$(gdb_assert_h) $(gregset_h) $(x86_64_tdep_h) $(amd64_nat_h)
amd64fbsd-tdep.o: amd64fbsd-tdep.c $(defs_h) $(arch_utils_h) $(frame_h) \
$(gdbcore_h) $(regcache_h) $(osabi_h) $(gdb_string_h) \
- $(x86_64_tdep_h) $(solib_svr4_h)
+ $(x86_64_tdep_h) $(solib_svr4_h)
amd64-nat.o: amd64-nat.c $(defs_h) $(gdbarch_h) $(regcache_h) \
$(gdb_assert_h) $(i386_tdep_h) $(x86_64_tdep_h)
amd64nbsd-nat.o: amd64nbsd-nat.c $(defs_h) $(gdb_assert_h) $(x86_64_tdep_h) \
amd64nbsd-tdep.o: amd64nbsd-tdep.c $(defs_h) $(arch_utils_h) $(frame_h) \
$(gdbcore_h) $(osabi_h) $(gdb_assert_h) $(x86_64_tdep_h) \
$(nbsd_tdep_h) $(solib_svr4_h)
-amd64obsd-nat.o: amd64nbsd-nat.c $(defs_h) $(gdb_assert_h) $(x86_64_tdep_h) \
+amd64obsd-nat.o: amd64obsd-nat.c $(defs_h) $(gdb_assert_h) $(x86_64_tdep_h) \
$(amd64_nat_h)
-amd64obsd-tdep.o: amd64nbsd-tdep.c $(defs_h) $(arch_utils_h) $(frame_h) \
- $(gdbcore_h) $(osabi_h) $(regset_h) $(target_h) $(gdb_assert_h) \
- $(gdb_string_h) $(x86_64_tdep_h) $(i387_tdep_h) $(solib_svr4_h)
+amd64obsd-tdep.o: amd64obsd-tdep.c $(defs_h) $(frame_h) $(gdbcore_h) \
+ $(osabi_h) $(regset_h) $(target_h) $(gdb_assert_h) $(gdb_string_h) \
+ $(x86_64_tdep_h) $(i387_tdep_h) $(solib_svr4_h)
annotate.o: annotate.c $(defs_h) $(annotate_h) $(value_h) $(target_h) \
$(gdbtypes_h) $(breakpoint_h)
arch-utils.o: arch-utils.c $(defs_h) $(arch_utils_h) $(buildsym_h) \
$(osabi_h) $(gdb_string_h) $(frame_h)
hppa-tdep.o: hppa-tdep.c $(defs_h) $(frame_h) $(bfd_h) $(inferior_h) \
$(value_h) $(regcache_h) $(completer_h) $(language_h) $(osabi_h) \
- $(gdb_assert_h) $(infttrace_h) $(symtab_h) $(infcall_h) $(dis_asm_h) \
- $(a_out_encap_h) $(gdb_stat_h) $(gdb_wait_h) $(gdbcore_h) \
- $(gdbcmd_h) $(target_h) $(symfile_h) $(objfiles_h) $(hppa_tdep_h)
+ $(gdb_assert_h) $(infttrace_h) $(arch_utils_h) $(symtab_h) \
+ $(infcall_h) $(dis_asm_h) $(trad_frame_h) $(frame_unwind_h) \
+ $(frame_base_h) $(a_out_encap_h) $(gdb_stat_h) $(gdb_wait_h) \
+ $(gdbcore_h) $(gdbcmd_h) $(target_h) $(symfile_h) $(objfiles_h) \
+ $(hppa_tdep_h)
hpread.o: hpread.c $(defs_h) $(bfd_h) $(gdb_string_h) $(hp_symtab_h) \
$(syms_h) $(symtab_h) $(symfile_h) $(objfiles_h) $(buildsym_h) \
$(complaints_h) $(gdb_stabs_h) $(gdbtypes_h) $(demangle_h) \
#include "symtab.h"
#include "infcall.h"
#include "dis-asm.h"
+#include "trad-frame.h"
+#include "frame-unwind.h"
+#include "frame-base.h"
#ifdef USG
#include <sys/types.h>
hppa_frame_find_saved_regs (frame, deprecated_get_frame_saved_regs (frame));
}
+struct hppa_frame_cache
+{
+ CORE_ADDR base;
+ struct trad_frame_saved_reg *saved_regs;
+};
+
+static struct hppa_frame_cache *
+hppa_frame_cache (struct frame_info *next_frame, void **this_cache)
+{
+ struct hppa_frame_cache *cache;
+ long saved_gr_mask;
+ long saved_fr_mask;
+ CORE_ADDR this_sp;
+ long frame_size;
+ struct unwind_table_entry *u;
+ int i;
+
+ if ((*this_cache) != NULL)
