--- /dev/null
+/* Functions specific to running gdb native on HPPA running Linux.
+ Copyright 2004 Free Software Foundation, Inc.
+
+ This file is part of GDB.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+#include "defs.h"
+#include "gdbcore.h"
+#include "regcache.h"
+#include "gdb_string.h"
+
+#include <sys/procfs.h>
+#include <string.h>
+#include <asm/offsets.h>
+
+/* Prototypes for supply_gregset etc. */
+#include "gregset.h"
+
+/* These must match the order of the register names.
+
+ Some sort of lookup table is needed because the offsets associated
+ with the registers are all over the board. */
+
+static const int u_offsets[] =
+ {
+ /* general registers */
+ -1,
+ PT_GR1,
+ PT_GR2,
+ PT_GR3,
+ PT_GR4,
+ PT_GR5,
+ PT_GR6,
+ PT_GR7,
+ PT_GR8,
+ PT_GR9,
+ PT_GR10,
+ PT_GR11,
+ PT_GR12,
+ PT_GR13,
+ PT_GR14,
+ PT_GR15,
+ PT_GR16,
+ PT_GR17,
+ PT_GR18,
+ PT_GR19,
+ PT_GR20,
+ PT_GR21,
+ PT_GR22,
+ PT_GR23,
+ PT_GR24,
+ PT_GR25,
+ PT_GR26,
+ PT_GR27,
+ PT_GR28,
+ PT_GR29,
+ PT_GR30,
+ PT_GR31,
+
+ PT_SAR,
+ PT_IAOQ0,
+ PT_IASQ0,
+ PT_IAOQ1,
+ PT_IASQ1,
+ -1, /* eiem */
+ PT_IIR,
+ PT_ISR,
+ PT_IOR,
+ PT_PSW,
+ -1, /* goto */
+
+ PT_SR4,
+ PT_SR0,
+ PT_SR1,
+ PT_SR2,
+ PT_SR3,
+ PT_SR5,
+ PT_SR6,
+ PT_SR7,
+
+ -1, /* cr0 */
+ -1, /* pid0 */
+ -1, /* pid1 */
+ -1, /* ccr */
+ -1, /* pid2 */
+ -1, /* pid3 */
+ -1, /* cr24 */
+ -1, /* cr25 */
+ -1, /* cr26 */
+ PT_CR27,
+ -1, /* cr28 */
+ -1, /* cr29 */
+ -1, /* cr30 */
+
+ /* Floating point regs. */
+ PT_FR0, PT_FR0 + 4,
+ PT_FR1, PT_FR1 + 4,
+ PT_FR2, PT_FR2 + 4,
+ PT_FR3, PT_FR3 + 4,
+ PT_FR4, PT_FR4 + 4,
+ PT_FR5, PT_FR5 + 4,
+ PT_FR6, PT_FR6 + 4,
+ PT_FR7, PT_FR7 + 4,
+ PT_FR8, PT_FR8 + 4,
+ PT_FR9, PT_FR9 + 4,
+ PT_FR10, PT_FR10 + 4,
+ PT_FR11, PT_FR11 + 4,
+ PT_FR12, PT_FR12 + 4,
+ PT_FR13, PT_FR13 + 4,
+ PT_FR14, PT_FR14 + 4,
+ PT_FR15, PT_FR15 + 4,
+ PT_FR16, PT_FR16 + 4,
+ PT_FR17, PT_FR17 + 4,
+ PT_FR18, PT_FR18 + 4,
+ PT_FR19, PT_FR19 + 4,
+ PT_FR20, PT_FR20 + 4,
+ PT_FR21, PT_FR21 + 4,
+ PT_FR22, PT_FR22 + 4,
+ PT_FR23, PT_FR23 + 4,
+ PT_FR24, PT_FR24 + 4,
+ PT_FR25, PT_FR25 + 4,
+ PT_FR26, PT_FR26 + 4,
+ PT_FR27, PT_FR27 + 4,
+ PT_FR28, PT_FR28 + 4,
+ PT_FR29, PT_FR29 + 4,
+ PT_FR30, PT_FR30 + 4,
+ PT_FR31, PT_FR31 + 4,
+ };
+
+CORE_ADDR
+register_addr (int regno, CORE_ADDR blockend)
+{
+ CORE_ADDR addr;
+
+ if ((unsigned) regno >= NUM_REGS)
+ error ("Invalid register number %d.", regno);
+
+ if (u_offsets[regno] == -1)
+ addr = 0;
+ else
+ {
+ addr = (CORE_ADDR) u_offsets[regno];
+ }
+
+ return addr;
+}
