mirror of
https://git.freebsd.org/ports.git
synced 2025-07-11 06:19:19 -04:00
466938cba9
by jhb. Special thanks to jhb for the amazing work on gdb! PR: 207972 Submitted by: luca.pizzamiglio@gmail.com (maintainer)
367 lines
11 KiB
Text
367 lines
11 KiB
Text
diff --git gdb/armfbsd-nat.c gdb/armfbsd-nat.c
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new file mode 100644
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index 0000000..b883411
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--- /dev/null
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+++ gdb/armfbsd-nat.c
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@@ -0,0 +1,215 @@
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+/* Native-dependent code for BSD Unix running on ARM's, for GDB.
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+
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+ Copyright (C) 1988-2015 Free Software Foundation, Inc.
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+
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+ This file is part of GDB.
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+
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+ This program is free software; you can redistribute it and/or modify
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+ it under the terms of the GNU General Public License as published by
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+ the Free Software Foundation; either version 3 of the License, or
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+ (at your option) any later version.
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+
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+ This program is distributed in the hope that it will be useful,
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+ but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+ GNU General Public License for more details.
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+
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+ You should have received a copy of the GNU General Public License
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+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
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+
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+#include "defs.h"
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+#include "gdbcore.h"
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+#include "inferior.h"
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+#include "regcache.h"
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+#include "target.h"
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+#include "gregset.h"
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+#include <sys/types.h>
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+#include <sys/ptrace.h>
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+#include <machine/reg.h>
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+#include <machine/frame.h>
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+
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+#include "fbsd-nat.h"
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+#include "arm-tdep.h"
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+#include "inf-ptrace.h"
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+
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+extern int arm_apcs_32;
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+
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+static pid_t
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+ptrace_pid (ptid_t ptid)
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+{
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+ pid_t pid;
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+
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+#ifdef __FreeBSD__
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+ pid = ptid_get_lwp (ptid);
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+ if (pid == 0)
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+#endif
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+ pid = ptid_get_pid (ptid);
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+ return pid;
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+}
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+
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+static void
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+arm_supply_gregset (struct regcache *regcache, const gregset_t *gregset, int regnum)
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+{
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+ int r;
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+ CORE_ADDR r_pc;
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+
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+ /* Integer registers. */
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+ for (r = ARM_A1_REGNUM; r < ARM_SP_REGNUM; r++)
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+ if ((r == regnum) || (regnum == -1))
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+ regcache_raw_supply (regcache, r, (char *) &gregset->r[r]);
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+
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+ if ((regnum == ARM_SP_REGNUM) || (regnum == -1))
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+ regcache_raw_supply (regcache, ARM_SP_REGNUM,
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+ (char *) &gregset->r_sp);
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+ if ((regnum == ARM_LR_REGNUM) || (regnum == -1))
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+ regcache_raw_supply (regcache, ARM_LR_REGNUM,
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+ (char *) &gregset->r_lr);
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+ /* This is ok: we're running native... */
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+ if ((regnum == ARM_PC_REGNUM) || (regnum == -1))
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+ {
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+ r_pc = gdbarch_addr_bits_remove (get_regcache_arch (regcache), gregset->r_pc);
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+ regcache_raw_supply (regcache, ARM_PC_REGNUM, (char *) &r_pc);
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+ }
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+
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+ if ((regnum == ARM_PS_REGNUM) || (regnum == -1))
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+ {
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+ if (arm_apcs_32)
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+ regcache_raw_supply (regcache, ARM_PS_REGNUM,
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+ (char *) &gregset->r_cpsr);
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+ else
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+ regcache_raw_supply (regcache, ARM_PS_REGNUM,
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+ (char *) &gregset->r_pc);
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+ }
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+}
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+
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+static void
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+armbsd_collect_gregset (const struct regcache *regcache, gregset_t *gregset, int regnum)
