DBT-RISE/DBT-RISE-TGC
12
0
Fork 0
Code Issues 1 Pull Requests 1 Projects Releases Wiki Activity

fix elf loader and pmp check for debug accesses

Browse Source
This commit is contained in:
Eyck Jentzsch
2021-08-19 10:49:33 +02:00
parent e934049dd4
commit 2f05083cf0
4 changed files with 95 additions and 28 deletions
Download Patch File Download Diff File Expand all files Collapse all files

30
incl/iss/arch/riscv_hart_m_p.h
View File

@ -388,6 +388,7 @@ template <typename BASE> std::pair<uint64_t, bool> riscv_hart_m_p<BASE>::load_fi
if (sizeof(reg_t) == 4) throw std::runtime_error("wrong elf class in file");
if (reader.get_type() != ET_EXEC) throw std::runtime_error("wrong elf type in file");
if (reader.get_machine() != EM_RISCV) throw std::runtime_error("wrong elf machine in file");
auto entry = reader.get_entry();
for (const auto pseg : reader.segments) {
const auto fsize = pseg->get_file_size(); // 0x42c/0x0
const auto seg_data = pseg->get_data();
@ -400,14 +401,35 @@ template <typename BASE> std::pair<uint64_t, bool> riscv_hart_m_p<BASE>::load_fi
<< pseg->get_physical_address();
}
}
for (const auto sec : reader.sections) {
if (sec->get_name() == ".tohost") {
for(const auto sec : reader.sections) {
if(sec->get_name() == ".symtab") {
if ( SHT_SYMTAB == sec->get_type() ||
SHT_DYNSYM == sec->get_type() ) {
ELFIO::symbol_section_accessor symbols( reader, sec );
auto sym_no = symbols.get_symbols_num();
std::string name;
ELFIO::Elf64_Addr value = 0;
ELFIO::Elf_Xword size = 0;
unsigned char bind = 0;
unsigned char type = 0;
ELFIO::Elf_Half section = 0;
unsigned char other = 0;
for ( auto i = 0U; i < sym_no; ++i ) {
symbols.get_symbol( i, name, value, size, bind, type, section, other );
if(name=="tohost") {
tohost = value;
} else if(name=="fromhost") {
fromhost = value;
}
}
}
} else if (sec->get_name() == ".tohost") {
tohost = sec->get_address();
fromhost = tohost + 0x40;
}
}
return std::make_pair(reader.get_entry(), true);
}
return std::make_pair(entry, true);
}
throw std::runtime_error("memory load file is not a valid elf file");
}

36
incl/iss/arch/riscv_hart_msu_vp.h
View File

@ -531,6 +531,7 @@ template <typename BASE> std::pair<uint64_t, bool> riscv_hart_msu_vp<BASE>::load
if (sizeof(reg_t) == 4) throw std::runtime_error("wrong elf class in file");
if (reader.get_type() != ET_EXEC) throw std::runtime_error("wrong elf type in file");
if (reader.get_machine() != EM_RISCV) throw std::runtime_error("wrong elf machine in file");
auto entry = reader.get_entry();
for (const auto pseg : reader.segments) {
const auto fsize = pseg->get_file_size(); // 0x42c/0x0
const auto seg_data = pseg->get_data();
@ -543,14 +544,35 @@ template <typename BASE> std::pair<uint64_t, bool> riscv_hart_msu_vp<BASE>::load
<< pseg->get_physical_address();
}
}
for (const auto sec : reader.sections) {
if (sec->get_name() == ".tohost") {
for(const auto sec : reader.sections) {
if(sec->get_name() == ".symtab") {
if ( SHT_SYMTAB == sec->get_type() ||
SHT_DYNSYM == sec->get_type() ) {
ELFIO::symbol_section_accessor symbols( reader, sec );
auto sym_no = symbols.get_symbols_num();
std::string name;
ELFIO::Elf64_Addr value = 0;
ELFIO::Elf_Xword size = 0;
unsigned char bind = 0;
unsigned char type = 0;
ELFIO::Elf_Half section = 0;
unsigned char other = 0;
for ( auto i = 0U; i < sym_no; ++i ) {
symbols.get_symbol( i, name, value, size, bind, type, section, other );
if(name=="tohost") {
tohost = value;
} else if(name=="fromhost") {
fromhost = value;
}
}
}
} else if (sec->get_name() == ".tohost") {
tohost = sec->get_address();
fromhost = tohost + 0x40;
}
}
return std::make_pair(reader.get_entry(), true);
}
return std::make_pair(entry, true);
}
throw std::runtime_error("memory load file is not a valid elf file");
}
@ -1296,9 +1318,6 @@ template <typename BASE> uint64_t riscv_hart_msu_vp<BASE>::enter_trap(uint64_t f
// bits in mtvec
this->reg.NEXT_PC = ivec & ~0x3UL;
if ((ivec & 0x1) == 1 && trap_id != 0) this->reg.NEXT_PC += 4 * cause;
// reset trap state
this->reg.PRIV = new_priv;
this->reg.trap_state = 0;
std::array<char, 32> buffer;
sprintf(buffer.data(), "0x%016lx", addr);
if((flags&0xffffffff) != 0xffffffff)
@ -1306,6 +1325,9 @@ template <typename BASE> uint64_t riscv_hart_msu_vp<BASE>::enter_trap(uint64_t f
<< (trap_id ? irq_str[cause] : trap_str[cause]) << "' (" << cause << ")"
<< " at address " << buffer.data() << " occurred, changing privilege level from "
<< lvl[cur_priv] << " to " << lvl[new_priv];
// reset trap state
this->reg.PRIV = new_priv;
this->reg.trap_state = 0;
update_vm_info();
return this->reg.NEXT_PC;
}

