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Index: gcc/ChangeLog 

2004-06-28  Geoffrey Keating  <geoffk@apple.com>
	    Andreas Tobler  <a.tobler@schweiz.ch>

	PR 15813
	* dwarf2out.c (reg_save): Output DW_CFA_same_value when a
	register is saved in itself.
	(initial_return_save): If the return address is a register,
	it's already there, don't bother to mention it in the CFI.
	(struct queued_reg_save): Add field saved_reg.
	(struct reg_saved_in_data): New.
	(regs_saved_in_regs): New.
	(num_regs_saved_in_regs): New.
	(queue_reg_save): Add extra parameter to specify register saved
	in register.  Remove duplicate entries from queue.  Add comment
	for function.
	(flush_queued_reg_saves): Handle registers saved in registers.
	Update regs_saved_in_regs.  Add comment for function.
	(clobbers_queued_reg_save): Add comment for function.  Allow
	for regs_saved_in_regs.
	(reg_saved_in): New.
	(dwarf2out_frame_debug_expr): Handle saving registers in other
	registers.
	(dwarf2out_frame_debug): Reset regs_saved_in_regs.
	* unwind-dw2.c (execute_cfa_program): Correct handling of
	DW_CFA_same_value.  Add FIXME comment about incorrect implementation
	of DW_CFA_restore_extended.
	* config/rs6000/rs6000.c (rs6000_emit_prologue): Let
	dwarf2out_frame_debug_expr see instructions that save registers
	in other registers or save those other registers in memory.

	* unwind-dw2.c (DWARF_FRAME_REGISTERS): Move to unwind-dw2.h.
	(_Unwind_FrameState): Likewise.
	* unwind-dw2.h: New.
	* Makefile.in (LIB2ADDEHDEP): Add unwind-dw2.h.
	* config/rs6000/darwin-fallback.c: New file.
	* config/rs6000/darwin.h (MD_FALLBACK_FRAME_STATE_FOR): Define.
	* config/rs6000/t-darwin (LIB2FUNCS_EXTRA): Add darwin-fallback.o.

Index: gcc/testsuite/ChangeLog
2004-06-26  Geoffrey Keating  <geoffk@apple.com>
	    Andreas Tobler  <a.tobler@schweiz.ch>

	* gcc.dg/cleanup-10.c: Run on all Linux platforms and powerpc-darwin.
	Use SA_RESETHAND rather than SA_ONESHOT.  Trap SIGBUS as well
	as SIGSEGV.
	* gcc.dg/cleanup-11.c: Likewise.
	* gcc.dg/cleanup-8.c: Likewise.
	* gcc.dg/cleanup-9.c: Likewise.
	* gcc.dg/cleanup-5.c: Run on all platforms.

Index: libjava/ChangeLog
2004-06-26  Geoffrey Keating  <geoffk@apple.com>
	    Andreas Tobler  <a.tobler@schweiz.ch>

	* configure.host (powerpc-*-darwin*): New case, define
	can_unwind_signal.
	* configure.in (*-*-darwin*): New case, point to darwin-signal.h.
	* configure: Regenerate.
	* include/darwin-signal.h: New.

Co-Authored-By: Andreas Tobler <a.tobler@schweiz.ch>

From-SVN: r83953
This commit is contained in:
Geoffrey Keating 2004-07-01 04:09:07 +00:00 committed by Geoffrey Keating
parent ec6376abd7
commit f8a57be818
20 changed files with 861 additions and 124 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

38
gcc/ChangeLog
View File

@ -1,3 +1,41 @@
2004-06-28 Geoffrey Keating <geoffk@apple.com>
Andreas Tobler <a.tobler@schweiz.ch>
PR 15813
* dwarf2out.c (reg_save): Output DW_CFA_same_value when a
register is saved in itself.
(initial_return_save): If the return address is a register,
it's already there, don't bother to mention it in the CFI.
(struct queued_reg_save): Add field saved_reg.
(struct reg_saved_in_data): New.
(regs_saved_in_regs): New.
(num_regs_saved_in_regs): New.
(queue_reg_save): Add extra parameter to specify register saved
in register. Remove duplicate entries from queue. Add comment
for function.
(flush_queued_reg_saves): Handle registers saved in registers.
Update regs_saved_in_regs. Add comment for function.
(clobbers_queued_reg_save): Add comment for function. Allow
for regs_saved_in_regs.
(reg_saved_in): New.
(dwarf2out_frame_debug_expr): Handle saving registers in other
registers.
(dwarf2out_frame_debug): Reset regs_saved_in_regs.
* unwind-dw2.c (execute_cfa_program): Correct handling of
DW_CFA_same_value. Add FIXME comment about incorrect implementation
of DW_CFA_restore_extended.
* config/rs6000/rs6000.c (rs6000_emit_prologue): Let
dwarf2out_frame_debug_expr see instructions that save registers
in other registers or save those other registers in memory.
* unwind-dw2.c (DWARF_FRAME_REGISTERS): Move to unwind-dw2.h.
(_Unwind_FrameState): Likewise.
* unwind-dw2.h: New.
* Makefile.in (LIB2ADDEHDEP): Add unwind-dw2.h.
* config/rs6000/darwin-fallback.c: New file.
* config/rs6000/darwin.h (MD_FALLBACK_FRAME_STATE_FOR): Define.
* config/rs6000/t-darwin (LIB2FUNCS_EXTRA): Add darwin-fallback.o.
2004-07-01 Alan Modra <amodra@bigpond.net.au>
* config/rs6000/rs6000.c (rs6000_mixed_function_arg): Rewrite.

2
gcc/Makefile.in
View File

@ -528,7 +528,7 @@ CRTSTUFF_CFLAGS = -O2 $(GCC_CFLAGS) $(INCLUDES) $(MULTILIB_CFLAGS) -g0 \
# Additional sources to handle exceptions; overridden by targets as needed.
LIB2ADDEH = $(srcdir)/unwind-dw2.c $(srcdir)/unwind-dw2-fde.c \
$(srcdir)/unwind-sjlj.c $(srcdir)/gthr-gnat.c $(srcdir)/unwind-c.c
LIB2ADDEHDEP = unwind.inc unwind-dw2-fde.h
LIB2ADDEHDEP = unwind.inc unwind-dw2-fde.h unwind-dw2.h
# nm flags to list global symbols in libgcc object files.
SHLIB_NM_FLAGS = -pg

432
gcc/config/rs6000/darwin-fallback.c Normal file
View File

@ -0,0 +1,432 @@
/* Fallback frame-state unwinder for Darwin.
Copyright (C) 2004 Free Software Foundation, Inc.
This file is part of GCC.
GCC 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, or (at your option)
any later version.
In addition to the permissions in the GNU General Public License, the
Free Software Foundation gives you unlimited permission to link the
compiled version of this file into combinations with other programs,
and to distribute those combinations without any restriction coming
from the use of this file. (The General Public License restrictions
do apply in other respects; for example, they cover modification of
the file, and distribution when not linked into a combined
executable.)
GCC 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 GCC; see the file COPYING. If not, write to the Free
Software Foundation, 59 Temple Place - Suite 330, Boston, MA
02111-1307, USA. */
#include "tconfig.h"
#include "tsystem.h"
#include "coretypes.h"
#include "tm.h"
#include "dwarf2.h"
#include "unwind.h"
#include "unwind-dw2.h"
#include <stdint.h>
#include <stdbool.h>
#include <signal.h>
#include <ucontext.h>
typedef unsigned long reg_unit;
/* Place in GPRS the parameters to the first 'sc' instruction that would
have been executed if we were returning from this CONTEXT, or
return false if an unexpected instruction is encountered. */
static bool
interpret_libc (reg_unit gprs[32], struct _Unwind_Context *context)
{
uint32_t *pc = (uint32_t *)_Unwind_GetIP (context);
uint32_t cr;
reg_unit lr = (reg_unit) pc;
reg_unit ctr = 0;
uint32_t *invalid_address = NULL;
int i;
for (i = 0; i < 13; i++)
gprs[i] = 1;
gprs[1] = _Unwind_GetCFA (context);
for (; i < 32; i++)
gprs[i] = _Unwind_GetGR (context, i);
cr = _Unwind_GetGR (context, CR2_REGNO);
/* For each supported Libc, we have to track the code flow
all the way back into the kernel.
This code is believed to support all released Libc/Libsystem builds since
Jaguar 6C115, including all the security updates. To be precise,
Libc Libsystem Build(s)
262~1 60~37 6C115
262~1 60.2~4 6D52
262~1 61~3 6F21-6F22
262~1 63~24 6G30-6G37
262~1 63~32 6I34-6I35
262~1 63~64 6L29-6L60
262.4.1~1 63~84 6L123-6R172
320~1 71~101 7B85-7D28
320~1 71~266 7F54-7F56
320~1 71~288 7F112
320~1 71~289 7F113
320.1.3~1 71.1.1~29 7H60-7H105
320.1.3~1 71.1.1~30 7H110-7H113
320.1.3~1 71.1.1~31 7H114
That's a big table! It would be insane to try to keep track of
every little detail, so we just read the code itself and do what
it would do.
*/
for (;;)
{
uint32_t ins = *pc++;
if ((ins & 0xFC000003) == 0x48000000) /* b instruction */
{
pc += ((((int32_t) ins & 0x3FFFFFC) ^ 0x2000000) - 0x2000004) / 4;
continue;
}
if ((ins & 0xFC600000) == 0x2C000000) /* cmpwi */
{
int32_t val1 = (int16_t) ins;
int32_t val2 = gprs[ins >> 16 & 0x1F];
/* Only beq and bne instructions are supported, so we only
need to set the EQ bit. */
uint32_t mask = 0xF << ((ins >> 21 & 0x1C) ^ 0x1C);
if (val1 == val2)
cr |= mask;
else
cr &= ~mask;
continue;
}
if ((ins & 0xFEC38003) == 0x40820000) /* forwards beq/bne */
{
if ((cr >> ((ins >> 16 & 0x1F) ^ 0x1F) & 1) == (ins >> 24 & 1))
pc += (ins & 0x7FFC) / 4 - 1;
continue;
}
if ((ins & 0xFC0007FF) == 0x7C000378) /* or, including mr */
{
gprs [ins >> 16 & 0x1F] = (gprs [ins >> 11 & 0x1F]
| gprs [ins >> 21 & 0x1F]);
continue;
}
if (ins >> 26 == 0x0E) /* addi, including li */
{
reg_unit src = (ins >> 16 & 0x1F) == 0 ? 0 : gprs [ins >> 16 & 0x1F];
gprs [ins >> 21 & 0x1F] = src + (int16_t) ins;
continue;
}
if (ins >> 26 == 0x0F) /* addis, including lis */
{
reg_unit src = (ins >> 16 & 0x1F) == 0 ? 0 : gprs [ins >> 16 & 0x1F];
gprs [ins >> 21 & 0x1F] = src + ((int16_t) ins << 16);
continue;
}
if (ins >> 26 == 0x20) /* lwz */
{
reg_unit src = (ins >> 16 & 0x1F) == 0 ? 0 : gprs [ins >> 16 & 0x1F];
uint32_t *p = (uint32_t *)(src + (int16_t) ins);
if (p == invalid_address)
return false;
gprs [ins >> 21 & 0x1F] = *p;
continue;
}
if (ins >> 26 == 0x21) /* lwzu */
{
uint32_t *p = (uint32_t *)(gprs [ins >> 16 & 0x1F] += (int16_t) ins);
if (p == invalid_address)
return false;
gprs [ins >> 21 & 0x1F] = *p;
continue;
}
if (ins >> 26 == 0x24) /* stw */
/* What we hope this is doing is '--in_sigtramp'. We don't want
to actually store to memory, so just make a note of the
address and refuse to load from it. */
{
reg_unit src = (ins >> 16 & 0x1F) == 0 ? 0 : gprs [ins >> 16 & 0x1F];
uint32_t *p = (uint32_t *)(src + (int16_t) ins);
if (p == NULL || invalid_address != NULL)
return false;
invalid_address = p;
continue;
}
if (ins >> 26 == 0x2E) /* lmw */
{
reg_unit src = (ins >> 16 & 0x1F) == 0 ? 0 : gprs [ins >> 16 & 0x1F];
uint32_t *p = (uint32_t *)(src + (int16_t) ins);
int i;
for (i = (ins >> 21 & 0x1F); i < 32; i++)
{
if (p == invalid_address)
return false;
gprs[i] = *p++;
}
continue;
}
if ((ins & 0xFC1FFFFF) == 0x7c0803a6) /* mtlr */
{
lr = gprs [ins >> 21 & 0x1F];
continue;
}
if ((ins & 0xFC1FFFFF) == 0x7c0802a6) /* mflr */
{
gprs [ins >> 21 & 0x1F] = lr;
continue;
}
if ((ins & 0xFC1FFFFF) == 0x7c0903a6) /* mtctr */
{
ctr = gprs [ins >> 21 & 0x1F];
continue;
}
/* The PowerPC User's Manual says that bit 11 of the mtcrf
instruction is reserved and should be set to zero, but it
looks like the Darwin assembler doesn't do that... */
if ((ins & 0xFC000FFF) == 0x7c000120) /* mtcrf */
{
int i;
uint32_t mask = 0;
for (i = 0; i < 8; i++)
mask |= ((-(ins >> (12 + i) & 1)) & 0xF) << 4 * i;
cr = (cr & ~mask) | (gprs [ins >> 21 & 0x1F] & mask);
continue;
}
if (ins == 0x429f0005) /* bcl- 20,4*cr7+so,.+4, loads pc into LR */
{
lr = (reg_unit) pc;
continue;
}
if (ins == 0x4e800420) /* bctr */
{
pc = (uint32_t *) ctr;
continue;
}
if (ins == 0x44000002) /* sc */
return true;
return false;
}
}
/* These defines are from the kernel's bsd/dev/ppc/unix_signal.c. */
#define UC_TRAD 1
#define UC_TRAD_VEC 6
#define UC_TRAD64 20
#define UC_TRAD64_VEC 25
