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[PATCH v1 1/2] syscalls: Allgemeine Syscall-Funktionen
+ Für den Aufruf von Syscalls existiert bisher für jeden Syscall ein
eigenes Stück Assemblercode. Die Assemblercode sind zueinander sehr
aenlich und koennen gut über mehrere allgemeine Funktionen
zusammengefasst werden. Dieser Commit implementiert hierzu acht neue
Makros für den Aufruf von Syscalls mit biszu 6 Argumente.
Signed-off-by: Nico Mayer <mayerNico256@xxxxxxxxx>
---
src/include/arch/i386/syscallx.h | 109 +++++++++++++++++++++++++++++++
1 file changed, 109 insertions(+)
create mode 100644 src/include/arch/i386/syscallx.h
diff --git a/src/include/arch/i386/syscallx.h b/src/include/arch/i386/syscallx.h
new file mode 100644
index 00000000..c162f229
--- /dev/null
+++ b/src/include/arch/i386/syscallx.h
@@ -0,0 +1,109 @@
+#ifndef SYSCALLS_H
+#define SYSCALLS_H
+
+#define SYSCALL0_TWO_RESULTS(SYSCALL_NO, RESULT1, RESULT2) \
+ asm volatile ( \
+ "mov %2, %%eax;" \
+ "int $0x30;" \
+ : "=a" (RESULT1), \
+ "=d" (RESULT2) \
+ : "i" (SYSCALL_NO) : "memory")
+
+#define SYSCALL0(SYSCALL_NO, RESULT) \
+ asm volatile ( \
+ "mov %1, %%eax;" \
+ "int $0x30;" \
+ : "=a" (RESULT) \
+ : "i" (SYSCALL_NO) : "memory")
+
+#define SYSCALL1(SYSCALL_NO, ARG1, RESULT) \
+ asm volatile ( \
+ "pushl %2;" \
+ "mov %1, %%eax;" \
+ "int $0x30;" \
+ "add $0x4, %%esp;" \
+ : "=a" (RESULT) \
+ : "i" (SYSCALL_NO), \
+ "r" (ARG1) : "memory")
+
+#define SYSCALL2(SYSCALL_NO, ARG1, ARG2, RESULT) \
+ asm volatile ( \
+ "push %3;" \
+ "push %2;" \
+ "mov %1, %%eax;" \
+ "int $0x30;" \
+ "add $0x8, %%esp;" \
+ : "=a" (RESULT) \
+ : "i" (SYSCALL_NO), \
+ "r" (ARG1), \
+ "r" (ARG2) : "memory")
+
+#define SYSCALL3(SYSCALL_NO, ARG1, ARG2, ARG3, RESULT) \
+ asm volatile ( \
+ "push %4;" \
+ "push %3;" \
+ "push %2;" \
+ "mov %1, %%eax;" \
+ "int $0x30;" \
+ "add $0xc, %%esp;" \
+ : "=a" (RESULT) \
+ : "i" (SYSCALL_NO), \
+ "r" (ARG1), \
+ "r" (ARG2), \
+ "r" (ARG3) : "memory")
+
+#define SYSCALL4(SYSCALL_NO, ARG1, ARG2, ARG3, ARG4, RESULT) \
+ asm volatile ( \
+ "push %5;" \
+ "push %4;" \
+ "push %3;" \
+ "push %2;" \
+ "mov %1, %%eax;" \
+ "int $0x30;" \
+ "add $0x10, %%esp;" \
+ : "=a" (RESULT) \
+ : "i" (SYSCALL_NO), \
+ "r" (ARG1), \
+ "r" (ARG2), \
+ "r" (ARG3), \
+ "r" (ARG4) : "memory")
+
+#define SYSCALL5(SYSCALL_NO, ARG1, ARG2, ARG3, ARG4, ARG5, RESULT) \
+ asm volatile ( \
+ "push %6;" \
+ "push %5;" \
+ "push %4;" \
+ "push %3;" \
+ "push %2;" \
+ "mov %1, %%eax;" \
+ "int $0x30;" \
+ "add $0x14, %%esp;" \
+ : "=a" (RESULT) \
+ : "i" (SYSCALL_NO), \
+ "r" (ARG1), \
+ "r" (ARG2), \
+ "r" (ARG3), \
+ "r" (ARG4), \
+ "r" (ARG5) : "memory")
+
+#define SYSCALL6(SYSCALL_NO, ARG1, ARG2, ARG3, ARG4, ARG5, ARG6, RESULT) \
+ asm volatile ( \
+ "push %7;" \
+ "push %6;" \
+ "push %5;" \
+ "push %4;" \
+ "push %3;" \
+ "push %2;" \
+ "mov %1, %%eax;" \
+ "int $0x30;" \
+ "add $0x18, %%esp;" \
+ : "=a" (RESULT) \
+ : "i" (SYSCALL_NO), \
+ "r" (ARG1), \
+ "r" (ARG2), \
+ "r" (ARG3), \
+ "r" (ARG4), \
+ "r" (ARG5), \
+ "g" (ARG6) : "memory")
+
+#endif /* SYSCALLS_H */
--
2.29.2