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This commit is contained in:
Jim Kingdon 1991-04-19 03:22:12 +00:00
parent b6a3c755c7
commit 31ef19fc7f
5 changed files with 100 additions and 12 deletions
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83
gdb/breakpoint.c
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@ -294,6 +294,89 @@ End with a line saying just \"end\".\n", bnum);
error ("No breakpoint number %d.", bnum);
}
extern int memory_breakpoint_size; /* from mem-break.c */
/* Like target_read_memory() but if breakpoints are inserted, return
the shadow contents instead of the breakpoints themselves. */
int
read_memory_nobpt (memaddr, myaddr, len)
CORE_ADDR memaddr;
char *myaddr;
unsigned len;
{
int status;
struct breakpoint *b;
if (memory_breakpoint_size < 0)
/* No breakpoints on this machine. */
return target_read_memory (memaddr, myaddr, len);
ALL_BREAKPOINTS (b)
{
if (b->address == NULL || !b->inserted)
continue;
else if (b->address + memory_breakpoint_size <= memaddr)
/* The breakpoint is entirely before the chunk of memory
we are reading. */
continue;
else if (b->address >= memaddr + len)
/* The breakpoint is entirely after the chunk of memory we
are reading. */
continue;
else
{
/* Copy the breakpoint from the shadow contents, and recurse
for the things before and after. */
/* Addresses and length of the part of the breakpoint that
we need to copy. */
CORE_ADDR membpt = b->address;
unsigned int bptlen = memory_breakpoint_size;
/* Offset within shadow_contents. */
int bptoffset = 0;
if (membpt < memaddr)
{
/* Only copy the second part of the breakpoint. */
bptlen -= memaddr - membpt;
bptoffset = memaddr - membpt;
membpt = memaddr;
}
if (membpt + bptlen > memaddr + len)
{
/* Only copy the first part of the breakpoint. */
bptlen -= (membpt + bptlen) - (memaddr + len);
}
bcopy (b->shadow_contents + bptoffset,
myaddr + membpt - memaddr, bptlen);
if (membpt > memaddr)
{
/* Copy the section of memory before the breakpoint. */
status = read_memory_nobpt (memaddr, myaddr, membpt - memaddr);
if (status != 0)
return status;
}
if (membpt + bptlen < memaddr + len)
{
/* Copy the section of memory after the breakpoint. */
status = read_memory_nobpt
(membpt + bptlen,
myaddr + membpt + bptlen - memaddr,
memaddr + len - (membpt + bptlen));
if (status != 0)
return status;
}
return 0;
}
}
/* Nothing overlaps. Just call read_memory_noerr. */
return target_read_memory (memaddr, myaddr, len);
}
/* insert_breakpoints is used when starting or continuing the program.
remove_breakpoints is used when the program stops.
Both return zero if successful,