DWARF_ADD_EXPR_ADDR(3) | Library Functions Manual | DWARF_ADD_EXPR_ADDR(3)

# NAME

`dwarf_add_expr_addr`, `dwarf_add_expr_addr_b` —
add a DW_OP_addr location expression

# LIBRARY

DWARF Access Library (libdwarf, -ldwarf)

# SYNOPSIS

`#include <libdwarf.h>`

Dwarf_Unsigned
`dwarf_add_expr_addr`(Dwarf_P_Expr expr, Dwarf_Unsigned address, Dwarf_Signed sym_index, Dwarf_Error *err);

Dwarf_Unsigned
`dwarf_add_expr_addr_b`(Dwarf_P_Expr expr, Dwarf_Unsigned address, Dwarf_Unsigned sym_index, Dwarf_Error *err);

# DESCRIPTION

Function `dwarf_add_expr_addr_b`() adds a `DW_OP_addr` location expression to the location expression descriptor referenced by argument expr.

Argument expr should reference a location expression descriptor allocated using the function dwarf_new_expr(3).

Argument address specifies the operand, a relocatable address value.

Argument sym_index specifies the ELF symbol index of the symbol to be used for relocation.

If argument err is not NULL, it will be used to store error information in case of an error.

Function `dwarf_add_expr_addr`() is deprecated. It is similar to function `dwarf_add_expr_addr_b`() except that it cannot handle all possible symbol index values.

# RETURN VALUES

On success, these functions return the size in bytes of the location expression byte stream generated. In case of an error, these functions return `DW_DLV_NOCOUNT` and set the argument err.

# ERRORS

These functions can fail with:

[`DW_DLE_ARGUMENT`]
  Argument expr was NULL.
[`DW_DLE_MEMORY`]
  An out of memory condition was encountered during the execution of the function.

# SEE ALSO

dwarf(3), dwarf_add_AT_location_expr(3), dwarf_add_expr_gen(3), dwarf_expr_current_offset(3), dwarf_expr_into_block(3), dwarf_new_expr(3)

September 9, 2011 | NetBSD 9.5