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+{
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+ int ret;
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+ int r;
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+
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+ for (r = ARM_A1_REGNUM; r < ARM_SP_REGNUM; r++)
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+ if ((regnum == r) || (regnum == -1))
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+ regcache_raw_collect (regcache, r,
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+ (char *) &gregset->r[r]);
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+
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+ if ((regnum == ARM_SP_REGNUM) || (regnum == -1))
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+ regcache_raw_collect (regcache, ARM_SP_REGNUM,
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+ (char *) &gregset->r_sp);
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+ if ((regnum == ARM_LR_REGNUM) || (regnum == -1))
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+ regcache_raw_collect (regcache, ARM_LR_REGNUM,
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+ (char *) &gregset->r_lr);
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+
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+
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+ if ((regnum == ARM_PC_REGNUM) || (regnum == -1))
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+ regcache_raw_collect (regcache, ARM_PC_REGNUM,
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+ (char *) &gregset->r_pc);
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+ if ((regnum == ARM_PS_REGNUM) || (regnum == -1))
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+ {
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+ if (arm_apcs_32)
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+ {
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+ regcache_raw_collect (regcache, ARM_PS_REGNUM,
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+ (char *) &gregset->r_cpsr);
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+ }
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+ else
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+ {
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+ unsigned psr_val;
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+
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+ regcache_raw_collect (regcache, ARM_PS_REGNUM,
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+ (char *) &psr_val);
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+
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+ psr_val ^= gdbarch_addr_bits_remove (get_regcache_arch (regcache), psr_val);
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+ gregset->r_pc = gdbarch_addr_bits_remove
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+ (get_regcache_arch (regcache), gregset->r_pc);
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+ gregset->r_pc |= psr_val;
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+ }
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+ }
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+}
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+
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+/* Fill GDB's register array with the general-purpose register values
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+ in *GREGSETP. */
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+
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+void
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+supply_gregset (struct regcache *regcache, const gregset_t *gregsetp)
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+{
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+ arm_supply_gregset (regcache, gregsetp, -1);
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+}
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+
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+/* Fill register REGNUM (if it is a general-purpose register) in
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+ *GREGSETPS with the value in GDB's register array. If REGNUM is -1,
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+ do this for all registers. */
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+
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+void
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+fill_gregset (const struct regcache *regcache, gdb_gregset_t *gregsetp, int regnum)
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+{
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+ armbsd_collect_gregset (regcache, gregsetp, regnum);
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+}
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+
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+/* Fill GDB's register array with the floating-point register values
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+ in *FPREGSETP. */
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+
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+void
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+supply_fpregset (struct regcache *regcache, const fpregset_t *fpregsetp)
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+{
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+}
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+
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+/* Fill register REGNUM (if it is a floating-point register) in
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+ *FPREGSETP with the value in GDB's register array. If REGNUM is -1,
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+ do this for all registers. */
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+
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+void
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+fill_fpregset (const struct regcache *regcache, gdb_fpregset_t *fpregsetp, int regnum)
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+{
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+}
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+
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+/* Fetch register REGNO from the child process. If REGNO is -1, do it
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+ for all registers. */
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+
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+static void
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+armfbsd_fetch_inferior_registers (struct target_ops *ops,
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+ struct regcache *regcache, int regno)
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+{
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+ gdb_gregset_t regs;
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+
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+ if (ptrace (PT_GETREGS, ptrace_pid (inferior_ptid),
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+ (PTRACE_TYPE_ARG3) ®s, 0) == -1)
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+ perror_with_name (_("Couldn't get registers"));
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+
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+ arm_supply_gregset (regcache, ®s, regno);
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+ /* TODO: fpregs */
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+}
