^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) * linux/arch/m68k/kernel/signal.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Copyright (C) 1991, 1992 Linus Torvalds
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * This file is subject to the terms and conditions of the GNU General Public
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * License. See the file COPYING in the main directory of this archive
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * for more details.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) * Linux/m68k support by Hamish Macdonald
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) * 68060 fixes by Jesper Skov
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) * 1997-12-01 Modified for POSIX.1b signals by Andreas Schwab
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) * mathemu support by Roman Zippel
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) * (Note: fpstate in the signal context is completely ignored for the emulator
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) * and the internal floating point format is put on stack)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) * ++roman (07/09/96): implemented signal stacks (specially for tosemu on
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) * Atari :-) Current limitation: Only one sigstack can be active at one time.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) * If a second signal with SA_ONSTACK set arrives while working on a sigstack,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) * SA_ONSTACK is ignored. This behaviour avoids lots of trouble with nested
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) * signal handlers!
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #include <linux/sched.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #include <linux/mm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) #include <linux/signal.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) #include <linux/syscalls.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) #include <linux/wait.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) #include <linux/ptrace.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) #include <linux/unistd.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) #include <linux/stddef.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) #include <linux/highuid.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) #include <linux/personality.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) #include <linux/tty.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) #include <linux/binfmts.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) #include <linux/extable.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) #include <linux/tracehook.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) #include <asm/setup.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) #include <linux/uaccess.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) #include <asm/traps.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) #include <asm/ucontext.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) #include <asm/cacheflush.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) #ifdef CONFIG_MMU
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) * Handle the slight differences in classic 68k and ColdFire trap frames.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) #ifdef CONFIG_COLDFIRE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) #define FORMAT 4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) #define FMT4SIZE 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) #define FORMAT 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) #define FMT4SIZE sizeof_field(struct frame, un.fmt4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) static const int frame_size_change[16] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) [1] = -1, /* sizeof_field(struct frame, un.fmt1), */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) [2] = sizeof_field(struct frame, un.fmt2),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) [3] = sizeof_field(struct frame, un.fmt3),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) [4] = FMT4SIZE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) [5] = -1, /* sizeof_field(struct frame, un.fmt5), */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) [6] = -1, /* sizeof_field(struct frame, un.fmt6), */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) [7] = sizeof_field(struct frame, un.fmt7),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) [8] = -1, /* sizeof_field(struct frame, un.fmt8), */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) [9] = sizeof_field(struct frame, un.fmt9),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) [10] = sizeof_field(struct frame, un.fmta),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) [11] = sizeof_field(struct frame, un.fmtb),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) [12] = -1, /* sizeof_field(struct frame, un.fmtc), */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) [13] = -1, /* sizeof_field(struct frame, un.fmtd), */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) [14] = -1, /* sizeof_field(struct frame, un.fmte), */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) [15] = -1, /* sizeof_field(struct frame, un.fmtf), */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) static inline int frame_extra_sizes(int f)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) return frame_size_change[f];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) int fixup_exception(struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) const struct exception_table_entry *fixup;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) struct pt_regs *tregs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) /* Are we prepared to handle this kernel fault? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) fixup = search_exception_tables(regs->pc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) if (!fixup)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) /* Create a new four word stack frame, discarding the old one. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) regs->stkadj = frame_extra_sizes(regs->format);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) tregs = (struct pt_regs *)((long)regs + regs->stkadj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) tregs->vector = regs->vector;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) tregs->format = FORMAT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) tregs->pc = fixup->fixup;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) tregs->sr = regs->sr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) static inline void push_cache (unsigned long vaddr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) * Using the old cache_push_v() was really a big waste.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) * What we are trying to do is to flush 8 bytes to ram.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) * Flushing 2 cache lines of 16 bytes is much cheaper than
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) * flushing 1 or 2 pages, as previously done in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) * cache_push_v().
