2008-02-11 Maxim Grigoriev <maxim2405@gmail.com>

	* NEWS (New native configurations): Xtensa GNU/Linux.
	(New targets): Xtensa GNU/Linux.
	* Makefile.in (ALL_TARGET_OBS): Add xtensa-linux-nat.o and
	xtensa-linux-tdep.o
	(ALLDEPFILES): Add xtensa-linux-tdep.c and xtensa-linux-nat.c
	(xtensa-linux-nat.o, xtensa-linux-tdep.o): New dependencies.
	* configure.tgt (xtensa*-*-linux*): New entry.
	* xtensa-config.c (xtensa_tdep): New variable.
	(xtensa_config_byte_order, xtensa_config_tdep): Removed.
	(rmap): Change format based on new macro XTREG.
	(XTENSA_CONFIG_INSTANTIATE): Use new macro defined in xtensa-tdep.h.
	* xtensa-linux-nat.c: New.
	* xtensa-linux-tdep.c: New.
	* xtensa-xtregs.c: New.
	* xtensa-tdep.h (xtensa_elf_gregset_t): Update.
	(XTENSA_ELF_NGREG, XTREG, XTREG_END, XTENSA_GDBARCH_TDEP_INSTANTIATE)
	(XCHAL_NUM_CONTEXTS, XCHAL_HAVE_EXCEPTIONS): New macros.
	(xtensa_register_t): New field coprocessor.
	(XTENSA_REGISTER_FLAGS_PRIVILEGED): Name spelling corrected.
	* xtensa-tdep.c (xtensa_config_tdep, xtensa_config_byte_order): Removed.
	(xtensa_pseudo_register_read, xtensa_pseudo_register_write):
	Update to handle privileged registers.
	(xtensa_supply_gregset) Remove exccause and excvaddr registers.
	(xtensa_push_dummy_call): Set windowstart register correctly.
	(call0_analyze_prologue): Initialize xtensa_default_isa.
	(xtensa_derive_tdep): New.
	(xtensa_gdbarch_init): Get rid of xtensa_config_byte_order and
	xtensa_config_tdep, use XCHAL_HAVE_BE and xtensa_tdep instead.
	Call xtensa_derive_tdep().
	* config/xtensa/linux.mh: New.
	* regformats/reg-xtensa.dat: New.

1 files changed, 75 insertions, 14 deletions

diff --git a/gdb/xtensa-tdep.h b/gdb/xtensa-tdep.h
index a8f7c9f..dc3a646 100644
--- a/gdb/xtensa-tdep.h
+++ b/gdb/xtensa-tdep.h
@@ -59,6 +59,7 @@ typedef enum
   xtRegisterGroupVectra		= 0x0800,    /* Vectra.  */
   xtRegisterGroupSystem		= 0x1000,    /* System.  */
 
+  xtRegisterGroupNCP	    = 0x00800000,    /* Non-CP non-base opt/custom.  */
   xtRegisterGroupCP0	    = 0x01000000,    /* CP0.  */
   xtRegisterGroupCP1	    = 0x02000000,    /* CP1.  */
   xtRegisterGroupCP2	    = 0x04000000,    /* CP2.  */
@@ -87,24 +88,20 @@ typedef unsigned long xtensa_elf_greg_t;
 
 typedef struct
 {
-  xtensa_elf_greg_t xchal_config_id0;
-  xtensa_elf_greg_t xchal_config_id1;
-  xtensa_elf_greg_t cpux;
-  xtensa_elf_greg_t cpuy;
   xtensa_elf_greg_t pc;
   xtensa_elf_greg_t ps;
-  xtensa_elf_greg_t exccause;
-  xtensa_elf_greg_t excvaddr;
-  xtensa_elf_greg_t windowbase;
-  xtensa_elf_greg_t windowstart;
   xtensa_elf_greg_t lbeg;
   xtensa_elf_greg_t lend;
   xtensa_elf_greg_t lcount;
   xtensa_elf_greg_t sar;
-  xtensa_elf_greg_t syscall;
-  xtensa_elf_greg_t ar[0];	/* variable size (per config).  */
+  xtensa_elf_greg_t windowstart;
+  xtensa_elf_greg_t windowbase;
+  xtensa_elf_greg_t reserved[8+48];
+  xtensa_elf_greg_t ar[64];
 } xtensa_elf_gregset_t;
 
+#define XTENSA_ELF_NGREG (sizeof (xtensa_elf_gregset_t) \
+			  / sizeof (xtensa_elf_greg_t))
 
 /*  Mask.  */
 
@@ -138,19 +135,24 @@ typedef struct
   unsigned int target_number;	/* Register target number.  */
 
   int flags;			/* Flags.  */
+  int coprocessor;		/* Coprocessor num, -1 for non-CP, else -2.  */
 
   const xtensa_mask_t *mask;	/* Register is a compilation of other regs.  */
   const char *fetch;		/* Instruction sequence to fetch register.  */
   const char *store;		/* Instruction sequence to store register.  */
 } xtensa_register_t;
 
