Support i386 AVX.

2010-04-07  H.J. Lu  <hongjiu.lu@intel.com>

	* i386-linux-nat.c: Include "regset.h", "elf/common.h",
	<sys/uio.h> and "i386-xstate.h".
	(PTRACE_GETREGSET): New.
	(PTRACE_SETREGSET): Likewise.
	(fetch_xstateregs): Likewise.
	(store_xstateregs): Likewise.
	(GETXSTATEREGS_SUPPLIES): Likewise.
	(regmap): Include 8 upper YMM registers.
	(i386_linux_fetch_inferior_registers): Support XSAVE extended
	state.
	(i386_linux_store_inferior_registers): Likewise.
	(i386_linux_read_description): Check and enable AVX target
	descriptions.

	* i386-linux-tdep.c: Include "regset.h", "i387-tdep.h",
	"i386-xstate.h" and "features/i386/i386-avx-linux.c".
	(i386_linux_regset_sections): Add ".reg-xstate".
	(i386_linux_gregset_reg_offset): Include 8 upper YMM registers.
	(i386_linux_core_read_xcr0): New.
	(i386_linux_core_read_description): Check and enable AVX target
	description.
	(i386_linux_init_abi): Set xsave_xcr0_offset.
	(_initialize_i386_linux_tdep): Call
	initialize_tdesc_i386_avx_linux.

	* i386-linux-tdep.h (I386_LINUX_ORIG_EAX_REGNUM): Replace
	I386_SSE_NUM_REGS with I386_AVX_NUM_REGS.
	(i386_linux_core_read_xcr0): New.
	(tdesc_i386_avx_linux): Likewise.
	(I386_LINUX_XSAVE_XCR0_OFFSET): Likewise.

	* i386-tdep.c: Include "i386-xstate.h" and
	"features/i386/i386-avx.c".
	(i386_ymm_names): New.
	(i386_ymmh_names): Likewise.
	(i386_ymmh_regnum_p): Likewise.
	(i386_ymm_regnum_p): Likewise.
	(i386_xmm_regnum_p): Likewise.
	(i386_register_name): Likewise.
	(i386_ymm_type): Likewise.
	(i386_supply_xstateregset): Likewise.
	(i386_collect_xstateregset): Likewise.
	(i386_sse_regnum_p): Removed.
	(i386_pseudo_register_name): Support pseudo YMM registers.
	(i386_pseudo_register_type): Likewise.
	(i386_pseudo_register_read): Likewise.
	(i386_pseudo_register_write): Likewise.
	(i386_dbx_reg_to_regnum): Return %ymmN register number for
	%xmmN if AVX is available.
	(i386_regset_from_core_section): Support .reg-xstate section.
	(i386_register_reggroup_p): Supper upper YMM and YMM registers.
	(i386_process_record): Replace i386_sse_regnum_p with
	i386_xmm_regnum_p.
	(i386_validate_tdesc_p): Support org.gnu.gdb.i386.avx feature.
	Set ymmh_register_names, num_ymm_regs, ymm0h_regnum and xcr0.
	(i386_gdbarch_init): Set xstateregset.  Set xsave_xcr0_offset.
	Call set_gdbarch_register_name.  Replace I386_SSE_NUM_REGS with
	I386_AVX_NUM_REGS.  Set ymmh_register_names, ymm0h_regnum and
	num_ymm_regs.  Add num_ymm_regs to set_gdbarch_num_pseudo_regs.
	Set ymm0_regnum.
	(_initialize_i386_tdep): Call initialize_tdesc_i386_avx.

	* i386-tdep.h (gdbarch_tdep): Add xstateregset, ymm0_regnum,
	xcr0, xsave_xcr0_offset, ymm0h_regnum, ymmh_register_names and
	i386_ymm_type.
	(i386_regnum): Add I386_YMM0H_REGNUM, and I386_YMM7H_REGNUM.
	(I386_AVX_NUM_REGS): New.
	(i386_xmm_regnum_p): Likewise.
	(i386_ymm_regnum_p): Likewise.
	(i386_ymmh_regnum_p): Likewise.

	* common/i386-xstate.h: New.

1 files changed, 27 insertions, 1 deletions

diff --git a/gdb/i386-linux-tdep.h b/gdb/i386-linux-tdep.h
index 11f7295..eaeb63c 100644
--- a/gdb/i386-linux-tdep.h
+++ b/gdb/i386-linux-tdep.h
@@ -30,12 +30,38 @@
 /* Register number for the "orig_eax" pseudo-register.  If this
    pseudo-register contains a value >= 0 it is interpreted as the
    system call number that the kernel is supposed to restart.  */
-#define I386_LINUX_ORIG_EAX_REGNUM I386_SSE_NUM_REGS
+#define I386_LINUX_ORIG_EAX_REGNUM I386_AVX_NUM_REGS
 
 /* Total number of registers for GNU/Linux.  */
 #define I386_LINUX_NUM_REGS (I386_LINUX_ORIG_EAX_REGNUM + 1)
 
+/* Get XSAVE extended state xcr0 from core dump.  */
+extern uint64_t i386_linux_core_read_xcr0
+  (struct gdbarch *gdbarch, struct target_ops *target, bfd *abfd);
+
 /* Linux target description.  */
 extern struct target_desc *tdesc_i386_linux;
+extern struct target_desc *tdesc_i386_avx_linux;
+
+/* Format of XSAVE extended state is:
+ 	struct
+	{
+	  fxsave_bytes[0..463]
+	  sw_usable_bytes[464..511]
+	  xstate_hdr_bytes[512..575]
+	  avx_bytes[576..831]
+	  future_state etc
+	};
+
+  Same memory layout will be used for the coredump NT_X86_XSTATE
+  representing the XSAVE extended state registers.
+
+  The first 8 bytes of the sw_usable_bytes[464..467] is the OS enabled
+  extended state mask, which is the same as the extended control register
+  0 (the XFEATURE_ENABLED_MASK register), XCR0.  We can use this mask
+  together with the mask saved in the xstate_hdr_bytes to determine what
+  states the processor/OS supports and what state, used or initialized,
+  the process/thread is in.  */ 
+#define I386_LINUX_XSAVE_XCR0_OFFSET 464
 
 #endif /* i386-linux-tdep.h */