97870c34b4532 arch/um/os-Linux/skas/mem.c (Alex Dewar 2019-08-25 10:49:18 +0100 1) // SPDX-License-Identifier: GPL-2.0
f45d9fc9d8067 arch/um/os-Linux/skas/mem.c (Gennady Sharapov 2006-01-18 17:42:45 -0800 2) /*
ba180fd437156 arch/um/os-Linux/skas/mem.c (Jeff Dike 2007-10-16 01:27:00 -0700 3) * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
^1da177e4c3f4 arch/um/kernel/skas/mem_user.c (Linus Torvalds 2005-04-16 15:20:36 -0700 4) */
^1da177e4c3f4 arch/um/kernel/skas/mem_user.c (Linus Torvalds 2005-04-16 15:20:36 -0700 5)
ba180fd437156 arch/um/os-Linux/skas/mem.c (Jeff Dike 2007-10-16 01:27:00 -0700 6) #include <stddef.h>
ba180fd437156 arch/um/os-Linux/skas/mem.c (Jeff Dike 2007-10-16 01:27:00 -0700 7) #include <unistd.h>
^1da177e4c3f4 arch/um/kernel/skas/mem_user.c (Linus Torvalds 2005-04-16 15:20:36 -0700 8) #include <errno.h>
07bf731e4b95d arch/um/kernel/skas/mem_user.c (Bodo Stroesser 2005-09-03 15:57:50 -0700 9) #include <string.h>
^1da177e4c3f4 arch/um/kernel/skas/mem_user.c (Linus Torvalds 2005-04-16 15:20:36 -0700 10) #include <sys/mman.h>
37185b3324087 arch/um/os-Linux/skas/mem.c (Al Viro 2012-10-08 03:27:32 +0100 11) #include <init.h>
37185b3324087 arch/um/os-Linux/skas/mem.c (Al Viro 2012-10-08 03:27:32 +0100 12) #include <as-layout.h>
37185b3324087 arch/um/os-Linux/skas/mem.c (Al Viro 2012-10-08 03:27:32 +0100 13) #include <mm_id.h>
37185b3324087 arch/um/os-Linux/skas/mem.c (Al Viro 2012-10-08 03:27:32 +0100 14) #include <os.h>
37185b3324087 arch/um/os-Linux/skas/mem.c (Al Viro 2012-10-08 03:27:32 +0100 15) #include <ptrace_user.h>
37185b3324087 arch/um/os-Linux/skas/mem.c (Al Viro 2012-10-08 03:27:32 +0100 16) #include <registers.h>
37185b3324087 arch/um/os-Linux/skas/mem.c (Al Viro 2012-10-08 03:27:32 +0100 17) #include <skas.h>
37185b3324087 arch/um/os-Linux/skas/mem.c (Al Viro 2012-10-08 03:27:32 +0100 18) #include <sysdep/ptrace.h>
37185b3324087 arch/um/os-Linux/skas/mem.c (Al Viro 2012-10-08 03:27:32 +0100 19) #include <sysdep/stub.h>
d67b569f5f620 arch/um/kernel/skas/mem_user.c (Jeff Dike 2005-07-07 17:56:49 -0700 20)
5f32943b5e9a4 arch/um/os-Linux/skas/mem.c (Nicolas Iooss 2014-10-12 13:02:13 +0200 21) extern char batch_syscall_stub[], __syscall_stub_start[];
d67b569f5f620 arch/um/kernel/skas/mem_user.c (Jeff Dike 2005-07-07 17:56:49 -0700 22)
16dd07bc6404c arch/um/os-Linux/skas/mem.c (Jeff Dike 2007-05-06 14:51:48 -0700 23) extern void wait_stub_done(int pid);
d67b569f5f620 arch/um/kernel/skas/mem_user.c (Jeff Dike 2005-07-07 17:56:49 -0700 24)
07bf731e4b95d arch/um/kernel/skas/mem_user.c (Bodo Stroesser 2005-09-03 15:57:50 -0700 25) static inline unsigned long *check_init_stack(struct mm_id * mm_idp,
07bf731e4b95d arch/um/kernel/skas/mem_user.c (Bodo Stroesser 2005-09-03 15:57:50 -0700 26) unsigned long *stack)
07bf731e4b95d arch/um/kernel/skas/mem_user.c (Bodo Stroesser 2005-09-03 15:57:50 -0700 27) {
