mirror of
https://github.com/reactos/reactos.git
synced 2024-11-09 08:08:38 +00:00
661 lines
16 KiB
C
661 lines
16 KiB
C
/*
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* Dwarf info parse and search.
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*/
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#define NTOSAPI
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#include <ntifs.h>
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#include <ndk/ntndk.h>
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#include <reactos/rossym.h>
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#include "rossympriv.h"
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#include <ntimage.h>
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#define NDEBUG
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#include <debug.h>
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#include "dwarf.h"
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#include <windef.h>
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enum
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{
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DwarfAttrSibling = 0x01,
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DwarfAttrLocation = 0x02,
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DwarfAttrName = 0x03,
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DwarfAttrOrdering = 0x09,
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DwarfAttrByteSize = 0x0B,
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DwarfAttrBitOffset = 0x0C,
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DwarfAttrBitSize = 0x0D,
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DwarfAttrStmtList = 0x10,
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DwarfAttrLowpc = 0x11,
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DwarfAttrHighpc = 0x12,
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DwarfAttrLanguage = 0x13,
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DwarfAttrDiscr = 0x15,
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DwarfAttrDiscrValue = 0x16,
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DwarfAttrVisibility = 0x17,
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DwarfAttrImport = 0x18,
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DwarfAttrStringLength = 0x19,
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DwarfAttrCommonRef = 0x1A,
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DwarfAttrCompDir = 0x1B,
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DwarfAttrConstValue = 0x1C,
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DwarfAttrContainingType = 0x1D,
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DwarfAttrDefaultValue = 0x1E,
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DwarfAttrInline = 0x20,
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DwarfAttrIsOptional = 0x21,
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DwarfAttrLowerBound = 0x22,
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DwarfAttrProducer = 0x25,
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DwarfAttrPrototyped = 0x27,
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DwarfAttrReturnAddr = 0x2A,
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DwarfAttrStartScope = 0x2C,
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DwarfAttrStrideSize = 0x2E,
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DwarfAttrUpperBound = 0x2F,
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DwarfAttrAbstractOrigin = 0x31,
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DwarfAttrAccessibility = 0x32,
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DwarfAttrAddrClass = 0x33,
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DwarfAttrArtificial = 0x34,
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DwarfAttrBaseTypes = 0x35,
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DwarfAttrCalling = 0x36,
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DwarfAttrCount = 0x37,
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DwarfAttrDataMemberLoc = 0x38,
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DwarfAttrDeclColumn = 0x39,
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DwarfAttrDeclFile = 0x3A,
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DwarfAttrDeclLine = 0x3B,
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DwarfAttrDeclaration = 0x3C,
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DwarfAttrDiscrList = 0x3D,
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DwarfAttrEncoding = 0x3E,
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DwarfAttrExternal = 0x3F,
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DwarfAttrFrameBase = 0x40,
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DwarfAttrFriend = 0x41,
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DwarfAttrIdentifierCase = 0x42,
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DwarfAttrMacroInfo = 0x43,
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DwarfAttrNamelistItem = 0x44,
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DwarfAttrPriority = 0x45,
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DwarfAttrSegment = 0x46,
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DwarfAttrSpecification = 0x47,
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DwarfAttrStaticLink = 0x48,
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DwarfAttrType = 0x49,
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DwarfAttrUseLocation = 0x4A,
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DwarfAttrVarParam = 0x4B,
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DwarfAttrVirtuality = 0x4C,
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DwarfAttrVtableElemLoc = 0x4D,
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DwarfAttrAllocated = 0x4E,
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DwarfAttrAssociated = 0x4F,
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DwarfAttrDataLocation = 0x50,
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DwarfAttrStride = 0x51,
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DwarfAttrEntrypc = 0x52,
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DwarfAttrUseUTF8 = 0x53,
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DwarfAttrExtension = 0x54,
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DwarfAttrRanges = 0x55,