+
+/*
+ * Registers saved in a coredump:
+ * gr0..gr31
+ * sr0..sr7
+ * iaoq0..iaoq1
+ * iasq0..iasq1
+ * sar, iir, isr, ior, ipsw
+ * cr0, cr24..cr31
+ * cr8,9,12,13
+ * cr10, cr15
+ */
+#define GR_REGNUM(_n) (R0_REGNUM+_n)
+#define TR_REGNUM(_n) (TR0_REGNUM+_n)
+static const int greg_map[] =
+ {
+ GR_REGNUM(0), GR_REGNUM(1), GR_REGNUM(2), GR_REGNUM(3),
+ GR_REGNUM(4), GR_REGNUM(5), GR_REGNUM(6), GR_REGNUM(7),
+ GR_REGNUM(8), GR_REGNUM(9), GR_REGNUM(10), GR_REGNUM(11),
+ GR_REGNUM(12), GR_REGNUM(13), GR_REGNUM(14), GR_REGNUM(15),
+ GR_REGNUM(16), GR_REGNUM(17), GR_REGNUM(18), GR_REGNUM(19),
+ GR_REGNUM(20), GR_REGNUM(21), GR_REGNUM(22), GR_REGNUM(23),
+ GR_REGNUM(24), GR_REGNUM(25), GR_REGNUM(26), GR_REGNUM(27),
+ GR_REGNUM(28), GR_REGNUM(29), GR_REGNUM(30), GR_REGNUM(31),
+
+ SR4_REGNUM+1, SR4_REGNUM+2, SR4_REGNUM+3, SR4_REGNUM+4,
+ SR4_REGNUM, SR4_REGNUM+5, SR4_REGNUM+6, SR4_REGNUM+7,
+
+ PCOQ_HEAD_REGNUM, PCOQ_TAIL_REGNUM,
+ PCSQ_HEAD_REGNUM, PCSQ_TAIL_REGNUM,
+
+ SAR_REGNUM, IIR_REGNUM, ISR_REGNUM, IOR_REGNUM,
+ IPSW_REGNUM, RCR_REGNUM,
+
+ TR_REGNUM(0), TR_REGNUM(1), TR_REGNUM(2), TR_REGNUM(3),
+ TR_REGNUM(4), TR_REGNUM(5), TR_REGNUM(6), TR_REGNUM(7),
+
+ PID0_REGNUM, PID1_REGNUM, PID2_REGNUM, PID3_REGNUM,
+ CCR_REGNUM, EIEM_REGNUM,
+ };
+
+void
+supply_gregset (gdb_gregset_t *gregsetp)
+{
+ int i;
+ greg_t *regp = (elf_greg_t *) gregsetp;
+
+ for (i = 0; i < sizeof (greg_map) / sizeof (greg_map[0]); i++, regp++)
+ {
+ int regno = greg_map[i];
+ int size = register_size (current_gdbarch, regno);
+ /* When running a 64 bit kernel, a greg_t may be larger than the
+ actual register, so just pick off the LS bits of big-endian word. */
+ supply_register (regno, ((char *) (regp + 1)) - size);
+ }
+}
+
+void
+fill_gregset (gdb_gregset_t *gregsetp, int regno)
+{
+ int i;
+ greg_t *regp = (greg_t *) gregsetp;
+
+ memset (gregsetp, 0, sizeof (*gregsetp));
+ for (i = 0; i < sizeof (greg_map) / sizeof (greg_map[0]); i++, regp++)
+ {
+ int regi = greg_map[i];
+
+ if (regno == -1 || regi == regno)
+ {
+ int rawsize = register_size (current_gdbarch, regi);
+ regcache_collect (regi, ((char *) (regp + 1)) - rawsize);
+ }
+ }
+}
+
+/* Given a pointer to a floating point register set in /proc format
+ (fpregset_t *), unpack the register contents and supply them as gdb's
+ idea of the current floating point register values. */
+
+void
+supply_fpregset (gdb_fpregset_t *fpregsetp)
+{
+ register int regi;
+ char *from;
+
+ for (regi = 0; regi <= 31; regi++)
+ {
+ from = (char *) &((*fpregsetp)[regi]);