ba180fd437156 arch/um/os-Linux/skas/mem.c (Jeff Dike 2007-10-16 01:27:00 -0700 28) if (stack == NULL) {
07bf731e4b95d arch/um/kernel/skas/mem_user.c (Bodo Stroesser 2005-09-03 15:57:50 -0700 29) stack = (unsigned long *) mm_idp->stack + 2;
07bf731e4b95d arch/um/kernel/skas/mem_user.c (Bodo Stroesser 2005-09-03 15:57:50 -0700 30) *stack = 0;
07bf731e4b95d arch/um/kernel/skas/mem_user.c (Bodo Stroesser 2005-09-03 15:57:50 -0700 31) }
07bf731e4b95d arch/um/kernel/skas/mem_user.c (Bodo Stroesser 2005-09-03 15:57:50 -0700 32) return stack;
07bf731e4b95d arch/um/kernel/skas/mem_user.c (Bodo Stroesser 2005-09-03 15:57:50 -0700 33) }
07bf731e4b95d arch/um/kernel/skas/mem_user.c (Bodo Stroesser 2005-09-03 15:57:50 -0700 34)
16dd07bc6404c arch/um/os-Linux/skas/mem.c (Jeff Dike 2007-05-06 14:51:48 -0700 35) static unsigned long syscall_regs[MAX_REG_NR];
16dd07bc6404c arch/um/os-Linux/skas/mem.c (Jeff Dike 2007-05-06 14:51:48 -0700 36)
16dd07bc6404c arch/um/os-Linux/skas/mem.c (Jeff Dike 2007-05-06 14:51:48 -0700 37) static int __init init_syscall_regs(void)
16dd07bc6404c arch/um/os-Linux/skas/mem.c (Jeff Dike 2007-05-06 14:51:48 -0700 38) {
fbfe9c847edf5 arch/um/os-Linux/skas/mem.c (Ingo van Lil 2011-09-14 16:21:23 -0700 39) get_safe_registers(syscall_regs, NULL);
54ae36f24b103 arch/um/os-Linux/skas/mem.c (Jeff Dike 2007-10-16 01:27:33 -0700 40) syscall_regs[REGS_IP_INDEX] = STUB_CODE +
5f32943b5e9a4 arch/um/os-Linux/skas/mem.c (Nicolas Iooss 2014-10-12 13:02:13 +0200 41) ((unsigned long) batch_syscall_stub -
5f32943b5e9a4 arch/um/os-Linux/skas/mem.c (Nicolas Iooss 2014-10-12 13:02:13 +0200 42) (unsigned long) __syscall_stub_start);
9f0b4807a44ff arch/um/os-Linux/skas/mem.c (Johannes Berg 2021-01-13 22:09:43 +0100 43) syscall_regs[REGS_SP_INDEX] = STUB_DATA;
9f0b4807a44ff arch/um/os-Linux/skas/mem.c (Johannes Berg 2021-01-13 22:09:43 +0100 44)
16dd07bc6404c arch/um/os-Linux/skas/mem.c (Jeff Dike 2007-05-06 14:51:48 -0700 45) return 0;
16dd07bc6404c arch/um/os-Linux/skas/mem.c (Jeff Dike 2007-05-06 14:51:48 -0700 46) }
16dd07bc6404c arch/um/os-Linux/skas/mem.c (Jeff Dike 2007-05-06 14:51:48 -0700 47)
16dd07bc6404c arch/um/os-Linux/skas/mem.c (Jeff Dike 2007-05-06 14:51:48 -0700 48) __initcall(init_syscall_regs);
16dd07bc6404c arch/um/os-Linux/skas/mem.c (Jeff Dike 2007-05-06 14:51:48 -0700 49)
f45d9fc9d8067 arch/um/os-Linux/skas/mem.c (Gennady Sharapov 2006-01-18 17:42:45 -0800 50) static inline long do_syscall_stub(struct mm_id * mm_idp, void **addr)
^1da177e4c3f4 arch/um/kernel/skas/mem_user.c (Linus Torvalds 2005-04-16 15:20:36 -0700 51) {
b92c4f922b2e8 arch/um/os-Linux/skas/mem.c (Jeff Dike 2007-03-26 21:32:25 -0800 52) int n, i;
07bf731e4b95d arch/um/kernel/skas/mem_user.c (Bodo Stroesser 2005-09-03 15:57:50 -0700 53) long ret, offset;
f45d9fc9d8067 arch/um/os-Linux/skas/mem.c (Gennady Sharapov 2006-01-18 17:42:45 -0800 54) unsigned long * data;
f45d9fc9d8067 arch/um/os-Linux/skas/mem.c (Gennady Sharapov 2006-01-18 17:42:45 -0800 55) unsigned long * syscall;
