vendor/compiler-rt/compiler-rt-r224034

1 files changed, 0 insertions, 247 deletions

diff --git a/lib/gcc_personality_v0.c b/lib/gcc_personality_v0.c
deleted file mode 100644
index 8a708cae59748..0000000000000
--- a/lib/gcc_personality_v0.c
+++ /dev/null
@@ -1,247 +0,0 @@
-/* ===-- gcc_personality_v0.c - Implement __gcc_personality_v0 -------------===
- *
- *      	       The LLVM Compiler Infrastructure
- *
- * This file is dual licensed under the MIT and the University of Illinois Open
- * Source Licenses. See LICENSE.TXT for details.
- *
- * ===----------------------------------------------------------------------===
- *
- */
-
-#include "int_lib.h"
-
-/*
- * _Unwind_* stuff based on C++ ABI public documentation
- * http://refspecs.freestandards.org/abi-eh-1.21.html
- */
-
-typedef enum {
-    _URC_NO_REASON = 0,
-    _URC_FOREIGN_EXCEPTION_CAUGHT = 1,
-    _URC_FATAL_PHASE2_ERROR = 2,
-    _URC_FATAL_PHASE1_ERROR = 3,
-    _URC_NORMAL_STOP = 4,
-    _URC_END_OF_STACK = 5,
-    _URC_HANDLER_FOUND = 6,
-    _URC_INSTALL_CONTEXT = 7,
-    _URC_CONTINUE_UNWIND = 8
-} _Unwind_Reason_Code;
-
-typedef enum {
-    _UA_SEARCH_PHASE = 1,
-    _UA_CLEANUP_PHASE = 2,
-    _UA_HANDLER_FRAME = 4,
-    _UA_FORCE_UNWIND = 8,
-    _UA_END_OF_STACK = 16
-} _Unwind_Action;
-
-typedef struct _Unwind_Context* _Unwind_Context_t;
-
-struct _Unwind_Exception {
-    uint64_t                exception_class;
-    void                    (*exception_cleanup)(_Unwind_Reason_Code reason, 
-                                                 struct _Unwind_Exception* exc);
-    uintptr_t                private_1;    
-    uintptr_t                private_2;    
-};
-
-extern const uint8_t*    _Unwind_GetLanguageSpecificData(_Unwind_Context_t c);
-extern void              _Unwind_SetGR(_Unwind_Context_t c, int i, uintptr_t n);
-extern void              _Unwind_SetIP(_Unwind_Context_t, uintptr_t new_value);
-extern uintptr_t         _Unwind_GetIP(_Unwind_Context_t context);
-extern uintptr_t         _Unwind_GetRegionStart(_Unwind_Context_t context);
-
-
-/*
- * Pointer encodings documented at:
- *   http://refspecs.freestandards.org/LSB_1.3.0/gLSB/gLSB/ehframehdr.html
- */
-
-#define DW_EH_PE_omit      0xff  /* no data follows */
-
-#define DW_EH_PE_absptr    0x00
-#define DW_EH_PE_uleb128   0x01
-#define DW_EH_PE_udata2    0x02
-#define DW_EH_PE_udata4    0x03
-#define DW_EH_PE_udata8    0x04
-#define DW_EH_PE_sleb128   0x09
-#define DW_EH_PE_sdata2    0x0A
-#define DW_EH_PE_sdata4    0x0B
-#define DW_EH_PE_sdata8    0x0C
-
-#define DW_EH_PE_pcrel     0x10
-#define DW_EH_PE_textrel   0x20
-#define DW_EH_PE_datarel   0x30
-#define DW_EH_PE_funcrel   0x40
-#define DW_EH_PE_aligned   0x50  
-#define DW_EH_PE_indirect  0x80 /* gcc extension */
-
-
-
-/* read a uleb128 encoded value and advance pointer */
-static uintptr_t readULEB128(const uint8_t** data)
-{
-    uintptr_t result = 0;
-    uintptr_t shift = 0;
-    unsigned char byte;
-    const uint8_t* p = *data;
-    do {
-        byte = *p++;
-        result |= (byte & 0x7f) << shift;
-        shift += 7;
-    } while (byte & 0x80);
-    *data = p;
-    return result;
-}
-
-/* read a pointer encoded value and advance pointer */
-static uintptr_t readEncodedPointer(const uint8_t** data, uint8_t encoding)
-{
-    const uint8_t* p = *data;
-    uintptr_t result = 0;
-
-    if ( encoding == DW_EH_PE_omit ) 
-        return 0;
-
-    /* first get value */
-    switch (encoding & 0x0F) {
-        case DW_EH_PE_absptr:
-            result = *((uintptr_t*)p);
-            p += sizeof(uintptr_t);
-            break;
-        case DW_EH_PE_uleb128:
-            result = readULEB128(&p);
-            break;
-        case DW_EH_PE_udata2:
-            result = *((uint16_t*)p);
-            p += sizeof(uint16_t);
-            break;
-        case DW_EH_PE_udata4:
-            result = *((uint32_t*)p);
-            p += sizeof(uint32_t);
-            break;
-        case DW_EH_PE_udata8:
-            result = *((uint64_t*)p);
-            p += sizeof(uint64_t);
-            break;
-        case DW_EH_PE_sdata2:
-            result = *((int16_t*)p);
-            p += sizeof(int16_t);
-            break;
-        case DW_EH_PE_sdata4:
-            result = *((int32_t*)p);