+ supply_register (2*regi + HPPA_FP0_REGNUM, from);
+ supply_register (2*regi + HPPA_FP0_REGNUM + 1, from + 4);
+ }
+}
+
+/* Given a pointer to a floating point register set in /proc format
+ (fpregset_t *), update the register specified by REGNO from gdb's idea
+ of the current floating point register set. If REGNO is -1, update
+ them all. */
+
+void
+fill_fpregset (gdb_fpregset_t *fpregsetp, int regno)
+{
+ int i;
+
+ for (i = 0; i < NUM_REGS; i++)
+ {
+ if (regno == -1 || regno == i)
+ {
+ /* Gross. fpregset_t is double, registers[x] has single
+ precision reg. */
+ char *to = (char *) &((*fpregsetp)[(i - HPPA_FP0_REGNUM) / 2]);
+ if ((i - HPPA_FP0_REGNUM) & 1)
+ to += 4;
+ regcache_collect (i, to);
+ }
+ }
+}
--- /dev/null
+/* Target-dependent code for Linux running on PA-RISC, for GDB.
+
+ Copyright 2004 Free Software Foundation, Inc.
+
+This file is part of GDB.
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+
+#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 "hppa-tdep.h"
+
+#if 0
+/* Convert DWARF register number REG to the appropriate register
+ number used by GDB. */
+static int
+hppa_dwarf_reg_to_regnum (int reg)
+{
+ /* registers 0 - 31 are the same in both sets */
+ if (reg < 32)
+ return reg;
+
+ /* dwarf regs 32 to 85 are fpregs 4 - 31 */
+ if (reg >= 32 && reg <= 85)
+ return FP4_REGNUM + (reg - 32);
+
+ warning ("Unmapped DWARF Register #%d encountered\n", reg);
+ return -1;
+}
+#endif
+
+static void
+hppa_linux_target_write_pc (CORE_ADDR v, ptid_t ptid)
+{
+ /* Probably this should be done by the kernel, but it isn't. */
+ write_register_pid (PCOQ_HEAD_REGNUM, v | 0x3, ptid);
+ write_register_pid (PCOQ_TAIL_REGNUM, (v + 4) | 0x3, ptid);
+}
+
+/* An instruction to match. */
+struct insn_pattern
+{
+ unsigned int data; /* See if it matches this.... */
+ unsigned int mask; /* ... with this mask. */
+};
+
+/* See bfd/elf32-hppa.c */
+static struct insn_pattern hppa_long_branch_stub[] = {
+ /* ldil LR'xxx,%r1 */
+ { 0x20200000, 0xffe00000 },
+ /* be,n RR'xxx(%sr4,%r1) */
+ { 0xe0202002, 0xffe02002 },
+ { 0, 0 }
+};
+
+static struct insn_pattern hppa_long_branch_pic_stub[] = {
+ /* b,l .+8, %r1 */
+ { 0xe8200000, 0xffe00000 },
+ /* addil LR'xxx - ($PIC_pcrel$0 - 4), %r1 */
+ { 0x28200000, 0xffe00000 },
+ /* be,n RR'xxxx - ($PIC_pcrel$0 - 8)(%sr4, %r1) */
+ { 0xe0202002, 0xffe02002 },
+ { 0, 0 }
+};
+
+static struct insn_pattern hppa_import_stub[] = {
+ /* addil LR'xxx, %dp */
+ { 0x2b600000, 0xffe00000 },
+ /* ldw RR'xxx(%r1), %r21 */
