///--------------------------------------------------------------------------
/// General definitions.
+// Preprocessor hacks.
+#define STRINGY(x) _STRINGY(x, y)
+#define _STRINGY(x) #x
+#define GLUE(x, y) _GLUE(x, y)
+#define _GLUE(x, y) x##y
+#define _EMPTY
+
// Some useful variables.
.L$_subsec = 0
#define _ENDLIT .text .L$_subsec
#define _LTORG .L$_subsec = .L$_subsec + 2; .text .L$_subsec
+// ELF section types.
+#if __ELF__
+# if CPUFAM_ARMEL
+# define _SECTTY(ty) %ty
+# else
+# define _SECTTY(ty) @ty
+# endif
+#endif
+
+// Section selection.
+#define TEXT .text .L$_subsec
+#if ABI_WIN
+# define RODATA .section .rdata, "dr"
+#elif __ELF__
+# define RODATA .section .rodata, "a", _SECTTY(progbits)
+#else
+# define RODATA TEXT
+#endif
+#define DATA .data
+
// Announcing an external function.
#define FUNC(name) \
.globl F(name); \
ENDFUNC_HOOK(name); \
_LTORG
+// Make a helper function, if necessary.
+#define AUXFN(name) \
+ .ifndef .L$_auxfn_def.name; \
+ .text 7128; \
+ .macro _ENDAUXFN; _ENDAUXFN_TAIL(name); .endm; \
+ FUNC_PREHOOK(name); \
+name:
+#define _ENDAUXFN_TAIL(name) \
+ .purgem _ENDAUXFN; \
+ .text .L$_subsec; \
+ .L$_auxfn_def.name = 1
+#define ENDAUXFN _ENDAUXFN; .endif
+
///--------------------------------------------------------------------------
/// ELF-specific hacking.
// Set the function hooks.
#define FUNC_PREHOOK(_) .balign 16
+// On Windows, arrange to install stack-unwinding data.
+#if CPUFAM_AMD64 && ABI_WIN
+# define FUNC_POSTHOOK(name) .seh_proc name
+# define ENDFUNC_HOOK(_) .seh_endproc
+// Procedures are expected to invoke `.seh_setframe' if necessary, and
+// `.seh_pushreg' and friends, and `.seh_endprologue'.
+#endif
+
// Don't use the wretched AT&T syntax. It's festooned with pointless
// punctuation, and all of the data movement is backwards. Ugh!
.intel_syntax noprefix
// Maybe load GOT address into GOT.
.macro ldgot got=GOTREG
#if WANT_PIC && CPUFAM_X86
- call _where_am_i.\got
- add \got, offset _GLOBAL_OFFSET_TABLE_
-#endif
-.endm
-
-// Maybe build a helper subroutine for `ldgot GOT'.
-.macro gotaux got=GOTREG
-#if WANT_PIC && CPUFAM_X86
- .align 16
-_where_am_i.\got :
+ AUXFN(_ldgot.\got)
mov \got, [esp]
ret
+ ENDAUXFN
+ call _ldgot.\got
+ add \got, offset _GLOBAL_OFFSET_TABLE_
#endif
.endm
# define INTADDR__1(addr, got) addr
#endif
+// Permutations for SIMD instructions. SHUF(D, C, B, A) is an immediate,
+// suitable for use in `pshufd' or `shufpd', which copies element D
+// (0 <= D < 4) of the source to element 3 of the destination, element C to
+// element 2, element B to element 1, and element A to element 0.
+#define SHUF(d, c, b, a) (64*(d) + 16*(c) + 4*(b) + (a))
+
+#endif
+
+#if CPUFAM_X86
+
+.macro _reg.0
+ // Stash GP registers and establish temporary stack frame.
+ pushfd
+ push eax
+ push ecx
+ push edx
+ push ebp
+ mov ebp, esp
+ and esp, ~15
+ sub esp, 512
+ fxsave [esp]
+.endm
+
+.macro _reg.1
+.endm
+
+.macro _reg.2
+.endm
+
+.macro _reg.3 fmt
+ // Print FMT and the other established arguments.
+ lea eax, .L$_reg$msg.\@
+ push eax
+ call printf
+ jmp .L$_reg$cont.\@
+.L$_reg$msg.\@:
+ .ascii ";; \fmt\n\0"
+.L$_reg$cont.\@:
+ mov eax, ebp
+ and eax, ~15
+ sub eax, 512
+ fxrstor [eax]
+ mov esp, ebp
+ pop ebp
+ pop edx
+ pop ecx
+ pop eax
+ popfd
+.endm
+
+.macro msg msg
+ _reg.0
+ _reg.1
+ _reg.2
+ _reg.3 "\msg"
+.endm
+
+.macro reg r, msg
+ _reg.0
+ .ifeqs "\r", "esp"
+ lea eax, [ebp + 20]
+ push eax
+ .else
+ .ifeqs "\r", "ebp"
+ push [ebp]
+ .else
+ push \r
+ .endif
+ .endif
+ _reg.1
+ _reg.2
+ _reg.3 "\msg: \r = %08x"
+.endm
+
+.macro xmmreg r, msg
+ _reg.0
+ _reg.1
+ _reg.2
+ movdqu xmm0, \r
+ pshufd xmm0, xmm0, 0x1b
+ sub esp, 16
+ movdqa [esp], xmm0
+ _reg.3 "\msg: \r = %08x %08x %08x %08x"
+.endm
+
+.macro mmreg r, msg
+ _reg.0
+ _reg.1
+ _reg.2
+ pshufw \r, \r, 0x4e
+ sub esp, 8
+ movq [esp], \r
+ _reg.3 "\msg: \r = %08x %08x"
+.endm
+
+.macro freg i, msg
+ _reg.0
+ _reg.1
+ _reg.2
+ finit
+ fldt [esp + 32 + 16*\i]
+ sub esp, 12
+ fstpt [esp]
+ _reg.3 "\msg: st(\i) = %.20Lg"
+.endm
+
+.macro fxreg i, msg
+ _reg.0
+ _reg.1
+ _reg.2
+ finit
+ fldt [esp + 32 + 16*\i]
+ sub esp, 12
+ fstpt [esp]
+ _reg.3 "\msg: st(\i) = %La"
+.endm
+
#endif
///--------------------------------------------------------------------------
# define SIZE_OBJ(name)
#endif
+#if __ELF__ && defined(WANT_EXECUTABLE_STACK)
+ .pushsection .note.GNU-stack, "", _SECTTY(progbits)
+ .popsection
+#endif
+
///----- That's all, folks --------------------------------------------------
~mdw / catacomb / blobdiff