diff options
Diffstat (limited to 'gdb/arm-nbsd-tdep.c')
| -rw-r--r-- | gdb/arm-nbsd-tdep.c | 70 |
1 files changed, 69 insertions, 1 deletions
diff --git a/gdb/arm-nbsd-tdep.c b/gdb/arm-nbsd-tdep.c index 2642024022e..689c4b62197 100644 --- a/gdb/arm-nbsd-tdep.c +++ b/gdb/arm-nbsd-tdep.c @@ -21,7 +21,9 @@ #include "osabi.h" #include "arch/arm.h" +#include "arm-nbsd-tdep.h" #include "arm-tdep.h" +#include "regset.h" #include "solib-svr4.h" /* Description of the longjmp buffer. */ @@ -35,6 +37,70 @@ 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 */ +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) @@ -66,10 +132,12 @@ arm_netbsd_init_abi_common (struct gdbarch_info info, 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) |