| /* Functions specific to running GDB native on HPPA running GNU/Linux. |
| |
| Copyright (C) 2004-2012 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 "defs.h" |
| #include "gdbcore.h" |
| #include "regcache.h" |
| #include "gdb_string.h" |
| #include "inferior.h" |
| #include "target.h" |
| #include "linux-nat.h" |
| |
| #include <sys/procfs.h> |
| #include <sys/ptrace.h> |
| #include <linux/version.h> |
| |
| #include <asm/ptrace.h> |
| #include "hppa-linux-offsets.h" |
| |
| #include "hppa-tdep.h" |
| |
| /* Prototypes for supply_gregset etc. */ |
| #include "gregset.h" |
| |
| /* These must match the order of the register names. |
| |
| Some sort of lookup table is needed because the offsets associated |
| with the registers are all over the board. */ |
| |
| static const int u_offsets[] = |
| { |
| /* general registers */ |
| -1, |
| PT_GR1, |
| PT_GR2, |
| PT_GR3, |
| PT_GR4, |
| PT_GR5, |
| PT_GR6, |
| PT_GR7, |
| PT_GR8, |
| PT_GR9, |
| PT_GR10, |
| PT_GR11, |
| PT_GR12, |
| PT_GR13, |
| PT_GR14, |
| PT_GR15, |
| PT_GR16, |
| PT_GR17, |
| PT_GR18, |
| PT_GR19, |
| PT_GR20, |
| PT_GR21, |
| PT_GR22, |
| PT_GR23, |
| PT_GR24, |
| PT_GR25, |
| PT_GR26, |
| PT_GR27, |
| PT_GR28, |
| PT_GR29, |
| PT_GR30, |
| PT_GR31, |
| |
| PT_SAR, |
| PT_IAOQ0, |
| PT_IASQ0, |
| PT_IAOQ1, |
| PT_IASQ1, |
| -1, /* eiem */ |
| PT_IIR, |
| PT_ISR, |
| PT_IOR, |
| PT_PSW, |
| -1, /* goto */ |
| |
| PT_SR4, |
| PT_SR0, |
| PT_SR1, |
| PT_SR2, |
| PT_SR3, |
| PT_SR5, |
| PT_SR6, |
| PT_SR7, |
| |
| -1, /* cr0 */ |
| -1, /* pid0 */ |
| -1, /* pid1 */ |
| -1, /* ccr */ |
| -1, /* pid2 */ |
| -1, /* pid3 */ |
| -1, /* cr24 */ |
| -1, /* cr25 */ |
| -1, /* cr26 */ |
| PT_CR27, |
| -1, /* cr28 */ |
| -1, /* cr29 */ |
| -1, /* cr30 */ |
| |
| /* Floating point regs. */ |
| PT_FR0, PT_FR0 + 4, |
| PT_FR1, PT_FR1 + 4, |
| PT_FR2, PT_FR2 + 4, |
| PT_FR3, PT_FR3 + 4, |
| PT_FR4, PT_FR4 + 4, |
| PT_FR5, PT_FR5 + 4, |
| PT_FR6, PT_FR6 + 4, |
| PT_FR7, PT_FR7 + 4, |
| PT_FR8, PT_FR8 + 4, |
| PT_FR9, PT_FR9 + 4, |
| PT_FR10, PT_FR10 + 4, |
| PT_FR11, PT_FR11 + 4, |
| PT_FR12, PT_FR12 + 4, |
| PT_FR13, PT_FR13 + 4, |
| PT_FR14, PT_FR14 + 4, |
| PT_FR15, PT_FR15 + 4, |
| PT_FR16, PT_FR16 + 4, |
| PT_FR17, PT_FR17 + 4, |
| PT_FR18, PT_FR18 + 4, |
| PT_FR19, PT_FR19 + 4, |
| PT_FR20, PT_FR20 + 4, |
| PT_FR21, PT_FR21 + 4, |
| PT_FR22, PT_FR22 + 4, |
| PT_FR23, PT_FR23 + 4, |
| PT_FR24, PT_FR24 + 4, |
| PT_FR25, PT_FR25 + 4, |
| PT_FR26, PT_FR26 + 4, |
| PT_FR27, PT_FR27 + 4, |
| PT_FR28, PT_FR28 + 4, |
| PT_FR29, PT_FR29 + 4, |
| PT_FR30, PT_FR30 + 4, |
| PT_FR31, PT_FR31 + 4, |
| }; |
| |
| static CORE_ADDR |
| hppa_linux_register_addr (int regno, CORE_ADDR blockend) |
| { |
| CORE_ADDR addr; |
| |
| if ((unsigned) regno >= ARRAY_SIZE (u_offsets)) |
| error (_("Invalid register number %d."), regno); |
| |
| if (u_offsets[regno] == -1) |
| addr = 0; |
| else |
| { |
| addr = (CORE_ADDR) u_offsets[regno]; |
| } |
| |
| return addr; |
| } |
| |
| /* |
| * Registers saved in a coredump: |
| * gr0..gr31 |
| * sr0..sr7 |
| * iaoq0..iaoq1 |
| * iasq0..iasq1 |
| * sar, iir, isr, ior, ipsw |
| * cr0, cr24..cr31 |
