On Wed, 21 Aug 2013 17:44:03 EDT erik quanstrom quans...@quanstro.net wrote:
i think a bug is setting inuxi8[i+4] = inuxi8[i] for 0=i4.
mikro; diffy -c *.c
diff -c /n/dump/2013/0821/sys/src/cmd/6l/obj.c obj.c
/n/dump/2013/0821/sys/src/cmd/6l/obj.c:1455,1471 - obj.c:1455,1471
int i, c;
i think a bug is setting inuxi8[i+4] = inuxi8[i] for 0=i4.
mikro; diffy -c *.c
diff -c /n/dump/2013/0821/sys/src/cmd/6l/obj.c obj.c
/n/dump/2013/0821/sys/src/cmd/6l/obj.c:1455,1471 - obj.c:1455,1471
int i, c;
for(i=0; i4; i++) {
- c = find1(0x04030201L, i+1);
vc vlongs are broken for cast
for example, _v2uc produces the code:
acid; asm(_v2uc)
_v2uc 0x5360MOVWrv+8(FP),R1
_v2uc+0x4 0x5364JMP (R31)
_v2uc+0x8 0x5368AND $0xff,R1
i think this should be
MOVWrv+12(FP),R1
JMP (R31)
AND
On Wed, 21 Aug 2013 14:36:40 EDT erik quanstrom quans...@quanstro.net wrote:
uvlong x;
x = 0x012345678abcdefull;
print((uchar)x %.2ux\n, (uchar)x);
...
x = 0012345678abcdef
(uchar)x ef
You're casting a large int into a small int and this seems right.
Just as
You're casting a large int into a small int and this seems right.
Just as (uchar)0x1234 = 0x34
marshalling a 64-bit pointer in this way will lay down the
bytes with the hi and lo reversed.
Perhaps you meant to do *(uchar*)x?
you're right. what was i thinking. still, pointers are
On Aug 21, 2013, at 11:57 AM, erik quanstrom quans...@quanstro.net wrote:
You're casting a large int into a small int and this seems right.
Just as (uchar)0x1234 = 0x34
marshalling a 64-bit pointer in this way will lay down the
bytes with the hi and lo reversed.
Perhaps you meant to do
How %p is treated is really upto the implementation but
it should not crash since p is never dereferenced. Does
this work?
uintptr q;
print(%p, q);
no. if i change the print to print an integer, it still fails.
in fact, it's really the indirect call in print that fails.
this
#include u.h
#include libc.h
void
f(void)
{
write(1, hello\n, 6);
}
void (*call)(void) = f;
void
main(void)
{
call();
exits();
}
the asm is the same when compiled on any arch,
; acid 6.crash4-mips
6.crash4-mips:amd64 plan 9 executable
/sys/lib/acid/port