#define UC_FLAVOR 30
#define UC_FLAVOR_VEC 35
#define UC_FLAVOR64 40
#define UC_FLAVOR64_VEC 45
#define UC_DUAL 50
#define UC_DUAL_VEC 55
/* These are based on /usr/include/ppc/ucontext.h and
/usr/include/mach/ppc/thread_status.h, but rewritten to be more
convenient, to compile on Jaguar, and to work around Radar 3712064
on Panther, which is that the 'es' field of 'struct mcontext64' has
the wrong type (doh!). */
struct gcc_mcontext64 {
uint64_t dar;
uint32_t dsisr;
uint32_t exception;
uint32_t padding1[4];
uint64_t srr0;
uint64_t srr1;
uint32_t gpr[32][2];
uint32_t cr;
uint32_t xer[2]; /* These are arrays because the original structure has them misaligned. */
uint32_t lr[2];
uint32_t ctr[2];
uint32_t vrsave;
ppc_float_state_t fs;
ppc_vector_state_t vs;
};
#define UC_FLAVOR_SIZE \
(sizeof (struct mcontext) - sizeof (ppc_vector_state_t))
#define UC_FLAVOR_VEC_SIZE (sizeof (struct mcontext))
#define UC_FLAVOR64_SIZE \
(sizeof (struct gcc_mcontext64) - sizeof (ppc_vector_state_t))
#define UC_FLAVOR64_VEC_SIZE (sizeof (struct gcc_mcontext64))
/* Given GPRS as input to a 'sc' instruction, and OLD_CFA, update FS
to represent the execution of a signal return; or, if not a signal
return, return false. */
static bool
handle_syscall (_Unwind_FrameState *fs, const reg_unit gprs[32],
_Unwind_Ptr old_cfa)
{
struct ucontext *uctx;
bool is_64, is_vector;
ppc_float_state_t *float_state;
ppc_vector_state_t *vector_state;
_Unwind_Ptr new_cfa;
int i;
static _Unwind_Ptr return_addr;
/* Yay! We're in a Libc that we understand, and it's made a
system call. It'll be one of two kinds: either a Jaguar-style
SYS_sigreturn, or a Panther-style 'syscall' call with 184, which
is also SYS_sigreturn. */
if (gprs[0] == 0x67 /* SYS_SIGRETURN */)
{
uctx = (struct ucontext *) gprs[3];
is_vector = (uctx->uc_mcsize == UC_FLAVOR64_VEC_SIZE
|| uctx->uc_mcsize == UC_FLAVOR_VEC_SIZE);
is_64 = (uctx->uc_mcsize == UC_FLAVOR64_VEC_SIZE
|| uctx->uc_mcsize == UC_FLAVOR64_SIZE);
}
else if (gprs[0] == 0 && gprs[3] == 184)
{
int ctxstyle = gprs[5];
uctx = (struct ucontext *) gprs[4];
is_vector = (ctxstyle == UC_FLAVOR_VEC || ctxstyle == UC_FLAVOR64_VEC
|| ctxstyle == UC_TRAD_VEC || ctxstyle == UC_TRAD64_VEC);
is_64 = (ctxstyle == UC_FLAVOR64_VEC || ctxstyle == UC_TRAD64_VEC
|| ctxstyle == UC_FLAVOR64 || ctxstyle == UC_TRAD64);
}
else
return false;
#define set_offset(r, addr) \
(fs->regs.reg[r].how = REG_SAVED_OFFSET, \
fs->regs.reg[r].loc.offset = (_Unwind_Ptr)(addr) - new_cfa)
/* Restore even the registers that are not call-saved, since they
might be being used in the prologue to save other registers,
for instance GPR0 is sometimes used to save LR. */
/* Handle the GPRs, and produce the information needed to do the rest. */
if (is_64)
{
/* The context is 64-bit, but it doesn't carry any extra information
for us because only the low 32 bits of the registers are
call-saved. */
struct gcc_mcontext64 *m64 = (struct gcc_mcontext64 *)uctx->uc_mcontext;
int i;
float_state = &m64->fs;
vector_state = &m64->vs;
new_cfa = m64->gpr[1][1];
set_offset (CR2_REGNO, &m64->cr);
for (i = 0; i < 32; i++)
set_offset (i, m64->gpr[i] + 1);
set_offset (XER_REGNO, m64->xer + 1);
set_offset (LINK_REGISTER_REGNUM, m64->lr + 1);
set_offset (COUNT_REGISTER_REGNUM, m64->ctr + 1);
if (is_vector)
set_offset (VRSAVE_REGNO, &m64->vrsave);
/* Sometimes, srr0 points to the instruction that caused the exception,
and sometimes to the next instruction to be executed; we want
the latter. */
if (m64->exception == 3 || m64->exception == 4
|| m64->exception == 6
|| (m64->exception == 7 && !(m64->srr1 & 0x10000)))
return_addr = m64->srr0 + 4;
else
return_addr = m64->srr0;
}
else
{
struct mcontext *m = uctx->uc_mcontext;
int i;
float_state = &m->fs;
vector_state = &m->vs;
new_cfa = m->ss.r1;
set_offset (CR2_REGNO, &m->ss.cr);
for (i = 0; i < 32; i++)
set_offset (i, &m->ss.r0 + i);
set_offset (XER_REGNO, &m->ss.xer);
set_offset (LINK_REGISTER_REGNUM, &m->ss.lr);
set_offset (COUNT_REGISTER_REGNUM, &m->ss.ctr);
if (is_vector)
set_offset (VRSAVE_REGNO, &m->ss.vrsave);
/* Sometimes, srr0 points to the instruction that caused the exception,
and sometimes to the next instruction to be executed; we want
the latter. */
if (m->es.exception == 3 || m->es.exception == 4
|| m->es.exception == 6
|| (m->es.exception == 7 && !(m->ss.srr1 & 0x10000)))
return_addr = m->ss.srr0 + 4;
else
return_addr = m->ss.srr0;
}
fs->cfa_how = CFA_REG_OFFSET;
fs->cfa_reg = STACK_POINTER_REGNUM;
fs->cfa_offset = new_cfa - old_cfa;;
/* The choice of column for the return address is somewhat tricky.
Fortunately, the actual choice is private to this file, and
the space it's reserved from is the GCC register space, not the
DWARF2 numbering. So any free element of the right size is an OK
choice. Thus: */
fs->retaddr_column = ARG_POINTER_REGNUM;
/* FIXME: this should really be done using a DWARF2 location expression,
not using a static variable. In fact, this entire file should
be implemented in DWARF2 expressions. */
set_offset (ARG_POINTER_REGNUM, &return_addr);
for (i = 0; i < 32; i++)
set_offset (32 + i, float_state->fpregs + i);
set_offset (SPEFSCR_REGNO, &float_state->fpscr);
if (is_vector)
{
for (i = 0; i < 32; i++)
set_offset (FIRST_ALTIVEC_REGNO + i, vector_state->save_vr + i);
set_offset (VSCR_REGNO, vector_state->save_vscr);
}
return true;
}
/* This is also prototyped in rs6000/darwin.h, inside the
MD_FALLBACK_FRAME_STATE_FOR macro. */
extern bool _Unwind_fallback_frame_state_for (struct _Unwind_Context *context,
_Unwind_FrameState *fs);
/* Implement the MD_FALLBACK_FRAME_STATE_FOR macro,
returning true iff the frame was a sigreturn() frame that we
can understand. */
bool
_Unwind_fallback_frame_state_for (struct _Unwind_Context *context,
_Unwind_FrameState *fs)
{
reg_unit gprs[32];
if (!interpret_libc (gprs, context))
return false;
return handle_syscall (fs, gprs, _Unwind_GetCFA (context));
}

