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- /* i387-specific utility functions, for the remote server for GDB.
- Copyright (C) 2000-2022 Free Software Foundation, Inc.
- This file is part of GDB.
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 3 of the License, or
- (at your option) any later version.
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>. */
- #include "server.h"
- #include "i387-fp.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_k_registers = 8;
- static const int num_pkeys_registers = 1;
- /* Note: These functions preserve the reserved bits in control registers.
- However, gdbserver promptly throws away that information. */
- /* These structs should have the proper sizes and alignment on both
- i386 and x86-64 machines. */
- struct i387_fsave {
- /* All these are only sixteen bits, plus padding, except for fop (which
- is only eleven bits), and fooff / fioff (which are 32 bits each). */
- unsigned short fctrl;
- unsigned short pad1;
- unsigned short fstat;
- unsigned short pad2;
- unsigned short ftag;
- unsigned short pad3;
- unsigned int fioff;
- unsigned short fiseg;
- unsigned short fop;
- unsigned int fooff;
- unsigned short foseg;
- unsigned short pad4;
- /* Space for eight 80-bit FP values. */
- unsigned char st_space[80];
- };
- struct i387_fxsave {
- /* All these are only sixteen bits, plus padding, except for fop (which
- is only eleven bits), and fooff / fioff (which are 32 bits each). */
- unsigned short fctrl;
- unsigned short fstat;
- unsigned short ftag;
- unsigned short fop;
- unsigned int fioff;
- unsigned short fiseg;
- unsigned short pad1;
- unsigned int fooff;
- unsigned short foseg;
- unsigned short pad12;
- unsigned int mxcsr;
- unsigned int pad3;
- /* Space for eight 80-bit FP values in 128-bit spaces. */
- unsigned char st_space[128];
- /* Space for eight 128-bit XMM values, or 16 on x86-64. */
- unsigned char xmm_space[256];
- };
- struct i387_xsave {
- /* All these are only sixteen bits, plus padding, except for fop (which
- is only eleven bits), and fooff / fioff (which are 32 bits each). */
- unsigned short fctrl;
- unsigned short fstat;
- unsigned short ftag;
- unsigned short fop;
- unsigned int fioff;
- unsigned short fiseg;
- unsigned short pad1;
- unsigned int fooff;
- unsigned short foseg;
- unsigned short pad12;
- unsigned int mxcsr;
- unsigned int mxcsr_mask;
- /* Space for eight 80-bit FP values in 128-bit spaces. */
- unsigned char st_space[128];
- /* Space for eight 128-bit XMM values, or 16 on x86-64. */
- unsigned char xmm_space[256];
- unsigned char reserved1[48];
- /* The extended control register 0 (the XFEATURE_ENABLED_MASK
- register). */
- unsigned long long xcr0;
- unsigned char reserved2[40];
- /* The XSTATE_BV bit vector. */
- unsigned long long xstate_bv;
- unsigned char reserved3[56];
- /* Space for eight upper 128-bit YMM values, or 16 on x86-64. */
- unsigned char ymmh_space[256];
- unsigned char reserved4[128];
- /* Space for 4 bound registers values of 128 bits. */
- unsigned char mpx_bnd_space[64];
- /* Space for 2 MPX configuration registers of 64 bits
- plus reserved space. */
- unsigned char mpx_cfg_space[16];
- unsigned char reserved5[48];
- /* Space for 8 OpMask register values of 64 bits. */
- unsigned char k_space[64];
- /* Space for 16 256-bit zmm0-15. */
- unsigned char zmmh_low_space[512];
- /* 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
