diff options
Diffstat (limited to 'contrib/gdb/gdb/i386-tdep.c')
| -rw-r--r-- | contrib/gdb/gdb/i386-tdep.c | 114 |
1 files changed, 110 insertions, 4 deletions
diff --git a/contrib/gdb/gdb/i386-tdep.c b/contrib/gdb/gdb/i386-tdep.c index 47be4b3..1daa81d 100644 --- a/contrib/gdb/gdb/i386-tdep.c +++ b/contrib/gdb/gdb/i386-tdep.c @@ -1,5 +1,6 @@ /* Intel 386 target-dependent stuff. - Copyright (C) 1988, 1989, 1991, 1994, 1995, 1996 Free Software Foundation, Inc. + Copyright (C) 1988, 1989, 1991, 1994, 1995, 1996, 1998 + Free Software Foundation, Inc. This file is part of GDB. @@ -25,6 +26,8 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #include "target.h" #include "floatformat.h" #include "symtab.h" +#include "gdbcmd.h" +#include "command.h" static long i386_get_frame_setup PARAMS ((CORE_ADDR)); @@ -36,6 +39,23 @@ static void codestream_seek PARAMS ((CORE_ADDR)); static unsigned char codestream_fill PARAMS ((int)); +CORE_ADDR skip_trampoline_code PARAMS ((CORE_ADDR, char *)); + +static int gdb_print_insn_i386 (bfd_vma, disassemble_info *); + +void _initialize_i386_tdep PARAMS ((void)); + +/* This is the variable the is set with "set disassembly-flavor", + and its legitimate values. */ +static char att_flavor[] = "att"; +static char intel_flavor[] = "intel"; +static char *valid_flavors[] = { + att_flavor, + intel_flavor, + NULL +}; +static char *disassembly_flavor = att_flavor; + /* Stdio style buffering was used to minimize calls to ptrace, but this buffering did not take into account that the code section being accessed may not be an even number of buffers long (even if the buffer is only @@ -209,6 +229,39 @@ i386_get_frame_setup (pc) op = codestream_get (); /* update next opcode */ } + if (op == 0x68 || op == 0x6a) + { + /* + * this function may start with + * + * pushl constant + * call _probe + * addl $4, %esp + * followed by + * pushl %ebp + * etc. + */ + int pos; + unsigned char buf[8]; + + /* Skip past the pushl instruction; it has either a one-byte + or a four-byte operand, depending on the opcode. */ + pos = codestream_tell (); + if (op == 0x68) + pos += 4; + else + pos += 1; + codestream_seek (pos); + + /* Read the following 8 bytes, which should be "call _probe" (6 bytes) + followed by "addl $4,%esp" (2 bytes). */ + codestream_read (buf, sizeof (buf)); + if (buf[0] == 0xe8 && buf[6] == 0xc4 && buf[7] == 0x4) + pos += sizeof (buf); + codestream_seek (pos); + op = codestream_get (); /* update next opcode */ + } + if (op == 0x55) /* pushl %ebp */ { /* check for movl %esp, %ebp - can be written two ways */ @@ -390,10 +443,11 @@ i386_frame_find_saved_regs (fip, fsrp) struct frame_info *fip; struct frame_saved_regs *fsrp; { - long locals; + long locals = -1; unsigned char op; CORE_ADDR dummy_bottom; CORE_ADDR adr; + CORE_ADDR pc; int i; memset (fsrp, 0, sizeof *fsrp); @@ -416,7 +470,9 @@ i386_frame_find_saved_regs (fip, fsrp) return; } - locals = i386_get_frame_setup (get_pc_function_start (fip->pc)); + pc = get_pc_function_start (fip->pc); + if (pc != 0) + locals = i386_get_frame_setup (pc); if (locals >= 0) { @@ -655,6 +711,32 @@ i386v4_sigtramp_saved_pc (frame) } #endif /* I386V4_SIGTRAMP_SAVED_PC */ +#ifdef STATIC_TRANSFORM_NAME +/* SunPRO encodes the static variables. This is not related to C++ mangling, + it is done for C too. */ + +char * +sunpro_static_transform_name (name) + char *name; +{ + char *p; + if (IS_STATIC_TRANSFORM_NAME (name)) + { + /* For file-local statics there will be a period, a bunch + of junk (the contents of which match a string given in the + N_OPT), a period and the name. For function-local statics + there will be a bunch of junk (which seems to change the + second character from 'A' to 'B'), a period, the name of the + function, and the name. So just skip everything before the + last period. */ + p = strrchr (name, '.'); + if (p != NULL) + name = p + 1; + } + return name; +} +#endif /* STATIC_TRANSFORM_NAME */ + /* Stuff for WIN32 PE style DLL's but is pretty generic really. */ @@ -681,8 +763,32 @@ skip_trampoline_code (pc, name) return 0; /* not a trampoline */ } +static int +gdb_print_insn_i386 (memaddr, info) + bfd_vma memaddr; + disassemble_info * info; +{ + if (disassembly_flavor == att_flavor) + return print_insn_i386_att (memaddr, info); + else if (disassembly_flavor == intel_flavor) + return print_insn_i386_intel (memaddr, info); +} + void _initialize_i386_tdep () { - tm_print_insn = print_insn_i386; + tm_print_insn = gdb_print_insn_i386; + tm_print_insn_info.mach = bfd_lookup_arch (bfd_arch_i386, 0)->mach; + + /* Add the variable that controls the disassembly flavor */ + add_show_from_set( + add_set_enum_cmd ("disassembly-flavor", no_class, + valid_flavors, + (char *) &disassembly_flavor, + "Set the disassembly flavor, the valid values are \"att\" and \"intel\", \ +and the default value is \"att\".", + &setlist), + &showlist); + + } |