+ { 0x48350000, 0xffffb000 },
+ /* bv %r0(%r21) */
+ { 0xeaa0c000, 0xffffffff },
+ /* ldw RR'xxx+4(%r1), %r19 */
+ { 0x48330000, 0xffffb000 },
+ { 0, 0 }
+};
+
+static struct insn_pattern hppa_import_pic_stub[] = {
+ /* addil LR'xxx,%r19 */
+ { 0x2a600000, 0xffe00000 },
+ /* ldw RR'xxx(%r1),%r21 */
+ { 0x48350000, 0xffffb000 },
+ /* bv %r0(%r21) */
+ { 0xeaa0c000, 0xffffffff },
+ /* ldw RR'xxx+4(%r1),%r19 */
+ { 0x48330000, 0xffffb000 },
+ { 0, 0 },
+};
+
+static struct insn_pattern hppa_plt_stub[] = {
+ /* b,l 1b, %r20 - 1b is 3 insns before here */
+ { 0xea9f1fdd, 0xffffffff },
+ /* depi 0,31,2,%r20 */
+ { 0xd6801c1e, 0xffffffff },
+ { 0, 0 }
+};
+
+static struct insn_pattern hppa_sigtramp[] = {
+ /* ldi 0, %r25 or ldi 1, %r25 */
+ { 0x34190000, 0xfffffffd },
+ /* ldi __NR_rt_sigreturn, %r20 */
+ { 0x3414015a, 0xffffffff },
+ /* be,l 0x100(%sr2, %r0), %sr0, %r31 */
+ { 0xe4008200, 0xffffffff },
+ /* nop */
+ { 0x08000240, 0xffffffff },
+ { 0, 0 }
+};
+
+#define HPPA_MAX_INSN_PATTERN_LEN (4)
+
+/* Return non-zero if the instructions at PC match the series
+ described in PATTERN, or zero otherwise. PATTERN is an array of
+ 'struct insn_pattern' objects, terminated by an entry whose mask is
+ zero.
+
+ When the match is successful, fill INSN[i] with what PATTERN[i]
+ matched. */
+static int
+insns_match_pattern (CORE_ADDR pc,
+ struct insn_pattern *pattern,
+ unsigned int *insn)
+{
+ int i;
+ CORE_ADDR npc = pc;
+
+ for (i = 0; pattern[i].mask; i++)
+ {
+ insn[i] = read_memory_unsigned_integer (npc, 4);
+ if ((insn[i] & pattern[i].mask) == pattern[i].data)
+ npc += 4;
+ else
+ return 0;
+ }
+ return 1;
+}
+
+static int
+hppa_linux_in_dyncall (CORE_ADDR pc)
+{
+ static CORE_ADDR dyncall = 0;
+
+ /* FIXME: if we switch exec files, dyncall should be reinitialized */
+ if (!dyncall)
+ {
+ struct minimal_symbol *minsym;
+
+ minsym = lookup_minimal_symbol ("$$dyncall", NULL, NULL);
+ if (minsym)
+ dyncall = SYMBOL_VALUE_ADDRESS (minsym);
+ else
+ dyncall = -1;
+ }
+
+ return pc == dyncall;
+}
+
+/* There are several kinds of "trampolines" that we need to deal with:
+ - long branch stubs: these are inserted by the linker when a branch
+ target is too far away for a branch insn to reach
+ - plt stubs: these should go into the .plt section, so are easy to find
+ - import stubs: used to call from object to shared lib or shared lib to
+ shared lib; these go in regular text sections. In fact the linker tries
+ to put them throughout the code because branches have limited reachability.
