* config/bfin/linux-unwind.h: New file.

	* config/bfin/linux.h (MD_UNWIND_SUPPORT): Define.
	* config/bfin/uclinux.h (MD_UNWIND_SUPPORT): Define.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@128140 138bc75d-0d04-0410-961f-82ee72b054a4

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 389edbf..ef99ebc 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2007-09-06  Jie Zhang  <jie.zhang@analog.com>
+
+       * config/bfin/linux-unwind.h: New file.
+       * config/bfin/linux.h (MD_UNWIND_SUPPORT): Define.
+       * config/bfin/uclinux.h (MD_UNWIND_SUPPORT): Define.
+
 2007-09-05  Laurynas Biveinis  <laurynas.biveinis@gmail.com>
 
        * Makefile.in (stmt.o): Add alloc-pool.h dependency.

diff --git a/gcc/config/bfin/linux-unwind.h b/gcc/config/bfin/linux-unwind.h
new file mode 100644 (file)
index 0000000..c369711
--- /dev/null
+++ b/gcc/config/bfin/linux-unwind.h
@@ -0,0 +1,168 @@
+/* DWARF2 EH unwinding support for Blackfin.
+   Copyright (C) 2007 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 with other programs, and to distribute
+those programs 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 another program.)
+
+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, 51 Franklin Street, Fifth Floor,
+Boston, MA 02110-1301, USA.  */
+
+/* Do code reading to identify a signal frame, and set the frame
+   state data appropriately.  See unwind-dw2.c for the structs.
+   Don't use this at all if inhibit_libc is used.  */
+
+#ifndef inhibit_libc
+
+#include <signal.h>
+#include <sys/ucontext.h>
+
+#define MD_FALLBACK_FRAME_STATE_FOR bfin_fallback_frame_state
+
+static _Unwind_Reason_Code
+bfin_fallback_frame_state (struct _Unwind_Context *context,
+                          _Unwind_FrameState *fs)
+{
+  unsigned char *pc = context->ra;
+  struct sigcontext *sc;
+  long new_cfa;
+
+  /* P0=__NR_rt_sigreturn (X); EXCPT  0x0; */
+  if (*(unsigned short *)pc == 0xe128
+      && *(unsigned short *)(pc + 2) == 0x00ad
+      && *(unsigned short *)(pc + 4) == 0x00a0)
+    {
+      struct rt_sigframe {
+       int sig;
+       struct siginfo *pinfo;
+       void *puc;
+       char retcode[8];
+       struct siginfo info;
+       struct ucontext uc;
+      } *rt_ = context->cfa;
+
+      /* The void * cast is necessary to avoid an aliasing warning.
+         The aliasing warning is correct, but should not be a problem
+         because it does not alias anything.  */
+      sc = (struct sigcontext *)(void *)&rt_->uc.uc_mcontext.gregs;
+    }
+  else
+    return _URC_END_OF_STACK;
+
+  new_cfa = sc->sc_usp;
+  fs->regs.cfa_how = CFA_REG_OFFSET;
+  fs->regs.cfa_reg = 14;
+  fs->regs.cfa_offset = new_cfa - (long) context->cfa;
+
