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Add the dl_iterate_phdr function to libdl for arm.

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Bug: 8410085
Change-Id: I94ed51bc5d4c626df7552c0e85c31ccee2d6568f
This commit is contained in:
Christopher Ferris 2013-08-19 17:45:09 -07:00
parent 6c74b8e05b
commit cb491bc66d
5 changed files with 18 additions and 21 deletions
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5
libc/arch-arm/arm.mk
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@ -21,10 +21,11 @@ _LIBC_ARCH_COMMON_SRC_FILES := \
# These are used by the static and dynamic versions of the libc
# respectively.
_LIBC_ARCH_STATIC_SRC_FILES := \
arch-arm/bionic/exidx_static.c
arch-arm/bionic/exidx_static.c \
bionic/dl_iterate_phdr_static.c \
_LIBC_ARCH_DYNAMIC_SRC_FILES := \
arch-arm/bionic/exidx_dynamic.c
arch-arm/bionic/exidx_dynamic.c \
# Remove the C++ fortify function implementations for which there is an
# arm assembler version.

4
libc/include/link.h
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@ -43,11 +43,11 @@ struct dl_phdr_info {
ElfW(Half) dlpi_phnum;
};
int dl_iterate_phdr(int (*cb)(struct dl_phdr_info*, size_t, void*), void*);
#ifdef __arm__
typedef long unsigned int* _Unwind_Ptr;
_Unwind_Ptr dl_unwind_find_exidx(_Unwind_Ptr pc, int* pcount);
#else
int dl_iterate_phdr(int (*cb)(struct dl_phdr_info*, size_t, void*), void*);
#endif
__END_DECLS

6
libdl/libdl.c
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@ -30,12 +30,8 @@ void android_update_LD_LIBRARY_PATH(const char* ld_library_path) { }
void *dl_unwind_find_exidx(void *pc, int *pcount) { return 0; }
#elif defined(__i386__) || defined(__mips__)
#endif
/* we munge the cb definition so we don't have to include any headers here.
* It won't affect anything since these are just symbols anyway */
int dl_iterate_phdr(int (*cb)(void *info, void *size, void *data), void *data) { return 0; }
#else
#error Unsupported architecture. Only mips, arm and x86 are supported.
#endif

20
linker/dlfcn.cpp
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@ -146,11 +146,10 @@ int dlclose(void* handle) {
}
#if defined(ANDROID_ARM_LINKER)
// 0000000 00011111 111112 22222222 2333333 3333444444444455555555556666666 6667
// 0123456 78901234 567890 12345678 9012345 6789012345678901234567890123456 7890
// 0000000 00011111 111112 22222222 2333333 3333444444444455555555556666666 6667777777777888 8888888
// 0123456 78901234 567890 12345678 9012345 6789012345678901234567890123456 7890123456789012 3456789
#define ANDROID_LIBDL_STRTAB \
"dlopen\0dlclose\0dlsym\0dlerror\0dladdr\0android_update_LD_LIBRARY_PATH\0dl_unwind_find_exidx\0"
"dlopen\0dlclose\0dlsym\0dlerror\0dladdr\0android_update_LD_LIBRARY_PATH\0dl_iterate_phdr\0dl_unwind_find_exidx\0"
#elif defined(ANDROID_X86_LINKER) || defined(ANDROID_MIPS_LINKER)
// 0000000 00011111 111112 22222222 2333333 3333444444444455555555556666666 6667
// 0123456 78901234 567890 12345678 9012345 6789012345678901234567890123456 7890
@ -181,10 +180,9 @@ static Elf32_Sym gLibDlSymtab[] = {
ELF32_SYM_INITIALIZER(21, &dlerror, 1),
ELF32_SYM_INITIALIZER(29, &dladdr, 1),
ELF32_SYM_INITIALIZER(36, &android_update_LD_LIBRARY_PATH, 1),
#if defined(ANDROID_ARM_LINKER)
ELF32_SYM_INITIALIZER(67, &dl_unwind_find_exidx, 1),
#elif defined(ANDROID_X86_LINKER) || defined(ANDROID_MIPS_LINKER)
ELF32_SYM_INITIALIZER(67, &dl_iterate_phdr, 1),
#if defined(ANDROID_ARM_LINKER)
ELF32_SYM_INITIALIZER(83, &dl_unwind_find_exidx, 1),
#endif
};
@ -207,7 +205,11 @@ static Elf32_Sym gLibDlSymtab[] = {
// Note that adding any new symbols here requires
// stubbing them out in libdl.
static unsigned gLibDlBuckets[1] = { 1 };
#if defined(ANDROID_ARM_LINKER)
static unsigned gLibDlChains[9] = { 0, 2, 3, 4, 5, 6, 7, 8, 0 };
#else
static unsigned gLibDlChains[8] = { 0, 2, 3, 4, 5, 6, 7, 0 };
#endif
// This is used by the dynamic linker. Every process gets these symbols for free.
soinfo libdl_info = {
@ -223,8 +225,8 @@ soinfo libdl_info = {
strtab: ANDROID_LIBDL_STRTAB,
symtab: gLibDlSymtab,
nbucket: 1,
nchain: 8,
nbucket: sizeof(gLibDlBuckets)/sizeof(unsigned),
nchain: sizeof(gLibDlChains)/sizeof(unsigned),
bucket: gLibDlBuckets,
chain: gLibDlChains,

4
linker/linker.cpp
View File

@ -414,7 +414,7 @@ _Unwind_Ptr dl_unwind_find_exidx(_Unwind_Ptr pc, int *pcount)
return NULL;
}
#elif defined(ANDROID_X86_LINKER) || defined(ANDROID_MIPS_LINKER)
#endif
/* Here, we only have to provide a callback to iterate across all the
* loaded libraries. gcc_eh does the rest. */
@ -437,8 +437,6 @@ dl_iterate_phdr(int (*cb)(dl_phdr_info *info, size_t size, void *data),
return rv;
}
#endif
static Elf32_Sym* soinfo_elf_lookup(soinfo* si, unsigned hash, const char* name) {
Elf32_Sym* symtab = si->symtab;
const char* strtab = si->strtab;