mirror of
https://github.com/reactos/reactos.git
synced 2024-12-27 09:34:43 +00:00
63 lines
1.6 KiB
C
63 lines
1.6 KiB
C
/*
|
|
* Dwarf address ranges parsing code.
|
|
*/
|
|
|
|
#include <precomp.h>
|
|
|
|
#define NDEBUG
|
|
#include <debug.h>
|
|
|
|
int
|
|
dwarfaddrtounit(Dwarf *d, ulong addr, ulong *unit)
|
|
{
|
|
DwarfBuf b;
|
|
int segsize, i;
|
|
ulong len, id, off, base, size;
|
|
uchar *start, *end;
|
|
|
|
memset(&b, 0, sizeof b);
|
|
b.d = d;
|
|
b.p = d->aranges.data;
|
|
b.ep = b.p + d->aranges.len;
|
|
|
|
while(b.p < b.ep){
|
|
start = b.p;
|
|
len = dwarfget4(&b);
|
|
if (!len) { b.ep = b.p - 4; return -1; }
|
|
if((id = dwarfget2(&b)) != 2){
|
|
if(b.p == nil){
|
|
underflow:
|
|
werrstr("buffer underflow reading address ranges header");
|
|
}else
|
|
werrstr("bad dwarf version 0x%x in address ranges header", id);
|
|
return -1;
|
|
}
|
|
off = dwarfget4(&b);
|
|
b.addrsize = dwarfget1(&b);
|
|
if(d->addrsize == 0)
|
|
d->addrsize = b.addrsize;
|
|
segsize = dwarfget1(&b);
|
|
USED(segsize); /* what am i supposed to do with this? */
|
|
if(b.p == nil)
|
|
goto underflow;
|
|
if((i = (b.p-start) % (2*b.addrsize)) != 0)
|
|
b.p += 2*b.addrsize - i;
|
|
end = start+4+len;
|
|
while(b.p!=nil && b.p<end){
|
|
base = dwarfgetaddr(&b);
|
|
size = dwarfgetaddr(&b);
|
|
if (!size) continue;
|
|
if(b.p == nil)
|
|
goto underflow;
|
|
if(base <= addr && addr < base+size){
|
|
*unit = off;
|
|
return 0;
|
|
}
|
|
}
|
|
if(b.p == nil)
|
|
goto underflow;
|
|
b.p = end;
|
|
}
|
|
werrstr("address 0x%lux is not listed in dwarf debugging symbols", addr);
|
|
return -1;
|
|
}
|