refactor: elf parsing utility and exec related

[lunaix-os.git] / lunaix-os / includes / arch / x86 / i386_abi.h

diff --git a/lunaix-os/includes/arch/x86/i386_abi.h b/lunaix-os/includes/arch/x86/i386_abi.h
new file mode 100644 (file)
index 0000000..22481c9
--- /dev/null
+++ b/lunaix-os/includes/arch/x86/i386_abi.h
@@ -0,0 +1,24 @@
+#ifndef __LUNAIX_I386ABI_H
+#define __LUNAIX_I386ABI_H
+
+#define store_retval(retval) __current->intr_ctx.registers.eax = (retval)
+
+#define store_retval_to(proc, retval) (proc)->intr_ctx.registers.eax = (retval)
+
+#define j_usr(sp, pc)                                                          \
+    asm volatile("movw %0, %%ax\n"                                             \
+                 "movw %%ax, %%es\n"                                           \
+                 "movw %%ax, %%ds\n"                                           \
+                 "movw %%ax, %%fs\n"                                           \
+                 "movw %%ax, %%gs\n"                                           \
+                 "pushl %0\n"                                                  \
+                 "pushl %1\n"                                                  \
+                 "pushl %2\n"                                                  \
+                 "pushl %3\n"                                                  \
+                 "retf" ::"i"(UDATA_SEG),                                      \
+                 "r"(sp),                                                      \
+                 "i"(UCODE_SEG),                                               \
+                 "r"(pc)                                                       \
+                 : "eax", "memory");
+
+#endif /* __LUNAIX_ABI_H */