/* Functions specific to running GDB native on HPPA running GNU/Linux. Copyright (C) 2004-2014 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 <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 = ptid_get_lwp (inferior_ptid); if (tid == 0) tid = ptid_get_pid (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 = ptid_get_lwp (inferior_ptid); if (tid == 0) tid = ptid_get_pid (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); }