/* GNU/Linux/AArch64 specific low level interface, for the remote server for
GDB.
- Copyright (C) 2009-2016 Free Software Foundation, Inc.
+ Copyright (C) 2009-2020 Free Software Foundation, Inc.
Contributed by ARM Ltd.
This file is part of GDB.
#include "elf/common.h"
#include "ax.h"
#include "tracepoint.h"
+#include "debug.h"
#include <signal.h>
#include <sys/user.h>
#include <sys/uio.h>
#include "gdb_proc_service.h"
-
-/* Defined in auto-generated files. */
-void init_registers_aarch64 (void);
-extern const struct target_desc *tdesc_aarch64;
+#include "arch/aarch64.h"
+#include "linux-aarch32-tdesc.h"
+#include "linux-aarch64-tdesc.h"
+#include "nat/aarch64-sve-linux-ptrace.h"
+#include "tdesc.h"
#ifdef HAVE_SYS_REG_H
#include <sys/reg.h>
#endif
-#define AARCH64_X_REGS_NUM 31
-#define AARCH64_V_REGS_NUM 32
-#define AARCH64_X0_REGNO 0
-#define AARCH64_SP_REGNO 31
-#define AARCH64_PC_REGNO 32
-#define AARCH64_CPSR_REGNO 33
-#define AARCH64_V0_REGNO 34
-#define AARCH64_FPSR_REGNO (AARCH64_V0_REGNO + AARCH64_V_REGS_NUM)
-#define AARCH64_FPCR_REGNO (AARCH64_V0_REGNO + AARCH64_V_REGS_NUM + 1)
-
-#define AARCH64_NUM_REGS (AARCH64_V0_REGNO + AARCH64_V_REGS_NUM + 2)
-
/* Per-process arch-specific data we want to keep. */
struct arch_process_info
return register_size (regcache->tdesc, 0) == 8;
}
-/* Implementation of linux_target_ops method "cannot_store_register". */
+/* Return true if the regcache contains the number of SVE registers. */
-static int
-aarch64_cannot_store_register (int regno)
+static bool
+is_sve_tdesc (void)
{
- return regno >= AARCH64_NUM_REGS;
-}
-
-/* Implementation of linux_target_ops method "cannot_fetch_register". */
+ struct regcache *regcache = get_thread_regcache (current_thread, 0);
-static int
-aarch64_cannot_fetch_register (int regno)
-{
- return regno >= AARCH64_NUM_REGS;
+ return tdesc_contains_feature (regcache->tdesc, "org.gnu.gdb.aarch64.sve");
}
static void
int i;
for (i = 0; i < AARCH64_X_REGS_NUM; i++)
- collect_register (regcache, AARCH64_X0_REGNO + i, ®set->regs[i]);
- collect_register (regcache, AARCH64_SP_REGNO, ®set->sp);
- collect_register (regcache, AARCH64_PC_REGNO, ®set->pc);
- collect_register (regcache, AARCH64_CPSR_REGNO, ®set->pstate);
+ collect_register (regcache, AARCH64_X0_REGNUM + i, ®set->regs[i]);
+ collect_register (regcache, AARCH64_SP_REGNUM, ®set->sp);
+ collect_register (regcache, AARCH64_PC_REGNUM, ®set->pc);
+ collect_register (regcache, AARCH64_CPSR_REGNUM, ®set->pstate);
}
static void
int i;
for (i = 0; i < AARCH64_X_REGS_NUM; i++)
- supply_register (regcache, AARCH64_X0_REGNO + i, ®set->regs[i]);
- supply_register (regcache, AARCH64_SP_REGNO, ®set->sp);
- supply_register (regcache, AARCH64_PC_REGNO, ®set->pc);
- supply_register (regcache, AARCH64_CPSR_REGNO, ®set->pstate);
+ supply_register (regcache, AARCH64_X0_REGNUM + i, ®set->regs[i]);
+ supply_register (regcache, AARCH64_SP_REGNUM, ®set->sp);
