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#include "include/ghcconfig.h"
#define WS 4
#define RETVAL_OFF 5
// Mathces layout of struct CCallAdjustor in Nativei386.c
#define HPTR_OFF (0*WS)
#define WPTR_OFF (1*WS)
#define FRAME_SIZE_OFF (2*WS)
#define ARGUMENT_WORDS_OFF (3*WS)
#if defined(LEADING_UNDERSCORE)
#define CSYM(x) _ ## x
#else
#define CSYM(x) x
#endif
#define DECLARE_CSYM(x) \
.globl CSYM(x) ; \
CSYM(x):
DECLARE_CSYM(ccall_adjustor)
// At entry %eax contains a pointer to the CCallContext
// Record a frame pointer. Paired with the `leave` below.
pushl %ebp
movl %esp, %ebp
subl FRAME_SIZE_OFF(%eax), %esp
// Save %esi and %edi as we need to clobber them to perform the shuffle
pushl %esi
pushl %edi
// Shuffle the stack down...
leal 8(%ebp), %esi
leal 12(%esp), %edi
movl ARGUMENT_WORDS_OFF(%eax), %ecx
rep
movsl
// Restore %edi and %esi
popl %edi
popl %esi
// Perform the call
pushl HPTR_OFF(%eax)
call *WPTR_OFF(%eax)
leave
ret
/* mark stack as nonexecutable */
#if defined(__linux__) && defined(__ELF__)
.section .note.GNU-stack,"",@progbits
#endif
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