+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.
# 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
--- /dev/null
+/* 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));
+}
#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
/* 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
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. */
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);
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,
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);
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
}
-# 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 \
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 *);
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;
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
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;
+/* 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, HOST_WIDE_INT offset)
+queue_reg_save (const char *label, rtx reg, rtx sreg, HOST_WIDE_INT offset)
{
- struct queued_reg_save *q = ggc_alloc (sizeof (*q));
+ 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
/* 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
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
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:
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
}
def_cfa_1 (label, &cfa);
- queue_reg_save (label, src, offset);
+ queue_reg_save (label, src, NULL_RTX, offset);
break;
default:
if (insn == NULL_RTX)
{
+ size_t i;
+
/* Flush any queued register saves. */
flush_queued_reg_saves ();
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;
}
+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.
-/* { 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. */
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;
}
-/* { 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. */
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;
}
-/* { 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. */
-/* { 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. */
static int __attribute__((noinline)) fn1 ()
{
signal (SIGSEGV, fn4);
+ signal (SIGBUS, fn4);
fn2 ();
return 0;
}
-/* { 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. */
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;
}
#include "unwind-pe.h"
#include "unwind-dw2-fde.h"
#include "gthr.h"
-
+#include "unwind-dw2.h"
#ifndef __USING_SJLJ_EXCEPTIONS__
#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
/* Byte size of every register managed by these routines. */
static unsigned char dwarf_reg_size_table[DWARF_FRAME_REGISTERS+1];
-\f
-/* 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;
\f
/* Read unaligned data from the instruction buffer. */
case DW_CFA_restore_extended:
insn_ptr = read_uleb128 (insn_ptr, ®);
+ /* 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, ®);
+ fs->regs.reg[DWARF_REG_TO_UNWIND_COLUMN(reg)].how = REG_UNSAVED;
break;
case DW_CFA_nop:
--- /dev/null
+/* 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;
+
+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.
mips*-*-linux*)
SIGNAL_HANDLER=include/mips-signal.h
;;
+ *-*-darwin*)
+ SIGNAL_HANDLER=include/darwin-signal.h
+ ;;
*)
SIGNAL_HANDLER=include/default-signal.h
;;
;;
esac
;;
- *-*-darwin*)
+ powerpc*-*-darwin*)
enable_hash_synchronization_default=no
slow_pthread_self=
- can_unwind_signal=no
+ can_unwind_signal=yes
;;
*-*-freebsd*)
slow_pthread_self=
mips*-*-linux*)
SIGNAL_HANDLER=include/mips-signal.h
;;
+ *-*-darwin*)
+ SIGNAL_HANDLER=include/darwin-signal.h
+ ;;
*)
SIGNAL_HANDLER=include/default-signal.h
;;
--- /dev/null
+/* 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 */
projects / gcc.git / commitdiff