16dd07bc6404c arch/um/os-Linux/skas/mem.c (Jeff Dike 2007-05-06 14:51:48 -0700 56) int err, pid = mm_idp->u.pid;
07bf731e4b95d arch/um/kernel/skas/mem_user.c (Bodo Stroesser 2005-09-03 15:57:50 -0700 57)
16dd07bc6404c arch/um/os-Linux/skas/mem.c (Jeff Dike 2007-05-06 14:51:48 -0700 58) n = ptrace_setregs(pid, syscall_regs);
ba180fd437156 arch/um/os-Linux/skas/mem.c (Jeff Dike 2007-10-16 01:27:00 -0700 59) if (n < 0) {
ba180fd437156 arch/um/os-Linux/skas/mem.c (Jeff Dike 2007-10-16 01:27:00 -0700 60) printk(UM_KERN_ERR "Registers - \n");
ba180fd437156 arch/um/os-Linux/skas/mem.c (Jeff Dike 2007-10-16 01:27:00 -0700 61) for (i = 0; i < MAX_REG_NR; i++)
ba180fd437156 arch/um/os-Linux/skas/mem.c (Jeff Dike 2007-10-16 01:27:00 -0700 62) printk(UM_KERN_ERR "\t%d\t0x%lx\n", i, syscall_regs[i]);
07bf731e4b95d arch/um/kernel/skas/mem_user.c (Bodo Stroesser 2005-09-03 15:57:50 -0700 63) panic("do_syscall_stub : PTRACE_SETREGS failed, errno = %d\n",
b92c4f922b2e8 arch/um/os-Linux/skas/mem.c (Jeff Dike 2007-03-26 21:32:25 -0800 64) -n);
b92c4f922b2e8 arch/um/os-Linux/skas/mem.c (Jeff Dike 2007-03-26 21:32:25 -0800 65) }
07bf731e4b95d arch/um/kernel/skas/mem_user.c (Bodo Stroesser 2005-09-03 15:57:50 -0700 66)
16dd07bc6404c arch/um/os-Linux/skas/mem.c (Jeff Dike 2007-05-06 14:51:48 -0700 67) err = ptrace(PTRACE_CONT, pid, 0, 0);
ba180fd437156 arch/um/os-Linux/skas/mem.c (Jeff Dike 2007-10-16 01:27:00 -0700 68) if (err)
16dd07bc6404c arch/um/os-Linux/skas/mem.c (Jeff Dike 2007-05-06 14:51:48 -0700 69) panic("Failed to continue stub, pid = %d, errno = %d\n", pid,
16dd07bc6404c arch/um/os-Linux/skas/mem.c (Jeff Dike 2007-05-06 14:51:48 -0700 70) errno);
16dd07bc6404c arch/um/os-Linux/skas/mem.c (Jeff Dike 2007-05-06 14:51:48 -0700 71)
16dd07bc6404c arch/um/os-Linux/skas/mem.c (Jeff Dike 2007-05-06 14:51:48 -0700 72) wait_stub_done(pid);
07bf731e4b95d arch/um/kernel/skas/mem_user.c (Bodo Stroesser 2005-09-03 15:57:50 -0700 73)
ba180fd437156 arch/um/os-Linux/skas/mem.c (Jeff Dike 2007-10-16 01:27:00 -0700 74) /*
ba180fd437156 arch/um/os-Linux/skas/mem.c (Jeff Dike 2007-10-16 01:27:00 -0700 75) * When the stub stops, we find the following values on the
07bf731e4b95d arch/um/kernel/skas/mem_user.c (Bodo Stroesser 2005-09-03 15:57:50 -0700 76) * beginning of the stack:
07bf731e4b95d arch/um/kernel/skas/mem_user.c (Bodo Stroesser 2005-09-03 15:57:50 -0700 77) * (long )return_value
07bf731e4b95d arch/um/kernel/skas/mem_user.c (Bodo Stroesser 2005-09-03 15:57:50 -0700 78) * (long )offset to failed sycall-data (0, if no error)
07bf731e4b95d arch/um/kernel/skas/mem_user.c (Bodo Stroesser 2005-09-03 15:57:50 -0700 79) */
07bf731e4b95d arch/um/kernel/skas/mem_user.c (Bodo Stroesser 2005-09-03 15:57:50 -0700 80) ret = *((unsigned long *) mm_idp->stack);
07bf731e4b95d arch/um/kernel/skas/mem_user.c (Bodo Stroesser 2005-09-03 15:57:50 -0700 81) offset = *((unsigned long *) mm_idp->stack + 1);
