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hurd: Suppress GCC 10 -Warray-bounds warning in init-first.c [BZ #25097] 

The trampoline code should really be rewritten in assembler because
this is all very undefined at the C level.

Change-Id: Ided58244ca0ee48892519faac5ac222a4e02dec4
This commit is contained in:
Florian Weimer 2019-11-15 18:36:58 +01:00
parent 9e3e27c4e3
commit 84df7a4637
1 changed files with 9 additions and 0 deletions
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9
sysdeps/mach/hurd/i386/init-first.c
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@ -30,6 +30,7 @@
#include <ldsodefs.h> #include <ldsodefs.h>
#include <fpu_control.h> #include <fpu_control.h>
#include <libc-diag.h>
extern void __mach_init (void); extern void __mach_init (void);
extern void __init_misc (int, char **, char **); extern void __init_misc (int, char **, char **);
@ -144,6 +145,12 @@ init1 (int argc, char *arg0, ...)
static inline void static inline void
init (int *data) init (int *data)
{ {
/* data is the address of the argc parameter to _dl_init_first or
doinit1 in _hurd_stack_setup, so the array subscripts are
undefined. */
DIAG_PUSH_NEEDS_COMMENT;
DIAG_IGNORE_NEEDS_COMMENT (10, "-Warray-bounds");
int argc = *data; int argc = *data;
char **argv = (void *) (data + 1); char **argv = (void *) (data + 1);
char **envp = &argv[argc + 1]; char **envp = &argv[argc + 1];
@ -265,6 +272,8 @@ init (int *data)
restored by function return. */ restored by function return. */
asm volatile ("# a %0 c %1" : : "a" (usercode), "c" (&init1)); asm volatile ("# a %0 c %1" : : "a" (usercode), "c" (&init1));
} }
DIAG_POP_NEEDS_COMMENT; /* -Warray-bounds. */
} }
/* These bits of inline assembler used to be located inside `init'. /* These bits of inline assembler used to be located inside `init'.