diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/s390/s390-64/makecontext.c')
| -rw-r--r-- | sysdeps/unix/sysv/linux/s390/s390-64/makecontext.c | 19 |
1 files changed, 7 insertions, 12 deletions
diff --git a/sysdeps/unix/sysv/linux/s390/s390-64/makecontext.c b/sysdeps/unix/sysv/linux/s390/s390-64/makecontext.c index b08f1b4047..cdff9a4f21 100644 --- a/sysdeps/unix/sysv/linux/s390/s390-64/makecontext.c +++ b/sysdeps/unix/sysv/linux/s390/s390-64/makecontext.c @@ -37,6 +37,8 @@ +-----------------------+ n | overflow parameters | 160 +-----------------------+ + 8 | trampoline | 160+n + +-----------------------+ The registers are set up like this: %r2-%r6: parameters 1 to 5 %r7 : (*func) pointer @@ -53,16 +55,17 @@ void __makecontext (ucontext_t *ucp, void (*func) (void), int argc, ...) { - extern void __makecontext_ret (void); unsigned long *sp; va_list ap; int i; - sp = (unsigned long *) (((unsigned long) ucp->uc_stack.ss_sp - + ucp->uc_stack.ss_size) & -8L); + sp = (long *) (((long) ucp->uc_stack.ss_sp + ucp->uc_stack.ss_size) & -8L); + + /* Setup the trampoline. */ + *--sp = 0x0de7b904002807f9; /* Set the return address to trampoline. */ - ucp->uc_mcontext.gregs[14] = (long) __makecontext_ret; + ucp->uc_mcontext.gregs[14] = (long) sp; /* Set register parameters. */ va_start (ap, argc); @@ -94,12 +97,4 @@ __makecontext (ucontext_t *ucp, void (*func) (void), int argc, ...) ucp->uc_mcontext.gregs[15] = (long) sp; } -asm(".text\n" - ".type __makecontext_ret,@function\n" - "__makecontext_ret:\n" - " basr %r14,%r7\n" - " lgr %r2,%r8\n" - " br %r9\n" - ".size __makecontext_ret, .-__makecontext_ret"); - weak_alias (__makecontext, makecontext) |