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Diffstat (limited to 'gdb/tramp-frame.h')
-rw-r--r-- | gdb/tramp-frame.h | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/gdb/tramp-frame.h b/gdb/tramp-frame.h new file mode 100644 index 0000000..44e266e --- /dev/null +++ b/gdb/tramp-frame.h @@ -0,0 +1,64 @@ +/* Signal trampoline unwinder, for GDB the GNU Debugger. + + Copyright 2004 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 TRAMP_FRAME_H +#define TRAMP_FRAME_H + +struct trad_frame; +struct frame_info; +struct trad_frame_cache; + +/* A trampoline consists of a small sequence of instructions placed at + an unspecified location in the inferior's address space. The only + identifying attribute of the trampoline's address is that it does + not fall inside an object file's section. + + The only way to identify a trampoline is to perform a brute force + examination of the instructions at and around the PC. + + This module provides a convent interface for performing that + operation. */ + +/* A trampoline descriptor. */ + +struct tramp_frame +{ + /* The trampoline's entire instruction sequence. Search for this in + the inferior at or around the frame's PC. It is assumed that the + PC is INSN_SIZE aligned, and that each element of TRAMP contains + one INSN_SIZE instruction. It is also assumed that TRAMP[0] + contains the first instruction of the trampoline and hence the + address of the instruction matching TRAMP[0] is the trampoline's + "func" address. */ + int insn_size; + ULONGEST insn[8]; + /* Initialize a trad-frame cache corresponding to the tramp-frame. + FUNC is the address of the instruction TRAMP[0] in memory. */ + void (*init) (const struct tramp_frame *self, + struct frame_info *next_frame, + struct trad_frame_cache *this_cache, + CORE_ADDR func); +}; + +void tramp_frame_append (struct gdbarch *gdbarch, + const struct tramp_frame *tramp); + +#endif |