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Matheus
26 lines
524 B
C
26 lines
524 B
C
#include <kernel/syscalls.h>
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#include <arch/cpu.h>
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syscallret_t syscall_sigaltstack(context_t *, stack_t *new, stack_t *old) {
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syscallret_t ret = {
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.ret = -1
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};
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stack_t newtmp, oldtmp;
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if (new && usercopy_fromuser(&newtmp, new, sizeof(stack_t))) {
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ret.errno = EFAULT;
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return ret;
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}
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signal_altstack(current_thread(), new ? &newtmp : NULL, old ? &oldtmp : NULL);
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if (old && usercopy_touser(old, &oldtmp, sizeof(stack_t))) {
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ret.errno = EFAULT;
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return ret;
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}
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ret.errno = 0;
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ret.ret = 0;
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return ret;
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}
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