diff options
| -rw-r--r-- | purgatory/arch/s390/setup-s390.S | 14 | ||||
| -rw-r--r-- | purgatory/purgatory.c | 13 |
2 files changed, 22 insertions, 5 deletions
diff --git a/purgatory/arch/s390/setup-s390.S b/purgatory/arch/s390/setup-s390.S index 6db75fd..db78735 100644 --- a/purgatory/arch/s390/setup-s390.S +++ b/purgatory/arch/s390/setup-s390.S @@ -11,12 +11,23 @@ .balign 16 purgatory_start: #ifdef __s390x__ + larl %r5,gprs_save_area + stmg %r6,%r15,0(%r5) larl %r15,lstack_end aghi %r15,-160 + + clgfi %r2,0 + je verify_checksums + brasl %r14,purgatory larl %r14,kdump_psw lpswe 0(%r14) +verify_checksums: + brasl %r14,verify_sha256_digest + larl %r5,gprs_save_area + lmg %r6,%r15,0(%r5) + br %r14 .section ".data" .balign 16 kdump_psw: @@ -24,6 +35,9 @@ kdump_psw: .quad 0x0000000000010010 .bss +gprs_save_area: + .fill 80 + .balign 4096 lstack: .skip 4096 diff --git a/purgatory/purgatory.c b/purgatory/purgatory.c index 3827d59..3bbcc09 100644 --- a/purgatory/purgatory.c +++ b/purgatory/purgatory.c @@ -9,7 +9,7 @@ struct sha256_region sha256_regions[SHA256_REGIONS] = {}; sha256_digest_t sha256_digest = { }; -void verify_sha256_digest(void) +int verify_sha256_digest(void) { struct sha256_region *ptr, *end; sha256_digest_t digest; @@ -34,16 +34,19 @@ void verify_sha256_digest(void) printf("%hhx ", sha256_digest[i]); } printf("\n"); - for(;;) { - /* loop forever */ - } + return 1; } + return 0; } void purgatory(void) { printf("I'm in purgatory\n"); setup_arch(); - verify_sha256_digest(); + if (verify_sha256_digest()) { + for(;;) { + /* loop forever */ + } + } post_verification_setup_arch(); } |