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@@ -20,8 +20,34 @@
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#define _PARISC64_KERNEL_SIGNAL32_H
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#include <linux/compat.h>
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-#include <asm/compat_signal.h>
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-#include <asm/compat_rt_sigframe.h>
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+
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+typedef compat_uptr_t compat_sighandler_t;
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+
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+typedef struct compat_sigaltstack {
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+ compat_uptr_t ss_sp;
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+ compat_int_t ss_flags;
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+ compat_size_t ss_size;
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+} compat_stack_t;
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+
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+/* Most things should be clean enough to redefine this at will, if care
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+ is taken to make libc match. */
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+
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+struct compat_sigaction {
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+ compat_sighandler_t sa_handler;
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+ compat_uint_t sa_flags;
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+ compat_sigset_t sa_mask; /* mask last for extensibility */
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+};
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+
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+/* 32-bit ucontext as seen from an 64-bit kernel */
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+struct compat_ucontext {
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+ compat_uint_t uc_flags;
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+ compat_uptr_t uc_link;
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+ compat_stack_t uc_stack; /* struct compat_sigaltstack (12 bytes)*/
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+ /* FIXME: Pad out to get uc_mcontext to start at an 8-byte aligned boundary */
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+ compat_uint_t pad[1];
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+ struct compat_sigcontext uc_mcontext;
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+ compat_sigset_t uc_sigmask; /* mask last for extensibility */
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+};
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/* ELF32 signal handling */
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@@ -29,6 +55,103 @@ struct k_sigaction32 {
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struct compat_sigaction sa;
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};
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+typedef struct compat_siginfo {
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+ int si_signo;
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+ int si_errno;
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+ int si_code;
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+
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+ union {
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+ int _pad[((128/sizeof(int)) - 3)];
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+
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+ /* kill() */
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+ struct {
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+ unsigned int _pid; /* sender's pid */
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+ unsigned int _uid; /* sender's uid */
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+ } _kill;
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+
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+ /* POSIX.1b timers */
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+ struct {
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+ compat_timer_t _tid; /* timer id */
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+ int _overrun; /* overrun count */
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+ char _pad[sizeof(unsigned int) - sizeof(int)];
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+ compat_sigval_t _sigval; /* same as below */
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+ int _sys_private; /* not to be passed to user */
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+ } _timer;
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+
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+ /* POSIX.1b signals */
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+ struct {
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+ unsigned int _pid; /* sender's pid */
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+ unsigned int _uid; /* sender's uid */
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+ compat_sigval_t _sigval;
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+ } _rt;
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+
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+ /* SIGCHLD */
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+ struct {
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+ unsigned int _pid; /* which child */
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+ unsigned int _uid; /* sender's uid */
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+ int _status; /* exit code */
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+ compat_clock_t _utime;
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+ compat_clock_t _stime;
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+ } _sigchld;
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+
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+ /* SIGILL, SIGFPE, SIGSEGV, SIGBUS */
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+ struct {
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+ unsigned int _addr; /* faulting insn/memory ref. */
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+ } _sigfault;
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+
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+ /* SIGPOLL */
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+ struct {
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+ int _band; /* POLL_IN, POLL_OUT, POLL_MSG */
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+ int _fd;
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+ } _sigpoll;
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+ } _sifields;
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+} compat_siginfo_t;
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+
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+int copy_siginfo_to_user32 (compat_siginfo_t __user *to, siginfo_t *from);
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+int copy_siginfo_from_user32 (siginfo_t *to, compat_siginfo_t __user *from);
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+
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+/* In a deft move of uber-hackery, we decide to carry the top half of all
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+ * 64-bit registers in a non-portable, non-ABI, hidden structure.
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+ * Userspace can read the hidden structure if it *wants* but is never
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+ * guaranteed to be in the same place. Infact the uc_sigmask from the
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+ * ucontext_t structure may push the hidden register file downards
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+ */
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+struct compat_regfile {
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+ /* Upper half of all the 64-bit registers that were truncated
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+ on a copy to a 32-bit userspace */
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+ compat_int_t rf_gr[32];
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+ compat_int_t rf_iasq[2];
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+ compat_int_t rf_iaoq[2];
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+ compat_int_t rf_sar;
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+};
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+
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+#define COMPAT_SIGRETURN_TRAMP 4
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+#define COMPAT_SIGRESTARTBLOCK_TRAMP 5
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+#define COMPAT_TRAMP_SIZE (COMPAT_SIGRETURN_TRAMP + \
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+ COMPAT_SIGRESTARTBLOCK_TRAMP)
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+
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+struct compat_rt_sigframe {
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+ /* XXX: Must match trampoline size in arch/parisc/kernel/signal.c
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+ Secondary to that it must protect the ERESTART_RESTARTBLOCK
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+ trampoline we left on the stack (we were bad and didn't
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+ change sp so we could run really fast.) */
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+ compat_uint_t tramp[COMPAT_TRAMP_SIZE];
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+ compat_siginfo_t info;
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+ struct compat_ucontext uc;
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+ /* Hidden location of truncated registers, *must* be last. */
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+ struct compat_regfile regs;
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+};
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+
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+/*
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+ * The 32-bit ABI wants at least 48 bytes for a function call frame:
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+ * 16 bytes for arg0-arg3, and 32 bytes for magic (the only part of
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+ * which Linux/parisc uses is sp-20 for the saved return pointer...)
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+ * Then, the stack pointer must be rounded to a cache line (64 bytes).
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+ */
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+#define SIGFRAME32 64
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+#define FUNCTIONCALLFRAME32 48
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+#define PARISC_RT_SIGFRAME_SIZE32 (((sizeof(struct compat_rt_sigframe) + FUNCTIONCALLFRAME32) + SIGFRAME32) & -SIGFRAME32)
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+
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void sigset_32to64(sigset_t *s64, compat_sigset_t *s32);
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void sigset_64to32(compat_sigset_t *s32, sigset_t *s64);
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int do_sigaltstack32 (const compat_stack_t __user *uss32,
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Kyle McMartin