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Add getregs()/setregs()/getregset()/setregset() for Linux/musl/aarch64 #2502

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merged 4 commits into from
Sep 15, 2024
Merged

Add getregs()/setregs()/getregset()/setregset() for Linux/musl/aarch64 #2502

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eb6acf0
Support getregs() for aarch64-unknown-linux-musl
orhun Sep 14, 2024
3ae812d
Expand the scope of Linux/musl/aarch64 implementation
orhun Sep 14, 2024
f803e83
Enable tests
orhun Sep 14, 2024
cd2ff4a
Simplifiy arch condition
orhun Sep 14, 2024
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1 change: 1 addition & 0 deletions changelog/2502.added.md
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Original file line number Diff line number Diff line change
@@ -0,0 +1 @@
Add `getregs()`/`getregset()`/`setregset()` for Linux/musl/aarch64
51 changes: 35 additions & 16 deletions src/sys/ptrace/linux.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -14,11 +14,10 @@ pub type AddressType = *mut ::libc::c_void;
target_os = "linux",
any(
all(
target_arch = "x86_64",
any(target_arch = "x86_64", target_arch = "aarch64"),
any(target_env = "gnu", target_env = "musl")
),
all(target_arch = "x86", target_env = "gnu"),
all(target_arch = "aarch64", target_env = "gnu"),
all(target_arch = "riscv64", target_env = "gnu"),
),
))]
Expand Down Expand Up @@ -334,8 +333,13 @@ pub fn getregs(pid: Pid) -> Result<user_regs_struct> {
/// [ptrace(2)]: https://www.man7.org/linux/man-pages/man2/ptrace.2.html
#[cfg(all(
target_os = "linux",
target_env = "gnu",
any(target_arch = "aarch64", target_arch = "riscv64")
any(
all(
target_arch = "aarch64",
any(target_env = "gnu", target_env = "musl")
),
all(target_arch = "riscv64", target_env = "gnu")
)
))]
pub fn getregs(pid: Pid) -> Result<user_regs_struct> {
getregset::<regset::NT_PRSTATUS>(pid)
Expand All @@ -344,12 +348,17 @@ pub fn getregs(pid: Pid) -> Result<user_regs_struct> {
/// Get a particular set of user registers, as with `ptrace(PTRACE_GETREGSET, ...)`
#[cfg(all(
target_os = "linux",
target_env = "gnu",
any(
target_arch = "x86_64",
target_arch = "x86",
target_arch = "aarch64",
target_arch = "riscv64",
all(
target_env = "gnu",
any(
target_arch = "x86_64",
target_arch = "x86",
target_arch = "aarch64",
target_arch = "riscv64"
)
),
all(target_env = "musl", target_arch = "aarch64")
)
))]
pub fn getregset<S: RegisterSet>(pid: Pid) -> Result<S::Regs> {
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@SteveLauC SteveLauC Sep 22, 2024 •
edited
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We forgot to enable the RegisterSet trait and enum RegisterSetValue for linux/aarch64/musl in this PR, I found this while reviewing #2507, the CI does not catch it as well because we don't have CI for this triple:<

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I added support for aarch64-unknown-linux-musl for getregs() function and it builds fine now, but I don't have a way to test it.

I am kinda surprised that Rust does not catch this at compile time. 🤔

@orhun, could you please give this a fix and if possible, give this a try with lurk?

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I try to fix this issue and add the CI for aarch64/musl in #2510, but it looks like the constants needed by enum RegisterSetValue have not been defined in the libc crate, so we need to add them there first.

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PR filed rust-lang/libc#3938

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Ah damn, good catch, these arch stuff goes deep!

Do you want me to test it out with lurk? Is there any other thing that I can help here?

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these arch stuff goes deep!

Exactly 😪

Do you want me to test it out with lurk?

Yeah, that would be great! Once #2510 is merged, we can start the test:)

Is there any other thing that I can help here?

Currently, no, I may ping you when I do need you 😁

Expand Down Expand Up @@ -408,8 +417,13 @@ pub fn setregs(pid: Pid, regs: user_regs_struct) -> Result<()> {
/// [ptrace(2)]: https://www.man7.org/linux/man-pages/man2/ptrace.2.html
#[cfg(all(
target_os = "linux",
target_env = "gnu",
any(target_arch = "aarch64", target_arch = "riscv64")
any(
all(
target_env = "gnu",
any(target_arch = "aarch64", target_arch = "riscv64")
),
all(target_env = "musl", target_arch = "aarch64")
)
))]
pub fn setregs(pid: Pid, regs: user_regs_struct) -> Result<()> {
setregset::<regset::NT_PRSTATUS>(pid, regs)
Expand All @@ -418,12 +432,17 @@ pub fn setregs(pid: Pid, regs: user_regs_struct) -> Result<()> {
/// Set a particular set of user registers, as with `ptrace(PTRACE_SETREGSET, ...)`
#[cfg(all(
target_os = "linux",
target_env = "gnu",
any(
target_arch = "x86_64",
target_arch = "x86",
target_arch = "aarch64",
target_arch = "riscv64",
all(
target_env = "gnu",
any(
target_arch = "x86_64",
target_arch = "x86",
target_arch = "aarch64",
target_arch = "riscv64"
)
),
all(target_env = "musl", target_arch = "aarch64")
)
))]
pub fn setregset<S: RegisterSet>(pid: Pid, mut regs: S::Regs) -> Result<()> {
Expand Down
15 changes: 10 additions & 5 deletions test/sys/test_ptrace.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -292,12 +292,17 @@ fn test_ptrace_syscall() {

#[cfg(all(
target_os = "linux",
target_env = "gnu",
any(
target_arch = "x86_64",
target_arch = "x86",
target_arch = "aarch64",
target_arch = "riscv64",
all(
target_env = "gnu",
any(
target_arch = "x86_64",
target_arch = "x86",
target_arch = "aarch64",
target_arch = "riscv64"
)
),
all(target_env = "musl", target_arch = "aarch64")
)
))]
#[test]
Expand Down