Fix syscall for macos

japaric · Jul 16, 2020 · 7ff94a6 · 7ff94a6
1 parent bf46a06
commit 7ff94a6
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Showing 2 changed files with 10 additions and 8 deletions.
diff --git a/Cargo.toml b/Cargo.toml
@@ -7,4 +7,4 @@ license = "MIT/Apache-2.0"
 name = "sc"
 readme = "README.md"
 repository = "https://github.com/japaric/syscall.rs"
-version = "0.2.2"
+version = "0.2.3"
diff --git a/src/platform/macos-x86_64/mod.rs b/src/platform/macos-x86_64/mod.rs
@@ -11,11 +11,13 @@
 
 pub mod nr;
 
+const MACOS_SYSCALL_PREFIX: usize = 33554432;
+
 #[inline(always)]
 pub unsafe fn syscall0(n: usize) -> usize {
     let ret: usize;
     llvm_asm!("syscall" : "={rax}"(ret)
-                   : "{rax}"(n)
+                   : "{rax}"(n + MACOS_SYSCALL_PREFIX)
                    : "rcx", "r11", "memory"
                    : "volatile");
     ret
@@ -25,7 +27,7 @@ pub unsafe fn syscall0(n: usize) -> usize {
 pub unsafe fn syscall1(n: usize, a1: usize) -> usize {
     let ret: usize;
     llvm_asm!("syscall" : "={rax}"(ret)
-                   : "{rax}"(n), "{rdi}"(a1)
+                   : "{rax}"(n + MACOS_SYSCALL_PREFIX), "{rdi}"(a1)
                    : "rcx", "r11", "memory"
                    : "volatile");
     ret
@@ -35,7 +37,7 @@ pub unsafe fn syscall1(n: usize, a1: usize) -> usize {
 pub unsafe fn syscall2(n: usize, a1: usize, a2: usize) -> usize {
     let ret: usize;
     llvm_asm!("syscall" : "={rax}"(ret)
-                   : "{rax}"(n), "{rdi}"(a1), "{rsi}"(a2)
+                   : "{rax}"(n + MACOS_SYSCALL_PREFIX), "{rdi}"(a1), "{rsi}"(a2)
                    : "rcx", "r11", "memory"
                    : "volatile");
     ret
@@ -45,7 +47,7 @@ pub unsafe fn syscall2(n: usize, a1: usize, a2: usize) -> usize {
 pub unsafe fn syscall3(n: usize, a1: usize, a2: usize, a3: usize) -> usize {
     let ret: usize;
     llvm_asm!("syscall" : "={rax}"(ret)
-                   : "{rax}"(n), "{rdi}"(a1), "{rsi}"(a2), "{rdx}"(a3)
+                   : "{rax}"(n + MACOS_SYSCALL_PREFIX), "{rdi}"(a1), "{rsi}"(a2), "{rdx}"(a3)
                    : "rcx", "r11", "memory"
                    : "volatile");
     ret
@@ -60,7 +62,7 @@ pub unsafe fn syscall4(n: usize,
                        -> usize {
     let ret: usize;
     llvm_asm!("syscall" : "={rax}"(ret)
-                   : "{rax}"(n), "{rdi}"(a1), "{rsi}"(a2), "{rdx}"(a3),
+                   : "{rax}"(n + MACOS_SYSCALL_PREFIX), "{rdi}"(a1), "{rsi}"(a2), "{rdx}"(a3),
                      "{r10}"(a4)
                    : "rcx", "r11", "memory"
                    : "volatile");
@@ -77,7 +79,7 @@ pub unsafe fn syscall5(n: usize,
                        -> usize {
     let ret: usize;
     llvm_asm!("syscall" : "={rax}"(ret)
-                   : "{rax}"(n), "{rdi}"(a1), "{rsi}"(a2), "{rdx}"(a3),
+                   : "{rax}"(n + MACOS_SYSCALL_PREFIX), "{rdi}"(a1), "{rsi}"(a2), "{rdx}"(a3),
                      "{r10}"(a4), "{r8}"(a5)
                    : "rcx", "r11", "memory"
                    : "volatile");
@@ -95,7 +97,7 @@ pub unsafe fn syscall6(n: usize,
                        -> usize {
     let ret: usize;
     llvm_asm!("syscall" : "={rax}"(ret)
-                   : "{rax}"(n), "{rdi}"(a1), "{rsi}"(a2), "{rdx}"(a3),
+                   : "{rax}"(n + MACOS_SYSCALL_PREFIX), "{rdi}"(a1), "{rsi}"(a2), "{rdx}"(a3),
                      "{r10}"(a4), "{r8}"(a5), "{r9}"(a6)
                    : "rcx", "r11", "memory"
                    : "volatile");