xbox: Add setjmp

XboxDev · Oct 1, 2019 · ae5c0a3 · ae5c0a3
1 parent c06b9d2
commit ae5c0a3
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diff --git a/platform/xbox/functions/setjmp/longjmp.s b/platform/xbox/functions/setjmp/longjmp.s
@@ -0,0 +1,27 @@
+.text
+
+/*
+Buffer layout:
+     0: unsigned long ebp
+     4: unsigned long ebx
+     8: unsigned long edi
+    12: unsigned long esi
+    16: unsigned long esp
+    20: unsigned long eip
+*/
+
+.globl _longjmp
+_longjmp:
+    movl 4(%esp), %ecx
+    movl 8(%esp), %eax
+
+    movl (%ecx), %ebp
+    movl 4(%ecx), %ebx
+    movl 8(%ecx), %edi
+    movl 12(%ecx), %esi
+    movl 16(%ecx), %esp
+    movl 20(%ecx), %edx
+    testl %eax, %eax
+    jnz .r
+    incl %eax
+.r: jmp *%edx
diff --git a/platform/xbox/functions/setjmp/setjmp.s b/platform/xbox/functions/setjmp/setjmp.s
@@ -0,0 +1,27 @@
+.text
+
+/*
+Buffer layout:
+     0: unsigned long ebp
+     4: unsigned long ebx
+     8: unsigned long edi
+    12: unsigned long esi
+    16: unsigned long esp
+    20: unsigned long eip
+*/
+
+.globl _setjmp
+_setjmp:
+    movl 4(%esp), %eax
+
+    movl %ebp, (%eax)
+    movl %ebx, 4(%eax)
+    movl %edi, 8(%eax)
+    movl %esi, 12(%eax)
+    leal 4(%esp), %ecx
+    movl %ecx, 16(%eax)
+    movl (%esp), %ecx
+    movl %ecx, 20(%eax)
+
+    xorl %eax, %eax
+    ret
diff --git a/platform/xbox/include/setjmp.h b/platform/xbox/include/setjmp.h
@@ -0,0 +1,26 @@
+#ifndef _PDCLIB_SETJMP_H
+#define _PDCLIB_SETJMP_H _PDCLIB_SETJMP_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*
+Buffer layout:
+     0: unsigned long ebp
+     4: unsigned long ebx
+     8: unsigned long edi
+    12: unsigned long esi
+    16: unsigned long esp
+    20: unsigned long eip
+*/
+typedef unsigned long jmp_buf[6];
+
+int setjmp( jmp_buf env );
+_Noreturn void longjmp( jmp_buf env, int val );
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif