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package/libopenssl: fix build on riscv32

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riscv32 is (surprise!) a 32-bit architecture. But it has been Y2038-safe
from its inception. As such, there are no legacy binaries that may use
the 32-bit time syscalls, and thus they are not available on riscv32.

Code that directly calls to the syscalls without using the C libraries
wrappers thus need to handle this case by themselves.

Backport a patch from the upstream openssl development branch that will
eventually be openssl 3.0, but has not yet been backported to the 1.1.1
stable branch.

Fixes:
    http://autobuild.buildroot.org/results/eb9/eb9a64d4ffae8569b5225083f282cf87ffa7c681/
    ...
    http://autobuild.buildroot.org/results/07e/07e413b24ba8adc9558c80267ce16dda339bf032/

Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
Cc: Matt Weber <matthew.weber@rockwellcollins.com>
Cc: Mark Corbin <mark@dibsco.co.uk>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
This commit is contained in:
Yann E. MORIN 2021-03-02 22:51:47 +01:00 committed by Arnout Vandecappelle (Essensium/Mind)
parent a0aff89ed2
commit 2bb26c1a1d
1 changed files with 63 additions and 0 deletions
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63
package/libopenssl/0006-Add-support-for-io_pgetevents_time64-syscall.patch Normal file
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@ -0,0 +1,63 @@
From 5b5e2985f355c8e99c196d9ce5d02c15bebadfbc Mon Sep 17 00:00:00 2001
From: Alistair Francis <alistair.francis@wdc.com>
Date: Thu, 29 Aug 2019 13:56:21 -0700
Subject: [PATCH] Add support for io_pgetevents_time64 syscall
32-bit architectures that are y2038 safe don't include syscalls that use
32-bit time_t. Instead these architectures have suffixed syscalls that
always use a 64-bit time_t. In the case of the io_getevents syscall the
syscall has been replaced with the io_pgetevents_time64 syscall instead.
This patch changes the io_getevents() function to use the correct
syscall based on the avaliable syscalls and the time_t size. We will
only use the new 64-bit time_t syscall if the architecture is using a
64-bit time_t. This is to avoid having to deal with 32/64-bit
conversions and relying on a 64-bit timespec struct on 32-bit time_t
platforms. As of Linux 5.3 there are no 32-bit time_t architectures
without __NR_io_getevents. In the future if a 32-bit time_t architecture
wants to use the 64-bit syscalls we can handle the conversion.
This fixes build failures on 32-bit RISC-V.
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Richard Levitte <levitte@openssl.org>
Reviewed-by: Paul Dale <paul.dale@oracle.com>
(Merged from https://github.com/openssl/openssl/pull/9819)
[yann.morin.1998@free.fr: backport from upstream 3.0 branch]
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
---
engines/e_afalg.c | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
diff --git a/engines/e_afalg.c b/engines/e_afalg.c
index dacbe358cb..99516cb1bb 100644
--- a/engines/e_afalg.c
+++ b/engines/e_afalg.c
@@ -125,7 +125,23 @@ static ossl_inline int io_getevents(aio_context_t ctx, long min, long max,
struct io_event *events,
struct timespec *timeout)
{
+#if defined(__NR_io_getevents)
return syscall(__NR_io_getevents, ctx, min, max, events, timeout);
+#elif defined(__NR_io_pgetevents_time64)
+ /* Let's only support the 64 suffix syscalls for 64-bit time_t.
+ * This simplifies the code for us as we don't need to use a 64-bit
+ * version of timespec with a 32-bit time_t and handle converting
+ * between 64-bit and 32-bit times and check for overflows.
+ */
+ if (sizeof(timeout->tv_sec) == 8)
+ return syscall(__NR_io_pgetevents_time64, ctx, min, max, events, timeout, NULL);
+ else {
+ errno = ENOSYS;
+ return -1;
+ }
+#else
+# error "We require either the io_getevents syscall or __NR_io_pgetevents_time64."
+#endif
}
static void afalg_waitfd_cleanup(ASYNC_WAIT_CTX *ctx, const void *key,
--
2.25.1