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| author | H.J. Lu <hjl.tools@gmail.com> | 2022-06-16 18:52:02 -0700 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2022-06-17 15:18:10 -0700 |
| commit | 33ead027586c3371e6765f9070b9564a5ba7e89d (patch) | |
| tree | 607cad7ade69525d3a497b9677996e816a738c63 | |
| parent | c22eb807b0c8125101f6a274795425be2bbd0386 (diff) | |
| download | glibc-33ead027586c3371e6765f9070b9564a5ba7e89d.tar.gz glibc-33ead027586c3371e6765f9070b9564a5ba7e89d.tar.xz glibc-33ead027586c3371e6765f9070b9564a5ba7e89d.zip | |
elf: Silence GCC 11/12 false positive warning
Silence GCC 11/12 false positive warning with -mavx512f on dl-load.c: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106008 $ gcc -O2 -fPIC -march=x86-64 -mavx512f -S -Wall ... dl-load.c: In function ‘_dl_map_object_from_fd.constprop’: dl-load.c:1158:30: warning: ‘(((char *)loadcmds.113_68 + _933 + 16))[329406144173384849].mapend’ may be used uninitialized [-Wmaybe-uninitialized]
| -rw-r--r-- | elf/dl-load.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/elf/dl-load.c b/elf/dl-load.c index 2e4a010fc5..1ad0868dad 100644 --- a/elf/dl-load.c +++ b/elf/dl-load.c @@ -1152,10 +1152,20 @@ _dl_map_object_from_fd (const char *name, const char *origname, int fd, p_align_max = ph->p_align; c->mapoff = ALIGN_DOWN (ph->p_offset, GLRO(dl_pagesize)); + DIAG_PUSH_NEEDS_COMMENT; + +#if __GNUC_PREREQ (11, 0) + /* Suppress invalid GCC warning: + ‘(((char *)loadcmds.113_68 + _933 + 16))[329406144173384849].mapend’ may be used uninitialized [-Wmaybe-uninitialized] + See: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106008 + */ + DIAG_IGNORE_NEEDS_COMMENT (11, "-Wmaybe-uninitialized"); +#endif /* Determine whether there is a gap between the last segment and this one. */ if (nloadcmds > 1 && c[-1].mapend != c->mapstart) has_holes = true; + DIAG_POP_NEEDS_COMMENT; /* Optimize a common case. */ #if (PF_R | PF_W | PF_X) == 7 && (PROT_READ | PROT_WRITE | PROT_EXEC) == 7 |