-            p += sizeof(int32_t);
-            break;
-        case DW_EH_PE_sdata8:
-            result = *((int64_t*)p);
-            p += sizeof(int64_t);
-            break;
-        case DW_EH_PE_sleb128:
-        default:
-            /* not supported */
-            compilerrt_abort();
-            break;
-    }
-
-    /* then add relative offset */
-    switch ( encoding & 0x70 ) {
-        case DW_EH_PE_absptr:
-            /* do nothing */
-            break;
-        case DW_EH_PE_pcrel:
-            result += (uintptr_t)(*data);
-            break;
-        case DW_EH_PE_textrel:
-        case DW_EH_PE_datarel:
-        case DW_EH_PE_funcrel:
-        case DW_EH_PE_aligned:
-        default:
-            /* not supported */
-            compilerrt_abort();
-            break;
-    }
-
-    /* then apply indirection */
-    if (encoding & DW_EH_PE_indirect) {
-        result = *((uintptr_t*)result);
-    }
-
-    *data = p;
-    return result;
-}
-
-
-/*
- * The C compiler makes references to __gcc_personality_v0 in
- * the dwarf unwind information for translation units that use
- * __attribute__((cleanup(xx))) on local variables.
- * This personality routine is called by the system unwinder
- * on each frame as the stack is unwound during a C++ exception
- * throw through a C function compiled with -fexceptions.
- */
-#if __arm__
-// the setjump-longjump based exceptions personality routine has a different name
-_Unwind_Reason_Code __gcc_personality_sj0(int version, _Unwind_Action actions,
-         uint64_t exceptionClass, struct _Unwind_Exception* exceptionObject,
-         _Unwind_Context_t context)
-#else
-_Unwind_Reason_Code __gcc_personality_v0(int version, _Unwind_Action actions,
-         uint64_t exceptionClass, struct _Unwind_Exception* exceptionObject,
-         _Unwind_Context_t context)
-#endif
-{
-    /* Since C does not have catch clauses, there is nothing to do during */
-    /* phase 1 (the search phase). */
-    if ( actions & _UA_SEARCH_PHASE ) 
-        return _URC_CONTINUE_UNWIND;
-        
-    /* There is nothing to do if there is no LSDA for this frame. */
-    const uint8_t* lsda = _Unwind_GetLanguageSpecificData(context);
-    if ( lsda == (uint8_t*) 0 )
-        return _URC_CONTINUE_UNWIND;
-
-    uintptr_t pc = _Unwind_GetIP(context)-1;
-    uintptr_t funcStart = _Unwind_GetRegionStart(context);
-    uintptr_t pcOffset = pc - funcStart;
-
-    /* Parse LSDA header. */
-    uint8_t lpStartEncoding = *lsda++;
-    if (lpStartEncoding != DW_EH_PE_omit) {
-        readEncodedPointer(&lsda, lpStartEncoding); 
-    }
-    uint8_t ttypeEncoding = *lsda++;
-    if (ttypeEncoding != DW_EH_PE_omit) {
-        readULEB128(&lsda);  
-    }
-    /* Walk call-site table looking for range that includes current PC. */
-    uint8_t         callSiteEncoding = *lsda++;
-    uint32_t        callSiteTableLength = readULEB128(&lsda);
-    const uint8_t*  callSiteTableStart = lsda;
-    const uint8_t*  callSiteTableEnd = callSiteTableStart + callSiteTableLength;
-    const uint8_t* p=callSiteTableStart;
-    while (p < callSiteTableEnd) {
-        uintptr_t start = readEncodedPointer(&p, callSiteEncoding);
-        uintptr_t length = readEncodedPointer(&p, callSiteEncoding);
-        uintptr_t landingPad = readEncodedPointer(&p, callSiteEncoding);
-        readULEB128(&p); /* action value not used for C code */
-        if ( landingPad == 0 )
-            continue; /* no landing pad for this entry */
-        if ( (start <= pcOffset) && (pcOffset < (start+length)) ) {
-            /* Found landing pad for the PC.
-             * Set Instruction Pointer to so we re-enter function 
-             * at landing pad. The landing pad is created by the compiler
-             * to take two parameters in registers.
-	     */
-            _Unwind_SetGR(context, __builtin_eh_return_data_regno(0), 
-                                                (uintptr_t)exceptionObject);
-            _Unwind_SetGR(context, __builtin_eh_return_data_regno(1), 0);
-            _Unwind_SetIP(context, funcStart+landingPad);
-            return _URC_INSTALL_CONTEXT;
-        }
-    }
-    
-    /* No landing pad found, continue unwinding. */
-    return _URC_CONTINUE_UNWIND;
-}
-