- i387_cache_to_fsave (struct regcache *regcache, void *buf)
- {
- struct i387_fsave *fp = (struct i387_fsave *) buf;
- int i;
- int st0_regnum = find_regno (regcache->tdesc, "st0");
- unsigned long val2;
- for (i = 0; i < 8; i++)
- collect_register (regcache, i + st0_regnum,
- ((char *) &fp->st_space[0]) + i * 10);
- 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... */
- val2 = regcache_raw_get_unsigned_by_name (regcache, "fop");
- fp->fop = (val2 & 0x7FF) | (fp->fop & 0xF800);
- /* Some registers are 16-bit. */
- 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
- i387_fsave_to_cache (struct regcache *regcache, const void *buf)
- {
- struct i387_fsave *fp = (struct i387_fsave *) buf;
- int i;
- int st0_regnum = find_regno (regcache->tdesc, "st0");
- unsigned long val;
- for (i = 0; i < 8; i++)
- supply_register (regcache, i + st0_regnum,
- ((char *) &fp->st_space[0]) + i * 10);
- supply_register_by_name (regcache, "fioff", &fp->fioff);
- supply_register_by_name (regcache, "fooff", &fp->fooff);
- /* Some registers are 16-bit. */
- val = fp->fctrl & 0xFFFF;
- supply_register_by_name (regcache, "fctrl", &val);
- val = fp->fstat & 0xFFFF;
- supply_register_by_name (regcache, "fstat", &val);
- val = fp->ftag & 0xFFFF;
- 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);
- /* fop has only 11 valid bits. */
- val = (fp->fop) & 0x7FF;
- supply_register_by_name (regcache, "fop", &val);
- }
- void
- i387_cache_to_fxsave (struct regcache *regcache, void *buf)
- {
- struct i387_fxsave *fp = (struct i387_fxsave *) buf;
- int i;
- int st0_regnum = find_regno (regcache->tdesc, "st0");
- int xmm0_regnum = find_regno (regcache->tdesc, "xmm0");
- unsigned long val, val2;
- /* Amd64 has 16 xmm regs; I386 has 8 xmm regs. */
- int num_xmm_registers = register_size (regcache->tdesc, 0) == 8 ? 16 : 8;
- for (i = 0; i < 8; i++)
- collect_register (regcache, i + st0_regnum,
- ((char *) &fp->st_space[0]) + i * 16);
- for (i = 0; i < num_xmm_registers; i++)
- collect_register (regcache, i + xmm0_regnum,
- ((char *) &fp->xmm_space[0]) + i * 16);
- 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... */
- val2 = regcache_raw_get_unsigned_by_name (regcache, "fop");
- fp->fop = (val2 & 0x7FF) | (fp->fop & 0xF800);
- /* Some registers are 16-bit. */
- 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. */
- 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);
- }
- fp->ftag = val2;
- fp->fiseg = regcache_raw_get_unsigned_by_name (regcache, "fiseg");
- fp->foseg = regcache_raw_get_unsigned_by_name (regcache, "foseg");
- }
- void
- i387_cache_to_xsave (struct regcache *regcache, void *buf)
- {
- struct i387_xsave *fp = (struct i387_xsave *) buf;
- bool amd64 = register_size (regcache->tdesc, 0) == 8;
- int i;
- unsigned long val, val2;
- 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 = amd64 ? 16 : 8;
- /* AVX512 extends the existing xmm/ymm registers to a wider mode: zmm. */
- int num_avx512_zmmh_low_registers = num_xmm_registers;
- /* AVX512 adds 16 extra regs in Amd64 mode, but none in I386 mode.*/
- int num_avx512_zmmh_high_registers = amd64 ? 16 : 0;
- int num_avx512_ymmh_registers = amd64 ? 16 : 0;
- int num_avx512_xmm_registers = amd64 ? 16 : 0;
- /* 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;
- /* Clear part in x87 and vector registers if its bit in xstat_bv is
- zero. */
