int
_dwarf_transform_arange_to_disk(Dwarf_P_Debug dbg, Dwarf_Error * error)
{
/* Total num of bytes in .debug_aranges section. */
Dwarf_Unsigned arange_num_bytes = 0;
/* Adjustment to align the start of the actual address ranges on a
boundary aligned with twice the address size. */
Dwarf_Small remainder = 0;
/* Total number of bytes excluding the length field. */
Dwarf_Unsigned adjusted_length = 0;
/* Points to first byte of .debug_aranges buffer. */
Dwarf_Small *arange = 0;
/* Fills in the .debug_aranges buffer. */
Dwarf_Small *arange_ptr = 0;
/* Scans the list of address ranges provided by user. */
Dwarf_P_Arange given_arange = 0;
/* Used to fill in 0. */
const Dwarf_Signed big_zero = 0;
int extension_word_size = dbg->de_64bit_extension ? 4 : 0;
int uword_size = dbg->de_offset_size;
int upointer_size = dbg->de_pointer_size;
int res = 0;
/* ***** BEGIN CODE ***** */
/* Size of the .debug_aranges section header. */
arange_num_bytes = extension_word_size +
uword_size + /* Size of length field. */
sizeof(Dwarf_Half) + /* Size of version field. */
uword_size + /* Size of .debug_info offset. */
sizeof(Dwarf_Small) + /* Size of address size field. */
sizeof(Dwarf_Small); /* Size of segment size field. */
/* Adjust the size so that the set of aranges begins on a boundary
that aligned with twice the address size. This is a Libdwarf
requirement. */
remainder = arange_num_bytes % (2 * upointer_size);
if (remainder != 0)
arange_num_bytes += (2 * upointer_size) - remainder;
/* Add the bytes for the actual address ranges. */
arange_num_bytes += upointer_size * 2 * (dbg->de_arange_count + 1);
GET_CHUNK(dbg, dbg->de_elf_sects[DEBUG_ARANGES],
arange, (unsigned long) arange_num_bytes, error);
arange_ptr = arange;
if (arange == NULL) {
_dwarf_p_error(dbg, error, DW_DLE_ALLOC_FAIL);
return (0);
}
if (extension_word_size) {
Dwarf_Word x = DISTINGUISHED_VALUE;
WRITE_UNALIGNED(dbg, (void *) arange_ptr,
(const void *) &x,
sizeof(x), extension_word_size);
arange_ptr += extension_word_size;
}
/* Write the total length of .debug_aranges section. */
adjusted_length = arange_num_bytes - uword_size
- extension_word_size;
{
Dwarf_Unsigned du = adjusted_length;
WRITE_UNALIGNED(dbg, (void *) arange_ptr,
(const void *) &du, sizeof(du), uword_size);
arange_ptr += uword_size;
}
/* Write the version as 2 bytes. */
{
Dwarf_Half verstamp = CURRENT_VERSION_STAMP;
WRITE_UNALIGNED(dbg, (void *) arange_ptr,
(const void *) &verstamp,
sizeof(verstamp), sizeof(Dwarf_Half));
arange_ptr += sizeof(Dwarf_Half);
}
/* Write the .debug_info offset. This is always 0. */
WRITE_UNALIGNED(dbg, (void *) arange_ptr,
(const void *) &big_zero,
sizeof(big_zero), uword_size);
arange_ptr += uword_size;
{
unsigned long count = dbg->de_arange_count + 1;
int res = 0;
if (dbg->de_reloc_pair) {
count = (3 * dbg->de_arange_count) + 1;
}
/* The following is a small optimization: not needed for
correctness */
res = _dwarf_pro_pre_alloc_n_reloc_slots(dbg,
DEBUG_ARANGES, count);