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DwarfAttrTrampoline = 0x56,
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DwarfAttrCallColumn = 0x57,
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DwarfAttrCallFile = 0x58,
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DwarfAttrCallLine = 0x59,
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DwarfAttrDescription = 0x5A,
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DwarfAttrMax,
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FormAddr = 0x01,
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FormDwarfBlock2 = 0x03,
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FormDwarfBlock4 = 0x04,
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FormData2 = 0x05,
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FormData4 = 0x06,
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FormData8 = 0x07,
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FormString = 0x08,
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FormDwarfBlock = 0x09,
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FormDwarfBlock1 = 0x0A,
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FormData1 = 0x0B,
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FormFlag = 0x0C,
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FormSdata = 0x0D,
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FormStrp = 0x0E,
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FormUdata = 0x0F,
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FormRefAddr = 0x10,
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FormRef1 = 0x11,
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FormRef2 = 0x12,
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FormRef4 = 0x13,
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FormRef8 = 0x14,
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FormRefUdata = 0x15,
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FormIndirect = 0x16
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};
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static int parseattrs(DwarfBuf*, ulong, DwarfAbbrev*, DwarfAttrs*);
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static int getulong(DwarfBuf*, int, ulong, ulong*, int*);
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static int getuchar(DwarfBuf*, int, uchar*);
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static int getstring(DwarfBuf*, int, char**);
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static int getblock(DwarfBuf*, int, DwarfBlock*);
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static int skipform(DwarfBuf*, int);
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static int constblock(Dwarf*, DwarfBlock*, ulong*);
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int
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dwarflookupnameinunit(Dwarf *d, ulong unit, char *name, DwarfSym *s)
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{
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if(dwarfenumunit(d, unit, s) < 0)
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return -1;
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dwarfnextsymat(d, s, 0); /* s is now the CompileUnit */
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while(dwarfnextsymat(d, s, 1) == 1)
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if(s->attrs.name && strcmp(s->attrs.name, name) == 0)
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return 0;
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werrstr("symbol '%s' not found", name);
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return -1;
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}
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int
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dwarflookupsubname(Dwarf *d, DwarfSym *parent, char *name, DwarfSym *s)
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{
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*s = *parent;
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while(dwarfnextsymat(d, s, parent->depth+1))
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if(s->attrs.name && strcmp(s->attrs.name, name) == 0)
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return 0;
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werrstr("symbol '%s' not found", name);
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return -1;
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}
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int
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dwarflookuptag(Dwarf *d, ulong unit, ulong tag, DwarfSym *s)
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{
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if(dwarfenumunit(d, unit, s) < 0) {
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return -1;
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}
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dwarfnextsymat(d, s, 0); /* s is now the CompileUnit */
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if(s->attrs.tag == tag) {
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return 0;
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}
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while(dwarfnextsymat(d, s, 1) == 1)
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if(s->attrs.tag == tag) {
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return 0;
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}
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werrstr("symbol with tag 0x%lux not found", tag);
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return -1;
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}
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int
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dwarfseeksym(Dwarf *d, ulong unit, ulong off, DwarfSym *s)
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{
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if(dwarfenumunit(d, unit, s) < 0)
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return -1;
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s->b.p = d->info.data + unit + off;
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if(dwarfnextsymat(d, s, 0) != 1)
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return -1;
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return 0;
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}
