return 0;
}
-/* Get Linux/x86 target description from running target.
-
- Value of CS segment register:
- 1. 64bit process: 0x33.
- 2. 32bit process: 0x23.
-
- Value of DS segment register:
- 1. LP64 process: 0x0.
- 2. X32 process: 0x2b.
- */
+#ifdef __x86_64__
+/* Value of CS segment register:
+ 64bit process: 0x33
+ 32bit process: 0x23 */
+#define AMD64_LINUX_USER64_CS 0x33
+
+/* Value of DS segment register:
+ LP64 process: 0x0
+ X32 process: 0x2b */
+#define AMD64_LINUX_X32_DS 0x2b
+#endif
-#define AMD64_LINUX_USER64_CS 0x33
-#define AMD64_LINUX_X32_DS 0x2b
+/* Get Linux/x86 target description from running target. */
static const struct target_desc *
-amd64_linux_read_description (struct target_ops *ops)
+x86_linux_read_description (struct target_ops *ops)
{
- unsigned long cs;
- unsigned long ds;
int tid;
- int is_64bit;
+ int is_64bit = 0;
+#ifdef __x86_64__
int is_x32;
+#endif
static uint64_t xcr0;
+ uint64_t xcr0_features_bits;
/* GNU/Linux LWP ID's are process ID's. */
tid = ptid_get_lwp (inferior_ptid);
if (tid == 0)
tid = ptid_get_pid (inferior_ptid); /* Not a threaded program. */
- /* Get CS register. */
- errno = 0;
- cs = ptrace (PTRACE_PEEKUSER, tid,
- offsetof (struct user_regs_struct, cs), 0);
- if (errno != 0)
- perror_with_name (_("Couldn't get CS register"));
-
- is_64bit = cs == AMD64_LINUX_USER64_CS;
-
- /* Get DS register. */
- errno = 0;
- ds = ptrace (PTRACE_PEEKUSER, tid,
- offsetof (struct user_regs_struct, ds), 0);
- if (errno != 0)
- perror_with_name (_("Couldn't get DS register"));
-
- is_x32 = ds == AMD64_LINUX_X32_DS;
+#ifdef __x86_64__
+ {
+ unsigned long cs;
+ unsigned long ds;
+
+ /* Get CS register. */
+ errno = 0;
+ cs = ptrace (PTRACE_PEEKUSER, tid,
+ offsetof (struct user_regs_struct, cs), 0);
+ if (errno != 0)
+ perror_with_name (_("Couldn't get CS register"));
+
+ is_64bit = cs == AMD64_LINUX_USER64_CS;
+
+ /* Get DS register. */
+ errno = 0;
+ ds = ptrace (PTRACE_PEEKUSER, tid,
+ offsetof (struct user_regs_struct, ds), 0);
+ if (errno != 0)
+ perror_with_name (_("Couldn't get DS register"));
+
+ is_x32 = ds == AMD64_LINUX_X32_DS;
+
+ if (sizeof (void *) == 4 && is_64bit && !is_x32)
+ error (_("Can't debug 64-bit process with 32-bit GDB"));
+ }
+#elif HAVE_PTRACE_GETFPXREGS
+ if (have_ptrace_getfpxregs == -1)
+ {
+ elf_fpxregset_t fpxregs;
- if (sizeof (void *) == 4 && is_64bit && !is_x32)
- error (_("Can't debug 64-bit process with 32-bit GDB"));
+ if (ptrace (PTRACE_GETFPXREGS, tid, 0, (int) &fpxregs) < 0)
+ {
+ have_ptrace_getfpxregs = 0;
+ have_ptrace_getregset = 0;
+ return tdesc_i386_mmx_linux;
+ }
+ }
+#endif
if (have_ptrace_getregset == -1)
{
/* Check if PTRACE_GETREGSET works. */
if (ptrace (PTRACE_GETREGSET, tid,
- (unsigned int) NT_X86_XSTATE, (long) &iov) < 0)
+ (unsigned int) NT_X86_XSTATE, &iov) < 0)
have_ptrace_getregset = 0;
else
{
}
}
- /* Check the native XCR0 only if PTRACE_GETREGSET is available. */
- if (have_ptrace_getregset && (xcr0 & I386_XSTATE_ALL_MASK))
