binutils-gdb/gdb/hppa-tdep.c

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/* Machine-dependent code which would otherwise be in inflow.c and core.c,
for GDB, the GNU debugger. This code is for the HP PA-RISC cpu.
Copyright 1986, 1987, 1989, 1990, 1991, 1992, 1993 Free Software Foundation, Inc.
Contributed by the Center for Software Science at the
University of Utah (pa-gdb-bugs@cs.utah.edu).
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., 675 Mass Ave, Cambridge, MA 02139, USA. */
#include "defs.h"
#include "frame.h"
#include "inferior.h"
#include "value.h"
/* For argument passing to the inferior */
#include "symtab.h"
#ifdef USG
#include <sys/types.h>
#endif
#include <sys/param.h>
#include <sys/dir.h>
#include <signal.h>
#include <sys/ioctl.h>
#ifdef COFF_ENCAPSULATE
#include "a.out.encap.h"
#else
#include <a.out.h>
#endif
#ifndef N_SET_MAGIC
#define N_SET_MAGIC(exec, val) ((exec).a_magic = (val))
#endif
/*#include <sys/user.h> After a.out.h */
#include <sys/file.h>
#include <sys/stat.h>
#include <machine/psl.h>
#include "wait.h"
#include "gdbcore.h"
#include "gdbcmd.h"
#include "target.h"
#include "symfile.h"
#include "objfiles.h"
static int restore_pc_queue PARAMS ((struct frame_saved_regs *fsr));
static int hppa_alignof PARAMS ((struct type *arg));
static FRAME_ADDR dig_fp_from_stack PARAMS ((FRAME frame,
struct unwind_table_entry *u));
CORE_ADDR frame_saved_pc PARAMS ((FRAME frame));
/* Routines to extract various sized constants out of hppa
instructions. */
/* This assumes that no garbage lies outside of the lower bits of
value. */
int
sign_extend (val, bits)
unsigned val, bits;
{
return (int)(val >> bits - 1 ? (-1 << bits) | val : val);
}
/* For many immediate values the sign bit is the low bit! */
int
low_sign_extend (val, bits)
unsigned val, bits;
{
return (int)((val & 0x1 ? (-1 << (bits - 1)) : 0) | val >> 1);
}
/* extract the immediate field from a ld{bhw}s instruction */
unsigned
get_field (val, from, to)
unsigned val, from, to;
{
val = val >> 31 - to;
return val & ((1 << 32 - from) - 1);
}
unsigned
set_field (val, from, to, new_val)
unsigned *val, from, to;
{
unsigned mask = ~((1 << (to - from + 1)) << (31 - from));
return *val = *val & mask | (new_val << (31 - from));
}
/* extract a 3-bit space register number from a be, ble, mtsp or mfsp */
extract_3 (word)
unsigned word;
{
return GET_FIELD (word, 18, 18) << 2 | GET_FIELD (word, 16, 17);
}
extract_5_load (word)
unsigned word;
{
return low_sign_extend (word >> 16 & MASK_5, 5);
}
/* extract the immediate field from a st{bhw}s instruction */
int
extract_5_store (word)
unsigned word;
{
return low_sign_extend (word & MASK_5, 5);
}
/* extract the immediate field from a break instruction */
unsigned
extract_5r_store (word)
unsigned word;
{
return (word & MASK_5);
}
/* extract the immediate field from a {sr}sm instruction */
unsigned
extract_5R_store (word)
unsigned word;
{
return (word >> 16 & MASK_5);
}
/* extract an 11 bit immediate field */
int
extract_11 (word)
unsigned word;
{
return low_sign_extend (word & MASK_11, 11);
}
/* extract a 14 bit immediate field */
int
extract_14 (word)
unsigned word;
{
return low_sign_extend (word & MASK_14, 14);
}
/* deposit a 14 bit constant in a word */
unsigned
deposit_14 (opnd, word)
int opnd;
unsigned word;
{
unsigned sign = (opnd < 0 ? 1 : 0);
return word | ((unsigned)opnd << 1 & MASK_14) | sign;
}
/* extract a 21 bit constant */
int
extract_21 (word)
unsigned word;
{
int val;
word &= MASK_21;
word <<= 11;
val = GET_FIELD (word, 20, 20);
val <<= 11;
val |= GET_FIELD (word, 9, 19);
val <<= 2;
val |= GET_FIELD (word, 5, 6);
val <<= 5;
val |= GET_FIELD (word, 0, 4);
val <<= 2;
val |= GET_FIELD (word, 7, 8);
return sign_extend (val, 21) << 11;
}
/* deposit a 21 bit constant in a word. Although 21 bit constants are
usually the top 21 bits of a 32 bit constant, we assume that only
the low 21 bits of opnd are relevant */
unsigned
deposit_21 (opnd, word)
unsigned opnd, word;
{
unsigned val = 0;
val |= GET_FIELD (opnd, 11 + 14, 11 + 18);
val <<= 2;
val |= GET_FIELD (opnd, 11 + 12, 11 + 13);
val <<= 2;
val |= GET_FIELD (opnd, 11 + 19, 11 + 20);
val <<= 11;
val |= GET_FIELD (opnd, 11 + 1, 11 + 11);
val <<= 1;
val |= GET_FIELD (opnd, 11 + 0, 11 + 0);
