/* i387-specific utility functions, for the remote server for GDB.
- Copyright (C) 2000-2016 Free Software Foundation, Inc.
+ Copyright (C) 2000-2020 Free Software Foundation, Inc.
This file is part of GDB.
#include "server.h"
#include "i387-fp.h"
-#include "x86-xstate.h"
+#include "gdbsupport/x86-xstate.h"
static const int num_mpx_bnd_registers = 4;
static const int num_mpx_cfg_registers = 2;
static const int num_avx512_zmmh_high_registers = 16;
static const int num_avx512_ymmh_registers = 16;
static const int num_avx512_xmm_registers = 16;
+static const int num_pkeys_registers = 1;
/* Note: These functions preserve the reserved bits in control registers.
However, gdbserver promptly throws away that information. */
/* Space for 16 512-bit zmm16-31 values. */
unsigned char zmmh_high_space[1024];
+
+ /* Space for 1 32-bit PKRU register. The HW XSTATE size for this feature is
+ actually 64 bits, but WRPKRU/RDPKRU instructions ignore upper 32 bits. */
+ unsigned char pkru_space[8];
};
void
struct i387_fsave *fp = (struct i387_fsave *) buf;
int i;
int st0_regnum = find_regno (regcache->tdesc, "st0");
- unsigned long val, val2;
+ unsigned long val2;
for (i = 0; i < 8; i++)
collect_register (regcache, i + st0_regnum,
((char *) &fp->st_space[0]) + i * 10);
- collect_register_by_name (regcache, "fioff", &fp->fioff);
- collect_register_by_name (regcache, "fooff", &fp->fooff);
-
+ fp->fioff = regcache_raw_get_unsigned_by_name (regcache, "fioff");
+ fp->fooff = regcache_raw_get_unsigned_by_name (regcache, "fooff");
+
/* This one's 11 bits... */
- collect_register_by_name (regcache, "fop", &val2);
+ val2 = regcache_raw_get_unsigned_by_name (regcache, "fop");
fp->fop = (val2 & 0x7FF) | (fp->fop & 0xF800);
/* Some registers are 16-bit. */
- collect_register_by_name (regcache, "fctrl", &val);
- fp->fctrl = val;
-
- collect_register_by_name (regcache, "fstat", &val);
- val &= 0xFFFF;
- fp->fstat = val;
-
- collect_register_by_name (regcache, "ftag", &val);
- val &= 0xFFFF;
- fp->ftag = val;
-
- collect_register_by_name (regcache, "fiseg", &val);
- val &= 0xFFFF;
- fp->fiseg = val;
-
- collect_register_by_name (regcache, "foseg", &val);
- val &= 0xFFFF;
- fp->foseg = val;
+ fp->fctrl = regcache_raw_get_unsigned_by_name (regcache, "fctrl");
+ fp->fstat = regcache_raw_get_unsigned_by_name (regcache, "fstat");
+ fp->ftag = regcache_raw_get_unsigned_by_name (regcache, "ftag");
+ fp->fiseg = regcache_raw_get_unsigned_by_name (regcache, "fiseg");
+ fp->foseg = regcache_raw_get_unsigned_by_name (regcache, "foseg");
}
void
collect_register (regcache, i + xmm0_regnum,
((char *) &fp->xmm_space[0]) + i * 16);
- collect_register_by_name (regcache, "fioff", &fp->fioff);
- collect_register_by_name (regcache, "fooff", &fp->fooff);
- collect_register_by_name (regcache, "mxcsr", &fp->mxcsr);
+ fp->fioff = regcache_raw_get_unsigned_by_name (regcache, "fioff");
+ fp->fooff = regcache_raw_get_unsigned_by_name (regcache, "fooff");
+ fp->mxcsr = regcache_raw_get_unsigned_by_name (regcache, "mxcsr");
/* This one's 11 bits... */
- collect_register_by_name (regcache, "fop", &val2);
+ val2 = regcache_raw_get_unsigned_by_name (regcache, "fop");
fp->fop = (val2 & 0x7FF) | (fp->fop & 0xF800);
/* Some registers are 16-bit. */
