[ARC] Fix to unwinding.
gcc/ChangeLog:
2017-11-03 Cupertino Miranda <cmiranda@synopsys.com>
* config/arc/arc.c (arc_save_restore): Corrected CFA note.
(arc_expand_prologue): Restore blink for millicode.
* config/arc/linux.h (LINK_EH_SPEC): Defined.
libgcc/ChangeLog:
2017-11-03 Cupertino Miranda <cmiranda@synopsys.com>
Vineet Gupta <vgupta@synopsys.com>
* config.host (arc*-*-linux*): Set md_unwind_header variable.
* config/arc/linux-unwind-reg.def: New file.
* config/arc/linux-unwind.h: Likewise.
Co-Authored-By: Vineet Gupta <vgupta@synopsys.com>
From-SVN: r254367
This commit is contained in:
Cupertino Miranda
Claudiu Zissulescu
parent
a34a16abe5
commit
b0c7ddf816
|
|
@ -1,3 +1,9 @@
|
|||
2017-11-03 Cupertino Miranda <cmiranda@synopsys.com>
|
||||
|
||||
* config/arc/arc.c (arc_save_restore): Corrected CFA note.
|
||||
(arc_expand_prologue): Restore blink for millicode.
|
||||
* config/arc/linux.h (LINK_EH_SPEC): Defined.
|
||||
|
||||
2017-11-03 Richard Sandiford <richard.sandiford@linaro.org>
|
||||
|
||||
PR target/82809
|
||||
|
|
|
|||
|
|
@ -2823,12 +2823,23 @@ arc_save_restore (rtx base_reg,
|
|||
else
|
||||
{
|
||||
insn = frame_insn (insn);
|
||||
if (epilogue_p)
|
||||
for (r = start_call; r <= end_call; r++)
|
||||
{
|
||||
rtx reg = gen_rtx_REG (SImode, r);
|
||||
add_reg_note (insn, REG_CFA_RESTORE, reg);
|
||||
}
|
||||
for (r = start_call, off = 0;
|
||||
r <= end_call;
|
||||
r++, off += UNITS_PER_WORD)
|
||||
{
|
||||
rtx reg = gen_rtx_REG (SImode, r);
|
||||
if (epilogue_p)
|
||||
add_reg_note (insn, REG_CFA_RESTORE, reg);
|
||||
else
|
||||
{
|
||||
rtx mem = gen_rtx_MEM (SImode, plus_constant (Pmode,
|
||||
base_reg,
|
||||
off));
|
||||
|
||||
add_reg_note (insn, REG_CFA_OFFSET,
|
||||
gen_rtx_SET (mem, reg));
|
||||
}
|
||||
}
|
||||
}
|
||||
offset += off;
|
||||
}
|
||||
|
|
@ -3070,6 +3081,19 @@ arc_expand_prologue (void)
|
|||
frame_size_to_allocate -= cfun->machine->frame_info.reg_size;
|
||||
}
|
||||
|
||||
/* In the case of millicode thunk, we need to restore the clobbered
|
||||
blink register. */
|
||||
if (cfun->machine->frame_info.millicode_end_reg > 0
|
||||
&& arc_must_save_return_addr (cfun))
|
||||
{
|
||||
HOST_WIDE_INT tmp = cfun->machine->frame_info.reg_size;
|
||||
emit_insn (gen_rtx_SET (gen_rtx_REG (Pmode, RETURN_ADDR_REGNUM),
|
||||
gen_rtx_MEM (Pmode,
|
||||
plus_constant (Pmode,
|
||||
stack_pointer_rtx,
|
||||
tmp))));
|
||||
}
|
||||
|
||||
/* Save frame pointer if needed. First save the FP on stack, if not
|
||||
autosaved. */
|
||||
if (arc_frame_pointer_needed ()
|
||||
|
|
|
|||
|
|
@ -91,3 +91,11 @@ along with GCC; see the file COPYING3. If not see
|
|||
/* Pre/post modify with register displacement are default off. */
|
||||
#undef TARGET_AUTO_MODIFY_REG_DEFAULT
|
||||
#define TARGET_AUTO_MODIFY_REG_DEFAULT 0
|
||||
|
||||
#if DEFAULT_LIBC == LIBC_GLIBC
|
||||
/* Override linux.h LINK_EH_SPEC definition.
|
||||
Signalize that because we have fde-glibc, we don't need all C shared libs
|
||||
linked against -lgcc_s. */
|
||||
#undef LINK_EH_SPEC
|
||||
#define LINK_EH_SPEC "--eh-frame-hdr"
|
||||
#endif
|
||||
|
|
|
|||
|
|
@ -1,3 +1,10 @@
|
|||
2017-11-03 Cupertino Miranda <cmiranda@synopsys.com>
|
||||
Vineet Gupta <vgupta@synopsys.com>
|
||||
|
||||
* config.host (arc*-*-linux*): Set md_unwind_header variable.