return word | val;
}
/* extract a 12 bit constant from branch instructions */
int
extract_12 (word)
unsigned word;
{
return sign_extend (GET_FIELD (word, 19, 28) |
GET_FIELD (word, 29, 29) << 10 |
(word & 0x1) << 11, 12) << 2;
}
/* extract a 17 bit constant from branch instructions, returning the
19 bit signed value. */
int
extract_17 (word)
unsigned word;
{
return sign_extend (GET_FIELD (word, 19, 28) |
GET_FIELD (word, 29, 29) << 10 |
GET_FIELD (word, 11, 15) << 11 |
(word & 0x1) << 16, 17) << 2;
}
/* Lookup the unwind (stack backtrace) info for the given PC. We search all
of the objfiles seeking the unwind table entry for this PC. Each objfile
contains a sorted list of struct unwind_table_entry. Since we do a binary
search of the unwind tables, we depend upon them to be sorted. */
static struct unwind_table_entry *
find_unwind_entry(pc)
CORE_ADDR pc;
{
int first, middle, last;
struct objfile *objfile;
ALL_OBJFILES (objfile)
{
struct obj_unwind_info *ui;
ui = OBJ_UNWIND_INFO (objfile);
if (!ui)
continue;
/* First, check the cache */
if (ui->cache
&& pc >= ui->cache->region_start
&& pc <= ui->cache->region_end)
return ui->cache;
/* Not in the cache, do a binary search */
first = 0;
last = ui->last;
while (first <= last)
{
middle = (first + last) / 2;
if (pc >= ui->table[middle].region_start
&& pc <= ui->table[middle].region_end)
{
ui->cache = &ui->table[middle];
return &ui->table[middle];
}
if (pc < ui->table[middle].region_start)
last = middle - 1;
else
first = middle + 1;
}
} /* ALL_OBJFILES() */
return NULL;
}
/* Called when no unwind descriptor was found for PC. Returns 1 if it
appears that PC is in a linker stub. */
static int pc_in_linker_stub PARAMS ((CORE_ADDR));
static int
pc_in_linker_stub (pc)
CORE_ADDR pc;
{
int found_magic_instruction = 0;
int i;
char buf[4];
/* If unable to read memory, assume pc is not in a linker stub. */
if (target_read_memory (pc, buf, 4) != 0)
return 0;
/* We are looking for something like
; $$dyncall jams RP into this special spot in the frame (RP')
; before calling the "call stub"
ldw -18(sp),rp
ldsid (rp),r1 ; Get space associated with RP into r1
mtsp r1,sp ; Move it into space register 0
be,n 0(sr0),rp) ; back to your regularly scheduled program
*/
/* Maximum known linker stub size is 4 instructions. Search forward
from the given PC, then backward. */
for (i = 0; i < 4; i++)
{
/* If we hit something with an unwind, stop searching this direction. */
if (find_unwind_entry (pc + i * 4) != 0)
break;
/* Check for ldsid (rp),r1 which is the magic instruction for a
return from a cross-space function call. */
if (read_memory_integer (pc + i * 4, 4) == 0x004010a1)
{
found_magic_instruction = 1;
break;
}
/* Add code to handle long call/branch and argument relocation stubs
here. */
}
if (found_magic_instruction != 0)
return 1;
/* Now look backward. */
for (i = 0; i < 4; i++)
{
/* If we hit something with an unwind, stop searching this direction. */
if (find_unwind_entry (pc - i * 4) != 0)
break;
/* Check for ldsid (rp),r1 which is the magic instruction for a
return from a cross-space function call. */
if (read_memory_integer (pc - i * 4, 4) == 0x004010a1)
{
found_magic_instruction = 1;
break;
}
/* Add code to handle long call/branch and argument relocation stubs
here. */
}
return found_magic_instruction;
}
static int
find_return_regnum(pc)
CORE_ADDR pc;
{
struct unwind_table_entry *u;
u = find_unwind_entry (pc);
if (!u)
return RP_REGNUM;
if (u->Millicode)
return 31;
return RP_REGNUM;
}
/* Return size of frame, or -1 if we should use a frame pointer. */
int
find_proc_framesize(pc)
CORE_ADDR pc;
{
struct unwind_table_entry *u;
u = find_unwind_entry (pc);
if (!u)
{
if (pc_in_linker_stub (pc))
/* Linker stubs have a zero size frame. */
return 0;
else
return -1;
}
if (u->Save_SP)
/* If this bit is set, it means there is a frame pointer and we should
use it. */
return -1;
return u->Total_frame_size << 3;
}
/* Return offset from sp at which rp is saved, or 0 if not saved. */
static int rp_saved PARAMS ((CORE_ADDR));
static int
rp_saved (pc)
CORE_ADDR pc;
{
struct unwind_table_entry *u;
u = find_unwind_entry (pc);
if (!u)
{
if (pc_in_linker_stub (pc))
/* This is the so-called RP'. */
return -24;
else
return 0;
}
if (u->Save_RP)
return -20;
else
