forge/linux-pinenote
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

sparc: Align clone and signal stacks to 16 bytes.

Browse source 
This is mandatory for 64-bit processes, and doing it also for 32-bit
processes saves a conditional in the compat case.

This fixes the glibc/nptl/tst-stdio1 test case, as well
as many others, on 64-bit.

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2010-02-09 16:18:40 -08:00
parent 6abce7711f
commit f036d9f398
5 changed files with 20 additions and 14 deletions
Download patch file Download diff file Expand all files Collapse all files

6
arch/sparc/kernel/signal_32.c
View file

@ -267,15 +267,17 @@ static inline void __user *get_sigframe(struct sigaction *sa, struct pt_regs *re
sp = current->sas_ss_sp + current->sas_ss_size;
}
sp -= framesize;
/* Always align the stack frame. This handles two cases. First,
* sigaltstack need not be mindful of platform specific stack
* alignment. Second, if we took this signal because the stack
* is not aligned properly, we'd like to take the signal cleanly
* and report that.
*/
sp &= ~7UL;
sp &= ~15UL;
return (void __user *)(sp - framesize);
return (void __user *) sp;
}
static inline int