gdb/hppa-linux-tdep.c - gdb
Global variables defined
Data types defined
Functions defined
Macros defined
Source code
- #include "defs.h"
- #include "gdbcore.h"
- #include "osabi.h"
- #include "target.h"
- #include "objfiles.h"
- #include "solib-svr4.h"
- #include "glibc-tdep.h"
- #include "frame-unwind.h"
- #include "trad-frame.h"
- #include "dwarf2-frame.h"
- #include "value.h"
- #include "regset.h"
- #include "regcache.h"
- #include "hppa-tdep.h"
- #include "linux-tdep.h"
- #include "elf/common.h"
- static int
- hppa_dwarf_reg_to_regnum (struct gdbarch *gdbarch, int reg)
- {
-
- if (reg <= 32)
- return reg;
-
- if (reg >= 72 && reg <= 72 + 28 * 2)
- return HPPA_FP4_REGNUM + (reg - 72);
- warning (_("Unmapped DWARF DBX Register #%d encountered."), reg);
- return -1;
- }
- static void
- hppa_linux_target_write_pc (struct regcache *regcache, CORE_ADDR v)
- {
-
- regcache_cooked_write_unsigned (regcache, HPPA_PCOQ_HEAD_REGNUM, v | 0x3);
- regcache_cooked_write_unsigned (regcache,
- HPPA_PCOQ_TAIL_REGNUM, (v + 4) | 0x3);
- }
- struct insn_pattern
- {
- unsigned int data;
- unsigned int mask;
- };
- static struct insn_pattern hppa_sigtramp[] = {
-
- { 0x34190000, 0xfffffffd },
-
- { 0x3414015a, 0xffffffff },
-
- { 0xe4008200, 0xffffffff },
-
- { 0x08000240, 0xffffffff },
- { 0, 0 }
- };
- #define HPPA_MAX_INSN_PATTERN_LEN (4)
- static int
- insns_match_pattern (struct gdbarch *gdbarch, CORE_ADDR pc,
- struct insn_pattern *pattern,
- unsigned int *insn)
- {
- enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
- int i;
- CORE_ADDR npc = pc;
- for (i = 0; pattern[i].mask; i++)
- {
- gdb_byte buf[4];
- target_read_memory (npc, buf, 4);
- insn[i] = extract_unsigned_integer (buf, 4, byte_order);
- if ((insn[i] & pattern[i].mask) == pattern[i].data)
- npc += 4;
- else
- return 0;
- }
- return 1;
- }
- static CORE_ADDR
- hppa_linux_sigtramp_find_sigcontext (struct gdbarch *gdbarch, CORE_ADDR pc)
- {
- unsigned int dummy[HPPA_MAX_INSN_PATTERN_LEN];
- int offs = 0;
- int try;
-
- static int pcoffs[] = { 0, 4*4, 5*4 };
-
- static int sfoffs[] = { 4*4, 10*4, 10*4 };
- CORE_ADDR sp;
-
- sp = align_down (pc, 64);
-
- for (try = 0; try < ARRAY_SIZE (pcoffs); try++)
- {
- if (insns_match_pattern (gdbarch, sp + pcoffs[try],
- hppa_sigtramp, dummy))
- {
- offs = sfoffs[try];
- break;
- }
- }
- if (offs == 0)
- {
- if (insns_match_pattern (gdbarch, pc, hppa_sigtramp, dummy))
- {
-
- try = 2;
- sp = pc - pcoffs[try];
- }
- else
- {
- return 0;
- }
- }
-
- return sp + sfoffs[try] + 128 + 24;
- }
- struct hppa_linux_sigtramp_unwind_cache
- {
- CORE_ADDR base;
- struct trad_frame_saved_reg *saved_regs;
- };
- static struct hppa_linux_sigtramp_unwind_cache *
- hppa_linux_sigtramp_frame_unwind_cache (struct frame_info *this_frame,
- void **this_cache)
- {
- struct gdbarch *gdbarch = get_frame_arch (this_frame);
- struct hppa_linux_sigtramp_unwind_cache *info;
- CORE_ADDR pc, scptr;
- int i;
- if (*this_cache)
- return *this_cache;
- info = FRAME_OBSTACK_ZALLOC (struct hppa_linux_sigtramp_unwind_cache);
- *this_cache = info;
- info->saved_regs = trad_frame_alloc_saved_regs (this_frame);
- pc = get_frame_pc (this_frame);
- scptr = hppa_linux_sigtramp_find_sigcontext (gdbarch, pc);