|
||||
* config/arc/linux-unwind-reg.def: New file.
|
||||
* config/arc/linux-unwind-reg.h: Likewise.
|
||||
|
||||
2017-10-23 Sebastian Perta <sebastian.perta@renesas.com>
|
||||
|
||||
* config/rl78/subdi3.S: New assembly file.
|
||||
|
|
|
|||
|
|
@ -390,6 +390,7 @@ arc*-*-linux*)
|
|||
tmake_file="${tmake_file} t-slibgcc-libgcc t-slibgcc-nolc-override arc/t-arc-uClibc arc/t-arc"
|
||||
extra_parts="$extra_parts crti.o crtn.o"
|
||||
extra_parts="$extra_parts crttls.o"
|
||||
md_unwind_header=arc/linux-unwind.h
|
||||
;;
|
||||
arm-wrs-vxworks|arm-wrs-vxworks7)
|
||||
tmake_file="$tmake_file arm/t-arm arm/t-elf t-softfp-sfdf t-softfp-excl arm/t-softfp t-softfp"
|
||||
|
|
|
|||
|
|
@ -0,0 +1,42 @@
|
|||
/* Copyright (C) 2017 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 3, or (at your option)
|
||||
any later version.
|
||||
|
||||
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 COPYING3. If not see
|
||||
<http://www.gnu.org/licenses/>.
|
||||
*/
|
||||
|
||||
REGISTER_IN_STACK(bta, -1)
|
||||
REGISTER_IN_STACK(lp_start, -1)
|
||||
REGISTER_IN_STACK(lp_end, -1)
|
||||
REGISTER_IN_STACK(lp_count, -1)
|
||||
REGISTER_IN_STACK(status32, -1)
|
||||
REGISTER_IN_STACK(ret, -1)
|
||||
REGISTER_IN_STACK(blink, 31)
|
||||
REGISTER_IN_STACK(fp, 27)
|
||||
REGISTER_IN_STACK(gp, 26)
|
||||
REGISTER_IN_STACK(r12, 12)
|
||||
REGISTER_IN_STACK(r11, 11)
|
||||
REGISTER_IN_STACK(r10, 10)
|
||||
REGISTER_IN_STACK(r9, 9)
|
||||
REGISTER_IN_STACK(r8, 8)
|
||||
REGISTER_IN_STACK(r7, 7)
|
||||
REGISTER_IN_STACK(r6, 6)
|
||||
REGISTER_IN_STACK(r5, 5)
|
||||
REGISTER_IN_STACK(r4, 4)
|
||||
REGISTER_IN_STACK(r3, 3)
|
||||
REGISTER_IN_STACK(r2, 2)
|
||||
REGISTER_IN_STACK(r1, 1)
|
||||
REGISTER_IN_STACK(r0, 0)
|
||||
REGISTER_IN_STACK(sp, 28)
|
||||
|
|
@ -0,0 +1,153 @@
|
|||
/* DWARF2 EH unwinding support for ARC Linux.
|
||||
Copyright (C) 2017 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 3, or (at your option)
|
||||
any later version.
|
||||
|
||||
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.
|
||||
|
||||
Under Section 7 of GPL version 3, you are granted additional
|
||||
permissions described in the GCC Runtime Library Exception, version
|
||||
3.1, as published by the Free Software Foundation.
|
||||
|
||||
You should have received a copy of the GNU General Public License
|
||||
and a copy of the GCC Runtime Library Exception along with this
|
||||
program; see the files COPYING3 and COPYING.RUNTIME respectively.