- collect_register_by_name (regcache, "fctrl", &val);
- fp->fctrl = val;
-
- collect_register_by_name (regcache, "fstat", &val);
- fp->fstat = val;
+ fp->fctrl = regcache_raw_get_unsigned_by_name (regcache, "fctrl");
+ fp->fstat = regcache_raw_get_unsigned_by_name (regcache, "fstat");
/* Convert to the simplifed tag form stored in fxsave data. */
- collect_register_by_name (regcache, "ftag", &val);
- val &= 0xFFFF;
+ val = regcache_raw_get_unsigned_by_name (regcache, "ftag");
val2 = 0;
for (i = 7; i >= 0; i--)
{
}
fp->ftag = val2;
- collect_register_by_name (regcache, "fiseg", &val);
- fp->fiseg = val;
-
- collect_register_by_name (regcache, "foseg", &val);
- fp->foseg = val;
+ fp->fiseg = regcache_raw_get_unsigned_by_name (regcache, "fiseg");
+ fp->foseg = regcache_raw_get_unsigned_by_name (regcache, "foseg");
}
void
struct i387_xsave *fp = (struct i387_xsave *) buf;
int i;
unsigned long val, val2;
- unsigned int clear_bv;
unsigned long long xstate_bv = 0;
+ unsigned long long clear_bv = 0;
char raw[64];
char *p;
/* Amd64 has 16 xmm regs; I386 has 8 xmm regs. */
int num_xmm_registers = register_size (regcache->tdesc, 0) == 8 ? 16 : 8;
- /* The supported bits in `xstat_bv' are 1 byte. Clear part in
+ /* The supported bits in `xstat_bv' are 8 bytes. Clear part in
vector registers if its bit in xstat_bv is zero. */
clear_bv = (~fp->xstate_bv) & x86_xcr0;
if (clear_bv)
{
if ((clear_bv & X86_XSTATE_X87))
- for (i = 0; i < 8; i++)
- memset (((char *) &fp->st_space[0]) + i * 16, 0, 10);
+ {
+ for (i = 0; i < 8; i++)
+ memset (((char *) &fp->st_space[0]) + i * 16, 0, 10);
+
+ fp->fioff = 0;
+ fp->fooff = 0;
+ fp->fctrl = I387_FCTRL_INIT_VAL;
+ fp->fstat = 0;
+ fp->ftag = 0;
+ fp->fiseg = 0;
+ fp->foseg = 0;
+ fp->fop = 0;
+ }
if ((clear_bv & X86_XSTATE_SSE))
- for (i = 0; i < num_xmm_registers; i++)
+ for (i = 0; i < num_xmm_registers; i++)
memset (((char *) &fp->xmm_space[0]) + i * 16, 0, 16);
if ((clear_bv & X86_XSTATE_AVX))
- for (i = 0; i < num_xmm_registers; i++)
+ for (i = 0; i < num_xmm_registers; i++)
memset (((char *) &fp->ymmh_space[0]) + i * 16, 0, 16);
+ if ((clear_bv & X86_XSTATE_SSE) && (clear_bv & X86_XSTATE_AVX))
+ memset (((char *) &fp->mxcsr), 0, 4);
+
if ((clear_bv & X86_XSTATE_BNDREGS))
for (i = 0; i < num_mpx_bnd_registers; i++)
memset (((char *) &fp->mpx_bnd_space[0]) + i * 16, 0, 16);
for (i = 0; i < num_avx512_ymmh_registers; i++)
memset (((char *) &fp->zmmh_high_space[0]) + 16 + i * 64, 0, 16);
}
+
+ if ((clear_bv & X86_XSTATE_PKRU))
+ for (i = 0; i < num_pkeys_registers; i++)
+ memset (((char *) &fp->pkru_space[0]) + i * 4, 0, 4);
}
/* Check if any x87 registers are changed. */
}
}
- /* Update the corresponding bits in xstate_bv if any SSE/AVX
- registers are changed. */
- fp->xstate_bv |= xstate_bv;
+ /* Check if any PKEYS registers are changed. */
+ if ((x86_xcr0 & X86_XSTATE_PKRU))
+ {
+ int pkru_regnum = find_regno (regcache->tdesc, "pkru");
- collect_register_by_name (regcache, "fioff", &fp->fioff);
- collect_register_by_name (regcache, "fooff", &fp->fooff);
- collect_register_by_name (regcache, "mxcsr", &fp->mxcsr);
+ for (i = 0; i < num_pkeys_registers; i++)
+ {
+ collect_register (regcache, i + pkru_regnum, raw);
