disable legacy init/fini processing on ARM

since the old, poorly-thought-out musl approach to init/fini arrays on
ARM (when it was the only arch that needed them) was to put the code
in crti/crtn and have the legacy _init/_fini code run the arrays,
adding proper init/fini array support caused the arrays to get
processed twice on ARM. I'm not sure skipping legacy init/fini
processing is the best solution to the problem, but it works, and it
shouldn't break anything since the legacy init/fini system was never
used for ARM EABI.

diff --git a/arch/arm/reloc.h b/arch/arm/reloc.h
index 9ca0b48ce3d4f4761edec470f8fee28a05a35d9f..264b7ab2c4375a7fb7fc6d7b2114031f4114f57b 100644 (file)
--- a/arch/arm/reloc.h
+++ b/arch/arm/reloc.h
@@ -52,3 +52,5 @@ static inline void do_single_reloc(
                break;
        }
 }
+
+#define NO_LEGACY_INITFINI

diff --git a/src/ldso/dynlink.c b/src/ldso/dynlink.c
index 3a0bf95d03540b8532d6e18a26cf11a5cf8ccc3f..b5e4b72f8a29332290a6a273da40a965bc210bdd 100644 (file)
--- a/src/ldso/dynlink.c
+++ b/src/ldso/dynlink.c
@@ -702,8 +702,10 @@ static void do_fini()
                        size_t *fn = (size_t *)(p->base + dyn[DT_FINI_ARRAY])+n;
                        while (n--) ((void (*)(void))*--fn)();
                }
+#ifndef NO_LEGACY_INITFINI
                if (dyn[0] & (1<<DT_FINI))
                        ((void (*)(void))(p->base + dyn[DT_FINI]))();
+#endif
        }
 }
 
@@ -723,8 +725,10 @@ static void do_init_fini(struct dso *p)
                        p->fini_next = fini_head;
                        fini_head = p;
                }
+#ifndef NO_LEGACY_INITFINI
                if (dyn[0] & (1<<DT_INIT))
                        ((void (*)(void))(p->base + dyn[DT_INIT]))();
+#endif
                if (dyn[0] & (1<<DT_INIT_ARRAY)) {
                        size_t n = dyn[DT_INIT_ARRAYSZ]/sizeof(size_t);
                        size_t *fn = (void *)(p->base + dyn[DT_INIT_ARRAY]);