CORE_ADDR
get_pc_function_start (CORE_ADDR pc)
{
struct block *bl;
struct minimal_symbol *msymbol;
bl = block_for_pc (pc);
if (bl)
{
struct symbol *symbol = block_function (bl);
if (symbol)
{
bl = SYMBOL_BLOCK_VALUE (symbol);
/* APPLE LOCAL begin address ranges */
return BLOCK_LOWEST_PC (bl);
/* APPLE LOCAL end address ranges */
}
}
msymbol = lookup_minimal_symbol_by_pc (pc);
if (msymbol)
{
CORE_ADDR fstart = SYMBOL_VALUE_ADDRESS (msymbol);
if (find_pc_section (fstart))
return fstart;
}
return 0;
}
CORE_ADDR
get_pc_function_start (CORE_ADDR pc)
{
struct block *bl;
struct minimal_symbol *msymbol;
bl = block_for_pc (pc);
if (bl)
{
struct symbol *symbol = block_function (bl);
if (symbol)
{
bl = SYMBOL_BLOCK_VALUE (symbol);
return BLOCK_START (bl);
}
}
msymbol = lookup_minimal_symbol_by_pc (pc);
if (msymbol)
{
CORE_ADDR fstart = SYMBOL_VALUE_ADDRESS (msymbol);
if (find_pc_section (fstart))
return fstart;
}
return 0;
}
//helper function. Retrieves an AES block, regardless of whether it is aligned or not with the underlying sector geometry
static inline int get_misaligned_block(ctr_crypto_interface *io, size_t sector, size_t sector_size, size_t block_size, uint8_t *buffer, void (*block_function)(void *io, void *buffer, uint64_t block, size_t block_count))
{
size_t sectors_to_copy_prior = get_chunks_to_complete_relative_chunk_backwards(sector, sector_size, block_size);
size_t sectors_to_copy_after = get_chunks_to_complete_relative_chunk(sector, sector_size, block_size);
if (!sectors_to_copy_after)
sectors_to_copy_after = block_size;
size_t sector_count = sectors_to_copy_prior + sectors_to_copy_after;
size_t buf_size = sector_count * sector_size;
uint8_t buf[buf_size];
int res = ctr_io_read_sector(io->lower_io, buf, buf_size, sector - sectors_to_copy_prior, sector_count);
if (res)
return res;
size_t current_block = get_prev_relative_chunk(sector, sector_size, block_size);
uint64_t block_pos = get_chunk_position(current_block, block_size);
uint64_t block_start_offset = block_pos - get_chunk_position(sector - sectors_to_copy_prior, sector_size);
uint8_t *pos = buf + block_start_offset;
block_function(io, pos, current_block, 1);
memcpy(buffer, pos, block_size);
return res;
}
struct symbol *
get_frame_function (struct frame_info *frame)
{
struct block *bl = get_frame_block (frame, 0);
if (bl == 0)
return 0;
return block_function (bl);
}
struct symbol *
find_pc_sect_function (CORE_ADDR pc, struct bfd_section *section)
{
struct block *b = block_for_pc_sect (pc, section);
if (b == 0)
return 0;
return block_function (b);
}
struct symbol *
find_pc_sect_function (CORE_ADDR pc, struct bfd_section *section)
{
/* APPLE LOCAL begin cache lookup values for improved performance */
struct block *b;
/* APPLE LOCAL inlined function symbols & blocks */
struct symbol *func_sym;
if (pc == last_function_lookup_pc
&& pc == last_mapped_section_lookup_pc
&& section == cached_mapped_section
&& cached_pc_function)
return cached_pc_function;
last_function_lookup_pc = pc;
b = block_for_pc_sect (pc, section);
if (b == 0)
{
cached_pc_function = NULL;
return 0;
}
/* APPLE LOCAL begin inlined function symbols & blocks */
func_sym = NULL;
if (BLOCK_FUNCTION (b) == 0)
{
/* APPLE LOCAL radar 6381384, add section to symtab lookups. */
func_sym = block_inlined_function (b, section);
}
if (!func_sym)
func_sym = block_function (b);
cached_pc_function = func_sym;
return func_sym;