+ p = ((char *) &fp->pkru_space[0]) + i * 4;
+ if (memcmp (raw, p, 4) != 0)
+ {
+ xstate_bv |= X86_XSTATE_PKRU;
+ memcpy (p, raw, 4);
+ }
+ }
+ }
- /* This one's 11 bits... */
- collect_register_by_name (regcache, "fop", &val2);
- fp->fop = (val2 & 0x7FF) | (fp->fop & 0xF800);
+ if ((x86_xcr0 & X86_XSTATE_SSE) || (x86_xcr0 & X86_XSTATE_AVX))
+ {
+ collect_register_by_name (regcache, "mxcsr", raw);
+ if (memcmp (raw, &fp->mxcsr, 4) != 0)
+ {
+ if (((fp->xstate_bv | xstate_bv)
+ & (X86_XSTATE_SSE | X86_XSTATE_AVX)) == 0)
+ xstate_bv |= X86_XSTATE_SSE;
+ memcpy (&fp->mxcsr, raw, 4);
+ }
+ }
- /* Some registers are 16-bit. */
- collect_register_by_name (regcache, "fctrl", &val);
- fp->fctrl = val;
+ if (x86_xcr0 & X86_XSTATE_X87)
+ {
+ collect_register_by_name (regcache, "fioff", raw);
+ if (memcmp (raw, &fp->fioff, 4) != 0)
+ {
+ xstate_bv |= X86_XSTATE_X87;
+ memcpy (&fp->fioff, raw, 4);
+ }
- collect_register_by_name (regcache, "fstat", &val);
- fp->fstat = val;
+ collect_register_by_name (regcache, "fooff", raw);
+ if (memcmp (raw, &fp->fooff, 4) != 0)
+ {
+ xstate_bv |= X86_XSTATE_X87;
+ memcpy (&fp->fooff, raw, 4);
+ }
- /* Convert to the simplifed tag form stored in fxsave data. */
- collect_register_by_name (regcache, "ftag", &val);
- val &= 0xFFFF;
- val2 = 0;
- for (i = 7; i >= 0; i--)
- {
- int tag = (val >> (i * 2)) & 3;
+ /* This one's 11 bits... */
+ val2 = regcache_raw_get_unsigned_by_name (regcache, "fop");
+ val2 = (val2 & 0x7FF) | (fp->fop & 0xF800);
+ if (fp->fop != val2)
+ {
+ xstate_bv |= X86_XSTATE_X87;
+ fp->fop = val2;
+ }
- if (tag != 3)
- val2 |= (1 << i);
- }
- fp->ftag = val2;
+ /* Some registers are 16-bit. */
+ val = regcache_raw_get_unsigned_by_name (regcache, "fctrl");
+ if (fp->fctrl != val)
+ {
+ xstate_bv |= X86_XSTATE_X87;
+ fp->fctrl = val;
+ }
+
+ val = regcache_raw_get_unsigned_by_name (regcache, "fstat");
+ if (fp->fstat != val)
+ {
+ xstate_bv |= X86_XSTATE_X87;
+ fp->fstat = val;
+ }
+
+ /* Convert to the simplifed tag form stored in fxsave data. */
+ val = regcache_raw_get_unsigned_by_name (regcache, "ftag");
+ val2 = 0;
+ for (i = 7; i >= 0; i--)
+ {
+ int tag = (val >> (i * 2)) & 3;
+
+ if (tag != 3)
+ val2 |= (1 << i);
+ }
+ if (fp->ftag != val2)
+ {
+ xstate_bv |= X86_XSTATE_X87;
+ fp->ftag = val2;
+ }
+
+ val = regcache_raw_get_unsigned_by_name (regcache, "fiseg");
+ if (fp->fiseg != val)
+ {
+ xstate_bv |= X86_XSTATE_X87;
+ fp->fiseg = val;
+ }
- collect_register_by_name (regcache, "fiseg", &val);
- fp->fiseg = val;
+ val = regcache_raw_get_unsigned_by_name (regcache, "foseg");
+ if (fp->foseg != val)
+ {
+ xstate_bv |= X86_XSTATE_X87;
+ fp->foseg = val;
+ }
+ }
- collect_register_by_name (regcache, "foseg", &val);
- fp->foseg = val;
+ /* Update the corresponding bits in xstate_bv if any SSE/AVX
+ registers are changed. */
+ fp->xstate_bv |= xstate_bv;
}
static int
struct i387_fxsave *fxp = (struct i387_fxsave *) buf;
int i, top;
unsigned long val;
- unsigned int clear_bv;
+ unsigned long long clear_bv;
gdb_byte *p;
/* Amd64 has 16 xmm regs; I386 has 8 xmm regs. */
int num_xmm_registers = register_size (regcache->tdesc, 0) == 8 ? 16 : 8;
- /* The supported bits in `xstat_bv' are 1 byte. Clear part in
+ /* The supported bits in `xstat_bv' are 8 bytes. Clear part in
