NAME
dwarf_get_fde_info_for_all_regs —
retrieve register rule row
LIBRARY
DWARF Access Library (libdwarf, -ldwarf)
SYNOPSIS
#include <libdwarf.h>
int
dwarf_get_fde_info_for_all_regs(
Dwarf_Fde
fde,
Dwarf_Addr pc,
Dwarf_Regtable
*reg_table,
Dwarf_Addr *row_pc,
Dwarf_Error *err);
DESCRIPTION
Function
dwarf_get_fde_info_for_all_regs() retrieves a row
from the register rule table associated with the given FDE descriptor.
Argument
fde should reference a valid DWARF FDE
descriptor.
Argument
pc should hold the program counter address to be
used to locate the desired table row.
Argument
reg_table should point to a
Dwarf_Regtable descriptor which will hold the returned
table row of register rules.
Argument
row_pc should point to a location which will be
set to the lowest program counter address associated with the table row.
If argument
err is not NULL, it will be used to store
error information in case of an error.
The
Dwarf_Regtable descriptor is defined in the header
file
<libdwarf.h>:
typedef struct {
struct {
Dwarf_Small dw_offset_relevant;
Dwarf_Half dw_regnum;
Dwarf_Addr dw_offset;
} rules[DW_REG_TABLE_SIZE];
} Dwarf_Regtable;
For each of the register rules returned, the
dw_offset_relevant field is set to 1 if the register
rule has a offset value. The
dw_regnum field is set to
the register number associated with the regsiter rule. The
dw_offset field is set to the offset value associated
with the register rule.
The number of register columns returned is either the constant value
DW_REG_TABLE_SIZE as defined
in the header file
<libdwarf.h>, or the value set by
function
dwarf_set_frame_rule_table_size(3),
whichever is smaller.
COMPATIBILITY
Function
dwarf_get_fde_info_for_all_regs() is deprecated since
it only supports DWARF2 frame sections. Applications should instead use
function
dwarf_get_fde_info_for_all_regs3(3)
which supports both DWARF2 and DWARF3 frame sections.
RETURN VALUES
Function
dwarf_get_fde_info_for_all_regs() returns
DW_DLV_OK
when it succeeds. In case of an error, it
returns
DW_DLV_ERROR
and sets the argument
err.
ERRORS
Function
dwarf_get_fde_info_for_all_regs() can fail with:
-
-
- [
DW_DLE_ARGUMENT
]
- One of the arguments fde,
reg_table or row_pc was
NULL.
-
-
- [
DW_DLE_PC_NOT_IN_FDE_RANGE
]
- The program counter value provided in argument
pc did not fall in the range covered by argument
fde.
SEE ALSO
dwarf(3),
dwarf_get_fde_at_pc(3),
dwarf_get_fde_info_for_all_regs3(3),
dwarf_get_fde_info_for_cfa_reg3(3),
dwarf_get_fde_info_for_reg(3),
dwarf_get_fde_info_for_reg3(3),
dwarf_get_fde_n(3),
dwarf_set_frame_cfa_value(3),
dwarf_set_frame_rule_table_size(3),
dwarf_set_frame_rule_initial_value(3),
dwarf_set_frame_same_value(3),
dwarf_set_frame_undefined_value(3)