| /* GNU/Linux on ARM native support. |
| Copyright 1999, 2000, 2001, 2002 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 2 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, write to the Free Software |
| Foundation, Inc., 59 Temple Place - Suite 330, |
| Boston, MA 02111-1307, USA. */ |
| |
| #include "defs.h" |
| #include "inferior.h" |
| #include "gdbcore.h" |
| #include "gdb_string.h" |
| #include "regcache.h" |
| |
| #include "arm-tdep.h" |
| |
| #include <sys/user.h> |
| #include <sys/ptrace.h> |
| #include <sys/utsname.h> |
| #include <sys/procfs.h> |
| |
| /* Prototypes for supply_gregset etc. */ |
| #include "gregset.h" |
| |
| extern int arm_apcs_32; |
| |
| #define typeNone 0x00 |
| #define typeSingle 0x01 |
| #define typeDouble 0x02 |
| #define typeExtended 0x03 |
| #define FPWORDS 28 |
| #define ARM_CPSR_REGNUM 16 |
| |
| typedef union tagFPREG |
| { |
| unsigned int fSingle; |
| unsigned int fDouble[2]; |
| unsigned int fExtended[3]; |
| } |
| FPREG; |
| |
| typedef struct tagFPA11 |
| { |
| FPREG fpreg[8]; /* 8 floating point registers */ |
| unsigned int fpsr; /* floating point status register */ |
| unsigned int fpcr; /* floating point control register */ |
| unsigned char fType[8]; /* type of floating point value held in |
| floating point registers. */ |
| int initflag; /* NWFPE initialization flag. */ |
| } |
| FPA11; |
| |
| /* The following variables are used to determine the version of the |
| underlying GNU/Linux operating system. Examples: |
| |
| GNU/Linux 2.0.35 GNU/Linux 2.2.12 |
| os_version = 0x00020023 os_version = 0x0002020c |
| os_major = 2 os_major = 2 |
| os_minor = 0 os_minor = 2 |
| os_release = 35 os_release = 12 |
| |
| Note: os_version = (os_major << 16) | (os_minor << 8) | os_release |
| |
| These are initialized using get_linux_version() from |
| _initialize_arm_linux_nat(). */ |
| |
| static unsigned int os_version, os_major, os_minor, os_release; |
| |
| /* On GNU/Linux, threads are implemented as pseudo-processes, in which |
| case we may be tracing more than one process at a time. In that |
| case, inferior_ptid will contain the main process ID and the |
| individual thread (process) ID. get_thread_id () is used to get |
| the thread id if it's available, and the process id otherwise. */ |
| |
| int |
| get_thread_id (ptid_t ptid) |
| { |
| int tid = TIDGET (ptid); |
| if (0 == tid) |
| tid = PIDGET (ptid); |
| return tid; |
| } |
| #define GET_THREAD_ID(PTID) get_thread_id ((PTID)); |
| |
| static void |
| fetch_nwfpe_single (unsigned int fn, FPA11 * fpa11) |
| { |
| unsigned int mem[3]; |
| |
| mem[0] = fpa11->fpreg[fn].fSingle; |
| mem[1] = 0; |
| mem[2] = 0; |
| supply_register (ARM_F0_REGNUM + fn, (char *) &mem[0]); |
| } |
| |
| static void |
| fetch_nwfpe_double (unsigned int fn, FPA11 * fpa11) |
| { |
| unsigned int mem[3]; |
| |
| mem[0] = fpa11->fpreg[fn].fDouble[1]; |
| mem[1] = fpa11->fpreg[fn].fDouble[0]; |
| mem[2] = 0; |
| supply_register (ARM_F0_REGNUM + fn, (char *) &mem[0]); |
| } |
| |
| static void |
| fetch_nwfpe_none (unsigned int fn) |
| { |
| unsigned int mem[3] = |
| {0, 0, 0}; |
| |
| supply_register (ARM_F0_REGNUM + fn, (char *) &mem[0]); |
| } |
| |
| static void |
| fetch_nwfpe_extended (unsigned int fn, FPA11 * fpa11) |
| { |
| unsigned int mem[3]; |
| |
| mem[0] = fpa11->fpreg[fn].fExtended[0]; /* sign & exponent */ |
| mem[1] = fpa11->fpreg[fn].fExtended[2]; /* ls bits */ |
| mem[2] = fpa11->fpreg[fn].fExtended[1]; /* ms bits */ |
| supply_register (ARM_F0_REGNUM + fn, (char *) &mem[0]); |
| } |
| |
| static void |
| fetch_nwfpe_register (int regno, FPA11 * fpa11) |
| { |
| int fn = regno - ARM_F0_REGNUM; |
| |
| switch (fpa11->fType[fn]) |
| { |
| case typeSingle: |
| fetch_nwfpe_single (fn, fpa11); |
| break; |
| |
| case typeDouble: |
| fetch_nwfpe_double (fn, fpa11); |
| break; |
| |
| case typeExtended: |
| fetch_nwfpe_extended (fn, fpa11); |
| break; |
| |
| default: |
| fetch_nwfpe_none (fn); |
| } |
| } |
| |
| static void |
| store_nwfpe_single (unsigned int fn, FPA11 *fpa11) |
| { |
| unsigned int mem[3]; |
| |
| regcache_collect (ARM_F0_REGNUM + fn, (char *) &mem[0]); |
| fpa11->fpreg[fn].fSingle = mem[0]; |
| fpa11->fType[fn] = typeSingle; |
| } |
| |
| static void |
| store_nwfpe_double (unsigned int fn, FPA11 *fpa11) |
| { |
| unsigned int mem[3]; |
| |
| regcache_collect (ARM_F0_REGNUM + fn, (char *) &mem[0]); |
| fpa11->fpreg[fn].fDouble[1] = mem[0]; |
| fpa11->fpreg[fn].fDouble[0] = mem[1]; |
| fpa11->fType[fn] = typeDouble; |
| } |
| |
| void |
| store_nwfpe_extended (unsigned int fn, FPA11 *fpa11) |
| { |
| unsigned int mem[3]; |
| |
| regcache_collect (ARM_F0_REGNUM + fn, (char *) &mem[0]); |
| fpa11->fpreg[fn].fExtended[0] = mem[0]; /* sign & exponent */ |
| fpa11->fpreg[fn].fExtended[2] = mem[1]; /* ls bits */ |
| fpa11->fpreg[fn].fExtended[1] = mem[2]; /* ms bits */ |
| fpa11->fType[fn] = typeDouble; |
| } |
| |
| void |
| store_nwfpe_register (int regno, FPA11 * fpa11) |
| { |
| if (register_cached (regno)) |
| { |
| unsigned int fn = regno - ARM_F0_REGNUM; |
| switch (fpa11->fType[fn]) |
| { |
| case typeSingle: |
| store_nwfpe_single (fn, fpa11); |
| break; |
| |
| case typeDouble: |
| store_nwfpe_double (fn, fpa11); |
| break; |
| |
| case typeExtended: |
| store_nwfpe_extended (fn, fpa11); |
| break; |
| } |
| } |
| } |
| |
| |
| /* Get the value of a particular register from the floating point |
| state of the process and store it into regcache. */ |
| |
| static void |
| fetch_fpregister (int regno) |
| { |
| int ret, tid; |
| FPA11 fp; |
| |
| /* Get the thread id for the ptrace call. */ |
| tid = GET_THREAD_ID (inferior_ptid); |
| |
| /* Read the floating point state. */ |
| ret = ptrace (PT_GETFPREGS, tid, 0, &fp); |
| if (ret < 0) |
| { |
| warning ("Unable to fetch floating point register."); |
| return; |
| } |
| |
| /* Fetch fpsr. */ |
| if (ARM_FPS_REGNUM == regno) |
| supply_register (ARM_FPS_REGNUM, (char *) &fp.fpsr); |
| |
| /* Fetch the floating point register. */ |
| if (regno >= ARM_F0_REGNUM && regno <= ARM_F7_REGNUM) |
| { |
| int fn = regno - ARM_F0_REGNUM; |
| |
| switch (fp.fType[fn]) |
| { |
| case typeSingle: |
| fetch_nwfpe_single (fn, &fp); |
| break; |
| |
| case typeDouble: |
| fetch_nwfpe_double (fn, &fp); |
| break; |
| |
| case typeExtended: |
| fetch_nwfpe_extended (fn, &fp); |
| break; |
| |
| default: |
| fetch_nwfpe_none (fn); |
| } |
| } |
| } |
| |
| /* Get the whole floating point state of the process and store it |
| into regcache. */ |
| |
| static void |
| fetch_fpregs (void) |
| { |
| int ret, regno, tid; |
| FPA11 fp; |
| |
| /* Get the thread id for the ptrace call. */ |
| tid = GET_THREAD_ID (inferior_ptid); |
| |
| /* Read the floating point state. */ |
| ret = ptrace (PT_GETFPREGS, tid, 0, &fp); |
| if (ret < 0) |
| { |
| warning ("Unable to fetch the floating point registers."); |
| return; |
| } |
| |
| /* Fetch fpsr. */ |
| supply_register (ARM_FPS_REGNUM, (char *) &fp.fpsr); |
| |
| /* Fetch the floating point registers. */ |
| for (regno = ARM_F0_REGNUM; regno <= ARM_F7_REGNUM; regno++) |
| { |
| int fn = regno - ARM_F0_REGNUM; |
| |
| switch (fp.fType[fn]) |
| { |
| case typeSingle: |
| fetch_nwfpe_single (fn, &fp); |
| break; |
| |
| case typeDouble: |
| fetch_nwfpe_double (fn, &fp); |
| break; |
| |
| case typeExtended: |
| fetch_nwfpe_extended (fn, &fp); |
| break; |
| |
| default: |
| fetch_nwfpe_none (fn); |
| } |
| } |
| } |
| |
| /* Save a particular register into the floating point state of the |
| process using the contents from regcache. */ |
| |
| static void |
| store_fpregister (int regno) |
| { |
| int ret, tid; |
| FPA11 fp; |
| |
| /* Get the thread id for the ptrace call. */ |
| tid = GET_THREAD_ID (inferior_ptid); |
| |
| /* Read the floating point state. */ |
| ret = ptrace (PT_GETFPREGS, tid, 0, &fp); |
| if (ret < 0) |
| { |
| warning ("Unable to fetch the floating point registers."); |
| return; |
| } |
| |
| /* Store fpsr. */ |
| if (ARM_FPS_REGNUM == regno && register_cached (ARM_FPS_REGNUM)) |
| regcache_collect (ARM_FPS_REGNUM, (char *) &fp.fpsr); |
| |
| /* Store the floating point register. */ |
| if (regno >= ARM_F0_REGNUM && regno <= ARM_F7_REGNUM) |
| { |
| store_nwfpe_register (regno, &fp); |
| } |
| |
| ret = ptrace (PTRACE_SETFPREGS, tid, 0, &fp); |
| if (ret < 0) |
| { |
| warning ("Unable to store floating point register."); |
| return; |
| } |
| } |
| |
| /* Save the whole floating point state of the process using |
| the contents from regcache. */ |
| |
| static void |
| store_fpregs (void) |
| { |
| int ret, regno, tid; |
| FPA11 fp; |
| |
| /* Get the thread id for the ptrace call. */ |
| tid = GET_THREAD_ID (inferior_ptid); |
| |
| /* Read the floating point state. */ |
| ret = ptrace (PT_GETFPREGS, tid, 0, &fp); |
| if (ret < 0) |
| { |
| warning ("Unable to fetch the floating point registers."); |
| return; |
| } |
| |
| /* Store fpsr. */ |
| if (register_cached (ARM_FPS_REGNUM)) |
| regcache_collect (ARM_FPS_REGNUM, (char *) &fp.fpsr); |
| |
| /* Store the floating point registers. */ |
| for (regno = ARM_F0_REGNUM; regno <= ARM_F7_REGNUM; regno++) |
| { |
| fetch_nwfpe_register (regno, &fp); |
| } |
| |
| ret = ptrace (PTRACE_SETFPREGS, tid, 0, &fp); |
| if (ret < 0) |
| { |
| warning ("Unable to store floating point registers."); |
| return; |
| } |
| } |
| |
| /* Fetch a general register of the process and store into |
| regcache. */ |
| |
| static void |
| fetch_register (int regno) |
| { |
| int ret, tid; |
| elf_gregset_t regs; |
| |
| /* Get the thread id for the ptrace call. */ |
| tid = GET_THREAD_ID (inferior_ptid); |
| |
| ret = ptrace (PTRACE_GETREGS, tid, 0, ®s); |
| if (ret < 0) |
| { |
| warning ("Unable to fetch general register."); |
| return; |
| } |
| |
| if (regno >= ARM_A1_REGNUM && regno < ARM_PC_REGNUM) |
| supply_register (regno, (char *) ®s[regno]); |
| |
| if (ARM_PS_REGNUM == regno) |
| { |
| if (arm_apcs_32) |
| supply_register (ARM_PS_REGNUM, (char *) ®s[ARM_CPSR_REGNUM]); |
| else |
| supply_register (ARM_PS_REGNUM, (char *) ®s[ARM_PC_REGNUM]); |
| } |
| |
| if (ARM_PC_REGNUM == regno) |
| { |
| regs[ARM_PC_REGNUM] = ADDR_BITS_REMOVE (regs[ARM_PC_REGNUM]); |
| supply_register (ARM_PC_REGNUM, (char *) ®s[ARM_PC_REGNUM]); |
| } |
| } |
| |
| /* Fetch all general registers of the process and store into |
| regcache. */ |
| |
| static void |
| fetch_regs (void) |
| { |
| int ret, regno, tid; |
| elf_gregset_t regs; |
| |
| /* Get the thread id for the ptrace call. */ |
| tid = GET_THREAD_ID (inferior_ptid); |
| |
| ret = ptrace (PTRACE_GETREGS, tid, 0, ®s); |
| if (ret < 0) |
| { |
| warning ("Unable to fetch general registers."); |
| return; |
| } |
| |
| for (regno = ARM_A1_REGNUM; regno < ARM_PC_REGNUM; regno++) |
| supply_register (regno, (char *) ®s[regno]); |
| |
| if (arm_apcs_32) |
| supply_register (ARM_PS_REGNUM, (char *) ®s[ARM_CPSR_REGNUM]); |
| else |
| supply_register (ARM_PS_REGNUM, (char *) ®s[ARM_PC_REGNUM]); |
| |
| regs[ARM_PC_REGNUM] = ADDR_BITS_REMOVE (regs[ARM_PC_REGNUM]); |
| supply_register (ARM_PC_REGNUM, (char *) ®s[ARM_PC_REGNUM]); |
| } |
| |
| /* Store all general registers of the process from the values in |
| regcache. */ |
| |
| static void |
| store_register (int regno) |
| { |
| int ret, tid; |
| elf_gregset_t regs; |
| |
| if (!register_cached (regno)) |
| return; |
| |
| /* Get the thread id for the ptrace call. */ |
| tid = GET_THREAD_ID (inferior_ptid); |
| |
| /* Get the general registers from the process. */ |
