#if defined(__SUNPRO_C) && defined(__sparcv9) # define ABI64 /* They've said -xarch=v9 at command line */ #elif defined(__GNUC__) && defined(__arch64__) # define ABI64 /* They've said -m64 at command line */ #endif #ifdef ABI64 .register %g2,#scratch .register %g3,#scratch # define FRAME -192 # define BIAS 2047 #else # define FRAME -96 # define BIAS 0 #endif .text .align 32 .global OPENSSL_wipe_cpu .type OPENSSL_wipe_cpu,#function ! Keep in mind that this does not excuse us from wiping the stack! ! This routine wipes registers, but not the backing store [which ! resides on the stack, toward lower addresses]. To facilitate for ! stack wiping I return pointer to the top of stack of the *caller*. OPENSSL_wipe_cpu: save %sp,FRAME,%sp nop #ifdef __sun #include <sys/trap.h> ta ST_CLEAN_WINDOWS #else call .walk.reg.wins #endif nop call .PIC.zero.up mov .zero-(.-4),%o0 ldd [%o0],%f0 subcc %g0,1,%o0 ! Following is V9 "rd %ccr,%o0" instruction. However! V8 ! specification says that it ("rd %asr2,%o0" in V8 terms) does ! not cause illegal_instruction trap. It therefore can be used ! to determine if the CPU the code is executing on is V8- or ! V9-compliant, as V9 returns a distinct value of 0x99, ! "negative" and "borrow" bits set in both %icc and %xcc. .word 0x91408000 !rd %ccr,%o0 cmp %o0,0x99 bne .v8 nop ! Even though we do not use %fp register bank, ! we wipe it as memcpy might have used it... .word 0xbfa00040 !fmovd %f0,%f62 .word 0xbba00040 !... .word 0xb7a00040 .word 0xb3a00040 .word 0xafa00040 .word 0xaba00040 .word 0xa7a00040 .word 0xa3a00040 .word 0x9fa00040 .word 0x9ba00040 .word 0x97a00040 .word 0x93a00040 .word 0x8fa00040 .word 0x8ba00040 .word 0x87a00040 .word 0x83a00040 !fmovd %f0,%f32 .v8: fmovs %f1,%f31 clr %o0 fmovs %f0,%f30 clr %o1 fmovs %f1,%f29 clr %o2 fmovs %f0,%f28 clr %o3 fmovs %f1,%f27 clr %o4 fmovs %f0,%f26 clr %o5 fmovs %f1,%f25 clr %o7 fmovs %f0,%f24 clr %l0 fmovs %f1,%f23 clr %l1 fmovs %f0,%f22 clr %l2 fmovs %f1,%f21 clr %l3 fmovs %f0,%f20 clr %l4 fmovs %f1,%f19 clr %l5 fmovs %f0,%f18 clr %l6 fmovs %f1,%f17 clr %l7 fmovs %f0,%f16 clr %i0 fmovs %f1,%f15 clr %i1 fmovs %f0,%f14 clr %i2 fmovs %f1,%f13 clr %i3 fmovs %f0,%f12 clr %i4 fmovs %f1,%f11 clr %i5 fmovs %f0,%f10 clr %g1 fmovs %f1,%f9 clr %g2 fmovs %f0,%f8 clr %g3 fmovs %f1,%f7 clr %g4 fmovs %f0,%f6 clr %g5 fmovs %f1,%f5 fmovs %f0,%f4 fmovs %f1,%f3 fmovs %f0,%f2 add %fp,BIAS,%i0 ! return pointer to callerīs top of stack ret restore .zero: .long 0x0,0x0 .PIC.zero.up: retl add %o0,%o7,%o0 #ifdef DEBUG .global walk_reg_wins .type walk_reg_wins,#function walk_reg_wins: #endif .walk.reg.wins: save %sp,FRAME,%sp cmp %i7,%o7 be 2f clr %o0 cmp %o7,0 ! compiler never cleans %o7... be 1f ! could have been a leaf function... clr %o1 call .walk.reg.wins nop 1: clr %o2 clr %o3 clr %o4 clr %o5 clr %o7 clr %l0 clr %l1 clr %l2 clr %l3 clr %l4 clr %l5 clr %l6 clr %l7 add %o0,1,%i0 ! used for debugging 2: ret restore .size OPENSSL_wipe_cpu,.-OPENSSL_wipe_cpu .global OPENSSL_atomic_add .type OPENSSL_atomic_add,#function OPENSSL_atomic_add: #ifndef ABI64 subcc %g0,1,%o2 .word 0x95408000 !rd %ccr,%o2, see comment above cmp %o2,0x99 be .v9 nop save %sp,FRAME,%sp ba .enter nop #ifdef __sun ! Note that you don't have to link with libthread to call thr_yield, ! as libc provides a stub, which is overloaded the moment you link ! with *either* libpthread or libthread... #define YIELD_CPU thr_yield #else ! applies at least to Linux and FreeBSD... Feedback expected... #define YIELD_CPU sched_yield #endif .spin: call YIELD_CPU nop .enter: ld [%i0],%i2 cmp %i2,-4096 be .spin mov -1,%i2 swap [%i0],%i2 cmp %i2,-1 be .spin add %i2,%i1,%i2 stbar st %i2,[%i0] sra %i2,%g0,%i0 ret restore .v9: #endif ld [%o0],%o2 1: add %o1,%o2,%o3 .word 0xd7e2100a !cas [%o0],%o2,%o3, compare [%o0] with %o2 and swap %o3 cmp %o2,%o3 bne 1b mov %o3,%o2 ! cas is always fetching to dest. register add %o1,%o2,%o0 ! OpenSSL expects the new value retl sra %o0,%g0,%o0 ! we return signed int, remember? .size OPENSSL_atomic_add,.-OPENSSL_atomic_add .global OPENSSL_rdtsc subcc %g0,1,%o0 .word 0x91408000 !rd %ccr,%o0 cmp %o0,0x99 bne .notsc xor %o0,%o0,%o0 save %sp,FRAME-16,%sp mov 513,%o0 !SI_PLATFORM add %sp,BIAS+16,%o1 call sysinfo mov 256,%o2 add %sp,BIAS-16,%o1 ld [%o1],%l0 ld [%o1+4],%l1 ld [%o1+8],%l2 mov %lo('SUNW'),%l3 ret restore .notsc: retl nop .type OPENSSL_rdtsc,#function .size OPENSSL_rdtsc,.-OPENSSL_atomic_add