+  fs->regs.reg[0].how = REG_SAVED_OFFSET;
+  fs->regs.reg[0].loc.offset = (long)&sc->sc_r0 - new_cfa;
+  fs->regs.reg[1].how = REG_SAVED_OFFSET;
+  fs->regs.reg[1].loc.offset = (long)&sc->sc_r1 - new_cfa;
+  fs->regs.reg[2].how = REG_SAVED_OFFSET;
+  fs->regs.reg[2].loc.offset = (long)&sc->sc_r2 - new_cfa;
+  fs->regs.reg[3].how = REG_SAVED_OFFSET;
+  fs->regs.reg[3].loc.offset = (long)&sc->sc_r3 - new_cfa;
+  fs->regs.reg[4].how = REG_SAVED_OFFSET;
+  fs->regs.reg[4].loc.offset = (long)&sc->sc_r4 - new_cfa;
+  fs->regs.reg[5].how = REG_SAVED_OFFSET;
+  fs->regs.reg[5].loc.offset = (long)&sc->sc_r5 - new_cfa;
+  fs->regs.reg[6].how = REG_SAVED_OFFSET;
+  fs->regs.reg[6].loc.offset = (long)&sc->sc_r6 - new_cfa;
+  fs->regs.reg[7].how = REG_SAVED_OFFSET;
+  fs->regs.reg[7].loc.offset = (long)&sc->sc_r7 - new_cfa;
+  fs->regs.reg[8].how = REG_SAVED_OFFSET;
+  fs->regs.reg[8].loc.offset = (long)&sc->sc_p0 - new_cfa;
+  fs->regs.reg[9].how = REG_SAVED_OFFSET;
+  fs->regs.reg[9].loc.offset = (long)&sc->sc_p1 - new_cfa;
+  fs->regs.reg[10].how = REG_SAVED_OFFSET;
+  fs->regs.reg[10].loc.offset = (long)&sc->sc_p2 - new_cfa;
+  fs->regs.reg[11].how = REG_SAVED_OFFSET;
+  fs->regs.reg[11].loc.offset = (long)&sc->sc_p3 - new_cfa;
+  fs->regs.reg[12].how = REG_SAVED_OFFSET;
+  fs->regs.reg[12].loc.offset = (long)&sc->sc_p4 - new_cfa;
+  fs->regs.reg[13].how = REG_SAVED_OFFSET;
+  fs->regs.reg[13].loc.offset = (long)&sc->sc_p5 - new_cfa;
+
+  fs->regs.reg[15].how = REG_SAVED_OFFSET;
+  fs->regs.reg[15].loc.offset = (long)&sc->sc_fp - new_cfa;
+  fs->regs.reg[16].how = REG_SAVED_OFFSET;
+  fs->regs.reg[16].loc.offset = (long)&sc->sc_i0 - new_cfa;
+  fs->regs.reg[17].how = REG_SAVED_OFFSET;
+  fs->regs.reg[17].loc.offset = (long)&sc->sc_i1 - new_cfa;
+  fs->regs.reg[18].how = REG_SAVED_OFFSET;
+  fs->regs.reg[18].loc.offset = (long)&sc->sc_i2 - new_cfa;
+  fs->regs.reg[19].how = REG_SAVED_OFFSET;
+  fs->regs.reg[19].loc.offset = (long)&sc->sc_i3 - new_cfa;
+  fs->regs.reg[20].how = REG_SAVED_OFFSET;
+  fs->regs.reg[20].loc.offset = (long)&sc->sc_b0 - new_cfa;
+  fs->regs.reg[21].how = REG_SAVED_OFFSET;
+  fs->regs.reg[21].loc.offset = (long)&sc->sc_b1 - new_cfa;
+  fs->regs.reg[22].how = REG_SAVED_OFFSET;
+  fs->regs.reg[22].loc.offset = (long)&sc->sc_b2 - new_cfa;
+  fs->regs.reg[23].how = REG_SAVED_OFFSET;
+  fs->regs.reg[23].loc.offset = (long)&sc->sc_b3 - new_cfa;
+  fs->regs.reg[24].how = REG_SAVED_OFFSET;
+  fs->regs.reg[24].loc.offset = (long)&sc->sc_l0 - new_cfa;
+  fs->regs.reg[25].how = REG_SAVED_OFFSET;
+  fs->regs.reg[25].loc.offset = (long)&sc->sc_l1 - new_cfa;
+  fs->regs.reg[26].how = REG_SAVED_OFFSET;
+  fs->regs.reg[26].loc.offset = (long)&sc->sc_l2 - new_cfa;