vector registers if its bit in xstat_bv is zero. */
clear_bv = (~fp->xstate_bv) & x86_xcr0;
}
}
- supply_register_by_name (regcache, "fioff", &fp->fioff);
- supply_register_by_name (regcache, "fooff", &fp->fooff);
- supply_register_by_name (regcache, "mxcsr", &fp->mxcsr);
+ if ((x86_xcr0 & X86_XSTATE_PKRU) != 0)
+ {
+ int pkru_regnum = find_regno (regcache->tdesc, "pkru");
- /* Some registers are 16-bit. */
- val = fp->fctrl & 0xFFFF;
- supply_register_by_name (regcache, "fctrl", &val);
+ if ((clear_bv & X86_XSTATE_PKRU) != 0)
+ {
+ for (i = 0; i < num_pkeys_registers; i++)
+ supply_register_zeroed (regcache, i + pkru_regnum);
+ }
+ else
+ {
+ p = (gdb_byte *) &fp->pkru_space[0];
+ for (i = 0; i < num_pkeys_registers; i++)
+ supply_register (regcache, i + pkru_regnum, p + i * 4);
+ }
+ }
- val = fp->fstat & 0xFFFF;
- supply_register_by_name (regcache, "fstat", &val);
+ if ((clear_bv & (X86_XSTATE_SSE | X86_XSTATE_AVX))
+ == (X86_XSTATE_SSE | X86_XSTATE_AVX))
+ {
+ unsigned int default_mxcsr = I387_MXCSR_INIT_VAL;
+ supply_register_by_name (regcache, "mxcsr", &default_mxcsr);
+ }
+ else
+ supply_register_by_name (regcache, "mxcsr", &fp->mxcsr);
- /* Generate the form of ftag data that GDB expects. */
- top = (fp->fstat >> 11) & 0x7;
- val = 0;
- for (i = 7; i >= 0; i--)
+ if ((clear_bv & X86_XSTATE_X87) != 0)
{
- int tag;
- if (fp->ftag & (1 << i))
- tag = i387_ftag (fxp, (i + 8 - top) % 8);
- else
- tag = 3;
- val |= tag << (2 * i);
+ supply_register_by_name_zeroed (regcache, "fioff");
+ supply_register_by_name_zeroed (regcache, "fooff");
+
+ val = I387_FCTRL_INIT_VAL;
+ supply_register_by_name (regcache, "fctrl", &val);
+
+ supply_register_by_name_zeroed (regcache, "fstat");
+
+ val = 0xFFFF;
+ supply_register_by_name (regcache, "ftag", &val);
+
+ supply_register_by_name_zeroed (regcache, "fiseg");
+ supply_register_by_name_zeroed (regcache, "foseg");
+ supply_register_by_name_zeroed (regcache, "fop");
}
- supply_register_by_name (regcache, "ftag", &val);
+ else
+ {
+ supply_register_by_name (regcache, "fioff", &fp->fioff);
+ supply_register_by_name (regcache, "fooff", &fp->fooff);
- val = fp->fiseg & 0xFFFF;
- supply_register_by_name (regcache, "fiseg", &val);
+ /* Some registers are 16-bit. */
+ val = fp->fctrl & 0xFFFF;
+ supply_register_by_name (regcache, "fctrl", &val);
- val = fp->foseg & 0xFFFF;
- supply_register_by_name (regcache, "foseg", &val);
+ val = fp->fstat & 0xFFFF;
+ supply_register_by_name (regcache, "fstat", &val);
- val = (fp->fop) & 0x7FF;
- supply_register_by_name (regcache, "fop", &val);
+ /* Generate the form of ftag data that GDB expects. */
+ top = (fp->fstat >> 11) & 0x7;
+ val = 0;
+ for (i = 7; i >= 0; i--)
+ {
+ int tag;
+ if (fp->ftag & (1 << i))
+ tag = i387_ftag (fxp, (i + 8 - top) % 8);
+ else
+ tag = 3;
+ val |= tag << (2 * i);
+ }
+ supply_register_by_name (regcache, "ftag", &val);
+
+ val = fp->fiseg & 0xFFFF;
+ supply_register_by_name (regcache, "fiseg", &val);
+
+ val = fp->foseg & 0xFFFF;
+ supply_register_by_name (regcache, "foseg", &val);
+
+ val = (fp->fop) & 0x7FF;
+ supply_register_by_name (regcache, "fop", &val);
+ }
}
/* Default to SSE. */
projects / deliverable / binutils-gdb.git / blobdiff