/* Traditional frame unwind support, for GDB the GNU Debugger. Copyright 2003 Free Software Foundation, Inc. This file is part of GDB. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #ifndef TRAD_FRAME_H #define TRAD_FRAME_H struct frame_info; /* A traditional saved regs table, indexed by REGNUM, encoding where the value of REGNUM for the previous frame can be found in this frame. The table is initialized with an identity encoding (ADDR == -1, REALREG == REGNUM) indicating that the value of REGNUM in the previous frame can be found in register REGNUM (== REALREG) in this frame. The initial encoding can then be changed: Modify ADDR (REALREG >= 0, ADDR != -1) to indicate that the value of register REGNUM in the previous frame can be found in memory at ADDR in this frame (addr_p, !realreg_p, !value_p). Modify REALREG (REALREG >= 0, ADDR == -1) to indicate that the value of register REGNUM in the previous frame is found in register REALREG in this frame (!addr_p, realreg_p, !value_p). Call trad_frame_set_value (REALREG == -1) to indicate that the value of register REGNUM in the previous frame is found in ADDR (!addr_p, !realreg_p, value_p). Call trad_frame_set_unknown (REALREG == -2) to indicate that the register's value is not known. */ struct trad_frame_saved_reg { LONGEST addr; /* A CORE_ADDR fits in a longest. */ int realreg; }; /* Encode REGNUM value in the trad-frame. */ void trad_frame_set_value (struct trad_frame_saved_reg this_saved_regs[], int regnum, LONGEST val); /* Mark REGNUM as unknown. */ void trad_frame_set_unknown (struct trad_frame_saved_reg this_saved_regs[], int regnum); /* Convenience functions, return non-zero if the register has been encoded as specified. */ int trad_frame_value_p (struct trad_frame_saved_reg this_saved_regs[], int regnum); int trad_frame_addr_p (struct trad_frame_saved_reg this_saved_regs[], int regnum); int trad_frame_realreg_p (struct trad_frame_saved_reg this_saved_regs[], int regnum); /* Return a freshly allocated (and initialized) trad_frame array. */ struct trad_frame_saved_reg *trad_frame_alloc_saved_regs (struct frame_info *next_frame); /* Given the trad_frame info, return the location of the specified register. */ void trad_frame_prev_register (struct frame_info *next_frame, struct trad_frame_saved_reg this_saved_regs[], int regnum, int *optimizedp, enum lval_type *lvalp, CORE_ADDR *addrp, int *realregp, void *bufferp); #endif