/* APPLE LOCAL end inlined function symbols & blocks */
/* APPLE LOCAL end cache lookup values for improved performance */
}
CORE_ADDR
get_pc_function_start (CORE_ADDR pc)
{
register struct block *bl;
register struct symbol *symbol;
register struct minimal_symbol *msymbol;
CORE_ADDR fstart;
if ((bl = block_for_pc (pc)) != NULL &&
(symbol = block_function (bl)) != NULL)
{
bl = SYMBOL_BLOCK_VALUE (symbol);
fstart = BLOCK_START (bl);
}
else if ((msymbol = lookup_minimal_symbol_by_pc (pc)) != NULL)
{
fstart = SYMBOL_VALUE_ADDRESS (msymbol);
}
else
{
fstart = 0;
}
return (fstart);
}
int ctr_crypto_interface_read_sector(void *io, void *buffer, size_t buffer_size, size_t sector, size_t count)
{
int res = 0;
ctr_crypto_interface *crypto_io = io;
const size_t sector_size = ctr_io_sector_size(crypto_io->lower_io);
const size_t block_size = AES_BLOCK_SIZE;
size_t result_count = count < buffer_size/sector_size ? count : buffer_size/sector_size;
void (*block_function)(void *io, void *buffer, uint64_t block, size_t block_count);
block_function = output;
if (result_count)
{
size_t result_size = result_count * sector_size;
uint8_t *current_processed = buffer;
size_t current_block = get_prev_relative_chunk(sector, sector_size, block_size);
res = ctr_io_read_sector(crypto_io->lower_io, buffer, buffer_size, sector, result_count);
if (res)
return res;
//Part 1, deal with misaligned first block
size_t sectors_to_copy_prior = get_chunks_to_complete_relative_chunk_backwards(sector, sector_size, block_size);
if (sectors_to_copy_prior)
{
uint8_t buf[block_size];
res = get_misaligned_block(crypto_io, sector, sector_size, block_size, buf, block_function);
if (res)
return res;
//We now have the full block-- we now need to figure out which part of it to copy
uint64_t sector_pos = get_chunk_position(sector, sector_size);
uint64_t block_pos = get_chunk_position(current_block, block_size);
size_t amount_to_copy = block_size - (sector_pos - block_pos);
amount_to_copy = amount_to_copy < buffer_size ? amount_to_copy : buffer_size;
memcpy(buffer, buf + (sector_pos - block_pos), amount_to_copy);
current_processed += amount_to_copy;
current_block++;
}
//Part 2, Deal with all intermediate blocks
size_t bytes_left = result_size - (size_t)(current_processed - (uint8_t*)buffer);
size_t blocks = FLOOR(bytes_left, block_size);
if (blocks)
{
block_function(io, current_processed, current_block, blocks);
current_block += blocks;
current_processed += blocks * block_size;
bytes_left -= blocks * block_size;
}
//Part 3, deal with the final block
//FIXME what if we need to deal with a block that actually continues past the end of the disk? pad with zero?
if (bytes_left)
{
uint8_t buf[block_size];
//size_t current_sector = get_next_relative_block
size_t block_sector = get_prev_relative_chunk(current_block, block_size, sector_size);
res = get_misaligned_block(crypto_io, block_sector, sector_size, block_size, buf, block_function);
if (res)
return res;
//We now have the full block-- we now need to figure out which part of it to copy
uint64_t sector_pos = get_chunk_position(block_sector, sector_size);
uint64_t block_pos = get_chunk_position(current_block, block_size);
size_t amount_to_copy = block_size - (sector_pos - block_pos);
amount_to_copy = amount_to_copy < bytes_left ? amount_to_copy : bytes_left;
memcpy(current_processed, buf + (sector_pos - block_pos), amount_to_copy);
}
}
return res;
}
