openssl: Enable building for RISC-V 32-bit

Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 99 insertions, 0 deletions

diff --git a/meta/recipes-connectivity/openssl/openssl/0004-Fixup-support-for-io_pgetevents_time64-syscall.patch b/meta/recipes-connectivity/openssl/openssl/0004-Fixup-support-for-io_pgetevents_time64-syscall.patch
new file mode 100644
index 0000000000..c8bc6f5c68
--- /dev/null
+++ b/meta/recipes-connectivity/openssl/openssl/0004-Fixup-support-for-io_pgetevents_time64-syscall.patch
@@ -0,0 +1,99 @@
+From e5499a3cac1e823c3e0697e8667e952317b70cc8 Mon Sep 17 00:00:00 2001
+From: Alistair Francis <alistair.francis@wdc.com>
+Date: Thu, 4 Mar 2021 12:10:11 -0500
+Subject: [PATCH] Fixup support for io_pgetevents_time64 syscall
+
+This is a fixup for the original commit 5b5e2985f355c8e99c196d9ce5d02c15bebadfbc
+"Add support for io_pgetevents_time64 syscall" that didn't correctly
+work for 32-bit architecutres with a 64-bit time_t that aren't RISC-V.
+
+For a full discussion of the issue see:
+https://github.com/openssl/openssl/commit/5b5e2985f355c8e99c196d9ce5d02c15bebadfbc
+
+Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
+
+Reviewed-by: Tomas Mraz <tomas@openssl.org>
+Reviewed-by: Paul Dale <pauli@openssl.org>
+(Merged from https://github.com/openssl/openssl/pull/14432)
+Upstream-Status: Accepted
+---
+ engines/e_afalg.c | 55 ++++++++++++++++++++++++++++++++++++-----------
+ 1 file changed, 42 insertions(+), 13 deletions(-)
+
+diff --git a/engines/e_afalg.c b/engines/e_afalg.c
+index 9480d7c24b..4e9d67db2d 100644
+--- a/engines/e_afalg.c
++++ b/engines/e_afalg.c
+@@ -124,27 +124,56 @@ static ossl_inline int io_read(aio_context_t ctx, long n, struct iocb **iocb)
+     return syscall(__NR_io_submit, ctx, n, iocb);
+ }
+ 
++/* A version of 'struct timespec' with 32-bit time_t and nanoseconds.  */
++struct __timespec32
++{
++  __kernel_long_t tv_sec;
++  __kernel_long_t tv_nsec;
++};
++
+ 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_pgetevents_time64)
++    /* Check if we are a 32-bit architecture with a 64-bit time_t */
++    if (sizeof(*timeout) != sizeof(struct __timespec32)) {
++        int ret = syscall(__NR_io_pgetevents_time64, ctx, min, max, events,
++                          timeout, NULL);
++        if (ret == 0 || errno != ENOSYS)
++            return ret;
++    }
++#endif
++
+ #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);
++    if (sizeof(*timeout) == sizeof(struct __timespec32))
++        /*
++         * time_t matches our architecture length, we can just use
++         * __NR_io_getevents
++         */
++        return syscall(__NR_io_getevents, ctx, min, max, events, timeout);
+     else {
+-        errno = ENOSYS;
+-        return -1;
++        /*
++         * We don't have __NR_io_pgetevents_time64, but we are using a
++         * 64-bit time_t on a 32-bit architecture. If we can fit the
++         * timeout value in a 32-bit time_t, then let's do that
++         * and then use the __NR_io_getevents syscall.
++         */
++        if (timeout && timeout->tv_sec == (long)timeout->tv_sec) {
++            struct __timespec32 ts32;
++
++            ts32.tv_sec = (__kernel_long_t) timeout->tv_sec;
++            ts32.tv_nsec = (__kernel_long_t) timeout->tv_nsec;
++
++            return syscall(__NR_io_getevents, ctx, min, max, events, ts32);
++        } else {
++            return syscall(__NR_io_getevents, ctx, min, max, events, NULL);
++        }
+     }
+-#else
+-# error "We require either the io_getevents syscall or __NR_io_pgetevents_time64."
+ #endif
++
++    errno = ENOSYS;
++    return -1;
+ }
+ 
+ static void afalg_waitfd_cleanup(ASYNC_WAIT_CTX *ctx, const void *key,
+-- 
+2.30.1
+