riscv
/
binutils-gdb
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity
Browse Source

* ns32k-tdep.c (ns32k_breakpoint_from_pc, ns32k_frame_chain, 

ns32k_frame_saved_pc, ns32k_frame_args_address,
ns32k_frame_locals_address, ns32k_frame_init_saved_regs,
ns32k_push_dummy_frame, ns32k_pop_frame): New functions.
* config/ns32k/tm-nbsd.h (FRAME_SAVED_PC): Remove.
* config/ns32k/tm-umax.h (INNER_THAN): Define as core_addr_lessthan.
(BREAKPOINT_FROM_PC): Define as ns32k_breakpoint_from_pc.
(BREAKPOINT): Remove..
(FRAME_CHAIN): Define as ns32k_frame_chain.
(FRAME_SAVED_PC): Define as ns32k_frame_saved_pc.
(FRAME_ARGS_ADDRESS): Define as ns32k_frame_args_address.
(FRAME_LOCALS_ADDRESS): Define as ns32k_frame_locals_address.
(FRAME_FIND_SAVED_REGS): Remove.
(FRAME_INIT_SAVED_REGS): Define as ns32k_frame_init_saved_regs.
(PUSH_DUMMY_FRAME): Define as ns32k_push_dummy_frame.
(POP_FRAME): Define as ns32k_pop_frame.
binutils-2_13-branch
Jason Thorpe 25 years ago
parent
f9419b056f
commit
78f9d7654a
4 changed files with 173 additions and 117 deletions
Whitespace
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
Split View
Diff Options
Show Stats Download Patch File Download Diff File
  1. 19
      gdb/ChangeLog
  2. 8
      gdb/config/ns32k/tm-nbsd.h
  3. 112
      gdb/config/ns32k/tm-umax.h
  4. 149
      gdb/ns32k-tdep.c

19
gdb/ChangeLog
View File

@ -1,3 +1,22 @@
2002-05-26 Jason Thorpe <thorpej@wasabisystems.com>
* ns32k-tdep.c (ns32k_breakpoint_from_pc, ns32k_frame_chain,
ns32k_frame_saved_pc, ns32k_frame_args_address,
ns32k_frame_locals_address, ns32k_frame_init_saved_regs,
ns32k_push_dummy_frame, ns32k_pop_frame): New functions.
* config/ns32k/tm-nbsd.h (FRAME_SAVED_PC): Remove.
* config/ns32k/tm-umax.h (INNER_THAN): Define as core_addr_lessthan.
(BREAKPOINT_FROM_PC): Define as ns32k_breakpoint_from_pc.
(BREAKPOINT): Remove..
(FRAME_CHAIN): Define as ns32k_frame_chain.
(FRAME_SAVED_PC): Define as ns32k_frame_saved_pc.
(FRAME_ARGS_ADDRESS): Define as ns32k_frame_args_address.
(FRAME_LOCALS_ADDRESS): Define as ns32k_frame_locals_address.
(FRAME_FIND_SAVED_REGS): Remove.
(FRAME_INIT_SAVED_REGS): Define as ns32k_frame_init_saved_regs.
(PUSH_DUMMY_FRAME): Define as ns32k_push_dummy_frame.
(POP_FRAME): Define as ns32k_pop_frame.
2002-05-26 Jason Thorpe <thorpej@wasabisystems.com>
* ns32k-tdep.c (ns32k_register_byte_32082,

8
gdb/config/ns32k/tm-nbsd.h
View File

@ -38,14 +38,6 @@
/* Offset to saved PC in sigcontext, from <machine/signal.h>. */
#define SIGCONTEXT_PC_OFFSET 20
#undef FRAME_SAVED_PC(FRAME)
#define FRAME_SAVED_PC(FRAME) \
(((FRAME)->signal_handler_caller \
? sigtramp_saved_pc (FRAME) \
: read_memory_integer ((FRAME)->frame + 4, 4)) \
)
/* tm-umax.h assumes a 32082 fpu. We have a 32382 fpu. */
#undef REGISTER_NAME