+ /* Check the native XCR0 only if PTRACE_GETREGSET is available. If
+ PTRACE_GETREGSET is not available then set xcr0_features_bits to
+ zero so that the "no-features" descriptions are returned by the
+ switches below. */
+ if (have_ptrace_getregset)
+ xcr0_features_bits = xcr0 & I386_XSTATE_ALL_MASK;
+ else
+ xcr0_features_bits = 0;
+
+ if (is_64bit)
{
- switch (xcr0 & I386_XSTATE_ALL_MASK)
+#ifdef __x86_64__
+ switch (xcr0_features_bits)
{
- case I386_XSTATE_MPX_AVX512_MASK:
- case I386_XSTATE_AVX512_MASK:
- if (is_64bit)
- {
- if (is_x32)
- return tdesc_x32_avx512_linux;
- else
- return tdesc_amd64_avx512_linux;
- }
- else
- return tdesc_i386_avx512_linux;
+ case I386_XSTATE_MPX_AVX512_MASK:
+ case I386_XSTATE_AVX512_MASK:
+ if (is_x32)
+ return tdesc_x32_avx512_linux;
+ else
+ return tdesc_amd64_avx512_linux;
case I386_XSTATE_MPX_MASK:
- if (is_64bit)
- {
- if (is_x32)
- return tdesc_x32_avx_linux; /* No MPX on x32 using AVX. */
- else
- return tdesc_amd64_mpx_linux;
- }
+ if (is_x32)
+ return tdesc_x32_avx_linux; /* No MPX on x32 using AVX. */
else
- return tdesc_i386_mpx_linux;
+ return tdesc_amd64_mpx_linux;
case I386_XSTATE_AVX_MASK:
- if (is_64bit)
- {
- if (is_x32)
- return tdesc_x32_avx_linux;
- else
- return tdesc_amd64_avx_linux;
- }
+ if (is_x32)
+ return tdesc_x32_avx_linux;
else
- return tdesc_i386_avx_linux;
+ return tdesc_amd64_avx_linux;
default:
- if (is_64bit)
- {
- if (is_x32)
- return tdesc_x32_linux;
- else
- return tdesc_amd64_linux;
- }
+ if (is_x32)
+ return tdesc_x32_linux;
else
- return tdesc_i386_linux;
+ return tdesc_amd64_linux;
}
+#endif
}
else
{
- if (is_64bit)
+ switch (xcr0_features_bits)
{
- if (is_x32)
- return tdesc_x32_linux;
- else
- return tdesc_amd64_linux;
+ case I386_XSTATE_MPX_AVX512_MASK:
+ case I386_XSTATE_AVX512_MASK:
+ return tdesc_i386_avx512_linux;
+ case I386_XSTATE_MPX_MASK:
+ return tdesc_i386_mpx_linux;
+ case I386_XSTATE_AVX_MASK:
+ return tdesc_i386_avx_linux;
+ default:
+ return tdesc_i386_linux;
}
- else
- return tdesc_i386_linux;
}
+
+ gdb_assert_not_reached ("failed to return tdesc");
}
/* Enable branch tracing. */
t->to_fetch_registers = amd64_linux_fetch_inferior_registers;
t->to_store_registers = amd64_linux_store_inferior_registers;
- t->to_read_description = amd64_linux_read_description;
+ t->to_read_description = x86_linux_read_description;
/* Add btrace methods. */
t->to_supports_btrace = linux_supports_btrace;
super_post_startup_inferior (self, ptid);
}
+#ifdef __x86_64__
+/* Value of CS segment register:
+ 64bit process: 0x33
+ 32bit process: 0x23 */
+#define AMD64_LINUX_USER64_CS 0x33
+
+/* Value of DS segment register:
+ LP64 process: 0x0
+ X32 process: 0x2b */
+#define AMD64_LINUX_X32_DS 0x2b
+#endif
+
/* Get Linux/x86 target description from running target. */
static const struct target_desc *
-i386_linux_read_description (struct target_ops *ops)
+x86_linux_read_description (struct target_ops *ops)
{
int tid;
+ int is_64bit = 0;
+#ifdef __x86_64__
+ int is_x32;
+#endif
static uint64_t xcr0;
+ uint64_t xcr0_features_bits;