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int
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dwarflookupfn(Dwarf *d, ulong unit, ulong pc, DwarfSym *s)
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{
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if(dwarfenumunit(d, unit, s) < 0)
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return -1;
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if(dwarfnextsymat(d, s, 0) != 1)
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return -1;
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/* s is now the CompileUnit */
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while(dwarfnextsymat(d, s, 1) == 1){
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if(s->attrs.tag != TagSubprogram)
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continue;
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if(s->attrs.lowpc <= pc && pc < s->attrs.highpc)
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return 0;
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}
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werrstr("fn containing pc 0x%lux not found", pc);
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return -1;
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}
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int
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dwarfenumunit(Dwarf *d, ulong unit, DwarfSym *s)
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{
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int i;
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ulong aoff, len;
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if(unit >= d->info.len){
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werrstr("dwarf unit address 0x%x >= 0x%x out of range", unit, d->info.len);
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return -1;
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}
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memset(s, 0, sizeof *s);
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memset(&s->b, 0, sizeof s->b);
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s->b.d = d;
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s->b.p = d->info.data + unit;
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s->b.ep = d->info.data + d->info.len;
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len = dwarfget4(&s->b);
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s->nextunit = unit + 4 + len;
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if(s->b.ep - s->b.p < len){
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badheader:
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werrstr("bad dwarf unit header at unit 0x%lux", unit);
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return -1;
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}
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s->b.ep = s->b.p+len;
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if((i=dwarfget2(&s->b)) != 2)
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goto badheader;
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aoff = dwarfget4(&s->b);
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s->b.addrsize = dwarfget1(&s->b);
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if(d->addrsize == 0)
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d->addrsize = s->b.addrsize;
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if(s->b.p == nil)
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goto badheader;
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s->aoff = aoff;
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s->unit = unit;
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s->depth = 0;
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return 0;
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}
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int
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dwarfenum(Dwarf *d, DwarfSym *s)
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{
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if(dwarfenumunit(d, 0, s) < 0)
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return -1;
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s->allunits = 1;
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return 0;
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}
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int
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dwarfnextsym(Dwarf *d, DwarfSym *s)
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{
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ulong num;
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DwarfAbbrev *a;
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if(s->attrs.haskids)
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s->depth++;
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top:
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if(s->b.p >= s->b.ep){
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if(s->allunits && s->nextunit < d->info.len){
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if(dwarfenumunit(d, s->nextunit, s) < 0) {
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return -1;
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}
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s->allunits = 1;
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goto top;
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}
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return 0;
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}
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s->uoff = s->b.p - (d->info.data+s->unit);
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num = dwarfget128(&s->b);
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if(num == 0){
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if(s->depth == 0) {
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return 0;
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}
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if(s->depth > 0)
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s->depth--;
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goto top;
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}
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a = dwarfgetabbrev(d, s->aoff, num);
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if(a == nil){
