diff options
| -rw-r--r-- | ChangeLog | 5 | ||||
| -rw-r--r-- | elf/dl-runtime.c | 12 |
2 files changed, 17 insertions, 0 deletions
@@ -1,3 +1,8 @@ +1999-07-13 Andreas Schwab <schwab@suse.de> + + * elf/dl-runtime.c (fixup, profile_fixup): Call alloca to prevent + inlining. Fixes PR libc/1198. + 1999-07-14 Andreas Schwab <schwab@suse.de> * Makerules (common-generated): Don't prepend $(common-objpfx). diff --git a/elf/dl-runtime.c b/elf/dl-runtime.c index a0f54bd..9f3004e 100644 --- a/elf/dl-runtime.c +++ b/elf/dl-runtime.c @@ -57,6 +57,12 @@ fixup ( void *const rel_addr = (void *)(l->l_addr + reloc->r_offset); ElfW(Addr) value; + /* The use of `alloca' here looks ridiculous but it helps. The goal is + to prevent the function from being inlined and thus optimized out. + There is no official way to do this so we use this trick. gcc never + inlines functions which use `alloca'. */ + alloca (sizeof (int)); + /* Sanity check that we're really looking at a PLT relocation. */ assert (ELFW(R_TYPE)(reloc->r_info) == ELF_MACHINE_JMP_SLOT); @@ -110,6 +116,12 @@ profile_fixup ( ElfW(Addr) *resultp; ElfW(Addr) value; + /* The use of `alloca' here looks ridiculous but it helps. The goal is + to prevent the function from being inlined, and thus optimized out. + There is no official way to do this so we use this trick. gcc never + inlines functions which use `alloca'. */ + alloca (sizeof (int)); + /* This is the address in the array where we store the result of previous relocations. */ resultp = &l->l_reloc_result[reloc_offset / sizeof (PLTREL)]; |