return 0;
}
int
frameless_function_invocation (frame)
FRAME frame;
{
struct unwind_table_entry *u;
u = find_unwind_entry (frame->pc);
if (u == 0)
return frameless_look_for_prologue (frame);
return (u->Total_frame_size == 0);
}
CORE_ADDR
saved_pc_after_call (frame)
FRAME frame;
{
int ret_regnum;
ret_regnum = find_return_regnum (get_frame_pc (frame));
return read_register (ret_regnum) & ~0x3;
}
CORE_ADDR
frame_saved_pc (frame)
FRAME frame;
{
CORE_ADDR pc = get_frame_pc (frame);
if (frameless_function_invocation (frame))
{
int ret_regnum;
ret_regnum = find_return_regnum (pc);
return read_register (ret_regnum) & ~0x3;
}
else
{
int rp_offset = rp_saved (pc);
if (rp_offset == 0)
return read_register (RP_REGNUM) & ~0x3;
else
return read_memory_integer (frame->frame + rp_offset, 4) & ~0x3;
}
}
/* We need to correct the PC and the FP for the outermost frame when we are
in a system call. */
void
init_extra_frame_info (fromleaf, frame)
int fromleaf;
struct frame_info *frame;
{
int flags;
int framesize;
if (frame->next && !fromleaf)
return;
/* If the next frame represents a frameless function invocation
then we have to do some adjustments that are normally done by
FRAME_CHAIN. (FRAME_CHAIN is not called in this case.) */
if (fromleaf)
{
/* Find the framesize of *this* frame without peeking at the PC
in the current frame structure (it isn't set yet). */
framesize = find_proc_framesize (FRAME_SAVED_PC (get_next_frame (frame)));
/* Now adjust our base frame accordingly. If we have a frame pointer
use it, else subtract the size of this frame from the current
frame. (we always want frame->frame to point at the lowest address
in the frame). */
if (framesize == -1)
frame->frame = read_register (FP_REGNUM);
else
frame->frame -= framesize;
return;
}
flags = read_register (FLAGS_REGNUM);
if (flags & 2) /* In system call? */
frame->pc = read_register (31) & ~0x3;
/* The outermost frame is always derived from PC-framesize
One might think frameless innermost frames should have
a frame->frame that is the same as the parent's frame->frame.
That is wrong; frame->frame in that case should be the *high*
address of the parent's frame. It's complicated as hell to
explain, but the parent *always* creates some stack space for
the child. So the child actually does have a frame of some
sorts, and its base is the high address in its parent's frame. */
framesize = find_proc_framesize(frame->pc);
if (framesize == -1)
frame->frame = read_register (FP_REGNUM);
else
frame->frame = read_register (SP_REGNUM) - framesize;
}
/* Given a GDB frame, determine the address of the calling function's frame.
This will be used to create a new GDB frame struct, and then
INIT_EXTRA_FRAME_INFO and INIT_FRAME_PC will be called for the new frame.
This may involve searching through prologues for several functions
at boundaries where GCC calls HP C code, or where code which has
a frame pointer calls code without a frame pointer. */
FRAME_ADDR
frame_chain (frame)
struct frame_info *frame;
{
int my_framesize, caller_framesize;
struct unwind_table_entry *u;
/* Get frame sizes for the current frame and the frame of the
caller. */
my_framesize = find_proc_framesize (frame->pc);
caller_framesize = find_proc_framesize (FRAME_SAVED_PC(frame));
/* If caller does not have a frame pointer, then its frame
can be found at current_frame - caller_framesize. */
if (caller_framesize != -1)
return frame->frame - caller_framesize;
/* Both caller and callee have frame pointers and are GCC compiled
(SAVE_SP bit in unwind descriptor is on for both functions.
The previous frame pointer is found at the top of the current frame. */
if (caller_framesize == -1 && my_framesize == -1)
return read_memory_integer (frame->frame, 4);
/* Caller has a frame pointer, but callee does not. This is a little
more difficult as GCC and HP C lay out locals and callee register save
areas very differently.
The previous frame pointer could be in a register, or in one of
several areas on the stack.
Walk from the current frame to the innermost frame examining
unwind descriptors to determine if %r3 ever gets saved into the
stack. If so return whatever value got saved into the stack.
If it was never saved in the stack, then the value in %r3 is still
valid, so use it.