+ We use the same mechanism as ppc64 to recognize the stub insn patterns.
+ - $$dyncall: similar to hpux, hppa-linux uses $$dyncall for indirect function
+ calls. $$dyncall is exported by libgcc.a */
+static int
+hppa_linux_in_solib_call_trampoline (CORE_ADDR pc, char *name)
+{
+ unsigned int insn[HPPA_MAX_INSN_PATTERN_LEN];
+ int r;
+
+ r = in_plt_section (pc, name)
+ || hppa_linux_in_dyncall (pc)
+ || insns_match_pattern (pc, hppa_import_stub, insn)
+ || insns_match_pattern (pc, hppa_import_pic_stub, insn)
+ || insns_match_pattern (pc, hppa_long_branch_stub, insn)
+ || insns_match_pattern (pc, hppa_long_branch_pic_stub, insn);
+
+ return r;
+}
+
+static CORE_ADDR
+hppa_linux_skip_trampoline_code (CORE_ADDR pc)
+{
+ unsigned int insn[HPPA_MAX_INSN_PATTERN_LEN];
+ int dp_rel, pic_rel;
+
+ /* dyncall handles both PLABELs and direct addresses */
+ if (hppa_linux_in_dyncall (pc))
+ {
+ pc = (CORE_ADDR) read_register (22);
+
+ /* PLABELs have bit 30 set; if it's a PLABEL, then dereference it */
+ if (pc & 0x2)
+ pc = (CORE_ADDR) read_memory_integer (pc & ~0x3, TARGET_PTR_BIT / 8);
+
+ return pc;
+ }
+
+ dp_rel = pic_rel = 0;
+ if ((dp_rel = insns_match_pattern (pc, hppa_import_stub, insn))
+ || (pic_rel = insns_match_pattern (pc, hppa_import_pic_stub, insn)))
+ {
+ /* Extract the target address from the addil/ldw sequence. */
+ pc = hppa_extract_21 (insn[0]) + hppa_extract_14 (insn[1]);
+
+ if (dp_rel)
+ pc += (CORE_ADDR) read_register (27);
+ else
+ pc += (CORE_ADDR) read_register (19);
+
+ /* fallthrough */
+ }
+
+ if (in_plt_section (pc, NULL))
+ {
+ pc = (CORE_ADDR) read_memory_integer (pc, TARGET_PTR_BIT / 8);
+
+ /* if the plt slot has not yet been resolved, the target will
+ be the plt stub */
+ if (in_plt_section (pc, NULL))
+ {
+ /* Sanity check: are we pointing to the plt stub? */
+ if (insns_match_pattern (pc, hppa_plt_stub, insn))
+ {
+ /* this should point to the fixup routine */
+ pc = (CORE_ADDR) read_memory_integer (pc + 8, TARGET_PTR_BIT / 8);
+ }
+ else
+ {
+ error ("Cannot resolve plt stub at 0x%s\n",
+ paddr_nz (pc));
+ pc = 0;
+ }
+ }
+ }
+
+ return pc;
+}
+
+/* Signal frames. */
+
+/* (This is derived from MD_FALLBACK_FRAME_STATE_FOR in gcc.)
+
+ Unfortunately, because of various bugs and changes to the kernel,
+ we have several cases to deal with.
+
+ In 2.4, the signal trampoline is 4 bytes, and pc should point directly at
+ the beginning of the trampoline and struct rt_sigframe.
+
+ In <= 2.6.5-rc2-pa3, the signal trampoline is 9 bytes, and pc points at
+ the 4th word in the trampoline structure. This is wrong, it should point
+ at the 5th word. This is fixed in 2.6.5-rc2-pa4.
+
+ To detect these cases, we first take pc, align it to 64-bytes
+ to get the beginning of the signal frame, and then check offsets 0, 4
+ and 5 to see if we found the beginning of the trampoline. This will
+ tell us how to locate the sigcontext structure.
