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binutils-gdb
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* am29k-tdep.c (TAGWORD_ZERO_MASK): New #define. 

(examine_tag):  Use it.
(read_register_stack):  Only look in the local registers for a
memory address if it's between rfb and rsp; go to memory otherwise.
This commit is contained in:
John Gilmore 1993-03-06 02:02:39 +00:00
parent 19327ea5d4
commit 946f014bf8
2 changed files with 21 additions and 8 deletions
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7
gdb/ChangeLog
View File

@ -1,7 +1,10 @@
Fri Mar 5 17:39:45 1993 John Gilmore (gnu@cacophony.cygnus.com)
* am29k-tdep.c (initialize_29k): Fix call_scratch_address doc.
Remove reginv command.
* am29k-tdep.c (TAGWORD_ZERO_MASK): New #define.
(examine_tag): Use it.
(read_register_stack): Only look in the local registers for a
memory address if it's between rfb and rsp; go to memory otherwise.
(initialize_29k): Fix call_scratch_address doc. Remove reginv_com.
(reginv_com): Remove ancient kludge command.
Fri Mar 5 17:16:26 1993 K. Richard Pixley (rich@rtl.cygnus.com)

22
gdb/am29k-tdep.c
View File

@ -22,11 +22,16 @@ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
#include "gdbcore.h"
#include "frame.h"
#include "value.h"
/*#include <sys/param.h> */
#include "symtab.h"
#include "inferior.h"
#include "gdbcmd.h"
/* If all these bits in an instruction word are zero, it is a "tag word"
which precedes a function entry point and gives stack traceback info.
This used to be defined as 0xff000000, but that treated 0x00000deb as
a tag word, while it is really used as a breakpoint. */
#define TAGWORD_ZERO_MASK 0xff00f800
extern CORE_ADDR text_start; /* FIXME, kludge... */
/* The user-settable top of the register stack in virtual memory. We
@ -329,7 +334,7 @@ examine_tag(p, is_trans, argcount, msize, mfp_used)
unsigned int tag1, tag2;
tag1 = read_memory_integer (p, 4);
if ((tag1 & 0xff000000) != 0) /* Not a tag word */
if ((tag1 & TAGWORD_ZERO_MASK) != 0) /* Not a tag word */
return 0;
if (tag1 & (1<<23)) /* A two word tag */
{
@ -400,7 +405,7 @@ init_frame_info (innermost_frame, fci)
do not trace back beyond the start of the text segment
(just as a sanity check to avoid going into never-never land). */
while (p >= text_start
&& ((insn = read_memory_integer (p, 4)) & 0xff000000) != 0)
&& ((insn = read_memory_integer (p, 4)) & TAGWORD_ZERO_MASK) != 0)
p -= 4;
if (p < text_start)
@ -524,11 +529,15 @@ read_register_stack (memaddr, myaddr, actual_mem_addr, lval)
if (actual_mem_addr != NULL)
*actual_mem_addr = REGISTER_BYTE (regnum);
}
else if (memaddr < rfb)
/* If it's in the part of the register stack that's in real registers,
get the value from the registers. If it's anywhere else in memory
(e.g. in another thread's saved stack), skip this part and get
it from real live memory. */
else if (memaddr < rfb && memaddr >= rsp)
{
/* It's in a register. */
int regnum = (memaddr - rsp) / 4 + LR0_REGNUM;
if (regnum < LR0_REGNUM || regnum > LR0_REGNUM + 127)
if (regnum > LR0_REGNUM + 127)
error ("Attempt to read register stack out of range.");
if (myaddr != NULL)
read_register_gen (regnum, myaddr);
@ -733,7 +742,7 @@ pop_frame ()
{
/* Note: word is in host byte order. */
word = read_memory_integer (rfb + i, 4);
write_register (LR0_REGNUM + ((rfb - gr1) % 0x80) + i / 4, word);
write_register (LR0_REGNUM + ((rfb - gr1) % 0x80) + i / 4, word);
}
}
flush_cached_frames ();
@ -797,6 +806,7 @@ push_dummy_frame ()
write_register (lrnum, read_register (NPC_REGNUM));
}
void
_initialize_29k()
{