+/* 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. */
+}
+