/* Definitions to make GDB run on an Altos 3068 (m68k running SVR2)
- Copyright (C) 1987,1989 Free Software Foundation, Inc.
+ Copyright (C) 1987, 1989, 1991 Free Software Foundation, Inc.
This file is part of GDB.
#undef NAMES_HAVE_UNDERSCORE
-/* Exec files and symbol tables are in COFF format */
+/* COFF files don't have long filenames. */
-#define COFF_FORMAT
#define COFF_NO_LONG_FILE_NAMES
/* Address of end of stack space. */
#define STACK_END_ADDR (0x1000000)
/* Amount PC must be decremented by after a breakpoint.
- This is often the number of bytes in BREAKPOINT
- but not always.
On the Altos, the kernel resets the pc to the trap instr */
#define DECR_PC_AFTER_BREAK 0
-\f
-/* Things needed for making the inferior call functions. */
-
-/* Push an empty stack frame, to record the current PC, etc. */
-
-#define PUSH_DUMMY_FRAME \
-{ register CORE_ADDR sp = read_register (SP_REGNUM); \
- register int regnum; \
- char raw_buffer[12]; \
- sp = push_word (sp, read_register (PC_REGNUM)); \
- sp = push_word (sp, read_register (FP_REGNUM)); \
- write_register (FP_REGNUM, sp); \
- for (regnum = FP0_REGNUM + 7; regnum >= FP0_REGNUM; regnum--) \
- { read_register_bytes (REGISTER_BYTE (regnum), raw_buffer, 12); \
- sp = push_bytes (sp, raw_buffer, 12); } \
- for (regnum = FP_REGNUM - 1; regnum >= 0; regnum--) \
- sp = push_word (sp, read_register (regnum)); \
- sp = push_word (sp, read_register (PS_REGNUM)); \
- write_register (SP_REGNUM, sp); }
-
-/* Discard from the stack the innermost frame,
- restoring all saved registers. */
-
-#define POP_FRAME \
-{ register FRAME frame = get_current_frame (); \
- register CORE_ADDR fp; \
- register int regnum; \
- struct frame_saved_regs fsr; \
- struct frame_info *fi; \
- char raw_buffer[12]; \
- fi = get_frame_info (frame); \
- fp = fi->frame; \
- get_frame_saved_regs (fi, &fsr); \
- for (regnum = FP0_REGNUM + 7; regnum >= FP0_REGNUM; regnum--) \
- if (fsr.regs[regnum]) \
- { read_memory (fsr.regs[regnum], raw_buffer, 12); \
- write_register_bytes (REGISTER_BYTE (regnum), raw_buffer, 12); }\
- for (regnum = FP_REGNUM - 1; regnum >= 0; regnum--) \
- if (fsr.regs[regnum]) \
- write_register (regnum, read_memory_integer (fsr.regs[regnum], 4)); \
- if (fsr.regs[PS_REGNUM]) \
- write_register (PS_REGNUM, read_memory_integer (fsr.regs[PS_REGNUM], 4)); \
- write_register (FP_REGNUM, read_memory_integer (fp, 4)); \
- write_register (PC_REGNUM, read_memory_integer (fp + 4, 4)); \
- write_register (SP_REGNUM, fp + 8); \
- flush_cached_frames (); \
- set_current_frame (create_new_frame (read_register (FP_REGNUM), \
- read_pc ())); }
-
-\f
+/* The only reason this is here is the tm-altos.h reference below. It
+ was moved back here from tm-68k.h. FIXME? */
+
+#define SKIP_PROLOGUE(pc) \
+{ register int op = read_memory_integer (pc, 2); \
+ if (op == 0047126) \
+ pc += 4; /* Skip link #word */ \
+ else if (op == 0044016) \
+ pc += 6; /* Skip link #long */ \
+ /* Not sure why branches are here. */ \
+ /* From tm-isi.h, tm-altos.h */ \
+ else if (op == 0060000) \
+ pc += 4; /* Skip bra #word */ \
+ else if (op == 00600377) \
+ pc += 6; /* skip bra #long */ \
+ else if ((op & 0177400) == 0060000) \
+ pc += 2; /* skip bra #char */ \
+}
+
#include "tm-68k.h"