--- /dev/null
+/* Copyright (C) 2010 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 "lynx-low.h"
+
+#include <stdint.h>
+#include <limits.h>
+#include <sys/ptrace.h>
+
+/* The following two typedefs are defined in a .h file which is not
+ in the standard include path (/sys/include/family/x86/ucontext.h),
+ so we just duplicate them here. */
+
+/* General register context */
+typedef struct usr_econtext {
+
+ uint32_t uec_fault;
+ uint32_t uec_es;
+ uint32_t uec_ds;
+ uint32_t uec_edi;
+ uint32_t uec_esi;
+ uint32_t uec_ebp;
+ uint32_t uec_temp;
+ uint32_t uec_ebx;
+ uint32_t uec_edx;
+ uint32_t uec_ecx;
+ uint32_t uec_eax;
+ uint32_t uec_inum;
+ uint32_t uec_ecode;
+ uint32_t uec_eip;
+ uint32_t uec_cs;
+ uint32_t uec_eflags;
+ uint32_t uec_esp;
+ uint32_t uec_ss;
+ uint32_t uec_fs;
+ uint32_t uec_gs;
+} usr_econtext_t;
+
+/* Floating point and SIMD register context */
+typedef struct usr_fcontext {
+ uint16_t ufc_control;
+ uint16_t ufc_status;
+ uint16_t ufc_tag;
+ uint16_t ufc_opcode;
+ uint8_t *ufc_inst_off;
+ uint32_t ufc_inst_sel;
+ uint8_t *ufc_data_off;
+ uint32_t ufc_data_sel;
+ uint32_t usse_mxcsr;
+ uint32_t usse_mxcsr_mask;
+ struct ufp387_real {
+ uint16_t umant4;
+ uint16_t umant3;
+ uint16_t umant2;
+ uint16_t umant1;
+ uint16_t us_and_e;
+ uint16_t ureserved_1;
+ uint16_t ureserved_2;
+ uint16_t ureserved_3;
+ } ufc_reg[8];
+ struct uxmm_register {
+ uint16_t uchunk_1;
+ uint16_t uchunk_2;
+ uint16_t uchunk_3;
+ uint16_t uchunk_4;
+ uint16_t uchunk_5;
+ uint16_t uchunk_6;
+ uint16_t uchunk_7;
+ uint16_t uchunk_8;
+ } uxmm_reg[8];
+ char ureserved[16][14];
+} usr_fcontext_t;
+
+/* The index of various registers inside the regcache. */
+
+enum lynx_i386_gdb_regnum
+{
+ I386_EAX_REGNUM,
+ I386_ECX_REGNUM,
+ I386_EDX_REGNUM,
+ I386_EBX_REGNUM,
+ I386_ESP_REGNUM,
+ I386_EBP_REGNUM,
+ I386_ESI_REGNUM,
+ I386_EDI_REGNUM,
+ I386_EIP_REGNUM,
+ I386_EFLAGS_REGNUM,
+ I386_CS_REGNUM,
+ I386_SS_REGNUM,
+ I386_DS_REGNUM,
+ I386_ES_REGNUM,
+ I386_FS_REGNUM,
+ I386_GS_REGNUM,
+ I386_ST0_REGNUM,
+ I386_FCTRL_REGNUM = I386_ST0_REGNUM + 8,
+ I386_FSTAT_REGNUM,
+ I386_FTAG_REGNUM,
+ I386_FISEG_REGNUM,
+ I386_FIOFF_REGNUM,
+ I386_FOSEG_REGNUM,
+ I386_FOOFF_REGNUM,
+ I386_FOP_REGNUM,
+ I386_XMM0_REGNUM = 32,
+ I386_MXCSR_REGNUM = I386_XMM0_REGNUM + 8,
+ I386_SENTINEL_REGUM
+};
+
+/* Defined in auto-generated file i386.c. */
+extern void init_registers_i386 (void);
+
+/* The fill_function for the general-purpose register set. */
+
+static void
+lynx_i386_fill_gregset (struct regcache *regcache, char *buf)
+{
+#define lynx_i386_collect_gp(regnum, fld) \
+ collect_register (regcache, regnum, \
+ buf + offsetof (usr_econtext_t, uec_##fld))
+
+ lynx_i386_collect_gp (I386_EAX_REGNUM, eax);
+ lynx_i386_collect_gp (I386_ECX_REGNUM, ecx);
+ lynx_i386_collect_gp (I386_EDX_REGNUM, edx);
+ lynx_i386_collect_gp (I386_EBX_REGNUM, ebx);
+ lynx_i386_collect_gp (I386_ESP_REGNUM, esp);
+ lynx_i386_collect_gp (I386_EBP_REGNUM, ebp);
+ lynx_i386_collect_gp (I386_ESI_REGNUM, esi);
+ lynx_i386_collect_gp (I386_EDI_REGNUM, edi);
+ lynx_i386_collect_gp (I386_EIP_REGNUM, eip);
+ lynx_i386_collect_gp (I386_EFLAGS_REGNUM, eflags);
+ lynx_i386_collect_gp (I386_CS_REGNUM, cs);
+ lynx_i386_collect_gp (I386_SS_REGNUM, ss);
+ lynx_i386_collect_gp (I386_DS_REGNUM, ds);