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) * Jes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) if (CPU_IS_040) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) unsigned long temp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) __asm__ __volatile__ (".chip 68040\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) "nop\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) "ptestr (%1)\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) "movec %%mmusr,%0\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) ".chip 68k"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) : "=r" (temp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) : "a" (vaddr));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) temp &= PAGE_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) temp |= vaddr & ~PAGE_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) __asm__ __volatile__ (".chip 68040\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) "nop\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) "cpushl %%bc,(%0)\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) ".chip 68k"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) : : "a" (temp));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) else if (CPU_IS_060) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) unsigned long temp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) __asm__ __volatile__ (".chip 68060\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) "plpar (%0)\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) ".chip 68k"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) : "=a" (temp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) : "0" (vaddr));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) __asm__ __volatile__ (".chip 68060\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) "cpushl %%bc,(%0)\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) ".chip 68k"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) : : "a" (temp));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) } else if (!CPU_IS_COLDFIRE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) * 68030/68020 have no writeback cache;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) * still need to clear icache.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) * Note that vaddr is guaranteed to be long word aligned.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) unsigned long temp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) asm volatile ("movec %%cacr,%0" : "=r" (temp));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) temp += 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) asm volatile ("movec %0,%%caar\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) "movec %1,%%cacr"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) : : "r" (vaddr), "r" (temp));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) asm volatile ("movec %0,%%caar\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) "movec %1,%%cacr"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) : : "r" (vaddr + 4), "r" (temp));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) /* CPU_IS_COLDFIRE */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) #if defined(CONFIG_CACHE_COPYBACK)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) flush_cf_dcache(0, DCACHE_MAX_ADDR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) /* Invalidate instruction cache for the pushed bytes */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) clear_cf_icache(vaddr, vaddr + 8);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) static inline void adjustformat(struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) static inline void save_a5_state(struct sigcontext *sc, struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) #else /* CONFIG_MMU */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) void ret_from_user_signal(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) void ret_from_user_rt_signal(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) static inline int frame_extra_sizes(int f)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) /* No frame size adjustments required on non-MMU CPUs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) static inline void adjustformat(struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) * set format byte to make stack appear modulo 4, which it will
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) * be when doing the rte
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) regs->format = 0x4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) static inline void save_a5_state(struct sigcontext *sc, struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) sc->sc_a5 = ((struct switch_stack *)regs - 1)->a5;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) static inline void push_cache(unsigned long vaddr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) #endif /* CONFIG_MMU */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) * Do a signal return; undo the signal stack.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) * Keep the return code on the stack quadword aligned!
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) * That makes the cache flush below easier.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) struct sigframe
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) char __user *pretcode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) int sig;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) int code;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) struct sigcontext __user *psc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) char retcode[8];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) unsigned long extramask[_NSIG_WORDS-1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) struct sigcontext sc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) struct rt_sigframe
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) char __user *pretcode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) int sig;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) struct siginfo __user *pinfo;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) void __user *puc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) char retcode[8];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) struct siginfo info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) struct ucontext uc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) #define FPCONTEXT_SIZE 216
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) #define uc_fpstate uc_filler[0]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) #define uc_formatvec uc_filler[FPCONTEXT_SIZE/4]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) #define uc_extra uc_filler[FPCONTEXT_SIZE/4+1]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) #ifdef CONFIG_FPU
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) static unsigned char fpu_version; /* version number of fpu, set by setup_frame */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) static inline int restore_fpu_state(struct sigcontext *sc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) int err = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) if (FPU_IS_EMU) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) /* restore registers */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) memcpy(current->thread.fpcntl, sc->sc_fpcntl, 12);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) memcpy(current->thread.fp, sc->sc_fpregs, 24);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) if (CPU_IS_060 ? sc->sc_fpstate[2] : sc->sc_fpstate[0]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) /* Verify the frame format. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) if (!(CPU_IS_060 || CPU_IS_COLDFIRE) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) (sc->sc_fpstate[0] != fpu_version))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) if (CPU_IS_020_OR_030) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) if (m68k_fputype & FPU_68881 &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) !(sc->sc_fpstate[1] == 0x18 || sc->sc_fpstate[1] == 0xb4))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) if (m68k_fputype & FPU_68882 &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) !(sc->sc_fpstate[1] == 0x38 || sc->sc_fpstate[1] == 0xd4))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) } else if (CPU_IS_040) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) if (!(sc->sc_fpstate[1] == 0x00 ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) sc->sc_fpstate[1] == 0x28 ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) sc->sc_fpstate[1] == 0x60))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) } else if (CPU_IS_060) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) if (!(sc->sc_fpstate[3] == 0x00 ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) sc->sc_fpstate[3] == 0x60 ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) sc->sc_fpstate[3] == 0xe0))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) } else if (CPU_IS_COLDFIRE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) if (!