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* m68k-tdep.c (sun3_saved_pc_after_call): Only do trap check for

Browse source 
Suns.  Rename to m68k_saved_pc_after_call.
* tm-68k-noun.h, tm-sun3.h (SAVED_PC_AFTER_CALL):  Use
m68k_saved... instead of sun3_saved...
This commit is contained in:
Stu Grossman 1992-09-17 05:01:51 +00:00
parent 569dac152d
commit f499253491
4 changed files with 79 additions and 16 deletions
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7
gdb/ChangeLog
View file

@ -1,3 +1,10 @@
Wed Sep 16 21:57:14 1992 Stu Grossman (grossman at cygnus.com)
* m68k-tdep.c (sun3_saved_pc_after_call): Only do trap check for
Suns. Rename to m68k_saved_pc_after_call.
* tm-68k-noun.h, tm-sun3.h (SAVED_PC_AFTER_CALL): Use
m68k_saved... instead of sun3_saved...
Mon Sep 14 19:20:43 1992 Stu Grossman (grossman at cygnus.com)
* energize.c (pty_to_kernel): Must check for EAGAIN as

80
gdb/m68k-tdep.c
View file

@ -1,5 +1,5 @@
/* Target dependent code for the Motorola 68000 series.
Copyright (C) 1990 Free Software Foundation, Inc.
Copyright (C) 1990, 1992 Free Software Foundation, Inc.
This file is part of GDB.
@ -19,7 +19,6 @@ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
#include "defs.h"
#include "ieee-float.h"
#include "param.h"
#include "frame.h"
#include "symtab.h"
@ -149,6 +148,7 @@ m68k_pop_frame ()
#define P_LEA_L 0x43fb
#define P_MOVM_L 0x48ef
#define P_FMOVM 0xf237
#define P_TRAP 0x4e40
CORE_ADDR
m68k_skip_prologue (ip)
@ -236,12 +236,12 @@ void
supply_gregset (gregsetp)
gregset_t *gregsetp;
{
register int regno;
register int regi;
register greg_t *regp = (greg_t *) gregsetp;
for (regno = 0 ; regno < R_PC ; regno++)
for (regi = 0 ; regi < R_PC ; regi++)
{
supply_register (regno, (char *) (regp + regno));
supply_register (regi, (char *) (regp + regi));
}
supply_register (PS_REGNUM, (char *) (regp + R_PS));
supply_register (PC_REGNUM, (char *) (regp + R_PC));
@ -252,7 +252,7 @@ fill_gregset (gregsetp, regno)
gregset_t *gregsetp;
int regno;
{
int regi;
register int regi;
register greg_t *regp = (greg_t *) gregsetp;
extern char registers[];
@ -260,7 +260,7 @@ int regno;
{
if ((regno == -1) || (regno == regi))
{
*(regp + regno) = *(int *) &registers[REGISTER_BYTE (regi)];
*(regp + regi) = *(int *) &registers[REGISTER_BYTE (regi)];
}
}
if ((regno == -1) || (regno == PS_REGNUM))
@ -283,11 +283,13 @@ void
supply_fpregset (fpregsetp)
fpregset_t *fpregsetp;
{
register int regno;
register int regi;
char *from;
for (regno = FP0_REGNUM ; regno < FPC_REGNUM ; regno++)
for (regi = FP0_REGNUM ; regi < FPC_REGNUM ; regi++)
{
supply_register (regno, (char *) &(fpregsetp -> f_fpregs[regno][0]));
from = (char *) &(fpregsetp -> f_fpregs[regi-FP0_REGNUM][0]);
supply_register (regi, from);
}
supply_register (FPC_REGNUM, (char *) &(fpregsetp -> f_pcr));
supply_register (FPS_REGNUM, (char *) &(fpregsetp -> f_psr));
@ -314,8 +316,8 @@ int regno;
if ((regno == -1) || (regno == regi))
{
from = (char *) &registers[REGISTER_BYTE (regi)];
to = (char *) &(fpregsetp -> f_fpregs[regi][0]);
bcopy (from, to, REGISTER_RAW_SIZE (regno));
to = (char *) &(fpregsetp -> f_fpregs[regi-FP0_REGNUM][0]);
bcopy (from, to, REGISTER_RAW_SIZE (regi));
}
}
if ((regno == -1) || (regno == FPC_REGNUM))
@ -335,3 +337,57 @@ int regno;
#endif /* defined (FP0_REGNUM) */
#endif /* USE_PROC_FS */
#ifdef GET_LONGJMP_TARGET
/* Figure out where the longjmp will land. Slurp the args out of the stack.
We expect the first arg to be a pointer to the jmp_buf structure from which
we extract the pc (JB_PC) that we will land at. The pc is copied into PC.
This routine returns true on success. */
int
get_longjmp_target(pc)
CORE_ADDR *pc;
{
CORE_ADDR sp, jb_addr;
sp = read_register(SP_REGNUM);
if (target_read_memory(sp + SP_ARG0, /* Offset of first arg on stack */
&jb_addr,
sizeof(CORE_ADDR)))
return 0;
SWAP_TARGET_AND_HOST(&jb_addr, sizeof(CORE_ADDR));
if (target_read_memory(jb_addr + JB_PC * JB_ELEMENT_SIZE, pc,
sizeof(CORE_ADDR)))
return 0;
SWAP_TARGET_AND_HOST(pc, sizeof(CORE_ADDR));
return 1;
}
#endif /* GET_LONGJMP_TARGET */
/* Immediately after a function call, return the saved pc before the frame
is setup. We check for the common case of being inside of a system call,
and if so, we know that Sun pushes the call # on the stack prior to doing
the trap. */
CORE_ADDR
m68k_saved_pc_after_call(frame)
struct frame_info *frame;
{
#ifdef sun
int op;
op = read_memory_integer (frame->pc, 2);
op &= 0xFFFF;
if (op == P_TRAP)
return read_memory_integer (read_register (SP_REGNUM) + 4, 4);
else
#endif /* sun */
return read_memory_integer (read_register (SP_REGNUM), 4);
}

4
gdb/tm-68k-noun.h
View file

@ -60,8 +60,8 @@ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
struct frame_info;
#endif
extern CORE_ADDR sun3_saved_pc_after_call PARAMS ((struct frame_info *));
extern CORE_ADDR m68k_saved_pc_after_call PARAMS ((struct frame_info *));
#undef SAVED_PC_AFTER_CALL
#define SAVED_PC_AFTER_CALL(frame) \
sun3_saved_pc_after_call(frame)
m68k_saved_pc_after_call(frame)

4
gdb/tm-sun3.h
View file

@ -61,7 +61,7 @@ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
struct frame_info;
#endif
extern CORE_ADDR sun3_saved_pc_after_call PARAMS ((struct frame_info *));
extern CORE_ADDR m68k_saved_pc_after_call PARAMS ((struct frame_info *));
#define SAVED_PC_AFTER_CALL(frame) \
sun3_saved_pc_after_call(frame)
m68k_saved_pc_after_call(frame)