14
gcc/config/rs6000/darwin.h
View File

@ -327,3 +327,17 @@ do { \
#undef REGISTER_TARGET_PRAGMAS
#define REGISTER_TARGET_PRAGMAS DARWIN_REGISTER_TARGET_PRAGMAS
#ifdef IN_LIBGCC2
#include <stdbool.h>
#endif
#define MD_FALLBACK_FRAME_STATE_FOR(CONTEXT, FS, SUCCESS) \
{ \
extern bool _Unwind_fallback_frame_state_for \
(struct _Unwind_Context *context, _Unwind_FrameState *fs); \
\
if (_Unwind_fallback_frame_state_for (CONTEXT, FS)) \
goto SUCCESS; \
}
#define HAS_MD_FALLBACK_FRAME_STATE_FOR 1

67
gcc/config/rs6000/rs6000.c
View File

@ -12298,14 +12298,31 @@ rs6000_emit_prologue (void)
/* If we use the link register, get it into r0. */
if (info->lr_save_p)
emit_move_insn (gen_rtx_REG (Pmode, 0),
gen_rtx_REG (Pmode, LINK_REGISTER_REGNUM));
{
insn = emit_move_insn (gen_rtx_REG (Pmode, 0),
gen_rtx_REG (Pmode, LINK_REGISTER_REGNUM));
RTX_FRAME_RELATED_P (insn) = 1;
}
/* If we need to save CR, put it into r12. */
if (info->cr_save_p && frame_reg_rtx != frame_ptr_rtx)
{
rtx set;
cr_save_rtx = gen_rtx_REG (SImode, 12);
emit_insn (gen_movesi_from_cr (cr_save_rtx));
insn = emit_insn (gen_movesi_from_cr (cr_save_rtx));
RTX_FRAME_RELATED_P (insn) = 1;
/* Now, there's no way that dwarf2out_frame_debug_expr is going
to understand '(unspec:SI [(reg:CC 68) ...] UNSPEC_MOVESI_FROM_CR)'.
But that's OK. All we have to do is specify that _one_ condition
code register is saved in this stack slot. The thrower's epilogue
will then restore all the call-saved registers.
We use CR2_REGNO (70) to be compatible with gcc-2.95 on Linux. */
set = gen_rtx_SET (VOIDmode, cr_save_rtx,
gen_rtx_REG (SImode, CR2_REGNO));
REG_NOTES (insn) = gen_rtx_EXPR_LIST (REG_FRAME_RELATED_EXPR,
set,
REG_NOTES (insn));
}
/* Do any required saving of fpr's. If only one or two to save, do
@ -12484,7 +12501,7 @@ rs6000_emit_prologue (void)
insn = emit_move_insn (mem, reg);
rs6000_frame_related (insn, frame_ptr_rtx, info->total_size,
reg, gen_rtx_REG (Pmode, LINK_REGISTER_REGNUM));
NULL_RTX, NULL_RTX);
}
/* Save CR if we use any that must be preserved. */
@ -12493,6 +12510,8 @@ rs6000_emit_prologue (void)
rtx addr = gen_rtx_PLUS (Pmode, frame_reg_rtx,
GEN_INT (info->cr_save_offset + sp_offset));
rtx mem = gen_rtx_MEM (SImode, addr);
/* See the large comment above about why CR2_REGNO is used. */
rtx magic_eh_cr_reg = gen_rtx_REG (SImode, CR2_REGNO);
set_mem_alias_set (mem, rs6000_sr_alias_set);
@ -12500,19 +12519,21 @@ rs6000_emit_prologue (void)
that it's free. */
if (REGNO (frame_reg_rtx) == 12)
{
rtx set;
cr_save_rtx = gen_rtx_REG (SImode, 0);
emit_insn (gen_movesi_from_cr (cr_save_rtx));
insn = emit_insn (gen_movesi_from_cr (cr_save_rtx));
RTX_FRAME_RELATED_P (insn) = 1;
set = gen_rtx_SET (VOIDmode, cr_save_rtx, magic_eh_cr_reg);
REG_NOTES (insn) = gen_rtx_EXPR_LIST (REG_FRAME_RELATED_EXPR,
set,
REG_NOTES (insn));
}
insn = emit_move_insn (mem, cr_save_rtx);
/* Now, there's no way that dwarf2out_frame_debug_expr is going
to understand '(unspec:SI [(reg:CC 68) ...] UNSPEC_MOVESI_FROM_CR)'.
But that's OK. All we have to do is specify that _one_ condition
code register is saved in this stack slot. The thrower's epilogue
will then restore all the call-saved registers.
We use CR2_REGNO (70) to be compatible with gcc-2.95 on Linux. */
rs6000_frame_related (insn, frame_ptr_rtx, info->total_size,
cr_save_rtx, gen_rtx_REG (SImode, CR2_REGNO));
NULL_RTX, NULL_RTX);
}
/* Update stack and set back pointer unless this is V.4,
@ -12546,9 +12567,16 @@ rs6000_emit_prologue (void)
if (save_LR_around_toc_setup)
{
rtx lr = gen_rtx_REG (Pmode, LINK_REGISTER_REGNUM);
rs6000_maybe_dead (emit_move_insn (frame_ptr_rtx, lr));
insn = emit_move_insn (frame_ptr_rtx, lr);
rs6000_maybe_dead (insn);
RTX_FRAME_RELATED_P (insn) = 1;
rs6000_emit_load_toc_table (TRUE);
rs6000_maybe_dead (emit_move_insn (lr, frame_ptr_rtx));
insn = emit_move_insn (lr, frame_ptr_rtx);
rs6000_maybe_dead (insn);
RTX_FRAME_RELATED_P (insn) = 1;
}
else
rs6000_emit_load_toc_table (TRUE);
@ -12558,15 +12586,16 @@ rs6000_emit_prologue (void)
if (DEFAULT_ABI == ABI_DARWIN
&& flag_pic && current_function_uses_pic_offset_table)
{
rtx dest = gen_rtx_REG (Pmode, LINK_REGISTER_REGNUM);
rtx lr = gen_rtx_REG (Pmode, LINK_REGISTER_REGNUM);
const char *picbase = machopic_function_base_name ();
rtx src = gen_rtx_SYMBOL_REF (Pmode, picbase);
rs6000_maybe_dead (emit_insn (gen_load_macho_picbase (dest, src)));
rs6000_maybe_dead (emit_insn (gen_load_macho_picbase (lr, src)));
rs6000_maybe_dead (
emit_move_insn (gen_rtx_REG (Pmode, RS6000_PIC_OFFSET_TABLE_REGNUM),
gen_rtx_REG (Pmode, LINK_REGISTER_REGNUM)));
insn = emit_move_insn (gen_rtx_REG (Pmode,
RS6000_PIC_OFFSET_TABLE_REGNUM),
lr);
rs6000_maybe_dead (insn);
}
#endif
}