(sc->sc_fpstate[0] == 0x00 ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) sc->sc_fpstate[0] == 0x05 ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) sc->sc_fpstate[0] == 0xe5))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) if (CPU_IS_COLDFIRE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) __asm__ volatile ("fmovemd %0,%%fp0-%%fp1\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) "fmovel %1,%%fpcr\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) "fmovel %2,%%fpsr\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) "fmovel %3,%%fpiar"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) : /* no outputs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) : "m" (sc->sc_fpregs[0]),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) "m" (sc->sc_fpcntl[0]),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) "m" (sc->sc_fpcntl[1]),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) "m" (sc->sc_fpcntl[2]));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) __asm__ volatile (".chip 68k/68881\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) "fmovemx %0,%%fp0-%%fp1\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) "fmoveml %1,%%fpcr/%%fpsr/%%fpiar\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) ".chip 68k"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) : /* no outputs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) : "m" (*sc->sc_fpregs),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) "m" (*sc->sc_fpcntl));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) if (CPU_IS_COLDFIRE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) __asm__ volatile ("frestore %0" : : "m" (*sc->sc_fpstate));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) __asm__ volatile (".chip 68k/68881\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) "frestore %0\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) ".chip 68k"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) : : "m" (*sc->sc_fpstate));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) static inline int rt_restore_fpu_state(struct ucontext __user *uc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) unsigned char fpstate[FPCONTEXT_SIZE];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) int context_size = CPU_IS_060 ? 8 : (CPU_IS_COLDFIRE ? 12 : 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) fpregset_t fpregs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) int err = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) if (FPU_IS_EMU) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) /* restore fpu control register */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) if (__copy_from_user(current->thread.fpcntl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) uc->uc_mcontext.fpregs.f_fpcntl, 12))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) /* restore all other fpu register */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) if (__copy_from_user(current->thread.fp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) uc->uc_mcontext.fpregs.f_fpregs, 96))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) if (__get_user(*(long *)fpstate, (long __user *)&uc->uc_fpstate))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) if (CPU_IS_060 ? fpstate[2] : fpstate[0]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) if (!(CPU_IS_060 || CPU_IS_COLDFIRE))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) context_size = fpstate[1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) /* Verify the frame format. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) if (!(CPU_IS_060 || CPU_IS_COLDFIRE) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) (fpstate[0] != fpu_version))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) if (CPU_IS_020_OR_030) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) if (m68k_fputype & FPU_68881 &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) !(context_size == 0x18 || context_size == 0xb4))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) if (m68k_fputype & FPU_68882 &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) !(context_size == 0x38 || context_size == 0xd4))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) } else if (CPU_IS_040) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) if (!(context_size == 0x00 ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) context_size == 0x28 ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) context_size == 0x60))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) } else if (CPU_IS_060) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) if (!(fpstate[3] == 0x00 ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) fpstate[3] == 0x60 ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) fpstate[3] == 0xe0))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) } else if (CPU_IS_COLDFIRE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) if (!(fpstate[3] == 0x00 ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) fpstate[3] == 0x05 ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) fpstate[3] == 0xe5))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) if (__copy_from_user(&fpregs, &uc->uc_mcontext.fpregs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) sizeof(fpregs)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) if (CPU_IS_COLDFIRE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) __asm__ volatile ("fmovemd %0,%%fp0-%%fp7\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) "fmovel %1,%%fpcr\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) "fmovel %2,%%fpsr\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) "fmovel %3,%%fpiar"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) : /* no outputs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) : "m" (fpregs.f_fpregs[0]),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) "m" (fpregs.f_fpcntl[0]),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) "m" (fpregs.f_fpcntl[1]),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) "m" (fpregs.f_fpcntl[2]));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) __asm__ volatile (".chip 68k/68881\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) "fmovemx %0,%%fp0-%%fp7\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) "fmoveml %1,%%fpcr/%%fpsr/%%fpiar\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) ".chip 68k"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) : /* no outputs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) : "m" (*fpregs.f_fpregs),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) "m" (*fpregs.f_fpcntl));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) if (context_size &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) __copy_from_user(fpstate + 4, (long __user *)&uc->uc_fpstate + 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) context_size))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) if (CPU_IS_COLDFIRE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) __asm__ volatile ("frestore %0" : : "m" (*fpstate));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) __asm__ volatile (".chip 68k/68881\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) "frestore %0\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) ".chip 68k"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) : : "m" (*fpstate));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) * Set up a signal frame.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) static inline void save_fpu_state(struct sigcontext *sc, struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) if (FPU_IS_EMU) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) /* save registers */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) memcpy(sc->sc_fpcntl, current->thread.fpcntl, 12);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) memcpy(sc->sc_fpregs, current->thread.fp, 24);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) if (CPU_IS_COLDFIRE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) __asm__ volatile ("fsave %0"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) : : "m" (*sc->sc_fpstate) : "memory");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) __asm__ volatile (".chip 68k/68881\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) "fsave %0\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) ".chip 68k"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) : : "m" (*sc->sc_fpstate) : "memory");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) if (CPU_IS_060 ? sc->sc_fpstate[2] : sc->sc_fpstate[0]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) fpu_version = sc->sc_fpstate[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) if (CPU_IS_020_OR_030 && !regs->stkadj &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) regs->vector >= (VEC_FPBRUC * 4) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) regs->vector <= (VEC_FPNAN * 4)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) /* Clear pending exception in 68882 idle frame */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) if (*(unsigned short *) sc->sc_fpstate == 0x1f38)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) sc->sc_fpstate[0x38] |= 1 << 3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) if (CPU_IS_COLDFIRE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) __asm__ volatile ("fmovemd %%fp0-%%fp1,%0\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) "fmovel %%fpcr,%1\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) "fmovel %%fpsr,%2\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) "fmovel %%fpiar,%3"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) : "=m" (sc->sc_fpregs[0]),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) "=m" (sc->sc_fpcntl[0]),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) "=m" (sc->sc_fpcntl[1]),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) "=m" (sc->sc_fpcntl[2])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) : /* no inputs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) : "memory");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) __asm__ volatile (".chip 68k/68881\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) "fmovemx %%fp0-%%fp1,%0\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) "fmoveml %%fpcr/%%fpsr/%%fpiar,%1\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) ".chip 68k"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) : "=m" (*sc->sc_fpregs),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) "=m" (*sc->sc_fpcntl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) : /* no inputs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) : "memory");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) static inline int rt_save_fpu_state(struct ucontext __user *uc, struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) unsigned char fpstate[FPCONTEXT_SIZE];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) int context_size = CPU_IS_060 ? 