112
gdb/config/ns32k/tm-umax.h
View File

@ -52,11 +52,10 @@ extern CORE_ADDR umax_skip_prologue (CORE_ADDR);
/* Stack grows downward. */
#define INNER_THAN(lhs,rhs) ((lhs) < (rhs))
#define INNER_THAN(lhs,rhs) core_addr_lessthan ((lhs), (rhs))
/* Sequence of bytes for breakpoint instruction. */
#define BREAKPOINT {0xf2}
extern const unsigned char *ns32k_breakpoint_from_pc (CORE_ADDR *, int *);
#define BREAKPOINT_FROM_PC(PCP, LENP) ns32k_breakpoint_from_pc ((PCP), (LENP))
/* Amount PC must be decremented by after a breakpoint.
This is often the number of bytes in BREAKPOINT
@ -157,116 +156,41 @@ struct type *ns32k_register_virtual_type (int);
/* Describe the pointer in each stack frame to the previous stack frame
(its caller). */
/* FRAME_CHAIN takes a frame's nominal address
and produces the frame's chain-pointer. */
/* In the case of the ns32000 series, the frame's nominal address is the FP
value, and at that address is saved previous FP value as a 4-byte word. */
#define FRAME_CHAIN(thisframe) \
(!inside_entry_file ((thisframe)->pc) ? \
read_memory_integer ((thisframe)->frame, 4) :\
0)
/* Define other aspects of the stack frame. */
#define FRAME_SAVED_PC(FRAME) (read_memory_integer ((FRAME)->frame + 4, 4))
/* Compute base of arguments. */
#define FRAME_ARGS_ADDRESS(fi) \
((ns32k_get_enter_addr ((fi)->pc) > 1) ? \
((fi)->frame) : (read_register (SP_REGNUM) - 4))
CORE_ADDR ns32k_frame_chain (struct frame_info *);
#define FRAME_CHAIN(thisframe) ns32k_frame_chain ((thisframe))
#define FRAME_LOCALS_ADDRESS(fi) ((fi)->frame)
CORE_ADDR ns32k_frame_saved_pc (struct frame_info *);
#define FRAME_SAVED_PC(FRAME) ns32k_frame_saved_pc ((FRAME))
/* Get the address of the enter opcode for this function, if it is active.
Returns positive address > 1 if pc is between enter/exit,
1 if pc before enter or after exit, 0 otherwise. */
CORE_ADDR ns32k_frame_args_address (struct frame_info *);
#define FRAME_ARGS_ADDRESS(fi) ns32k_frame_args_address ((fi))
extern CORE_ADDR ns32k_get_enter_addr (CORE_ADDR);
CORE_ADDR ns32k_frame_locals_address (struct frame_info *);
#define FRAME_LOCALS_ADDRESS(fi) ns32k_frame_locals_address ((fi))
/* Return number of args passed to a frame.
Can return -1, meaning no way to tell. */
extern int umax_frame_num_args (struct frame_info *fi);
extern int umax_frame_num_args (struct frame_info *);
#define FRAME_NUM_ARGS(fi) (umax_frame_num_args ((fi)))
/* Return number of bytes at start of arglist that are not really args. */
#define FRAME_ARGS_SKIP 8
