26 lines
662 B
C
26 lines
662 B
C
#include <sys/cdefs.h>
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#include "namespace.h"
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#include <lib.h>
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#include <string.h>
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#include <sys/ptrace.h>
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int ptrace(int req, pid_t pid, void *addr, int data)
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{
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message m;
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memset(&m, 0, sizeof(m));
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m.m_lc_pm_ptrace.pid = pid;
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m.m_lc_pm_ptrace.req = req;
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m.m_lc_pm_ptrace.addr = (vir_bytes)addr;
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m.m_lc_pm_ptrace.data = data;
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if (_syscall(PM_PROC_NR, PM_PTRACE, &m) < 0) return(-1);
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/* There was no error, but -1 is a legal return value. Clear errno if
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* necessary to distinguish this case. _syscall has set errno to nonzero
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* for the error case.
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*/
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if (m.m_pm_lc_ptrace.data == -1) errno = 0;
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return(m.m_pm_lc_ptrace.data);
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}
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