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werrstr("getabbrev %ud %ud for %ud,%ud: %r\n", s->aoff, num, s->unit, s->uoff);
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return -1;
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}
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if(parseattrs(&s->b, s->unit, a, &s->attrs) < 0) {
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return -1;
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}
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return 1;
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}
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int
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dwarfnextsymat(Dwarf *d, DwarfSym *s, int depth)
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{
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int r;
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DwarfSym t;
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uint sib;
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if(s->depth == depth && s->attrs.have.sibling){
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sib = s->attrs.sibling;
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if(sib < d->info.len && d->info.data+sib >= s->b.p)
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s->b.p = d->info.data+sib;
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s->attrs.haskids = 0;
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}
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/*
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* The funny game with t and s make sure that
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* if we get to the end of a run of a particular
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* depth, we leave s so that a call to nextsymat with depth-1
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* will actually produce the desired guy. We could change
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* the interface to dwarfnextsym instead, but I'm scared
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* to touch it.
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*/
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t = *s;
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for(;;){
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if((r = dwarfnextsym(d, &t)) != 1) {
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return r;
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}
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if(t.depth < depth){
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/* went too far - nothing to see */
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return 0;
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}
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*s = t;
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if(t.depth == depth) {
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return 1;
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}
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}
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}
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typedef struct Parse Parse;
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struct Parse {
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int name;
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int off;
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int haveoff;
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int type;
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};
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#define OFFSET(x) offsetof(DwarfAttrs, x), offsetof(DwarfAttrs, have.x)
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static Parse plist[] = { /* Font Tab 4 */
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{ DwarfAttrAbstractOrigin, OFFSET(abstractorigin), TReference },
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{ DwarfAttrAccessibility, OFFSET(accessibility), TConstant },
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{ DwarfAttrAddrClass, OFFSET(addrclass), TConstant },
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{ DwarfAttrArtificial, OFFSET(isartificial), TFlag },
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{ DwarfAttrBaseTypes, OFFSET(basetypes), TReference },
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{ DwarfAttrBitOffset, OFFSET(bitoffset), TConstant },
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{ DwarfAttrBitSize, OFFSET(bitsize), TConstant },
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{ DwarfAttrByteSize, OFFSET(bytesize), TConstant },
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{ DwarfAttrCalling, OFFSET(calling), TConstant },
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{ DwarfAttrCommonRef, OFFSET(commonref), TReference },
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{ DwarfAttrCompDir, OFFSET(compdir), TString },
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{ DwarfAttrConstValue, OFFSET(constvalue), TString|TConstant|TBlock },
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{ DwarfAttrContainingType, OFFSET(containingtype), TReference },
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{ DwarfAttrCount, OFFSET(count), TConstant|TReference },
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{ DwarfAttrDataMemberLoc, OFFSET(datamemberloc), TBlock|TConstant|TReference },
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{ DwarfAttrDeclColumn, OFFSET(declcolumn), TConstant },
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{ DwarfAttrDeclFile, OFFSET(declfile), TConstant },
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{ DwarfAttrDeclLine, OFFSET(declline), TConstant },
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{ DwarfAttrDeclaration, OFFSET(isdeclaration), TFlag },
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{ DwarfAttrDefaultValue, OFFSET(defaultvalue), TReference },
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{ DwarfAttrDiscr, OFFSET(discr), TReference },
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{ DwarfAttrDiscrList, OFFSET(discrlist), TBlock },
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{ DwarfAttrDiscrValue, OFFSET(discrvalue), TConstant },
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{ DwarfAttrEncoding, OFFSET(encoding), TConstant },
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{ DwarfAttrExternal, OFFSET(isexternal), TFlag },
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{ DwarfAttrFrameBase, OFFSET(framebase), TBlock|TConstant },
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{ DwarfAttrFriend, OFFSET(friend), TReference },
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{ DwarfAttrHighpc, OFFSET(highpc), TAddress },
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{ DwarfAttrEntrypc, OFFSET(entrypc), TAddress },
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{ DwarfAttrIdentifierCase, OFFSET(identifiercase), TConstant },
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{ DwarfAttrImport, OFFSET(import), TReference },
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{ DwarfAttrInline, OFFSET(inlined), TConstant },
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{ DwarfAttrIsOptional, OFFSET(isoptional), TFlag },
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{ DwarfAttrLanguage, OFFSET(language), TConstant },
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{ DwarfAttrLocation, OFFSET(location), TBlock|TConstant },
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{ DwarfAttrLowerBound, OFFSET(lowerbound), TConstant|TReference },
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{ DwarfAttrLowpc, OFFSET(lowpc), TAddress },
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{ DwarfAttrMacroInfo, OFFSET(macroinfo), TConstant },
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{ DwarfAttrName, OFFSET(name), TString },
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{ DwarfAttrNamelistItem, OFFSET(namelistitem), TBlock },
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{ DwarfAttrOrdering, OFFSET(ordering), TConstant },
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{ DwarfAttrPriority, OFFSET(priority), TReference },
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{ DwarfAttrProducer, OFFSET(producer), TString },
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{ DwarfAttrPrototyped, OFFSET(isprototyped), TFlag },
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{ DwarfAttrRanges, OFFSET(ranges), TReference },
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{ DwarfAttrReturnAddr, OFFSET(returnaddr), TBlock|TConstant },
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{ DwarfAttrSegment, OFFSET(segment), TBlock|TConstant },
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{ DwarfAttrSibling, OFFSET(sibling), TReference },
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{ DwarfAttrSpecification, OFFSET(specification), TReference },
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{ DwarfAttrStartScope, OFFSET(startscope), TConstant },
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{ DwarfAttrStaticLink, OFFSET(staticlink), TBlock|TConstant },
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{ DwarfAttrStmtList, OFFSET(stmtlist), TConstant },
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{ DwarfAttrStrideSize, OFFSET(stridesize), TConstant },
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{ DwarfAttrStringLength, OFFSET(stringlength), TBlock|TConstant },
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{ DwarfAttrType, OFFSET(type), TReference },
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{ DwarfAttrUpperBound, OFFSET(upperbound), TConstant|TReference },
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{ DwarfAttrUseLocation, OFFSET(uselocation), TBlock|TConstant },
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{ DwarfAttrVarParam, OFFSET(isvarparam), TFlag },
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{ DwarfAttrVirtuality, OFFSET(virtuality), TConstant },
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{ DwarfAttrVisibility, OFFSET(visibility), TConstant },
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{ DwarfAttrVtableElemLoc, OFFSET(vtableelemloc), TBlock|TReference },
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{ }
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};
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static Parse ptab[DwarfAttrMax];
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static int
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parseattrs(DwarfBuf *b, ulong unit, DwarfAbbrev *a, DwarfAttrs *attrs)
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{
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int i, f, n, got;
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static int nbad;
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void *v;
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/* initialize ptab first time through for quick access */
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if(ptab[DwarfAttrName].name != DwarfAttrName)
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for(i=0; plist[i].name; i++)
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ptab[plist[i].name] = plist[i];
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memset(attrs, 0, sizeof *attrs);
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attrs->tag = a->tag;
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attrs->haskids = a->haskids;
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for(i=0; i<a->nattr; i++){
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n = a->attr[i].name;
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f = a->attr[i].form;
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if(n < 0 || n >= DwarfAttrMax || ptab[n].name==0){
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if(++nbad == 1)
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werrstr("dwarf parse attrs: unexpected attribute name 0x%x", n);
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continue; //return -1;
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}
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v = (char*)attrs + ptab[n].off;
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got = 0;
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if(f == FormIndirect)
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f = dwarfget128(b);
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if((ptab[n].type&(TConstant|TReference|TAddress))
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&& getulong(b, f, unit, v, &got) >= 0)
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;
