On Thu, Dec 11, 2025 at 10:03:56PM +0200, Jarkko Sakkinen wrote: > On Wed, Dec 10, 2025 at 04:48:08PM +0100, Thorsten Blum wrote: > > On 10. Dec 2025, at 16:32, Jarkko Sakkinen wrote: > > > On Wed, Dec 10, 2025 at 02:00:35PM +0100, Thorsten Blum wrote: > > >> Immediately break out of both loops when 'ret != SGX_UNMASKED_EVENT' > > >> instead of checking for the same condition again in the outer loop. > > >> > > >> Signed-off-by: Thorsten Blum <[email protected]> > > >> --- > > >> [...] > > > > > > I don't think moving code around is very useful. > > > > The patch doesn't actually move any code around, but it removes up to 50 > > (SGX_EINIT_SLEEP_COUNT) duplicate and therefore unnecessary if checks in > > the outer for loop. > > Temporary change for generating disassembly: > > ❯ git diff > diff --git a/arch/x86/kernel/cpu/sgx/ioctl.c b/arch/x86/kernel/cpu/sgx/ioctl.c > index 66f1efa16fbb..da43613eb837 100644 > --- a/arch/x86/kernel/cpu/sgx/ioctl.c > +++ b/arch/x86/kernel/cpu/sgx/ioctl.c > @@ -464,8 +464,8 @@ static long sgx_ioc_enclave_add_pages(struct sgx_encl > *encl, void __user *arg) > return ret; > } > > -static int sgx_encl_init(struct sgx_encl *encl, struct sgx_sigstruct > *sigstruct, > - void *token) > +int sgx_encl_init(struct sgx_encl *encl, struct sgx_sigstruct *sigstruct, > + void *token) > { > u64 mrsigner[4]; > int i, j; > > > Then I A/B by doing > > gdb -q -batch -ex 'set pagination off' -ex 'disassemble sgx_ioctl' > .clangd/vmlinux > sgx_ioctl_a.txt > gdb -q -batch -ex 'set pagination off' -ex 'disassemble sgx_ioctl' > .clangd/vmlinux > sgx_ioctl_b.txt > > ❯ diff -u sgx_ioctl_a.txt sgx_ioctl_b.txt > --- sgx_ioctl_a.txt 2025-12-11 21:59:59.660197371 +0200 > +++ sgx_ioctl_b.txt 2025-12-11 22:00:50.713917112 +0200 > @@ -12,31 +12,31 @@ > mov %rdx,0x20(%rsp) > lock btsq $0x1,0x10(%rbx) > mov $0xfffffffffffffff0,%rax > -jb 0xffffffff812275ac <sgx_ioctl+1402> > +jb 0xffffffff812275ad <sgx_ioctl+1402> > cmp $0xc018a407,%esi > -je 0xffffffff812273ce <sgx_ioctl+924> > -ja 0xffffffff81227098 <sgx_ioctl+102> > +je 0xffffffff812273cf <sgx_ioctl+924> > +ja 0xffffffff81227099 <sgx_ioctl+102> > cmp $0x4008a402,%esi > -je 0xffffffff81227174 <sgx_ioctl+322> > +je 0xffffffff81227175 <sgx_ioctl+322> > cmp $0x4008a403,%esi > -je 0xffffffff81227253 <sgx_ioctl+545> > +je 0xffffffff81227254 <sgx_ioctl+545> > cmp $0x4008a400,%esi > -je 0xffffffff812270c6 <sgx_ioctl+148> > -jmp 0xffffffff812270bc <sgx_ioctl+138> > +je 0xffffffff812270c7 <sgx_ioctl+148> > +jmp 0xffffffff812270bd <sgx_ioctl+138> > cmp $0xc028a406,%esi > -je 0xffffffff8122732f <sgx_ioctl+765> > +je 0xffffffff81227330 <sgx_ioctl+765> > cmp $0xc030a401,%esi > -je 0xffffffff81227162 <sgx_ioctl+304> > +je 0xffffffff81227163 <sgx_ioctl+304> > cmp $0xc028a405,%esi > -je 0xffffffff81227298 <sgx_ioctl+614> > +je 0xffffffff81227299 <sgx_ioctl+614> > mov $0xfffffdfd,%eax > -jmp 0xffffffff812275a5 <sgx_ioctl+1395> > +jmp 0xffffffff812275a6 <sgx_ioctl+1395> > xor %esi,%esi > mov $0xffffffffffffffea,%rax > mov %rsi,0x40(%rsp) > mov 0x10(%rbx),%rdx > and $0x10,%dl > -jne 0xffffffff812275a5 <sgx_ioctl+1395> > +jne 0xffffffff812275a6 <sgx_ioctl+1395> > mov 0x20(%rsp),%rsi > mov $0x8,%edx > lea 0x40(%rsp),%rdi > @@ -44,39 +44,39 @@ > mov %rax,%rdx > mov $0xfffffffffffffff2,%rax > test %rdx,%rdx > -jne 0xffffffff812275a5 <sgx_ioctl+1395> > -mov 0x437ed1(%rip),%rdi # 0xffffffff8165efe0 <kmalloc_caches+96> > +jne 0xffffffff812275a6 <sgx_ioctl+1395> > +mov 0x437ed0(%rip),%rdi # 0xffffffff8165efe0 <kmalloc_caches+96> > mov $0x1000,%edx > mov $0xcc0,%esi > call 0xffffffff812cdde9 <__kmalloc_cache_noprof> > mov %rax,%r13 > mov $0xfffffffffffffff4,%rax > test %r13,%r13 > -je 0xffffffff812275a5 <sgx_ioctl+1395> > +je 0xffffffff812275a6 <sgx_ioctl+1395> > mov 0x40(%rsp),%rsi > mov $0x1000,%edx > mov %r13,%rdi > mov $0xfffffff2,%r12d > call 0xffffffff8133b725 <_copy_from_user> > test %rax,%rax > -jne 0xffffffff81227243 <sgx_ioctl+529> > +jne 0xffffffff81227244 <sgx_ioctl+529> > mov %r13,%rsi > mov %rbx,%rdi > call 0xffffffff812267da <sgx_encl_create> > -jmp 0xffffffff81227240 <sgx_ioctl+526> > +jmp 0xffffffff81227241 <sgx_ioctl+526> > mov 0x20(%rsp),%rsi > mov %rbx,%rdi > call 0xffffffff812269b2 <sgx_ioc_enclave_add_pages> > -jmp 0xffffffff812275a5 <sgx_ioctl+1395> > +jmp 0xffffffff812275a6 <sgx_ioctl+1395> > xor %ecx,%ecx > mov $0xffffffffffffffea,%rax > mov %rcx,0x40(%rsp) > mov 0x10(%rbx),%rdx > and $0x10,%dl > -je 0xffffffff812275a5 <sgx_ioctl+1395> > +je 0xffffffff812275a6 <sgx_ioctl+1395> > mov 0x10(%rbx),%rdx > bt $0x8,%edx > -jb 0xffffffff812275a5 <sgx_ioctl+1395> > +jb 0xffffffff812275a6 <sgx_ioctl+1395> > mov 0x20(%rsp),%rsi > mov $0x8,%edx > lea 0x40(%rsp),%rdi > @@ -84,15 +84,15 @@ > mov %rax,%rdx > mov $0xfffffffffffffff2,%rax > test %rdx,%rdx > -jne 0xffffffff812275a5 <sgx_ioctl+1395> > -mov 0x437e15(%rip),%rdi # 0xffffffff8165efe0 <kmalloc_caches+96> > +jne 0xffffffff812275a6 <sgx_ioctl+1395> > +mov 0x437e14(%rip),%rdi # 0xffffffff8165efe0 <kmalloc_caches+96> > mov $0x1000,%edx > mov $0xcc0,%esi > call 0xffffffff812cdde9 <__kmalloc_cache_noprof> > mov %rax,%r13 > mov $0xfffffffffffffff4,%rax > test %r13,%r13 > -je 0xffffffff812275a5 <sgx_ioctl+1395> > +je 0xffffffff812275a6 <sgx_ioctl+1395> > lea 0x800(%r13),%r14 > xor %eax,%eax > mov $0x4c,%ecx > @@ -104,13 +104,13 @@ > mov 0x40(%rsp),%rsi > call 0xffffffff8133b725 <_copy_from_user> > test %rax,%rax > -jne 0xffffffff81227243 <sgx_ioctl+529> > +jne 0xffffffff81227244 <sgx_ioctl+529> > mov 0x10(%r13),%eax > test %eax,%eax > -je 0xffffffff81227232 <sgx_ioctl+512> > +je 0xffffffff81227233 <sgx_ioctl+512> > mov $0xffffffea,%r12d > cmp $0x8086,%eax > -jne 0xffffffff81227243 <sgx_ioctl+529> > +jne 0xffffffff81227244 <sgx_ioctl+529> > mov %r14,%rdx > mov %r13,%rsi > mov %rbx,%rdi > @@ -119,7 +119,7 @@ > mov %r13,%rdi > call 0xffffffff812ce269 <kfree> > movslq %r12d,%rax > -jmp 0xffffffff812275a5 <sgx_ioctl+1395> > +jmp 0xffffffff812275a6 <sgx_ioctl+1395> > xor %edx,%edx > mov 0x20(%rsp),%rsi > lea 0x40(%rsp),%rdi > @@ -129,12 +129,12 @@ > mov %rax,%rdx > mov $0xfffffffffffffff2,%rax > test %rdx,%rdx > -jne 0xffffffff812275a5 <sgx_ioctl+1395> > +jne 0xffffffff812275a6 <sgx_ioctl+1395> > mov 0x40(%rsp),%esi > lea 0x80(%rbx),%rdi > -call 0xffffffff81228220 <sgx_set_attribute> > +call 0xffffffff81228221 <sgx_set_attribute> > cltq > -jmp 0xffffffff812275a5 <sgx_ioctl+1395> > +jmp 0xffffffff812275a6 <sgx_ioctl+1395> > lea 0x40(%rsp),%r13 > xor %eax,%eax > mov $0xa,%ecx > @@ -144,32 +144,32 @@ > call 0xffffffff81226369 <sgx_ioc_sgx2_ready> > movslq %eax,%r12 > test %r12,%r12 > -jne 0xffffffff812273c6 <sgx_ioctl+916> > +jne 0xffffffff812273c7 <sgx_ioctl+916> > mov 0x20(%rsp),%rsi > mov $0x28,%edx > mov %r13,%rdi > call 0xffffffff8133b725 <_copy_from_user> > test %rax,%rax > -jne 0xffffffff81227367 <sgx_ioctl+821> > +jne 0xffffffff81227368 <sgx_ioctl+821> > mov 0x48(%rsp),%rdx > mov 0x40(%rsp),%rsi > mov %rbx,%rdi > mov $0xffffffffffffffea,%r12 > call 0xffffffff81226339 <sgx_validate_offset_length> > test %eax,%eax > -jne 0xffffffff812273c6 <sgx_ioctl+916> > +jne 0xffffffff812273c7 <sgx_ioctl+916> > mov 0x50(%rsp),%rax > cmp $0x7,%rax > -ja 0xffffffff812273c6 <sgx_ioctl+916> > +ja 0xffffffff812273c7 <sgx_ioctl+916> > and $0x3,%eax > cmp $0x2,%rax > -je 0xffffffff812273c6 <sgx_ioctl+916> > +je 0xffffffff812273c7 <sgx_ioctl+916> > mov 0x58(%rsp),%rax > or 0x60(%rsp),%rax > -jne 0xffffffff812273c6 <sgx_ioctl+916> > +jne 0xffffffff812273c7 <sgx_ioctl+916> > mov %r13,%rsi > call 0xffffffff81226611 <sgx_enclave_restrict_permissions> > -jmp 0xffffffff812273ac <sgx_ioctl+890> > +jmp 0xffffffff812273ad <sgx_ioctl+890> > lea 0x40(%rsp),%r13 > xor %eax,%eax > mov $0xa,%ecx > @@ -179,27 +179,27 @@ > call 0xffffffff81226369 <sgx_ioc_sgx2_ready> > movslq %eax,%r12 > test %r12,%r12 > -jne 0xffffffff812273c6 <sgx_ioctl+916> > +jne 0xffffffff812273c7 <sgx_ioctl+916> > mov 0x20(%rsp),%rsi > mov $0x28,%edx > mov %r13,%rdi > call 0xffffffff8133b725 <_copy_from_user> > test %rax,%rax > -je 0xffffffff81227370 <sgx_ioctl+830> > +je 0xffffffff81227371 <sgx_ioctl+830> > mov $0xfffffffffffffff2,%r12 > -jmp 0xffffffff812273c6 <sgx_ioctl+916> > +jmp 0xffffffff812273c7 <sgx_ioctl+916> > mov 0x48(%rsp),%rdx > mov 0x40(%rsp),%rsi > mov %rbx,%rdi > mov $0xffffffffffffffea,%r12 > call 0xffffffff81226339 <sgx_validate_offset_length> > test %eax,%eax > -jne 0xffffffff812273c6 <sgx_ioctl+916> > +jne 0xffffffff812273c7 <sgx_ioctl+916> > cmpq $0xff,0x50(%rsp) > -ja 0xffffffff812273c6 <sgx_ioctl+916> > +ja 0xffffffff812273c7 <sgx_ioctl+916> > mov 0x58(%rsp),%rax > or 0x60(%rsp),%rax > -jne 0xffffffff812273c6 <sgx_ioctl+916> > +jne 0xffffffff812273c7 <sgx_ioctl+916> > mov %r13,%rsi > call 0xffffffff81226413 <sgx_enclave_modify_types> > mov 0x20(%rsp),%rdi > @@ -208,9 +208,9 @@ > mov %rax,%r12 > call 0xffffffff8133b81f <_copy_to_user> > test %rax,%rax > -jne 0xffffffff81227367 <sgx_ioctl+821> > +jne 0xffffffff81227368 <sgx_ioctl+821> > mov %r12d,%eax > -jmp 0xffffffff812275a5 <sgx_ioctl+1395> > +jmp 0xffffffff812275a6 <sgx_ioctl+1395> > lea 0x28(%rsp),%r15 > xor %eax,%eax > mov $0x6,%ecx > @@ -220,15 +220,15 @@ > call 0xffffffff81226369 <sgx_ioc_sgx2_ready> > movslq %eax,%r14 > test %r14,%r14 > -jne 0xffffffff812275a2 <sgx_ioctl+1392> > +jne 0xffffffff812275a3 <sgx_ioctl+1392> > mov 0x20(%rsp),%rsi > mov $0x18,%edx > mov %r15,%rdi > call 0xffffffff8133b725 <_copy_from_user> > test %rax,%rax > -je 0xffffffff81227416 <sgx_ioctl+996> > +je 0xffffffff81227417 <sgx_ioctl+996> > mov $0xfffffffffffffff2,%r14 > -jmp 0xffffffff812275a2 <sgx_ioctl+1392> > +jmp 0xffffffff812275a3 <sgx_ioctl+1392> > mov 0x30(%rsp),%rdx > mov 0x28(%rsp),%rsi > mov %rbx,%rdi > @@ -236,10 +236,10 @@ > call 0xffffffff81226339 <sgx_validate_offset_length> > mov %eax,%r12d > test %eax,%eax > -jne 0xffffffff812275a2 <sgx_ioctl+1392> > +jne 0xffffffff812275a3 <sgx_ioctl+1392> > mov 0x38(%rsp),%r13 > test %r13,%r13 > -jne 0xffffffff812275a2 <sgx_ioctl+1392> > +jne 0xffffffff812275a3 <sgx_ioctl+1392> > lea 0x48(%rsp),%rdx > mov $0xe,%ecx > mov %rdx,%rdi > @@ -248,12 +248,12 @@ > movq $0x7,0x40(%rsp) > mov %rax,0x18(%rsp) > cmp 0x30(%rsp),%r13 > -jae 0xffffffff8122757f <sgx_ioctl+1357> > +jae 0xffffffff81227580 <sgx_ioctl+1357> > mov 0x28(%rsp),%rax > add (%rbx),%rax > add %r13,%rax > mov %rax,0x10(%rsp) > -call 0xffffffff81227e7c <sgx_reclaim_direct> > +call 0xffffffff81227e7d <sgx_reclaim_direct> > mov 0x18(%rsp),%rdi > call 0xffffffff81427ce9 <mutex_lock> > mov 0x10(%rsp),%rsi > @@ -261,32 +261,32 @@ > call 0xffffffff81225b7e <sgx_encl_load_page> > mov %rax,%r14 > cmp $0xfffffffffffff000,%rax > -jbe 0xffffffff812274c0 <sgx_ioctl+1166> > +jbe 0xffffffff812274c1 <sgx_ioctl+1166> > xor %r12d,%r12d > cmp $0xfffffffffffffff0,%rax > sete %r12b > lea -0xe(%r12,%r12,2),%r12d > -jmp 0xffffffff81227575 <sgx_ioctl+1347> > +jmp 0xffffffff81227576 <sgx_ioctl+1347> > mov 0x8(%rax),%eax > and $0xffff00,%eax > cmp $0x400,%eax > -je 0xffffffff812274d8 <sgx_ioctl+1190> > +je 