| * cr8,9,12,13 |
| * cr10, cr15 |
| */ |
| #define GR_REGNUM(_n) (HPPA_R0_REGNUM+_n) |
| #define TR_REGNUM(_n) (HPPA_TR0_REGNUM+_n) |
| static const int greg_map[] = |
| { |
| GR_REGNUM(0), GR_REGNUM(1), GR_REGNUM(2), GR_REGNUM(3), |
| GR_REGNUM(4), GR_REGNUM(5), GR_REGNUM(6), GR_REGNUM(7), |
| GR_REGNUM(8), GR_REGNUM(9), GR_REGNUM(10), GR_REGNUM(11), |
| GR_REGNUM(12), GR_REGNUM(13), GR_REGNUM(14), GR_REGNUM(15), |
| GR_REGNUM(16), GR_REGNUM(17), GR_REGNUM(18), GR_REGNUM(19), |
| GR_REGNUM(20), GR_REGNUM(21), GR_REGNUM(22), GR_REGNUM(23), |
| GR_REGNUM(24), GR_REGNUM(25), GR_REGNUM(26), GR_REGNUM(27), |
| GR_REGNUM(28), GR_REGNUM(29), GR_REGNUM(30), GR_REGNUM(31), |
| |
| HPPA_SR4_REGNUM+1, HPPA_SR4_REGNUM+2, HPPA_SR4_REGNUM+3, HPPA_SR4_REGNUM+4, |
| HPPA_SR4_REGNUM, HPPA_SR4_REGNUM+5, HPPA_SR4_REGNUM+6, HPPA_SR4_REGNUM+7, |
| |
| HPPA_PCOQ_HEAD_REGNUM, HPPA_PCOQ_TAIL_REGNUM, |
| HPPA_PCSQ_HEAD_REGNUM, HPPA_PCSQ_TAIL_REGNUM, |
| |
| HPPA_SAR_REGNUM, HPPA_IIR_REGNUM, HPPA_ISR_REGNUM, HPPA_IOR_REGNUM, |
| HPPA_IPSW_REGNUM, HPPA_RCR_REGNUM, |
| |
| TR_REGNUM(0), TR_REGNUM(1), TR_REGNUM(2), TR_REGNUM(3), |
| TR_REGNUM(4), TR_REGNUM(5), TR_REGNUM(6), TR_REGNUM(7), |
| |
| HPPA_PID0_REGNUM, HPPA_PID1_REGNUM, HPPA_PID2_REGNUM, HPPA_PID3_REGNUM, |
| HPPA_CCR_REGNUM, HPPA_EIEM_REGNUM, |
| }; |
| |
| |
| |
| /* Fetch one register. */ |
| |
| static void |
| fetch_register (struct regcache *regcache, int regno) |
| { |
| struct gdbarch *gdbarch = get_regcache_arch (regcache); |
| int tid; |
| int val; |
| |
| if (gdbarch_cannot_fetch_register (gdbarch, regno)) |
| { |
| regcache_raw_supply (regcache, regno, NULL); |
| return; |
| } |
| |
| /* GNU/Linux LWP ID's are process ID's. */ |
| tid = TIDGET (inferior_ptid); |
| if (tid == 0) |
| tid = PIDGET (inferior_ptid); /* Not a threaded program. */ |
| |
| errno = 0; |
| val = ptrace (PTRACE_PEEKUSER, tid, hppa_linux_register_addr (regno, 0), 0); |
| if (errno != 0) |
| error (_("Couldn't read register %s (#%d): %s."), |
| gdbarch_register_name (gdbarch, regno), |
| regno, safe_strerror (errno)); |
| |
| regcache_raw_supply (regcache, regno, &val); |
| } |
| |
| /* Store one register. */ |
| |
| static void |
| store_register (const struct regcache *regcache, int regno) |
| { |
| struct gdbarch *gdbarch = get_regcache_arch (regcache); |
| int tid; |
| int val; |
| |
| if (gdbarch_cannot_store_register (gdbarch, regno)) |
| return; |
| |
| /* GNU/Linux LWP ID's are process ID's. */ |
| tid = TIDGET (inferior_ptid); |
| if (tid == 0) |
| tid = PIDGET (inferior_ptid); /* Not a threaded program. */ |
| |
| errno = 0; |
| regcache_raw_collect (regcache, regno, &val); |
| ptrace (PTRACE_POKEUSER, tid, hppa_linux_register_addr (regno, 0), val); |
| if (errno != 0) |
| error (_("Couldn't write register %s (#%d): %s."), |
| gdbarch_register_name (gdbarch, regno), |
| regno, safe_strerror (errno)); |
| } |
| |
| /* 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. */ |
| |
| static void |
| hppa_linux_fetch_inferior_registers (struct target_ops *ops, |
| struct regcache *regcache, int regno) |
| { |
| if (-1 == regno) |
| { |
| for (regno = 0; |