/* GNU/Linux LWP ID's are process ID's. */
tid = ptid_get_lwp (inferior_ptid);
if (tid == 0)
tid = ptid_get_pid (inferior_ptid); /* Not a threaded program. */
-#ifdef HAVE_PTRACE_GETFPXREGS
+#ifdef __x86_64__
+ {
+ unsigned long cs;
+ unsigned long ds;
+
+ /* Get CS register. */
+ errno = 0;
+ cs = ptrace (PTRACE_PEEKUSER, tid,
+ offsetof (struct user_regs_struct, cs), 0);
+ if (errno != 0)
+ perror_with_name (_("Couldn't get CS register"));
+
+ is_64bit = cs == AMD64_LINUX_USER64_CS;
+
+ /* Get DS register. */
+ errno = 0;
+ ds = ptrace (PTRACE_PEEKUSER, tid,
+ offsetof (struct user_regs_struct, ds), 0);
+ if (errno != 0)
+ perror_with_name (_("Couldn't get DS register"));
+
+ is_x32 = ds == AMD64_LINUX_X32_DS;
+
+ if (sizeof (void *) == 4 && is_64bit && !is_x32)
+ error (_("Can't debug 64-bit process with 32-bit GDB"));
+ }
+#elif HAVE_PTRACE_GETFPXREGS
if (have_ptrace_getfpxregs == -1)
{
elf_fpxregset_t fpxregs;
iov.iov_len = sizeof (xstateregs);
/* Check if PTRACE_GETREGSET works. */
- if (ptrace (PTRACE_GETREGSET, tid, (unsigned int) NT_X86_XSTATE,
- &iov) < 0)
+ if (ptrace (PTRACE_GETREGSET, tid,
+ (unsigned int) NT_X86_XSTATE, &iov) < 0)
have_ptrace_getregset = 0;
else
{
/* Get XCR0 from XSAVE extended state. */
xcr0 = xstateregs[(I386_LINUX_XSAVE_XCR0_OFFSET
- / sizeof (long long))];
+ / sizeof (uint64_t))];
}
}
- /* Check the native XCR0 only if PTRACE_GETREGSET is available. */
+ /* Check the native XCR0 only if PTRACE_GETREGSET is available. If
+ PTRACE_GETREGSET is not available then set xcr0_features_bits to
+ zero so that the "no-features" descriptions are returned by the
+ switches below. */
if (have_ptrace_getregset)
+ xcr0_features_bits = xcr0 & I386_XSTATE_ALL_MASK;
+ else
+ xcr0_features_bits = 0;
+
+ if (is_64bit)
{
- switch ((xcr0 & I386_XSTATE_ALL_MASK))
+#ifdef __x86_64__
+ switch (xcr0_features_bits)
+ {
+ case I386_XSTATE_MPX_AVX512_MASK:
+ case I386_XSTATE_AVX512_MASK:
+ if (is_x32)
+ return tdesc_x32_avx512_linux;
+ else
+ return tdesc_amd64_avx512_linux;
+ case I386_XSTATE_MPX_MASK:
+ if (is_x32)
+ return tdesc_x32_avx_linux; /* No MPX on x32 using AVX. */
+ else
+ return tdesc_amd64_mpx_linux;
+ case I386_XSTATE_AVX_MASK:
+ if (is_x32)
+ return tdesc_x32_avx_linux;
+ else
+ return tdesc_amd64_avx_linux;
+ default:
+ if (is_x32)
+ return tdesc_x32_linux;
+ else
+ return tdesc_amd64_linux;
+ }
+#endif
+ }
+ else
+ {
+ switch (xcr0_features_bits)
{
case I386_XSTATE_MPX_AVX512_MASK:
case I386_XSTATE_AVX512_MASK:
return tdesc_i386_linux;
}
}
- else
- return tdesc_i386_linux;
+
+ gdb_assert_not_reached ("failed to return tdesc");
}
/* Enable branch tracing. */
t->to_fetch_registers = i386_linux_fetch_inferior_registers;
t->to_store_registers = i386_linux_store_inferior_registers;
- t->to_read_description = i386_linux_read_description;
+ t->to_read_description = x86_linux_read_description;
/* Add btrace methods. */
t->to_supports_btrace = linux_supports_btrace;
projects / deliverable / binutils-gdb.git / commitdiff
