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- /* Functions specific to running GDB native on HPPA running GNU/Linux.
- Copyright (C) 2004-2022 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 "defs.h"
- #include "gdbcore.h"
- #include "regcache.h"
- #include "inferior.h"
- #include "target.h"
- #include "linux-nat.h"
- #include "inf-ptrace.h"
- #include "gdbarch.h"
- #include <sys/procfs.h>
- #include "nat/gdb_ptrace.h"
- #include <linux/version.h>
- #include <asm/ptrace.h>
- #include "hppa-linux-offsets.h"
- #include "hppa-tdep.h"
- class hppa_linux_nat_target final : public linux_nat_target
- {
- public:
- /* Add our register access methods. */
- void fetch_registers (struct regcache *, int) override;
- void store_registers (struct regcache *, int) override;
- };
- static hppa_linux_nat_target the_hppa_linux_nat_target;
- /* 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 = regcache->arch ();
- pid_t tid;
- int val;
- if (gdbarch_cannot_fetch_register (gdbarch, regno))
- {
- regcache->raw_supply (regno, NULL);
- return;
- }
- tid = get_ptrace_pid (regcache->ptid ());
- 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 (regno, &val);
- }
- /* Store one register. */
- static void
- store_register (const struct regcache *regcache, int regno)
- {
- struct gdbarch *gdbarch = regcache->arch ();
- pid_t tid;
- int val;
- if (gdbarch_cannot_store_register (gdbarch, regno))
- return;
- tid = get_ptrace_pid (regcache->ptid ());
- errno = 0;
- regcache->raw_collect (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. */
- void
- hppa_linux_nat_target::fetch_registers (struct regcache *regcache, int regno)
- {
- if (-1 == regno)
- {
- for (regno = 0;
- regno < gdbarch_num_regs (regcache->arch ());
- 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. */
- void
- hppa_linux_nat_target::store_registers (struct regcache *regcache, int regno)
- {
- if (-1 == regno)
- {
- for (regno = 0;
- regno < gdbarch_num_regs (regcache->arch ());
- 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 (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 (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 (2*regi + HPPA_FP0_REGNUM, from);
- regcache->raw_supply (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 (i, to);
- }
- }
- void _initialize_hppa_linux_nat ();
- void
- _initialize_hppa_linux_nat ()
- {
- /* Register the target. */
- linux_target = &the_hppa_linux_nat_target;
- add_inf_child_target (&the_hppa_linux_nat_target);
- }
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