/* Intel 387 floating point stuff.
- Copyright (C) 1988, 1989, 1991, 1992, 1993, 1994, 1998, 1999, 2000, 2001,
- 2002, 2003, 2004, 2005, 2007, 2008, 2009, 2010
- Free Software Foundation, Inc.
+ Copyright (C) 1988-1989, 1991-1994, 1998-2005, 2007-2012 Free
+ Software Foundation, Inc.
This file is part of GDB.
fputs_filtered (" Unsupported", file);
}
-/* Print the status word STATUS. */
+/* Print the status word STATUS. If STATUS_P is false, then STATUS
+ was unavailable. */
static void
-print_i387_status_word (unsigned int status, struct ui_file *file)
+print_i387_status_word (int status_p,
+ unsigned int status, struct ui_file *file)
{
- fprintf_filtered (file, "Status Word: %s",
- hex_string_custom (status, 4));
+ fprintf_filtered (file, "Status Word: ");
+ if (!status_p)
+ {
+ fprintf_filtered (file, "%s\n", _("<unavailable>"));
+ return;
+ }
+
+ fprintf_filtered (file, "%s", hex_string_custom (status, 4));
fputs_filtered (" ", file);
fprintf_filtered (file, " %s", (status & 0x0001) ? "IE" : " ");
fprintf_filtered (file, " %s", (status & 0x0002) ? "DE" : " ");
" TOP: %d\n", ((status >> 11) & 7));
}
-/* Print the control word CONTROL. */
+/* Print the control word CONTROL. If CONTROL_P is false, then
+ CONTROL was unavailable. */
static void
-print_i387_control_word (unsigned int control, struct ui_file *file)
+print_i387_control_word (int control_p,
+ unsigned int control, struct ui_file *file)
{
- fprintf_filtered (file, "Control Word: %s",
- hex_string_custom (control, 4));
+ fprintf_filtered (file, "Control Word: ");
+ if (!control_p)
+ {
+ fprintf_filtered (file, "%s\n", _("<unavailable>"));
+ return;
+ }
+
+ fprintf_filtered (file, "%s", hex_string_custom (control, 4));
fputs_filtered (" ", file);
fprintf_filtered (file, " %s", (control & 0x0001) ? "IM" : " ");
fprintf_filtered (file, " %s", (control & 0x0002) ? "DM" : " ");
struct frame_info *frame, const char *args)
{
struct gdbarch_tdep *tdep = gdbarch_tdep (get_frame_arch (frame));
- gdb_byte buf[4];
ULONGEST fctrl;
+ int fctrl_p;
ULONGEST fstat;
+ int fstat_p;
ULONGEST ftag;
+ int ftag_p;
ULONGEST fiseg;
+ int fiseg_p;
ULONGEST fioff;
+ int fioff_p;
ULONGEST foseg;
+ int foseg_p;
ULONGEST fooff;
+ int fooff_p;
ULONGEST fop;
+ int fop_p;
int fpreg;
int top;
gdb_assert (gdbarch == get_frame_arch (frame));
- fctrl = get_frame_register_unsigned (frame, I387_FCTRL_REGNUM (tdep));
- fstat = get_frame_register_unsigned (frame, I387_FSTAT_REGNUM (tdep));
- ftag = get_frame_register_unsigned (frame, I387_FTAG_REGNUM (tdep));
- fiseg = get_frame_register_unsigned (frame, I387_FISEG_REGNUM (tdep));
- fioff = get_frame_register_unsigned (frame, I387_FIOFF_REGNUM (tdep));
- foseg = get_frame_register_unsigned (frame, I387_FOSEG_REGNUM (tdep));
- fooff = get_frame_register_unsigned (frame, I387_FOOFF_REGNUM (tdep));
- fop = get_frame_register_unsigned (frame, I387_FOP_REGNUM (tdep));
+ fctrl_p = read_frame_register_unsigned (frame,
+ I387_FCTRL_REGNUM (tdep), &fctrl);
+ fstat_p = read_frame_register_unsigned (frame,
+ I387_FSTAT_REGNUM (tdep), &fstat);
+ ftag_p = read_frame_register_unsigned (frame,
+ I387_FTAG_REGNUM (tdep), &ftag);
+ fiseg_p = read_frame_register_unsigned (frame,
+ I387_FISEG_REGNUM (tdep), &fiseg);
