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70 lines
2.4 KiB
70 lines
2.4 KiB
2 years ago
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Very limited backport of the following upstream commit, to obtain
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the definition of __getrandom_nocancel.
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commit 6f4e0fcfa2d2b0915816a3a3a1d48b4763a7dee2
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Author: Adhemerval Zanella Netto <adhemerval.zanella@linaro.org>
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Date: Thu Jul 21 10:04:59 2022 -0300
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stdlib: Add arc4random, arc4random_buf, and arc4random_uniform (BZ #4417)
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With the INTERNAL_SYSCALL_CALL change from this patch already applied:
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commit 609c9d0951da387cd523b5db42a82d38dabc37c4
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Author: Adhemerval Zanella <adhemerval.zanella@linaro.org>
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Date: Thu Sep 29 16:18:06 2022 -0300
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malloc: Do not clobber errno on __getrandom_nocancel (BZ #29624)
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Use INTERNAL_SYSCALL_CALL instead of INLINE_SYSCALL_CALL. This
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requires emulate the semantic for hurd call (so __arc4random_buf
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uses the fallback).
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Checked on x86_64-linux-gnu.
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Reviewed-by: Wilco Dijkstra <Wilco.Dijkstra@arm.com>
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diff --git a/sysdeps/generic/not-cancel.h b/sysdeps/generic/not-cancel.h
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index 8a3772a1fe66271e..14188041c2c0ad57 100644
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--- a/sysdeps/generic/not-cancel.h
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+++ b/sysdeps/generic/not-cancel.h
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@@ -49,5 +49,7 @@
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(void) __writev (fd, iov, n)
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#define __fcntl64_nocancel(fd, cmd, ...) \
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__fcntl64 (fd, cmd, __VA_ARGS__)
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+#define __getrandom_nocancel(buf, size, flags) \
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+ __getrandom (buf, size, flags)
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#endif /* NOT_CANCEL_H */
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diff --git a/sysdeps/mach/hurd/not-cancel.h b/sysdeps/mach/hurd/not-cancel.h
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index cd320cb721e6ff7e..7a3d2cc3532cf866 100644
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--- a/sysdeps/mach/hurd/not-cancel.h
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+++ b/sysdeps/mach/hurd/not-cancel.h
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@@ -75,6 +75,9 @@ __typeof (__fcntl) __fcntl_nocancel;
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#define __fcntl64_nocancel(...) \
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__fcntl_nocancel (__VA_ARGS__)
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+#define __getrandom_nocancel(buf, size, flags) \
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+ __getrandom (buf, size, flags)
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+
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#if IS_IN (libc)
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hidden_proto (__close_nocancel)
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hidden_proto (__close_nocancel_nostatus)
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diff --git a/sysdeps/unix/sysv/linux/not-cancel.h b/sysdeps/unix/sysv/linux/not-cancel.h
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index f06d57426a40227e..d2bb59acddbcfee0 100644
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--- a/sysdeps/unix/sysv/linux/not-cancel.h
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+++ b/sysdeps/unix/sysv/linux/not-cancel.h
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@@ -68,6 +68,13 @@ __writev_nocancel_nostatus (int fd, const struct iovec *iov, int iovcnt)
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INTERNAL_SYSCALL_CALL (writev, fd, iov, iovcnt);
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}
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+static inline int
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+__getrandom_nocancel (void *buf, size_t buflen, unsigned int flags)
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+{
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+ return INTERNAL_SYSCALL_CALL (getrandom, buf, buflen, flags);
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+}
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+
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+
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/* Uncancelable fcntl. */
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__typeof (__fcntl) __fcntl64_nocancel;
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