diff options
Diffstat (limited to 'ldso/ldso/dl-elf.c')
-rw-r--r-- | ldso/ldso/dl-elf.c | 52 |
1 files changed, 44 insertions, 8 deletions
diff --git a/ldso/ldso/dl-elf.c b/ldso/ldso/dl-elf.c index d27e4ccb3..7f0f76c35 100644 --- a/ldso/ldso/dl-elf.c +++ b/ldso/ldso/dl-elf.c @@ -31,6 +31,7 @@ #include "ldso.h" +void *(*_dl_malloc_function) (size_t size) = NULL; #ifdef USE_CACHE @@ -405,7 +406,7 @@ struct elf_resolve *_dl_load_elf_shared_library(int secure, tpnt = _dl_check_hashed_files(libname); if (tpnt) { if (*rpnt) { - (*rpnt)->next = (struct dyn_elf *) _dl_malloc(sizeof(struct dyn_elf)); + (*rpnt)->next = (struct dyn_elf *) _dl_malloc_function(sizeof(struct dyn_elf)); _dl_memset((*rpnt)->next, 0, sizeof(struct dyn_elf)); (*rpnt)->next->prev = (*rpnt); *rpnt = (*rpnt)->next; @@ -691,7 +692,7 @@ struct elf_resolve *_dl_load_elf_shared_library(int secure, * Add this object into the symbol chain */ if (*rpnt) { - (*rpnt)->next = (struct dyn_elf *) _dl_malloc(sizeof(struct dyn_elf)); + (*rpnt)->next = (struct dyn_elf *) _dl_malloc_function(sizeof(struct dyn_elf)); _dl_memset((*rpnt)->next, 0, sizeof(struct dyn_elf)); (*rpnt)->next->prev = (*rpnt); *rpnt = (*rpnt)->next; @@ -883,12 +884,21 @@ char *_dl_strdup(const char *string) int len; len = _dl_strlen(string); - retval = _dl_malloc(len + 1); + retval = _dl_malloc_function(len + 1); _dl_strcpy(retval, string); return retval; } -void *(*_dl_malloc_function) (size_t size) = NULL; +union __align_type +{ + void *p; + void (*fp)(void); + long long ll; +#if defined __UCLIBC_HAS_FLOATS__ && ! defined __UCLIBC_HAS_SOFT_FLOAT__ + double d; +#endif +}; + void *_dl_malloc(int size) { void *retval; @@ -902,11 +912,29 @@ void *_dl_malloc(int size) if (_dl_malloc_function) return (*_dl_malloc_function) (size); - if (_dl_malloc_addr - _dl_mmap_zero + size > _dl_pagesize) { + if ((int)(_dl_malloc_addr - _dl_mmap_zero + size) > (int)_dl_pagesize) { + int rounded_size; + + /* Since the above assumes we get a full page even if + we request less than that, make sure we request a + full page, since uClinux may give us less than than + a full page. We might round even + larger-than-a-page sizes, but we end up never + reusing _dl_mmap_zero/_dl_malloc_addr in that case, + so we don't do it. + + The actual page size doesn't really matter; as long + as we're self-consistent here, we're safe. */ + if (size < (int)_dl_pagesize) + rounded_size = (size + _dl_pagesize - 1) & _dl_pagesize; + else + rounded_size = size; + + #ifdef __SUPPORT_LD_DEBUG_EARLY__ _dl_dprintf(2, "malloc: mmapping more memory\n"); #endif - _dl_mmap_zero = _dl_malloc_addr = _dl_mmap((void *) 0, size, + _dl_mmap_zero = _dl_malloc_addr = _dl_mmap((void *) 0, rounded_size, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); if (_dl_mmap_check_error(_dl_mmap_zero)) { _dl_dprintf(2, "%s: mmap of a spare page failed!\n", _dl_progname); @@ -920,8 +948,16 @@ void *_dl_malloc(int size) * Align memory to 4 byte boundary. Some platforms require this, others * simply get better performance. */ - _dl_malloc_addr = (unsigned char *) (((unsigned long) _dl_malloc_addr + 3) & ~(3)); + _dl_malloc_addr = (unsigned char *) + (((unsigned long) _dl_malloc_addr + + __alignof__(union __align_type) - 1) + & ~(__alignof__(union __align_type) - 1)); return retval; } - +void (*_dl_free_function) (void *p) = NULL; +void +_dl_free (void *p) { + if (_dl_free_function) + (*_dl_free_function) (p); +} |