+ fioff_p = read_frame_register_unsigned (frame,
+ I387_FIOFF_REGNUM (tdep), &fioff);
+ foseg_p = read_frame_register_unsigned (frame,
+ I387_FOSEG_REGNUM (tdep), &foseg);
+ fooff_p = read_frame_register_unsigned (frame,
+ I387_FOOFF_REGNUM (tdep), &fooff);
+ fop_p = read_frame_register_unsigned (frame,
+ I387_FOP_REGNUM (tdep), &fop);
+
+ if (fstat_p)
+ {
+ top = ((fstat >> 11) & 7);
+
+ for (fpreg = 7; fpreg >= 0; fpreg--)
+ {
+ struct value *regval;
+ int regnum;
+ int i;
+ int tag = -1;
- top = ((fstat >> 11) & 7);
+ fprintf_filtered (file, "%sR%d: ", fpreg == top ? "=>" : " ", fpreg);
- for (fpreg = 7; fpreg >= 0; fpreg--)
- {
- gdb_byte raw[I386_MAX_REGISTER_SIZE];
- int tag = (ftag >> (fpreg * 2)) & 3;
- int i;
+ if (ftag_p)
+ {
+ tag = (ftag >> (fpreg * 2)) & 3;
- fprintf_filtered (file, "%sR%d: ", fpreg == top ? "=>" : " ", fpreg);
+ switch (tag)
+ {
+ case 0:
+ fputs_filtered ("Valid ", file);
+ break;
+ case 1:
+ fputs_filtered ("Zero ", file);
+ break;
+ case 2:
+ fputs_filtered ("Special ", file);
+ break;
+ case 3:
+ fputs_filtered ("Empty ", file);
+ break;
+ }
+ }
+ else
+ fputs_filtered ("Unknown ", file);
- switch (tag)
- {
- case 0:
- fputs_filtered ("Valid ", file);
- break;
- case 1:
- fputs_filtered ("Zero ", file);
- break;
- case 2:
- fputs_filtered ("Special ", file);
- break;
- case 3:
- fputs_filtered ("Empty ", file);
- break;
- }
+ regnum = (fpreg + 8 - top) % 8 + I387_ST0_REGNUM (tdep);
+ regval = get_frame_register_value (frame, regnum);
- get_frame_register (frame, (fpreg + 8 - top) % 8 + I387_ST0_REGNUM (tdep),
- raw);
+ if (value_entirely_available (regval))
+ {
+ const char *raw = value_contents (regval);
- fputs_filtered ("0x", file);
- for (i = 9; i >= 0; i--)
- fprintf_filtered (file, "%02x", raw[i]);
+ fputs_filtered ("0x", file);
+ for (i = 9; i >= 0; i--)
+ fprintf_filtered (file, "%02x", raw[i]);
- if (tag != 3)
- print_i387_ext (gdbarch, raw, file);
+ if (tag != -1 && tag != 3)
+ print_i387_ext (gdbarch, raw, file);
+ }
+ else
+ fprintf_filtered (file, "%s", _("<unavailable>"));
- fputs_filtered ("\n", file);
+ fputs_filtered ("\n", file);
+ }
}
fputs_filtered ("\n", file);
-
- print_i387_status_word (fstat, file);
- print_i387_control_word (fctrl, file);
+ print_i387_status_word (fstat_p, fstat, file);
+ print_i387_control_word (fctrl_p, fctrl, file);
fprintf_filtered (file, "Tag Word: %s\n",
- hex_string_custom (ftag, 4));
+ ftag_p ? hex_string_custom (ftag, 4) : _("<unavailable>"));
fprintf_filtered (file, "Instruction Pointer: %s:",
- hex_string_custom (fiseg, 2));
- fprintf_filtered (file, "%s\n", hex_string_custom (fioff, 8));
+ fiseg_p ? hex_string_custom (fiseg, 2) : _("<unavailable>"));
+ fprintf_filtered (file, "%s\n",
+ fioff_p ? hex_string_custom (fioff, 8) : _("<unavailable>"));
fprintf_filtered (file, "Operand Pointer: %s:",
- hex_string_custom (foseg, 2));
- fprintf_filtered (file, "%s\n", hex_string_custom (fooff, 8));
+ foseg_p ? hex_string_custom (foseg, 2) : _("<unavailable>"));
+ fprintf_filtered (file, "%s\n",
+ fooff_p ? hex_string_custom (fooff, 8) : _("<unavailable>"));
fprintf_filtered (file, "Opcode: %s\n",
- hex_string_custom (fop ? (fop | 0xd800) : 0, 4));
+ fop_p
