH64_PC_REGNUM; i++)
+ if (record_full_arch_list_add_reg (regcache, i))
+ return -1;
+
+ if (record_full_arch_list_add_reg (regcache, AARCH64_CPSR_REGNUM))
+ return -1;
+
+ return 0;
}
-/* Implement the "regset_from_core_section" gdbarch method. */
+/* Handler for aarch64 system call instruction recording. */
-static const struct regset *
-aarch64_linux_regset_from_core_section (struct gdbarch *gdbarch,
- const char *sect_name,
- size_t sect_size)
+static int
+aarch64_linux_syscall_record (struct regcache *regcache,
+ unsigned long svc_number)
+{
+ int ret = 0;
+ enum gdb_syscall syscall_gdb;
+
+ syscall_gdb =
+ aarch64_canonicalize_syscall ((enum aarch64_syscall) svc_number);
+
+ if (syscall_gdb < 0)
+ {
+ printf_unfiltered (_("Process record and replay target doesn't "
+ "support syscall number %s\n"),
+ plongest (svc_number));
+ return -1;
+ }
+
+ if (syscall_gdb == gdb_sys_sigreturn
+ || syscall_gdb == gdb_sys_rt_sigreturn)
+ {
+ if (aarch64_all_but_pc_registers_record (regcache))
+ return -1;
+ return 0;
+ }
+
+ ret = record_linux_system_call (syscall_gdb, regcache,
+ &aarch64_linux_record_tdep);
+ if (ret != 0)
+ return ret;
+
+ /* Record the return value of the system call. */
+ if (record_full_arch_list_add_reg (regcache, AARCH64_X0_REGNUM))
+ return -1;
+ /* Record LR. */
+ if (record_full_arch_list_add_reg (regcache, AARCH64_LR_REGNUM))
+ return -1;
+ /* Record CPSR. */
+ if (record_full_arch_list_add_reg (regcache, AARCH64_CPSR_REGNUM))
+ return -1;
+
+ 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 (strcmp (sect_name, ".reg") == 0
- && sect_size == AARCH64_LINUX_SIZEOF_GREGSET)
+ 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)
{
- if (tdep->gregset == NULL)
- tdep->gregset = regset_alloc (gdbarch, supply_gregset_from_core,
- NULL);
- return tdep->gregset;
+ /* 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;
}
- if (strcmp (sect_name, ".reg2") == 0
- && sect_size == AARCH64_LINUX_SIZEOF_FPREGSET)
+ /* 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 ())
{
- if (tdep->fpregset == NULL)
- tdep->fpregset = regset_alloc (gdbarch, supply_fpregset_from_core,
- NULL);
- return tdep->fpregset;
+ fprintf_unfiltered (gdb_stdlog,
+ "Could not read capability from address %s.\n",
+ phex_nz (addr, 8));
+ return;
}
- return NULL;
+
+ 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)
{
+ static const char *const stap_integer_prefixes[] = { "#", "", NULL };
+ static const char *const stap_register_prefixes[] = { "", NULL };
+ static const char *const stap_register_indirection_prefixes[] = { "[",
+ NULL };
+ static const char *const stap_register_indirection_suffixes[] = { "]",
+ NULL };
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
tdep->lowest_pc = 0x8000;
/* Shared library handling. */
set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target);
+ set_gdbarch_skip_solib_resolver (gdbarch, glibc_skip_solib_resolver);
- set_gdbarch_get_siginfo_type (gdbarch, linux_get_siginfo_type);
tramp_frame_prepend_unwinder (gdbarch, &aarch64_linux_rt_sigframe);
/* Enable longjmp. */
tdep->jb_pc = 11;
- set_gdbarch_regset_from_core_section (gdbarch,
- aarch64_linux_regset_from_core_section);
-}
+ 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);
+ set_gdbarch_stap_register_prefixes (gdbarch, stap_register_prefixes);
+ set_gdbarch_stap_register_indirection_prefixes (gdbarch,
+ stap_register_indirection_prefixes);
+ set_gdbarch_stap_register_indirection_suffixes (gdbarch,
+ stap_register_indirection_suffixes);
+ set_gdbarch_stap_is_single_operand (gdbarch, aarch64_stap_is_single_operand);