07bf731e4b95d arch/um/kernel/skas/mem_user.c (Bodo Stroesser 2005-09-03 15:57:50 -0700 82) if (offset) {
54ae36f24b103 arch/um/os-Linux/skas/mem.c (Jeff Dike 2007-10-16 01:27:33 -0700 83) data = (unsigned long *)(mm_idp->stack + offset - STUB_DATA);
ba180fd437156 arch/um/os-Linux/skas/mem.c (Jeff Dike 2007-10-16 01:27:00 -0700 84) printk(UM_KERN_ERR "do_syscall_stub : ret = %ld, offset = %ld, "
802e307795c9c arch/um/os-Linux/skas/mem.c (Paolo 'Blaisorblade' Giarrusso 2006-04-10 22:53:32 -0700 85) "data = %p\n", ret, offset, data);
07bf731e4b95d arch/um/kernel/skas/mem_user.c (Bodo Stroesser 2005-09-03 15:57:50 -0700 86) syscall = (unsigned long *)((unsigned long)data + data[0]);
ba180fd437156 arch/um/os-Linux/skas/mem.c (Jeff Dike 2007-10-16 01:27:00 -0700 87) printk(UM_KERN_ERR "do_syscall_stub: syscall %ld failed, "
ba180fd437156 arch/um/os-Linux/skas/mem.c (Jeff Dike 2007-10-16 01:27:00 -0700 88) "return value = 0x%lx, expected return value = 0x%lx\n",
07bf731e4b95d arch/um/kernel/skas/mem_user.c (Bodo Stroesser 2005-09-03 15:57:50 -0700 89) syscall[0], ret, syscall[7]);
ba180fd437156 arch/um/os-Linux/skas/mem.c (Jeff Dike 2007-10-16 01:27:00 -0700 90) printk(UM_KERN_ERR " syscall parameters: "
07bf731e4b95d arch/um/kernel/skas/mem_user.c (Bodo Stroesser 2005-09-03 15:57:50 -0700 91) "0x%lx 0x%lx 0x%lx 0x%lx 0x%lx 0x%lx\n",
07bf731e4b95d arch/um/kernel/skas/mem_user.c (Bodo Stroesser 2005-09-03 15:57:50 -0700 92) syscall[1], syscall[2], syscall[3],
07bf731e4b95d arch/um/kernel/skas/mem_user.c (Bodo Stroesser 2005-09-03 15:57:50 -0700 93) syscall[4], syscall[5], syscall[6]);
ba180fd437156 arch/um/os-Linux/skas/mem.c (Jeff Dike 2007-10-16 01:27:00 -0700 94) for (n = 1; n < data[0]/sizeof(long); n++) {
ba180fd437156 arch/um/os-Linux/skas/mem.c (Jeff Dike 2007-10-16 01:27:00 -0700 95) if (n == 1)
ba180fd437156 arch/um/os-Linux/skas/mem.c (Jeff Dike 2007-10-16 01:27:00 -0700 96) printk(UM_KERN_ERR " additional syscall "
ba180fd437156 arch/um/os-Linux/skas/mem.c (Jeff Dike 2007-10-16 01:27:00 -0700 97) "data:");
ba180fd437156 arch/um/os-Linux/skas/mem.c (Jeff Dike 2007-10-16 01:27:00 -0700 98) if (n % 4 == 1)
ba180fd437156 arch/um/os-Linux/skas/mem.c (Jeff Dike 2007-10-16 01:27:00 -0700 99) printk("\n" UM_KERN_ERR " ");
07bf731e4b95d arch/um/kernel/skas/mem_user.c (Bodo Stroesser 2005-09-03 15:57:50 -0700 100) printk(" 0x%lx", data[n]);
07bf731e4b95d arch/um/kernel/skas/mem_user.c (Bodo Stroesser 2005-09-03 15:57:50 -0700 101) }
ba180fd437156 arch/um/os-Linux/skas/mem.c (Jeff Dike 2007-10-16 01:27:00 -0700 102) if (n > 1)
07bf731e4b95d arch/um/kernel/skas/mem_user.c (Bodo Stroesser 2005-09-03 15:57:50 -0700 103) printk("\n");
c56004901fa5d arch/um/kernel/skas/mem_user.c (Jeff Dike 2005-09-03 15:57:36 -0700 104) }
07bf731e4b95d arch/um/kernel/skas/mem_user.c (Bodo Stroesser 2005-09-03 15:57:50 -0700 105) else ret = 0;