+ ? (hex_string_custom (fop ? (fop | 0xd800) : 0, 4))
+ : _("<unavailable>"));
}
\f
needs any special handling. */
int
-i387_convert_register_p (struct gdbarch *gdbarch, int regnum, struct type *type)
+i387_convert_register_p (struct gdbarch *gdbarch, int regnum,
+ struct type *type)
{
if (i386_fp_regnum_p (gdbarch, regnum))
{
/* Read a value of type TYPE from register REGNUM in frame FRAME, and
return its contents in TO. */
-void
+int
i387_register_to_value (struct frame_info *frame, int regnum,
- struct type *type, gdb_byte *to)
+ struct type *type, gdb_byte *to,
+ int *optimizedp, int *unavailablep)
{
struct gdbarch *gdbarch = get_frame_arch (frame);
gdb_byte from[I386_MAX_REGISTER_SIZE];
{
warning (_("Cannot convert floating-point register value "
"to non-floating-point type."));
- return;
+ *optimizedp = *unavailablep = 0;
+ return 0;
}
/* Convert to TYPE. */
- get_frame_register (frame, regnum, from);
+ if (!get_frame_register_bytes (frame, regnum, 0, TYPE_LENGTH (type),
+ from, optimizedp, unavailablep))
+ return 0;
+
convert_typed_floating (from, i387_ext_type (gdbarch), to, type);
+ *optimizedp = *unavailablep = 0;
+ return 1;
}
/* Write the contents FROM of a value of type TYPE into register
if (val[0] & (1 << fpreg))
{
- int regnum = (fpreg + 8 - top) % 8
- + I387_ST0_REGNUM (tdep);
- tag = i387_tag (FXSAVE_ADDR (tdep, regs, regnum));
+ int thisreg = (fpreg + 8 - top) % 8
+ + I387_ST0_REGNUM (tdep);
+ tag = i387_tag (FXSAVE_ADDR (tdep, regs, thisreg));
}
else
tag = 3; /* Empty */
const gdb_byte *regs = xsave;
int i;
unsigned int clear_bv;
- const gdb_byte *p;
+ static const gdb_byte zero[MAX_REGISTER_SIZE] = { 0 };
enum
{
none = 0x0,
all = x87 | sse | avxh
} regclass;
+ gdb_assert (regs != NULL);
gdb_assert (tdep->st0_regnum >= I386_ST0_REGNUM);
gdb_assert (tdep->num_xmm_regs > 0);
else
regclass = none;
- if (regs != NULL && regclass != none)
+ if (regclass != none)
{
/* Get `xstat_bv'. */
const gdb_byte *xstate_bv_p = XSAVE_XSTATE_BV_ADDR (regs);
else
clear_bv = I386_XSTATE_AVX_MASK;
+ /* With the delayed xsave mechanism, in between the program
+ starting, and the program accessing the vector registers for the
+ first time, the register's values are invalid. The kernel
+ initializes register states to zero when they are set the first
+ time in a program. This means that from the user-space programs'
+ perspective, it's the same as if the registers have always been
+ zero from the start of the program. Therefore, the debugger
+ should provide the same illusion to the user. */
+
switch (regclass)
{
case none:
case avxh:
if ((clear_bv & I386_XSTATE_AVX))
- p = NULL;
+ regcache_raw_supply (regcache, regnum, zero);
else
- p = XSAVE_AVXH_ADDR (tdep, regs, regnum);
- regcache_raw_supply (regcache, regnum, p);
+ regcache_raw_supply (regcache, regnum,
+ XSAVE_AVXH_ADDR (tdep, regs, regnum));
return;
case sse:
if ((clear_bv & I386_XSTATE_SSE))
- p = NULL;
+ regcache_raw_supply (regcache, regnum, zero);
else
- p = FXSAVE_ADDR (tdep, regs, regnum);
- regcache_raw_supply (regcache, regnum, p);
+ regcache_raw_supply (regcache, regnum,
+ FXSAVE_ADDR (tdep, regs, regnum));
return;
case x87:
if ((clear_bv & I386_XSTATE_X87))
- p = NULL;
+ regcache_raw_supply (regcache, regnum, zero);