if (res != DW_DLV_OK) {
_dwarf_p_error(dbg, error, DW_DLE_ALLOC_FAIL);
return (0);
}
}
/* reloc for .debug_info */
res = dbg->de_reloc_name(dbg,
DEBUG_ARANGES,
extension_word_size +
uword_size + sizeof(Dwarf_Half),
dbg->de_sect_name_idx[DEBUG_INFO],
dwarf_drt_data_reloc, uword_size);
/* Write the size of addresses. */
*arange_ptr = dbg->de_pointer_size;
arange_ptr++;
/* Write the size of segment addresses. This is zero for MIPS
architectures. */
*arange_ptr = 0;
arange_ptr++;
/* Skip over the padding to align the start of the actual address
ranges to twice the address size. */
if (remainder != 0)
arange_ptr += (2 * upointer_size) - remainder;
/* The arange address, length are pointer-size fields of the target
machine. */
for (given_arange = dbg->de_arange; given_arange != NULL;
given_arange = given_arange->ag_next) {
/* Write relocation record for beginning of address range. */
res = dbg->de_reloc_name(dbg, DEBUG_ARANGES,
arange_ptr - arange, /* r_offset */
(long) given_arange->ag_symbol_index,
dwarf_drt_data_reloc, upointer_size);
if (res != DW_DLV_OK) {
_dwarf_p_error(dbg, error, DW_DLE_ALLOC_FAIL);
return (0);
}
/* Copy beginning address of range. */
WRITE_UNALIGNED(dbg, (void *) arange_ptr,
(const void *) &given_arange->ag_begin_address,
sizeof(given_arange->ag_begin_address),
upointer_size);
arange_ptr += upointer_size;
if (dbg->de_reloc_pair &&
given_arange->ag_end_symbol_index != 0 &&
given_arange->ag_length == 0) {
/* symbolic reloc, need reloc for length What if we really
know the length? If so, should use the other part of
'if'. */
Dwarf_Unsigned val;
res = dbg->de_reloc_pair(dbg, DEBUG_ARANGES,
arange_ptr - arange, /* r_offset */
given_arange->ag_symbol_index,
given_arange->ag_end_symbol_index,
dwarf_drt_first_of_length_pair,
upointer_size);
if (res != DW_DLV_OK) {
_dwarf_p_error(dbg, error, DW_DLE_ALLOC_FAIL);
return (0);
}
/* arange pre-calc so assem text can do .word end - begin
+ val (gets val from stream) */
val = given_arange->ag_end_symbol_offset -
given_arange->ag_begin_address;
WRITE_UNALIGNED(dbg, (void *) arange_ptr,
(const void *) &val,
sizeof(val), upointer_size);
arange_ptr += upointer_size;
} else {
/* plain old length to copy, no relocation at all */
WRITE_UNALIGNED(dbg, (void *) arange_ptr,
(const void *) &given_arange->ag_length,
sizeof(given_arange->ag_length),
upointer_size);
arange_ptr += upointer_size;
}
}
WRITE_UNALIGNED(dbg, (void *) arange_ptr,
(const void *) &big_zero,
sizeof(big_zero), upointer_size);
arange_ptr += upointer_size;
WRITE_UNALIGNED(dbg, (void *) arange_ptr,
(const void *) &big_zero,
sizeof(big_zero), upointer_size);
return (int) dbg->de_n_debug_sect;
}
/*
_dwarf_transform_simplename_to_disk writes
".rel.debug_pubnames",
".rel.debug_funcnames", sgi extension
".rel.debug_typenames", sgi extension
".rel.debug_varnames", sgi extension
".rel.debug_weaknames", sgi extension
to disk.
section_index indexes one of those sections.
entrykind is one of those 'kind's.
