-/*
- * mach-support-x86.c: mach support for x86
+/**
+ * \file
+ * mach support for x86
*
* Authors:
* Geoff Norton (gnorton@novell.com)
#include "utils/mono-sigcontext.h"
#include "mach-support.h"
+// For reg numbers
+#include <mono/arch/amd64/amd64-codegen.h>
+
+/* Known offsets used for TLS storage*/
+
+/* All OSX versions up to 10.8 */
+#define TLS_VECTOR_OFFSET_CATS 0x48
+#define TLS_VECTOR_OFFSET_10_9 0xb0
+#define TLS_VECTOR_OFFSET_10_11 0x100
+
+
+/* This is 2 slots less than the known low */
+#define TLS_PROBE_LOW_WATERMARK 0x40
+/* This is 28 slots above the know high, which is more than the known high-low*/
+#define TLS_PROBE_HIGH_WATERMARK 0x120
+
+
+static int tls_vector_offset;
+
void *
mono_mach_arch_get_ip (thread_state_t state)
{
}
void
-mono_mach_arch_thread_state_to_mcontext (thread_state_t state, mcontext_t context)
+mono_mach_arch_thread_states_to_mcontext (thread_state_t state, thread_state_t fpstate, void *context)
{
x86_thread_state32_t *arch_state = (x86_thread_state32_t *) state;
+ x86_float_state32_t *arch_fpstate = (x86_float_state32_t *) fpstate;
struct __darwin_mcontext32 *ctx = (struct __darwin_mcontext32 *) context;
-
ctx->__ss = *arch_state;
+ ctx->__fs = *arch_fpstate;
}
void
-mono_mach_arch_mcontext_to_thread_state (mcontext_t context, thread_state_t state)
+mono_mach_arch_mcontext_to_thread_states (void *context, thread_state_t state, thread_state_t fpstate)
{
x86_thread_state32_t *arch_state = (x86_thread_state32_t *) state;
+ x86_float_state32_t *arch_fpstate = (x86_float_state32_t *) fpstate;
struct __darwin_mcontext32 *ctx = (struct __darwin_mcontext32 *) context;
-
*arch_state = ctx->__ss;
+ *arch_fpstate = ctx->__fs;
+}
+
+void
+mono_mach_arch_thread_states_to_mono_context (thread_state_t state, thread_state_t fpstate, MonoContext *context)
+{
+ x86_thread_state32_t *arch_state = (x86_thread_state32_t *) state;
+ x86_float_state32_t *arch_fpstate = (x86_float_state32_t *) state;
+ context->eax = arch_state->__eax;
+ context->ebx = arch_state->__ebx;
+ context->ecx = arch_state->__ecx;
+ context->edx = arch_state->__edx;
+ context->ebp = arch_state->__ebp;
+ context->esp = arch_state->__esp;
+ context->esi = arch_state->__edi;
+ context->edi = arch_state->__esi;
+ context->eip = arch_state->__eip;
+ context->fregs [X86_XMM0] = arch_fpstate->__fpu_xmm0;
+ context->fregs [X86_XMM1] = arch_fpstate->__fpu_xmm1;
+ context->fregs [X86_XMM2] = arch_fpstate->__fpu_xmm2;
+ context->fregs [X86_XMM3] = arch_fpstate->__fpu_xmm3;
+ context->fregs [X86_XMM4] = arch_fpstate->__fpu_xmm4;
+ context->fregs [X86_XMM5] = arch_fpstate->__fpu_xmm5;
+ context->fregs [X86_XMM6] = arch_fpstate->__fpu_xmm6;
+ context->fregs [X86_XMM7] = arch_fpstate->__fpu_xmm7;
}
int
return sizeof (x86_thread_state32_t);
}
+int
+mono_mach_arch_get_thread_fpstate_size ()
+{
+ return sizeof (x86_float_state32_t);
+}
+
kern_return_t
-mono_mach_arch_get_thread_state (thread_port_t thread, thread_state_t state, mach_msg_type_number_t *count)
+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)
{
+#if defined(HOST_WATCHOS)
