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This commit is contained in:
David Anderson 2008-11-11 01:37:24 -08:00
commit c880919466
1 changed files with 391 additions and 371 deletions
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62
editor/ida/gcc_fpic.idc
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@ -5,8 +5,15 @@
// Desc: Add references for strings, variables, and other data that seem mangled
// due to GCC's -fPIC option and the .got section of an x86 ELF binary.
//
// Version 1.0 - November 22, 2007
// Version 1.1 - May 02, 2008 - Now works with GCC 4.x compiled binaries
// Version History
// 1.0 [2007-11-22]
// - Initial Version
// 1.1 [2008-05-02]
// - Now works with GCC 4.x compiled binaries
// 1.2 [2008-11-06]
// - Now works with GCC 4.3 compiled binaries
// - Fixed: Redefining alignment blocks as data caused IDA to pop up
// an annoying warning
// -----------------------------------------------------------------------------
#include <idc.idc>
@ -123,7 +130,7 @@ static main()
}
/* Get current PIC register */
reg = GetPICRegister(addr, reg);
reg = GetPICRegister(addr, reg, funcend);
if (reg != REG_NONE)
{
@ -173,6 +180,10 @@ static main()
{
/* Create a name based on the address */
opstr = form("unk_%X", dataAddr);
if (strstr(GetDisasm(dataAddr), "align") != -1)
{
MakeUnkn(dataAddr, DOUNK_SIMPLE);
}
MakeNameEx(dataAddr, opstr, SN_NOCHECK|SN_NOLIST|SN_NOWARN);
opformat = OPFORMAT_DEREF;
}
@ -188,6 +199,10 @@ static main()
{
/* If name doesn't exist for that, then create name based on address */
opstr = form("unk_%X", dataAddr);
if (strstr(GetDisasm(dataAddr), "align") != -1)
{
MakeUnkn(dataAddr, DOUNK_SIMPLE);
}
MakeNameEx(dataAddr, opstr, SN_NOCHECK|SN_NOLIST|SN_NOWARN);
opformat = OPFORMAT_DEREF;
}
@ -255,32 +270,37 @@ static main()
* Tries to determine the current PIC register given the current address being processed
* and the previous PIC register.
*/
static GetPICRegister(addr, previous)
static GetPICRegister(addr, previous, funcend)
{
auto assemblyStr, idx, reg;
auto assemblyStr, idx, reg, ab;
assemblyStr = GetDisasm(addr);
if ((idx = strstr(assemblyStr, "call __i686_get_pc_thunk_")) != -1)
{
/* 28 is the length of the above string */
reg = substr(assemblyStr, idx + 28, 30);
}
else if (strstr(assemblyStr, "call $+5") != -1)
{
assemblyStr = GetDisasm(NextHead(addr, funcend));
reg = substr(assemblyStr, 9, 11);
}
if (reg == "ax")
{
return REG_EAX;
}
else if (reg == "bx")
{
return REG_EBX;
}
else if (reg == "cx")
{
return REG_ECX;
}
else if (reg == "dx")
{
return REG_EDX;
}
if (reg == "ax")
{
return REG_EAX;
}
else if (reg == "bx")
{
return REG_EBX;
}
else if (reg == "cx")
{
return REG_ECX;
}
else if (reg == "dx")
{
return REG_EDX;
}
return previous;