*/
int
_dwarf_transform_simplename_to_disk(Dwarf_P_Debug dbg, enum dwarf_sn_kind entrykind, int section_index, /* in
de_elf_sects
etc
*/
Dwarf_Error * error)
{
/* Used to fill in 0. */
const Dwarf_Signed big_zero = 0;
/* Used to scan the section data buffers. */
Dwarf_P_Section_Data debug_sect;
Dwarf_Signed debug_info_size;
Dwarf_P_Simple_nameentry nameentry_original;
Dwarf_P_Simple_nameentry nameentry;
Dwarf_Small *stream_bytes;
Dwarf_Small *cur_stream_bytes_ptr;
Dwarf_Unsigned stream_bytes_count;
Dwarf_Unsigned adjusted_length; /* count excluding length field
*/
int uword_size = dbg->de_offset_size;
int extension_size = dbg->de_64bit_extension ? 4 : 0;
Dwarf_P_Simple_name_header hdr;
/* ***** BEGIN CODE ***** */
debug_info_size = 0;
for (debug_sect = dbg->de_debug_sects; debug_sect != NULL;
debug_sect = debug_sect->ds_next) {
/* We want the size of the .debug_info section for this CU
because the dwarf spec requires us to output it below so we
look for it specifically. */
if (debug_sect->ds_elf_sect_no == dbg->de_elf_sects[DEBUG_INFO]) {
debug_info_size += debug_sect->ds_nbytes;
}
}
hdr = &dbg->de_simple_name_headers[entrykind];
/* Size of the .debug_typenames (or similar) section header. */
stream_bytes_count = extension_size + uword_size + /* Size of
length
field. */
sizeof(Dwarf_Half) + /* Size of version field. */
uword_size + /* Size of .debug_info offset. */
uword_size; /* Size of .debug_names. */
nameentry_original = hdr->sn_head;
nameentry = nameentry_original;
/* add in the content size */
stream_bytes_count += hdr->sn_net_len;
/* Size of the last 0 offset. */
stream_bytes_count += uword_size;
/* Now we know how long the entire section is */
GET_CHUNK(dbg, dbg->de_elf_sects[section_index],
stream_bytes, (unsigned long) stream_bytes_count, error);
if (stream_bytes == NULL) {
_dwarf_p_error(dbg, error, DW_DLE_ALLOC_FAIL);
return (0);
}
cur_stream_bytes_ptr = stream_bytes;
if (extension_size) {
Dwarf_Unsigned x = DISTINGUISHED_VALUE;
WRITE_UNALIGNED(dbg, cur_stream_bytes_ptr,
(const void *) &x, sizeof(x), extension_size);
cur_stream_bytes_ptr += extension_size;
}
/* Write the adjusted length of .debug_*names section. */
adjusted_length = stream_bytes_count - uword_size - extension_size;
WRITE_UNALIGNED(dbg, cur_stream_bytes_ptr,
(const void *) &adjusted_length,
sizeof(adjusted_length), uword_size);
cur_stream_bytes_ptr += uword_size;
/* Write the version as 2 bytes. */
{
Dwarf_Half verstamp = CURRENT_VERSION_STAMP;
WRITE_UNALIGNED(dbg, cur_stream_bytes_ptr,
(const void *) &verstamp,
sizeof(verstamp), sizeof(Dwarf_Half));
cur_stream_bytes_ptr += sizeof(Dwarf_Half);
}
/* Write the offset of the compile-unit. */
WRITE_UNALIGNED(dbg, cur_stream_bytes_ptr,
(const void *) &big_zero,
sizeof(big_zero), uword_size);
cur_stream_bytes_ptr += uword_size;
/* now create the relocation for the compile_unit offset */
{
int res = dbg->de_reloc_name(dbg,
section_index,
extension_size + uword_size +
sizeof(Dwarf_Half)
/* r_offset */
,
/* debug_info section name symbol */
dbg->de_sect_name_idx[DEBUG_INFO],
dwarf_drt_data_reloc,
uword_size);
if (res != DW_DLV_OK) {
{
_dwarf_p_error(dbg, error, DW_DLE_ALLOC_FAIL);
return (0);
}
}
}
/* Write the size of .debug_info section. */
WRITE_UNALIGNED(dbg, cur_stream_bytes_ptr,
(const void *) &debug_info_size,
sizeof(debug_info_size), uword_size);
cur_stream_bytes_ptr += uword_size;
for (nameentry = nameentry_original;
nameentry != NULL; nameentry = nameentry->sne_next) {
/* Copy offset of die from start of compile-unit. */
WRITE_UNALIGNED(dbg, cur_stream_bytes_ptr,
(const void *) &nameentry->sne_die->di_offset,
sizeof(nameentry->sne_die->di_offset),
uword_size);
cur_stream_bytes_ptr += uword_size;
/* Copy the type name. */
strcpy((char *) cur_stream_bytes_ptr, nameentry->sne_name);
cur_stream_bytes_ptr += nameentry->sne_name_len + 1;
}
WRITE_UNALIGNED(dbg, cur_stream_bytes_ptr,
(const void *) &big_zero,
sizeof(big_zero), uword_size);
return (int) dbg->de_n_debug_sect;
}
