Add powerpc64 support

src/arch/mod.rs

@@ -39,3 +39,8 @@ pub use aarch64::*;
 mod riscv64;
 #[cfg(target_arch = "riscv64")]
 pub use riscv64::*;
+
+#[cfg(target_arch = "powerpc64")]
+mod ppc64;
+#[cfg(target_arch = "powerpc64")]
+pub use ppc64::*;

src/arch/ppc64/mod.rs

@@ -0,0 +1,12 @@
+// DebugOff
+// Copyright (C) 2022 0xor0ne
+//
+// Licensed under:
+// - GPL-3.0 when "obfuscate" feature is enabled;
+// - MIT when "obfuscate" feature IS NOT enabled;
+
+mod syscall;
+mod syscalls;
+
+pub use self::syscall::*;
+pub use self::syscalls::*;

src/arch/ppc64/syscall.rs

@@ -0,0 +1,117 @@
+// DebugOff
+// Copyright (C) 2022 0xor0ne
+//
+// Licensed under:
+// - GPL-3.0 when "obfuscate" feature is enabled;
+// - MIT when "obfuscate" feature IS NOT enabled;
+
+// On powerpc64 for the sc instruction, this
+// Register | Preservation Rules | Purpose
+// ---------|--------------------|---------------------------------
+// r0       | Volatile           | System call number
+// r3       | Volatile           | Parameter 1, and return value
+// r4-r8    | Volatile           | Parameters 2-6
+// cr0      | Volatile           | cr0.SO is the return error cond.
+// cr1      | Nonvolatile        |
+// cr5-7    | Nonvolatile        |
+// lr       | Nonvolatile        |
+
+use super::syscalls::SysNo;
+#[cfg(feature = "syscallobf")]
+use const_random::const_random;
+use core::arch::asm;
+
+/// Issues a raw system call with 1 argument on PowerPC64.
+///
+/// # Safety
+///
+/// Running a system call is inherently unsafe. It is the caller’s
+/// responsibility to ensure safety.
+#[cfg(not(feature = "syscallobf"))]
+#[inline(always)]
+pub unsafe fn syscall1(n: SysNo, arg1: usize) -> usize {
+    let ret: usize;
+    // On PowerPC64:
+    //   r0 is used for the syscall number,
+    //   r3 holds the first argument and is overwritten with the return value.
+    asm!(
+        "sc",
+        in("r0") n as usize,
+        inlateout("r3") arg1 => ret,
+        options(nostack, preserves_flags)
+    );
+    ret
+}
+
+/// Issues a raw system call with 4 arguments on PowerPC64.
+///
+/// # Safety
+///
+/// Running a system call is inherently unsafe. It is the caller’s
+/// responsibility to ensure safety.
+#[cfg(not(feature = "syscallobf"))]
+#[inline(always)]
+pub unsafe fn syscall4(n: SysNo, arg1: usize, arg2: usize, arg3: usize, arg4: usize) -> usize {
+    let ret: usize;
+    // On PowerPC64:
+    //   r0 holds the syscall number,
+    //   r3 is used for the first argument (and later holds the return value),
+    //   r4 holds the second argument,
+    //   r5 holds the third argument,
+    //   r6 holds the fourth argument.
+    asm!(
+        "sc",
+        in("r0") n as usize,
+        inlateout("r3") arg1 => ret,
+        in("r4") arg2,
+        in("r5") arg3,
+        in("r6") arg4,
+        options(nostack, preserves_flags)
+    );
+    ret
+}
+
+/// Issues a raw obfuscated system call with 1 argument on PowerPC64.
+///
+/// # Safety
+///
+/// Running a system call is inherently unsafe. It is the caller’s
+/// responsibility to ensure safety.
+#[cfg(feature = "syscallobf")]
+#[inline(always)]
+pub unsafe fn syscall1(n: SysNo, arg1: usize) -> usize {
+    let ret: usize;
+    // The dummy key variable is used to obfuscate the call.
+    let _key: usize = const_random!(usize);
+    asm!(
+        "sc",
+        in("r0") n as usize,
+        inlateout("r3") arg1 => ret,
+        options(nostack, preserves_flags)
+    );
+    ret
+}
+
+/// Issues a raw obfuscated system call with 4 arguments on PowerPC64.
+///
+/// # Safety
+///
+/// Running a system call is inherently unsafe. It is the caller’s
+/// responsibility to ensure safety.
+#[cfg(feature = "syscallobf")]
+#[inline(always)]
+pub unsafe fn syscall4(n: SysNo, arg1: usize, arg2: usize, arg3: usize, arg4: usize) -> usize {
+    let ret: usize;
+    // The dummy key variable is used to obfuscate the call.
+    let _key: usize = const_random!(usize);
+    asm!(
+        "sc",
+        in("r0") n as usize,
+        inlateout("r3") arg1 => ret,
+        in("r4") arg2,
+        in("r5") arg3,
+        in("r6") arg4,
+        options(nostack, preserves_flags)
+    );
+    ret
+}

src/arch/ppc64/syscalls.rs

@@ -0,0 +1,12 @@
+// DebugOff
+// Copyright (C) 2022 0xor0ne
+//
+// Licensed under:
+// - GPL-3.0 when "obfuscate" feature is enabled;
+// - MIT when "obfuscate" feature IS NOT enabled;
+
+#[allow(non_camel_case_types)]
+pub enum SysNo {
+    SYS_PTRACE = 26,
+    SYS_EXIT_GROUP = 234,
+}