[SeaBIOS] [PATCH v3 5/5] tpm: Rename remaining interrupt functions

[Stefan Berger]

From: Stefan Berger

Rename all remaining functions called directly by the BIOS interrupt
by adding the suffix '_int' to them.

Add the check for whether the preboot interface is shut down
where missing.

Signed-off-by: Stefan Berger 
---
 src/tcgbios.c | 40 ++++++++++++++++++++++++----------------
 1 file changed, 24 insertions(+), 16 deletions(-)

diff --git a/src/tcgbios.c b/src/tcgbios.c
index 7a60138..5229b4e 100644
--- a/src/tcgbios.c
+++ b/src/tcgbios.c
@@ -757,7 +757,7 @@ tpm_extend(u8 *hash, u32 pcrindex)

static u32
-hash_all(const struct hai *hai, u8 *hash)
+hash_all_int(const struct hai *hai, u8 *hash)
 {
     if (is_preboot_if_shutdown() != 0)
         return TCG_INTERFACE_SHUTDOWN;
@@ -869,6 +869,11 @@ hash_log_extend_event_int(const struct hleei_short *hleei_s,
     struct pcpes *pcpes;
     u32 pcrindex;

+    if (is_preboot_if_shutdown() != 0) {
+        rc = TCG_INTERFACE_SHUTDOWN;
+        goto err_exit;
+    }
+
     /* short or long version? */
     switch (hleei_s->ipblength) {
     case sizeof(struct hleei_short):
@@ -923,7 +928,7 @@ err_exit:

static u32
-tss(struct ti *ti, struct to *to)
+tss_int(struct ti *ti, struct to *to)
 {
     u32 rc = 0;

@@ -941,11 +946,11 @@ tss(struct ti *ti, struct to *to)

static u32
-compact_hash_log_extend_event(u8 *buffer,
-                              u32 info,
-                              u32 length,
-                              u32 pcrindex,
-                              u32 *edx_ptr)
+compact_hash_log_extend_event_int(u8 *buffer,
+                                  u32 info,
+                                  u32 length,
+                                  u32 pcrindex,
+                                  u32 *edx_ptr)
 {
     u32 rc = 0;
     struct pcpes pcpes = {
@@ -956,6 +961,9 @@ compact_hash_log_extend_event(u8 *buffer,
     };
     u16 entry_count;

+    if (is_preboot_if_shutdown() != 0)
+        return TCG_INTERFACE_SHUTDOWN;
+
     rc = hash_log_extend_event(buffer, length,
                                &pcpes,
                                (char *)&pcpes.event, pcpes.eventdatasize,
@@ -1021,22 +1029,22 @@ tpm_interrupt_handler32(struct bregs *regs)

case TCG_HashAll:
         regs->eax =
-            hash_all((struct hai*)input_buf32(regs),
-                     (u8 *)output_buf32(regs));
+            hash_all_int((struct hai*)input_buf32(regs),
+                          (u8 *)output_buf32(regs));
         break;

case TCG_TSS:
-        regs->eax = tss((struct ti*)input_buf32(regs),
-                    (struct to*)output_buf32(regs));
+        regs->eax = tss_int((struct ti*)input_buf32(regs),
+                            (struct to*)output_buf32(regs));
         break;

case TCG_CompactHashLogExtendEvent:
         regs->eax =
-          compact_hash_log_extend_event((u8 *)input_buf32(regs),
-                                        regs->esi,
-                                        regs->ecx,
-                                        regs->edx,
-                                        &regs->edx);
+          compact_hash_log_extend_event_int((u8 *)input_buf32(regs),
+                                            regs->esi,
+                                            regs->ecx,
+                                            regs->edx,
+                                            &regs->edx);
         break;

default: