diff options
Diffstat (limited to 'gdb/avr-tdep.c')
| -rw-r--r-- | gdb/avr-tdep.c | 40 |
1 files changed, 39 insertions, 1 deletions
diff --git a/gdb/avr-tdep.c b/gdb/avr-tdep.c index 3db8530..d3ecf2b 100644 --- a/gdb/avr-tdep.c +++ b/gdb/avr-tdep.c @@ -827,6 +827,44 @@ avr_extract_return_value (struct type *type, struct regcache *regcache, } } +/* Determine, for architecture GDBARCH, how a return value of TYPE + should be returned. If it is supposed to be returned in registers, + and READBUF is non-zero, read the appropriate value from REGCACHE, + and copy it into READBUF. If WRITEBUF is non-zero, write the value + from WRITEBUF into REGCACHE. */ + +enum return_value_convention +avr_return_value (struct gdbarch *gdbarch, struct type *valtype, + struct regcache *regcache, gdb_byte *readbuf, + const gdb_byte *writebuf) +{ + int struct_return = ((TYPE_CODE (valtype) == TYPE_CODE_STRUCT + || TYPE_CODE (valtype) == TYPE_CODE_UNION + || TYPE_CODE (valtype) == TYPE_CODE_ARRAY) + && !(TYPE_LENGTH (valtype) == 1 + || TYPE_LENGTH (valtype) == 2 + || TYPE_LENGTH (valtype) == 4 + || TYPE_LENGTH (valtype) == 8)); + + if (writebuf != NULL) + { + gdb_assert (!struct_return); + error (_("Cannot store return value.")); + } + + if (readbuf != NULL) + { + gdb_assert (!struct_return); + avr_extract_return_value (valtype, regcache, readbuf); + } + + if (struct_return) + return RETURN_VALUE_STRUCT_CONVENTION; + else + return RETURN_VALUE_REGISTER_CONVENTION; +} + + /* Put here the code to store, into fi->saved_regs, the addresses of the saved registers of frame described by FRAME_INFO. This includes special registers such as pc and fp saved in special ways @@ -1271,7 +1309,7 @@ avr_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) set_gdbarch_register_name (gdbarch, avr_register_name); set_gdbarch_register_type (gdbarch, avr_register_type); - set_gdbarch_extract_return_value (gdbarch, avr_extract_return_value); + set_gdbarch_return_value (gdbarch, avr_return_value); set_gdbarch_print_insn (gdbarch, print_insn_avr); set_gdbarch_push_dummy_call (gdbarch, avr_push_dummy_call); |