From: Roland McGrath <roland@redhat.com>
Date: Sat, 28 Mar 2009 23:49:53 +0000 (-0700)
Subject: Make Dwarf_Frame point to fde record, not cie record.
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=49ff43d083757e05c86eea25971124fb7b44f302;p=thirdparty%2Felfutils.git

Make Dwarf_Frame point to fde record, not cie record.
---

diff --git a/libdw/dwarf_frame_return_address_register.c b/libdw/dwarf_frame_return_address_register.c
index 0ca38840b..ef2d7e112 100644
--- a/libdw/dwarf_frame_return_address_register.c
+++ b/libdw/dwarf_frame_return_address_register.c
@@ -1,5 +1,5 @@
 /* Get return address register for frame.
-   Copyright (C) 2006 Red Hat, Inc.
+   Copyright (C) 2006, 2009 Red Hat, Inc.
    This file is part of Red Hat elfutils.
 
    Red Hat elfutils is free software; you can redistribute it and/or modify
@@ -58,6 +58,6 @@ dwarf_frame_return_address_register (fs, signalp)
      Dwarf_Frame *fs;
      bool *signalp;
 {
-  *signalp = fs->cie->signal_frame;
-  return fs->cie->return_address_register;
+  *signalp = fs->fde->cie->signal_frame;
+  return fs->fde->cie->return_address_register;
 }
diff --git a/libdw/frame-cache.c b/libdw/frame-cache.c
index 784d014d5..179870c56 100644
--- a/libdw/frame-cache.c
+++ b/libdw/frame-cache.c
@@ -61,7 +61,7 @@ free_cie (void *arg)
 {
   struct dwarf_cie *cie = arg;
 
-  free (cie->initial_state);
+  free ((Dwarf_Frame *) cie->initial_state);
   free (cie);
 }
 
diff --git a/libdw/unwind.c b/libdw/unwind.c
index 1328ba74f..82380cb1d 100644
--- a/libdw/unwind.c
+++ b/libdw/unwind.c
@@ -63,7 +63,7 @@
 #define CFI_PRIMARY_MAX	0x3f
 
 static Dwarf_Frame *
-duplicate_frame_state (Dwarf_Frame *original,
+duplicate_frame_state (const Dwarf_Frame *original,
 		       Dwarf_Frame *prev)
 {
   size_t size = offsetof (Dwarf_Frame, regs[original->nregs]);
@@ -432,7 +432,6 @@ __libdw_frame_at_address (Dwarf_CFI *cache, struct dwarf_fde *fde,
       /* Now we have the initial state of things that all
 	 FDEs using this CIE will start from.  */
       cie_fs->cache = cache;
-      cie_fs->cie = fde->cie;
       fde->cie->initial_state = cie_fs;
     }
 
@@ -440,6 +439,8 @@ __libdw_frame_at_address (Dwarf_CFI *cache, struct dwarf_fde *fde,
   if (unlikely (fs == NULL))
     return DWARF_E_NOMEM;
 
+  fs->fde = fde;
+
   int result = execute_cfi (cache, fde->cie, &fs,
 			    fde->instructions, fde->instructions_end, false,
 			    fde->start, address);
diff --git a/libdw/unwindP.h b/libdw/unwindP.h
index 893726c99..b42964197 100644
--- a/libdw/unwindP.h
+++ b/libdw/unwindP.h
@@ -69,7 +69,7 @@ struct dwarf_cie
   const uint8_t *initial_instructions;
   const uint8_t *initial_instructions_end;
 
-  Dwarf_Frame *initial_state;
+  const Dwarf_Frame *initial_state;
 
   uint8_t fde_encoding;		/* DW_EH_PE_* for addresses in FDEs.  */
   uint8_t lsda_encoding;    /* DW_EH_PE_* for LSDA in FDE augmentation.  */
@@ -178,11 +178,13 @@ struct Dwarf_Frame_s
 {
   Dwarf_CFI *cache;
 
+  /* Previous state saved by DW_CFA_remember_state, or .cie->initial_state,
+     or NULL in an initial_state pseudo-frame.  */
   Dwarf_Frame *prev;
 
-  /* The CIE we got this FDE from.
-     This has the return_address_register and signal_frame flag.  */
-  struct dwarf_cie *cie;
+  /* The FDE that generated this frame state.  This points to its CIE,
+     which has the return_address_register and signal_frame flag.  */
+  struct dwarf_fde *fde;
 
   /* The CFA is unknown, is R+N, or is computed by a DWARF expression.  */
   enum { cfa_undefined, cfa_offset, cfa_expr } cfa_rule;