/* Put here the code to store, into a struct frame_saved_regs,
the addresses of the saved registers of frame described by FRAME_INFO.
This includes special registers such as pc and fp saved in special
ways in the stack frame. sp is even more special:
the address we return for it IS the sp for the next frame. */
void ns32k_frame_init_saved_regs (struct frame_info *);
#define FRAME_INIT_SAVED_REGS(FI) ns32k_frame_init_saved_regs ((FI))
extern int ns32k_localcount (CORE_ADDR enter_pc);
#define FRAME_FIND_SAVED_REGS(frame_info, frame_saved_regs) \
{ \
register int regmask, regnum; \
int localcount; \
register CORE_ADDR enter_addr; \
register CORE_ADDR next_addr; \
\
memset (&(frame_saved_regs), '\0', sizeof (frame_saved_regs)); \
enter_addr = ns32k_get_enter_addr ((frame_info)->pc); \
if (enter_addr > 1) \
{ \
regmask = read_memory_integer (enter_addr+1, 1) & 0xff; \
localcount = ns32k_localcount (enter_addr); \
next_addr = (frame_info)->frame + localcount; \
for (regnum = 0; regnum < 8; regnum++, regmask >>= 1) \
(frame_saved_regs).regs[regnum] = (regmask & 1) ? \
(next_addr -= 4) : 0; \
(frame_saved_regs).regs[SP_REGNUM] = (frame_info)->frame + 4;\
(frame_saved_regs).regs[PC_REGNUM] = (frame_info)->frame + 4;\
(frame_saved_regs).regs[FP_REGNUM] = \
(read_memory_integer ((frame_info)->frame, 4));\
} \
else if (enter_addr == 1) \
{ \
CORE_ADDR sp = read_register (SP_REGNUM); \
(frame_saved_regs).regs[PC_REGNUM] = sp; \
(frame_saved_regs).regs[SP_REGNUM] = sp + 4; \
} \
}
/* 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; \
sp = push_word (sp, read_register (PC_REGNUM)); \
sp = push_word (sp, read_register (FP_REGNUM)); \
write_register (FP_REGNUM, sp); \
for (regnum = 0; regnum < 8; regnum++) \
sp = push_word (sp, read_register (regnum)); \
write_register (SP_REGNUM, sp); \
}
extern void ns32k_push_dummy_frame (void);
#define PUSH_DUMMY_FRAME ns32k_push_dummy_frame ()
/* Discard from the stack the innermost frame, restoring all registers. */
#define POP_FRAME \
{ register struct frame_info *frame = get_current_frame (); \
register CORE_ADDR fp; \
register int regnum; \
struct frame_saved_regs fsr; \
struct frame_info *fi; \
fp = frame->frame; \
get_frame_saved_regs (frame, &fsr); \
for (regnum = 0; regnum < 8; regnum++) \
if (fsr.regs[regnum]) \
write_register (regnum, read_memory_integer (fsr.regs[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 (); \
}
extern void ns32k_pop_frame (void);
#define POP_FRAME ns32k_pop_frame ()
/* This sequence of words is the instructions
enter 0xff,0 82 ff 00

