MonoContext *new_ctx, MonoLMF **lmf, gboolean *managed)
{
MonoJitInfo *ji;
- int i;
gpointer ip = MONO_CONTEXT_GET_IP (ctx);
/* Avoid costly table lookup during stack overflow */
*new_ctx = *ctx;
if (ji != NULL) {
- int offset;
- gboolean omit_fp = (ji->used_regs & (1 << 31)) > 0;
+ gssize regs [MONO_MAX_IREGS + 1];
+ guint8 *cfa;
+ guint32 unwind_info_len;
+ guint8 *unwind_info;
if (managed)
if (!ji->method->wrapper_type)
*managed = TRUE;
- /*
- * If a method has save_lmf set, then register save/restore code is not generated
- * by the JIT, so we have to restore callee saved registers from the lmf.
- */
- if (ji->method->save_lmf) {
- MonoLMF *lmf_addr;
-
- /*
- * *lmf might not point to the LMF pushed by this method, so compute the LMF
- * address instead.
- */
- if (omit_fp)
- lmf_addr = (MonoLMF*)ctx->rsp;
- else
- lmf_addr = (MonoLMF*)(ctx->rbp - sizeof (MonoLMF));
-
- new_ctx->rbp = lmf_addr->rbp;
- new_ctx->rbx = lmf_addr->rbx;
- new_ctx->r12 = lmf_addr->r12;
- new_ctx->r13 = lmf_addr->r13;
- new_ctx->r14 = lmf_addr->r14;
- new_ctx->r15 = lmf_addr->r15;
-#ifdef PLATFORM_WIN32
- new_ctx->rdi = lmf_addr->rdi;
- new_ctx->rsi = lmf_addr->rsi;
-#endif
- }
- else {
- offset = omit_fp ? 0 : -1;
- /* restore caller saved registers */
- for (i = 0; i < AMD64_NREG; i ++)
- if (AMD64_IS_CALLEE_SAVED_REG (i) && (ji->used_regs & (1 << i))) {
- guint64 reg;
-
- if (omit_fp) {
- reg = *((guint64*)ctx->rsp + offset);
- offset ++;
- }
- else {
- reg = *((guint64 *)ctx->rbp + offset);
- offset --;
- }
-
- switch (i) {
- case AMD64_RBX:
- new_ctx->rbx = reg;
- break;
- case AMD64_R12:
- new_ctx->r12 = reg;
- break;
- case AMD64_R13:
- new_ctx->r13 = reg;
- break;
- case AMD64_R14:
- new_ctx->r14 = reg;
- break;
- case AMD64_R15:
- new_ctx->r15 = reg;
- break;
- case AMD64_RBP:
- new_ctx->rbp = reg;
- break;
-#ifdef PLATFORM_WIN32
- case AMD64_RDI:
- new_ctx->rdi = reg;
- break;
- case AMD64_RSI:
- new_ctx->rsi = reg;
- break;
-#endif
- default:
- g_assert_not_reached ();
- }
- }
- }
+ if (ji->from_aot)
+ unwind_info = mono_aot_get_unwind_info (ji, &unwind_info_len);
+ else
+ unwind_info = mono_get_cached_unwind_info (ji->used_regs, &unwind_info_len);
+
+ regs [AMD64_RAX] = new_ctx->rax;
+ regs [AMD64_RBX] = new_ctx->rbx;
+ regs [AMD64_RCX] = new_ctx->rcx;
+ regs [AMD64_RDX] = new_ctx->rdx;
+ regs [AMD64_RBP] = new_ctx->rbp;
+ regs [AMD64_RSP] = new_ctx->rsp;
+ regs [AMD64_RSI] = new_ctx->rsi;
+ regs [AMD64_RDI] = new_ctx->rdi;
+ regs [AMD64_RIP] = new_ctx->rip;
+ regs [AMD64_R12] = new_ctx->r12;
+ regs [AMD64_R13] = new_ctx->r13;
+ regs [AMD64_R14] = new_ctx->r14;
+ regs [AMD64_R15] = new_ctx->r15;
+
+ mono_unwind_frame (unwind_info, unwind_info_len, -8, ji->code_start,
+ (guint8*)ji->code_start + ji->code_size,
+ ip, regs, MONO_MAX_IREGS + 1, &cfa);
+
+ new_ctx->rax = regs [AMD64_RAX];
+ new_ctx->rbx = regs [AMD64_RBX];
+ new_ctx->rcx = regs [AMD64_RCX];
+ new_ctx->rdx = regs [AMD64_RDX];
+ new_ctx->rbp = regs [AMD64_RBP];
+ new_ctx->rsp = regs [AMD64_RSP];
+ new_ctx->rsi = regs [AMD64_RSI];
+ new_ctx->rdi = regs [AMD64_RDI];
+ new_ctx->rip = regs [AMD64_RIP];
+ new_ctx->r12 = regs [AMD64_R12];
+ new_ctx->r13 = regs [AMD64_R13];
+ new_ctx->r14 = regs [AMD64_R14];
+ new_ctx->r15 = regs [AMD64_R15];
+
+ /* The CFA becomes the new SP value */
+ new_ctx->rsp = (gssize)cfa;
+
+ /* Adjust IP */
+ new_ctx->rip --;
if (*lmf && ((*lmf) != jit_tls->first_lmf) && (MONO_CONTEXT_GET_SP (ctx) >= (gpointer)(*lmf)->rsp)) {
/* remove any unused lmf */
*lmf = (gpointer)(((guint64)(*lmf)->previous_lmf) & ~1);
}
- if (omit_fp) {
- /* Pop frame */
- new_ctx->rsp += (ji->used_regs >> 16) & (0x7fff);
- new_ctx->rip = *((guint64 *)new_ctx->rsp) - 1;
- /* Pop return address */
- new_ctx->rsp += 8;
- }
- else {
- /* Pop EBP and the return address */
- new_ctx->rsp = ctx->rbp + (2 * sizeof (gpointer));
- /* we substract 1, so that the IP points into the call instruction */
- new_ctx->rip = *((guint64 *)ctx->rbp + 1) - 1;
- new_ctx->rbp = *((guint64 *)ctx->rbp);
- }
-
/* Pop arguments off the stack */
{
MonoJitArgumentInfo *arg_info = g_newa (MonoJitArgumentInfo, mono_method_signature (ji->method)->param_count + 1);
projects / mono.git / blobdiff