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else if((ptab[n].type&TFlag) && getuchar(b, f, v) >= 0)
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got = TFlag;
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else if((ptab[n].type&TString) && getstring(b, f, v) >= 0)
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got = TString;
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else if((ptab[n].type&TBlock) && getblock(b, f, v) >= 0)
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got = TBlock;
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else{
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if(skipform(b, f) < 0){
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if(++nbad == 1)
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werrstr("dwarf parse attrs: cannot skip form %d", f);
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return -1;
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}
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}
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if(got == TBlock && (ptab[n].type&TConstant))
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got = constblock(b->d, v, v);
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*((uchar*)attrs+ptab[n].haveoff) = got;
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}
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return 0;
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}
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static int
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getulong(DwarfBuf *b, int form, ulong unit, ulong *u, int *type)
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{
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static int nbad;
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uvlong uv;
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switch(form){
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default:
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return -1;
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/* addresses */
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case FormAddr:
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*type = TAddress;
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*u = dwarfgetaddr(b);
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return 0;
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/* references */
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case FormRefAddr:
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/* absolute ref in .debug_info */
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*type = TReference;
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*u = dwarfgetaddr(b);
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return 0;
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case FormRef1:
|
|
*u = dwarfget1(b);
|
|
goto relativeref;
|
|
case FormRef2:
|
|
*u = dwarfget2(b);
|
|
goto relativeref;
|
|
case FormRef4:
|
|
*u = dwarfget4(b);
|
|
goto relativeref;
|
|
case FormRef8:
|
|
*u = dwarfget8(b);
|
|
goto relativeref;
|
|
case FormRefUdata:
|
|
*u = dwarfget128(b);
|
|
relativeref:
|
|
*u += unit;
|
|
*type = TReference;
|
|
return 0;
|
|
|
|
/* constants */
|
|
case FormData1:
|
|
*u = dwarfget1(b);
|
|
goto constant;
|
|
case FormData2:
|
|
*u = dwarfget2(b);
|
|
goto constant;
|
|
case FormData4:
|
|
*u = dwarfget4(b);
|
|
goto constant;
|
|
case FormData8:
|
|
uv = dwarfget8(b);
|
|
*u = uv;
|
|
if(uv != *u && ++nbad == 1)
|
|
werrstr("dwarf: truncating 64-bit attribute constants");
|
|
goto constant;
|
|
case FormSdata:
|
|
*u = dwarfget128s(b);
|
|
goto constant;
|
|
case FormUdata:
|
|
*u = dwarfget128(b);
|
|
constant:
|
|
*type = TConstant;
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
static int
|
|
getuchar(DwarfBuf *b, int form, uchar *u)
|
|
{
|
|
switch(form){
|
|
default:
|
|
return -1;
|
|
|
|
case FormFlag:
|
|
*u = dwarfget1(b);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
static int
|
|
getstring(DwarfBuf *b, int form, char **s)
|
|
{
|
|
static int nbad;
|
|
ulong u;
|
|
|
|
switch(form){
|
|
default:
|
|
return -1;
|
|
|
|
case FormString:
|
|
*s = dwarfgetstring(b);
|
|
return 0;
|
|
|
|
case FormStrp:
|
|
u = dwarfget4(b);
|
|
if(u >= b->d->str.len){
|
|
if(++nbad == 1)
|
|
werrstr("dwarf: bad string pointer 0x%lux in attribute", u);
|
|
/* don't return error - maybe can proceed */
|
|
*s = nil;
|
|
}else
|
|
*s = (char*)b->d->str.data + u;
|
|
return 0;
|
|
|
|
}
|
|
}
|
|
|
|
static int
|
|
getblock(DwarfBuf *b, int form, DwarfBlock *bl)
|
|
{
|
|
ulong n;
|
|
|
|
switch(form){
|
|
default:
|
|
return -1;
|
|
case FormDwarfBlock:
|
|
n = dwarfget128(b);
|
|
goto copyn;
|
|
case FormDwarfBlock1:
|
|
n = dwarfget1(b);
|
|
goto copyn;
|
|
case FormDwarfBlock2:
|
|
n = dwarfget2(b);
|
|
goto copyn;
|
|
case FormDwarfBlock4:
|
|
n = dwarfget4(b);
|
|
copyn:
|
|
bl->data = dwarfgetnref(b, n);
|
|
bl->len = n;
|
|
if(bl->data == nil)
|
|
return -1;
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
static int
|
|
constblock(Dwarf *d, DwarfBlock *bl, ulong *pval)
|
|
{
|
|
DwarfBuf b;
|
|
|
|
memset(&b, 0, sizeof b);
|
|
b.p = bl->data;
|
|
b.ep = bl->data+bl->len;
|
|
b.d = d;
|
|
|
|
switch(dwarfget1(&b)){
|
|
case OpAddr:
|
|
*pval = dwarfgetaddr(&b);
|
|
return TConstant;
|
|
case OpConst1u:
|
|
*pval = dwarfget1(&b);
|
|
return TConstant;
|
|
case OpConst1s:
|
|
*pval = (schar)dwarfget1(&b);
|
|
return TConstant;
|
|
case OpConst2u:
|
|
*pval = dwarfget2(&b);
|
|
return TConstant;
|
|
case OpConst2s:
|
|
*pval = (s16int)dwarfget2(&b);
|
|
return TConstant;
|
|
case OpConst4u:
|
|
*pval = dwarfget4(&b);
|
|
return TConstant;
|
|
case OpConst4s:
|
|
*pval = (s32int)dwarfget4(&b);
|
|
return TConstant;
|
|
case OpConst8u:
|
|
*pval = (u64int)dwarfget8(&b);
|
|
return TConstant;
|
|
case OpConst8s:
|
|
*pval = (s64int)dwarfget8(&b);
|
|
return TConstant;
|
|
case OpConstu:
|
|
*pval = dwarfget128(&b);
|
|
return TConstant;
|
|
case OpConsts:
|
|
*pval = dwarfget128s(&b);
|
|
return TConstant;
|
|
case OpPlusUconst:
|
|
*pval = dwarfget128(&b);
|
|
return TConstant;
|
|
default:
|
|
return TBlock;
|
|
}
|
|
}
|
|
|
|
/* last resort */
|
|
static int
|
|
skipform(DwarfBuf *b, int form)
|
|
{
|
|
int type;
|
|
DwarfVal val;
|
|
|
|
if(getulong(b, form, 0, &val.c, &type) < 0
|
|
&& getuchar(b, form, (uchar*)&val) < 0
|
|
&& getstring(b, form, &val.s) < 0
|
|
&& getblock(b, form, &val.b) < 0)
|
|
return -1;
|
|
return 0;
|
|
}
|
|
|