else
- p = FXSAVE_ADDR (tdep, regs, regnum);
- regcache_raw_supply (regcache, regnum, p);
+ regcache_raw_supply (regcache, regnum,
+ FXSAVE_ADDR (tdep, regs, regnum));
return;
case all:
- /* Hanle the upper YMM registers. */
+ /* Handle the upper YMM registers. */
if ((tdep->xcr0 & I386_XSTATE_AVX))
{
if ((clear_bv & I386_XSTATE_AVX))
- p = NULL;
+ {
+ for (i = I387_YMM0H_REGNUM (tdep);
+ i < I387_YMMENDH_REGNUM (tdep);
+ i++)
+ regcache_raw_supply (regcache, i, zero);
+ }
else
- p = regs;
-
- for (i = I387_YMM0H_REGNUM (tdep);
- i < I387_YMMENDH_REGNUM (tdep); i++)
{
- if (p != NULL)
- p = XSAVE_AVXH_ADDR (tdep, regs, i);
- regcache_raw_supply (regcache, i, p);
+ for (i = I387_YMM0H_REGNUM (tdep);
+ i < I387_YMMENDH_REGNUM (tdep);
+ i++)
+ regcache_raw_supply (regcache, i,
+ XSAVE_AVXH_ADDR (tdep, regs, i));
}
}
if ((tdep->xcr0 & I386_XSTATE_SSE))
{
if ((clear_bv & I386_XSTATE_SSE))
- p = NULL;
+ {
+ for (i = I387_XMM0_REGNUM (tdep);
+ i < I387_MXCSR_REGNUM (tdep);
+ i++)
+ regcache_raw_supply (regcache, i, zero);
+ }
else
- p = regs;
-
- for (i = I387_XMM0_REGNUM (tdep);
- i < I387_MXCSR_REGNUM (tdep); i++)
{
- if (p != NULL)
- p = FXSAVE_ADDR (tdep, regs, i);
- regcache_raw_supply (regcache, i, p);
+ for (i = I387_XMM0_REGNUM (tdep);
+ i < I387_MXCSR_REGNUM (tdep); i++)
+ regcache_raw_supply (regcache, i,
+ FXSAVE_ADDR (tdep, regs, i));
}
}
if ((tdep->xcr0 & I386_XSTATE_X87))
{
if ((clear_bv & I386_XSTATE_X87))
- p = NULL;
+ {
+ for (i = I387_ST0_REGNUM (tdep);
+ i < I387_FCTRL_REGNUM (tdep);
+ i++)
+ regcache_raw_supply (regcache, i, zero);
+ }
else
- p = regs;
-
- for (i = I387_ST0_REGNUM (tdep);
- i < I387_FCTRL_REGNUM (tdep); i++)
{
- if (p != NULL)
- p = FXSAVE_ADDR (tdep, regs, i);
- regcache_raw_supply (regcache, i, p);
+ for (i = I387_ST0_REGNUM (tdep);
+ i < I387_FCTRL_REGNUM (tdep);
+ i++)
+ regcache_raw_supply (regcache, i, FXSAVE_ADDR (tdep, regs, i));
}
}
break;
for (i = I387_FCTRL_REGNUM (tdep); i < I387_XMM0_REGNUM (tdep); i++)
if (regnum == -1 || regnum == i)
{
- if (regs == NULL)
- {
- regcache_raw_supply (regcache, i, NULL);
- continue;
- }
-
/* Most of the FPU control registers occupy only 16 bits in
the xsave extended state. Give those a special treatment. */
if (i != I387_FIOFF_REGNUM (tdep)
if (val[0] & (1 << fpreg))
{
- int regnum = (fpreg + 8 - top) % 8
+ int thisreg = (fpreg + 8 - top) % 8
+ I387_ST0_REGNUM (tdep);
- tag = i387_tag (FXSAVE_ADDR (tdep, regs, regnum));
+ tag = i387_tag (FXSAVE_ADDR (tdep, regs, thisreg));
}
else
tag = 3; /* Empty */
}
if (regnum == I387_MXCSR_REGNUM (tdep) || regnum == -1)
- {
- p = regs == NULL ? NULL : FXSAVE_MXCSR_ADDR (regs);
- regcache_raw_supply (regcache, I387_MXCSR_REGNUM (tdep), p);
- }
+ regcache_raw_supply (regcache, I387_MXCSR_REGNUM (tdep),
+ FXSAVE_MXCSR_ADDR (regs));
}
/* Similar to i387_collect_fxsave, but use XSAVE extended state. */
gdb_byte raw[I386_MAX_REGISTER_SIZE];
gdb_byte *xstate_bv_p = XSAVE_XSTATE_BV_ADDR (regs);
unsigned int xstate_bv = 0;
- /* The supported bits in `xstat_bv' are 1 byte. */
+ /* The supported bits in `xstat_bv' are 1 byte. */
unsigned int clear_bv = (~(*xstate_bv_p)) & tdep->xcr0;
gdb_byte *p;
projects / deliverable / binutils-gdb.git / blobdiff