51 lines
1.4 KiB
C
51 lines
1.4 KiB
C
/* The kernel call implemented in this file:
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* m_type: SYS_SYSCTL
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*
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* The parameters for this kernel call are:
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* SYSCTL_CODE request
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* and then request-specific arguments in SYSCTL_ARG1 and SYSCTL_ARG2.
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*/
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#include "kernel/system.h"
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/*===========================================================================*
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* do_sysctl *
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*===========================================================================*/
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int do_sysctl(struct proc * caller, message * m_ptr)
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{
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vir_bytes len, buf;
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static char mybuf[DIAG_BUFSIZE];
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int s, i, proc_nr;
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switch (m_ptr->SYSCTL_CODE) {
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case SYSCTL_CODE_DIAG:
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buf = (vir_bytes) m_ptr->SYSCTL_ARG1;
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len = (vir_bytes) m_ptr->SYSCTL_ARG2;
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if(len < 1 || len > DIAG_BUFSIZE) {
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printf("do_sysctl: diag for %d: len %d out of range\n",
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caller->p_endpoint, len);
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return EINVAL;
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}
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if((s=data_copy_vmcheck(caller, caller->p_endpoint, buf, KERNEL,
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(vir_bytes) mybuf, len)) != OK) {
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printf("do_sysctl: diag for %d: len %d: copy failed: %d\n",
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caller->p_endpoint, len, s);
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return s;
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}
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for(i = 0; i < len; i++)
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kputc(mybuf[i]);
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kputc(END_OF_KMESS);
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return OK;
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case SYSCTL_CODE_STACKTRACE:
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if(!isokendpt(m_ptr->SYSCTL_ARG2, &proc_nr))
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return EINVAL;
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proc_stacktrace(proc_addr(proc_nr));
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return OK;
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default:
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printf("do_sysctl: invalid request %d\n", m_ptr->SYSCTL_CODE);
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return(EINVAL);
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}
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}
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