src/Unix/ppc_asm.tmpl

/* Define usage of "reserved" registers */
#if defined(__linux__)
#define SYSTEM_CLOBBERS_R2      1       /* Pointer to Thread Local Storage */
#define SYSTEM_CLOBBERS_R13     1       /* Pointer to .sdata section */
#endif

#ifdef __ASSEMBLY__
/* Helper macros */
#ifdef SYSTEM_CLOBBERS_R2
#define RESTORE_SYSTEM_R2       lwz r2,XLM_TOC(0)
#define SAVE_SYSTEM_R2          stw r2,XLM_TOC(0)
#else
#define RESTORE_SYSTEM_R2
#define SAVE_SYSTEM_R2
#endif
#ifdef SYSTEM_CLOBBERS_R13
#define RESTORE_SYSTEM_R13      lwz r13,XLM_R13(0)
#define SAVE_SYSTEM_R13         stw r13,XLM_R13(0)
#else
#define RESTORE_SYSTEM_R13
#define SAVE_SYSTEM_R13
#endif

/* Apple assembler perticularities */
#if (defined(__APPLE__) && defined(__MACH__))
#define C_SYMBOL_NAME(NAME)     _ ## NAME
#define ASM_MACRO_END           .endmacro
#endif

/* Defaults for GNU assembler */
#ifndef ASM_MACRO_START
#define ASM_MACRO_START         .macro
#endif
#ifndef ASM_MACRO_END
#define ASM_MACRO_END           .endm
#endif
#ifndef C_SYMBOL_NAME
#define C_SYMBOL_NAME(NAME)     NAME
#endif
#ifndef ASM_GLOBAL_DIRECTIVE
#define ASM_GLOBAL_DIRECTIVE    .globl
#endif

/* Register names */
#if defined(__linux__) || defined(__NetBSD__)
#define r0      0
#define r1      1
#define r2      2
#define r3      3
#define r4      4
#define r5      5
#define r6      6
#define r7      7
#define r8      8
#define r9      9
#define r10     10
#define r11     11
#define r12     12
#define r13     13
#define r14     14
#define r15     15
#define r16     16
#define r17     17
#define r18     18
#define r19     19
#define r20     20
#define r21     21
#define r22     22
#define r23     23
#define r24     24
#define r25     25
#define r26     26
#define r27     27
#define r28     28
#define r29     29
#define r30     30
#define r31     31
#endif

#if defined(__linux__) || defined(__NetBSD__)
#define f0      0
#define f1      1
#define f2      2
#define f3      3
#define f4      4
#define f5      5
#define f6      6
#define f7      7
#define f8      8
#define f9      9
#define f10     10
#define f11     11
#define f12     12
#define f13     13
#define f14     14
#define f15     15
#define f16     16
#define f17     17
#define f18     18
#define f19     19
#define f20     20
#define f21     21
#define f22     22
#define f23     23
#define f24     24
#define f25     25
#define f26     26
#define f27     27
#define f28     28
#define f29     29
#define f30     30
#define f31     31
#endif
#endif
Revision:	1.5
Committed:	2005-02-27T21:52:06Z (19 years, 3 months ago) by gbeauche
Branch:	MAIN
Changes since 1.4:	+25 -0 lines
Log Message:	Fix native Linux/ppc with recent enough glibc that supports TLS; r2 is used in that case. Tell me if I broke other arches, e.g. r13 is no longer saved in Video and Ethernet stubs, though it seems to be OK. Colateral feature: SheepShaver should now run on Linux/ppc64 with relevant 32-bit runtime. Native Linux/ppc64 support is harder as low mem globals are 32-bit in mind and e.g. the TLS register there is %r13, %r2 is the TOC (PowerOpen/AIX ABI)
#	User	Rev	Content
1	gbeauche	1.5	/* Define usage of "reserved" registers */
2			#if defined(__linux__)
3			#define SYSTEM_CLOBBERS_R2 1 /* Pointer to Thread Local Storage */
4			#define SYSTEM_CLOBBERS_R13 1 /* Pointer to .sdata section */
5			#endif
6
7			#ifdef __ASSEMBLY__
8			/* Helper macros */
9			#ifdef SYSTEM_CLOBBERS_R2
10			#define RESTORE_SYSTEM_R2 lwz r2,XLM_TOC(0)
11			#define SAVE_SYSTEM_R2 stw r2,XLM_TOC(0)
12			#else
13			#define RESTORE_SYSTEM_R2
14			#define SAVE_SYSTEM_R2
15			#endif
16			#ifdef SYSTEM_CLOBBERS_R13
17			#define RESTORE_SYSTEM_R13 lwz r13,XLM_R13(0)
18			#define SAVE_SYSTEM_R13 stw r13,XLM_R13(0)
19			#else
20			#define RESTORE_SYSTEM_R13
21			#define SAVE_SYSTEM_R13
22			#endif
23
24			/* Apple assembler perticularities */
25	gbeauche	1.2	#if (defined(__APPLE__) && defined(__MACH__))
26	gbeauche	1.3	#define C_SYMBOL_NAME(NAME) _ ## NAME
27			#define ASM_MACRO_END .endmacro
28			#endif
29
30			/* Defaults for GNU assembler */
31			#ifndef ASM_MACRO_START
32			#define ASM_MACRO_START .macro
33			#endif
34			#ifndef ASM_MACRO_END
35			#define ASM_MACRO_END .endm
36	gbeauche	1.2	#endif
37			#ifndef C_SYMBOL_NAME
38	gbeauche	1.3	#define C_SYMBOL_NAME(NAME) NAME
39	gbeauche	1.2	#endif
40			#ifndef ASM_GLOBAL_DIRECTIVE
41	gbeauche	1.3	#define ASM_GLOBAL_DIRECTIVE .globl
42	gbeauche	1.2	#endif
43
44	cebix	1.1	/* Register names */
45	gbeauche	1.4	#if defined(__linux__) \|\| defined(__NetBSD__)
46	cebix	1.1	#define r0 0
47			#define r1 1
48			#define r2 2
49			#define r3 3
50			#define r4 4
51			#define r5 5
52			#define r6 6
53			#define r7 7
54			#define r8 8
55			#define r9 9
56			#define r10 10
57			#define r11 11
58			#define r12 12
59			#define r13 13
60			#define r14 14
61			#define r15 15
62			#define r16 16
63			#define r17 17
64			#define r18 18
65			#define r19 19
66			#define r20 20
67			#define r21 21
68			#define r22 22
69			#define r23 23
70			#define r24 24
71			#define r25 25
72			#define r26 26
73			#define r27 27
74			#define r28 28
75			#define r29 29
76			#define r30 30
77			#define r31 31
78	gbeauche	1.2	#endif
79	cebix	1.1
80	gbeauche	1.4	#if defined(__linux__) \|\| defined(__NetBSD__)
81	cebix	1.1	#define f0 0
82			#define f1 1
83			#define f2 2
84			#define f3 3
85			#define f4 4
86			#define f5 5
87			#define f6 6
88			#define f7 7
89			#define f8 8
90			#define f9 9
91			#define f10 10
92			#define f11 11
93			#define f12 12
94			#define f13 13
95			#define f14 14
96			#define f15 15
97			#define f16 16
98			#define f17 17
99			#define f18 18
100			#define f19 19
101			#define f20 20
102			#define f21 21
103			#define f22 22
104			#define f23 23
105			#define f24 24
106			#define f25 25
107			#define f26 26
108			#define f27 27
109			#define f28 28
110			#define f29 29
111			#define f30 30
112			#define f31 31
113	gbeauche	1.2	#endif
114	gbeauche	1.5	#endif