+  fs->regs.reg[27].how = REG_SAVED_OFFSET;
+  fs->regs.reg[27].loc.offset = (long)&sc->sc_l3 - new_cfa;
+  fs->regs.reg[28].how = REG_SAVED_OFFSET;
+  fs->regs.reg[28].loc.offset = (long)&sc->sc_m0 - new_cfa;
+  fs->regs.reg[29].how = REG_SAVED_OFFSET;
+  fs->regs.reg[29].loc.offset = (long)&sc->sc_m1 - new_cfa;
+  fs->regs.reg[30].how = REG_SAVED_OFFSET;
+  fs->regs.reg[30].loc.offset = (long)&sc->sc_m2 - new_cfa;
+  fs->regs.reg[31].how = REG_SAVED_OFFSET;
+  fs->regs.reg[31].loc.offset = (long)&sc->sc_m3 - new_cfa;
+  /* FIXME: Handle A0, A1, CC.  */
+  fs->regs.reg[35].how = REG_SAVED_OFFSET;
+  fs->regs.reg[35].loc.offset = (long)&sc->sc_rets - new_cfa;
+  fs->regs.reg[36].how = REG_SAVED_OFFSET;
+  fs->regs.reg[36].loc.offset = (long)&sc->sc_pc - new_cfa;
+  fs->regs.reg[37].how = REG_SAVED_OFFSET;
+  fs->regs.reg[37].loc.offset = (long)&sc->sc_retx - new_cfa;
+
+  fs->regs.reg[40].how = REG_SAVED_OFFSET;
+  fs->regs.reg[40].loc.offset = (long)&sc->sc_astat - new_cfa;
+  fs->regs.reg[41].how = REG_SAVED_OFFSET;
+  fs->regs.reg[41].loc.offset = (long)&sc->sc_seqstat - new_cfa;
+
+  fs->regs.reg[44].how = REG_SAVED_OFFSET;
+  fs->regs.reg[44].loc.offset = (long)&sc->sc_lt0 - new_cfa;
+  fs->regs.reg[45].how = REG_SAVED_OFFSET;
+  fs->regs.reg[45].loc.offset = (long)&sc->sc_lt1 - new_cfa;
+  fs->regs.reg[46].how = REG_SAVED_OFFSET;
+  fs->regs.reg[46].loc.offset = (long)&sc->sc_lc0 - new_cfa;
+  fs->regs.reg[47].how = REG_SAVED_OFFSET;
+  fs->regs.reg[47].loc.offset = (long)&sc->sc_lc1 - new_cfa;
+  fs->regs.reg[48].how = REG_SAVED_OFFSET;
+  fs->regs.reg[48].loc.offset = (long)&sc->sc_lb0 - new_cfa;
+  fs->regs.reg[49].how = REG_SAVED_OFFSET;
+  fs->regs.reg[49].loc.offset = (long)&sc->sc_lb1 - new_cfa;
+  fs->retaddr_column = 35;
+
+  return _URC_NO_REASON;
+}
+
+#endif /* ifdef inhibit_libc */

diff --git a/gcc/config/bfin/linux.h b/gcc/config/bfin/linux.h
index 486bb77..8e063bd 100644 (file)
--- a/gcc/config/bfin/linux.h
+++ b/gcc/config/bfin/linux.h
@@ -48,3 +48,4 @@ asm (TEXT_SECTION_ASM_OP);
    %{!dynamic-linker:-dynamic-linker /lib/ld-uClibc.so.0}} \
    %{static}} -init __init -fini __fini"
 
+#define MD_UNWIND_SUPPORT "config/bfin/linux-unwind.h"

diff --git a/gcc/config/bfin/uclinux.h b/gcc/config/bfin/uclinux.h
index 8e5516b..954e66a 100644 (file)
--- a/gcc/config/bfin/uclinux.h
+++ b/gcc/config/bfin/uclinux.h
@@ -44,6 +44,8 @@ asm (TEXT_SECTION_ASM_OP);
     }                                          \
   while (0)
 
+#define MD_UNWIND_SUPPORT "config/bfin/linux-unwind.h"
+
 /* Like the definition in gcc.c, but for purposes of uClinux, every link is
    static.  */
 #define MFWRAP_SPEC " %{fmudflap|fmudflapth: \