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+
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+/* Store register REGNO back into the child process. If REGNO is -1,
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+ do this for all registers. */
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+
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+static void
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+armfbsd_store_inferior_registers (struct target_ops *ops,
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+ struct regcache *regcache, int regno)
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+{
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+ gdb_gregset_t regs;
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+
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+ if (ptrace (PT_GETREGS, ptrace_pid (inferior_ptid),
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+ (PTRACE_TYPE_ARG3) ®s, 0) == -1)
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+ perror_with_name (_("Couldn't get registers"));
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+
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+ fill_gregset (regcache, ®s, regno);
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+
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+ if (ptrace (PT_SETREGS, ptrace_pid (inferior_ptid),
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+ (PTRACE_TYPE_ARG3) ®s, 0) == -1)
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+ perror_with_name (_("Couldn't write registers"));
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+ /* TODO: FP regs */
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+}
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+
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+void _initialize_armfbsd_nat (void);
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+
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+void
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+_initialize_armfbsd_nat (void)
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+{
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+ struct target_ops *t;
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+
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+ /* Add in local overrides. */
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+ t = inf_ptrace_target ();
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+ t->to_fetch_registers = armfbsd_fetch_inferior_registers;
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+ t->to_store_registers = armfbsd_store_inferior_registers;
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+ fbsd_nat_add_target (t);
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+}
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diff --git gdb/armfbsd-tdep.c gdb/armfbsd-tdep.c
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new file mode 100644
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index 0000000..f58c323
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--- /dev/null
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+++ gdb/armfbsd-tdep.c
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@@ -0,0 +1,109 @@
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+/* Target-dependent code for PowerPC systems running FreeBSD.
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+
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+ Copyright (C) 2013-2015 Free Software Foundation, Inc.
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+
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+ This file is part of GDB.
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+
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+ This program is free software; you can redistribute it and/or modify
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+ it under the terms of the GNU General Public License as published by
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+ the Free Software Foundation; either version 3 of the License, or
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+ (at your option) any later version.
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+
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+ This program is distributed in the hope that it will be useful,
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+ but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+ GNU General Public License for more details.
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+
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+ You should have received a copy of the GNU General Public License
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+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
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+
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+#include "defs.h"
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+#include "arch-utils.h"
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+#include "frame.h"
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+#include "gdbcore.h"
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+#include "frame-unwind.h"
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+#include "gdbtypes.h"
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+#include "osabi.h"
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+#include "regcache.h"
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+#include "regset.h"
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+#include "symtab.h"
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+#include "target.h"
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+#include "trad-frame.h"
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+
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+#include "arm-tdep.h"
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+#include "solib-svr4.h"
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+
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+/* Description of the longjmp buffer. */
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+#define ARM_FBSD_JB_PC 24
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+#define ARM_FBSD_JB_ELEMENT_SIZE INT_REGISTER_SIZE
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+
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+/* For compatibility with previous implemenations of GDB on arm/FreeBSD,
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+ override the default little-endian breakpoint. */
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+static const gdb_byte arm_fbsd_arm_le_breakpoint[] = {0x11, 0x00, 0x00, 0xe6};
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+static const gdb_byte arm_fbsd_arm_be_breakpoint[] = {0xe6, 0x00, 0x00, 0x11};
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+static const gdb_byte arm_fbsd_thumb_le_breakpoint[] = {0xfe, 0xde};
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+static const gdb_byte arm_fbsd_thumb_be_breakpoint[] = {0xde, 0xfe};
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+
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+static void
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+arm_freebsd_init_abi_common (struct gdbarch_info info,
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+ struct gdbarch *gdbarch)
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+{