4
gcc/config/rs6000/t-darwin
View File

@ -1,6 +1,6 @@
# Add trampoline and long double support to libgcc.
LIB2FUNCS_EXTRA = $(srcdir)/config/rs6000/darwin-tramp.asm \
$(srcdir)/config/rs6000/darwin-ldouble.c
$(srcdir)/config/rs6000/darwin-ldouble.c \
$(srcdir)/config/rs6000/darwin-fallback.c
LIB2FUNCS_STATIC_EXTRA = \
$(srcdir)/config/rs6000/darwin-fpsave.asm \

176
gcc/dwarf2out.c
View File

@ -359,7 +359,6 @@ static HOST_WIDE_INT stack_adjust_offset (rtx);
static void output_cfi (dw_cfi_ref, dw_fde_ref, int);
static void output_call_frame_info (int);
static void dwarf2out_stack_adjust (rtx);
static void queue_reg_save (const char *, rtx, HOST_WIDE_INT);
static void flush_queued_reg_saves (void);
static bool clobbers_queued_reg_save (rtx);
static void dwarf2out_frame_debug_expr (rtx, const char *);
@ -843,8 +842,7 @@ reg_save (const char *label, unsigned int reg, unsigned int sreg, HOST_WIDE_INT
cfi->dw_cfi_oprnd2.dw_cfi_offset = offset;
}
else if (sreg == reg)
/* We could emit a DW_CFA_same_value in this case, but don't bother. */
return;
cfi->dw_cfi_opc = DW_CFA_same_value;
else
{
cfi->dw_cfi_opc = DW_CFA_register;
@ -974,7 +972,8 @@ initial_return_save (rtx rtl)
abort ();
}
reg_save (NULL, DWARF_FRAME_RETURN_COLUMN, reg, offset - cfa.offset);
if (reg != DWARF_FRAME_RETURN_COLUMN)
reg_save (NULL, DWARF_FRAME_RETURN_COLUMN, reg, offset - cfa.offset);
}
/* Given a SET, calculate the amount of stack adjustment it
@ -1144,53 +1143,134 @@ struct queued_reg_save GTY(())
struct queued_reg_save *next;
rtx reg;
HOST_WIDE_INT cfa_offset;
rtx saved_reg;
};
static GTY(()) struct queued_reg_save *queued_reg_saves;
/* The caller's ORIG_REG is saved in SAVED_IN_REG. */
struct reg_saved_in_data GTY(()) {
rtx orig_reg;
rtx saved_in_reg;
};
/* A list of registers saved in other registers.
The list intentionally has a small maximum capacity of 4; if your
port needs more than that, you might consider implementing a
more efficient data structure. */
static GTY(()) struct reg_saved_in_data regs_saved_in_regs[4];
static GTY(()) size_t num_regs_saved_in_regs;
#if defined (DWARF2_DEBUGGING_INFO) || defined (DWARF2_UNWIND_INFO)
static const char *last_reg_save_label;
static void
queue_reg_save (const char *label, rtx reg, HOST_WIDE_INT offset)
{
struct queued_reg_save *q = ggc_alloc (sizeof (*q));
/* Add an entry to QUEUED_REG_SAVES saying that REG is now saved at
SREG, or if SREG is NULL then it is saved at OFFSET to the CFA. */
static void
queue_reg_save (const char *label, rtx reg, rtx sreg, HOST_WIDE_INT offset)
{
struct queued_reg_save *q;
/* Duplicates waste space, but it's also necessary to remove them
for correctness, since the queue gets output in reverse
order. */
for (q = queued_reg_saves; q != NULL; q = q->next)
if (REGNO (q->reg) == REGNO (reg))
break;
if (q == NULL)
{
q = ggc_alloc (sizeof (*q));
q->next = queued_reg_saves;
queued_reg_saves = q;
}
q->next = queued_reg_saves;
q->reg = reg;
q->cfa_offset = offset;
queued_reg_saves = q;
q->saved_reg = sreg;
last_reg_save_label = label;
}
/* Output all the entries in QUEUED_REG_SAVES. */
static void
flush_queued_reg_saves (void)
{
struct queued_reg_save *q, *next;
struct queued_reg_save *q;
for (q = queued_reg_saves; q; q = next)
for (q = queued_reg_saves; q; q = q->next)
{
dwarf2out_reg_save (last_reg_save_label, REGNO (q->reg), q->cfa_offset);
next = q->next;
size_t i;
for (i = 0; i < num_regs_saved_in_regs; i++)
if (REGNO (regs_saved_in_regs[i].orig_reg) == REGNO (q->reg))
break;
if (q->saved_reg && i == num_regs_saved_in_regs)
{
if (i == ARRAY_SIZE (regs_saved_in_regs))
abort ();
num_regs_saved_in_regs++;
}
if (i != num_regs_saved_in_regs)
{
regs_saved_in_regs[i].orig_reg = q->reg;
regs_saved_in_regs[i].saved_in_reg = q->saved_reg;
}
reg_save (last_reg_save_label, REGNO (q->reg),
q->saved_reg ? REGNO (q->saved_reg) : -1U, q->cfa_offset);
}
queued_reg_saves = NULL;
last_reg_save_label = NULL;
}
/* Does INSN clobber any register which QUEUED_REG_SAVES lists a saved
location for? Or, does it clobber a register which we've previously
said that some other register is saved in, and for which we now
have a new location for? */
static bool
clobbers_queued_reg_save (rtx insn)
{
struct queued_reg_save *q;
for (q = queued_reg_saves; q; q = q->next)
if (modified_in_p (q->reg, insn))
return true;
{
size_t i;
if (modified_in_p (q->reg, insn))
return true;
for (i = 0; i < num_regs_saved_in_regs; i++)
if (REGNO (q->reg) == REGNO (regs_saved_in_regs[i].orig_reg)
&& modified_in_p (regs_saved_in_regs[i].saved_in_reg, insn))
return true;
}
return false;
}
/* What register, if any, is currently saved in REG? */
static rtx
reg_saved_in (rtx reg)
{
unsigned int regn = REGNO (reg);
size_t i;
