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Diffstat (limited to 'arch/x86/kernel/signal_compat.c')
-rw-r--r--arch/x86/kernel/signal_compat.c191
1 files changed, 0 insertions, 191 deletions
diff --git a/arch/x86/kernel/signal_compat.c b/arch/x86/kernel/signal_compat.c
deleted file mode 100644
index 879ef8c72f5c..000000000000
--- a/arch/x86/kernel/signal_compat.c
+++ /dev/null
@@ -1,191 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-#include <linux/compat.h>
-#include <linux/uaccess.h>
-#include <linux/ptrace.h>
-
-/*
- * The compat_siginfo_t structure and handing code is very easy
- * to break in several ways. It must always be updated when new
- * updates are made to the main siginfo_t, and
- * copy_siginfo_to_user32() must be updated when the
- * (arch-independent) copy_siginfo_to_user() is updated.
- *
- * It is also easy to put a new member in the compat_siginfo_t
- * which has implicit alignment which can move internal structure
- * alignment around breaking the ABI. This can happen if you,
- * for instance, put a plain 64-bit value in there.
- */
-static inline void signal_compat_build_tests(void)
-{
- int _sifields_offset = offsetof(compat_siginfo_t, _sifields);
-
- /*
- * If adding a new si_code, there is probably new data in
- * the siginfo. Make sure folks bumping the si_code
- * limits also have to look at this code. Make sure any
- * new fields are handled in copy_siginfo_to_user32()!
- */
- BUILD_BUG_ON(NSIGILL != 11);
- BUILD_BUG_ON(NSIGFPE != 15);
- BUILD_BUG_ON(NSIGSEGV != 9);
- BUILD_BUG_ON(NSIGBUS != 5);
- BUILD_BUG_ON(NSIGTRAP != 6);
- BUILD_BUG_ON(NSIGCHLD != 6);
- BUILD_BUG_ON(NSIGSYS != 2);
-
- /* This is part of the ABI and can never change in size: */
- BUILD_BUG_ON(sizeof(siginfo_t) != 128);
- BUILD_BUG_ON(sizeof(compat_siginfo_t) != 128);
-
- /* This is a part of the ABI and can never change in alignment */
- BUILD_BUG_ON(__alignof__(siginfo_t) != 8);
- BUILD_BUG_ON(__alignof__(compat_siginfo_t) != 4);
-
- /*
- * The offsets of all the (unioned) si_fields are fixed
- * in the ABI, of course. Make sure none of them ever
- * move and are always at the beginning:
- */
- BUILD_BUG_ON(offsetof(compat_siginfo_t, _sifields) != 3 * sizeof(int));
-#define CHECK_CSI_OFFSET(name) BUILD_BUG_ON(_sifields_offset != offsetof(compat_siginfo_t, _sifields.name))
-
- BUILD_BUG_ON(offsetof(siginfo_t, si_signo) != 0);
- BUILD_BUG_ON(offsetof(siginfo_t, si_errno) != 4);
- BUILD_BUG_ON(offsetof(siginfo_t, si_code) != 8);
-
- BUILD_BUG_ON(offsetof(compat_siginfo_t, si_signo) != 0);
- BUILD_BUG_ON(offsetof(compat_siginfo_t, si_errno) != 4);
- BUILD_BUG_ON(offsetof(compat_siginfo_t, si_code) != 8);
- /*
- * Ensure that the size of each si_field never changes.
- * If it does, it is a sign that the
- * copy_siginfo_to_user32() code below needs to updated
- * along with the size in the CHECK_SI_SIZE().
- *
- * We repeat this check for both the generic and compat
- * siginfos.
- *
- * Note: it is OK for these to grow as long as the whole
- * structure stays within the padding size (checked
- * above).