8 : (CPU_IS_COLDFIRE ? 12 : 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) int err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) if (FPU_IS_EMU) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) /* save fpu control register */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) err |= copy_to_user(uc->uc_mcontext.fpregs.f_fpcntl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) current->thread.fpcntl, 12);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) /* save all other fpu register */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) err |= copy_to_user(uc->uc_mcontext.fpregs.f_fpregs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) current->thread.fp, 96);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) if (CPU_IS_COLDFIRE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) __asm__ volatile ("fsave %0" : : "m" (*fpstate) : "memory");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) __asm__ volatile (".chip 68k/68881\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) "fsave %0\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) ".chip 68k"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) : : "m" (*fpstate) : "memory");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) err |= __put_user(*(long *)fpstate, (long __user *)&uc->uc_fpstate);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) if (CPU_IS_060 ? fpstate[2] : fpstate[0]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) fpregset_t fpregs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) if (!(CPU_IS_060 || CPU_IS_COLDFIRE))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) context_size = fpstate[1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) fpu_version = fpstate[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) if (CPU_IS_020_OR_030 && !regs->stkadj &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) regs->vector >= (VEC_FPBRUC * 4) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) regs->vector <= (VEC_FPNAN * 4)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) /* Clear pending exception in 68882 idle frame */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) if (*(unsigned short *) fpstate == 0x1f38)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) fpstate[0x38] |= 1 << 3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) if (CPU_IS_COLDFIRE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) __asm__ volatile ("fmovemd %%fp0-%%fp7,%0\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) "fmovel %%fpcr,%1\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) "fmovel %%fpsr,%2\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) "fmovel %%fpiar,%3"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) : "=m" (fpregs.f_fpregs[0]),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) "=m" (fpregs.f_fpcntl[0]),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) "=m" (fpregs.f_fpcntl[1]),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) "=m" (fpregs.f_fpcntl[2])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) : /* no inputs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) : "memory");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) __asm__ volatile (".chip 68k/68881\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) "fmovemx %%fp0-%%fp7,%0\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) "fmoveml %%fpcr/%%fpsr/%%fpiar,%1\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) ".chip 68k"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) : "=m" (*fpregs.f_fpregs),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) "=m" (*fpregs.f_fpcntl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) : /* no inputs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) : "memory");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) err |= copy_to_user(&uc->uc_mcontext.fpregs, &fpregs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) sizeof(fpregs));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) if (context_size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) err |= copy_to_user((long __user *)&uc->uc_fpstate + 1, fpstate + 4,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) context_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) #else /* CONFIG_FPU */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) * For the case with no FPU configured these all do nothing.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) static inline int restore_fpu_state(struct sigcontext *sc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) static inline int rt_restore_fpu_state(struct ucontext __user *uc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) static inline void save_fpu_state(struct sigcontext *sc, struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) static inline int rt_save_fpu_state(struct ucontext __user *uc, struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) #endif /* CONFIG_FPU */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) static inline void siginfo_build_tests(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) * This needs to be tested on m68k as it has a lesser
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) * alignment requirement than x86 and that can cause surprises.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) /* This is part of the ABI and can never change in size: */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) BUILD_BUG_ON(sizeof(siginfo_t) != 128);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) /* Ensure the known fields never change in location */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) BUILD_BUG_ON(offsetof(siginfo_t, si_signo) != 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) BUILD_BUG_ON(offsetof(siginfo_t, si_errno) != 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) BUILD_BUG_ON(offsetof(siginfo_t, si_code) != 8);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) /* _kill */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) BUILD_BUG_ON(offsetof(siginfo_t, si_pid) != 0x0c);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) BUILD_BUG_ON(offsetof(siginfo_t, si_uid) != 0x10);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) /* _timer */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) BUILD_BUG_ON(offsetof(siginfo_t, si_tid) != 0x0c);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) BUILD_BUG_ON(offsetof(siginfo_t, si_overrun) != 0x10);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) BUILD_BUG_ON(offsetof(siginfo_t, si_value) != 0x14);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) /* _rt */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) BUILD_BUG_ON(offsetof(siginfo_t, si_pid) != 0x0c);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) BUILD_BUG_ON(offsetof(siginfo_t, si_uid) != 0x10);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) BUILD_BUG_ON(offsetof(siginfo_t, si_value) != 0x14);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) /* _sigchld */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) BUILD_BUG_ON(offsetof(siginfo_t, si_pid) != 0x0c);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) BUILD_BUG_ON(offsetof(siginfo_t, si_uid) != 0x10);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) BUILD_BUG_ON(offsetof(siginfo_t, si_status) != 0x14);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) BUILD_BUG_ON(offsetof(siginfo_t, si_utime) != 0x18);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) BUILD_BUG_ON(offsetof(siginfo_t, si_stime) != 0x1c);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) /* _sigfault */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) BUILD_BUG_ON(offsetof(siginfo_t, si_addr) != 0x0c);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) /* _sigfault._mcerr */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) BUILD_BUG_ON(offsetof(siginfo_t, si_addr_lsb) != 0x10);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) /* _sigfault._addr_bnd */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) BUILD_BUG_ON(offsetof(siginfo_t, si_lower) != 0x12);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) BUILD_BUG_ON(offsetof(siginfo_t, si_upper) != 0x16);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) /* _sigfault._addr_pkey */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) BUILD_BUG_ON(offsetof(siginfo_t, si_pkey) != 0x12);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) /* _sigpoll */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) BUILD_BUG_ON(offsetof(siginfo_t, si_band) != 0x0c);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) BUILD_BUG_ON(offsetof(siginfo_t, si_fd) != 0x10);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629) /* _sigsys */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) BUILD_BUG_ON(offsetof(siginfo_t, si_call_addr) != 0x0c);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) BUILD_BUG_ON(offsetof(siginfo_t, si_syscall) != 0x10);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) BUILD_BUG_ON(offsetof(siginfo_t, si_arch) != 0x14);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) /* any new si_fields should be added here */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637) static int mangle_kernel_stack(struct pt_regs *regs, int formatvec,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) void __user *fp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640) int fsize = frame_extra_sizes(formatvec >> 12);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641) if (fsize < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643) * user process trying to return with weird frame format