struct queued_reg_save *q;
for (q = queued_reg_saves; q; q = q->next)
if (q->saved_reg && regn == REGNO (q->saved_reg))
return q->reg;
for (i = 0; i < num_regs_saved_in_regs; i++)
if (regs_saved_in_regs[i].saved_in_reg
&& regn == REGNO (regs_saved_in_regs[i].saved_in_reg))
return regs_saved_in_regs[i].orig_reg;
return NULL_RTX;
}
/* A temporary register holding an integral value used in adjusting SP
or setting up the store_reg. The "offset" field holds the integer
@ -1199,8 +1279,8 @@ static dw_cfa_location cfa_temp;
/* Record call frame debugging information for an expression EXPR,
which either sets SP or FP (adjusting how we calculate the frame
address) or saves a register to the stack. LABEL indicates the
address of EXPR.
address) or saves a register to the stack or another register.
LABEL indicates the address of EXPR.
This function encodes a state machine mapping rtxes to actions on
cfa, cfa_store, and cfa_temp.reg. We describe these rules so
@ -1224,12 +1304,20 @@ static dw_cfa_location cfa_temp;
RTX_FRAME_RELATED_P is set on an insn which modifies memory, it's a
register save, and the register used to calculate the destination
had better be the one we think we're using for this purpose.
It's also assumed that a copy from a call-saved register to another
register is saving that register if RTX_FRAME_RELATED_P is set on
that instruction. If the copy is from a call-saved register to
the *same* register, that means that the register is now the same
value as in the caller.
Except: If the register being saved is the CFA register, and the
offset is nonzero, we are saving the CFA, so we assume we have to
use DW_CFA_def_cfa_expression. If the offset is 0, we assume that
the intent is to save the value of SP from the previous frame.
In addition, if a register has previously been saved to a different
register,
Invariants / Summaries of Rules
cfa current rule for calculating the CFA. It usually
@ -1380,29 +1468,42 @@ dwarf2out_frame_debug_expr (rtx expr, const char *label)
src = SET_SRC (expr);
dest = SET_DEST (expr);
if (GET_CODE (src) == REG)
{
rtx rsi = reg_saved_in (src);
if (rsi)
src = rsi;
}
switch (GET_CODE (dest))
{
case REG:
/* Rule 1 */
/* Update the CFA rule wrt SP or FP. Make sure src is
relative to the current CFA register. */
switch (GET_CODE (src))
{
/* Setting FP from SP. */
case REG:
if (cfa.reg == (unsigned) REGNO (src))
/* OK. */
;
{
/* Rule 1 */
/* Update the CFA rule wrt SP or FP. Make sure src is
relative to the current CFA register.
We used to require that dest be either SP or FP, but the
ARM copies SP to a temporary register, and from there to
FP. So we just rely on the backends to only set
RTX_FRAME_RELATED_P on appropriate insns. */
cfa.reg = REGNO (dest);
cfa_temp.reg = cfa.reg;
cfa_temp.offset = cfa.offset;
}
else if (call_used_regs [REGNO (dest)]
&& ! fixed_regs [REGNO (dest)])
{
/* Saving a register in a register. */
queue_reg_save (label, src, dest, 0);
}
else
abort ();
/* We used to require that dest be either SP or FP, but the
ARM copies SP to a temporary register, and from there to
FP. So we just rely on the backends to only set
RTX_FRAME_RELATED_P on appropriate insns. */
cfa.reg = REGNO (dest);
cfa_temp.reg = cfa.reg;
cfa_temp.offset = cfa.offset;
break;
case PLUS:
@ -1642,7 +1743,7 @@ dwarf2out_frame_debug_expr (rtx expr, const char *label)
we're saving SP like any other register; this happens
on the ARM. */
def_cfa_1 (label, &cfa);
queue_reg_save (label, stack_pointer_rtx, offset);
queue_reg_save (label, stack_pointer_rtx, NULL_RTX, offset);
break;
}
else
@ -1665,7 +1766,7 @@ dwarf2out_frame_debug_expr (rtx expr, const char *label)
}
def_cfa_1 (label, &cfa);
queue_reg_save (label, src, offset);
queue_reg_save (label, src, NULL_RTX, offset);
break;
default:
@ -1685,6 +1786,8 @@ dwarf2out_frame_debug (rtx insn)
if (insn == NULL_RTX)
{
size_t i;
/* Flush any queued register saves. */
flush_queued_reg_saves ();
@ -1697,6 +1800,13 @@ dwarf2out_frame_debug (rtx insn)
cfa_store = cfa;
cfa_temp.reg = -1;
cfa_temp.offset = 0;
for (i = 0; i < num_regs_saved_in_regs; i++)
{
regs_saved_in_regs[i].orig_reg = NULL_RTX;
regs_saved_in_regs[i].saved_in_reg = NULL_RTX;
}
num_regs_saved_in_regs = 0;
return;
}

11
gcc/testsuite/ChangeLog
View File

@ -1,3 +1,14 @@
2004-06-26 Geoffrey Keating <geoffk@apple.com>
Andreas Tobler <a.tobler@schweiz.ch>
* gcc.dg/cleanup-10.c: Run on all Linux platforms and powerpc-darwin.
Use SA_RESETHAND rather than SA_ONESHOT. Trap SIGBUS as well
as SIGSEGV.
* gcc.dg/cleanup-11.c: Likewise.
* gcc.dg/cleanup-8.c: Likewise.
* gcc.dg/cleanup-9.c: Likewise.
* gcc.dg/cleanup-5.c: Run on all platforms.
2004-06-30 Joseph S. Myers <jsm@polyomino.org.uk>
* g++.dg/warn/nonnull1.C: New test.