- 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);
- 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++)
- memset (((char *) &fp->xmm_space[0]) + i * 16, 0, 16);
- if ((clear_bv & X86_XSTATE_AVX))
- 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);
- if ((clear_bv & X86_XSTATE_BNDCFG))
- for (i = 0; i < num_mpx_cfg_registers; i++)
- memset (((char *) &fp->mpx_cfg_space[0]) + i * 8, 0, 8);
- if ((clear_bv & X86_XSTATE_K))
- for (i = 0; i < num_avx512_k_registers; i++)
- memset (((char *) &fp->k_space[0]) + i * 8, 0, 8);
- if ((clear_bv & X86_XSTATE_ZMM_H))
- for (i = 0; i < num_avx512_zmmh_low_registers; i++)
- memset (((char *) &fp->zmmh_low_space[0]) + i * 32, 0, 32);
- if ((clear_bv & X86_XSTATE_ZMM))
- {
- for (i = 0; i < num_avx512_zmmh_high_registers; i++)
- memset (((char *) &fp->zmmh_low_space[0]) + 32 + i * 64, 0, 32);
- for (i = 0; i < num_avx512_xmm_registers; i++)
- memset (((char *) &fp->zmmh_high_space[0]) + i * 64, 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. */
- if ((x86_xcr0 & X86_XSTATE_X87))
- {
- int st0_regnum = find_regno (regcache->tdesc, "st0");
- for (i = 0; i < 8; i++)
- {
- collect_register (regcache, i + st0_regnum, raw);
- p = ((char *) &fp->st_space[0]) + i * 16;
- if (memcmp (raw, p, 10))
- {
- xstate_bv |= X86_XSTATE_X87;
- memcpy (p, raw, 10);
- }
- }
- }
- /* Check if any SSE registers are changed. */
- if ((x86_xcr0 & X86_XSTATE_SSE))
- {
- int xmm0_regnum = find_regno (regcache->tdesc, "xmm0");
- for (i = 0; i < num_xmm_registers; i++)
- {
- collect_register (regcache, i + xmm0_regnum, raw);
- p = ((char *) &fp->xmm_space[0]) + i * 16;
- if (memcmp (raw, p, 16))
- {
- xstate_bv |= X86_XSTATE_SSE;
- memcpy (p, raw, 16);
- }
- }
- }
- /* Check if any AVX registers are changed. */
- if ((x86_xcr0 & X86_XSTATE_AVX))
- {
- int ymm0h_regnum = find_regno (regcache->tdesc, "ymm0h");
- for (i = 0; i < num_xmm_registers; i++)
- {
- collect_register (regcache, i + ymm0h_regnum, raw);
- p = ((char *) &fp->ymmh_space[0]) + i * 16;
- if (memcmp (raw, p, 16))
- {
- xstate_bv |= X86_XSTATE_AVX;
- memcpy (p, raw, 16);
- }
- }
- }
- /* Check if any bound register has changed. */
- if ((x86_xcr0 & X86_XSTATE_BNDREGS))
- {
- int bnd0r_regnum = find_regno (regcache->tdesc, "bnd0raw");
- for (i = 0; i < num_mpx_bnd_registers; i++)
- {
- collect_register (regcache, i + bnd0r_regnum, raw);
- p = ((char *) &fp->mpx_bnd_space[0]) + i * 16;
- if (memcmp (raw, p, 16))
- {
- xstate_bv |= X86_XSTATE_BNDREGS;
- memcpy (p, raw, 16);
- }
- }
- }
- /* Check if any status register has changed. */
- if ((x86_xcr0 & X86_XSTATE_BNDCFG))
- {
- int bndcfg_regnum = find_regno (regcache->tdesc, "bndcfgu");
- for (i = 0; i < num_mpx_cfg_registers; i++)
- {
- collect_register (regcache, i + bndcfg_regnum, raw);
- p = ((char *) &fp->mpx_cfg_space[0]) + i * 8;
- if (memcmp (raw, p, 8))
- {
- xstate_bv |= X86_XSTATE_BNDCFG;
- memcpy (p, raw, 8);
- }
- }
- }
- /* Check if any K registers are changed. */
- if ((x86_xcr0 & X86_XSTATE_K))
- {
- int k0_regnum = find_regno (regcache->tdesc, "k0");
- for (i = 0; i < num_avx512_k_registers; i++)
- {
- collect_register (regcache, i + k0_regnum, raw);
- p = ((char *) &fp->k_space[0]) + i * 8;
- if (memcmp (raw, p, 8) != 0)
- {
- xstate_bv |= X86_XSTATE_K;
- memcpy (p, raw, 8);
- }
- }
- }
- /* Check if any of ZMM0H-ZMM15H registers are changed. */
- if ((x86_xcr0 & X86_XSTATE_ZMM_H))
- {
