[PARISC] Arch-specific compat signals
Add enough arch-specific compat signals code to enable parisc64 to compile and boot out of the mainline tree. There are likely still many dragons here, but this is a start to squashing the last big difference between the mainline tree and the parisc-linux tree. The remaining bugs can be squashed as they come up. Signed-off-by: Kyle McMartin <kyle@parisc-linux.org>
This commit is contained in:
Kyle McMartin
committed by
Kyle McMartin
Kyle McMartin
parent
16541c8745
commit
f671c45df2
@ -20,8 +20,34 @@
|
||||
#define _PARISC64_KERNEL_SIGNAL32_H
|
||||
|
||||
#include <linux/compat.h>
|
||||
#include <asm/compat_signal.h>
|
||||
#include <asm/compat_rt_sigframe.h>
|
||||
|
||||
typedef compat_uptr_t compat_sighandler_t;
|
||||
|
||||
typedef struct compat_sigaltstack {
|
||||
compat_uptr_t ss_sp;
|
||||
compat_int_t ss_flags;
|
||||
compat_size_t ss_size;
|
||||
} compat_stack_t;
|
||||
|
||||
/* Most things should be clean enough to redefine this at will, if care
|
||||
is taken to make libc match. */
|
||||
|
||||
struct compat_sigaction {
|
||||
compat_sighandler_t sa_handler;
|
||||
compat_uint_t sa_flags;
|
||||
compat_sigset_t sa_mask; /* mask last for extensibility */
|
||||
};
|
||||
|
||||
/* 32-bit ucontext as seen from an 64-bit kernel */
|
||||
struct compat_ucontext {
|
||||
compat_uint_t uc_flags;
|
||||
compat_uptr_t uc_link;
|
||||
compat_stack_t uc_stack; /* struct compat_sigaltstack (12 bytes)*/
|
||||
/* FIXME: Pad out to get uc_mcontext to start at an 8-byte aligned boundary */
|
||||
compat_uint_t pad[1];
|
||||
struct compat_sigcontext uc_mcontext;
|
||||
compat_sigset_t uc_sigmask; /* mask last for extensibility */
|
||||
};
|
||||
|
||||
/* ELF32 signal handling */
|
||||
|
||||
@ -29,6 +55,103 @@ struct k_sigaction32 {
|
||||
struct compat_sigaction sa;
|
||||
};
|
||||
|
||||
typedef struct compat_siginfo {
|
||||
int si_signo;
|
||||
int si_errno;
|
||||
int si_code;
|
||||
|
||||
union {
|
||||
int _pad[((128/sizeof(int)) - 3)];
|
||||
|
||||
/* kill() */
|
||||
struct {
|
||||
unsigned int _pid; /* sender's pid */
|
||||
unsigned int _uid; /* sender's uid */
|
||||
} _kill;
|
||||
|
||||
/* POSIX.1b timers */
|
||||
struct {
|
||||
compat_timer_t _tid; /* timer id */
|
||||
int _overrun; /* overrun count */
|
||||
char _pad[sizeof(unsigned int) - sizeof(int)];
|
||||
compat_sigval_t _sigval; /* same as below */
|
||||
int _sys_private; /* not to be passed to user */
|
||||
} _timer;
|
||||
|
||||
/* POSIX.1b signals */
|
||||
struct {
|
||||
unsigned int _pid; /* sender's pid */
|
||||
unsigned int _uid; /* sender's uid */
|
||||
compat_sigval_t _sigval;
|
||||
} _rt;
|
||||
|
||||
/* SIGCHLD */
|
||||
struct {
|
||||
unsigned int _pid; /* which child */
|
||||
unsigned int _uid; /* sender's uid */
|
||||
int _status; /* exit code */
|
||||
compat_clock_t _utime;
|
||||
compat_clock_t _stime;
|
||||
} _sigchld;
|
||||
|
||||
/* SIGILL, SIGFPE, SIGSEGV, SIGBUS */
|
||||
struct {
|
||||
unsigned int _addr; /* faulting insn/memory ref. */
|
||||
} _sigfault;
|
||||
|
||||
/* SIGPOLL */
|
||||
struct {
|
||||
int _band; /* POLL_IN, POLL_OUT, POLL_MSG */
|
||||
int _fd;
|
||||
} _sigpoll;
|
||||
} _sifields;
|
||||
} compat_siginfo_t;
|
||||
|
||||
int copy_siginfo_to_user32 (compat_siginfo_t __user *to, siginfo_t *from);
|
||||
int copy_siginfo_from_user32 (siginfo_t *to, compat_siginfo_t __user *from);
|
||||
|
||||
/* 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)
|
||||
|
||||
void sigset_32to64(sigset_t *s64, compat_sigset_t *s32);
|
||||
void sigset_64to32(compat_sigset_t *s32, sigset_t *s64);
|
||||
int do_sigaltstack32 (const compat_stack_t __user *uss32,
|
||||
|
||||
Reference in New Issue
Block a user