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authorAnton Gerasimov <anton@advancedtelematic.com>2016-08-29 15:03:08 +0200
committerAnton Gerasimov <anton@advancedtelematic.com>2016-08-29 15:05:06 +0200
commitec0d7ed531c13035a4ec2d6ff30a8cf364fc6b9e (patch)
treedf9a8597c474b8ce630ac238d9f565fdb63177cc /recipes-bsp/u-boot/u-boot-ota/0002-Replace-wraps-with-built-in-code-to-remove-dependenc.patch
parent081b8be83fd8dd718ea8feb7e3cd6baea271032b (diff)
downloadmeta-updater-ec0d7ed531c13035a4ec2d6ff30a8cf364fc6b9e.tar.gz
Replaced links to libgcc functions for 64-bit integer divisions with
ipxe implementation to get rid of multilib Bug-AGL: SPEC-242 Change-Id: I43589a295fd1e499c03c0ff77f04f9af7f1518b0 Signed-off-by: Anton Gerasimov <anton@advancedtelematic.com>
Diffstat (limited to 'recipes-bsp/u-boot/u-boot-ota/0002-Replace-wraps-with-built-in-code-to-remove-dependenc.patch')
-rw-r--r--recipes-bsp/u-boot/u-boot-ota/0002-Replace-wraps-with-built-in-code-to-remove-dependenc.patch141
1 files changed, 141 insertions, 0 deletions
diff --git a/recipes-bsp/u-boot/u-boot-ota/0002-Replace-wraps-with-built-in-code-to-remove-dependenc.patch b/recipes-bsp/u-boot/u-boot-ota/0002-Replace-wraps-with-built-in-code-to-remove-dependenc.patch
new file mode 100644
index 0000000..83e223f
--- /dev/null
+++ b/recipes-bsp/u-boot/u-boot-ota/0002-Replace-wraps-with-built-in-code-to-remove-dependenc.patch
@@ -0,0 +1,141 @@
1From d5bea58bf85522a289194d59dfab00207ffdfb4f Mon Sep 17 00:00:00 2001
2From: Anton Gerasimov <anton@advancedtelematic.com>
3Date: Fri, 26 Aug 2016 13:51:30 +0200
4Subject: [PATCH 2/2] Replace wraps with built-in code to remove dependency on
5 multilib
6
7---
8 arch/x86/config.mk | 3 --
9 arch/x86/lib/gcc.c | 97 +++++++++++++++++++++++++++++++++++++++++++++++-------
10 2 files changed, 86 insertions(+), 14 deletions(-)
11
12diff --git a/arch/x86/config.mk b/arch/x86/config.mk
13index d7addd8..892e0fc 100644
14--- a/arch/x86/config.mk
15+++ b/arch/x86/config.mk
16@@ -21,9 +21,6 @@ PLATFORM_RELFLAGS += -ffunction-sections -fvisibility=hidden
17
18 PLATFORM_LDFLAGS += -Bsymbolic -Bsymbolic-functions -m elf_i386
19
20-LDFLAGS_FINAL += --wrap=__divdi3 --wrap=__udivdi3
21-LDFLAGS_FINAL += --wrap=__moddi3 --wrap=__umoddi3
22-
23 # This is used in the top-level Makefile which does not include
24 # PLATFORM_LDFLAGS
25 LDFLAGS_EFI_PAYLOAD := -Bsymbolic -Bsymbolic-functions -shared --no-undefined
26diff --git a/arch/x86/lib/gcc.c b/arch/x86/lib/gcc.c
27index 3c70d79..6b47785 100644
28--- a/arch/x86/lib/gcc.c
29+++ b/arch/x86/lib/gcc.c
30@@ -8,22 +8,97 @@
31
32 #ifdef __GNUC__
33
34+#include <stdint.h>
35+#include <stddef.h>
36 /*
37 * GCC's libgcc handling is quite broken. While the libgcc functions
38 * are always regparm(0) the code that calls them uses whatever the
39 * compiler call specifies. Therefore we need a wrapper around those
40 * functions. See gcc bug PR41055 for more information.
41 */
42-#define WRAP_LIBGCC_CALL(type, name) \
43- type __normal_##name(type a, type b) __attribute__((regparm(0))); \
44- type __wrap_##name(type a, type b); \
45- type __attribute__((no_instrument_function)) \
46- __wrap_##name(type a, type b) \
47- { return __normal_##name(a, b); }
48-
49-WRAP_LIBGCC_CALL(long long, __divdi3)
50-WRAP_LIBGCC_CALL(unsigned long long, __udivdi3)
51-WRAP_LIBGCC_CALL(long long, __moddi3)
52-WRAP_LIBGCC_CALL(unsigned long long, __umoddi3)
53+uint64_t __udivmoddi4 ( uint64_t num,
54+ uint64_t den,
55+ uint64_t *rem_p )
56+{
57+ uint64_t quot = 0, qbit = 1;
58+
59+ if ( den == 0 ) {
60+ return 1/((unsigned)den); /* Intentional divide by zero, without
61+ triggering a compiler warning which
62+ would abort the build */
63+ }
64+
65+ /* Left-justify denominator and count shift */
66+ while ( (int64_t)den >= 0 ) {
67+ den <<= 1;
68+ qbit <<= 1;
69+ }
70+
71+ while ( qbit ) {
72+ if ( den <= num ) {
73+ num -= den;
74+ quot += qbit;
75+ }
76+ den >>= 1;
77+ qbit >>= 1;
78+ }
79+
80+ if ( rem_p )
81+ *rem_p = num;
82+
83+ return quot;
84+}
85+
86+uint64_t __udivdi3( uint64_t num, uint64_t den )
87+{
88+ return __udivmoddi4(num, den, NULL);
89+}
90+
91+uint64_t __umoddi3 ( uint64_t num, uint64_t den )
92+{
93+ uint64_t v;
94+
95+ (void) __udivmoddi4(num, den, &v);
96+ return v;
97+}
98+
99+int64_t __divmoddi4 ( int64_t num,
100+ int64_t den,
101+ int64_t* rem_p )
102+{
103+ int minus = 0;
104+ int64_t v;
105+
106+ if ( num < 0 ) {
107+ num = -num;
108+ minus = 1;
109+ }
110+ if ( den < 0 ) {
111+ den = -den;
112+ minus ^= 1;
113+ }
114+
115+ v = __udivmoddi4(num, den, (uint64_t *)rem_p);
116+ if ( minus ) {
117+ v = -v;
118+ if ( rem_p )
119+ *rem_p = -(*rem_p);
120+ }
121+
122+ return v;
123+}
124+
125+int64_t __moddi3 (int64_t num, int64_t den)
126+{
127+ int64_t v;
128+
129+ (void) __divmoddi4(num, den, &v);
130+ return v;
131+}
132+
133+int64_t __divdi3(int64_t num, int64_t den)
134+{
135+ return __divmoddi4(num, den, NULL);
136+}
137
138 #endif
139--
1402.9.2
141