| regno < gdbarch_num_regs (get_regcache_arch (regcache)); |
| regno++) |
| fetch_register (regcache, regno); |
| } |
| else |
| { |
| fetch_register (regcache, 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. */ |
| |
| static void |
| hppa_linux_store_inferior_registers (struct target_ops *ops, |
| struct regcache *regcache, int regno) |
| { |
| if (-1 == regno) |
| { |
| for (regno = 0; |
| regno < gdbarch_num_regs (get_regcache_arch (regcache)); |
| regno++) |
| store_register (regcache, regno); |
| } |
| else |
| { |
| store_register (regcache, regno); |
| } |
| } |
| |
| /* Fill GDB's register array with the general-purpose register values |
| in *gregsetp. */ |
| |
| void |
| supply_gregset (struct regcache *regcache, const gdb_gregset_t *gregsetp) |
| { |
| int i; |
| const greg_t *regp = (const elf_greg_t *) gregsetp; |
| |
| for (i = 0; i < sizeof (greg_map) / sizeof (greg_map[0]); i++, regp++) |
| { |
| int regno = greg_map[i]; |
| regcache_raw_supply (regcache, regno, regp); |
| } |
| } |
| |
| /* 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 (const struct regcache *regcache, |
| gdb_gregset_t *gregsetp, int regno) |
| { |
| int i; |
| |
| for (i = 0; i < sizeof (greg_map) / sizeof (greg_map[0]); i++) |
| { |
| int mregno = greg_map[i]; |
| |
| if (regno == -1 || regno == mregno) |
| { |
| regcache_raw_collect(regcache, mregno, &(*gregsetp)[i]); |
| } |
| } |
| } |
| |
| /* Given a pointer to a floating point register set in /proc format |
| (fpregset_t *), unpack the register contents and supply them as gdb's |
| idea of the current floating point register values. */ |
| |
| void |
| supply_fpregset (struct regcache *regcache, const gdb_fpregset_t *fpregsetp) |
| { |
| int regi; |
| const char *from; |
| |
| for (regi = 0; regi <= 31; regi++) |
| { |
| from = (const char *) &((*fpregsetp)[regi]); |
| regcache_raw_supply (regcache, 2*regi + HPPA_FP0_REGNUM, from); |
| regcache_raw_supply (regcache, 2*regi + HPPA_FP0_REGNUM + 1, from + 4); |
| } |
| } |
| |
| /* Given a pointer to a floating point register set in /proc format |
| (fpregset_t *), update the register specified by REGNO from gdb's idea |
| of the current floating point register set. If REGNO is -1, update |
| them all. */ |
| |
| void |
| fill_fpregset (const struct regcache *regcache, |
| gdb_fpregset_t *fpregsetp, int regno) |
| { |
| int i; |
| |
| for (i = HPPA_FP0_REGNUM; i < HPPA_FP0_REGNUM + 32 * 2; i++) |
| { |
| /* Gross. fpregset_t is double, registers[x] has single |
| precision reg. */ |
| char *to = (char *) &((*fpregsetp)[(i - HPPA_FP0_REGNUM) / 2]); |
| if ((i - HPPA_FP0_REGNUM) & 1) |
| to += 4; |
| regcache_raw_collect (regcache, i, to); |
| } |
| } |
| |
| void _initialize_hppa_linux_nat (void); |
| |
| void |
| _initialize_hppa_linux_nat (void) |
| { |
| struct target_ops *t; |
| |
| /* Fill in the generic GNU/Linux methods. */ |
| t = linux_target (); |
| |
| /* Add our register access methods. */ |
| t->to_fetch_registers = hppa_linux_fetch_inferior_registers; |
| t->to_store_registers = hppa_linux_store_inferior_registers; |
| |
| /* Register the target. */ |
| linux_nat_add_target (t); |
| } |