+ set_gdbarch_stap_parse_special_token (gdbarch,
+ aarch64_stap_parse_special_token);
+
+ /* Reversible debugging, process record. */
+ set_gdbarch_process_record (gdbarch, aarch64_process_record);
+ /* 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);
-/* Provide a prototype to silence -Wmissing-prototypes. */
-extern initialize_file_ftype _initialize_aarch64_linux_tdep;
+ /* 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_pointer
+ = gdbarch_ptr_bit (gdbarch) / TARGET_CHAR_BIT;
+ aarch64_linux_record_tdep.size__old_kernel_stat = 32;
+ aarch64_linux_record_tdep.size_tms = 32;
+ aarch64_linux_record_tdep.size_loff_t = 8;
+ 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 = 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_timezone = 8;
+ 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_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_int
+ = gdbarch_int_bit (gdbarch) / TARGET_CHAR_BIT;
+ aarch64_linux_record_tdep.size_long
+ = gdbarch_long_bit (gdbarch) / TARGET_CHAR_BIT;
+ aarch64_linux_record_tdep.size_ulong
+ = gdbarch_long_bit (gdbarch) / TARGET_CHAR_BIT;
+ aarch64_linux_record_tdep.size_msghdr = 56;
+ aarch64_linux_record_tdep.size_itimerval = 32;
+ aarch64_linux_record_tdep.size_stat = 144;
+ aarch64_linux_record_tdep.size_old_utsname = 325;
+ aarch64_linux_record_tdep.size_sysinfo = 112;
+ aarch64_linux_record_tdep.size_msqid_ds = 120;
+ aarch64_linux_record_tdep.size_shmid_ds = 112;
+ aarch64_linux_record_tdep.size_new_utsname = 390;
+ aarch64_linux_record_tdep.size_timex = 208;
+ aarch64_linux_record_tdep.size_mem_dqinfo = 24;
+ aarch64_linux_record_tdep.size_if_dqblk = 72;
+ aarch64_linux_record_tdep.size_fs_quota_stat = 80;
+ aarch64_linux_record_tdep.size_timespec = 16;
+ aarch64_linux_record_tdep.size_pollfd = 8;
+ 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 = 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_off_t = 8;
+ aarch64_linux_record_tdep.size_stat64 = 144;
+ aarch64_linux_record_tdep.size_gid_t = 4;
+ aarch64_linux_record_tdep.size_uid_t = 4;
+ aarch64_linux_record_tdep.size_PAGE_SIZE = 4096;
+ aarch64_linux_record_tdep.size_flock64 = 32;
+ aarch64_linux_record_tdep.size_user_desc = 16;
+ aarch64_linux_record_tdep.size_io_event = 32;
+ aarch64_linux_record_tdep.size_iocb = 64;
+ 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_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_serial_struct = 72;
+ aarch64_linux_record_tdep.size_serial_icounter_struct = 80;
+ 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. */
+ aarch64_linux_record_tdep.ioctl_TCGETS = 0x5401;
+ aarch64_linux_record_tdep.ioctl_TCSETS = 0x5402;
+ aarch64_linux_record_tdep.ioctl_TCSETSW = 0x5403;
+ aarch64_linux_record_tdep.ioctl_TCSETSF = 0x5404;
+ aarch64_linux_record_tdep.ioctl_TCGETA = 0x5405;
+ aarch64_linux_record_tdep.ioctl_TCSETA = 0x5406;
+ aarch64_linux_record_tdep.ioctl_TCSETAW = 0x5407;
+ aarch64_linux_record_tdep.ioctl_TCSETAF = 0x5408;
+ aarch64_linux_record_tdep.ioctl_TCSBRK = 0x5409;
+ aarch64_linux_record_tdep.ioctl_TCXONC = 0x540a;
+ aarch64_linux_record_tdep.ioctl_TCFLSH = 0x540b;
+ aarch64_linux_record_tdep.ioctl_TIOCEXCL = 0x540c;
+ aarch64_linux_record_tdep.ioctl_TIOCNXCL = 0x540d;
+ aarch64_linux_record_tdep.ioctl_TIOCSCTTY = 0x540e;
+ aarch64_linux_record_tdep.ioctl_TIOCGPGRP = 0x540f;
+ aarch64_linux_record_tdep.ioctl_TIOCSPGRP = 0x5410;
+ aarch64_linux_record_tdep.ioctl_TIOCOUTQ = 0x5411;
+ aarch64_linux_record_tdep.ioctl_TIOCSTI = 0x5412;
+ aarch64_linux_record_tdep.ioctl_TIOCGWINSZ = 0x5413;
+ aarch64_linux_record_tdep.ioctl_TIOCSWINSZ = 0x5414;