We use information from unwind descriptors to determine if %r3
is saved into the stack (Entry_GR field has this information). */
while (frame)
{
u = find_unwind_entry (frame->pc);
if (!u)
{
/* We could find this information by examining prologues. I don't
think anyone has actually written any tools (not even "strip")
which leave them out of an executable, so maybe this is a moot
point. */
warning ("Unable to find unwind for PC 0x%x -- Help!", frame->pc);
return 0;
}
/* Entry_GR specifies the number of callee-saved general registers
saved in the stack. It starts at %r3, so %r3 would be 1. */
if (u->Entry_GR >= 1 || u->Save_SP)
break;
else
frame = frame->next;
}
if (frame)
{
/* We may have walked down the chain into a function with a frame
pointer. */
if (u->Save_SP)
return read_memory_integer (frame->frame, 4);
/* %r3 was saved somewhere in the stack. Dig it out. */
else
return dig_fp_from_stack (frame, u);
}
else
{
/* The value in %r3 was never saved into the stack (thus %r3 still
holds the value of the previous frame pointer). */
return read_register (FP_REGNUM);
}
}
/* Given a frame and an unwind descriptor return the value for %fr (aka fp)
which was saved into the stack. FIXME: Why can't we just use the standard
saved_regs stuff? */
static FRAME_ADDR
dig_fp_from_stack (frame, u)
FRAME frame;
struct unwind_table_entry *u;
{
CORE_ADDR pc = u->region_start;
/* Search the function for the save of %r3. */
while (pc != u->region_end)
{
char buf[4];
unsigned long inst;
int status;
/* We need only look for the standard stw %r3,X(%sp) instruction,
the other variants (eg stwm) are only used on the first register
save (eg %r3). */
status = target_read_memory (pc, buf, 4);
inst = extract_unsigned_integer (buf, 4);
if (status != 0)
memory_error (status, pc);
/* Check for stw %r3,X(%sp). */
if ((inst & 0xffffc000) == 0x6bc30000)
{
/* Found the instruction which saves %r3. The offset (relative
to this frame) is framesize + immed14 (derived from the
store instruction). */
int offset = (u->Total_frame_size << 3) + extract_14 (inst);
return read_memory_integer (frame->frame + offset, 4);
}
/* Keep looking. */
pc += 4;
}
warning ("Unable to find %%r3 in stack.\n");
return 0;
}
/* To see if a frame chain is valid, see if the caller looks like it
was compiled with gcc. */
int
frame_chain_valid (chain, thisframe)
FRAME_ADDR chain;
FRAME thisframe;
{
struct minimal_symbol *msym_us;
struct minimal_symbol *msym_start;
struct unwind_table_entry *u;
if (!chain)
return 0;
u = find_unwind_entry (thisframe->pc);
/* We can't just check that the same of msym_us is "_start", because
someone idiotically decided that they were going to make a Ltext_end
symbol with the same address. This Ltext_end symbol is totally
indistinguishable (as nearly as I can tell) from the symbol for a function
which is (legitimately, since it is in the user's namespace)
named Ltext_end, so we can't just ignore it. */
msym_us = lookup_minimal_symbol_by_pc (FRAME_SAVED_PC (thisframe));
msym_start = lookup_minimal_symbol ("_start", NULL);
if (msym_us
&& msym_start
&& SYMBOL_VALUE_ADDRESS (msym_us) == SYMBOL_VALUE_ADDRESS (msym_start))
return 0;
if (u == NULL)
return 1;
if (u->Save_SP || u->Total_frame_size)
return 1;
if (pc_in_linker_stub (thisframe->pc))
return 1;
return 0;
}
/*
* These functions deal with saving and restoring register state
* around a function call in the inferior. They keep the stack
* double-word aligned; eventually, on an hp700, the stack will have
* to be aligned to a 64-byte boundary.
*/
int
push_dummy_frame ()
{
register CORE_ADDR sp;
register int regnum;
int int_buffer;
double freg_buffer;
/* Space for "arguments"; the RP goes in here. */
sp = read_register (SP_REGNUM) + 48;
int_buffer = read_register (RP_REGNUM) | 0x3;
write_memory (sp - 20, (char *)&int_buffer, 4);
int_buffer = read_register (FP_REGNUM);
write_memory (sp, (char *)&int_buffer, 4);
write_register (FP_REGNUM, sp);
sp += 8;
for (regnum = 1; regnum < 32; regnum++)
if (regnum != RP_REGNUM && regnum != FP_REGNUM)
sp = push_word (sp, read_register (regnum));
sp += 4;
for (regnum = FP0_REGNUM; regnum < NUM_REGS; regnum++)
{
read_register_bytes (REGISTER_BYTE (regnum), (char *)&freg_buffer, 8);
sp = push_bytes (sp, (char *)&freg_buffer, 8);
}
sp = push_word (sp, read_register (IPSW_REGNUM));
sp = push_word (sp, read_register (SAR_REGNUM));
sp = push_word (sp, read_register (PCOQ_HEAD_REGNUM));
sp = push_word (sp, read_register (PCSQ_HEAD_REGNUM));
sp = push_word (sp, read_register (PCOQ_TAIL_REGNUM));
sp = push_word (sp, read_register (PCSQ_TAIL_REGNUM));
write_register (SP_REGNUM, sp);
}
find_dummy_frame_regs (frame, frame_saved_regs)
struct frame_info *frame;
struct frame_saved_regs *frame_saved_regs;
{
CORE_ADDR fp = frame->frame;
int i;
frame_saved_regs->regs[RP_REGNUM] = fp - 20 & ~0x3;