0xffffffff812274d9 <sgx_ioctl+1190> > or $0xffffffff,%r12d > -jmp 0xffffffff81227575 <sgx_ioctl+1347> > +jmp 0xffffffff81227576 <sgx_ioctl+1347> > mov 0x10(%r14),%rdi > call 0xffffffff812262fc <sgx_get_epc_virt_addr> > mov %rax,%rsi > lea 0x40(%rsp),%rdi > call 0xffffffff81226328 <__emodpr> > bt $0x1e,%eax > -jae 0xffffffff812274cf <sgx_ioctl+1181> > +jae 0xffffffff812274d0 <sgx_ioctl+1181> > and $0xbfffffff,%eax > cmp $0xe,%eax > -jne 0xffffffff812274cf <sgx_ioctl+1181> > +jne 0xffffffff812274d0 <sgx_ioctl+1181> > mov 0x10(%r14),%rdi > -call 0xffffffff812279e0 <sgx_unmark_page_reclaimable> > +call 0xffffffff812279e1 <sgx_unmark_page_reclaimable> > test %eax,%eax > -jne 0xffffffff8122756f <sgx_ioctl+1341> > +jne 0xffffffff81227570 <sgx_ioctl+1341> > mov 0x18(%rsp),%rdi > add $0x1000,%r13 > call 0xffffffff81427360 <mutex_unlock> > @@ -309,7 +309,7 @@ > call 0xffffffff812ce269 <kfree> > mov 0x18(%rsp),%rdi > call 0xffffffff81427360 <mutex_unlock> > -jmp 0xffffffff81227469 <sgx_ioctl+1079> > +jmp 0xffffffff8122746a <sgx_ioctl+1079> > mov $0xfffffff0,%r12d > mov 0x18(%rsp),%rdi > call 0xffffffff81427360 <mutex_unlock> > @@ -320,7 +320,7 @@ > mov %r13,0x38(%rsp) > call 0xffffffff8133b81f <_copy_to_user> > test %rax,%rax > -jne 0xffffffff8122740a <sgx_ioctl+984> > +jne 0xffffffff8122740b <sgx_ioctl+984> > mov %r14d,%eax > lock andb $0xfd,0x10(%rbx) > cltq > > How would you interpret this? > > > > > Thanks, > > Thorsten > >
Oops, sorry, here's against sgx_encl_init(): ~/work/kernel.org/jarkko/linux-tpmdd queue* ❯ diff -u sgx_ioctl_a.txt sgx_ioctl_b.txt --- sgx_ioctl_a.txt 2025-12-11 22:11:57.444562168 +0200 +++ sgx_ioctl_b.txt 2025-12-11 22:12:08.308829402 +0200 @@ -4,81 +4,81 @@ mov $0x8,%ecx push %r14 push %r13 +mov %rdi,%r13 push %r12 push %rbp -mov %rdi,%rbp +mov $0xfffffff3,%ebp push %rbx sub $0x30,%rsp -mov %rdx,(%rsp) -mov 0x80(%rbp),%rdx lea 0x10(%rsp),%rdi +mov %rdx,0x8(%rsp) rep stos %eax,%es:(%rdi) -mov $0xfffffff3,%eax -not %rdx -and 0x78(%rbp),%rdx -jne 0xffffffff81227023 <sgx_encl_init+335> -mov 0x3a0(%rsi),%rdx +mov 0x80(%r13),%rax +not %rax +and 0x78(%r13),%rax +jne 0xffffffff81227022 <sgx_encl_init+334> +mov 0x3a0(%rsi),%rax mov %rsi,%rbx -and 0x3b0(%rsi),%rdx -mov $0xffffffea,%eax -and 0x6ebb47(%rip),%rdx # 0xffffffff81912a78 <sgx_attributes_reserved_mask> -jne 0xffffffff81227023 <sgx_encl_init+335> -mov 0x384(%rsi),%edx -and 0x388(%rsi),%edx -and 0x6ebb27(%rip),%edx # 0xffffffff81912a70 <sgx_misc_reserved_mask> -jne 0xffffffff81227023 <sgx_encl_init+335> -mov 0x3a8(%rsi),%rdx -and 0x3b8(%rsi),%rdx -and 0x5f920c(%rip),%rdx # 0xffffffff81820170 <sgx_xfrm_reserved_mask> -jne 0xffffffff81227023 <sgx_encl_init+335> -lea 0x10(%rsp),%rdx -lea 0x20(%rbp),%r14 -mov $0x32,%r12d -mov $0x2,%r15d +and 0x3b0(%rsi),%rax +mov $0xffffffea,%ebp +and 0x6ebb46(%rip),%rax # 0xffffffff81912a78 <sgx_attributes_reserved_mask> +jne 0xffffffff81227022 <sgx_encl_init+334> +mov 0x384(%rsi),%eax +and 0x388(%rsi),%eax +and 0x6ebb26(%rip),%eax # 0xffffffff81912a70 <sgx_misc_reserved_mask> +jne 0xffffffff81227022 <sgx_encl_init+334> +mov 0x3a8(%rsi),%rax +and 0x3b8(%rsi),%rax +and 0x5f920b(%rip),%rax # 0xffffffff81820170 <sgx_xfrm_reserved_mask> +jne 0xffffffff81227022 <sgx_encl_init+334> lea 0x80(%rsi),%rdi +lea 0x10(%rsp),%rdx mov $0x180,%esi +mov $0x32,%r12d call 0xffffffff81345271 <sha256> -mov %r14,%rdi +lea 0x20(%r13),%rax +mov %rax,%rdi +mov %rax,(%rsp) call 0xffffffff81427ce9 <mutex_lock> -mov $0x14,%r13d -mov 0x60(%rbp),%rdi +mov $0x14,%r15d +mov 0x60(%r13),%rdi call 0xffffffff812262fc <sgx_get_epc_virt_addr> -mov %rax,0x8(%rsp) +mov %rax,%rbp lea 0x10(%rsp),%rdi -call 0xffffffff812281fd <sgx_update_lepubkeyhash> -mov %r15d,%eax -mov (%rsp),%rdx -mov 0x8(%rsp),%rcx +call 0xffffffff812281fe <sgx_update_lepubkeyhash> +mov $0x2,%eax +mov 0x8(%rsp),%rdx +mov %rbp,%rcx encls +mov %eax,%r14d +mov %eax,%ebp cmp $0x80,%eax -jne 0xffffffff81226ff3 <sgx_encl_init+287> -dec %r13d -jne 0xffffffff81226f9e <sgx_encl_init+202> +jne 0xffffffff81226ff4 <sgx_encl_init+288> +dec %r15d +jne 0xffffffff81226f9d <sgx_encl_init+201> mov $0x14,%edi call 0xffffffff8127e4b1 <msleep_interruptible> -mov %gs:0x6d9035(%rip),%rdi # 0xffffffff81900018 <current_task> +mov %gs:0x6d9032(%rip),%rdi # 0xffffffff81900018 <current_task> call 0xffffffff81226387 <signal_pending> test %eax,%eax -jne 0xffffffff81227009 <sgx_encl_init+309> +jne 0xffffffff81227008 <sgx_encl_init+308> dec %r12d -jne 0xffffffff81226f98 <sgx_encl_init+196> -jmp 0xffffffff81226ffd <sgx_encl_init+297> -bt $0x1e,%eax -jb 0xffffffff81227010 <sgx_encl_init+316> -test %eax,%eax -je 0xffffffff81227002 <sgx_encl_init+302> -or $0xffffffff,%eax -jmp 0xffffffff81227015 <sgx_encl_init+321> -lock orb $0x1,0x11(%rbp) -jmp 0xffffffff81227015 <sgx_encl_init+321> -mov $0xfffffe00,%eax -jmp 0xffffffff81227015 <sgx_encl_init+321> -mov $0xfffffffb,%eax -mov %r14,%rdi -mov %eax,(%rsp) +jne 0xffffffff81226f97 <sgx_encl_init+195> +bt $0x1e,%r14d +jb 0xffffffff8122700f <sgx_encl_init+315> +test %r14d,%r14d +jne 0xffffffff81227016 <sgx_encl_init+322> +lock orb $0x1,0x11(%r13) +jmp 0xffffffff81227019 <sgx_encl_init+325> +mov $0xfffffe00,%ebp +jmp 0xffffffff81227019 <sgx_encl_init+325> +mov $0xfffffffb,%ebp +jmp 0xffffffff81227019 <sgx_encl_init+325> +or $0xffffffff,%ebp +mov (%rsp),%rdi call 0xffffffff81427360 <mutex_unlock> -mov (%rsp),%eax add $0x30,%rsp +mov %ebp,%eax pop %rbx pop %rbp pop %r12 It pretty much does what I said i.e., shuffles a new location for a code block. BR, Jarkko
