Define SYS_perf_event_open and SYS_prctl in a single place

Author: giordano

src/LinuxPerf.jl

@@ -157,28 +157,29 @@ function Base.show(io::IO, e::EventType)
     end
 end
 
-# To support a new architecture, look for the code corresponding to the `perf_event_open`
-# syscall in https://gpages.juszkiewicz.com.pl/syscalls-table/syscalls.html
-const SYS_perf_event_open = if Sys.ARCH === :x86_64
+# To support a new architecture, look for the codes corresponding to the
+# `perf_event_open` and `prctl` syscalls in
+# https://gpages.juszkiewicz.com.pl/syscalls-table/syscalls.html
+const SYS_perf_event_open, SYS_prctl = if Sys.ARCH === :x86_64
     # See also https://github.com/torvalds/linux/blob/b62cef9a5c673f1b8083159f5dc03c1c5daced2f/arch/x86/entry/syscalls/syscall_64.tbl
-    Clong(298)
+    Clong(298), Clong(157)
 elseif Sys.ARCH === :i686
     # See also https://github.com/torvalds/linux/blob/b62cef9a5c673f1b8083159f5dc03c1c5daced2f/arch/x86/entry/syscalls/syscall_32.tbl
-    Clong(336)
+    Clong(336), Clong(172)
 elseif Sys.ARCH === :aarch64
-    # See also https://arm64.syscall.sh/
-    Clong(241)
+    # See also https://github.com/torvalds/linux/blob/b62cef9a5c673f1b8083159f5dc03c1c5daced2f/scripts/syscall.tbl
+    Clong(241), Clong(167)
 elseif Sys.ARCH === :arm
     # See also https://github.com/torvalds/linux/blob/b62cef9a5c673f1b8083159f5dc03c1c5daced2f/arch/arm/tools/syscall.tbl
-    Clong(364)
+    Clong(364), Clong(172)
 elseif Sys.ARCH === :powerpc64le || Sys.ARCH === :ppc64le
     # See also https://github.com/torvalds/linux/blob/b62cef9a5c673f1b8083159f5dc03c1c5daced2f/arch/powerpc/kernel/syscalls/syscall.tbl
-    Clong(319)
+    Clong(319), Clong(171)
 elseif Sys.ARCH === :riscv64 || Sys.ARCH === :rv64
-    # See also https://jborza.com/post/2021-05-11-riscv-linux-syscalls/
-    Clong(241)
+    # See also https://github.com/torvalds/linux/blob/b62cef9a5c673f1b8083159f5dc03c1c5daced2f/scripts/syscall.tbl
+    Clong(241), Clong(167)
 else
-    Clong(-1) # sentinel for unknown syscall ID
+    Clong(-1), Clong(-1) # sentinel for unknown syscall ID
 end
 
 """
@@ -350,29 +351,6 @@ function Base.show(io::IO, g::EventGroup)
     print(io, "\t", g.event_types[end], ")")
 end
 
-# To support a new architecture, look for the code corresponding to the `prctl` syscall in
-# https://gpages.juszkiewicz.com.pl/syscalls-table/syscalls.html
-const SYS_prctl = if Sys.ARCH === :x86_64
-    # See also https://github.com/torvalds/linux/blob/b62cef9a5c673f1b8083159f5dc03c1c5daced2f/arch/x86/entry/syscalls/syscall_64.tbl
-    Clong(157)
-elseif Sys.ARCH === :i686
-    # See also https://github.com/torvalds/linux/blob/b62cef9a5c673f1b8083159f5dc03c1c5daced2f/arch/x86/entry/syscalls/syscall_32.tbl
-    Clong(172)
-elseif Sys.ARCH === :aarch64
-    # See also https://arm64.syscall.sh/
-    Clong(167)
-elseif Sys.ARCH === :arm
-    # See also https://github.com/torvalds/linux/blob/b62cef9a5c673f1b8083159f5dc03c1c5daced2f/arch/arm/tools/syscall.tbl
-    Clong(172)
-elseif Sys.ARCH === :powerpc64le || Sys.ARCH === :ppc64le
-    # See also https://github.com/torvalds/linux/blob/b62cef9a5c673f1b8083159f5dc03c1c5daced2f/arch/powerpc/kernel/syscalls/syscall.tbl
-    Clong(171)
-elseif Sys.ARCH === :riscv64 || Sys.ARCH === :rv64
-    # See also https://jborza.com/post/2021-05-11-riscv-linux-syscalls/
-    Clong(167)
-else
-    Clong(-1) # sentinel for unknown syscall ID
-end
 const PR_TASK_PERF_EVENTS_DISABLE = Cint(31)
 const PR_TASK_PERF_EVENTS_ENABLE = Cint(32)