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) pr_debug("user process returning with weird frame format\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) if (!fsize) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649) regs->format = formatvec >> 12;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650) regs->vector = formatvec & 0xfff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) struct switch_stack *sw = (struct switch_stack *)regs - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) /* yes, twice as much as max(sizeof(frame.un.fmt<x>)) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654) unsigned long buf[sizeof_field(struct frame, un) / 2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656) /* that'll make sure that expansion won't crap over data */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657) if (copy_from_user(buf + fsize / 4, fp, fsize))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660) /* point of no return */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) regs->format = formatvec >> 12;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662) regs->vector = formatvec & 0xfff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663) #define frame_offset (sizeof(struct pt_regs)+sizeof(struct switch_stack))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664) __asm__ __volatile__ (
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665) #ifdef CONFIG_COLDFIRE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666) " movel %0,%/sp\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667) " bra ret_from_signal\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669) " movel %0,%/a0\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670) " subl %1,%/a0\n\t" /* make room on stack */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671) " movel %/a0,%/sp\n\t" /* set stack pointer */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672) /* move switch_stack and pt_regs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673) "1: movel %0@+,%/a0@+\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674) " dbra %2,1b\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675) " lea %/sp@(%c3),%/a0\n\t" /* add offset of fmt */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676) " lsrl #2,%1\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677) " subql #1,%1\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678) /* copy to the gap we'd made */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679) "2: movel %4@+,%/a0@+\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680) " dbra %1,2b\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681) " bral ret_from_signal\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683) : /* no outputs, it doesn't ever return */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684) : "a" (sw), "d" (fsize), "d" (frame_offset/4-1),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685) "n" (frame_offset), "a" (buf + fsize/4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) : "a0");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687) #undef frame_offset
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692) static inline int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693) restore_sigcontext(struct pt_regs *regs, struct sigcontext __user *usc, void __user *fp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695) int formatvec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696) struct sigcontext context;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697) int err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699) siginfo_build_tests();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701) /* Always make any pending restarted system calls return -EINTR */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702) current->restart_block.fn = do_no_restart_syscall;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704) /* get previous context */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705) if (copy_from_user(&context, usc, sizeof(context)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) goto badframe;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708) /* restore passed registers */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709) regs->d0 = context.sc_d0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710) regs->d1 = context.sc_d1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711) regs->a0 = context.sc_a0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712) regs->a1 = context.sc_a1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713) regs->sr = (regs->sr & 0xff00) | (context.sc_sr & 0xff);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714) regs->pc = context.sc_pc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715) regs->orig_d0 = -1; /* disable syscall checks */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716) wrusp(context.sc_usp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717) formatvec = context.sc_formatvec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719) err = restore_fpu_state(&context);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721) if (err || mangle_kernel_stack(regs, formatvec, fp))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722) goto badframe;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 723)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 724) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 725)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 726) badframe:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 727) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 728) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 729)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 730) static inline int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 731) rt_restore_ucontext(struct pt_regs *regs, struct switch_stack *sw,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 732) struct ucontext __user *uc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 733) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 734) int temp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 735) greg_t __user *gregs = uc->uc_mcontext.gregs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 736) unsigned long usp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 737) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 738)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 739) /* Always make any pending restarted system calls return -EINTR */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 740) current->restart_block.fn = do_no_restart_syscall;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 741)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 742) err = __get_user(temp, &uc->uc_mcontext.version);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 743) if (temp != MCONTEXT_VERSION)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 744) goto badframe;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 745) /* restore passed registers */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 746) err |= __get_user(regs->d0, &gregs[0]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 747) err |= __get_user(regs->d1, &gregs[1]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 748) err |= __get_user(regs->d2, &gregs[2]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 749) err |= __get_user(regs->d3, &gregs[3]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 750) err |= __get_user(regs->d4, &gregs[4]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 751) err |= __get_user(regs->d5, &gregs[5]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 752) err |= __get_user(sw->d6, &gregs[6]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 753) err |= __get_user(sw->d7, &gregs[7]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 754) err |= __get_user(regs->a0, &gregs[8]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 755) err |= __get_user(regs->a1, &gregs[9]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 756) err |= __get_user(regs->a2, &gregs[10]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 757) err |= __get_user(sw->a3, &gregs[11]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 758) err |= __get_user(sw->a4, &gregs[12]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 759) err |= __get_user(sw->a5, &gregs[13]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 760) err |= __get_user(sw->a6, &gregs[14]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 761) err |= __get_user(usp, &gregs[15]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 762) wrusp(usp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 763) err |= __get_user(regs->pc, &gregs[16]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 764) err |= __get_user(temp, &gregs[17]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 765) regs->sr = (regs->sr & 0xff00) | (temp & 0xff);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 766) regs->orig_d0 = -1; /* disable syscall checks */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 767) err |= __get_user(temp, &uc->uc_formatvec);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 768)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 769) err |= rt_restore_fpu_state(uc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 770) err |= restore_altstack(&uc->uc_stack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 771)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 772) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 773) goto badframe;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 774)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 775) if (mangle_kernel_stack(regs, temp, &uc->uc_extra))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 776) goto badframe;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 777)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 778) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 779)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 780) badframe:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 781) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 782) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 783)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 784) asmlinkage int do_sigreturn(struct pt_regs *regs, struct switch_stack *sw)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 785) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 786) unsigned long usp = rdusp();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 787) struct sigframe __user *frame = (struct sigframe __user *)(usp - 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 788) sigset_t set;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 789)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 790) if (!access_ok(frame, sizeof(*frame)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 791) goto badframe;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 792) if (__get_user(set.sig[0], &frame->sc.sc_mask) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 793) (_NSIG_WORDS > 1 &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 794) __copy_from_user(&set.sig[1], &frame->extramask,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 795) sizeof(frame->extramask))))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 796) goto badframe;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 797)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 798) set_current_blocked(&set);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 799)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 800) if (restore_sigcontext(regs, &frame->sc, frame + 1))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 801) goto badframe;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 802) return regs->d0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 803)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 804) badframe:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 805) force_sig(SIGSEGV);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 806) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 807) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 808)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 809) asmlinkage int do_rt_sigreturn(struct pt_regs *regs, struct switch_stack *sw)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 810) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 811) unsigned long usp = rdusp();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 812) struct rt_sigframe __user *frame = (struct rt_sigframe __user *)(usp - 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 813) sigset_t set;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 814)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 815) if (!access_ok(frame, sizeof(*frame)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 816) goto badframe;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 817) if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 818) goto badframe;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 819)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 820) set_current_blocked(&set);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 821)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 822) if (rt_restore_ucontext(regs, sw, &frame->uc))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 823) goto badframe;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 824) return regs->d0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 825)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 826) badframe:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 827) force_sig(SIGSEGV);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 828) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 829) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 830)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 831) static inline struct pt_regs *rte_regs(struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 832) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 833) return (void *)regs + regs->stkadj;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 834) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 835)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 836) static void setup_sigcontext(struct sigcontext *sc, struct pt_regs *regs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 837) unsigned long mask)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 838) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 839) struct pt_regs *tregs = rte_regs(regs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 840) sc->sc_mask = mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 841) sc->sc_usp = rdusp();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 842) sc->sc_d0 = regs->d0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 843) sc->sc_d1 = regs->d1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 844) sc->sc_a0 = regs->a0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 845) sc->sc_a1 = regs->a1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 846) sc->sc_sr = tregs->sr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 847) sc->sc_pc = tregs->pc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 848) sc->sc_formatvec = tregs->format << 12 | tregs->vector;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 849) save_a5_state(sc, regs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 850) save_fpu_state(sc, regs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 851) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 852)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 853) static inline int rt_setup_ucontext(struct ucontext __user *uc, struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 854) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 855) struct switch_stack *sw = (struct switch_stack *)regs - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 856) struct pt_regs *tregs = rte_regs(regs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 857) greg_t __user *gregs = uc->uc_mcontext.gregs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 858) int err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 859)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 860) err |= __put_user(MCONTEXT_VERSION, &uc->uc_mcontext.version);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 861) err |= __put_user(regs->d0, &gregs[0]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 862) err |= __put_user(regs->d1, &gregs[1]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 863) err |= __put_user(regs->d2, &gregs[2]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 864) err |= __put_user(regs->d3, &gregs[3]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 865) err |= __put_user(regs->d4, &gregs[4]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 866) err |= __put_user(regs->d5, &gregs[5]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 867) err |= __put_user(sw->d6, &gregs[6]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 868) err |= __put_user(sw->d7, &gregs[7]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 869) err |= __put_user(regs->a0, &gregs[8]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 870) err |= __put_user(regs->a1, &gregs[9]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 871) err |= __put_user(regs->a2, &gregs[10]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 872) err |= __put_user(sw->a3, &gregs[11]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 873) err |= __put_user(sw->a4, &gregs[12]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 874) err |= __put_user(sw->a5, &gregs[13]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 875) err |= __put_user(sw->a6, &gregs[14]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 876) err |= __put_user(rdusp(), &gregs[15]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 877) err |= __put_user(tregs->pc, &gregs[16]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 878) err |= __put_user(tregs->sr, &gregs[17]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 879) err |= __put_user((tregs->format << 12) | tregs->vector, &uc->uc_formatvec);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 880) err |= rt_save_fpu_state(uc, regs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 881) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 882) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 883)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 884) static inline void __user *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 885) get_sigframe(struct ksignal *ksig, size_t frame_size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 886) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 887) unsigned long usp = sigsp(rdusp(), ksig);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 888)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 889) return (void __user *)((usp - frame_size) & -8UL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 890) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 891)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 892) static int setup_frame(struct