|
||||
If not, see <http://www.gnu.org/licenses/>. */
|
||||
|
||||
/* This order is defined by a structure in the kernel, in file
|
||||
arch/arc/kernel/signal.c. */
|
||||
|
||||
#define REGISTER_IN_STACK(REG_NAME, ID) \
|
||||
REG_NAME,
|
||||
enum registers_stack_order {
|
||||
REGISTER_STACK_ORDER_START = -1,
|
||||
#include "config/arc/linux-unwind-reg.def"
|
||||
REGISTER_STACK_ORDER_SIZE,
|
||||
};
|
||||
|
||||
struct register_position {
|
||||
int reg_id;
|
||||
int offset_in_stack;
|
||||
};
|
||||
#undef REGISTER_IN_STACK
|
||||
|
||||
#define REGISTER_SIZE_IN_WORDS 4
|
||||
#define REGISTER_IN_STACK(REG_NAME, ID) (int) ID,
|
||||
int
|
||||
register_id_for_index[REGISTER_STACK_ORDER_SIZE] = {
|
||||
#include "config/arc/linux-unwind-reg.def"
|
||||
};
|
||||
#undef REGISTER_IN_STACK
|
||||
|
||||
#ifndef inhibit_libc
|
||||
/* Do code reading to identify a signal frame, and set the frame
|
||||
state data appropriately. See unwind-dw2.c for the structs. */
|
||||
|
||||
#include <signal.h>
|
||||
#include <asm/unistd.h>
|
||||
|
||||
/*
|
||||
00010edc <__default_rt_sa_restorer>:
|
||||
10edc: 208a 12c2 mov r8,139
|
||||
10ee0: 781e trap_s 0
|
||||
10ee2: 7ee0 j_s [blink]
|
||||
*/
|
||||
|
||||
#if __BIG_ENDIAN__
|
||||
#define MOV_R8_139 0x8a20c212
|
||||
#define TRAP_S_J_S_BLINK 0x1e78e07e
|
||||
#define SWI 0x6f223f00
|
||||
#elif __LITTLE_ENDIAN__
|
||||
#define MOV_R8_139 0x12c2208a
|
||||
#define TRAP_S_J_S_BLINK 0x7ee0781e
|
||||
#define SWI 0x003f226f
|
||||
#endif
|
||||
|
||||
#define MD_FALLBACK_FRAME_STATE_FOR arc_fallback_frame_state
|
||||
|
||||
static __attribute__((noinline)) _Unwind_Reason_Code
|
||||
arc_fallback_frame_state (struct _Unwind_Context *context,
|
||||
_Unwind_FrameState *fs)
|
||||
{
|
||||
struct rt_sigframe {
|
||||
siginfo_t info;
|
||||
ucontext_t uc;
|
||||
unsigned int sigret_magic;
|
||||
};
|
||||
|
||||
struct rt_sigframe *rt_;
|
||||
u_int32_t *pc = (u_int32_t *) context->ra;
|
||||
struct sigcontext *sc;
|
||||
_Unwind_Ptr new_cfa;
|
||||
int i;
|
||||
|
||||
#ifdef __ARC700__
|
||||
if (pc[1] != SWI)
|
||||
return _URC_END_OF_STACK;
|
||||
#else
|
||||
if (pc[1] != TRAP_S_J_S_BLINK)
|
||||
return _URC_END_OF_STACK;
|
||||
#endif
|
||||
|
||||
if (pc[0] == MOV_R8_139)
|
||||
{
|
||||
rt_ = context->cfa;
|
||||
sc = &rt_->uc.uc_mcontext;
|
||||
}
|
||||
else
|
||||
return _URC_END_OF_STACK;
|
||||
|
||||
new_cfa = (_Unwind_Ptr) sc;
|
||||
fs->regs.cfa_how = CFA_REG_OFFSET;
|
||||
fs->regs.cfa_reg = __LIBGCC_STACK_POINTER_REGNUM__;
|
||||
fs->regs.cfa_offset = new_cfa - (_Unwind_Ptr) context->cfa;
|
||||
|
||||
unsigned long *regs = &sc->regs.scratch.bta;
|
||||
for (i = 0; i < REGISTER_STACK_ORDER_SIZE; i++)
|
||||
{
|
||||
if (register_id_for_index[i] == -1)
|
||||
continue;
|
||||
fs->regs.reg[register_id_for_index[i]].how = REG_SAVED_OFFSET;
|
||||
fs->regs.reg[register_id_for_index[i]].loc.offset
|
||||
= ((_Unwind_Ptr) &(regs[i])) - new_cfa;
|
||||
}
|
||||
|
||||
fs->regs.reg[31].how = REG_SAVED_VAL_OFFSET;
|
||||
fs->regs.reg[31].loc.offset = ((_Unwind_Ptr) (regs[ret])) - new_cfa;
|
||||
|
||||
fs->retaddr_column = 31;
|
||||
|
||||
return _URC_NO_REASON;
|
||||
}
|
||||
#endif
|
||||
|
||||
#define MD_FROB_UPDATE_CONTEXT arc_frob_update_context
|
||||
/* Save fp register for unwinding to work. */
|
||||
|
||||
static void
|
||||
arc_frob_update_context (struct _Unwind_Context *context,
|
||||
_Unwind_FrameState *fs)
|
||||
{
|
||||
_Unwind_Word fp_val;
|
||||
asm ("mov %0,fp" : "=r" (fp_val));
|
||||
|
||||
switch (fs->regs.reg[27].how)
|
||||
{
|
||||
case REG_UNSAVED:
|
||||
case REG_UNDEFINED:
|
||||
if (context->reg[27] == NULL)
|
||||
_Unwind_SetGRValue (context, 27, fp_val);
|
||||
break;
|
||||
|
||||
default:
|
||||
break;
|
||||
}
|
||||
}
|
||||
Loading…
Reference in New Issue