OBS-URL: https://build.opensuse.org/package/show/devel:libraries:c_c++/json-c?expand=0&rev=38

0001-Detect-broken-RDRAND-during-initialization.patch

@@ -1,131 +0,0 @@
-From eec4df641cbce416c86f2e7d6c740d85b8906451 Mon Sep 17 00:00:00 2001
-From: =?UTF-8?q?Bj=C3=B6rn=20Esser?= <besser82@fedoraproject.org>
-Date: Mon, 25 May 2020 13:03:31 +0200
-Subject: [PATCH] Detect broken RDRAND during initialization.
-
-Some CPUs advertise RDRAND in CPUID, but return
-0xFFFFFFFF unconditionally.  To avoid locking up
-later, test RDRAND during initialization, and if
-it returns 0xFFFFFFFF, mark it as nonexistent.
-
-Also fix a possible segmentation fault in CPUID check.
-
-This commit is a squashed backport of the following
-commits on the master branch:
-
-  * 0e5bbcaa162ac7850eb4fcd8f91391837d0efb50
-  * 4d36b0287d3ab0912ba8a4790340ca099960b2b0
-  * 80863140263be5f2dc630938ed8f0066f8a1ab43
----
- random_seed.c | 66 ++++++++++++++++++++++++++++++++++++++-------------
- 1 file changed, 49 insertions(+), 17 deletions(-)
-
-diff --git a/random_seed.c b/random_seed.c
-index fc19e26d13..b5f8a0795e 100644
---- a/random_seed.c
-+++ b/random_seed.c
-@@ -26,19 +26,8 @@
- static void do_cpuid(int regs[], int h)
- {
- 	/* clang-format off */
--    __asm__ __volatile__(
--#if defined __x86_64__
--                         "pushq %%rbx;\n"
--#else
--                         "pushl %%ebx;\n"
--#endif
--                         "cpuid;\n"
--#if defined __x86_64__
--                         "popq %%rbx;\n"
--#else
--                         "popl %%ebx;\n"
--#endif
--                         : "=a"(regs[0]), [ebx] "=r"(regs[1]), "=c"(regs[2]), "=d"(regs[3])
-+    __asm__ __volatile__("cpuid"
-+                         : "=a"(regs[0]), "=b"(regs[1]), "=c"(regs[2]), "=d"(regs[3])
-                          : "a"(h));
- 	/* clang-format on */
- }
-@@ -54,12 +43,51 @@ static void do_cpuid(int regs[], int h)
- 
- #if HAS_X86_CPUID
- 
-+static int get_rdrand_seed(void);
-+
-+/* Valid values are -1 (haven't tested), 0 (no), and 1 (yes). */
-+static int _has_rdrand = -1;
-+
- static int has_rdrand(void)
- {
--	// CPUID.01H:ECX.RDRAND[bit 30] == 1
-+	if (_has_rdrand != -1)
-+	{
-+		return _has_rdrand;
-+	}
-+
-+	/* CPUID.01H:ECX.RDRAND[bit 30] == 1 */
- 	int regs[4];
- 	do_cpuid(regs, 1);
--	return (regs[2] & (1 << 30)) != 0;
-+	if (!(regs[2] & (1 << 30)))
-+	{
-+		_has_rdrand = 0;
-+		return 0;
-+	}
-+
-+	/*
-+	 * Some CPUs advertise RDRAND in CPUID, but return 0xFFFFFFFF
-+	 * unconditionally. To avoid locking up later, test RDRAND here. If over
-+	 * 3 trials RDRAND has returned the same value, declare it broken.
-+	 * Example CPUs are AMD Ryzen 3000 series
-+	 * and much older AMD APUs, such as the E1-1500
-+	 * https://github.com/systemd/systemd/issues/11810
-+	 * https://linuxreviews.org/RDRAND_stops_returning_random_values_on_older_AMD_CPUs_after_suspend
-+	 */
-+	_has_rdrand = 0;
-+	int prev = get_rdrand_seed();
-+	for (int i = 0; i < 3; i++)
-+	{
-+		int temp = get_rdrand_seed();
-+		if (temp != prev)
-+		{
-+			_has_rdrand = 1;
-+			break;
-+		}
-+
-+		prev = temp;
-+	}
-+
-+	return _has_rdrand;
- }
- 
- #endif
-@@ -74,7 +102,7 @@ static int get_rdrand_seed(void)
- {
- 	DEBUG_SEED("get_rdrand_seed");
- 	int _eax;
--	// rdrand eax
-+	/* rdrand eax */
- 	/* clang-format off */
- 	__asm__ __volatile__("1: .byte 0x0F\n"
- 	                     "   .byte 0xC7\n"
-@@ -114,7 +142,7 @@ static int get_rdrand_seed(void)
- 	DEBUG_SEED("get_rdrand_seed");
- 	int _eax;
- retry:
--	// rdrand eax
-+	/* rdrand eax */
- 	__asm _emit 0x0F __asm _emit 0xC7 __asm _emit 0xF0
- 	__asm jnc retry
- 	__asm mov _eax, eax
-@@ -188,6 +216,10 @@ static int get_dev_random_seed(void)
- 
- /* clang-format off */
- #include <windows.h>
-+
-+/* Caution: these blank lines must remain so clang-format doesn't reorder
-+   includes to put windows.h after wincrypt.h */
-+
- #include <wincrypt.h>
- /* clang-format on */
- #ifndef __GNUC__