| ret = ptrace (PTRACE_GETREGS, tid, 0, ®s); |
| if (ret < 0) |
| { |
| warning ("Unable to fetch general registers."); |
| return; |
| } |
| |
| if (regno >= ARM_A1_REGNUM && regno <= ARM_PC_REGNUM) |
| regcache_collect (regno, (char *) ®s[regno]); |
| |
| ret = ptrace (PTRACE_SETREGS, tid, 0, ®s); |
| if (ret < 0) |
| { |
| warning ("Unable to store general register."); |
| return; |
| } |
| } |
| |
| static void |
| store_regs (void) |
| { |
| int ret, regno, tid; |
| elf_gregset_t regs; |
| |
| /* Get the thread id for the ptrace call. */ |
| tid = GET_THREAD_ID (inferior_ptid); |
| |
| /* Fetch the general registers. */ |
| ret = ptrace (PTRACE_GETREGS, tid, 0, ®s); |
| if (ret < 0) |
| { |
| warning ("Unable to fetch general registers."); |
| return; |
| } |
| |
| for (regno = ARM_A1_REGNUM; regno <= ARM_PC_REGNUM; regno++) |
| { |
| if (register_cached (regno)) |
| regcache_collect (regno, (char *) ®s[regno]); |
| } |
| |
| ret = ptrace (PTRACE_SETREGS, tid, 0, ®s); |
| |
| if (ret < 0) |
| { |
| warning ("Unable to store general registers."); |
| return; |
| } |
| } |
| |
| /* Fetch registers from the child process. Fetch all registers if |
| regno == -1, otherwise fetch all general registers or all floating |
| point registers depending upon the value of regno. */ |
| |
| void |
| fetch_inferior_registers (int regno) |
| { |
| if (-1 == regno) |
| { |
| fetch_regs (); |
| fetch_fpregs (); |
| } |
| else |
| { |
| if (regno < ARM_F0_REGNUM || regno > ARM_FPS_REGNUM) |
| fetch_register (regno); |
| |
| if (regno >= ARM_F0_REGNUM && regno <= ARM_FPS_REGNUM) |
| fetch_fpregister (regno); |
| } |
| } |
| |
| /* Store registers back into the inferior. Store all registers if |
| regno == -1, otherwise store all general registers or all floating |
| point registers depending upon the value of regno. */ |
| |
| void |
| store_inferior_registers (int regno) |
| { |
| if (-1 == regno) |
| { |
| store_regs (); |
| store_fpregs (); |
| } |
| else |
| { |
| if ((regno < ARM_F0_REGNUM) || (regno > ARM_FPS_REGNUM)) |
| store_register (regno); |
| |
| if ((regno >= ARM_F0_REGNUM) && (regno <= ARM_FPS_REGNUM)) |
| store_fpregister (regno); |
| } |
| } |
| |
| /* Fill register regno (if it is a general-purpose register) in |
| *gregsetp with the appropriate value from GDB's register array. |
| If regno is -1, do this for all registers. */ |
| |
| void |
| fill_gregset (gdb_gregset_t *gregsetp, int regno) |
| { |
| if (-1 == regno) |
| { |
| int regnum; |
| for (regnum = ARM_A1_REGNUM; regnum <= ARM_PC_REGNUM; regnum++) |
| regcache_collect (regnum, (char *) &(*gregsetp)[regnum]); |
| } |
| else if (regno >= ARM_A1_REGNUM && regno <= ARM_PC_REGNUM) |
| regcache_collect (regno, (char *) &(*gregsetp)[regno]); |
| |
| if (ARM_PS_REGNUM == regno || -1 == regno) |
| { |
| if (arm_apcs_32) |
| regcache_collect (ARM_PS_REGNUM, |
| (char *) &(*gregsetp)[ARM_CPSR_REGNUM]); |
| else |
| regcache_collect (ARM_PC_REGNUM, |
| (char *) &(*gregsetp)[ARM_PC_REGNUM]); |
| } |
| } |
| |
| /* Fill GDB's register array with the general-purpose register values |
| in *gregsetp. */ |
| |
| void |
| supply_gregset (gdb_gregset_t *gregsetp) |
| { |
| int regno, reg_pc; |
| |
| for (regno = ARM_A1_REGNUM; regno < ARM_PC_REGNUM; regno++) |
| supply_register (regno, (char *) &(*gregsetp)[regno]); |
| |
| if (arm_apcs_32) |
| supply_register (ARM_PS_REGNUM, (char *) &(*gregsetp)[ARM_CPSR_REGNUM]); |
| else |
| supply_register (ARM_PS_REGNUM, (char *) &(*gregsetp)[ARM_PC_REGNUM]); |
| |
| reg_pc = ADDR_BITS_REMOVE ((CORE_ADDR)(*gregsetp)[ARM_PC_REGNUM]); |
| supply_register (ARM_PC_REGNUM, (char *) ®_pc); |
| } |
| |
| /* Fill register regno (if it is a floating-point register) in |
| *fpregsetp with the appropriate value from GDB's register array. |
| If regno is -1, do this for all registers. */ |
| |
| void |
| fill_fpregset (gdb_fpregset_t *fpregsetp, int regno) |
| { |
| FPA11 *fp = (FPA11 *) fpregsetp; |
| |
| if (-1 == regno) |
| { |
| int regnum; |
| for (regnum = ARM_F0_REGNUM; regnum <= ARM_F7_REGNUM; regnum++) |
| store_nwfpe_register (regnum, fp); |
| } |
| else if (regno >= ARM_F0_REGNUM && regno <= ARM_F7_REGNUM) |
| { |
| store_nwfpe_register (regno, fp); |
| return; |
| } |
| |
| /* Store fpsr. */ |
| if (ARM_FPS_REGNUM == regno || -1 == regno) |
| regcache_collect (ARM_FPS_REGNUM, (char *) &fp->fpsr); |
| } |
| |
| /* Fill GDB's register array with the floating-point register values |
| in *fpregsetp. */ |
| |
| void |
| supply_fpregset (gdb_fpregset_t *fpregsetp) |
| { |
| int regno; |
| FPA11 *fp = (FPA11 *) fpregsetp; |
| |
| /* Fetch fpsr. */ |
| supply_register (ARM_FPS_REGNUM, (char *) &fp->fpsr); |
| |
| /* Fetch the floating point registers. */ |
| for (regno = ARM_F0_REGNUM; regno <= ARM_F7_REGNUM; regno++) |
| { |
| fetch_nwfpe_register (regno, fp); |
| } |
| } |
| |
| int |
| arm_linux_kernel_u_size (void) |
| { |
| return (sizeof (struct user)); |
| } |
| |
| static unsigned int |
| get_linux_version (unsigned int *vmajor, |
| unsigned int *vminor, |
| unsigned int *vrelease) |
| { |
| struct utsname info; |
| char *pmajor, *pminor, *prelease, *tail; |
| |
| if (-1 == uname (&info)) |
| { |
| warning ("Unable to determine GNU/Linux version."); |
| return -1; |
| } |
| |
| pmajor = strtok (info.release, "."); |
| pminor = strtok (NULL, "."); |
| prelease = strtok (NULL, "."); |
| |
| *vmajor = (unsigned int) strtoul (pmajor, &tail, 0); |
| *vminor = (unsigned int) strtoul (pminor, &tail, 0); |
| *vrelease = (unsigned int) strtoul (prelease, &tail, 0); |
| |
| return ((*vmajor << 16) | (*vminor << 8) | *vrelease); |
| } |
| |
| void |
| _initialize_arm_linux_nat (void) |
| { |
| os_version = get_linux_version (&os_major, &os_minor, &os_release); |
| } |