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Diffstat (limited to 'arch/x86/include/asm/ia32.h')
-rw-r--r--arch/x86/include/asm/ia32.h94
1 files changed, 94 insertions, 0 deletions
diff --git a/arch/x86/include/asm/ia32.h b/arch/x86/include/asm/ia32.h
new file mode 100644
index 000000000..980562947
--- /dev/null
+++ b/arch/x86/include/asm/ia32.h
@@ -0,0 +1,94 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _ASM_X86_IA32_H
+#define _ASM_X86_IA32_H
+
+
+#ifdef CONFIG_IA32_EMULATION
+
+#include <linux/compat.h>
+
+/*
+ * 32 bit structures for IA32 support.
+ */
+
+#include <uapi/asm/sigcontext.h>
+
+/* signal.h */
+
+struct ucontext_ia32 {
+ unsigned int uc_flags;
+ unsigned int uc_link;
+ compat_stack_t uc_stack;
+ struct sigcontext_32 uc_mcontext;
+ compat_sigset_t uc_sigmask; /* mask last for extensibility */
+};
+
+/* This matches struct stat64 in glibc2.2, hence the absolutely
+ * insane amounts of padding around dev_t's.
+ */
+struct stat64 {
+ unsigned long long st_dev;
+ unsigned char __pad0[4];
+
+#define STAT64_HAS_BROKEN_ST_INO 1
+ unsigned int __st_ino;
+
+ unsigned int st_mode;
+ unsigned int st_nlink;
+
+ unsigned int st_uid;
+ unsigned int st_gid;
+
+ unsigned long long st_rdev;
+ unsigned char __pad3[4];
+
+ long long st_size;
+ unsigned int st_blksize;
+
+ long long st_blocks;/* Number 512-byte blocks allocated */
+
+ unsigned st_atime;
+ unsigned st_atime_nsec;
+ unsigned st_mtime;
+ unsigned st_mtime_nsec;
+ unsigned st_ctime;
+ unsigned st_ctime_nsec;
+
+ unsigned long long st_ino;
+} __attribute__((packed));
+
+#define IA32_STACK_TOP IA32_PAGE_OFFSET
+
+#ifdef __KERNEL__
+struct linux_binprm;
+extern int ia32_setup_arg_pages(struct linux_binprm *bprm,
+ unsigned long stack_top, int exec_stack);
+struct mm_struct;
+extern void ia32_pick_mmap_layout(struct mm_struct *mm);
+
+#endif
+
+extern bool __ia32_enabled;
+
+static inline bool ia32_enabled(void)
+{
+ return __ia32_enabled;
+}
+
+static inline void ia32_disable(void)
+{
+ __ia32_enabled = false;
+}
+
+#else /* !CONFIG_IA32_EMULATION */
+
+static inline bool ia32_enabled(void)
+{
+ return IS_ENABLED(CONFIG_X86_32);
+}
+
+static inline void ia32_disable(void) {}
+
+#endif
+
+#endif /* _ASM_X86_IA32_H */