-
-
- scptr += 4;
-
- info->saved_regs[HPPA_IPSW_REGNUM].addr = scptr;
- scptr += 4;
-
- for (i = 1; i < 32; i++)
- {
- info->saved_regs[HPPA_R0_REGNUM + i].addr = scptr;
- scptr += 4;
- }
-
- scptr += 4;
-
- scptr += (8 * 4);
- for (i = 4; i < 32; i++)
- {
- info->saved_regs[HPPA_FP0_REGNUM + (i * 2)].addr = scptr;
- scptr += 4;
- info->saved_regs[HPPA_FP0_REGNUM + (i * 2) + 1].addr = scptr;
- scptr += 4;
- }
-
- info->saved_regs[HPPA_PCSQ_HEAD_REGNUM].addr = scptr;
- scptr += 4;
- info->saved_regs[HPPA_PCSQ_TAIL_REGNUM].addr = scptr;
- scptr += 4;
- info->saved_regs[HPPA_PCOQ_HEAD_REGNUM].addr = scptr;
- scptr += 4;
- info->saved_regs[HPPA_PCOQ_TAIL_REGNUM].addr = scptr;
- scptr += 4;
- info->saved_regs[HPPA_SAR_REGNUM].addr = scptr;
- info->base = get_frame_register_unsigned (this_frame, HPPA_SP_REGNUM);
- return info;
- }
- static void
- hppa_linux_sigtramp_frame_this_id (struct frame_info *this_frame,
- void **this_prologue_cache,
- struct frame_id *this_id)
- {
- struct hppa_linux_sigtramp_unwind_cache *info
- = hppa_linux_sigtramp_frame_unwind_cache (this_frame, this_prologue_cache);
- *this_id = frame_id_build (info->base, get_frame_pc (this_frame));
- }
- static struct value *
- hppa_linux_sigtramp_frame_prev_register (struct frame_info *this_frame,
- void **this_prologue_cache,
- int regnum)
- {
- struct hppa_linux_sigtramp_unwind_cache *info
- = hppa_linux_sigtramp_frame_unwind_cache (this_frame, this_prologue_cache);
- return hppa_frame_prev_register_helper (this_frame,
- info->saved_regs, regnum);
- }
- static int
- hppa_linux_sigtramp_frame_sniffer (const struct frame_unwind *self,
- struct frame_info *this_frame,
- void **this_prologue_cache)
- {
- struct gdbarch *gdbarch = get_frame_arch (this_frame);
- CORE_ADDR pc = get_frame_pc (this_frame);
- if (hppa_linux_sigtramp_find_sigcontext (gdbarch, pc))
- return 1;
- return 0;
- }
- static const struct frame_unwind hppa_linux_sigtramp_frame_unwind = {
- SIGTRAMP_FRAME,
- default_frame_unwind_stop_reason,
- hppa_linux_sigtramp_frame_this_id,
- hppa_linux_sigtramp_frame_prev_register,
- NULL,
- hppa_linux_sigtramp_frame_sniffer
- };
- static CORE_ADDR
- hppa_linux_find_global_pointer (struct gdbarch *gdbarch,
- struct value *function)
- {
- enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
- struct obj_section *faddr_sect;
- CORE_ADDR faddr;
- faddr = value_as_address (function);
-
- if (faddr & 2)
- {
- int status;
- gdb_byte buf[4];
- faddr &= ~3;
- status = target_read_memory (faddr + 4, buf, sizeof (buf));
- if (status == 0)
- return extract_unsigned_integer (buf, sizeof (buf), byte_order);
- }
-
- if (in_plt_section (faddr))
- return 0;
- faddr_sect = find_pc_section (faddr);
- if (faddr_sect != NULL)
- {
- struct obj_section *osect;
- ALL_OBJFILE_OSECTIONS (faddr_sect->objfile, osect)
- {
- if (strcmp (osect->the_bfd_section->name, ".dynamic") == 0)
- break;
- }
- if (osect < faddr_sect->objfile->sections_end)
- {
- CORE_ADDR addr, endaddr;
- addr = obj_section_addr (osect);
- endaddr = obj_section_endaddr (osect);
- while (addr < endaddr)
- {
- int status;
- LONGEST tag;
- gdb_byte buf[4];
- status = target_read_memory (addr, buf, sizeof (buf));
- if (status != 0)
- break;
- tag = extract_signed_integer (buf, sizeof (buf), byte_order);
- if (tag == DT_PLTGOT)
- {
- CORE_ADDR global_pointer;
- status = target_read_memory (addr + 4, buf, sizeof (buf));
- if (status != 0)
- break;
- global_pointer = extract_unsigned_integer (buf, sizeof (buf),
- byte_order);
-
- return global_pointer;
- }
- if (tag == DT_NULL)
- break;
- addr += 8;
- }
- }
- }
- return 0;
- }
- static const struct regcache_map_entry hppa_linux_gregmap[] =
- {
- { 32, HPPA_R0_REGNUM },
- { 1, HPPA_SR4_REGNUM+1 },
- { 1, HPPA_SR4_REGNUM+2 },
- { 1, HPPA_SR4_REGNUM+3 },
- { 1, HPPA_SR4_REGNUM+4 },
- { 1, HPPA_SR4_REGNUM },
- { 1, HPPA_SR4_REGNUM+5 },
- { 1, HPPA_SR4_REGNUM+6 },
- { 1, HPPA_SR4_REGNUM+7 },
- { 1, HPPA_PCOQ_HEAD_REGNUM },
- { 1, HPPA_PCOQ_TAIL_REGNUM },
- { 1, HPPA_PCSQ_HEAD_REGNUM },
- { 1, HPPA_PCSQ_TAIL_REGNUM },
- { 1, HPPA_SAR_REGNUM },
- { 1, HPPA_IIR_REGNUM },
- { 1, HPPA_ISR_REGNUM },
- { 1, HPPA_IOR_REGNUM },
- { 1, HPPA_IPSW_REGNUM },
- { 1, HPPA_RCR_REGNUM },
- { 8, HPPA_TR0_REGNUM },
- { 4, HPPA_PID0_REGNUM },
- { 1, HPPA_CCR_REGNUM },
- { 1, HPPA_EIEM_REGNUM },
- { 0 }
- };
- static const struct regcache_map_entry hppa_linux_fpregmap[] =
- {
- FIXME
- { 64, HPPA_FP0_REGNUM, 4 },
- { 0 }
- };
- static const struct regset hppa_linux_regset =
- {
- hppa_linux_gregmap,
- regcache_supply_regset, regcache_collect_regset
- };
- static const struct regset hppa_linux_fpregset =
- {
- hppa_linux_fpregmap,
- regcache_supply_regset, regcache_collect_regset
- };
- static void
- hppa_linux_iterate_over_regset_sections (struct gdbarch *gdbarch,
- iterate_over_regset_sections_cb *cb,
- void *cb_data,
- const struct regcache *regcache)
- {
- struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
- cb (".reg", 80 * tdep->bytes_per_address, &hppa_linux_regset,
- NULL, cb_data);
- cb (".reg2", 64 * 4, &hppa_linux_fpregset, NULL, cb_data);
- }
- extern initialize_file_ftype _initialize_hppa_linux_tdep;
- static void
- hppa_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
- {
- struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
- linux_init_abi (info, gdbarch);
-
- tdep->is_elf = 1;
- tdep->find_global_pointer = hppa_linux_find_global_pointer;
- set_gdbarch_write_pc (gdbarch, hppa_linux_target_write_pc);
- frame_unwind_append_unwinder (gdbarch, &hppa_linux_sigtramp_frame_unwind);
-
- set_solib_svr4_fetch_link_map_offsets
- (gdbarch, svr4_ilp32_fetch_link_map_offsets);
- tdep->in_solib_call_trampoline = hppa_in_solib_call_trampoline;
- set_gdbarch_skip_trampoline_code (gdbarch, hppa_skip_trampoline_code);
-
- set_gdbarch_skip_solib_resolver (gdbarch, glibc_skip_solib_resolver);
-
- set_gdbarch_long_double_bit (gdbarch, 64);
- set_gdbarch_iterate_over_regset_sections
- (gdbarch, hppa_linux_iterate_over_regset_sections);
- set_gdbarch_dwarf2_reg_to_regnum (gdbarch, hppa_dwarf_reg_to_regnum);
-
- set_gdbarch_fetch_tls_load_module_address (gdbarch,
- svr4_fetch_objfile_link_map);
- }
- void
- _initialize_hppa_linux_tdep (void)
- {
- gdbarch_register_osabi (bfd_arch_hppa, 0, GDB_OSABI_LINUX,
- hppa_linux_init_abi);
- gdbarch_register_osabi (bfd_arch_hppa, bfd_mach_hppa20w,
- GDB_OSABI_LINUX, hppa_linux_init_abi);
- }