- int zmm0h_regnum = find_regno (regcache->tdesc, "zmm0h");
- for (i = 0; i < num_avx512_zmmh_low_registers; i++)
- {
- collect_register (regcache, i + zmm0h_regnum, raw);
- p = ((char *) &fp->zmmh_low_space[0]) + i * 32;
- if (memcmp (raw, p, 32) != 0)
- {
- xstate_bv |= X86_XSTATE_ZMM_H;
- memcpy (p, raw, 32);
- }
- }
- }
- /* Check if any of ZMM16H-ZMM31H registers are changed. */
- if ((x86_xcr0 & X86_XSTATE_ZMM))
- {
- int zmm16h_regnum = (num_avx512_zmmh_high_registers == 0
- ? -1
- : find_regno (regcache->tdesc, "zmm16h"));
- for (i = 0; i < num_avx512_zmmh_high_registers; i++)
- {
- collect_register (regcache, i + zmm16h_regnum, raw);
- p = ((char *) &fp->zmmh_high_space[0]) + 32 + i * 64;
- if (memcmp (raw, p, 32) != 0)
- {
- xstate_bv |= X86_XSTATE_ZMM;
- memcpy (p, raw, 32);
- }
- }
- }
- /* Check if any XMM_AVX512 registers are changed. */
- if ((x86_xcr0 & X86_XSTATE_ZMM))
- {
- int xmm_avx512_regnum = (num_avx512_xmm_registers == 0
- ? -1
- : find_regno (regcache->tdesc, "xmm16"));
- for (i = 0; i < num_avx512_xmm_registers; i++)
- {
- collect_register (regcache, i + xmm_avx512_regnum, raw);
- p = ((char *) &fp->zmmh_high_space[0]) + i * 64;
- if (memcmp (raw, p, 16) != 0)
- {
- xstate_bv |= X86_XSTATE_ZMM;
- memcpy (p, raw, 16);
- }
- }
- }
- /* Check if any YMMH_AVX512 registers are changed. */
- if ((x86_xcr0 & X86_XSTATE_ZMM))
- {
- int ymmh_avx512_regnum = (num_avx512_ymmh_registers == 0
- ? -1
- : find_regno (regcache->tdesc, "ymm16h"));
- for (i = 0; i < num_avx512_ymmh_registers; i++)
- {
- collect_register (regcache, i + ymmh_avx512_regnum, raw);
- p = ((char *) &fp->zmmh_high_space[0]) + 16 + i * 64;
- if (memcmp (raw, p, 16) != 0)
- {
- xstate_bv |= X86_XSTATE_ZMM;
- memcpy (p, raw, 16);
- }
- }
- }
- /* Check if any PKEYS registers are changed. */
- if ((x86_xcr0 & X86_XSTATE_PKRU))
- {
- int pkru_regnum = find_regno (regcache->tdesc, "pkru");
- 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);
- }
- }
- }
- 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);
- }
- }
- 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, "fooff", raw);
- if (memcmp (raw, &fp->fooff, 4) != 0)
- {
- xstate_bv |= X86_XSTATE_X87;
- memcpy (&fp->fooff, raw, 4);
- }
- /* 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;
- }
- /* 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;
- }
- val = regcache_raw_get_unsigned_by_name (regcache, "foseg");
- if (fp->foseg != val)
- {
- xstate_bv |= X86_XSTATE_X87;
- fp->foseg = val;
- }
- }
- /* Update the corresponding bits in xstate_bv if any SSE/AVX
- registers are changed. */
- fp->xstate_bv |= xstate_bv;
- }
- static int
- i387_ftag (struct i387_fxsave *fp, int regno)
- {
- unsigned char *raw = &fp->st_space[regno * 16];
- unsigned int exponent;
- unsigned long fraction[2];
- int integer;
- integer = raw[7] & 0x80;
- exponent = (((raw[9] & 0x7f) << 8) | raw[8]);
- fraction[0] = ((raw[3] << 24) | (raw[2] << 16) | (raw[1] << 8) | raw[0]);
- fraction[1] = (((raw[7] & 0x7f) << 24) | (raw[6] << 16)
- | (raw[5] << 8) | raw[4]);
- if (exponent == 0x7fff)
- {
- /* Special. */
- return (2);
- }
- else if (exponent == 0x0000)
- {
- if (fraction[0] == 0x0000 && fraction[1] == 0x0000 && !integer)
- {
- /* Zero. */
- return (1);
- }
- else
- {
- /* Special. */
- return (2);
- }
- }
- else
- {
- if (integer)
- {
- /* Valid. */
- return (0);
- }
- else
- {
- /* Special. */
- return (2);
- }
- }
- }