+
+ Note that with a 2.4 64-bit kernel, the signal context is not properly
+ passed back to userspace so the unwind will not work correctly. */
+static CORE_ADDR
+hppa_linux_sigtramp_find_sigcontext (CORE_ADDR sp)
+{
+ unsigned int dummy[HPPA_MAX_INSN_PATTERN_LEN];
+ int offs = 0;
+ int try;
+ /* offsets to try to find the trampoline */
+ static int pcoffs[] = { 0, 4*4, 5*4 };
+ /* offsets to the rt_sigframe structure */
+ static int sfoffs[] = { 4*4, 10*4, 10*4 };
+
+ /* rt_sigreturn trampoline:
+ 3419000x ldi 0, %r25 or ldi 1, %r25 (x = 0 or 2)
+ 3414015a ldi __NR_rt_sigreturn, %r20
+ e4008200 be,l 0x100(%sr2, %r0), %sr0, %r31
+ 08000240 nop */
+
+ for (try = 0; try < ARRAY_SIZE (pcoffs); try++)
+ {
+ if (insns_match_pattern (sp + pcoffs[try], hppa_sigtramp, dummy))
+ {
+ offs = sfoffs[try];
+ break;
+ }
+ }
+
+ if (offs == 0)
+ return 0;
+
+ /* sp + sfoffs[try] points to a struct rt_sigframe, which contains
+ a struct siginfo and a struct ucontext. struct ucontext contains
+ a struct sigcontext. Return an offset to this sigcontext here. Too
+ bad we cannot include system specific headers :-(.
+ sizeof(struct siginfo) == 128
+ offsetof(struct ucontext, uc_mcontext) == 24. */
+ 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 *next_frame,
+ void **this_cache)
+{
+ struct gdbarch *gdbarch = get_frame_arch (next_frame);
+ struct hppa_linux_sigtramp_unwind_cache *info;
+ CORE_ADDR sp, 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 (next_frame);
+
+ pc = frame_pc_unwind (next_frame);
+ sp = (pc & ~63);
+ scptr = hppa_linux_sigtramp_find_sigcontext (sp);
+
+ /* structure of struct sigcontext:
+
+ struct sigcontext {
+ unsigned long sc_flags;
+ unsigned long sc_gr[32];
+ unsigned long long sc_fr[32];
+ unsigned long sc_iasq[2];
+ unsigned long sc_iaoq[2];
+ unsigned long sc_sar; */
+
+ /* Skip sc_flags. */
+ scptr += 4;
+
+ /* GR[0] is the psw, we don't restore that. */
+ scptr += 4;
+
+ /* General registers. */
+ for (i = 1; i < 32; i++)
+ {
+ info->saved_regs[R0_REGNUM + i].addr = scptr;
+ scptr += 4;
+ }
+
+ /* Pad. */
+ scptr += 4;
+
+ /* FP regs; FP0-3 are not restored. */
+ 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;
+ }
+
+ /* IASQ/IAOQ. */
+ info->saved_regs[PCSQ_HEAD_REGNUM].addr = scptr;
+ scptr += 4;
+ info->saved_regs[PCSQ_TAIL_REGNUM].addr = scptr;
+ scptr += 4;
+
+ info->saved_regs[PCOQ_HEAD_REGNUM].addr = scptr;
+ scptr += 4;
+ info->saved_regs[PCOQ_TAIL_REGNUM].addr = scptr;
+ scptr += 4;
+
+ info->base = read_memory_unsigned_integer (
+ info->saved_regs[HPPA_SP_REGNUM].addr, 4);
+
+ return info;
+}
+
+static void
+hppa_linux_sigtramp_frame_this_id (struct frame_info *next_frame,
+ void **this_prologue_cache,
+ struct frame_id *this_id)
+{
+ struct hppa_linux_sigtramp_unwind_cache *info
+ = hppa_linux_sigtramp_frame_unwind_cache (next_frame, this_prologue_cache);