+ return (*this_cache);
+ cache = FRAME_OBSTACK_ZALLOC (struct hppa_frame_cache);
+ (*this_cache) = cache;
+ cache->saved_regs = trad_frame_alloc_saved_regs (next_frame);
+
+ /* Yow! */
+ u = find_unwind_entry (frame_func_unwind (next_frame));
+ if (!u)
+ return;
+
+ /* Turn the Entry_GR field into a bitmask. */
+ saved_gr_mask = 0;
+ for (i = 3; i < u->Entry_GR + 3; i++)
+ {
+ /* Frame pointer gets saved into a special location. */
+ if (u->Save_SP && i == DEPRECATED_FP_REGNUM)
+ continue;
+
+ saved_gr_mask |= (1 << i);
+ }
+
+ /* Turn the Entry_FR field into a bitmask too. */
+ saved_fr_mask = 0;
+ for (i = 12; i < u->Entry_FR + 12; i++)
+ saved_fr_mask |= (1 << i);
+
+ /* Loop until we find everything of interest or hit a branch.
+
+ For unoptimized GCC code and for any HP CC code this will never ever
+ examine any user instructions.
+
+ For optimized GCC code we're faced with problems. GCC will schedule
+ its prologue and make prologue instructions available for delay slot
+ filling. The end result is user code gets mixed in with the prologue
+ and a prologue instruction may be in the delay slot of the first branch
+ or call.
+
+ Some unexpected things are expected with debugging optimized code, so
+ we allow this routine to walk past user instructions in optimized
+ GCC code. */
+ {
+ int final_iteration = 0;
+ CORE_ADDR pc;
+ CORE_ADDR end_pc = skip_prologue_using_sal (pc);
+ int looking_for_sp = u->Save_SP;
+ int looking_for_rp = u->Save_RP;
+ int fp_loc = -1;
+ if (end_pc == 0)
+ end_pc = frame_pc_unwind (next_frame);
+ frame_size = 0;
+ for (pc = frame_func_unwind (next_frame);
+ ((saved_gr_mask || saved_fr_mask
+ || looking_for_sp || looking_for_rp
+ || frame_size < (u->Total_frame_size << 3))
+ && pc <= end_pc);
+ pc += 4)
+ {
+ int reg;
+ char buf4[4];
+ long status = target_read_memory (pc, buf4, sizeof buf4);
+ long inst = extract_unsigned_integer (buf4, sizeof buf4);
+
+ /* Note the interesting effects of this instruction. */
+ frame_size += prologue_inst_adjust_sp (inst);
+
+ /* There are limited ways to store the return pointer into the
+ stack. */
+ if (inst == 0x6bc23fd9) /* stw rp,-0x14(sr0,sp) */
+ {
+ looking_for_rp = 0;
+ cache->saved_regs[RP_REGNUM].addr = -20;
+ }
+ else if (inst == 0x0fc212c1) /* std rp,-0x10(sr0,sp) */
+ {
+ looking_for_rp = 0;
+ cache->saved_regs[RP_REGNUM].addr = -16;
+ }
+
+ /* Check to see if we saved SP into the stack. This also
+ happens to indicate the location of the saved frame
+ pointer. */
+ if ((inst & 0xffffc000) == 0x6fc10000 /* stw,ma r1,N(sr0,sp) */
+ || (inst & 0xffffc00c) == 0x73c10008) /* std,ma r1,N(sr0,sp) */
+ {
+ looking_for_sp = 0;
+ cache->saved_regs[DEPRECATED_FP_REGNUM].addr = 0;
+ }
+
+ /* Account for general and floating-point register saves. */
+ reg = inst_saves_gr (inst);
+ if (reg >= 3 && reg <= 18
+ && (!u->Save_SP || reg != DEPRECATED_FP_REGNUM))