- void
- i387_fxsave_to_cache (struct regcache *regcache, const void *buf)
- {
- struct i387_fxsave *fp = (struct i387_fxsave *) buf;
- int i, top;
- int st0_regnum = find_regno (regcache->tdesc, "st0");
- int xmm0_regnum = find_regno (regcache->tdesc, "xmm0");
- unsigned long val;
- /* Amd64 has 16 xmm regs; I386 has 8 xmm regs. */
- int num_xmm_registers = register_size (regcache->tdesc, 0) == 8 ? 16 : 8;
- for (i = 0; i < 8; i++)
- supply_register (regcache, i + st0_regnum,
- ((char *) &fp->st_space[0]) + i * 16);
- for (i = 0; i < num_xmm_registers; i++)
- supply_register (regcache, i + xmm0_regnum,
- ((char *) &fp->xmm_space[0]) + i * 16);
- supply_register_by_name (regcache, "fioff", &fp->fioff);
- supply_register_by_name (regcache, "fooff", &fp->fooff);
- supply_register_by_name (regcache, "mxcsr", &fp->mxcsr);
- /* Some registers are 16-bit. */
- val = fp->fctrl & 0xFFFF;
- supply_register_by_name (regcache, "fctrl", &val);
- val = fp->fstat & 0xFFFF;
- supply_register_by_name (regcache, "fstat", &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 (fp, (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);
- }
- void
- i387_xsave_to_cache (struct regcache *regcache, const void *buf)
- {
- struct i387_xsave *fp = (struct i387_xsave *) buf;
- struct i387_fxsave *fxp = (struct i387_fxsave *) buf;
- bool amd64 = register_size (regcache->tdesc, 0) == 8;
- int i, top;
- unsigned long val;
- unsigned long long clear_bv;
- gdb_byte *p;
- /* Amd64 has 16 xmm regs; I386 has 8 xmm regs. */
- int num_xmm_registers = amd64 ? 16 : 8;
- /* AVX512 extends the existing xmm/ymm registers to a wider mode: zmm. */
- int num_avx512_zmmh_low_registers = num_xmm_registers;
- /* AVX512 adds 16 extra regs in Amd64 mode, but none in I386 mode.*/
- int num_avx512_zmmh_high_registers = amd64 ? 16 : 0;
- int num_avx512_ymmh_registers = amd64 ? 16 : 0;
- int num_avx512_xmm_registers = amd64 ? 16 : 0;
- /* 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;
- /* Check if any x87 registers are changed. */
- if ((x86_xcr0 & X86_XSTATE_X87) != 0)
- {
- int st0_regnum = find_regno (regcache->tdesc, "st0");
- if ((clear_bv & X86_XSTATE_X87) != 0)
- {
- for (i = 0; i < 8; i++)
- supply_register_zeroed (regcache, i + st0_regnum);
- }
- else
- {
- p = (gdb_byte *) &fp->st_space[0];
- for (i = 0; i < 8; i++)
- supply_register (regcache, i + st0_regnum, p + i * 16);
- }
- }
- if ((x86_xcr0 & X86_XSTATE_SSE) != 0)
- {
- int xmm0_regnum = find_regno (regcache->tdesc, "xmm0");
- if ((clear_bv & X86_XSTATE_SSE))
- {
- for (i = 0; i < num_xmm_registers; i++)
- supply_register_zeroed (regcache, i + xmm0_regnum);
- }
- else
- {
- p = (gdb_byte *) &fp->xmm_space[0];
- for (i = 0; i < num_xmm_registers; i++)
- supply_register (regcache, i + xmm0_regnum, p + i * 16);
- }
- }
- if ((x86_xcr0 & X86_XSTATE_AVX) != 0)
- {
- int ymm0h_regnum = find_regno (regcache->tdesc, "ymm0h");
- if ((clear_bv & X86_XSTATE_AVX) != 0)
- {
- for (i = 0; i < num_xmm_registers; i++)
- supply_register_zeroed (regcache, i + ymm0h_regnum);
- }
- else
- {
- p = (gdb_byte *) &fp->ymmh_space[0];
- for (i = 0; i < num_xmm_registers; i++)
- supply_register (regcache, i + ymm0h_regnum, p + i * 16);
- }
- }
- if ((x86_xcr0 & X86_XSTATE_BNDREGS))
- {
- int bnd0r_regnum = find_regno (regcache->tdesc, "bnd0raw");
- if ((clear_bv & X86_XSTATE_BNDREGS) != 0)
- {
- for (i = 0; i < num_mpx_bnd_registers; i++)