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+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
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+
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+ tdep->lowest_pc = 0x8000;
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+ switch (info.byte_order)
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+ {
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+ case BFD_ENDIAN_LITTLE:
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+ tdep->arm_breakpoint = arm_fbsd_arm_le_breakpoint;
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+ tdep->thumb_breakpoint = arm_fbsd_thumb_le_breakpoint;
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+ tdep->arm_breakpoint_size = sizeof (arm_fbsd_arm_le_breakpoint);
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+ tdep->thumb_breakpoint_size = sizeof (arm_fbsd_thumb_le_breakpoint);
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+ break;
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+
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+ case BFD_ENDIAN_BIG:
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+ tdep->arm_breakpoint = arm_fbsd_arm_be_breakpoint;
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+ tdep->thumb_breakpoint = arm_fbsd_thumb_be_breakpoint;
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+ tdep->arm_breakpoint_size = sizeof (arm_fbsd_arm_be_breakpoint);
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+ tdep->thumb_breakpoint_size = sizeof (arm_fbsd_thumb_be_breakpoint);
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+ break;
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+
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+ default:
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+ internal_error (__FILE__, __LINE__,
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+ _("arm_gdbarch_init: bad byte order for float format"));
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+ }
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+
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+ tdep->jb_pc = ARM_FBSD_JB_PC;
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+ tdep->jb_elt_size = ARM_FBSD_JB_ELEMENT_SIZE;
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+
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+ /* Single stepping. */
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+ set_gdbarch_software_single_step (gdbarch, arm_software_single_step);
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+}
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+
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+static void
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+arm_freebsd_elf_init_abi (struct gdbarch_info info,
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+ struct gdbarch *gdbarch)
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+{
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+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
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+
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+ arm_freebsd_init_abi_common (info, gdbarch);
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+ if (tdep->fp_model == ARM_FLOAT_AUTO)
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+ tdep->fp_model = ARM_FLOAT_SOFT_VFP;
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+
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+ /* NetBSD ELF uses SVR4-style shared libraries. */
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+ set_solib_svr4_fetch_link_map_offsets
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+ (gdbarch, svr4_ilp32_fetch_link_map_offsets);
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+}
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+
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+
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+
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+/* Provide a prototype to silence -Wmissing-prototypes. */
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+
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+void _initialize_armfbsd_tdep (void);
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+
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+void
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+_initialize_armfbsd_tdep (void)
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+{
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+
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+ gdbarch_register_osabi (bfd_arch_arm, 0, GDB_OSABI_FREEBSD_ELF,
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+ arm_freebsd_elf_init_abi);
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+}
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diff --git gdb/config/arm/fbsd.mh gdb/config/arm/fbsd.mh
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new file mode 100644
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index 0000000..0a2d8b1
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--- /dev/null
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+++ gdb/config/arm/fbsd.mh
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@@ -0,0 +1,3 @@
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+# Host: FreeBSD/arm
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+NATDEPFILES= armfbsd-nat.o fbsd-nat.o fork-child.o inf-ptrace.o
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+HAVE_NATIVE_GCORE_HOST = 1
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diff --git gdb/Makefile.in gdb/Makefile.in
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index dfaa8a3..ddad28d 100644
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--- gdb/Makefile.in
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+++ gdb/Makefile.in
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@@ -659,7 +659,7 @@
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ALL_TARGET_OBS = \
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armbsd-tdep.o arm.o arm-linux.o arm-linux-tdep.o \
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arm-get-next-pcs.o arm-symbian-tdep.o \
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- armnbsd-tdep.o armobsd-tdep.o \
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+ armnbsd-tdep.o armobsd-tdep.o armfbsd-tdep.o \
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arm-tdep.o arm-wince-tdep.o \
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avr-tdep.o \
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bfin-linux-tdep.o bfin-tdep.o \
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@@ -1666,7 +1666,7 @@
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arm.c arm-get-next-pcs.c \
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arm-linux.c arm-linux-nat.c arm-linux-tdep.c \
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arm-symbian-tdep.c arm-tdep.c \
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- armnbsd-nat.c armbsd-tdep.c armnbsd-tdep.c armobsd-tdep.c \
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+ armnbsd-nat.c armbsd-tdep.c armnbsd-tdep.c armobsd-tdep.c armfbsd-tdep.c \
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avr-tdep.c \
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bfin-linux-tdep.c bfin-tdep.c \
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bsd-uthread.c bsd-kvm.c \
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