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/*
Copyright (C) 2010-2011 David Anderson.
This program is free software; you can redistribute it and/or modify it
under the terms of version 2 of the GNU General Public License as
published by the Free Software Foundation.
This program is distributed in the hope that it would be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
You should have received a copy of the GNU General Public License along
with this program; if not, write the Free Software Foundation, Inc., 51
Franklin Street - Fifth Floor, Boston MA 02110-1301, USA.
*/
//
// irepframe.h
//
class IRCie {
public:
IRCie(): cie_byte_length_(0), version_(0),
code_alignment_factor_(1),
data_alignment_factor_(1),
return_address_register_rule_(0)
{};
IRCie(Dwarf_Unsigned length, Dwarf_Unsigned version,
const std::string &augmentation, Dwarf_Unsigned code_align,
Dwarf_Signed data_align, Dwarf_Half return_reg_rule,
const void * init_instrs, Dwarf_Unsigned instrs_len):
cie_byte_length_(length), version_(version),
augmentation_(augmentation), code_alignment_factor_(code_align),
data_alignment_factor_(data_align),
return_address_register_rule_(return_reg_rule)
{
const Dwarf_Small *x =
reinterpret_cast<const Dwarf_Small *>(init_instrs);
for(Dwarf_Unsigned i = 0; i < instrs_len; ++i) {
initial_instructions_.push_back(x[i]);
}
}
void insert_fde_index(unsigned i) { fde_index_.push_back(i); };
~IRCie() {};
void get_basic_cie_data(Dwarf_Unsigned * version,
std::string * aug,
Dwarf_Unsigned * code_align,
Dwarf_Signed * data_align,
Dwarf_Half * ret_addr_reg) {
*version = version_;
*aug = augmentation_;
*code_align = code_alignment_factor_;
*data_align = data_alignment_factor_;
*ret_addr_reg = return_address_register_rule_;
}
void get_init_instructions(Dwarf_Unsigned *len,
void **bytes) {
*len = initial_instructions_.size();
*bytes = reinterpret_cast<void *>(&initial_instructions_[0]);
};
private:
// Byte length 0 if not known yet.
Dwarf_Unsigned cie_byte_length_;
Dwarf_Unsigned version_;
std::string augmentation_;
Dwarf_Unsigned code_alignment_factor_;
Dwarf_Signed data_alignment_factor_;
Dwarf_Half return_address_register_rule_;
std::vector<Dwarf_Small> initial_instructions_;
// fde_index is the array of indexes into fdedata_
// that are fdes used by this cie.
std::vector<unsigned> fde_index_;
};
class IRFde {
public:
IRFde(): low_pc_(0), func_length_(0),
cie_offset_(0), cie_index_(-1),
fde_offset_(0) {};
IRFde(Dwarf_Addr low_pc,Dwarf_Unsigned func_length,
Dwarf_Ptr fde_bytes, Dwarf_Unsigned fde_length,
Dwarf_Off cie_offset,Dwarf_Signed cie_index,
Dwarf_Off fde_offset): low_pc_(low_pc), func_length_(func_length),
cie_offset_(cie_offset), cie_index_(cie_index),
fde_offset_(fde_offset) {
const Dwarf_Small *x =
reinterpret_cast<const Dwarf_Small *>(fde_bytes);
for(Dwarf_Unsigned i = 0; i < fde_length; ++i) {
fde_bytes_.push_back(x[i]);
}
};
~IRFde() {};
Dwarf_Signed cie_index() { return cie_index_; };
void get_fde_base_data(Dwarf_Addr *lowpc, Dwarf_Unsigned * funclen,
Dwarf_Signed *cie_index_input) {
*lowpc = low_pc_;
*funclen = func_length_;
*cie_index_input = cie_index_;
};
void get_fde_instrs_into_ir(Dwarf_Ptr ip,Dwarf_Unsigned len ) {
const Dwarf_Small *x =
reinterpret_cast<const Dwarf_Small *>(ip);
for(Dwarf_Unsigned i = 0; i < len; ++i) {
fde_instrs_.push_back(x[i]);
}
};
void get_fde_instructions(Dwarf_Unsigned *len,
void **bytes) {
*len = fde_instrs_.size();
*bytes = reinterpret_cast<void *>(&fde_instrs_[0]);
};
void fde_instrs () {
};
private:
Dwarf_Addr low_pc_;
Dwarf_Unsigned func_length_;
// fde_bytes_ may be empty if content bytes not yet created.
std::vector<Dwarf_Small> fde_bytes_;
std::vector<Dwarf_Small> fde_instrs_;
// cie_offset may be 0 if not known yet.
Dwarf_Off cie_offset_;
// cie_index is the index in ciedata_ of
// the applicable CIE. Begins with index 0.
Dwarf_Signed cie_index_;
// fde_offset may be 0 if not yet known.
Dwarf_Off fde_offset_;
};
class IRFrame {
public:
IRFrame() {};
~IRFrame() {};
void insert_cie(IRCie &cie) {
ciedata_.push_back(cie);
}
void insert_fde(IRFde &fdedata) {
fdedata_.push_back(fdedata);
unsigned findex = fdedata_.size() -1;
Dwarf_Signed cindex = fdedata.cie_index();
if( cindex != -1) {
IRCie & mycie = ciedata_[cindex];
mycie.insert_fde_index(findex);
}
}
std::vector<IRCie> &get_cie_vec() { return ciedata_; };
std::vector<IRFde> &get_fde_vec() { return fdedata_; };
private:
std::vector<IRCie> ciedata_;
std::vector<IRFde> fdedata_;
};
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