+ {
+ saved_gr_mask &= ~(1 << reg);
+ if ((inst >> 26) == 0x1b && extract_14 (inst) >= 0)
+ /* stwm with a positive displacement is a _post_
+ _modify_. */
+ cache->saved_regs[reg].addr = 0;
+ else if ((inst & 0xfc00000c) == 0x70000008)
+ /* A std has explicit post_modify forms. */
+ cache->saved_regs[reg].addr = 0;
+ else
+ {
+ CORE_ADDR offset;
+
+ if ((inst >> 26) == 0x1c)
+ offset = (inst & 0x1 ? -1 << 13 : 0) | (((inst >> 4) & 0x3ff) << 3);
+ else if ((inst >> 26) == 0x03)
+ offset = low_sign_extend (inst & 0x1f, 5);
+ else
+ offset = extract_14 (inst);
+
+ /* Handle code with and without frame pointers. */
+ if (u->Save_SP)
+ cache->saved_regs[reg].addr = offset;
+ else
+ cache->saved_regs[reg].addr = (u->Total_frame_size << 3) + offset;
+ }
+ }
+
+ /* GCC handles callee saved FP regs a little differently.
+
+ It emits an instruction to put the value of the start of
+ the FP store area into %r1. It then uses fstds,ma with a
+ basereg of %r1 for the stores.
+
+ HP CC emits them at the current stack pointer modifying the
+ stack pointer as it stores each register. */
+
+ /* ldo X(%r3),%r1 or ldo X(%r30),%r1. */
+ if ((inst & 0xffffc000) == 0x34610000
+ || (inst & 0xffffc000) == 0x37c10000)
+ fp_loc = extract_14 (inst);
+
+ reg = inst_saves_fr (inst);
+ if (reg >= 12 && reg <= 21)
+ {
+ /* Note +4 braindamage below is necessary because the FP
+ status registers are internally 8 registers rather than
+ the expected 4 registers. */
+ saved_fr_mask &= ~(1 << reg);
+ if (fp_loc == -1)
+ {
+ /* 1st HP CC FP register store. After this
+ instruction we've set enough state that the GCC and
+ HPCC code are both handled in the same manner. */
+ cache->saved_regs[reg + FP4_REGNUM + 4].addr = 0;
+ fp_loc = 8;
+ }
+ else
+ {
+ cache->saved_regs[reg + FP0_REGNUM + 4].addr = fp_loc;
+ fp_loc += 8;
+ }
+ }
+
+ /* Quit if we hit any kind of branch the previous iteration. */
+ if (final_iteration)
+ break;
+ /* We want to look precisely one instruction beyond the branch
+ if we have not found everything yet. */
+ if (is_branch (inst))
+ final_iteration = 1;
+ }
+ }
+
+ {
+ /* The frame base always represents the value of %sp at entry to
+ the current function (and is thus equivalent to the "saved"
+ stack pointer. */
+ CORE_ADDR this_sp = frame_unwind_register_unsigned (next_frame, SP_REGNUM);
+ /* FIXME: cagney/2004-02-22: This assumes that the frame has been
+ created. If it hasn't everything will be out-of-wack. */
+ if (u->Save_SP && trad_frame_addr_p (cache->saved_regs, SP_REGNUM))
+ /* Both we're expecting the SP to be saved and the SP has been
+ saved. The entry SP value is saved at this frame's SP
+ address. */
+ cache->base = read_memory_integer (this_sp, TARGET_PTR_BIT / 8);
+ else
+ /* The prologue has been slowly allocating stack space. Adjust
+ the SP back. */
+ cache->base = this_sp - frame_size;