+ g_error ("thread_get_state() is not supported by this platform");
+#else
x86_thread_state32_t *arch_state = (x86_thread_state32_t *) state;
+ x86_float_state32_t *arch_fpstate = (x86_float_state32_t *) fpstate;
kern_return_t ret;
*count = x86_THREAD_STATE32_COUNT;
+ *fpcount = x86_FLOAT_STATE32_COUNT;
- ret = thread_get_state (thread, x86_THREAD_STATE32, (thread_state_t) arch_state, count);
+ ret = thread_get_state (thread, x86_THREAD_STATE32, (thread_state_t)arch_state, count);
+ if (ret != KERN_SUCCESS)
+ return ret;
+ ret = thread_get_state (thread, x86_FLOAT_STATE32, (thread_state_t)arch_fpstate, fpcount);
return ret;
+#endif
}
kern_return_t
-mono_mach_arch_set_thread_state (thread_port_t thread, thread_state_t state, mach_msg_type_number_t count)
+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)
{
- return thread_set_state (thread, x86_THREAD_STATE32, state, count);
+#if defined(HOST_WATCHOS)
+ g_error ("thread_set_state() is not supported by this platform");
+#else
+ kern_return_t ret;
+ ret = thread_set_state (thread, x86_THREAD_STATE32, state, count);
+ if (ret != KERN_SUCCESS)
+ return ret;
+ ret = thread_set_state (thread, x86_FLOAT_STATE32, fpstate, fpcount);
+ return ret;
+#endif
}
void *
mono_mach_get_tls_address_from_thread (pthread_t thread, pthread_key_t key)
{
/* OSX stores TLS values in a hidden array inside the pthread_t structure
- * They are keyed off a giant array offset 0x48 into the pointer. This value
+ * They are keyed off a giant array from a known offset into the pointer. This value
* is baked into their pthread_getspecific implementation
*/
intptr_t *p = (intptr_t *) thread;
- intptr_t **tsd = (intptr_t **) ((char*)p + 0x48);
+ intptr_t **tsd = (intptr_t **) ((char*)p + tls_vector_offset);
+ g_assert (tls_vector_offset != -1);
return (void *) &tsd [key];
}
return *(void**)mono_mach_get_tls_address_from_thread (thread, key);
}
+void
+mono_mach_init (pthread_key_t key)
+{
+ int i;
+ void *old_value = pthread_getspecific (key);
+ void *canary = (void*)0xDEADBEEFu;
+
+ pthread_key_create (&key, NULL);
+ g_assert (old_value != canary);
+
+ pthread_setspecific (key, canary);
+
+ /*First we probe for cats*/
+ tls_vector_offset = TLS_VECTOR_OFFSET_CATS;
+ if (mono_mach_arch_get_tls_value_from_thread (pthread_self (), key) == canary)
+ goto ok;
+
+ tls_vector_offset = TLS_VECTOR_OFFSET_10_9;
+ if (mono_mach_arch_get_tls_value_from_thread (pthread_self (), key) == canary)
+ goto ok;
+
+ tls_vector_offset = TLS_VECTOR_OFFSET_10_11;
+ if (mono_mach_arch_get_tls_value_from_thread (pthread_self (), key) == canary)
+ goto ok;
+
+ /*Fallback to scanning a large range of offsets*/
+ for (i = TLS_PROBE_LOW_WATERMARK; i <= TLS_PROBE_HIGH_WATERMARK; i += 4) {
+ tls_vector_offset = i;
+ if (mono_mach_arch_get_tls_value_from_thread (pthread_self (), key) == canary) {
+ g_warning ("Found new TLS offset at %d", i);
+ goto ok;
+ }
+ }
+
+ tls_vector_offset = -1;
+ g_warning ("could not discover the mach TLS offset");
+ok:
+ pthread_setspecific (key, old_value);
+}
#endif
projects / mono.git / blobdiff