c56004901fa5d arch/um/kernel/skas/mem_user.c (Jeff Dike 2005-09-03 15:57:36 -0700 106)
07bf731e4b95d arch/um/kernel/skas/mem_user.c (Bodo Stroesser 2005-09-03 15:57:50 -0700 107) *addr = check_init_stack(mm_idp, NULL);
c56004901fa5d arch/um/kernel/skas/mem_user.c (Jeff Dike 2005-09-03 15:57:36 -0700 108)
07bf731e4b95d arch/um/kernel/skas/mem_user.c (Bodo Stroesser 2005-09-03 15:57:50 -0700 109) return ret;
c56004901fa5d arch/um/kernel/skas/mem_user.c (Jeff Dike 2005-09-03 15:57:36 -0700 110) }
c56004901fa5d arch/um/kernel/skas/mem_user.c (Jeff Dike 2005-09-03 15:57:36 -0700 111)
07bf731e4b95d arch/um/kernel/skas/mem_user.c (Bodo Stroesser 2005-09-03 15:57:50 -0700 112) long run_syscall_stub(struct mm_id * mm_idp, int syscall,
07bf731e4b95d arch/um/kernel/skas/mem_user.c (Bodo Stroesser 2005-09-03 15:57:50 -0700 113) unsigned long *args, long expected, void **addr,
f45d9fc9d8067 arch/um/os-Linux/skas/mem.c (Gennady Sharapov 2006-01-18 17:42:45 -0800 114) int done)
c56004901fa5d arch/um/kernel/skas/mem_user.c (Jeff Dike 2005-09-03 15:57:36 -0700 115) {
f45d9fc9d8067 arch/um/os-Linux/skas/mem.c (Gennady Sharapov 2006-01-18 17:42:45 -0800 116) unsigned long *stack = check_init_stack(mm_idp, *addr);
07bf731e4b95d arch/um/kernel/skas/mem_user.c (Bodo Stroesser 2005-09-03 15:57:50 -0700 117)
f45d9fc9d8067 arch/um/os-Linux/skas/mem.c (Gennady Sharapov 2006-01-18 17:42:45 -0800 118) *stack += sizeof(long);
07bf731e4b95d arch/um/kernel/skas/mem_user.c (Bodo Stroesser 2005-09-03 15:57:50 -0700 119) stack += *stack / sizeof(long);
c56004901fa5d arch/um/kernel/skas/mem_user.c (Jeff Dike 2005-09-03 15:57:36 -0700 120)
f45d9fc9d8067 arch/um/os-Linux/skas/mem.c (Gennady Sharapov 2006-01-18 17:42:45 -0800 121) *stack++ = syscall;
f45d9fc9d8067 arch/um/os-Linux/skas/mem.c (Gennady Sharapov 2006-01-18 17:42:45 -0800 122) *stack++ = args[0];
f45d9fc9d8067 arch/um/os-Linux/skas/mem.c (Gennady Sharapov 2006-01-18 17:42:45 -0800 123) *stack++ = args[1];
f45d9fc9d8067 arch/um/os-Linux/skas/mem.c (Gennady Sharapov 2006-01-18 17:42:45 -0800 124) *stack++ = args[2];
f45d9fc9d8067 arch/um/os-Linux/skas/mem.c (Gennady Sharapov 2006-01-18 17:42:45 -0800 125) *stack++ = args[3];
f45d9fc9d8067 arch/um/os-Linux/skas/mem.c (Gennady Sharapov 2006-01-18 17:42:45 -0800 126) *stack++ = args[4];
f45d9fc9d8067 arch/um/os-Linux/skas/mem.c (Gennady Sharapov 2006-01-18 17:42:45 -0800 127) *stack++ = args[5];
07bf731e4b95d arch/um/kernel/skas/mem_user.c (Bodo Stroesser 2005-09-03 15:57:50 -0700 128) *stack++ = expected;
f45d9fc9d8067 arch/um/os-Linux/skas/mem.c (Gennady Sharapov 2006-01-18 17:42:45 -0800 129) *stack = 0;
c56004901fa5d arch/um/kernel/skas/mem_user.c (Jeff Dike 2005-09-03 15:57:36 -0700 130)
ba180fd437156 arch/um/os-Linux/skas/mem.c (Jeff Dike 2007-10-16 01:27:00 -0700 131) if (!done && ((((unsigned long) stack) & ~UM_KERN_PAGE_MASK) <
ba180fd437156 arch/um/os-Linux/skas/mem.c (Jeff Dike 2007-10-16 01:27:00 -0700 132) UM_KERN_PAGE_SIZE - 10 * sizeof(long))) {
