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Merged
Zentrik merged 4 commits into from
Jan 12, 2025
Merged

Support riscv64 #56

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3e231af
Support riscv64
giordano Jan 12, 2025
cb3c243
Add more references for syscall codes
giordano Jan 12, 2025
8643adf
Define `SYS_perf_event_open` and `SYS_prctl` in a single place
giordano Jan 12, 2025
0d5523b
Add asm call for prctl syscall on riscv64
giordano Jan 12, 2025
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2 changes: 1 addition & 1 deletion Project.toml
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Original file line number Diff line number Diff line change
@@ -1,6 +1,6 @@
name = "LinuxPerf"
uuid = "b4c46c6c-4fb0-484d-a11a-41bc3392d094"
version = "0.4.2"
version = "0.4.3"

[deps]
PrettyTables = "08abe8d2-0d0c-5749-adfa-8a2ac140af0d"
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42 changes: 22 additions & 20 deletions src/LinuxPerf.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -157,18 +157,29 @@ function Base.show(io::IO, e::EventType)
end
end

const SYS_perf_event_open = if Sys.ARCH === :x86_64
Clong(298)
# 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(157)
elseif Sys.ARCH === :i686
Clong(336)
# See also https://github.com/torvalds/linux/blob/b62cef9a5c673f1b8083159f5dc03c1c5daced2f/arch/x86/entry/syscalls/syscall_32.tbl
Clong(336), Clong(172)
elseif Sys.ARCH === :aarch64
Clong(241)
# See also https://github.com/torvalds/linux/blob/b62cef9a5c673f1b8083159f5dc03c1c5daced2f/scripts/syscall.tbl
Clong(241), Clong(167)
elseif Sys.ARCH === :arm
Clong(364)
# See also https://github.com/torvalds/linux/blob/b62cef9a5c673f1b8083159f5dc03c1c5daced2f/arch/arm/tools/syscall.tbl
Clong(364), Clong(172)
elseif Sys.ARCH === :powerpc64le || Sys.ARCH === :ppc64le
Clong(319)
# See also https://github.com/torvalds/linux/blob/b62cef9a5c673f1b8083159f5dc03c1c5daced2f/arch/powerpc/kernel/syscalls/syscall.tbl
Clong(319), Clong(171)
elseif Sys.ARCH === :riscv64 || Sys.ARCH === :rv64
# 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

"""
Expand Down Expand Up @@ -340,19 +351,6 @@ function Base.show(io::IO, g::EventGroup)
print(io, "\t", g.event_types[end], ")")
end

const SYS_prctl = if Sys.ARCH === :x86_64
Clong(157)
elseif Sys.ARCH === :i686
Clong(172)
elseif Sys.ARCH === :aarch64
Clong(167)
elseif Sys.ARCH === :arm
Clong(172)
elseif Sys.ARCH === :powerpc64le || Sys.ARCH === :ppc64le
Clong(171)
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)

Expand All @@ -376,6 +374,10 @@ const PR_TASK_PERF_EVENTS_ENABLE = Cint(32)
res = Base.llvmcall("""%val = call i32 asm sideeffect "swi 0", "={r0},{r7},{r0},~{memory}"(i32 %0, i32 %1)
ret i32 %val""", Int32, Tuple{Int32, Int32}, SYS_prctl, Int32(op))
return (res >= 0) ? nothing : throw(Base.SystemError("prctl", -res, nothing))
elseif Sys.ARCH === :riscv64 || Sys.ARCH === :rv64
res = Base.llvmcall("""%val = call i64 asm sideeffect "ecall", "={a0},{a7},{a0},~{memory}"(i64 %0, i64 %1)
ret i64 %val""", Int64, Tuple{Int64, Int64}, SYS_prctl, Int64(op))
return (res >= 0) ? nothing : throw(Base.SystemError("prctl", -res, nothing))
else
# syscall is lower overhead than calling libc's prctl
res = ccall(:syscall, Cint, (Clong, Clong...), SYS_prctl, op)
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