+ trad_frame_set_value (cache->saved_regs, SP_REGNUM, cache->base);
+ }
+
+ /* The PC is found in the "return register". */
+ if (u->Millicode)
+ cache->saved_regs[PC_REGNUM] = cache->saved_regs[31];
+ else
+ cache->saved_regs[PC_REGNUM] = cache->saved_regs[RP_REGNUM];
+
+ {
+ /* Convert all the offsets into addresses. */
+ int reg;
+ for (reg = 0; reg < NUM_REGS; reg++)
+ {
+ if (trad_frame_addr_p (cache->saved_regs, reg))
+ cache->saved_regs[reg].addr += cache->base;
+ }
+ }
+
+ return (*this_cache);
+}
+
+static void
+hppa_frame_this_id (struct frame_info *next_frame, void **this_cache,
+ struct frame_id *this_id)
+{
+ struct hppa_frame_cache *info = hppa_frame_cache (next_frame, this_cache);
+ (*this_id) = frame_id_build (info->base, frame_func_unwind (next_frame));
+}
+
+static void
+hppa_frame_prev_register (struct frame_info *next_frame,
+ void **this_cache,
+ int regnum, int *optimizedp,
+ enum lval_type *lvalp, CORE_ADDR *addrp,
+ int *realnump, void *valuep)
+{
+ struct hppa_frame_cache *info = hppa_frame_cache (next_frame, this_cache);
+ trad_frame_prev_register (next_frame, info->saved_regs, regnum,
+ optimizedp, lvalp, addrp, realnump, valuep);
+}
+
+static const struct frame_unwind hppa_frame_unwind =
+{
+ NORMAL_FRAME,
+ hppa_frame_this_id,
+ hppa_frame_prev_register
+};
+
+static const struct frame_unwind *
+hppa_frame_unwind_sniffer (struct frame_info *next_frame)
+{
+ return &hppa_frame_unwind;
+}
+
+static CORE_ADDR
+hppa_frame_base_address (struct frame_info *next_frame,
+ void **this_cache)
+{
+ struct hppa_frame_cache *info = hppa_frame_cache (next_frame,
+ this_cache);
+ return info->base;
+}
+
+static const struct frame_base hppa_frame_base = {
+ &hppa_frame_unwind,
+ hppa_frame_base_address,
+ hppa_frame_base_address,
+ hppa_frame_base_address
+};
+
+static const struct frame_base *
+hppa_frame_base_sniffer (struct frame_info *next_frame)
+{
+ return &hppa_frame_base;
+}
+
+static struct frame_id
+hppa_unwind_dummy_id (struct gdbarch *gdbarch, struct frame_info *next_frame)
+{
+ return frame_id_build (frame_unwind_register_unsigned (next_frame,
+ SP_REGNUM),
+ frame_pc_unwind (next_frame));
+}
+
+static CORE_ADDR
+hppa_unwind_pc (struct gdbarch *gdbarch, struct frame_info *next_frame)
+{
+ return frame_unwind_register_signed (next_frame, PC_REGNUM) & ~3;
+}
+
/* Exception handling support for the HP-UX ANSI C++ compiler.
The compiler (aCC) provides a callback for exception events;
GDB can set a breakpoint on this callback and find out what
/* Frame unwind methods. */
if (0)
{
+ set_gdbarch_unwind_dummy_id (gdbarch, hppa_unwind_dummy_id);
+ set_gdbarch_unwind_pc (gdbarch, hppa_unwind_pc);
+ frame_unwind_append_sniffer (gdbarch, hppa_frame_unwind_sniffer);
+ frame_base_append_sniffer (gdbarch, hppa_frame_base_sniffer);
}
else
{
projects / binutils-gdb.git / commitdiff