- supply_register_zeroed (regcache, i + bnd0r_regnum);
- }
- else
- {
- p = (gdb_byte *) &fp->mpx_bnd_space[0];
- for (i = 0; i < num_mpx_bnd_registers; i++)
- supply_register (regcache, i + bnd0r_regnum, p + i * 16);
- }
- }
- if ((x86_xcr0 & X86_XSTATE_BNDCFG))
- {
- int bndcfg_regnum = find_regno (regcache->tdesc, "bndcfgu");
- if ((clear_bv & X86_XSTATE_BNDCFG) != 0)
- {
- for (i = 0; i < num_mpx_cfg_registers; i++)
- supply_register_zeroed (regcache, i + bndcfg_regnum);
- }
- else
- {
- p = (gdb_byte *) &fp->mpx_cfg_space[0];
- for (i = 0; i < num_mpx_cfg_registers; i++)
- supply_register (regcache, i + bndcfg_regnum, p + i * 8);
- }
- }
- if ((x86_xcr0 & X86_XSTATE_K) != 0)
- {
- int k0_regnum = find_regno (regcache->tdesc, "k0");
- if ((clear_bv & X86_XSTATE_K) != 0)
- {
- for (i = 0; i < num_avx512_k_registers; i++)
- supply_register_zeroed (regcache, i + k0_regnum);
- }
- else
- {
- p = (gdb_byte *) &fp->k_space[0];
- for (i = 0; i < num_avx512_k_registers; i++)
- supply_register (regcache, i + k0_regnum, p + i * 8);
- }
- }
- if ((x86_xcr0 & X86_XSTATE_ZMM_H) != 0)
- {
- int zmm0h_regnum = find_regno (regcache->tdesc, "zmm0h");
- if ((clear_bv & X86_XSTATE_ZMM_H) != 0)
- {
- for (i = 0; i < num_avx512_zmmh_low_registers; i++)
- supply_register_zeroed (regcache, i + zmm0h_regnum);
- }
- else
- {
- p = (gdb_byte *) &fp->zmmh_low_space[0];
- for (i = 0; i < num_avx512_zmmh_low_registers; i++)
- supply_register (regcache, i + zmm0h_regnum, p + i * 32);
- }
- }
- if ((x86_xcr0 & X86_XSTATE_ZMM) != 0)
- {
- int zmm16h_regnum = (num_avx512_zmmh_high_registers == 0
- ? -1
- : find_regno (regcache->tdesc, "zmm16h"));
- int ymm16h_regnum = (num_avx512_ymmh_registers == 0
- ? -1
- : find_regno (regcache->tdesc, "ymm16h"));
- int xmm16_regnum = (num_avx512_xmm_registers == 0
- ? -1
- : find_regno (regcache->tdesc, "xmm16"));
- if ((clear_bv & X86_XSTATE_ZMM) != 0)
- {
- for (i = 0; i < num_avx512_zmmh_high_registers; i++)
- supply_register_zeroed (regcache, i + zmm16h_regnum);
- for (i = 0; i < num_avx512_ymmh_registers; i++)
- supply_register_zeroed (regcache, i + ymm16h_regnum);
- for (i = 0; i < num_avx512_xmm_registers; i++)
- supply_register_zeroed (regcache, i + xmm16_regnum);
- }
- else
- {
- p = (gdb_byte *) &fp->zmmh_high_space[0];
- for (i = 0; i < num_avx512_zmmh_high_registers; i++)
- supply_register (regcache, i + zmm16h_regnum, p + 32 + i * 64);
- for (i = 0; i < num_avx512_ymmh_registers; i++)
- supply_register (regcache, i + ymm16h_regnum, p + 16 + i * 64);
- for (i = 0; i < num_avx512_xmm_registers; i++)
- supply_register (regcache, i + xmm16_regnum, p + i * 64);
- }
- }
- if ((x86_xcr0 & X86_XSTATE_PKRU) != 0)
- {
- int pkru_regnum = find_regno (regcache->tdesc, "pkru");
- 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);
- }
- }
- 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);
- if ((clear_bv & X86_XSTATE_X87) != 0)
- {
- 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");
- }
- else
- {
- supply_register_by_name (regcache, "fioff", &fp->fioff);
- supply_register_by_name (regcache, "fooff", &fp->fooff);
- /* Some registers are 16-bit. */
- val = fp->fctrl & 0xFFFF;
- supply_register_by_name (regcache, "fctrl", &val);
- val = fp->fstat & 0xFFFF;
- supply_register_by_name (regcache, "fstat", &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. */
- unsigned long long x86_xcr0 = X86_XSTATE_SSE_MASK;
|