frame_saved_regs->regs[FP_REGNUM] = fp;
frame_saved_regs->regs[1] = fp + 8;
for (fp += 12, i = 3; i < 32; i++)
{
if (i != FP_REGNUM)
{
frame_saved_regs->regs[i] = fp;
fp += 4;
}
}
fp += 4;
for (i = FP0_REGNUM; i < NUM_REGS; i++, fp += 8)
frame_saved_regs->regs[i] = fp;
frame_saved_regs->regs[IPSW_REGNUM] = fp;
frame_saved_regs->regs[SAR_REGNUM] = fp + 4;
frame_saved_regs->regs[PCOQ_HEAD_REGNUM] = fp + 8;
frame_saved_regs->regs[PCSQ_HEAD_REGNUM] = fp + 12;
frame_saved_regs->regs[PCOQ_TAIL_REGNUM] = fp + 16;
frame_saved_regs->regs[PCSQ_TAIL_REGNUM] = fp + 20;
}
int
hppa_pop_frame ()
{
register FRAME frame = get_current_frame ();
register CORE_ADDR fp;
register int regnum;
struct frame_saved_regs fsr;
struct frame_info *fi;
double freg_buffer;
fi = get_frame_info (frame);
fp = fi->frame;
get_frame_saved_regs (fi, &fsr);
if (fsr.regs[IPSW_REGNUM]) /* Restoring a call dummy frame */
restore_pc_queue (&fsr);
for (regnum = 31; regnum > 0; regnum--)
if (fsr.regs[regnum])
write_register (regnum, read_memory_integer (fsr.regs[regnum], 4));
for (regnum = NUM_REGS - 1; regnum >= FP0_REGNUM ; regnum--)
if (fsr.regs[regnum])
{
read_memory (fsr.regs[regnum], (char *)&freg_buffer, 8);
write_register_bytes (REGISTER_BYTE (regnum), (char *)&freg_buffer, 8);
}
if (fsr.regs[IPSW_REGNUM])
write_register (IPSW_REGNUM,
read_memory_integer (fsr.regs[IPSW_REGNUM], 4));
if (fsr.regs[SAR_REGNUM])
write_register (SAR_REGNUM,
read_memory_integer (fsr.regs[SAR_REGNUM], 4));
/* If the PC was explicitly saved, then just restore it. */
if (fsr.regs[PCOQ_TAIL_REGNUM])
write_register (PCOQ_TAIL_REGNUM,
read_memory_integer (fsr.regs[PCOQ_TAIL_REGNUM], 4));
/* Else use the value in %rp to set the new PC. */
else
target_write_pc (read_register (RP_REGNUM));
write_register (FP_REGNUM, read_memory_integer (fp, 4));
if (fsr.regs[IPSW_REGNUM]) /* call dummy */
write_register (SP_REGNUM, fp - 48);
else
write_register (SP_REGNUM, fp);
flush_cached_frames ();
set_current_frame (create_new_frame (read_register (FP_REGNUM),
read_pc ()));
}
/*
* After returning to a dummy on the stack, restore the instruction
* queue space registers. */
static int
restore_pc_queue (fsr)
struct frame_saved_regs *fsr;
{
CORE_ADDR pc = read_pc ();
CORE_ADDR new_pc = read_memory_integer (fsr->regs[PCOQ_HEAD_REGNUM], 4);
int pid;
WAITTYPE w;
int insn_count;
/* Advance past break instruction in the call dummy. */
write_register (PCOQ_HEAD_REGNUM, pc + 4);
write_register (PCOQ_TAIL_REGNUM, pc + 8);
/*
* HPUX doesn't let us set the space registers or the space
* registers of the PC queue through ptrace. Boo, hiss.
* Conveniently, the call dummy has this sequence of instructions
* after the break:
* mtsp r21, sr0
* ble,n 0(sr0, r22)
*
* So, load up the registers and single step until we are in the
* right place.
*/
write_register (21, read_memory_integer (fsr->regs[PCSQ_HEAD_REGNUM], 4));
write_register (22, new_pc);
for (insn_count = 0; insn_count < 3; insn_count++)
{
/* FIXME: What if the inferior gets a signal right now? Want to
merge this into wait_for_inferior (as a special kind of
watchpoint? By setting a breakpoint at the end? Is there
any other choice? Is there *any* way to do this stuff with
ptrace() or some equivalent?). */
resume (1, 0);
* breakpoint.c (breakpoint_thread_match break_command_1): Thread-specific breakpoint support. * breakpoint.h (struct breakpoint): Add thread id field. * fork-child.c (fork_inferior): Move call to init_thread_list() back a bit so that init_trace_fun can do thread functions. * hppa-tdep.c (restore_pc_queue): Add pid to call to target_wait. * hppab-nat.c (child_resume): Handle default pid. * hppah-nat.c (child_resume): Handle default pid. * i386lynx-nat.c (child_wait): New arg pid. * inflow.c (kill_command): Reset thread list. * infptrace.c (child_resume): Handle default pid. * infrun.c: Thread-specific breakpoint support. * inftarg.c (child_wait): Add pid arg. * osfsolib.c (solib_create_inferior_hook): Add pid to call to target_resume. * procfs.c: Multi-thread support. * remote-bug.c (bug_wait): Add pid arg. * remote-hms.c (hms_wait): Add pid arg. * remote-mips.c (mips_wait): Add pid arg. * remote-mon.c (monitor_wait): Add pid arg. * remote-nindy.c (nindy_wait): Add pid arg. * remote-sim.c (gdbsim_wait): Add pid arg. * remote-udi.c (udi_wait): Add pid arg. * remote-vx.c (vx_wait): Add pid arg. * remote-z8k.c (sim_wait): Add pid arg. * remote.c (remote_wait): Add pid arg. * solib.c (solib_create_inferior_hook): Add pid to call to target_resume. * target.h (struct target_ops): Add pid arg to to_wait and to_notice_signals. * thread.c (valid_thread_id): New func to validate thread #s. * (pid_to_thread_id): New func to do the obvious. * thread.h: Prototypes for above. * coff-solib.c (coff_solib_add): Use nameoffset field to locate filename.