+ *this_id = frame_id_build (info->base, frame_pc_unwind (next_frame));
+}
+
+static void
+hppa_linux_sigtramp_frame_prev_register (struct frame_info *next_frame,
+ void **this_prologue_cache,
+ int regnum, int *optimizedp,
+ enum lval_type *lvalp,
+ CORE_ADDR *addrp,
+ int *realnump, void *bufferp)
+{
+ struct hppa_linux_sigtramp_unwind_cache *info
+ = hppa_linux_sigtramp_frame_unwind_cache (next_frame, this_prologue_cache);
+ int pcoqt = (regnum == PCOQ_TAIL_REGNUM);
+
+ if (pcoqt)
+ regnum = PCOQ_HEAD_REGNUM;
+
+ trad_frame_prev_register (next_frame, info->saved_regs, regnum,
+ optimizedp, lvalp, addrp, realnump, bufferp);
+
+ if (pcoqt)
+ store_unsigned_integer (bufferp, 4,
+ extract_unsigned_integer (bufferp, 4) + 4);
+}
+
+static const struct frame_unwind hppa_linux_sigtramp_frame_unwind = {
+ SIGTRAMP_FRAME,
+ hppa_linux_sigtramp_frame_this_id,
+ hppa_linux_sigtramp_frame_prev_register
+};
+
+/* hppa-linux always uses "new-style" rt-signals. The signal handler's return
+ address should point to a signal trampoline on the stack. The signal
+ trampoline is embedded in a rt_sigframe structure that is aligned on
+ the stack. We take advantage of the fact that sp must be 64-byte aligned,
+ and the trampoline is small, so by rounding down the trampoline address
+ we can find the beginning of the struct rt_sigframe. */
+static const struct frame_unwind *
+hppa_linux_sigtramp_unwind_sniffer (struct frame_info *next_frame)
+{
+ CORE_ADDR pc = frame_pc_unwind (next_frame);
+ CORE_ADDR sp = (pc & ~63);
+
+ if (hppa_linux_sigtramp_find_sigcontext (sp))
+ return &hppa_linux_sigtramp_frame_unwind;
+
+ return NULL;
+}
+
+/* Forward declarations. */
+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 is always ELF. */
+ tdep->is_elf = 1;
+
+ set_gdbarch_write_pc (gdbarch, hppa_linux_target_write_pc);
+
+ frame_unwind_append_sniffer (gdbarch, hppa_linux_sigtramp_unwind_sniffer);
+
+ /* GNU/Linux uses SVR4-style shared libraries. */
+ set_solib_svr4_fetch_link_map_offsets
+ (gdbarch, svr4_ilp32_fetch_link_map_offsets);
+
+ set_gdbarch_in_solib_call_trampoline
+ (gdbarch, hppa_linux_in_solib_call_trampoline);
+ set_gdbarch_skip_trampoline_code
+ (gdbarch, hppa_linux_skip_trampoline_code);
+
+ /* GNU/Linux uses the dynamic linker included in the GNU C Library. */
+ set_gdbarch_skip_solib_resolver (gdbarch, glibc_skip_solib_resolver);
+
+#if 0
+ /* Dwarf-2 unwinding support. Not yet working. */
+ set_gdbarch_dwarf_reg_to_regnum (gdbarch, hppa_dwarf_reg_to_regnum);
+ set_gdbarch_dwarf2_reg_to_regnum (gdbarch, hppa_dwarf_reg_to_regnum);
+ frame_unwind_append_sniffer (gdbarch, dwarf2_frame_sniffer);
+ frame_base_append_sniffer (gdbarch, dwarf2_frame_base_sniffer);
+#endif
+}
+
+void
+_initialize_hppa_linux_tdep (void)
+{
+ gdbarch_register_osabi (bfd_arch_hppa, 0, GDB_OSABI_LINUX, hppa_linux_init_abi);
+}
projects / binutils-gdb.git / commitdiff