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syscall: implement Ptrace{Set,Get}Regs using PTRACE_{GET,SET}REGSET on all linux platforms

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In the ptrace system call, most of the newer architectures (e.g. arm64,riscv64,loong64)
do not provide support for the command PTRACE_{GET, SET}REGS.

The Linux kernel 2.6.33-rc7[1] introduces support for the command PTRACE_{GET,SET}REGSET,
which exports different types of register sets depending on the NT_* types, completely
overriding the functionality provided by PTRACE_{GET,SET}REGS.

[1] https://lore.kernel.org/all/20100211195614.886724710@sbs-t61.sc.intel.com/

Fixes #60679.

Change-Id: I8c2671d64a7ecd654834740f4f1e1e50c00edcae
Reviewed-on: https://go-review.googlesource.com/c/go/+/501756
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: David Chase <drchase@google.com>
Run-TryBot: Ian Lance Taylor <iant@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
This commit is contained in:
chenguoqi 2023-06-08 14:04:26 +08:00 committed by Gopher Robot
parent 82dc37c0d0
commit fafa4091ab
1 changed files with 12 additions and 2 deletions
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14
src/syscall/syscall_linux.go
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@ -936,12 +936,22 @@ func PtracePokeData(pid int, addr uintptr, data []byte) (count int, err error) {
return ptracePoke(PTRACE_POKEDATA, PTRACE_PEEKDATA, pid, addr, data)
}
const (
_NT_PRSTATUS = 1
)
func PtraceGetRegs(pid int, regsout *PtraceRegs) (err error) {
return ptracePtr(PTRACE_GETREGS, pid, 0, unsafe.Pointer(regsout))
var iov Iovec
iov.Base = (*byte)(unsafe.Pointer(regsout))
iov.SetLen(int(unsafe.Sizeof(*regsout)))
return ptracePtr(PTRACE_GETREGSET, pid, uintptr(_NT_PRSTATUS), unsafe.Pointer(&iov))
}
func PtraceSetRegs(pid int, regs *PtraceRegs) (err error) {
return ptracePtr(PTRACE_SETREGS, pid, 0, unsafe.Pointer(regs))
var iov Iovec
iov.Base = (*byte)(unsafe.Pointer(regs))
iov.SetLen(int(unsafe.Sizeof(*regs)))
return ptracePtr(PTRACE_SETREGSET, pid, uintptr(_NT_PRSTATUS), unsafe.Pointer(&iov))
}
func PtraceSetOptions(pid int, options int) (err error) {