1993-10-16 07:42:02 +01:00
target_wait(inferior_pid, &w);
if (!WIFSTOPPED (w))
{
stop_signal = WTERMSIG (w);
terminal_ours_for_output ();
printf_unfiltered ("\nProgram terminated with signal %d, %s\n",
stop_signal, safe_strsignal (stop_signal));
gdb_flush (gdb_stdout);
return 0;
}
}
target_terminal_ours ();
fetch_inferior_registers (-1);
return 1;
}
CORE_ADDR
hppa_push_arguments (nargs, args, sp, struct_return, struct_addr)
int nargs;
value *args;
CORE_ADDR sp;
int struct_return;
CORE_ADDR struct_addr;
{
/* array of arguments' offsets */
int *offset = (int *)alloca(nargs * sizeof (int));
int cum = 0;
int i, alignment;
for (i = 0; i < nargs; i++)
{
/* Coerce chars to int & float to double if necessary */
args[i] = value_arg_coerce (args[i]);
cum += TYPE_LENGTH (VALUE_TYPE (args[i]));
/* value must go at proper alignment. Assume alignment is a
power of two.*/
alignment = hppa_alignof (VALUE_TYPE (args[i]));
if (cum % alignment)
cum = (cum + alignment) & -alignment;
offset[i] = -cum;
}
sp += max ((cum + 7) & -8, 16);
for (i = 0; i < nargs; i++)
write_memory (sp + offset[i], VALUE_CONTENTS (args[i]),
TYPE_LENGTH (VALUE_TYPE (args[i])));
if (struct_return)
write_register (28, struct_addr);
return sp + 32;
}
/*
* Insert the specified number of args and function address
* into a call sequence of the above form stored at DUMMYNAME.
*
* On the hppa we need to call the stack dummy through $$dyncall.
* Therefore our version of FIX_CALL_DUMMY takes an extra argument,
* real_pc, which is the location where gdb should start up the
* inferior to do the function call.
*/
CORE_ADDR
hppa_fix_call_dummy (dummy, pc, fun, nargs, args, type, gcc_p)
char *dummy;
CORE_ADDR pc;
CORE_ADDR fun;
int nargs;
value *args;
struct type *type;
int gcc_p;
{
CORE_ADDR dyncall_addr, sr4export_addr;
struct minimal_symbol *msymbol;
int flags = read_register (FLAGS_REGNUM);
msymbol = lookup_minimal_symbol ("$$dyncall", (struct objfile *) NULL);
if (msymbol == NULL)
error ("Can't find an address for $$dyncall trampoline");
dyncall_addr = SYMBOL_VALUE_ADDRESS (msymbol);
msymbol = lookup_minimal_symbol ("_sr4export", (struct objfile *) NULL);
if (msymbol == NULL)
error ("Can't find an address for _sr4export trampoline");
sr4export_addr = SYMBOL_VALUE_ADDRESS (msymbol);
store_unsigned_integer
(&dummy[9*REGISTER_SIZE],
REGISTER_SIZE,
deposit_21 (fun >> 11,
extract_unsigned_integer (&dummy[9*REGISTER_SIZE],
REGISTER_SIZE)));
store_unsigned_integer
(&dummy[10*REGISTER_SIZE],
REGISTER_SIZE,
deposit_14 (fun & MASK_11,
extract_unsigned_integer (&dummy[10*REGISTER_SIZE],
REGISTER_SIZE)));
store_unsigned_integer
(&dummy[12*REGISTER_SIZE],
REGISTER_SIZE,
deposit_21 (sr4export_addr >> 11,
extract_unsigned_integer (&dummy[12*REGISTER_SIZE],
REGISTER_SIZE)));
store_unsigned_integer
(&dummy[13*REGISTER_SIZE],
REGISTER_SIZE,
deposit_14 (sr4export_addr & MASK_11,
extract_unsigned_integer (&dummy[13*REGISTER_SIZE],
REGISTER_SIZE)));
write_register (22, pc);
/* If we are in a syscall, then we should call the stack dummy
directly. $$dyncall is not needed as the kernel sets up the
space id registers properly based on the value in %r31. In
fact calling $$dyncall will not work because the value in %r22
will be clobbered on the syscall exit path. */
if (flags & 2)
return pc;
else
return dyncall_addr;
}
/* Get the PC from %r31 if currently in a syscall. Also mask out privilege
bits. */
CORE_ADDR
target_read_pc ()
{
int flags = read_register (FLAGS_REGNUM);
if (flags & 2)
return read_register (31) & ~0x3;
return read_register (PC_REGNUM) & ~0x3;
}
/* Write out the PC. If currently in a syscall, then also write the new
PC value into %r31. */
void
target_write_pc (v)
CORE_ADDR v;
{
int flags = read_register (FLAGS_REGNUM);
/* If in a syscall, then set %r31. Also make sure to get the
privilege bits set correctly. */
if (flags & 2)
write_register (31, (long) (v | 0x3));
write_register (PC_REGNUM, (long) v);
write_register (NPC_REGNUM, (long) v + 4);
}
/* return the alignment of a type in bytes. Structures have the maximum
alignment required by their fields. */
static int
hppa_alignof (arg)
struct type *arg;
{
int max_align, align, i;
switch (TYPE_CODE (arg))
{
case TYPE_CODE_PTR:
case TYPE_CODE_INT:
case TYPE_CODE_FLT:
return TYPE_LENGTH (arg);
case TYPE_CODE_ARRAY:
return hppa_alignof (TYPE_FIELD_TYPE (arg, 0));
case TYPE_CODE_STRUCT:
case TYPE_CODE_UNION:
max_align = 2;
for (i = 0; i < TYPE_NFIELDS (arg); i++)
{
/* Bit fields have no real alignment. */
if (!TYPE_FIELD_BITPOS (arg, i))
{
align = hppa_alignof (TYPE_FIELD_TYPE (arg, i));
max_align = max (max_align, align);
}
}
