gdb/x86: Implement ax_pseudo_register_collect hook.

Makes "collect $ymm15" action work.

gdb/ChangeLog:

	* amd64-tdep.c (amd64_ax_pseudo_register_collect): New function.
	(amd64_init_abi): Fill ax_pseudo_register_collect hook.
	* gdb/i386-tdep.c (i386_pseudo_register_read_into_value): Remove
	misleading comment.
	(i386_pseudo_register_write): Ditto.
	(i386_ax_pseudo_register_collect): New function.
	(i386_gdbarch_init): Fill ax_pseudo_register_collect hook.
	* i386-tdep.h: Add i386_ax_pseudo_register_collect prototype.

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index b32a301dd9e10e6069374fc7177879f989bd286e..05d6cd07529be27e64ba4426805325b8e2b40ee7 100644 (file)
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,14 @@
+2016-02-10  Marcin Kościelnicki  <koriakin@0x04.net>
+
+       * amd64-tdep.c (amd64_ax_pseudo_register_collect): New function.
+       (amd64_init_abi): Fill ax_pseudo_register_collect hook.
+       * gdb/i386-tdep.c (i386_pseudo_register_read_into_value): Remove
+       misleading comment.
+       (i386_pseudo_register_write): Ditto.
+       (i386_ax_pseudo_register_collect): New function.
+       (i386_gdbarch_init): Fill ax_pseudo_register_collect hook.
+       * i386-tdep.h: Add i386_ax_pseudo_register_collect prototype.
+
 2016-02-10  Marcin Kościelnicki  <koriakin@0x04.net>
 
        * tracefile-tfile.c (tfile_fetch_registers): Use g packet order

diff --git a/gdb/amd64-tdep.c b/gdb/amd64-tdep.c
index fae92b267a655ddaace6c8342757443bbcf37d85..a62efde5e4a06cc1e7e32277e86055a14b0d34c5 100644 (file)
--- a/gdb/amd64-tdep.c
+++ b/gdb/amd64-tdep.c
@@ -455,6 +455,35 @@ amd64_pseudo_register_write (struct gdbarch *gdbarch,
     i386_pseudo_register_write (gdbarch, regcache, regnum, buf);
 }
 
+/* Implement the 'ax_pseudo_register_collect' gdbarch method.  */
+
+static int
+amd64_ax_pseudo_register_collect (struct gdbarch *gdbarch,
+                                 struct agent_expr *ax, int regnum)
+{
+  struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+
+  if (i386_byte_regnum_p (gdbarch, regnum))
+    {
+      int gpnum = regnum - tdep->al_regnum;
+
+      if (gpnum >= AMD64_NUM_LOWER_BYTE_REGS)
+       ax_reg_mask (ax, gpnum - AMD64_NUM_LOWER_BYTE_REGS);
+      else
+       ax_reg_mask (ax, gpnum);
+      return 0;
+    }
+  else if (i386_dword_regnum_p (gdbarch, regnum))
+    {
+      int gpnum = regnum - tdep->eax_regnum;
+
+      ax_reg_mask (ax, gpnum);
+      return 0;
+    }
+  else
+    return i386_ax_pseudo_register_collect (gdbarch, ax, regnum);
+}
+
 \f
 
 /* Register classes as defined in the psABI.  */
@@ -2997,6 +3026,8 @@ amd64_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
                                          amd64_pseudo_register_read_value);
   set_gdbarch_pseudo_register_write (gdbarch,
                                     amd64_pseudo_register_write);
+  set_gdbarch_ax_pseudo_register_collect (gdbarch,
+                                         amd64_ax_pseudo_register_collect);
 
   set_tdesc_pseudo_register_name (gdbarch, amd64_pseudo_register_name);
 

diff --git a/gdb/i386-tdep.c b/gdb/i386-tdep.c
index b706463cec99b51557c212f12636db46ce1a00fd..db4cd0adb8b132737bf72699ad3e1b99126894e0 100644 (file)
--- a/gdb/i386-tdep.c
+++ b/gdb/i386-tdep.c
@@ -3419,9 +3419,6 @@ i386_pseudo_register_read_into_value (struct gdbarch *gdbarch,
        }
       else if (i386_byte_regnum_p (gdbarch, regnum))
        {
-         /* Check byte pseudo registers last since this function will
-            be called from amd64_pseudo_register_read, which handles
-            byte pseudo registers differently.  */
          int gpnum = regnum - tdep->al_regnum;
 
          /* Extract (always little endian).  We read both lower and
@@ -3584,9 +3581,6 @@ i386_pseudo_register_write (struct gdbarch *gdbarch, struct regcache *regcache,
        }
       else if (i386_byte_regnum_p (gdbarch, regnum))
        {
-         /* Check byte pseudo registers last since this function will
-            be called from amd64_pseudo_register_read, which handles
-            byte pseudo registers differently.  */
          int gpnum = regnum - tdep->al_regnum;
 