ksignal *ksig, sigset_t *set,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 893) struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 894) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 895) struct sigframe __user *frame;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 896) struct pt_regs *tregs = rte_regs(regs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 897) int fsize = frame_extra_sizes(tregs->format);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 898) struct sigcontext context;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 899) int err = 0, sig = ksig->sig;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 900)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 901) if (fsize < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 902) pr_debug("setup_frame: Unknown frame format %#x\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 903) tregs->format);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 904) return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 905) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 906)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 907) frame = get_sigframe(ksig, sizeof(*frame) + fsize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 908)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 909) if (fsize)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 910) err |= copy_to_user (frame + 1, regs + 1, fsize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 911)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 912) err |= __put_user(sig, &frame->sig);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 913)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 914) err |= __put_user(tregs->vector, &frame->code);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 915) err |= __put_user(&frame->sc, &frame->psc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 916)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 917) if (_NSIG_WORDS > 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 918) err |= copy_to_user(frame->extramask, &set->sig[1],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 919) sizeof(frame->extramask));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 920)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 921) setup_sigcontext(&context, regs, set->sig[0]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 922) err |= copy_to_user (&frame->sc, &context, sizeof(context));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 923)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 924) /* Set up to return from userspace. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 925) #ifdef CONFIG_MMU
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 926) err |= __put_user(frame->retcode, &frame->pretcode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 927) /* moveq #,d0; trap #0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 928) err |= __put_user(0x70004e40 + (__NR_sigreturn << 16),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 929) (long __user *)(frame->retcode));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 930) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 931) err |= __put_user((long) ret_from_user_signal,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 932) (long __user *) &frame->pretcode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 933) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 934)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 935) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 936) return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 937)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 938) push_cache ((unsigned long) &frame->retcode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 939)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 940) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 941) * This is subtle; if we build more than one sigframe, all but the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 942) * first one will see frame format 0 and have fsize == 0, so we won't
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 943) * screw stkadj.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 944) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 945) if (fsize) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 946) regs->stkadj = fsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 947) tregs = rte_regs(regs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 948) pr_debug("Performing stackadjust=%04lx\n", regs->stkadj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 949) tregs->vector = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 950) tregs->format = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 951) tregs->sr = regs->sr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 952) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 953)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 954) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 955) * Set up registers for signal handler. All the state we are about
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 956) * to destroy is successfully copied to sigframe.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 957) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 958) wrusp ((unsigned long) frame);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 959) tregs->pc = (unsigned long) ksig->ka.sa.sa_handler;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 960) adjustformat(regs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 961)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 962) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 963) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 964)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 965) static int setup_rt_frame(struct ksignal *ksig, sigset_t *set,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 966) struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 967) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 968) struct rt_sigframe __user *frame;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 969) struct pt_regs *tregs = rte_regs(regs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 970) int fsize = frame_extra_sizes(tregs->format);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 971) int err = 0, sig = ksig->sig;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 972)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 973) if (fsize < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 974) pr_debug("setup_frame: Unknown frame format %#x\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 975) regs->format);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 976) return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 977) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 978)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 979) frame = get_sigframe(ksig, sizeof(*frame));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 980)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 981) if (fsize)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 982) err |= copy_to_user (&frame->uc.uc_extra, regs + 1, fsize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 983)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 984) err |= __put_user(sig, &frame->sig);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 985) err |= __put_user(&frame->info, &frame->pinfo);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 986) err |= __put_user(&frame->uc, &frame->puc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 987) err |= copy_siginfo_to_user(&frame->info, &ksig->info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 988)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 989) /* Create the ucontext. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 990) err |= __put_user(0, &frame->uc.uc_flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 991) err |= __put_user(NULL, &frame->uc.uc_link);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 992) err |= __save_altstack(&frame->uc.uc_stack, rdusp());
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 993) err |= rt_setup_ucontext(&frame->uc, regs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 994) err |= copy_to_user (&frame->uc.uc_sigmask, set, sizeof(*set));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 995)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 996) /* Set up to return from userspace. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 997) #ifdef CONFIG_MMU
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 998) err |= __put_user(frame->retcode, &frame->pretcode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 999) #ifdef __mcoldfire__
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1000) /* movel #__NR_rt_sigreturn,d0; trap #0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1001) err |= __put_user(0x203c0000, (long __user *)(frame->retcode + 0));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1002) err |= __put_user(0x00004e40 + (__NR_rt_sigreturn << 16),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1003) (long __user *)(frame->retcode + 4));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1004) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1005) /* moveq #,d0; notb d0; trap #0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1006) err |= __put_user(0x70004600 + ((__NR_rt_sigreturn ^ 0xff) << 16),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1007) (long __user *)(frame->retcode + 0));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1008) err |= __put_user(0x4e40, (short __user *)(frame->retcode + 4));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1009) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1010) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1011) err |= __put_user((long) ret_from_user_rt_signal,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1012) (long __user *) &frame->pretcode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1013) #endif /* CONFIG_MMU */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1014)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1015) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1016) return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1017)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1018) push_cache ((unsigned long) &frame->retcode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1019)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1020) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1021) * This is subtle; if we build more than one sigframe, all but the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1022) * first one will see frame format 0 and have fsize == 0, so we won't
