diff options
Diffstat (limited to 'gdb/i386ly-tdep.c')
| -rw-r--r-- | gdb/i386ly-tdep.c | 61 |
1 files changed, 48 insertions, 13 deletions
diff --git a/gdb/i386ly-tdep.c b/gdb/i386ly-tdep.c index 92b544d..69c3750 100644 --- a/gdb/i386ly-tdep.c +++ b/gdb/i386ly-tdep.c @@ -1,5 +1,5 @@ /* Target-dependent code for Intel 386 running LynxOS. - Copyright 1993, 1996, 2000, 2001 Free Software Foundation, Inc. + Copyright 1993, 1996, 2000, 2001, 2002 Free Software Foundation, Inc. This file is part of GDB. @@ -19,27 +19,62 @@ Boston, MA 02111-1307, USA. */ #include "defs.h" -#include "inferior.h" -#include "target.h" #include "gdbcore.h" +#include "inferior.h" #include "regcache.h" +#include "target.h" + +#include "i386-tdep.h" -/* Return the PC of the caller from the call frame. Assumes the subr prologue - has already been executed, and the frame pointer setup. If this is the - outermost frame, we check to see if we are in a system call by examining the - previous instruction. If so, then the return PC is actually at SP+4 because - system calls use a different calling sequence. */ +/* Return the PC of the caller from the call frame. Assumes the subr + prologue has already been executed, and the frame pointer setup. + If this is the outermost frame, we check to see if we are in a + system call by examining the previous instruction. If so, then the + return PC is actually at SP+4 because system calls use a different + calling sequence. */ -CORE_ADDR +static CORE_ADDR i386lynx_saved_pc_after_call (struct frame_info *frame) { char opcode[7]; static const unsigned char call_inst[] = - {0x9a, 0, 0, 0, 0, 8, 0}; /* lcall 0x8,0x0 */ + { 0x9a, 0, 0, 0, 0, 8, 0 }; /* lcall 0x8,0x0 */ - read_memory (frame->pc - 7, opcode, 7); + read_memory_nobpt (frame->pc - 7, opcode, 7); if (memcmp (opcode, call_inst, 7) == 0) - return read_memory_integer (read_register (SP_REGNUM) + 4, 4); + return read_memory_unsigned_integer (read_register (SP_REGNUM) + 4, 4); + + return read_memory_unsigned_integer (read_register (SP_REGNUM), 4); +} + + +/* LynxOS. */ +static void +i386lynx_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) +{ + set_gdbarch_saved_pc_after_call (gdbarch, i386lynx_saved_pc_after_call); +} + + +static enum gdb_osabi +i386lynx_coff_osabi_sniffer (bfd *abfd) +{ + if (strcmp (bfd_get_target (abfd), "coff-i386-lynx") == 0) + return GDB_OSABI_LYNXOS; + + return GDB_OSABI_UNKNOWN; +} + + +/* Provide a prototype to silence -Wmissing-prototypes. */ +void _initialize_i386lynx_tdep (void); + +void +_initialize_i386bsd_tdep (void) +{ + gdbarch_register_osabi_sniffer (bfd_arch_i386, bfd_target_coff_flavour, + i386lynx_coff_osabi_sniffer); - return read_memory_integer (read_register (SP_REGNUM), 4); + gdbarch_register_osabi (bfd_arch_i386, GDB_OSABI_LYNXOS, + i386lynx_init_abi); } |