+/*  For xtensa-config.c to expand to the structure above.  */
+#define XTREG(index,ofs,bsz,sz,al,tnum,flg,cp,ty,gr,name,fet,sto,mas,ct,x,y) \
+	{#name, ofs, ty, ((gr)|((xtRegisterGroupNCP>>2)<<(cp+2))), \
+	 ct, bsz, sz, al, tnum, flg, cp, mas, fet, sto},
+#define XTREG_END {0, 0, 0, 0, 0, 0, 0, 0, -1, 0, 0, 0, 0, 0},
 
-#define XTENSA_REGISTER_FLAGS_PRIVILEDGED	0x0001
+#define XTENSA_REGISTER_FLAGS_PRIVILEGED	0x0001
 #define XTENSA_REGISTER_FLAGS_READABLE		0x0002
 #define XTENSA_REGISTER_FLAGS_WRITABLE		0x0004
 #define XTENSA_REGISTER_FLAGS_VOLATILE		0x0008
 
-
 /*  Call-ABI for stack frame.  */
 
 typedef enum 
@@ -194,7 +196,8 @@ struct gdbarch_tdep
 
   xtensa_register_t* regmap;
 
-  unsigned int num_regs;	/* Number of registers in regmap.  */
+  unsigned int num_regs;	/* Number of registers in register map.  */
+  unsigned int num_nopriv_regs;	/* Number of non-privileged registers.  */
   unsigned int num_pseudo_regs;	/* Number of pseudo registers.  */
   unsigned int num_aregs;	/* Size of register file.  */
   unsigned int num_contexts;
@@ -225,7 +228,65 @@ struct gdbarch_tdep
   unsigned long *gregmap;
 };
 
-
+/* Macro to instantiate a gdbarch_tdep structure.  */
+
+#define XTENSA_GDBARCH_TDEP_INSTANTIATE(rmap,spillsz)		\
+	{							\
+	  .target_flags = 0,					\
+	  .spill_location = -1,					\
+	  .spill_size = (spillsz),				\
+	  .unused = 0,						\
+	  .call_abi = 0,					\
+	  .debug_interrupt_level = XCHAL_DEBUGLEVEL,		\
+	  .icache_line_bytes = XCHAL_ICACHE_LINESIZE,		\
+	  .dcache_line_bytes = XCHAL_DCACHE_LINESIZE,		\
+	  .dcache_writeback = XCHAL_DCACHE_IS_WRITEBACK,	\
+	  .isa_use_windowed_registers = (XSHAL_ABI != XTHAL_ABI_CALL0),	\
+	  .isa_use_density_instructions = XCHAL_HAVE_DENSITY,	\
+	  .isa_use_exceptions = XCHAL_HAVE_EXCEPTIONS,		\
+	  .isa_use_ext_l32r = XSHAL_USE_ABSOLUTE_LITERALS,	\
+	  .isa_max_insn_size = XCHAL_MAX_INSTRUCTION_SIZE,	\
+	  .debug_num_ibreaks = XCHAL_NUM_IBREAK,		\
+	  .debug_num_dbreaks = XCHAL_NUM_DBREAK,		\
+	  .regmap = rmap,			\
+	  .num_regs = 0,			\
+	  .num_nopriv_regs = 0,			\
+	  .num_pseudo_regs = 0,			\
+	  .num_aregs = XCHAL_NUM_AREGS,		\
+	  .num_contexts = XCHAL_NUM_CONTEXTS,	\
+	  .ar_base = -1,			\
+	  .a0_base = -1,			\
+	  .wb_regnum = -1,			\
+	  .ws_regnum = -1,			\
+	  .pc_regnum = -1,			\
+	  .ps_regnum = -1,			\
+	  .lbeg_regnum = -1,			\
+	  .lend_regnum = -1,			\
+	  .lcount_regnum = -1,			\
+	  .sar_regnum = -1,			\
+	  .litbase_regnum = -1,			\
+	  .interrupt_regnum = -1,		\
+	  .interrupt2_regnum = -1,		\
+	  .cpenable_regnum = -1,		\
+	  .debugcause_regnum = -1,		\
+	  .exccause_regnum = -1,		\
+	  .excvaddr_regnum = -1,		\
+	  .max_register_raw_size = 0,		\
+	  .max_register_virtual_size = 0,	\
+	  .fp_layout = 0,			\
+	  .fp_layout_bytes = 0,			\
+	  .gregmap = 0,				\
+	}
+#define XTENSA_CONFIG_INSTANTIATE(rmap,spill_size)	\
+	struct gdbarch_tdep xtensa_tdep = \
+	  XTENSA_GDBARCH_TDEP_INSTANTIATE(rmap,spill_size);
+
+#ifndef XCHAL_NUM_CONTEXTS
+#define XCHAL_NUM_CONTEXTS	0
+#endif
+#ifndef XCHAL_HAVE_EXCEPTIONS
+#define XCHAL_HAVE_EXCEPTIONS	1
+#endif
 #define WB_SHIFT	  2
 
 /* We assign fixed numbers to the registers of the "current" window