07bf731e4b95d arch/um/kernel/skas/mem_user.c (Bodo Stroesser 2005-09-03 15:57:50 -0700 133) *addr = stack;
f45d9fc9d8067 arch/um/os-Linux/skas/mem.c (Gennady Sharapov 2006-01-18 17:42:45 -0800 134) return 0;
f45d9fc9d8067 arch/um/os-Linux/skas/mem.c (Gennady Sharapov 2006-01-18 17:42:45 -0800 135) }
c56004901fa5d arch/um/kernel/skas/mem_user.c (Jeff Dike 2005-09-03 15:57:36 -0700 136)
07bf731e4b95d arch/um/kernel/skas/mem_user.c (Bodo Stroesser 2005-09-03 15:57:50 -0700 137) return do_syscall_stub(mm_idp, addr);
07bf731e4b95d arch/um/kernel/skas/mem_user.c (Bodo Stroesser 2005-09-03 15:57:50 -0700 138) }
c56004901fa5d arch/um/kernel/skas/mem_user.c (Jeff Dike 2005-09-03 15:57:36 -0700 139)
07bf731e4b95d arch/um/kernel/skas/mem_user.c (Bodo Stroesser 2005-09-03 15:57:50 -0700 140) long syscall_stub_data(struct mm_id * mm_idp,
07bf731e4b95d arch/um/kernel/skas/mem_user.c (Bodo Stroesser 2005-09-03 15:57:50 -0700 141) unsigned long *data, int data_count,
07bf731e4b95d arch/um/kernel/skas/mem_user.c (Bodo Stroesser 2005-09-03 15:57:50 -0700 142) void **addr, void **stub_addr)
07bf731e4b95d arch/um/kernel/skas/mem_user.c (Bodo Stroesser 2005-09-03 15:57:50 -0700 143) {
07bf731e4b95d arch/um/kernel/skas/mem_user.c (Bodo Stroesser 2005-09-03 15:57:50 -0700 144) unsigned long *stack;
07bf731e4b95d arch/um/kernel/skas/mem_user.c (Bodo Stroesser 2005-09-03 15:57:50 -0700 145) int ret = 0;
07bf731e4b95d arch/um/kernel/skas/mem_user.c (Bodo Stroesser 2005-09-03 15:57:50 -0700 146)
ba180fd437156 arch/um/os-Linux/skas/mem.c (Jeff Dike 2007-10-16 01:27:00 -0700 147) /*
ba180fd437156 arch/um/os-Linux/skas/mem.c (Jeff Dike 2007-10-16 01:27:00 -0700 148) * If *addr still is uninitialized, it *must* contain NULL.
07bf731e4b95d arch/um/kernel/skas/mem_user.c (Bodo Stroesser 2005-09-03 15:57:50 -0700 149) * Thus in this case do_syscall_stub correctly won't be called.
07bf731e4b95d arch/um/kernel/skas/mem_user.c (Bodo Stroesser 2005-09-03 15:57:50 -0700 150) */
ba180fd437156 arch/um/os-Linux/skas/mem.c (Jeff Dike 2007-10-16 01:27:00 -0700 151) if ((((unsigned long) *addr) & ~UM_KERN_PAGE_MASK) >=
c539ab73070b3 arch/um/os-Linux/skas/mem.c (Jeff Dike 2007-06-16 10:16:09 -0700 152) UM_KERN_PAGE_SIZE - (10 + data_count) * sizeof(long)) {
07bf731e4b95d arch/um/kernel/skas/mem_user.c (Bodo Stroesser 2005-09-03 15:57:50 -0700 153) ret = do_syscall_stub(mm_idp, addr);
f45d9fc9d8067 arch/um/os-Linux/skas/mem.c (Gennady Sharapov 2006-01-18 17:42:45 -0800 154) /* in case of error, don't overwrite data on stack */
ba180fd437156 arch/um/os-Linux/skas/mem.c (Jeff Dike 2007-10-16 01:27:00 -0700 155) if (ret)
07bf731e4b95d arch/um/kernel/skas/mem_user.c (Bodo Stroesser 2005-09-03 15:57:50 -0700 156) return ret;
07bf731e4b95d arch/um/kernel/skas/mem_user.c (Bodo Stroesser 2005-09-03 15:57:50 -0700 157) }
d67b569f5f620 arch/um/kernel/skas/mem_user.c (Jeff Dike 2005-07-07 17:56:49 -0700 158)
