dev-libs/openssl: Fix build on riscv32

Patch is backport from openssl master; ack'ed by Whissi

Package-Manager: Portage-3.0.9, Repoman-3.0.2
Signed-off-by: Andreas K. Hüttel <dilfridge@gentoo.org>

2 files changed, 62 insertions, 0 deletions

diff --git a/dev-libs/openssl/files/openssl-1.1.1i-riscv32.patch b/dev-libs/openssl/files/openssl-1.1.1i-riscv32.patch
new file mode 100644
index 000000000000..c94b0323eb43
--- /dev/null
+++ b/dev-libs/openssl/files/openssl-1.1.1i-riscv32.patch
@@ -0,0 +1,61 @@
+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)
+---
+ 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,
+-- 
+2.26.2
+
diff --git a/dev-libs/openssl/openssl-1.1.1i.ebuild b/dev-libs/openssl/openssl-1.1.1i.ebuild
index 7d5fc56e026b..6c86f655c996 100644
--- a/dev-libs/openssl/openssl-1.1.1i.ebuild
+++ b/dev-libs/openssl/openssl-1.1.1i.ebuild
@@ -47,6 +47,7 @@ PDEPEND="app-misc/ca-certificates"
 
 PATCHES=(
 	"${FILESDIR}"/${PN}-1.1.0j-parallel_install_fix.patch #671602
+	"${FILESDIR}"/${PN}-1.1.1i-riscv32.patch
 )
 
 S="${WORKDIR}/${MY_P}"