- */
-#define CHECK_CSI_SIZE(name, size) BUILD_BUG_ON(size != sizeof(((compat_siginfo_t *)0)->_sifields.name))
-#define CHECK_SI_SIZE(name, size) BUILD_BUG_ON(size != sizeof(((siginfo_t *)0)->_sifields.name))
-
- CHECK_CSI_OFFSET(_kill);
- CHECK_CSI_SIZE (_kill, 2*sizeof(int));
- CHECK_SI_SIZE (_kill, 2*sizeof(int));
-
- BUILD_BUG_ON(offsetof(siginfo_t, si_pid) != 0x10);
- BUILD_BUG_ON(offsetof(siginfo_t, si_uid) != 0x14);
- BUILD_BUG_ON(offsetof(compat_siginfo_t, si_pid) != 0xC);
- BUILD_BUG_ON(offsetof(compat_siginfo_t, si_uid) != 0x10);
-
- CHECK_CSI_OFFSET(_timer);
- CHECK_CSI_SIZE (_timer, 3*sizeof(int));
- CHECK_SI_SIZE (_timer, 6*sizeof(int));
-
- BUILD_BUG_ON(offsetof(siginfo_t, si_tid) != 0x10);
- BUILD_BUG_ON(offsetof(siginfo_t, si_overrun) != 0x14);
- BUILD_BUG_ON(offsetof(siginfo_t, si_value) != 0x18);
- BUILD_BUG_ON(offsetof(compat_siginfo_t, si_tid) != 0x0C);
- BUILD_BUG_ON(offsetof(compat_siginfo_t, si_overrun) != 0x10);
- BUILD_BUG_ON(offsetof(compat_siginfo_t, si_value) != 0x14);
-
- CHECK_CSI_OFFSET(_rt);
- CHECK_CSI_SIZE (_rt, 3*sizeof(int));
- CHECK_SI_SIZE (_rt, 4*sizeof(int));
-
- BUILD_BUG_ON(offsetof(siginfo_t, si_pid) != 0x10);
- BUILD_BUG_ON(offsetof(siginfo_t, si_uid) != 0x14);
- BUILD_BUG_ON(offsetof(siginfo_t, si_value) != 0x18);
- BUILD_BUG_ON(offsetof(compat_siginfo_t, si_pid) != 0x0C);
- BUILD_BUG_ON(offsetof(compat_siginfo_t, si_uid) != 0x10);
- BUILD_BUG_ON(offsetof(compat_siginfo_t, si_value) != 0x14);
-
- CHECK_CSI_OFFSET(_sigchld);
- CHECK_CSI_SIZE (_sigchld, 5*sizeof(int));
- CHECK_SI_SIZE (_sigchld, 8*sizeof(int));
-
- BUILD_BUG_ON(offsetof(siginfo_t, si_pid) != 0x10);
- BUILD_BUG_ON(offsetof(siginfo_t, si_uid) != 0x14);
- BUILD_BUG_ON(offsetof(siginfo_t, si_status) != 0x18);
- BUILD_BUG_ON(offsetof(siginfo_t, si_utime) != 0x20);
- BUILD_BUG_ON(offsetof(siginfo_t, si_stime) != 0x28);
- BUILD_BUG_ON(offsetof(compat_siginfo_t, si_pid) != 0x0C);
- BUILD_BUG_ON(offsetof(compat_siginfo_t, si_uid) != 0x10);
- BUILD_BUG_ON(offsetof(compat_siginfo_t, si_status) != 0x14);
- BUILD_BUG_ON(offsetof(compat_siginfo_t, si_utime) != 0x18);
- BUILD_BUG_ON(offsetof(compat_siginfo_t, si_stime) != 0x1C);
-
-#ifdef CONFIG_X86_X32_ABI
- CHECK_CSI_OFFSET(_sigchld_x32);
- CHECK_CSI_SIZE (_sigchld_x32, 7*sizeof(int));
- /* no _sigchld_x32 in the generic siginfo_t */
- BUILD_BUG_ON(offsetof(compat_siginfo_t, _sifields._sigchld_x32._utime) != 0x18);
- BUILD_BUG_ON(offsetof(compat_siginfo_t, _sifields._sigchld_x32._stime) != 0x20);