+ lynx_i386_collect_gp (I386_ES_REGNUM, es);
+ lynx_i386_collect_gp (I386_FS_REGNUM, fs);
+ lynx_i386_collect_gp (I386_GS_REGNUM, gs);
+}
+
+/* The store_function for the general-purpose register set. */
+
+static void
+lynx_i386_store_gregset (struct regcache *regcache, const char *buf)
+{
+#define lynx_i386_supply_gp(regnum, fld) \
+ supply_register (regcache, regnum, \
+ buf + offsetof (usr_econtext_t, uec_##fld))
+
+ lynx_i386_supply_gp (I386_EAX_REGNUM, eax);
+ lynx_i386_supply_gp (I386_ECX_REGNUM, ecx);
+ lynx_i386_supply_gp (I386_EDX_REGNUM, edx);
+ lynx_i386_supply_gp (I386_EBX_REGNUM, ebx);
+ lynx_i386_supply_gp (I386_ESP_REGNUM, esp);
+ lynx_i386_supply_gp (I386_EBP_REGNUM, ebp);
+ lynx_i386_supply_gp (I386_ESI_REGNUM, esi);
+ lynx_i386_supply_gp (I386_EDI_REGNUM, edi);
+ lynx_i386_supply_gp (I386_EIP_REGNUM, eip);
+ lynx_i386_supply_gp (I386_EFLAGS_REGNUM, eflags);
+ lynx_i386_supply_gp (I386_CS_REGNUM, cs);
+ lynx_i386_supply_gp (I386_SS_REGNUM, ss);
+ lynx_i386_supply_gp (I386_DS_REGNUM, ds);
+ lynx_i386_supply_gp (I386_ES_REGNUM, es);
+ lynx_i386_supply_gp (I386_FS_REGNUM, fs);
+ lynx_i386_supply_gp (I386_GS_REGNUM, gs);
+}
+
+/* Extract the first 16 bits of register REGNUM in the REGCACHE,
+ and store these 2 bytes at DEST.
+
+ This is useful to collect certain 16bit registers which are known
+ by GDBserver as 32bit registers (such as the Control Register
+ for instance). */
+
+static void
+collect_16bit_register (struct regcache *regcache, int regnum, char *dest)
+{
+ gdb_byte word[4];
+
+ collect_register (regcache, regnum, word);
+ memcpy (dest, word, 2);
+}
+
+/* The fill_function for the floating-point register set. */
+
+static void
+lynx_i386_fill_fpregset (struct regcache *regcache, char *buf)
+{
+ int i;
+
+ /* Collect %st0 .. %st7. */
+ for (i = 0; i < 8; i++)
+ collect_register (regcache, I386_ST0_REGNUM + i,
+ buf + offsetof (usr_fcontext_t, ufc_reg)
+ + i * sizeof (struct ufp387_real));
+
+ /* Collect the other FPU registers. */
+ collect_16bit_register (regcache, I386_FCTRL_REGNUM,
+ buf + offsetof (usr_fcontext_t, ufc_control));
+ collect_16bit_register (regcache, I386_FSTAT_REGNUM,
+ buf + offsetof (usr_fcontext_t, ufc_status));
+ collect_16bit_register (regcache, I386_FTAG_REGNUM,
+ buf + offsetof (usr_fcontext_t, ufc_tag));
+ collect_register (regcache, I386_FISEG_REGNUM,
+ buf + offsetof (usr_fcontext_t, ufc_inst_sel));
+ collect_register (regcache, I386_FIOFF_REGNUM,
+ buf + offsetof (usr_fcontext_t, ufc_inst_off));
+ collect_register (regcache, I386_FOSEG_REGNUM,
+ buf + offsetof (usr_fcontext_t, ufc_data_sel));
+ collect_register (regcache, I386_FOOFF_REGNUM,
+ buf + offsetof (usr_fcontext_t, ufc_data_off));
+ collect_16bit_register (regcache, I386_FOP_REGNUM,
+ buf + offsetof (usr_fcontext_t, ufc_opcode));
+
+ /* Collect the XMM registers. */
+ for (i = 0; i < 8; i++)
+ collect_register (regcache, I386_XMM0_REGNUM + i,
+ buf + offsetof (usr_fcontext_t, uxmm_reg)
+ + i * sizeof (struct uxmm_register));
+ collect_register (regcache, I386_MXCSR_REGNUM,
+ buf + offsetof (usr_fcontext_t, usse_mxcsr));
+}
+
+/* This is the supply counterpart for collect_16bit_register:
+ It extracts a 2byte value from BUF, and uses that value to
+ set REGNUM's value in the regcache.