47
incl/iss/arch/riscv_hart_mu_p.h
View File

@ -484,6 +484,7 @@ template <typename BASE, features_e FEAT> std::pair<uint64_t, bool> riscv_hart_m
if (sizeof(reg_t) == 4) throw std::runtime_error("wrong elf class in file");
if (reader.get_type() != ET_EXEC) throw std::runtime_error("wrong elf type in file");
if (reader.get_machine() != EM_RISCV) throw std::runtime_error("wrong elf machine in file");
auto entry = reader.get_entry();
for (const auto pseg : reader.segments) {
const auto fsize = pseg->get_file_size(); // 0x42c/0x0
const auto seg_data = pseg->get_data();
@ -496,14 +497,35 @@ template <typename BASE, features_e FEAT> std::pair<uint64_t, bool> riscv_hart_m
<< pseg->get_physical_address();
}
}
for (const auto sec : reader.sections) {
if (sec->get_name() == ".tohost") {
for(const auto sec : reader.sections) {
if(sec->get_name() == ".symtab") {
if ( SHT_SYMTAB == sec->get_type() ||
SHT_DYNSYM == sec->get_type() ) {
ELFIO::symbol_section_accessor symbols( reader, sec );
auto sym_no = symbols.get_symbols_num();
std::string name;
ELFIO::Elf64_Addr value = 0;
ELFIO::Elf_Xword size = 0;
unsigned char bind = 0;
unsigned char type = 0;
ELFIO::Elf_Half section = 0;
unsigned char other = 0;
for ( auto i = 0U; i < sym_no; ++i ) {
symbols.get_symbol( i, name, value, size, bind, type, section, other );
if(name=="tohost") {
tohost = value;
} else if(name=="fromhost") {
fromhost = value;
}
}
}
} else if (sec->get_name() == ".tohost") {
tohost = sec->get_address();
fromhost = tohost + 0x40;
}
}
return std::make_pair(reader.get_entry(), true);
}
return std::make_pair(entry, true);
}
throw std::runtime_error("memory load file is not a valid elf file");
}
@ -525,8 +547,9 @@ template <typename BASE, features_e FEAT> bool riscv_hart_mu_p<BASE, FEAT>::pmp_
reg_t tor = csr[pmpaddr0+i] << PMP_SHIFT;
uint8_t cfg = csr[pmpcfg0+(i/4)]>>(i%4);
if (cfg & PMP_A) {
bool is_tor = (cfg & PMP_A) == PMP_TOR;
bool is_na4 = (cfg & PMP_A) == PMP_NA4;
auto pmp_a = (cfg & PMP_A) >> 3;
bool is_tor = pmp_a == PMP_TOR;
bool is_na4 = pmp_a == PMP_NA4;
reg_t mask = (csr[pmpaddr0+i] << 1) | (!is_na4);
mask = ~(mask & ~(mask + 1)) << PMP_SHIFT;
@ -574,7 +597,7 @@ iss::status riscv_hart_mu_p<BASE, FEAT>::read(const address_type type, const acc
switch (space) {
case traits<BASE>::MEM: {
if(FEAT & FEAT_PMP){
if(!pmp_check(access, addr, length)) {
if(!pmp_check(access, addr, length) && (access&access_type::DEBUG) != access_type::DEBUG) {
fault_data = addr;
if (access && iss::access_type::DEBUG) throw trap_access(0, addr);
this->reg.trap_state = (1 << 31) | (1 << 16); // issue trap 1
@ -669,7 +692,7 @@ iss::status riscv_hart_mu_p<BASE, FEAT>::write(const address_type type, const ac
switch (space) {
case traits<BASE>::MEM: {
if(FEAT & FEAT_PMP){
if(!pmp_check(access, addr, length)) {
if(!pmp_check(access, addr, length) && (access&access_type::DEBUG) != access_type::DEBUG) {
fault_data = addr;
if (access && iss::access_type::DEBUG) throw trap_access(0, addr);
this->reg.trap_state = (1 << 31) | (1 << 16); // issue trap 1
@ -683,7 +706,7 @@ iss::status riscv_hart_mu_p<BASE, FEAT>::write(const address_type type, const ac
return iss::Err;
}
try {
if(length>1 && (addr&(length-1))){
if(length>1 && (addr&(length-1)) && (access&access_type::DEBUG) != access_type::DEBUG){
this->reg.trap_state = 1<<31 | 6<<16;
fault_data=addr;
return iss::Err;
@ -1217,9 +1240,6 @@ template <typename BASE, features_e FEAT> uint64_t riscv_hart_mu_p<BASE, FEAT>::
// bits in mtvec
this->reg.NEXT_PC = ivec & ~0x3UL;
if ((ivec & 0x1) == 1 && trap_id != 0) this->reg.NEXT_PC += 4 * cause;
// reset trap state
this->reg.PRIV = new_priv;
this->reg.trap_state = 0;
std::array<char, 32> buffer;
sprintf(buffer.data(), "0x%016lx", addr);
if((flags&0xffffffff) != 0xffffffff)
@ -1227,6 +1247,9 @@ template <typename BASE, features_e FEAT> uint64_t riscv_hart_mu_p<BASE, FEAT>::
<< (trap_id ? irq_str[cause] : trap_str[cause]) << "' (" << cause << ")"
<< " at address " << buffer.data() << " occurred, changing privilege level from "
<< lvl[this->reg.PRIV] << " to " << lvl[new_priv];
// reset trap state
this->reg.PRIV = new_priv;
this->reg.trap_state = 0;
return this->reg.NEXT_PC;
}