07bf731e4b95d arch/um/kernel/skas/mem_user.c (Bodo Stroesser 2005-09-03 15:57:50 -0700 159) stack = check_init_stack(mm_idp, *addr);
07bf731e4b95d arch/um/kernel/skas/mem_user.c (Bodo Stroesser 2005-09-03 15:57:50 -0700 160) *addr = stack;
d67b569f5f620 arch/um/kernel/skas/mem_user.c (Jeff Dike 2005-07-07 17:56:49 -0700 161)
07bf731e4b95d arch/um/kernel/skas/mem_user.c (Bodo Stroesser 2005-09-03 15:57:50 -0700 162) *stack = data_count * sizeof(long);
^1da177e4c3f4 arch/um/kernel/skas/mem_user.c (Linus Torvalds 2005-04-16 15:20:36 -0700 163)
07bf731e4b95d arch/um/kernel/skas/mem_user.c (Bodo Stroesser 2005-09-03 15:57:50 -0700 164) memcpy(stack + 1, data, data_count * sizeof(long));
c56004901fa5d arch/um/kernel/skas/mem_user.c (Jeff Dike 2005-09-03 15:57:36 -0700 165)
c539ab73070b3 arch/um/os-Linux/skas/mem.c (Jeff Dike 2007-06-16 10:16:09 -0700 166) *stub_addr = (void *)(((unsigned long)(stack + 1) &
54ae36f24b103 arch/um/os-Linux/skas/mem.c (Jeff Dike 2007-10-16 01:27:33 -0700 167) ~UM_KERN_PAGE_MASK) + STUB_DATA);
c56004901fa5d arch/um/kernel/skas/mem_user.c (Jeff Dike 2005-09-03 15:57:36 -0700 168)
07bf731e4b95d arch/um/kernel/skas/mem_user.c (Bodo Stroesser 2005-09-03 15:57:50 -0700 169) return 0;
c56004901fa5d arch/um/kernel/skas/mem_user.c (Jeff Dike 2005-09-03 15:57:36 -0700 170) }
c56004901fa5d arch/um/kernel/skas/mem_user.c (Jeff Dike 2005-09-03 15:57:36 -0700 171)
16dd07bc6404c arch/um/os-Linux/skas/mem.c (Jeff Dike 2007-05-06 14:51:48 -0700 172) int map(struct mm_id * mm_idp, unsigned long virt, unsigned long len, int prot,
16dd07bc6404c arch/um/os-Linux/skas/mem.c (Jeff Dike 2007-05-06 14:51:48 -0700 173) int phys_fd, unsigned long long offset, int done, void **data)
^1da177e4c3f4 arch/um/kernel/skas/mem_user.c (Linus Torvalds 2005-04-16 15:20:36 -0700 174) {
16dd07bc6404c arch/um/os-Linux/skas/mem.c (Jeff Dike 2007-05-06 14:51:48 -0700 175) int ret;
d0b5e15f0c0fd arch/um/os-Linux/skas/mem.c (Richard Weinberger 2015-03-18 21:31:27 +0100 176) unsigned long args[] = { virt, len, prot,
d0b5e15f0c0fd arch/um/os-Linux/skas/mem.c (Richard Weinberger 2015-03-18 21:31:27 +0100 177) MAP_SHARED | MAP_FIXED, phys_fd,
d0b5e15f0c0fd arch/um/os-Linux/skas/mem.c (Richard Weinberger 2015-03-18 21:31:27 +0100 178) MMAP_OFFSET(offset) };
f45d9fc9d8067 arch/um/os-Linux/skas/mem.c (Gennady Sharapov 2006-01-18 17:42:45 -0800 179)
d0b5e15f0c0fd arch/um/os-Linux/skas/mem.c (Richard Weinberger 2015-03-18 21:31:27 +0100 180) ret = run_syscall_stub(mm_idp, STUB_MMAP_NR, args, virt,
d0b5e15f0c0fd arch/um/os-Linux/skas/mem.c (Richard Weinberger 2015-03-18 21:31:27 +0100 181) data, done);
d67b569f5f620 arch/um/kernel/skas/mem_user.c (Jeff Dike 2005-07-07 17:56:49 -0700 182)
07bf731e4b95d arch/um/kernel/skas/mem_user.c (Bodo Stroesser 2005-09-03 15:57:50 -0700 183) return ret;
^1da177e4c3f4 arch/um/kernel/skas/mem_user.c (Linus Torvalds 2005-04-16 15:20:36 -0700 184) }