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1023) * screw stkadj.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1024) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1025) if (fsize) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1026) regs->stkadj = fsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1027) tregs = rte_regs(regs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1028) pr_debug("Performing stackadjust=%04lx\n", regs->stkadj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1029) tregs->vector = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1030) tregs->format = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1031) tregs->sr = regs->sr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1032) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1033)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1034) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1035) * Set up registers for signal handler. All the state we are about
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1036) * to destroy is successfully copied to sigframe.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1037) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1038) wrusp ((unsigned long) frame);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1039) tregs->pc = (unsigned long) ksig->ka.sa.sa_handler;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1040) adjustformat(regs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1041) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1042) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1043)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1044) static inline void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1045) handle_restart(struct pt_regs *regs, struct k_sigaction *ka, int has_handler)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1046) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1047) switch (regs->d0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1048) case -ERESTARTNOHAND:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1049) if (!has_handler)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1050) goto do_restart;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1051) regs->d0 = -EINTR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1052) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1053)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1054) case -ERESTART_RESTARTBLOCK:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1055) if (!has_handler) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1056) regs->d0 = __NR_restart_syscall;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1057) regs->pc -= 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1058) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1059) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1060) regs->d0 = -EINTR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1061) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1062)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1063) case -ERESTARTSYS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1064) if (has_handler && !(ka->sa.sa_flags & SA_RESTART)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1065) regs->d0 = -EINTR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1066) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1067) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1068) fallthrough;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1069) case -ERESTARTNOINTR:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1070) do_restart:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1071) regs->d0 = regs->orig_d0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1072) regs->pc -= 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1073) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1074) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1075) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1076)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1077) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1078) * OK, we're invoking a handler
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1079) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1080) static void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1081) handle_signal(struct ksignal *ksig, struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1082) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1083) sigset_t *oldset = sigmask_to_save();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1084) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1085) /* are we from a system call? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1086) if (regs->orig_d0 >= 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1087) /* If so, check system call restarting.. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1088) handle_restart(regs, &ksig->ka, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1089)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1090) /* set up the stack frame */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1091) if (ksig->ka.sa.sa_flags & SA_SIGINFO)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1092) err = setup_rt_frame(ksig, oldset, regs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1093) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1094) err = setup_frame(ksig, oldset, regs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1095)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1096) signal_setup_done(err, ksig, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1097)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1098) if (test_thread_flag(TIF_DELAYED_TRACE)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1099) regs->sr &= ~0x8000;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1100) send_sig(SIGTRAP, current, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1101) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1102) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1103)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1104) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1105) * Note that 'init' is a special process: it doesn't get signals it doesn't
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1106) * want to handle. Thus you cannot kill init even with a SIGKILL even by
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1107) * mistake.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1108) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1109) static void do_signal(struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1110) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1111) struct ksignal ksig;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1113) current->thread.esp0 = (unsigned long) regs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1114)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1115) if (get_signal(&ksig)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1116) /* Whee! Actually deliver the signal. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1117) handle_signal(&ksig, regs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1118) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1119) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1120)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1121) /* Did we come from a system call? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1122) if (regs->orig_d0 >= 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1123) /* Restart the system call - no handlers present */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1124) handle_restart(regs, NULL, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1125)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1126) /* If there's no signal to deliver, we just restore the saved mask. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1127) restore_saved_sigmask();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1128) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1129)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1130) void do_notify_resume(struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1131) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1132) if (test_thread_flag(TIF_SIGPENDING))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1133) do_signal(regs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1134)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1135) if (test_thread_flag(TIF_NOTIFY_RESUME))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1136) tracehook_notify_resume(regs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1137) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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