1 /* $NetBSD: frame.h,v 1.4 2001/12/04 00:05:05 darrenr Exp $ */
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44 * @(#)frame.h 8.1 (Berkeley) 6/11/93
47 #if defined(_KERNEL_OPT)
48 #include "opt_sparc_arch.h"
52 * Sparc stack frame format.
54 * Note that the contents of each stack frame may be held only in
55 * machine register windows. In order to get an accurate picture
56 * of the frame, you must first force the kernel to write any such
57 * windows to the stack.
62 int32_t fr_local[8]; /* space to save locals (%l0..%l7) */
63 int32_t fr_arg[6]; /* space to save arguments (%i0..%i5) */
64 struct frame *fr_fp; /* space to save frame pointer (%i6) */
65 int32_t fr_pc; /* space to save return pc (%i7) */
67 * SunOS reserves another 8 words here; this is pointless
68 * but we do it for compatibility.
70 int32_t fr_xxx; /* `structure return pointer' (unused) */
71 int32_t fr_argd[6]; /* `arg dump area' (lunacy) */
72 int32_t fr_argx[1]; /* arg extension (args 7..n; variable size) */
76 int32_t fr_local[8]; /* space to save locals (%l0..%l7) */
77 int32_t fr_arg[6]; /* space to save arguments (%i0..%i5) */
78 u_int32_t fr_fp; /* space to save frame pointer (%i6) */
79 u_int32_t fr_pc; /* space to save return pc (%i7) */
81 * SunOS reserves another 8 words here; this is pointless
82 * but we do it for compatibility.
84 int32_t fr_xxx; /* `structure return pointer' (unused) */
85 int32_t fr_argd[6]; /* `arg dump area' (lunacy) */
86 int32_t fr_argx[1]; /* arg extension (args 7..n; variable size) */
92 * CCFSZ (C Compiler Frame SiZe) is the size of a stack frame required if
93 * a function is to call C code. It should be just 64, but Sun defined
94 * their frame with space to hold arguments 0 through 5 (plus some junk),
95 * and varargs routines (such as kprintf) demand this, and gcc uses this
96 * area at times anyway.
101 * Sparc v9 stack frame format.
103 * Note that the contents of each stack frame may be held only in
104 * machine register windows. In order to get an accurate picture
105 * of the frame, you must first force the kernel to write any such
106 * windows to the stack.
108 * V9 frames have an odd bias, so you can tall a v9 frame from
109 * a v8 frame by testing the stack pointer's lsb.
111 #if !defined(_LOCORE) && !defined(_LIBC)
113 int64_t fr_local[8]; /* space to save locals (%l0..%l7) */
114 int64_t fr_arg[6]; /* space to save arguments (%i0..%i5) */
115 u_int64_t fr_fp; /* space to save frame pointer (%i6) */
116 u_int64_t fr_pc; /* space to save return pc (%i7) */
118 * SVR4 reserves a bunch of extra stuff.
120 int64_t fr_argd[6]; /* `register save area' (lunacy) */
121 int64_t fr_argx[0]; /* arg extension (args 7..n; variable size) */
124 #define v9next_frame(f) ((struct frame64*)(f->fr_fp+BIAS))
128 * CC64FSZ (C Compiler 64-bit Frame SiZe) is the size of a stack frame used
129 * by the compiler in 64-bit mode. It is (16)*8; space for 8 ins, 8 outs.
134 * v9 stacks all have a bias of 2047 added to the %sp and %fp, so you can easily
135 * detect it by testing the register for an odd value. Why 2K-1 I don't know.
137 #define BIAS (2048-1)