+
+ This is useful to supply the value of certain 16bit registers
+ which are known by GDBserver as 32bit registers (such as the Control
+ Register for instance). */
+
+static void
+supply_16bit_register (struct regcache *regcache, int regnum, const char *buf)
+{
+ gdb_byte word[4];
+
+ memcpy (word, buf, 2);
+ memset (word + 2, 0, 2);
+ supply_register (regcache, regnum, word);
+}
+
+/* The store_function for the floating-point register set. */
+
+static void
+lynx_i386_store_fpregset (struct regcache *regcache, const char *buf)
+{
+ int i;
+
+ /* Store the %st0 .. %st7 registers. */
+ for (i = 0; i < 8; i++)
+ supply_register (regcache, I386_ST0_REGNUM + i,
+ buf + offsetof (usr_fcontext_t, ufc_reg)
+ + i * sizeof (struct ufp387_real));
+
+ /* Store the other FPU registers. */
+ supply_16bit_register (regcache, I386_FCTRL_REGNUM,
+ buf + offsetof (usr_fcontext_t, ufc_control));
+ supply_16bit_register (regcache, I386_FSTAT_REGNUM,
+ buf + offsetof (usr_fcontext_t, ufc_status));
+ supply_16bit_register (regcache, I386_FTAG_REGNUM,
+ buf + offsetof (usr_fcontext_t, ufc_tag));
+ supply_register (regcache, I386_FISEG_REGNUM,
+ buf + offsetof (usr_fcontext_t, ufc_inst_sel));
+ supply_register (regcache, I386_FIOFF_REGNUM,
+ buf + offsetof (usr_fcontext_t, ufc_inst_off));
+ supply_register (regcache, I386_FOSEG_REGNUM,
+ buf + offsetof (usr_fcontext_t, ufc_data_sel));
+ supply_register (regcache, I386_FOOFF_REGNUM,
+ buf + offsetof (usr_fcontext_t, ufc_data_off));
+ supply_16bit_register (regcache, I386_FOP_REGNUM,
+ buf + offsetof (usr_fcontext_t, ufc_opcode));
+
+ /* Store the XMM registers. */
+ for (i = 0; i < 8; i++)
+ supply_register (regcache, I386_XMM0_REGNUM + i,
+ buf + offsetof (usr_fcontext_t, uxmm_reg)
+ + i * sizeof (struct uxmm_register));
+ supply_register (regcache, I386_MXCSR_REGNUM,
+ buf + offsetof (usr_fcontext_t, usse_mxcsr));
+}
+
+/* Implements the lynx_target_ops.arch_setup routine. */
+
+static void
+lynx_i386_arch_setup (void)
+{
+ init_registers_i386 ();
+}
+
+/* Description of all the x86-lynx register sets. */
+
+struct lynx_regset_info lynx_target_regsets[] = {
+ /* General Purpose Registers. */
+ {PTRACE_GETREGS, PTRACE_SETREGS, sizeof(usr_econtext_t),
+ lynx_i386_fill_gregset, lynx_i386_store_gregset},
+ /* Floating Point Registers. */
+ { PTRACE_GETFPREGS, PTRACE_SETFPREGS, sizeof(usr_fcontext_t),
+ lynx_i386_fill_fpregset, lynx_i386_store_fpregset },
+ /* End of list marker. */
+ {0, 0, -1, NULL, NULL }
+};
+
+/* The lynx_target_ops vector for x86-lynx. */
+
+struct lynx_target_ops the_low_target = {
+ lynx_i386_arch_setup,
+};
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