return max_align;
default:
return 4;
}
}
/* Print the register regnum, or all registers if regnum is -1 */
pa_do_registers_info (regnum, fpregs)
int regnum;
int fpregs;
{
char raw_regs [REGISTER_BYTES];
int i;
for (i = 0; i < NUM_REGS; i++)
read_relative_register_raw_bytes (i, raw_regs + REGISTER_BYTE (i));
if (regnum == -1)
pa_print_registers (raw_regs, regnum, fpregs);
else if (regnum < FP0_REGNUM)
printf_unfiltered ("%s %x\n", reg_names[regnum], *(long *)(raw_regs +
REGISTER_BYTE (regnum)));
else
pa_print_fp_reg (regnum);
}
pa_print_registers (raw_regs, regnum, fpregs)
char *raw_regs;
int regnum;
int fpregs;
{
int i;
for (i = 0; i < 18; i++)
printf_unfiltered ("%8.8s: %8x %8.8s: %8x %8.8s: %8x %8.8s: %8x\n",
reg_names[i],
*(int *)(raw_regs + REGISTER_BYTE (i)),
reg_names[i + 18],
*(int *)(raw_regs + REGISTER_BYTE (i + 18)),
reg_names[i + 36],
*(int *)(raw_regs + REGISTER_BYTE (i + 36)),
reg_names[i + 54],
*(int *)(raw_regs + REGISTER_BYTE (i + 54)));
if (fpregs)
for (i = 72; i < NUM_REGS; i++)
pa_print_fp_reg (i);
}
pa_print_fp_reg (i)
int i;
{
unsigned char raw_buffer[MAX_REGISTER_RAW_SIZE];
unsigned char virtual_buffer[MAX_REGISTER_VIRTUAL_SIZE];
* findvar.c (value_of_register, value_from_register), hppa-tdep.c (pa_print_fp_reg), infcmd.c (do_registers_info), valops.c (value_assign): Use REGISTER_CONVERT_TO_* only if REGISTER_CONVERTIBLE is defined, otherwise just copy the content. Pass desired type to REGISTER_CONVERT_TO_*. * config/m68k/tm-m68k.h, config/i960/tm-i960.h (REGISTER_CONVERT_*): Pass length of desired type to store/extract_floating. * config/i386/tm-arm.h, config/i386/tm-i386aix.h, config/i386/tm-sun386.h, config/i386/tm-symmetry.h, config/m88k/tm-m88k.h config/rs6000/tm-rs6000.h (REGISTER_CONVERT_*): Use extract_floating and store_floating with length of desired type. * config/m68k/tm-news.h (STORE,EXTRACT_RETURN_VALUE): Add type parameter to REGISTER_CONVERT_*. * config/a29k/tm-a29k.h, config/convex/tm-convex.h, config/gould/tm-np1.h, config/gould/tm-pn.h, config/h8300/tm-h8300.h, config/h8500/tm-h8500.h, config/i386/tm-i386v.h, config/mips/tm-mips.h, config/ns32k/tm-merlin.h, config/ns32k/tm-umax.h, config/pa/tm-hppa.h, config/pyr/tm-pyr.h, config/sh/tm-sh.h, config/sparc/tm-sparc.h, config/tahoe/tm-tahoe.h, config/vax/tm-vax.h, config/z8k/tm-z8k.h (REGISTER_CONVERTIBLE, REGISTER_CONVERT_TO_RAW, REGISTER_CONVERT_TO_VIRTUAL): Remove versions for which REGISTER_CONVERTIBLE is always false. * z8k-tdep.c (register_convert_to_virtual, register_convert_to_raw): Remove, no longer used. * alpha-tdep.c (alpha_register_convert_to_raw, alpha_register_convert_to_virtual): New routines to handle the different raw formats in alpha floating point registers. * config/alpha/tm-alpha.h (REGISTER_CONVERTIBLE, REGISTER_CONVERT_TO_VIRTUAL, REGISTER_CONVERT_TO_RAW): Use them.
1993-11-02 22:51:10 +01:00
/* Get the data in raw format. */
read_relative_register_raw_bytes (i, raw_buffer);
* findvar.c (value_of_register, value_from_register), hppa-tdep.c (pa_print_fp_reg), infcmd.c (do_registers_info), valops.c (value_assign): Use REGISTER_CONVERT_TO_* only if REGISTER_CONVERTIBLE is defined, otherwise just copy the content. Pass desired type to REGISTER_CONVERT_TO_*. * config/m68k/tm-m68k.h, config/i960/tm-i960.h (REGISTER_CONVERT_*): Pass length of desired type to store/extract_floating. * config/i386/tm-arm.h, config/i386/tm-i386aix.h, config/i386/tm-sun386.h, config/i386/tm-symmetry.h, config/m88k/tm-m88k.h config/rs6000/tm-rs6000.h (REGISTER_CONVERT_*): Use extract_floating and store_floating with length of desired type. * config/m68k/tm-news.h (STORE,EXTRACT_RETURN_VALUE): Add type parameter to REGISTER_CONVERT_*. * config/a29k/tm-a29k.h, config/convex/tm-convex.h, config/gould/tm-np1.h, config/gould/tm-pn.h, config/h8300/tm-h8300.h, config/h8500/tm-h8500.h, config/i386/tm-i386v.h, config/mips/tm-mips.h, config/ns32k/tm-merlin.h, config/ns32k/tm-umax.h, config/pa/tm-hppa.h, config/pyr/tm-pyr.h, config/sh/tm-sh.h, config/sparc/tm-sparc.h, config/tahoe/tm-tahoe.h, config/vax/tm-vax.h, config/z8k/tm-z8k.h (REGISTER_CONVERTIBLE, REGISTER_CONVERT_TO_RAW, REGISTER_CONVERT_TO_VIRTUAL): Remove versions for which REGISTER_CONVERTIBLE is always false. * z8k-tdep.c (register_convert_to_virtual, register_convert_to_raw): Remove, no longer used. * alpha-tdep.c (alpha_register_convert_to_raw, alpha_register_convert_to_virtual): New routines to handle the different raw formats in alpha floating point registers. * config/alpha/tm-alpha.h (REGISTER_CONVERTIBLE, REGISTER_CONVERT_TO_VIRTUAL, REGISTER_CONVERT_TO_RAW): Use them.
