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Force export symbols on all x86 variants in libc.

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For silvermont, the __popcountsi2 symbol does not get exported by libc.
But for atom, this symbol is exported. Since we already exported this symbol
for previous releases, it's better to just follow through and force
the export, but only for 32 bit. x86 64 bit will not export this symbol.

Bug: 17681440

(cherry picked from commit d11eac3455a059a092ceee92eda9905e1d661e94)

Change-Id: I93704c721d98d569922f606f214069bda24872ba
This commit is contained in:
Christopher Ferris 2014-10-06 15:11:28 -07:00
parent b5cba6081b
commit 6869d26ad9
3 changed files with 22 additions and 5 deletions
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15
libc/arch-x86/bionic/libgcc_compat.c Normal file
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@ -0,0 +1,15 @@
/* Generated by genlibgcc_compat.py */
extern char __divdi3;
extern char __moddi3;
extern char __popcountsi2;
extern char __udivdi3;
extern char __umoddi3;
void* __bionic_libgcc_compat_symbols[] = {
&__divdi3,
&__moddi3,
&__popcountsi2,
&__udivdi3,
&__umoddi3,
};

1
libc/arch-x86/x86.mk
View File

@ -38,6 +38,7 @@ libc_freebsd_src_files_x86 += \
libc_bionic_src_files_x86 += \
arch-x86/bionic/__bionic_clone.S \
arch-x86/bionic/_exit_with_stack_teardown.S \
arch-x86/bionic/libgcc_compat.c \
arch-x86/bionic/__restore_rt.S \
arch-x86/bionic/__restore.S \
arch-x86/bionic/_setjmp.S \

11
libc/tools/genlibgcc_compat.py
View File

@ -76,9 +76,6 @@ libgcc_compat_header = "/* Generated by genlibgcc_compat.py */\n\n"
class Generator:
def process(self):
android_build_top_path = os.environ["ANDROID_BUILD_TOP"]
build_path = android_build_top_path + "/bionic/libc"
file_name = "libgcc_compat.c"
file_path = build_path + "/arch-arm/bionic/" + file_name
print "* ANDROID_BUILD_TOP=" + android_build_top_path
@ -86,8 +83,12 @@ class Generator:
arch = subprocess.check_output(["CALLED_FROM_SETUP=true BUILD_SYSTEM=build/core make --no-print-directory -f build/core/config.mk dumpvar-TARGET_ARCH"],
cwd=android_build_top_path, shell=True).strip()
if arch != 'arm':
sys.exit("Error: Invalid TARGET_ARCH='" + arch + "' expecting 'arm'")
if arch != 'arm' and arch != 'x86':
sys.exit("Error: Invalid TARGET_ARCH='" + arch + "' expecting 'arm' or 'x86'")
build_path = android_build_top_path + "/bionic/libc"
file_name = "libgcc_compat.c"
file_path = build_path + "/arch-" + arch + "/bionic/" + file_name
build_output_file_path = tempfile.mkstemp()[1]