fix arm and aarch64 sp.

bpf/aya-bpf/src/args.rs

@@ -119,7 +119,7 @@ impl<T> FromPtRegs for *const T {
     }
 
     fn from_stack_argument(ctx: &pt_regs, n: usize) -> Option<Self> {
-        let addr: __u64 = &ctx.sp + 8 * (n + 1) as __u64;
+        let addr: __u64 = &ctx.rsp + 8 * (n + 1) as __u64;
         unsafe { bpf_probe_read(addr as *const c_int).map(|v| v as *const _).ok() }
     }
 
@@ -139,7 +139,7 @@ impl<T> FromPtRegs for *const T {
     }
 
     fn from_stack_argument(ctx: &pt_regs, n: usize) -> Option<Self> {
-        let addr: __u64 = &ctx.sp + 8 * (n + 1) as __u64;
+        let addr: __u64 = &ctx.uregs[13] + 8 * (n + 1) as __u64;
         unsafe { bpf_probe_read(addr as *const c_int).map(|v| v as *const _).ok() }
     }
 
@@ -183,7 +183,7 @@ impl<T> FromPtRegs for *mut T {
     }
 
     fn from_stack_argument(ctx: &pt_regs, n: usize) -> Option<Self> {
-        let addr: __u64 = &ctx.sp + 8 * (n + 1) as __u64;
+        let addr: __u64 = &ctx.rsp + 8 * (n + 1) as __u64;
         unsafe { bpf_probe_read(addr as *const c_int).map(|v| v as *mut _).ok() }
     }
 
@@ -203,7 +203,7 @@ impl<T> FromPtRegs for *mut T {
     }
 
     fn from_stack_argument(ctx: &pt_regs, n: usize) -> Option<Self> {
-        let addr: __u64 = &ctx.sp + 8 * (n + 1) as __u64;
+        let addr: __u64 = &ctx.uregs[13] + 8 * (n + 1) as __u64;
         unsafe { bpf_probe_read(addr as *const c_int).map(|v| v as *mut _).ok() }
     }