1993-11-02 22:51:10 +01:00
/* Convert raw data to virtual format if necessary. */
#ifdef REGISTER_CONVERTIBLE
if (REGISTER_CONVERTIBLE (i))
{
REGISTER_CONVERT_TO_VIRTUAL (i, REGISTER_VIRTUAL_TYPE (i),
raw_buffer, virtual_buffer);
}
else
#endif
memcpy (virtual_buffer, raw_buffer,
REGISTER_VIRTUAL_SIZE (i));
fputs_filtered (reg_names[i], gdb_stdout);
print_spaces_filtered (15 - strlen (reg_names[i]), gdb_stdout);
val_print (REGISTER_VIRTUAL_TYPE (i), virtual_buffer, 0, gdb_stdout, 0,
1, 0, Val_pretty_default);
printf_filtered ("\n");
}
/* Function calls that pass into a new compilation unit must pass through a
small piece of code that does long format (`external' in HPPA parlance)
jumps. We figure out where the trampoline is going to end up, and return
the PC of the final destination. If we aren't in a trampoline, we just
return NULL.
For computed calls, we just extract the new PC from r22. */
CORE_ADDR
skip_trampoline_code (pc, name)
CORE_ADDR pc;
char *name;
{
long inst0, inst1;
static CORE_ADDR dyncall = 0;
struct minimal_symbol *msym;
/* FIXME XXX - dyncall must be initialized whenever we get a new exec file */
if (!dyncall)
{
msym = lookup_minimal_symbol ("$$dyncall", NULL);
if (msym)
dyncall = SYMBOL_VALUE_ADDRESS (msym);
else
dyncall = -1;
}
if (pc == dyncall)
return (CORE_ADDR)(read_register (22) & ~0x3);
inst0 = read_memory_integer (pc, 4);
inst1 = read_memory_integer (pc+4, 4);
if ( (inst0 & 0xffe00000) == 0x20200000 /* ldil xxx, r1 */
&& (inst1 & 0xffe0e002) == 0xe0202002) /* be,n yyy(sr4, r1) */
pc = extract_21 (inst0) + extract_17 (inst1);
else
pc = (CORE_ADDR)NULL;
return pc;
}
/* Advance PC across any function entry prologue instructions
to reach some "real" code. */
/* skip (stw rp, -20(0,sp)); copy 4,1; copy sp, 4; stwm 1,framesize(sp)
for gcc, or (stw rp, -20(0,sp); stwm 1, framesize(sp) for hcc */
CORE_ADDR
skip_prologue(pc)
CORE_ADDR pc;
{
char buf[4];
unsigned long inst;
int status;
status = target_read_memory (pc, buf, 4);
inst = extract_unsigned_integer (buf, 4);
if (status != 0)
return pc;
if (inst == 0x6BC23FD9) /* stw rp,-20(sp) */
{
if (read_memory_integer (pc + 4, 4) == 0x8030241) /* copy r3,r1 */
pc += 16;
else if ((read_memory_integer (pc + 4, 4) & ~MASK_14) == 0x68710000) /* stw r1,(r3) */
pc += 8;
}
else if (read_memory_integer (pc, 4) == 0x8030241) /* copy r3,r1 */
pc += 12;
else if ((read_memory_integer (pc, 4) & ~MASK_14) == 0x68710000) /* stw r1,(r3) */
pc += 4;
return pc;
}
#ifdef MAINTENANCE_CMDS
static void
unwind_command (exp, from_tty)
char *exp;
int from_tty;
{
CORE_ADDR address;
union
{
int *foo;
struct unwind_table_entry *u;
} xxx;
/* If we have an expression, evaluate it and use it as the address. */
if (exp != 0 && *exp != 0)
address = parse_and_eval_address (exp);
else
return;
xxx.u = find_unwind_entry (address);
if (!xxx.u)
{
printf_unfiltered ("Can't find unwind table entry for PC 0x%x\n", address);
return;
}
printf_unfiltered ("%08x\n%08X\n%08X\n%08X\n", xxx.foo[0], xxx.foo[1], xxx.foo[2],
xxx.foo[3]);
}
#endif /* MAINTENANCE_CMDS */
void
_initialize_hppa_tdep ()
{
#ifdef MAINTENANCE_CMDS
add_cmd ("unwind", class_maintenance, unwind_command,
"Print unwind table entry at given address.",
&maintenanceprintlist);
#endif /* MAINTENANCE_CMDS */
}