Implement PTRACE_GETSIGINFO. This makes Linux strace(1) quieter
in some cases (strace -f man id > /dev/null). Reviewed by: dchagin MFC after: 2 weeks Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D20691
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parent
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Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=349747
@ -68,6 +68,7 @@ __FBSDID("$FreeBSD$");
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#define LINUX_PTRACE_DETACH 17
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#define LINUX_PTRACE_SYSCALL 24
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#define LINUX_PTRACE_SETOPTIONS 0x4200
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#define LINUX_PTRACE_GETSIGINFO 0x4202
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#define LINUX_PTRACE_GETREGSET 0x4204
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#define LINUX_PTRACE_SEIZE 0x4206
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@ -366,6 +367,31 @@ linux_ptrace_setoptions(struct thread *td, pid_t pid, l_ulong data)
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return (kern_ptrace(td, PT_SET_EVENT_MASK, pid, &mask, sizeof(mask)));
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}
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static int
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linux_ptrace_getsiginfo(struct thread *td, pid_t pid, l_ulong data)
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{
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struct ptrace_lwpinfo lwpinfo;
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l_siginfo_t l_siginfo;
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int error, sig;
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error = kern_ptrace(td, PT_LWPINFO, pid, &lwpinfo, sizeof(lwpinfo));
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if (error != 0) {
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linux_msg(td, "PT_LWPINFO failed with error %d", error);
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return (error);
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}
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if ((lwpinfo.pl_flags & PL_FLAG_SI) == 0) {
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error = EINVAL;
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linux_msg(td, "no PL_FLAG_SI, returning %d", error);
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return (error);
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}
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sig = bsd_to_linux_signal(lwpinfo.pl_siginfo.si_signo);
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siginfo_to_lsiginfo(&lwpinfo.pl_siginfo, &l_siginfo, sig);
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error = copyout(&l_siginfo, (void *)data, sizeof(l_siginfo));
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return (error);
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}
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static int
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linux_ptrace_getregs(struct thread *td, pid_t pid, void *data)
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{
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@ -580,6 +606,9 @@ linux_ptrace(struct thread *td, struct linux_ptrace_args *uap)
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case LINUX_PTRACE_SETOPTIONS:
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error = linux_ptrace_setoptions(td, pid, uap->data);
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break;
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case LINUX_PTRACE_GETSIGINFO:
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error = linux_ptrace_getsiginfo(td, pid, uap->data);
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break;
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case LINUX_PTRACE_GETREGSET:
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error = linux_ptrace_getregset(td, pid, uap->addr, uap->data);
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break;
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