Random stuff.

[polintos/scott/priv.git] / doc / abi / x86

diff --git a/doc/abi/x86 b/doc/abi/x86
index c62911dd5b0213402c2cbafe94a45e74ada92e9a..a095a79e4125886983eb8e6e2e919b28b965a404 100644 (file)
--- a/doc/abi/x86
+++ b/doc/abi/x86
@@ -4,11 +4,11 @@ Out-of-Process Method Invocation:
    Caller:
       eax: pointer to parameter info block (PIB)
 
-      Call the 32-bit address stored at 0x7fff0000 to invoke the method.
+      Call 0x7fff0000 to invoke the method.
       
       Upon return:
       ebx, esi, edi, ebp, esp: preserved
-      eax: pointer to exception, or NULL if none.
+      eax: pointer to exception, or NULL if none
            If there is an exception, the user part of the syscall
            function will search for an exception handling function
            that covers the calling address.  If none is found,
@@ -18,14 +18,23 @@ Out-of-Process Method Invocation:
       ecx: may be clobbered
       
    Callee:
-      eax: pointer to PIB
-      edx: pointer to caller information struct, or NULL if not
-           requested.
-      esp: NULL.
+      eax: object ID
+      edx: segment zero size
+      ecx: total size
+      ebx: method ID
+      esp, ebp, esi, edi: NULL.
 
-      Jump to the 32-bit address stored at 0x7fff0004 to return.
+      Jump to 0x7fff0080 to return.
       
       Upon return:
-      eax: pointer to exception, or NULL if none.
+      eax: pointer to exception, or NULL if none
       edx: length of exception segment, if any
-      ebx, esi, edi, ebp, esp: may be clobbered
+      ebx, ecx, esi, edi, ebp, esp: may be clobbered
+
+Other system calls:
+   eax, edx, ecx: syscall arguments.
+       
+   Call 0x7fff0000 + 0x80 * syscallnum
+
+   eax: return value
+   edx, ecx: may be clobbered