^1da177e4c3f4 arch/um/kernel/skas/mem_user.c (Linus Torvalds 2005-04-16 15:20:36 -0700 185)
64f60841c0965 arch/um/os-Linux/skas/mem.c (Jeff Dike 2007-05-06 14:51:45 -0700 186) int unmap(struct mm_id * mm_idp, unsigned long addr, unsigned long len,
64f60841c0965 arch/um/os-Linux/skas/mem.c (Jeff Dike 2007-05-06 14:51:45 -0700 187) int done, void **data)
^1da177e4c3f4 arch/um/kernel/skas/mem_user.c (Linus Torvalds 2005-04-16 15:20:36 -0700 188) {
f45d9fc9d8067 arch/um/os-Linux/skas/mem.c (Gennady Sharapov 2006-01-18 17:42:45 -0800 189) int ret;
d0b5e15f0c0fd arch/um/os-Linux/skas/mem.c (Richard Weinberger 2015-03-18 21:31:27 +0100 190) unsigned long args[] = { (unsigned long) addr, len, 0, 0, 0,
d0b5e15f0c0fd arch/um/os-Linux/skas/mem.c (Richard Weinberger 2015-03-18 21:31:27 +0100 191) 0 };
f45d9fc9d8067 arch/um/os-Linux/skas/mem.c (Gennady Sharapov 2006-01-18 17:42:45 -0800 192)
d0b5e15f0c0fd arch/um/os-Linux/skas/mem.c (Richard Weinberger 2015-03-18 21:31:27 +0100 193) ret = run_syscall_stub(mm_idp, __NR_munmap, args, 0,
d0b5e15f0c0fd arch/um/os-Linux/skas/mem.c (Richard Weinberger 2015-03-18 21:31:27 +0100 194) data, done);
d67b569f5f620 arch/um/kernel/skas/mem_user.c (Jeff Dike 2005-07-07 17:56:49 -0700 195)
f45d9fc9d8067 arch/um/os-Linux/skas/mem.c (Gennady Sharapov 2006-01-18 17:42:45 -0800 196) return ret;
d67b569f5f620 arch/um/kernel/skas/mem_user.c (Jeff Dike 2005-07-07 17:56:49 -0700 197) }
^1da177e4c3f4 arch/um/kernel/skas/mem_user.c (Linus Torvalds 2005-04-16 15:20:36 -0700 198)
07bf731e4b95d arch/um/kernel/skas/mem_user.c (Bodo Stroesser 2005-09-03 15:57:50 -0700 199) int protect(struct mm_id * mm_idp, unsigned long addr, unsigned long len,
16dd07bc6404c arch/um/os-Linux/skas/mem.c (Jeff Dike 2007-05-06 14:51:48 -0700 200) unsigned int prot, int done, void **data)
d67b569f5f620 arch/um/kernel/skas/mem_user.c (Jeff Dike 2005-07-07 17:56:49 -0700 201) {
16dd07bc6404c arch/um/os-Linux/skas/mem.c (Jeff Dike 2007-05-06 14:51:48 -0700 202) int ret;
d0b5e15f0c0fd arch/um/os-Linux/skas/mem.c (Richard Weinberger 2015-03-18 21:31:27 +0100 203) unsigned long args[] = { addr, len, prot, 0, 0, 0 };
f45d9fc9d8067 arch/um/os-Linux/skas/mem.c (Gennady Sharapov 2006-01-18 17:42:45 -0800 204)
d0b5e15f0c0fd arch/um/os-Linux/skas/mem.c (Richard Weinberger 2015-03-18 21:31:27 +0100 205) ret = run_syscall_stub(mm_idp, __NR_mprotect, args, 0,
d0b5e15f0c0fd arch/um/os-Linux/skas/mem.c (Richard Weinberger 2015-03-18 21:31:27 +0100 206) data, done);
f45d9fc9d8067 arch/um/os-Linux/skas/mem.c (Gennady Sharapov 2006-01-18 17:42:45 -0800 207)
f45d9fc9d8067 arch/um/os-Linux/skas/mem.c (Gennady Sharapov 2006-01-18 17:42:45 -0800 208) return ret;
^1da177e4c3f4 arch/um/kernel/skas/mem_user.c (Linus Torvalds 2005-04-16 15:20:36 -0700 209) }
VisionFive2 Linux kernel
StarFive Tech Linux Kernel for VisionFive (JH7110) boards (mirror)
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