Auto merge of #3156 - ribalda:kexec, r=JohnTitor

linux: add kexec flags

This adds `KEXEC_ARCH_MASK`, `KEXEC_FILE_NO_INITRAMFS`, `KEXEC_FILE_ON_CRASH`, `KEXEC_FILE_UNLOAD`, `KEXEC_ON_CRASH`, and `KEXEC_PRESERVE_CONTEXT` constants on Linux and Android.

Those are used by `kexec` and `kexec_file_load` syscalls.

Author: bors

libc-test/build.rs

@@ -1631,6 +1631,7 @@ fn test_android(target: &str) {
                 "linux/if_link.h",
                 "linux/rtnetlink.h",
                 "linux/if_tun.h",
+                "linux/kexec.h",
                 "linux/magic.h",
                 "linux/membarrier.h",
                 "linux/memfd.h",
@@ -3250,6 +3251,7 @@ fn test_linux(target: &str) {
         "linux/if_tun.h",
         "linux/input.h",
         "linux/ipv6.h",
+        "linux/kexec.h",
         "linux/keyctl.h",
         "linux/magic.h",
         "linux/memfd.h",
@@ -3464,6 +3466,7 @@ fn test_linux(target: &str) {
                 || name.starts_with("F_")
                 || name.starts_with("FALLOC_FL_")
                 || name.starts_with("IFLA_")
+                || name.starts_with("KEXEC_")
                 || name.starts_with("MS_")
                 || name.starts_with("MSG_")
                 || name.starts_with("OPEN_TREE_")

libc-test/semver/android.txt

@@ -1032,6 +1032,12 @@ IXANY
 IXOFF
 IXON
 JFFS2_SUPER_MAGIC
+KEXEC_ARCH_MASK
+KEXEC_FILE_NO_INITRAMFS
+KEXEC_FILE_ON_CRASH
+KEXEC_FILE_UNLOAD
+KEXEC_ON_CRASH
+KEXEC_PRESERVE_CONTEXT
 KEY_CNT
 KEY_MAX
 LC_ADDRESS

libc-test/semver/linux.txt

@@ -1185,6 +1185,12 @@ J1939_PGN_MAX
 J1939_PGN_PDU1_MAX
 J1939_PGN_REQUEST
 KERNEL_VERSION
+KEXEC_ARCH_MASK
+KEXEC_FILE_NO_INITRAMFS
+KEXEC_FILE_ON_CRASH
+KEXEC_FILE_UNLOAD
+KEXEC_ON_CRASH
+KEXEC_PRESERVE_CONTEXT
 KEYCTL_ASSUME_AUTHORITY
 KEYCTL_CHOWN
 KEYCTL_CLEAR

src/unix/linux_like/android/mod.rs

@@ -1606,6 +1606,14 @@ pub const AI_ADDRCONFIG: ::c_int = 0x00000400;
 pub const AI_V4MAPPED: ::c_int = 0x00000800;
 pub const AI_DEFAULT: ::c_int = AI_V4MAPPED_CFG | AI_ADDRCONFIG;
 
+// linux/kexec.h
+pub const KEXEC_ON_CRASH: ::c_int = 0x00000001;
+pub const KEXEC_PRESERVE_CONTEXT: ::c_int = 0x00000002;
+pub const KEXEC_ARCH_MASK: ::c_int = 0xffff0000;
+pub const KEXEC_FILE_UNLOAD: ::c_int = 0x00000001;
+pub const KEXEC_FILE_ON_CRASH: ::c_int = 0x00000002;
+pub const KEXEC_FILE_NO_INITRAMFS: ::c_int = 0x00000004;
+
 pub const LINUX_REBOOT_MAGIC1: ::c_int = 0xfee1dead;
 pub const LINUX_REBOOT_MAGIC2: ::c_int = 672274793;
 pub const LINUX_REBOOT_MAGIC2A: ::c_int = 85072278;

src/unix/linux_like/linux/mod.rs

@@ -3550,6 +3550,14 @@ pub fn FUTEX_OP(op: ::c_int, oparg: ::c_int, cmp: ::c_int, cmparg: ::c_int) -> :
     ((op & 0xf) << 28) | ((cmp & 0xf) << 24) | ((oparg & 0xfff) << 12) | (cmparg & 0xfff)
 }
 
+// linux/kexec.h
+pub const KEXEC_ON_CRASH: ::c_int = 0x00000001;
+pub const KEXEC_PRESERVE_CONTEXT: ::c_int = 0x00000002;
+pub const KEXEC_ARCH_MASK: ::c_int = 0xffff0000;
+pub const KEXEC_FILE_UNLOAD: ::c_int = 0x00000001;
+pub const KEXEC_FILE_ON_CRASH: ::c_int = 0x00000002;
+pub const KEXEC_FILE_NO_INITRAMFS: ::c_int = 0x00000004;
+
 // linux/reboot.h
 pub const LINUX_REBOOT_MAGIC1: ::c_int = 0xfee1dead;
 pub const LINUX_REBOOT_MAGIC2: ::c_int = 672274793;