5
gcc/testsuite/gcc.dg/cleanup-10.c
View File

@ -1,4 +1,4 @@
/* { dg-do run { target i?86-*-linux* x86_64-*-linux* ia64-*-linux* alpha*-*-linux* powerpc*-*-linux* s390*-*-linux* sparc*-*-linux* mips*-*-linux* } } */
/* { dg-do run { target *-*-linux* powerpc*-*-darwin* } } */
/* { dg-options "-fasynchronous-unwind-tables -fexceptions -O2" } */
/* Verify that cleanups work with exception handling through signal frames
on alternate stack. */
@ -93,8 +93,9 @@ static int __attribute__((noinline)) fn1 ()
sigemptyset (&s.sa_mask);
s.sa_sigaction = fn4;
s.sa_flags = SA_ONESHOT | SA_ONSTACK;
s.sa_flags = SA_RESETHAND | SA_ONSTACK;
sigaction (SIGSEGV, &s, NULL);
sigaction (SIGBUS, &s, NULL);
fn2 ();
return 0;
}

5
gcc/testsuite/gcc.dg/cleanup-11.c
View File

@ -1,4 +1,4 @@
/* { dg-do run { target i?86-*-linux* x86_64-*-linux* ia64-*-linux* alpha*-*-linux* powerpc*-*-linux* s390*-*-linux* sparc*-*-linux* mips*-*-linux* } } */
/* { dg-do run { target *-*-linux* powerpc*-*-darwin* } } */
/* { dg-options "-fasynchronous-unwind-tables -fexceptions -O2" } */
/* Verify that cleanups work with exception handling through realtime signal
frames on alternate stack. */
@ -93,8 +93,9 @@ static int __attribute__((noinline)) fn1 ()
sigemptyset (&s.sa_mask);
s.sa_sigaction = fn4;
s.sa_flags = SA_ONESHOT | SA_ONSTACK | SA_SIGINFO;
s.sa_flags = SA_RESETHAND | SA_ONSTACK | SA_SIGINFO;
sigaction (SIGSEGV, &s, NULL);
sigaction (SIGBUS, &s, NULL);
fn2 ();
return 0;
}

2
gcc/testsuite/gcc.dg/cleanup-5.c
View File

@ -1,4 +1,4 @@
/* { dg-do run { target i?86-*-linux* x86_64-*-linux* ia64-*-linux* alpha*-*-linux* powerpc*-*-linux* s390*-*-linux* sparc*-*-linux* mips*-*-linux* } } */
/* { dg-do run } */
/* { dg-options "-fexceptions" } */
/* Verify that cleanups work with exception handling. */

3
gcc/testsuite/gcc.dg/cleanup-8.c
View File

@ -1,4 +1,4 @@
/* { dg-do run { target i?86-*-linux* x86_64-*-linux* ia64-*-linux* alpha*-*-linux* powerpc*-*-linux* s390*-*-linux* sparc*-*-linux* } } */
/* { dg-do run { target *-*-linux* powerpc*-*-darwin* } } */
/* { dg-options "-fasynchronous-unwind-tables -fexceptions -O2" } */
/* Verify that cleanups work with exception handling through signal
frames. */
@ -78,6 +78,7 @@ static int __attribute__((noinline)) fn2 ()
static int __attribute__((noinline)) fn1 ()
{
signal (SIGSEGV, fn4);
signal (SIGBUS, fn4);
fn2 ();
return 0;
}

5
gcc/testsuite/gcc.dg/cleanup-9.c
View File

@ -1,4 +1,4 @@
/* { dg-do run { target i?86-*-linux* x86_64-*-linux* ia64-*-linux* alpha*-*-linux* powerpc*-*-linux* s390*-*-linux* sparc*-*-linux* mips*-*-linux* } } */
/* { dg-do run { target *-*-linux* powerpc*-*-darwin* } } */
/* { dg-options "-fasynchronous-unwind-tables -fexceptions -O2" } */
/* Verify that cleanups work with exception handling through realtime
signal frames. */
@ -80,8 +80,9 @@ static int __attribute__((noinline)) fn1 ()
struct sigaction s;
sigemptyset (&s.sa_mask);
s.sa_sigaction = fn4;
s.sa_flags = SA_ONESHOT | SA_SIGINFO;
s.sa_flags = SA_RESETHAND | SA_SIGINFO;
sigaction (SIGSEGV, &s, NULL);
sigaction (SIGBUS, &s, NULL);
fn2 ();
return 0;
}

63
gcc/unwind-dw2.c
View File

@ -40,7 +40,7 @@
#include "unwind-pe.h"
#include "unwind-dw2-fde.h"
#include "gthr.h"
#include "unwind-dw2.h"
#ifndef __USING_SJLJ_EXCEPTIONS__
@ -51,12 +51,6 @@
#define STACK_GROWS_DOWNWARD 1
#endif
/* A target can override (perhaps for backward compatibility) how
many dwarf2 columns are unwound. */
#ifndef DWARF_FRAME_REGISTERS
#define DWARF_FRAME_REGISTERS FIRST_PSEUDO_REGISTER
#endif
/* Dwarf frame registers used for pre gcc 3.0 compiled glibc. */
#ifndef PRE_GCC3_DWARF_FRAME_REGISTERS
#define PRE_GCC3_DWARF_FRAME_REGISTERS DWARF_FRAME_REGISTERS
@ -87,58 +81,6 @@ struct _Unwind_Context
/* Byte size of every register managed by these routines. */
static unsigned char dwarf_reg_size_table[DWARF_FRAME_REGISTERS+1];
/* The result of interpreting the frame unwind info for a frame.
This is all symbolic at this point, as none of the values can
be resolved until the target pc is located. */
typedef struct
{
/* Each register save state can be described in terms of a CFA slot,
another register, or a location expression. */
struct frame_state_reg_info
{
struct {
union {
_Unwind_Word reg;
_Unwind_Sword offset;
const unsigned char *exp;
} loc;
enum {
REG_UNSAVED,
REG_SAVED_OFFSET,
REG_SAVED_REG,
REG_SAVED_EXP
} how;
} reg[DWARF_FRAME_REGISTERS+1];
/* Used to implement DW_CFA_remember_state. */
struct frame_state_reg_info *prev;
} regs;
/* The CFA can be described in terms of a reg+offset or a
location expression. */
_Unwind_Sword cfa_offset;
_Unwind_Word cfa_reg;
const unsigned char *cfa_exp;
enum {
CFA_UNSET,
CFA_REG_OFFSET,
CFA_EXP
} cfa_how;
/* The PC described by the current frame state. */
void *pc;
/* The information we care about from the CIE/FDE. */
_Unwind_Personality_Fn personality;
_Unwind_Sword data_align;
_Unwind_Word code_align;
_Unwind_Word retaddr_column;
unsigned char fde_encoding;
unsigned char lsda_encoding;
unsigned char saw_z;
void *eh_ptr;
} _Unwind_FrameState;
/* Read unaligned data from the instruction buffer. */
@ -866,12 +808,15 @@ execute_cfa_program (const unsigned char *insn_ptr,
case DW_CFA_restore_extended:
insn_ptr = read_uleb128 (insn_ptr, &reg);
/* FIXME, this is wrong; the CIE might have said that the
register was saved somewhere. */
fs->regs.reg[DWARF_REG_TO_UNWIND_COLUMN(reg)].how = REG_UNSAVED;
break;
case DW_CFA_undefined:
case DW_CFA_same_value:
insn_ptr = read_uleb128 (insn_ptr, &reg);
fs->regs.reg[DWARF_REG_TO_UNWIND_COLUMN(reg)].how = REG_UNSAVED;
break;
case DW_CFA_nop:

88
gcc/unwind-dw2.h Normal file
View File

@ -0,0 +1,88 @@
/* DWARF2 frame unwind data structure.
Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003
Free Software Foundation, Inc.
This file is part of GCC.
GCC 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, or (at your option)
any later version.
In addition to the permissions in the GNU General Public License, the
Free Software Foundation gives you unlimited permission to link the
compiled version of this file into combinations with other programs,
and to distribute those combinations without any restriction coming
from the use of this file. (The General Public License restrictions
do apply in other respects; for example, they cover modification of
the file, and distribution when not linked into a combined
executable.)
GCC 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 GCC; see the file COPYING. If not, write to the Free
Software Foundation, 59 Temple Place - Suite 330, Boston, MA
02111-1307, USA. */
/* A target can override (perhaps for backward compatibility) how
many dwarf2 columns are unwound. */
#ifndef DWARF_FRAME_REGISTERS
#define DWARF_FRAME_REGISTERS FIRST_PSEUDO_REGISTER
#endif
/* The result of interpreting the frame unwind info for a frame.
This is all symbolic at this point, as none of the values can
be resolved until the target pc is located. */
typedef struct
{
/* Each register save state can be described in terms of a CFA slot,
another register, or a location expression. */
struct frame_state_reg_info
{
struct {
union {
_Unwind_Word reg;
_Unwind_Sword offset;
const unsigned char *exp;
} loc;
enum {
REG_UNSAVED,
REG_SAVED_OFFSET,
REG_SAVED_REG,
REG_SAVED_EXP
} how;
} reg[DWARF_FRAME_REGISTERS+1];
/* Used to implement DW_CFA_remember_state. */
struct frame_state_reg_info *prev;
} regs;
/* The CFA can be described in terms of a reg+offset or a
location expression. */
_Unwind_Sword cfa_offset;
_Unwind_Word cfa_reg;
const unsigned char *cfa_exp;
enum {
CFA_UNSET,
CFA_REG_OFFSET,
CFA_EXP
} cfa_how;
/* The PC described by the current frame state. */
void *pc;
/* The information we care about from the CIE/FDE. */
_Unwind_Personality_Fn personality;
_Unwind_Sword data_align;
_Unwind_Word code_align;
_Unwind_Word retaddr_column;
unsigned char fde_encoding;
unsigned char lsda_encoding;
unsigned char saw_z;
void *eh_ptr;
} _Unwind_FrameState;

9
libjava/ChangeLog
View File

@ -1,3 +1,12 @@
2004-06-26 Geoffrey Keating <geoffk@apple.com>
Andreas Tobler <a.tobler@schweiz.ch>
* configure.host (powerpc-*-darwin*): New case, define
can_unwind_signal.
* configure.in (*-*-darwin*): New case, point to darwin-signal.h.
* configure: Regenerate.
* include/darwin-signal.h: New.
2004-06-30 Jerry Quinn <jlquinn@optonline.net>
* java/beans/Statement.java (doExecute): Fix formatting.

3
libjava/configure vendored
View File

@ -8553,6 +8553,9 @@ case "${host}" in
mips*-*-linux*)
SIGNAL_HANDLER=include/mips-signal.h
;;
*-*-darwin*)
SIGNAL_HANDLER=include/darwin-signal.h
;;
*)
SIGNAL_HANDLER=include/default-signal.h
;;

4
libjava/configure.host
View File

@ -232,10 +232,10 @@ EOF
;;
esac
;;
*-*-darwin*)
powerpc*-*-darwin*)
enable_hash_synchronization_default=no
slow_pthread_self=
can_unwind_signal=no
can_unwind_signal=yes
;;
*-*-freebsd*)
slow_pthread_self=

3
libjava/configure.in
View File

@ -1205,6 +1205,9 @@ case "${host}" in
mips*-*-linux*)
SIGNAL_HANDLER=include/mips-signal.h
;;
*-*-darwin*)
SIGNAL_HANDLER=include/darwin-signal.h
;;
*)
SIGNAL_HANDLER=include/default-signal.h
;;

51
libjava/include/darwin-signal.h Normal file
View File

@ -0,0 +1,51 @@
/* darwin-signal.h - Catch runtime signals and turn them into exceptions,
on a Darwin system. */
/* Copyright (C) 2004 Free Software Foundation
This file is part of libgcj.
This software is copyrighted work licensed under the terms of the
Libgcj License. Please consult the file "LIBGCJ_LICENSE" for
details. */
/* This file is really more of a specification. The rest of the system
should be arranged so that this Just Works. */
#ifndef JAVA_SIGNAL_H
# define JAVA_SIGNAL_H 1
#include <sys/types.h>
#include <stdio.h>
#include <signal.h>
typedef void (* SIG_PF)(int);
# define HANDLE_SEGV 1
# undef HANDLE_FPE
# define SIGNAL_HANDLER(_name) \
static void _name (int _dummy __attribute__ ((unused)))
# define MAKE_THROW_FRAME(_exception)
# define INIT_SEGV \
do { \
struct sigaction sa; \
sa.sa_handler = catch_segv; \
sigemptyset (&sa.sa_mask); \
sa.sa_flags = SA_NODEFER; \
sigaction (SIGBUS, &sa, NULL); \
sigaction (SIGSEGV, &sa, NULL); \
} while (0)
# define INIT_FPE \
do { \
struct sigaction sa; \
sa.sa_handler = catch_fpe; \
sigemptyset (&sa.sa_mask); \
sa.sa_flags = SA_NODEFER; \
sigaction (SIGFPE, &sa, NULL); \
} while (0)
#endif /* JAVA_SIGNAL_H */