strace: support aarch64

Author: rnpnr

pkg/strace/config.h

@@ -222,7 +222,7 @@
 #define HAVE_STRUCT_IOCB_AIO_RW_FLAGS 1
 #define HAVE_STRUCT_KBDIACRSUC 1
 #define HAVE_STRUCT_KBDIACRUC 1
-#define HAVE_STRUCT_KVM_CPUID2 1
+/* #undef HAVE_STRUCT_KVM_CPUID2 */
 #define HAVE_STRUCT_KVM_REGS 1
 #define HAVE_STRUCT_KVM_SREGS 1
 #define HAVE_STRUCT_KVM_USERSPACE_MEMORY_REGION 1
@@ -258,13 +258,13 @@
 #define HAVE_STRUCT_TERMIOS2 1
 /* #undef HAVE_STRUCT_TERMIOS_C_ISPEED */
 /* #undef HAVE_STRUCT_TERMIOS_C_OSPEED */
-#define HAVE_STRUCT_USER_DESC 1
-#define HAVE_STRUCT_USER_DESC_LM 1
+/* #undef HAVE_STRUCT_USER_DESC */
+/* #undef HAVE_STRUCT_USER_DESC_LM */
 #define HAVE_STRUCT_UTSNAME_DOMAINNAME 1
 /* #undef HAVE_STRUCT___AIO_SIGSET */
 #define HAVE_STRUCT___KERNEL_SOCK_TIMEVAL 1
 #define HAVE_STRUCT___KERNEL_TIMESPEC 1
-#define HAVE_STRUCT___OLD_KERNEL_STAT 1
+/* #undef HAVE_STRUCT___OLD_KERNEL_STAT */
 #define HAVE_STRUCT___PTRACE_SYSCALL_INFO 1
 #define HAVE_SYNC_FILE_RANGE 1
 #define HAVE_SYS_EVENTFD_H 1
@@ -540,7 +540,7 @@
 # endif
 #endif
 /* #undef X32 */
-#define X86_64 1
+/* #undef X86_64 */
 /* #undef XTENSA */
 /* #undef gid_t */
 /* #undef typeof */

pkg/strace/gen.lua

@@ -1,14 +1,32 @@
+local arch = ({
+	aarch64='aarch64',
+	x86_64='x86_64',
+})[config.target.platform:match('[^-]*')]
+-- NOTE: strace is architecture specific, skip generation on unsupported archs
+if not arch then return end
+
 cflags{
 	'-D HAVE_CONFIG_H',
 	'-D IN_STRACE',
 	-- it is important that the arch-specific directory is searched first
-	'-I $srcdir/src/linux/x86_64',
+	'-I $srcdir/src/linux/'..arch,
 	'-I $srcdir/src/linux/generic',
 	'-I $srcdir/src',
 	'-I $outdir',
 	'-isystem $builddir/pkg/linux-headers/include',
 }
 
+local arch_cflags = {}
+arch_cflags['aarch64'] = {'-D AARCH64=1'}
+arch_cflags['x86_64']  = {
+	'-D X86_64=1',
+	'-D HAVE_STRUCT_KVM_CPUID2=1',
+	'-D HAVE_STRUCT_USER_DESC=1',
+	'-D HAVE_STRUCT_USER_DESC_LM=1',
+	'-D HAVE_STRUCT___OLD_KERNEL_STAT=1',
+}
+cflags(arch_cflags[arch])
+
 build('cat', '$outdir/config.h', {
 	'$builddir/probe/HAVE___BUILTIN_POPCOUNT',
 	'$dir/config.h',
@@ -22,16 +40,21 @@ build('sed', '$outdir/ioctl_iocdef.h', '$outdir/ioctl_iocdef.i', {
 sub('tools.ninja', function()
 	toolchain(config.host)
 	cflags{
-		'-D X86_64=1',
-		'-I $srcdir/src/linux/x86_64',
+		'-I $srcdir/src/linux/'..arch,
 		'-I $srcdir/src/linux',
 		'-I $outdir',
 	}
+	cflags(arch_cflags[arch])
+
+	local arch_h_count = {
+		aarch64=1,
+		x86_64=2,
+	}
 
-	for i = 0, 2 do
+	for i = 0, arch_h_count[arch] do
 		build('cat', '$outdir/ioctls_all'..i..'.h', {
-			'$srcdir/src/linux/x86_64/ioctls_inc'..i..'.h',
-			'$srcdir/src/linux/x86_64/ioctls_arch'..i..'.h',
+			'$srcdir/src/linux/'..arch..'/ioctls_inc'..i..'.h',
+			'$srcdir/src/linux/'..arch..'/ioctls_arch'..i..'.h',
 		})
 		build('cc', '$outdir/ioctlsort'..i..'.c.o', {
 			'$srcdir/src/ioctlsort.c',