/* Target-dependent code for NetBSD/arm.
- Copyright (C) 2002-2018 Free Software Foundation, Inc.
+ Copyright (C) 2002-2020 Free Software Foundation, Inc.
This file is part of GDB.
#include "osabi.h"
#include "arch/arm.h"
+#include "arm-nbsd-tdep.h"
+#include "nbsd-tdep.h"
#include "arm-tdep.h"
+#include "regset.h"
#include "solib-svr4.h"
/* Description of the longjmp buffer. */
#define ARM_NBSD_JB_PC 24
-#define ARM_NBSD_JB_ELEMENT_SIZE INT_REGISTER_SIZE
+#define ARM_NBSD_JB_ELEMENT_SIZE ARM_INT_REGISTER_SIZE
-/* For compatibility with previous implemenations of GDB on arm/NetBSD,
+/* For compatibility with previous implementations of GDB on arm/NetBSD,
override the default little-endian breakpoint. */
static const gdb_byte arm_nbsd_arm_le_breakpoint[] = {0x11, 0x00, 0x00, 0xe6};
static const gdb_byte arm_nbsd_arm_be_breakpoint[] = {0xe6, 0x00, 0x00, 0x11};
static const gdb_byte arm_nbsd_thumb_le_breakpoint[] = {0xfe, 0xde};
static const gdb_byte arm_nbsd_thumb_be_breakpoint[] = {0xde, 0xfe};
+/* This matches struct reg from NetBSD's sys/arch/arm/include/reg.h:
+ https://github.com/NetBSD/src/blob/7c13e6e6773bb171f4ed3ed53013e9d24b3c1eac/sys/arch/arm/include/reg.h#L39
+ */
+struct arm_nbsd_reg
+{
+ uint32_t reg[13];
+ uint32_t sp;
+ uint32_t lr;
+ uint32_t pc;
+ uint32_t cpsr;
+};
+
+void
+arm_nbsd_supply_gregset (const struct regset *regset, struct regcache *regcache,
+ int regnum, const void *gregs, size_t len)
+{
+ const arm_nbsd_reg *gregset = static_cast<const arm_nbsd_reg *>(gregs);
+ gdb_assert (len >= sizeof (arm_nbsd_reg));
+
+ /* Integer registers. */
+ for (int i = ARM_A1_REGNUM; i < ARM_SP_REGNUM; i++)
+ if (regnum == -1 || regnum == i)
+ regcache->raw_supply (i, (char *) &gregset->reg[i]);
+
+ if (regnum == -1 || regnum == ARM_SP_REGNUM)
+ regcache->raw_supply (ARM_SP_REGNUM, (char *) &gregset->sp);
+
+ if (regnum == -1 || regnum == ARM_LR_REGNUM)
+ regcache->raw_supply (ARM_LR_REGNUM, (char *) &gregset->lr);
+
+ if (regnum == -1 || regnum == ARM_PC_REGNUM)
+ {
+ CORE_ADDR r_pc = gdbarch_addr_bits_remove (regcache->arch (), gregset->pc);
+ regcache->raw_supply (ARM_PC_REGNUM, (char *) &r_pc);
+ }
+
+ if (regnum == -1 || regnum == ARM_PS_REGNUM)
+ {
+ if (arm_apcs_32)
+ regcache->raw_supply (ARM_PS_REGNUM, (char *) &gregset->cpsr);
+ else
+ regcache->raw_supply (ARM_PS_REGNUM, (char *) &gregset->pc);
+ }
+}
+
+static const struct regset arm_nbsd_regset = {
+ nullptr,
+ arm_nbsd_supply_gregset,
+ /* We don't need a collect function because we only use this reading registers
+ (via iterate_over_regset_sections and fetch_regs/fetch_register). */
+ nullptr,
+ 0
+};
+
+static void
+arm_nbsd_iterate_over_regset_sections (struct gdbarch *gdbarch,
+ iterate_over_regset_sections_cb *cb,
+ void *cb_data,
+ const struct regcache *regcache)
+{
+ cb (".reg", sizeof (arm_nbsd_reg), sizeof (arm_nbsd_reg), &arm_nbsd_regset,
+ NULL, cb_data);
+ /* cbiesinger/2020-02-12 -- as far as I can tell, ARM/NetBSD does
+ not write any floating point registers into the core file (tested
+ with NetBSD 9.1_RC1). When it does, this function will need to read them,
+ and the arm-netbsd gdbarch will need a core_read_description function
+ to return the right description for them. */
+}
+
static void
arm_netbsd_init_abi_common (struct gdbarch_info info,
struct gdbarch *gdbarch)
tdep->jb_pc = ARM_NBSD_JB_PC;
tdep->jb_elt_size = ARM_NBSD_JB_ELEMENT_SIZE;
+ set_gdbarch_iterate_over_regset_sections
+ (gdbarch, arm_nbsd_iterate_over_regset_sections);
/* Single stepping. */
set_gdbarch_software_single_step (gdbarch, arm_software_single_step);
}
-
+
static void
arm_netbsd_elf_init_abi (struct gdbarch_info info,
struct gdbarch *gdbarch)
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
arm_netbsd_init_abi_common (info, gdbarch);
+
+ nbsd_init_abi (info, gdbarch);
+
if (tdep->fp_model == ARM_FLOAT_AUTO)
tdep->fp_model = ARM_FLOAT_SOFT_VFP;
(gdbarch, svr4_ilp32_fetch_link_map_offsets);
}
+void _initialize_arm_netbsd_tdep ();
void
-_initialize_arm_netbsd_tdep (void)
+_initialize_arm_netbsd_tdep ()
{
gdbarch_register_osabi (bfd_arch_arm, 0, GDB_OSABI_NETBSD,
arm_netbsd_elf_init_abi);