+ aarch64_linux_record_tdep.ioctl_TIOCMGET = 0x5415;
+ aarch64_linux_record_tdep.ioctl_TIOCMBIS = 0x5416;
+ aarch64_linux_record_tdep.ioctl_TIOCMBIC = 0x5417;
+ aarch64_linux_record_tdep.ioctl_TIOCMSET = 0x5418;
+ aarch64_linux_record_tdep.ioctl_TIOCGSOFTCAR = 0x5419;
+ aarch64_linux_record_tdep.ioctl_TIOCSSOFTCAR = 0x541a;
+ aarch64_linux_record_tdep.ioctl_FIONREAD = 0x541b;
+ aarch64_linux_record_tdep.ioctl_TIOCINQ = 0x541b;
+ aarch64_linux_record_tdep.ioctl_TIOCLINUX = 0x541c;
+ aarch64_linux_record_tdep.ioctl_TIOCCONS = 0x541d;
+ aarch64_linux_record_tdep.ioctl_TIOCGSERIAL = 0x541e;
+ aarch64_linux_record_tdep.ioctl_TIOCSSERIAL = 0x541f;
+ aarch64_linux_record_tdep.ioctl_TIOCPKT = 0x5420;
+ aarch64_linux_record_tdep.ioctl_FIONBIO = 0x5421;
+ aarch64_linux_record_tdep.ioctl_TIOCNOTTY = 0x5422;
+ aarch64_linux_record_tdep.ioctl_TIOCSETD = 0x5423;
+ aarch64_linux_record_tdep.ioctl_TIOCGETD = 0x5424;
+ aarch64_linux_record_tdep.ioctl_TCSBRKP = 0x5425;
+ aarch64_linux_record_tdep.ioctl_TIOCTTYGSTRUCT = 0x5426;
+ aarch64_linux_record_tdep.ioctl_TIOCSBRK = 0x5427;
+ aarch64_linux_record_tdep.ioctl_TIOCCBRK = 0x5428;
+ aarch64_linux_record_tdep.ioctl_TIOCGSID = 0x5429;
+ aarch64_linux_record_tdep.ioctl_TCGETS2 = 0x802c542a;
+ aarch64_linux_record_tdep.ioctl_TCSETS2 = 0x402c542b;
+ aarch64_linux_record_tdep.ioctl_TCSETSW2 = 0x402c542c;
+ aarch64_linux_record_tdep.ioctl_TCSETSF2 = 0x402c542d;
+ aarch64_linux_record_tdep.ioctl_TIOCGPTN = 0x80045430;
+ aarch64_linux_record_tdep.ioctl_TIOCSPTLCK = 0x40045431;
+ aarch64_linux_record_tdep.ioctl_FIONCLEX = 0x5450;
+ aarch64_linux_record_tdep.ioctl_FIOCLEX = 0x5451;
+ aarch64_linux_record_tdep.ioctl_FIOASYNC = 0x5452;
+ aarch64_linux_record_tdep.ioctl_TIOCSERCONFIG = 0x5453;
+ aarch64_linux_record_tdep.ioctl_TIOCSERGWILD = 0x5454;
+ aarch64_linux_record_tdep.ioctl_TIOCSERSWILD = 0x5455;
+ aarch64_linux_record_tdep.ioctl_TIOCGLCKTRMIOS = 0x5456;
+ aarch64_linux_record_tdep.ioctl_TIOCSLCKTRMIOS = 0x5457;
+ aarch64_linux_record_tdep.ioctl_TIOCSERGSTRUCT = 0x5458;
+ aarch64_linux_record_tdep.ioctl_TIOCSERGETLSR = 0x5459;
+ aarch64_linux_record_tdep.ioctl_TIOCSERGETMULTI = 0x545a;
+ aarch64_linux_record_tdep.ioctl_TIOCSERSETMULTI = 0x545b;
+ aarch64_linux_record_tdep.ioctl_TIOCMIWAIT = 0x545c;
+ aarch64_linux_record_tdep.ioctl_TIOCGICOUNT = 0x545d;
+ aarch64_linux_record_tdep.ioctl_TIOCGHAYESESP = 0x545e;
+ aarch64_linux_record_tdep.ioctl_TIOCSHAYESESP = 0x545f;
+ aarch64_linux_record_tdep.ioctl_FIOQSIZE = 0x5460;
+
+ /* These values are the second argument of system call "sys_fcntl"
+ and "sys_fcntl64". They are obtained from Linux Kernel source. */
+ aarch64_linux_record_tdep.fcntl_F_GETLK = 5;
+ aarch64_linux_record_tdep.fcntl_F_GETLK64 = 12;
+ aarch64_linux_record_tdep.fcntl_F_SETLK64 = 13;
+ aarch64_linux_record_tdep.fcntl_F_SETLKW64 = 14;
+
+ /* The AArch64 syscall calling convention: reg x0-x6 for arguments,
+ reg x8 for syscall number and return value in reg x0. */
+ aarch64_linux_record_tdep.arg1 = AARCH64_X0_REGNUM + 0;
+ aarch64_linux_record_tdep.arg2 = AARCH64_X0_REGNUM + 1;
+ aarch64_linux_record_tdep.arg3 = AARCH64_X0_REGNUM + 2;
+ aarch64_linux_record_tdep.arg4 = AARCH64_X0_REGNUM + 3;
+ aarch64_linux_record_tdep.arg5 = AARCH64_X0_REGNUM + 4;
+ aarch64_linux_record_tdep.arg6 = AARCH64_X0_REGNUM + 5;
+ aarch64_linux_record_tdep.arg7 = AARCH64_X0_REGNUM + 6;
+
+ /* `catch syscall' */
+ set_xml_syscall_file_name (gdbarch, "syscalls/aarch64-linux.xml");
+ set_gdbarch_get_syscall_number (gdbarch, aarch64_linux_get_syscall_number);
+
+ 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