Hi Andreas,
Am 22.04.2023 um 20:07 schrieb Andreas Schwab:
On Apr 22 2023, Michael Schmitz wrote:
Took a little while to figure out that the ucontext format changed in the
decade or two since my userland's libc headers were generated.
In which way did it change?
This is the definition from the kernel's
include/uapi/asm-generic/ucontext.h:
struct ucontext {
unsigned long uc_flags;
struct ucontext *uc_link;
stack_t uc_stack;
struct sigcontext uc_mcontext;
sigset_t uc_sigmask; /* mask last for extensibility */
};
And this is /usr/include/sys/ucontext.h:
/* Userlevel context. */
typedef struct ucontext
{
unsigned long int uc_flags;
struct ucontext *uc_link;
__sigset_t uc_sigmask;
stack_t uc_stack;
mcontext_t uc_mcontext;
long int uc_filler[174];
} ucontext_t;
uc_sigmask appears before uc_stack and uc_mcontext.
I'm assuming libc just passes on what the kernel set, without reordering?
Cheers,
Michael