149
gdb/ns32k-tdep.c
View File

@ -24,6 +24,8 @@
#include "gdbcore.h"
static int sign_extend (int value, int bits);
static CORE_ADDR ns32k_get_enter_addr (CORE_ADDR);
static int ns32k_localcount (CORE_ADDR enter_pc);
char *
ns32k_register_name_32082 (int regno)
@ -136,6 +138,15 @@ umax_skip_prologue (CORE_ADDR pc)
}
return pc;
}
const unsigned char *
ns32k_breakpoint_from_pc (CORE_ADDR *pcp, int *lenp)
{
static const unsigned char breakpoint_insn[] = { 0xf2 };
*lenp = sizeof (breakpoint_insn);
return breakpoint_insn;
}
/* Return number of args passed to a frame.
Can return -1, meaning no way to tell.
@ -208,11 +219,11 @@ flip_bytes (void *p, int count)
}
}
/* Return the number of locals in the current frame given a pc
pointing to the enter instruction. This is used in the macro
FRAME_FIND_SAVED_REGS. */
/* Return the number of locals in the current frame given a
pc pointing to the enter instruction. This is used by
ns32k_frame_init_saved_regs. */
int
static int
ns32k_localcount (CORE_ADDR enter_pc)
{
unsigned char localtype;
@ -241,16 +252,10 @@ ns32k_about_to_return (CORE_ADDR pc)
return (read_memory_integer (pc, 1) == 0x12);
}
/*
* Get the address of the enter opcode for the function
* containing PC, if there is an enter for the function,
* and if the pc is between the enter and exit.
* Returns positive address if pc is between enter/exit,
* 1 if pc before enter or after exit, 0 otherwise.
*/
CORE_ADDR
/* Get the address of the enter opcode for this function, if it is active.
Returns positive address > 1 if pc is between enter/exit,
1 if pc before enter or after exit, 0 otherwise. */
static CORE_ADDR
ns32k_get_enter_addr (CORE_ADDR pc)
{
CORE_ADDR enter_addr;
@ -275,6 +280,122 @@ ns32k_get_enter_addr (CORE_ADDR pc)
return enter_addr; /* pc is between enter and exit */
}
CORE_ADDR
ns32k_frame_chain (struct frame_info *frame)
{
/* In the case of the NS32000 series, the frame's nominal address is the
FP value, and that address is saved at the previous FP value as a
4-byte word. */
if (inside_entry_file (frame->pc))
return 0;
return (read_memory_integer (frame->frame, 4));
}
CORE_ADDR
ns32k_frame_saved_pc (struct frame_info *frame)
{
if (frame->signal_handler_caller)
return (sigtramp_saved_pc (frame)); /* XXXJRT */
return (read_memory_integer (frame->frame + 4, 4));
}
CORE_ADDR
ns32k_frame_args_address (struct frame_info *frame)
{
if (ns32k_get_enter_addr (frame->pc) > 1)
return (frame->frame);
return (read_register (SP_REGNUM) - 4);
}
CORE_ADDR
ns32k_frame_locals_address (struct frame_info *frame)
{
return (frame->frame);
}
/* Code to initialize the addresses of the saved registers of frame described
by FRAME_INFO. This includes special registers such as pc and fp saved in
special ways in the stack frame. sp is even more special: the address we
return for it IS the sp for the next frame. */
void
ns32k_frame_init_saved_regs (struct frame_info *frame)
{
int regmask, regnum;
int localcount;
CORE_ADDR enter_addr, next_addr;
if (frame->saved_regs)
return;
frame_saved_regs_zalloc (frame);
enter_addr = ns32k_get_enter_addr (frame->pc);
if (enter_addr > 1)
{
regmask = read_memory_integer (enter_addr + 1, 1) & 0xff;
localcount = ns32k_localcount (enter_addr);
next_addr = frame->frame + localcount;
for (regnum = 0; regnum < 8; regnum++)
{
if (regmask & (1 << regnum))
frame->saved_regs[regnum] = next_addr -= 4;
}
frame->saved_regs[SP_REGNUM] = frame->frame + 4;
frame->saved_regs[PC_REGNUM] = frame->frame + 4;
frame->saved_regs[FP_REGNUM] = read_memory_integer (frame->frame, 4);
}
else if (enter_addr == 1)
{
CORE_ADDR sp = read_register (SP_REGNUM);
frame->saved_regs[PC_REGNUM] = sp;
frame->saved_regs[SP_REGNUM] = sp + 4;
}
}
void
ns32k_push_dummy_frame (void)
{
CORE_ADDR sp = read_register (SP_REGNUM);
int regnum;
sp = push_word (sp, read_register (PC_REGNUM));
sp = push_word (sp, read_register (FP_REGNUM));
write_register (FP_REGNUM, sp);
for (regnum = 0; regnum < 8; regnum++)
sp = push_word (sp, read_register (regnum));
write_register (SP_REGNUM, sp);
}
void
ns32k_pop_frame (void)
{
struct frame_info *frame = get_current_frame ();
CORE_ADDR fp;
int regnum;
fp = frame->frame;
FRAME_INIT_SAVED_REGS (frame);
for (regnum = 0; regnum < 8; regnum++)
if (frame->saved_regs[regnum])
write_register (regnum,
read_memory_integer (frame->saved_regs[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 ();
}
void
_initialize_ns32k_tdep (void)
{

Write Preview
Loading…
Cancel
Save