fix possible (questionable) strict aliasing violations and ptr arith

diff --git a/src/ldso/dynlink.c b/src/ldso/dynlink.c
index f57485dad698285c965b9d22aa3c3d021f25156a..56ba89eb57b4f20f90ed2753de1d2df84b2ea80f 100644 (file)
--- a/src/ldso/dynlink.c
+++ b/src/ldso/dynlink.c
@@ -123,7 +123,7 @@ static void do_relocs(unsigned char *base, size_t *rel, size_t rel_size, size_t
 
 static void *map_library(int fd, size_t *lenp, unsigned char **basep, size_t *dynp)
 {
-       size_t buf[896/sizeof(size_t)];
+       Ehdr buf[(896+sizeof(Ehdr))/sizeof(Ehdr)];
        size_t phsize;
        size_t addr_min=SIZE_MAX, addr_max=0, map_len;
        size_t this_min, this_max;
@@ -137,11 +137,11 @@ static void *map_library(int fd, size_t *lenp, unsigned char **basep, size_t *dy
 
        ssize_t l = read(fd, buf, sizeof buf);
        if (l<sizeof *eh) return 0;
-       eh = (void *)buf;
+       eh = buf;
        phsize = eh->e_phentsize * eh->e_phnum;
        if (phsize + sizeof *eh > l) return 0;
        if (eh->e_phoff + phsize > l) {
-               l = pread(fd, buf+sizeof *eh, phsize, eh->e_phoff);
+               l = pread(fd, buf+1, phsize, eh->e_phoff);
                if (l != phsize) return 0;
                eh->e_phoff = sizeof *eh;
        }