          /* Read ...  We read both lower and upper registers.  */
@@ -3603,6 +3597,88 @@ i386_pseudo_register_write (struct gdbarch *gdbarch, struct regcache *regcache,
        internal_error (__FILE__, __LINE__, _("invalid regnum"));
     }
 }
+
+/* Implement the 'ax_pseudo_register_collect' gdbarch method.  */
+
+int
+i386_ax_pseudo_register_collect (struct gdbarch *gdbarch,
+                                struct agent_expr *ax, int regnum)
+{
+  struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+
+  if (i386_mmx_regnum_p (gdbarch, regnum))
+    {
+      /* MMX to FPU register mapping depends on current TOS.  Let's just
+        not care and collect everything...  */
+      int i;
+
+      ax_reg_mask (ax, I387_FSTAT_REGNUM (tdep));
+      for (i = 0; i < 8; i++)
+       ax_reg_mask (ax, I387_ST0_REGNUM (tdep) + i);
+      return 0;
+    }
+  else if (i386_bnd_regnum_p (gdbarch, regnum))
+    {
+      regnum -= tdep->bnd0_regnum;
+      ax_reg_mask (ax, I387_BND0R_REGNUM (tdep) + regnum);
+      return 0;
+    }
+  else if (i386_k_regnum_p (gdbarch, regnum))
+    {
+      regnum -= tdep->k0_regnum;
+      ax_reg_mask (ax, tdep->k0_regnum + regnum);
+      return 0;
+    }
+  else if (i386_zmm_regnum_p (gdbarch, regnum))
+    {
+      regnum -= tdep->zmm0_regnum;
+      if (regnum < num_lower_zmm_regs)
+       {
+         ax_reg_mask (ax, I387_XMM0_REGNUM (tdep) + regnum);
+         ax_reg_mask (ax, tdep->ymm0h_regnum + regnum);
+       }
+      else
+       {
+         ax_reg_mask (ax, I387_XMM16_REGNUM (tdep) + regnum
+                          - num_lower_zmm_regs);
+         ax_reg_mask (ax, I387_YMM16H_REGNUM (tdep) + regnum
+                          - num_lower_zmm_regs);
+       }
+      ax_reg_mask (ax, tdep->zmm0h_regnum + regnum);
+      return 0;
+    }
+  else if (i386_ymm_regnum_p (gdbarch, regnum))
+    {
+      regnum -= tdep->ymm0_regnum;
+      ax_reg_mask (ax, I387_XMM0_REGNUM (tdep) + regnum);
+      ax_reg_mask (ax, tdep->ymm0h_regnum + regnum);
+      return 0;
+    }
+  else if (i386_ymm_avx512_regnum_p (gdbarch, regnum))
+    {
+      regnum -= tdep->ymm16_regnum;
+      ax_reg_mask (ax, I387_XMM16_REGNUM (tdep) + regnum);
+      ax_reg_mask (ax, tdep->ymm16h_regnum + regnum);
+      return 0;
+    }
+  else if (i386_word_regnum_p (gdbarch, regnum))
+    {
+      int gpnum = regnum - tdep->ax_regnum;
+
+      ax_reg_mask (ax, gpnum);
+      return 0;
+    }
+  else if (i386_byte_regnum_p (gdbarch, regnum))
+    {
+      int gpnum = regnum - tdep->al_regnum;
+
+      ax_reg_mask (ax, gpnum % 4);
+      return 0;
+    }
+  else
+    internal_error (__FILE__, __LINE__, _("invalid regnum"));
+  return 1;
+}
 \f
 
 /* Return the register number of the register allocated by GCC after
@@ -8423,6 +8499,8 @@ i386_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
   set_gdbarch_pseudo_register_read_value (gdbarch,
                                          i386_pseudo_register_read_value);
   set_gdbarch_pseudo_register_write (gdbarch, i386_pseudo_register_write);
+  set_gdbarch_ax_pseudo_register_collect (gdbarch,
+                                         i386_ax_pseudo_register_collect);
 
   set_tdesc_pseudo_register_type (gdbarch, i386_pseudo_register_type);
   set_tdesc_pseudo_register_name (gdbarch, i386_pseudo_register_name);

diff --git a/gdb/i386-tdep.h b/gdb/i386-tdep.h
index 10d2772141fe62608941755628ea5f59c1e390c2..770f59d55a1516d20f8a13d3f04208b44f81cf32 100644 (file)
--- a/gdb/i386-tdep.h
+++ b/gdb/i386-tdep.h
@@ -360,6 +360,10 @@ extern void i386_pseudo_register_write (struct gdbarch *gdbarch,
                                        struct regcache *regcache,
                                        int regnum, const gdb_byte *buf);
 
+extern int i386_ax_pseudo_register_collect (struct gdbarch *gdbarch,
+                                           struct agent_expr *ax,
+                                           int regnum);
+
 /* Segment selectors.  */
 #define I386_SEL_RPL   0x0003  /* Requester's Privilege Level mask.  */
 #define I386_SEL_UPL   0x0003  /* User Privilige Level.  */