mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-27 06:34:11 +08:00
51 lines
1.8 KiB
C
51 lines
1.8 KiB
C
|
#include<linux/compat.h>
|
||
|
|
#include<linux/compat_siginfo.h>
|
||
|
|
#include<asm/compat_ucontext.h>
|
||
|
|
|
||
|
|
#ifndef _ASM_PARISC_COMPAT_RT_SIGFRAME_H
|
||
|
|
#define _ASM_PARISC_COMPAT_RT_SIGFRAME_H
|
||
|
|
|
||
|
|
/* In a deft move of uber-hackery, we decide to carry the top half of all
|
||
|
|
* 64-bit registers in a non-portable, non-ABI, hidden structure.
|
||
|
|
* Userspace can read the hidden structure if it *wants* but is never
|
||
|
|
* guaranteed to be in the same place. Infact the uc_sigmask from the
|
||
|
|
* ucontext_t structure may push the hidden register file downards
|
||
|
|
*/
|
||
|
|
struct compat_regfile {
|
||
|
|
/* Upper half of all the 64-bit registers that were truncated
|
||
|
|
on a copy to a 32-bit userspace */
|
||
|
|
compat_int_t rf_gr[32];
|
||
|
|
compat_int_t rf_iasq[2];
|
||
|
|
compat_int_t rf_iaoq[2];
|
||
|
|
compat_int_t rf_sar;
|
||
|
|
};
|
||
|
|
|
||
|
|
#define COMPAT_SIGRETURN_TRAMP 4
|
||
|
|
#define COMPAT_SIGRESTARTBLOCK_TRAMP 5
|
||
|
|
#define COMPAT_TRAMP_SIZE (COMPAT_SIGRETURN_TRAMP + COMPAT_SIGRESTARTBLOCK_TRAMP)
|
||
|
|
|
||
|
|
struct compat_rt_sigframe {
|
||
|
|
/* XXX: Must match trampoline size in arch/parisc/kernel/signal.c
|
||
|
|
Secondary to that it must protect the ERESTART_RESTARTBLOCK
|
||
|
|
trampoline we left on the stack (we were bad and didn't
|
||
|
|
change sp so we could run really fast.) */
|
||
|
|
compat_uint_t tramp[COMPAT_TRAMP_SIZE];
|
||
|
|
compat_siginfo_t info;
|
||
|
|
struct compat_ucontext uc;
|
||
|
|
/* Hidden location of truncated registers, *must* be last. */
|
||
|
|
struct compat_regfile regs;
|
||
|
|
};
|
||
|
|
|
||
|
|
/*
|
||
|
|
* The 32-bit ABI wants at least 48 bytes for a function call frame:
|
||
|
|
* 16 bytes for arg0-arg3, and 32 bytes for magic (the only part of
|
||
|
|
* which Linux/parisc uses is sp-20 for the saved return pointer...)
|
||
|
|
* Then, the stack pointer must be rounded to a cache line (64 bytes).
|
||
|
|
*/
|
||
|
|
#define SIGFRAME32 64
|
||
|
|
#define FUNCTIONCALLFRAME32 48
|
||
|
|
#define PARISC_RT_SIGFRAME_SIZE32 \
|
||
|
|
(((sizeof(struct compat_rt_sigframe) + FUNCTIONCALLFRAME32) + SIGFRAME32) & -SIGFRAME32)
|
||
|
|
|
||
|
|
#endif
|