DWARF_ADD_EXPR_GEN(3) | Library Functions Manual | DWARF_ADD_EXPR_GEN(3) |
dwarf_add_expr_gen
—
#include <libdwarf.h>
Dwarf_Unsigned
dwarf_add_expr_gen
(Dwarf_P_Expr
expr, Dwarf_Small opcode,
Dwarf_Unsigned val1, Dwarf_Unsigned
val2, Dwarf_Error *err);
dwarf_add_expr_gen
() adds a location expression
operator 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 opcode specifies the operation code
of the location expression operator. Valid values for this argument are
those denoted by the DW_OP_
* constants defined in
<libdwarf.h>
.
To generate a DW_OP_addr
operation,
application code should instead use
dwarf_add_expr_addr_b(3).
Argument val1 specifies the first operand of the location expression operator.
Argument val2 specifies the second operand of the location expression operator.
If argument err is not NULL, it will be used to store error information in case of an error.
dwarf_add_expr_gen
() returns the
size in bytes of the location expression byte stream generated. In case of an
error, function dwarf_add_expr_gen
() returns
DW_DLV_NOCOUNT
and sets the argument
err.
dwarf_add_expr_gen
() can fail with:
DW_DLE_ARGUMENT
]DW_DLE_LOC_EXPR_BAD
]DW_DLE_MEMORY
]September 9, 2011 | NetBSD 9.2 |