6 * Geoff Norton (gnorton@novell.com)
8 * (C) 2010 Novell, Inc.
17 #include "utils/mono-sigcontext.h"
18 #include "mach-support.h"
21 #include <mono/arch/amd64/amd64-codegen.h>
23 /* Known offsets used for TLS storage*/
25 /* All OSX versions up to 10.8 */
26 #define TLS_VECTOR_OFFSET_CATS 0x48
27 #define TLS_VECTOR_OFFSET_10_9 0xb0
28 #define TLS_VECTOR_OFFSET_10_11 0x100
31 /* This is 2 slots less than the known low */
32 #define TLS_PROBE_LOW_WATERMARK 0x40
33 /* This is 28 slots above the know high, which is more than the known high-low*/
34 #define TLS_PROBE_HIGH_WATERMARK 0x120
37 static int tls_vector_offset;
40 mono_mach_arch_get_ip (thread_state_t state)
42 x86_thread_state32_t *arch_state = (x86_thread_state32_t *) state;
44 return (void *) arch_state->__eip;
48 mono_mach_arch_get_sp (thread_state_t state)
50 x86_thread_state32_t *arch_state = (x86_thread_state32_t *) state;
52 return (void *) arch_state->__esp;
56 mono_mach_arch_get_mcontext_size ()
58 return sizeof (struct __darwin_mcontext32);
62 mono_mach_arch_thread_states_to_mcontext (thread_state_t state, thread_state_t fpstate, void *context)
64 x86_thread_state32_t *arch_state = (x86_thread_state32_t *) state;
65 x86_float_state32_t *arch_fpstate = (x86_float_state32_t *) fpstate;
66 struct __darwin_mcontext32 *ctx = (struct __darwin_mcontext32 *) context;
67 ctx->__ss = *arch_state;
68 ctx->__fs = *arch_fpstate;
72 mono_mach_arch_mcontext_to_thread_states (void *context, thread_state_t state, thread_state_t fpstate)
74 x86_thread_state32_t *arch_state = (x86_thread_state32_t *) state;
75 x86_float_state32_t *arch_fpstate = (x86_float_state32_t *) fpstate;
76 struct __darwin_mcontext32 *ctx = (struct __darwin_mcontext32 *) context;
77 *arch_state = ctx->__ss;
78 *arch_fpstate = ctx->__fs;
82 mono_mach_arch_thread_states_to_mono_context (thread_state_t state, thread_state_t fpstate, MonoContext *context)
84 x86_thread_state32_t *arch_state = (x86_thread_state32_t *) state;
85 x86_float_state32_t *arch_fpstate = (x86_float_state32_t *) state;
86 context->eax = arch_state->__eax;
87 context->ebx = arch_state->__ebx;
88 context->ecx = arch_state->__ecx;
89 context->edx = arch_state->__edx;
90 context->ebp = arch_state->__ebp;
91 context->esp = arch_state->__esp;
92 context->esi = arch_state->__edi;
93 context->edi = arch_state->__esi;
94 context->eip = arch_state->__eip;
95 context->fregs [X86_XMM0] = arch_fpstate->__fpu_xmm0;
96 context->fregs [X86_XMM1] = arch_fpstate->__fpu_xmm1;
97 context->fregs [X86_XMM2] = arch_fpstate->__fpu_xmm2;
98 context->fregs [X86_XMM3] = arch_fpstate->__fpu_xmm3;
99 context->fregs [X86_XMM4] = arch_fpstate->__fpu_xmm4;
100 context->fregs [X86_XMM5] = arch_fpstate->__fpu_xmm5;
101 context->fregs [X86_XMM6] = arch_fpstate->__fpu_xmm6;
102 context->fregs [X86_XMM7] = arch_fpstate->__fpu_xmm7;
106 mono_mach_arch_get_thread_state_size ()
108 return sizeof (x86_thread_state32_t);
112 mono_mach_arch_get_thread_fpstate_size ()
114 return sizeof (x86_float_state32_t);
118 mono_mach_arch_get_thread_states (thread_port_t thread, thread_state_t state, mach_msg_type_number_t *count, thread_state_t fpstate, mach_msg_type_number_t *fpcount)
120 #if defined(HOST_WATCHOS)
121 g_error ("thread_get_state() is not supported by this platform");
123 x86_thread_state32_t *arch_state = (x86_thread_state32_t *) state;
124 x86_float_state32_t *arch_fpstate = (x86_float_state32_t *) fpstate;
127 *count = x86_THREAD_STATE32_COUNT;
128 *fpcount = x86_FLOAT_STATE32_COUNT;
130 ret = thread_get_state (thread, x86_THREAD_STATE32, (thread_state_t)arch_state, count);
131 if (ret != KERN_SUCCESS)
134 ret = thread_get_state (thread, x86_FLOAT_STATE32, (thread_state_t)arch_fpstate, fpcount);
140 mono_mach_arch_set_thread_states (thread_port_t thread, thread_state_t state, mach_msg_type_number_t count, thread_state_t fpstate, mach_msg_type_number_t fpcount)
142 #if defined(HOST_WATCHOS)
143 g_error ("thread_set_state() is not supported by this platform");
146 ret = thread_set_state (thread, x86_THREAD_STATE32, state, count);
147 if (ret != KERN_SUCCESS)
149 ret = thread_set_state (thread, x86_FLOAT_STATE32, fpstate, fpcount);
155 mono_mach_get_tls_address_from_thread (pthread_t thread, pthread_key_t key)
157 /* OSX stores TLS values in a hidden array inside the pthread_t structure
158 * They are keyed off a giant array from a known offset into the pointer. This value
159 * is baked into their pthread_getspecific implementation
161 intptr_t *p = (intptr_t *) thread;
162 intptr_t **tsd = (intptr_t **) ((char*)p + tls_vector_offset);
163 g_assert (tls_vector_offset != -1);
165 return (void *) &tsd [key];
169 mono_mach_arch_get_tls_value_from_thread (pthread_t thread, guint32 key)
171 return *(void**)mono_mach_get_tls_address_from_thread (thread, key);
175 mono_mach_init (pthread_key_t key)
178 void *old_value = pthread_getspecific (key);
179 void *canary = (void*)0xDEADBEEFu;
181 pthread_key_create (&key, NULL);
182 g_assert (old_value != canary);
184 pthread_setspecific (key, canary);
186 /*First we probe for cats*/
187 tls_vector_offset = TLS_VECTOR_OFFSET_CATS;
188 if (mono_mach_arch_get_tls_value_from_thread (pthread_self (), key) == canary)
191 tls_vector_offset = TLS_VECTOR_OFFSET_10_9;
192 if (mono_mach_arch_get_tls_value_from_thread (pthread_self (), key) == canary)
195 tls_vector_offset = TLS_VECTOR_OFFSET_10_11;
196 if (mono_mach_arch_get_tls_value_from_thread (pthread_self (), key) == canary)
199 /*Fallback to scanning a large range of offsets*/
200 for (i = TLS_PROBE_LOW_WATERMARK; i <= TLS_PROBE_HIGH_WATERMARK; i += 4) {
201 tls_vector_offset = i;
202 if (mono_mach_arch_get_tls_value_from_thread (pthread_self (), key) == canary) {
203 g_warning ("Found new TLS offset at %d", i);
208 tls_vector_offset = -1;
209 g_warning ("could not discover the mach TLS offset");
211 pthread_setspecific (key, old_value);