+ supply_register (regcache, AARCH64_PC_REGNUM, ®set->pc);
+ supply_register (regcache, AARCH64_CPSR_REGNUM, ®set->pstate);
}
static void
int i;
for (i = 0; i < AARCH64_V_REGS_NUM; i++)
- collect_register (regcache, AARCH64_V0_REGNO + i, ®set->vregs[i]);
- collect_register (regcache, AARCH64_FPSR_REGNO, ®set->fpsr);
- collect_register (regcache, AARCH64_FPCR_REGNO, ®set->fpcr);
+ collect_register (regcache, AARCH64_V0_REGNUM + i, ®set->vregs[i]);
+ collect_register (regcache, AARCH64_FPSR_REGNUM, ®set->fpsr);
+ collect_register (regcache, AARCH64_FPCR_REGNUM, ®set->fpcr);
}
static void
int i;
for (i = 0; i < AARCH64_V_REGS_NUM; i++)
- supply_register (regcache, AARCH64_V0_REGNO + i, ®set->vregs[i]);
- supply_register (regcache, AARCH64_FPSR_REGNO, ®set->fpsr);
- supply_register (regcache, AARCH64_FPCR_REGNO, ®set->fpcr);
+ supply_register (regcache, AARCH64_V0_REGNUM + i, ®set->vregs[i]);
+ supply_register (regcache, AARCH64_FPSR_REGNUM, ®set->fpsr);
+ supply_register (regcache, AARCH64_FPCR_REGNUM, ®set->fpcr);
}
-/* Enable miscellaneous debugging output. The name is historical - it
- was originally used to debug LinuxThreads support. */
-extern int debug_threads;
+/* Store the pauth registers to regcache. */
+
+static void
+aarch64_store_pauthregset (struct regcache *regcache, const void *buf)
+{
+ uint64_t *pauth_regset = (uint64_t *) buf;
+ int pauth_base = find_regno (regcache->tdesc, "pauth_dmask");
+
+ if (pauth_base == 0)
+ return;
+
+ supply_register (regcache, AARCH64_PAUTH_DMASK_REGNUM (pauth_base),
+ &pauth_regset[0]);
+ supply_register (regcache, AARCH64_PAUTH_CMASK_REGNUM (pauth_base),
+ &pauth_regset[1]);
+}
/* Implementation of linux_target_ops method "get_pc". */
state = aarch64_get_debug_reg_state (pid_of (current_thread));
for (i = aarch64_num_wp_regs - 1; i >= 0; --i)
{
+ const unsigned int offset
+ = aarch64_watchpoint_offset (state->dr_ctrl_wp[i]);
const unsigned int len = aarch64_watchpoint_length (state->dr_ctrl_wp[i]);
const CORE_ADDR addr_trap = (CORE_ADDR) siginfo.si_addr;
- const CORE_ADDR addr_watch = state->dr_addr_wp[i];
+ const CORE_ADDR addr_watch = state->dr_addr_wp[i] + offset;
+ const CORE_ADDR addr_watch_aligned = align_down (state->dr_addr_wp[i], 8);
+ const CORE_ADDR addr_orig = state->dr_addr_orig_wp[i];
+
if (state->dr_ref_count_wp[i]
&& DR_CONTROL_ENABLED (state->dr_ctrl_wp[i])
- && addr_trap >= addr_watch
+ && addr_trap >= addr_watch_aligned
&& addr_trap < addr_watch + len)
- return addr_trap;
+ {
+ /* ADDR_TRAP reports the first address of the memory range
+ accessed by the CPU, regardless of what was the memory
+ range watched. Thus, a large CPU access that straddles
+ the ADDR_WATCH..ADDR_WATCH+LEN range may result in an
+ ADDR_TRAP that is lower than the
+ ADDR_WATCH..ADDR_WATCH+LEN range. E.g.:
+
+ addr: | 4 | 5 | 6 | 7 | 8 |
+ |---- range watched ----|
+ |----------- range accessed ------------|
+
+ In this case, ADDR_TRAP will be 4.
+
+ To match a watchpoint known to GDB core, we must never
+ report *ADDR_P outside of any ADDR_WATCH..ADDR_WATCH+LEN
+ range. ADDR_WATCH <= ADDR_TRAP < ADDR_ORIG is a false
+ positive on kernels older than 4.10. See PR
+ external/20207. */
+ return addr_orig;
+ }
}
return (CORE_ADDR) 0;
return 0;
}
-/* Implementation of linux_target_ops method "linux_new_process". */
+/* Implementation of linux_target_ops method "new_process". */
static struct arch_process_info *
aarch64_linux_new_process (void)
return info;
}
+/* Implementation of linux_target_ops method "delete_process". */
+
+static void
+aarch64_linux_delete_process (struct arch_process_info *info)
+{
+ xfree (info);
+}
+
/* Implementation of linux_target_ops method "linux_new_fork". */
static void
*child->priv->arch_private = *parent->priv->arch_private;
}
-/* Return the right target description according to the ELF file of
- current thread. */
+/* Matches HWCAP_PACA in kernel header arch/arm64/include/uapi/asm/hwcap.h. */
+#define AARCH64_HWCAP_PACA (1 << 30)
-static const struct target_desc *
-aarch64_linux_read_description (void)
+/* Implementation of linux_target_ops method "arch_setup". */
+
+static void
+aarch64_arch_setup (void)
{
unsigned int machine;
int is_elf64;
is_elf64 = linux_pid_exe_is_elf_64_file (tid, &machine);
if (is_elf64)
- return tdesc_aarch64;
+ {
+ uint64_t vq = aarch64_sve_get_vq (tid);
+ unsigned long hwcap = linux_get_hwcap (8);
+ bool pauth_p = hwcap & AARCH64_HWCAP_PACA;
+
+ current_process ()->tdesc = aarch64_linux_read_description (vq, pauth_p);
+ }
else
- return tdesc_arm_with_neon;
+ current_process ()->tdesc = aarch32_linux_read_description ();
+
+ aarch64_linux_get_debug_reg_capacity (lwpid_of (current_thread));
}
-/* Implementation of linux_target_ops method "arch_setup". */
+/* Wrapper for aarch64_sve_regs_copy_to_reg_buf. */
static void
-aarch64_arch_setup (void)
+aarch64_sve_regs_copy_to_regcache (struct regcache *regcache, const void *buf)
{
- current_process ()->tdesc = aarch64_linux_read_description ();
+ return aarch64_sve_regs_copy_to_reg_buf (regcache, buf);
+}
- aarch64_linux_get_debug_reg_capacity (lwpid_of (current_thread));
+/* Wrapper for aarch64_sve_regs_copy_from_reg_buf. */
+
+static void
+aarch64_sve_regs_copy_from_regcache (struct regcache *regcache, void *buf)
+{
+ return aarch64_sve_regs_copy_from_reg_buf (regcache, buf);
}
static struct regset_info aarch64_regsets[] =
sizeof (struct user_fpsimd_state), FP_REGS,
aarch64_fill_fpregset, aarch64_store_fpregset
},
+ { PTRACE_GETREGSET, PTRACE_SETREGSET, NT_ARM_PAC_MASK,
+ AARCH64_PAUTH_REGS_SIZE, OPTIONAL_REGS,
+ NULL, aarch64_store_pauthregset },
NULL_REGSET
};
&aarch64_regsets_info,
};
+static struct regset_info aarch64_sve_regsets[] =
+{
+ { PTRACE_GETREGSET, PTRACE_SETREGSET, NT_PRSTATUS,
+ sizeof (struct user_pt_regs), GENERAL_REGS,
+ aarch64_fill_gregset, aarch64_store_gregset },
+ { PTRACE_GETREGSET, PTRACE_SETREGSET, NT_ARM_SVE,
+ SVE_PT_SIZE (AARCH64_MAX_SVE_VQ, SVE_PT_REGS_SVE), EXTENDED_REGS,
+ aarch64_sve_regs_copy_from_regcache, aarch64_sve_regs_copy_to_regcache
+ },
+ { PTRACE_GETREGSET, PTRACE_SETREGSET, NT_ARM_PAC_MASK,
+ AARCH64_PAUTH_REGS_SIZE, OPTIONAL_REGS,
+ NULL, aarch64_store_pauthregset },
+ NULL_REGSET
+};
+
+static struct regsets_info aarch64_sve_regsets_info =
+ {
+ aarch64_sve_regsets, /* regsets. */
+ 0, /* num_regsets. */
+ NULL, /* disabled_regsets. */
+ };
+
+static struct regs_info regs_info_aarch64_sve =
+ {
+ NULL, /* regset_bitmap. */
+ NULL, /* usrregs. */
+ &aarch64_sve_regsets_info,
+ };
+
/* Implementation of linux_target_ops method "regs_info". */
static const struct regs_info *
aarch64_regs_info (void)
{
- if (is_64bit_tdesc ())
- return ®s_info_aarch64;
- else
+ if (!is_64bit_tdesc ())
return ®s_info_aarch32;
+
+ if (is_sve_tdesc ())
+ return ®s_info_aarch64_sve;
+
+ return ®s_info_aarch64;
}
/* Implementation of linux_target_ops method "supports_tracepoints". */
{
size_t byte_len = len * sizeof (uint32_t);
#if (__BYTE_ORDER == __BIG_ENDIAN)
- uint32_t *le_buf = xmalloc (byte_len);
+ uint32_t *le_buf = (uint32_t *) xmalloc (byte_len);
size_t i;
for (i = 0; i < len; i++)
le_buf[i] = htole32 (buf[i]);
- write_inferior_memory (*to, (const unsigned char *) le_buf, byte_len);
+ target_write_memory (*to, (const unsigned char *) le_buf, byte_len);
xfree (le_buf);
#else
- write_inferior_memory (*to, (const unsigned char *) buf, byte_len);
+ target_write_memory (*to, (const unsigned char *) buf, byte_len);
#endif
*to += byte_len;
for (i = 30; i >= 0; i -= 2)
p += emit_stp_q_offset (p, i, i + 1, sp, i * 16);
- /* Push general puspose registers on the stack. Note that we do not need
+ /* Push general purpose registers on the stack. Note that we do not need
to push x31 as it represents the xzr register and not the stack
pointer in a STR instruction.
; This instruction is a normal store with memory ordering
; constraints. Thanks to this we do not have to put a data
; barrier instruction to make sure all data read and writes are done
- ; before this instruction is executed. Furthermore, this instrucion
+ ; before this instruction is executed. Furthermore, this instruction
; will trigger an event, letting other threads know they can grab
; the lock.
STLR xzr, [x0]
the current stack pointer in the frame pointer. This way, it is not
clobbered when calling C functions.
- Finally, throughtout every operation, we are using register x0 as the
+ Finally, throughout every operation, we are using register x0 as the
top of the stack, and x1 as a scratch register. */
p += emit_stp (p, x0, x1, sp, preindex_memory_operand (-2 * 16));
{
aarch64_arch_setup,
aarch64_regs_info,
- aarch64_cannot_fetch_register,
- aarch64_cannot_store_register,
+ NULL, /* cannot_fetch_register */
+ NULL, /* cannot_store_register */
NULL, /* fetch_register */
aarch64_get_pc,
aarch64_set_pc,
NULL, /* supply_ptrace_register */
aarch64_linux_siginfo_fixup,
aarch64_linux_new_process,
+ aarch64_linux_delete_process,
aarch64_linux_new_thread,
+ aarch64_linux_delete_thread,
aarch64_linux_new_fork,
aarch64_linux_prepare_to_resume,
NULL, /* process_qsupported */
void
initialize_low_arch (void)
{
- init_registers_aarch64 ();
-
initialize_low_arch_aarch32 ();
initialize_regsets_info (&aarch64_regsets_info);
+ initialize_regsets_info (&aarch64_sve_regsets_info);
}
projects / deliverable / binutils-gdb.git / blobdiff