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-rw-r--r--libjava/sysdep/i386/backtrace.h123
1 files changed, 0 insertions, 123 deletions
diff --git a/libjava/sysdep/i386/backtrace.h b/libjava/sysdep/i386/backtrace.h
deleted file mode 100644
index cfdf07b..0000000
--- a/libjava/sysdep/i386/backtrace.h
+++ /dev/null
@@ -1,123 +0,0 @@
-// backtrace.h - Fallback backtrace implementation. i386 implementation.
-
-/* Copyright (C) 2005, 2006 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. */
-
-#ifndef __SYSDEP_BACKTRACE_H__
-#define __SYSDEP_BACKTRACE_H__
-
-#include <java-stack.h>
-
-#ifdef __CYGWIN__
-/* To allow this to link as a DLL. */
-#define MAIN_FUNC dll_crt0__FP11per_process
-extern "C" int MAIN_FUNC () __declspec(dllimport);
-#elif defined (_WIN32)
-#define MAIN_FUNC DllMain
-extern "C" int __stdcall MAIN_FUNC (void *, unsigned long, void *);
-#else /* !__CYGWIN__ && !_WIN32 */
-#define MAIN_FUNC main
-extern int MAIN_FUNC (int, char **);
-#endif /* ?__CYGWIN__ */
-
-/* The context used to keep track of our position while unwinding through
- the call stack. */
-struct _Unwind_Context
-{
- /* The starting address of the method. */
- _Jv_uintptr_t meth_addr;
-
- /* The return address in the method. */
- _Jv_uintptr_t ret_addr;
-};
-
-#ifdef __USING_SJLJ_EXCEPTIONS__
-
-#undef _Unwind_GetIPInfo
-#define _Unwind_GetIPInfo(ctx,ip_before_insn) \
- (*(ip_before_insn) = 1, (ctx)->ret_addr)
-
-#undef _Unwind_GetRegionStart
-#define _Unwind_GetRegionStart(ctx) \
- ((ctx)->meth_addr)
-
-#undef _Unwind_Backtrace
-#define _Unwind_Backtrace(trace_fn,state_ptr) \
- (fallback_backtrace (trace_fn, state_ptr))
-
-#endif /* __USING_SJLJ_EXCEPTIONS__ */
-
-/* Unwind through the call stack calling TRACE_FN with STATE for each stack
- frame. Returns the reason why the unwinding was stopped. */
-_Unwind_Reason_Code
-fallback_backtrace (_Unwind_Trace_Fn trace_fn, _Jv_UnwindState *state)
-{
- register _Jv_uintptr_t *_ebp __asm__ ("ebp");
- register _Jv_uintptr_t _esp __asm__ ("esp");
- _Jv_uintptr_t rfp;
- _Unwind_Context ctx;
-
- for (rfp = *_ebp; rfp; rfp = *(_Jv_uintptr_t *)rfp)
- {
- /* Sanity checks to eliminate dubious-looking frame pointer chains.
- The frame pointer should be a 32-bit word-aligned stack address.
- Since the stack grows downwards on x86, the frame pointer must have
- a value greater than the current value of the stack pointer, it
- should not be below the supposed next frame pointer and it should
- not be too far off from the supposed next frame pointer. */
- int diff = *(_Jv_uintptr_t *)rfp - rfp;
- if ((rfp & 0x00000003) != 0 || rfp < _esp
- || diff > 4 * 1024 || diff < 0)
- break;
-
- /* Get the return address in the calling function. This is stored on
- the stack just before the value of the old frame pointer. */
- ctx.ret_addr = *(_Jv_uintptr_t *)(rfp + sizeof (_Jv_uintptr_t));
-
- /* Try to locate a "pushl %ebp; movl %esp, %ebp" function prologue
- by scanning backwards at even addresses below the return address.
- This instruction sequence is encoded either as 0x55 0x89 0xE5 or as
- 0x55 0x8B 0xEC. We give up if we do not find this sequence even
- after scanning 1024K of memory.
- FIXME: This is not robust and will probably give us false positives,
- but this is about the best we can do if we do not have DWARF-2 unwind
- information based exception handling. */
- ctx.meth_addr = (_Jv_uintptr_t)NULL;
- _Jv_uintptr_t scan_addr = (ctx.ret_addr & 0xFFFFFFFE) - 2;
- _Jv_uintptr_t limit_addr
- = (scan_addr > 1024 * 1024) ? (scan_addr - 1024 * 1024) : 2;
- for ( ; scan_addr >= limit_addr; scan_addr -= 2)
- {
- unsigned char *scan_bytes = (unsigned char *)scan_addr;
- if (scan_bytes[0] == 0x55
- && ((scan_bytes[1] == 0x89 && scan_bytes[2] == 0xE5)
- || (scan_bytes[1] == 0x8B && scan_bytes[2] == 0xEC)))
- {
- ctx.meth_addr = scan_addr;
- break;
- }
- }
-
- /* Now call the unwinder callback function. */
- if (trace_fn != NULL)
- (*trace_fn) (&ctx, state);
-
- /* No need to unwind beyond _Jv_RunMain(), _Jv_ThreadStart or
- main(). */
- void *jv_runmain
- = (void *)(void (*)(JvVMInitArgs *, jclass, const char *, int,
- const char **, bool))_Jv_RunMain;
- if (ctx.meth_addr == (_Jv_uintptr_t)jv_runmain
- || ctx.meth_addr == (_Jv_uintptr_t)_Jv_ThreadStart
- || (ctx.meth_addr - (_Jv_uintptr_t)MAIN_FUNC) < 16)
- break;
- }
-
- return _URC_NO_REASON;
-}
-#endif