-#endif
-
- CHECK_CSI_OFFSET(_sigfault);
- CHECK_CSI_SIZE (_sigfault, 4*sizeof(int));
- CHECK_SI_SIZE (_sigfault, 8*sizeof(int));
-
- BUILD_BUG_ON(offsetof(siginfo_t, si_addr) != 0x10);
- BUILD_BUG_ON(offsetof(compat_siginfo_t, si_addr) != 0x0C);
-
- BUILD_BUG_ON(offsetof(siginfo_t, si_trapno) != 0x18);
- BUILD_BUG_ON(offsetof(compat_siginfo_t, si_trapno) != 0x10);
-
- BUILD_BUG_ON(offsetof(siginfo_t, si_addr_lsb) != 0x18);
- BUILD_BUG_ON(offsetof(compat_siginfo_t, si_addr_lsb) != 0x10);
-
- BUILD_BUG_ON(offsetof(siginfo_t, si_lower) != 0x20);
- BUILD_BUG_ON(offsetof(siginfo_t, si_upper) != 0x28);
- BUILD_BUG_ON(offsetof(compat_siginfo_t, si_lower) != 0x14);
- BUILD_BUG_ON(offsetof(compat_siginfo_t, si_upper) != 0x18);
-
- BUILD_BUG_ON(offsetof(siginfo_t, si_pkey) != 0x20);
- BUILD_BUG_ON(offsetof(compat_siginfo_t, si_pkey) != 0x14);
-
- BUILD_BUG_ON(offsetof(siginfo_t, si_perf_data) != 0x18);
- BUILD_BUG_ON(offsetof(siginfo_t, si_perf_type) != 0x20);
- BUILD_BUG_ON(offsetof(siginfo_t, si_perf_flags) != 0x24);
- BUILD_BUG_ON(offsetof(compat_siginfo_t, si_perf_data) != 0x10);
- BUILD_BUG_ON(offsetof(compat_siginfo_t, si_perf_type) != 0x14);
- BUILD_BUG_ON(offsetof(compat_siginfo_t, si_perf_flags) != 0x18);
-
- CHECK_CSI_OFFSET(_sigpoll);
- CHECK_CSI_SIZE (_sigpoll, 2*sizeof(int));
- CHECK_SI_SIZE (_sigpoll, 4*sizeof(int));
-
- BUILD_BUG_ON(offsetof(siginfo_t, si_band) != 0x10);
- BUILD_BUG_ON(offsetof(siginfo_t, si_fd) != 0x18);
- BUILD_BUG_ON(offsetof(compat_siginfo_t, si_band) != 0x0C);
- BUILD_BUG_ON(offsetof(compat_siginfo_t, si_fd) != 0x10);
-
- CHECK_CSI_OFFSET(_sigsys);
- CHECK_CSI_SIZE (_sigsys, 3*sizeof(int));
- CHECK_SI_SIZE (_sigsys, 4*sizeof(int));
-
- BUILD_BUG_ON(offsetof(siginfo_t, si_call_addr) != 0x10);
- BUILD_BUG_ON(offsetof(siginfo_t, si_syscall) != 0x18);
- BUILD_BUG_ON(offsetof(siginfo_t, si_arch) != 0x1C);
- BUILD_BUG_ON(offsetof(compat_siginfo_t, si_call_addr) != 0x0C);
- BUILD_BUG_ON(offsetof(compat_siginfo_t, si_syscall) != 0x10);
- BUILD_BUG_ON(offsetof(compat_siginfo_t, si_arch) != 0x14);
-
- /* any new si_fields should be added here */
-}
-
-void sigaction_compat_abi(struct k_sigaction *act, struct k_sigaction *oact)
-{
- signal_compat_build_tests();
-
- if (!act)
- return;
-
- if (in_ia32_syscall())
- act->sa.sa_flags |= SA_IA32_ABI;
- if (in_x32_syscall())
- act->sa.sa_flags |= SA_X32_ABI;
-}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-23 07:02:15 +0100