#include "debugger-agent.h"
#include "jit-icalls.h"
+#ifdef ENABLE_INTERPRETER
+#include "interp/interp.h"
+#endif
+
#define ALIGN_TO(val,align) ((((guint64)val) + ((align) - 1)) & ~((align) - 1))
void
return buf;
}
+/*
+ * mono_arch_get_enter_icall_trampoline:
+ *
+ * See tramp-amd64.c for documentation.
+ */
+gpointer
+mono_arch_get_enter_icall_trampoline (MonoTrampInfo **info)
+{
+#ifdef ENABLE_INTERPRETER
+ const int gregs_num = INTERP_ICALL_TRAMP_IARGS;
+ const int fregs_num = INTERP_ICALL_TRAMP_FARGS;
+
+ guint8 *start = NULL, *code, *label_gexits [gregs_num], *label_fexits [fregs_num], *label_leave_tramp [3], *label_is_float_ret;
+ MonoJumpInfo *ji = NULL;
+ GSList *unwind_ops = NULL;
+ int buf_len, i, framesize = 0, off_methodargs, off_targetaddr;
+ const int fp_reg = ARMREG_R7;
+
+ buf_len = 512 + 1024;
+ start = code = (guint8 *) mono_global_codeman_reserve (buf_len);
+
+ off_methodargs = framesize;
+ framesize += sizeof (mgreg_t);
+
+ off_targetaddr = framesize;
+ framesize += sizeof (mgreg_t);
+
+ framesize = ALIGN_TO (framesize, MONO_ARCH_FRAME_ALIGNMENT);
+
+ /* allocate space on stack for argument passing */
+ const int stack_space = ALIGN_TO (((gregs_num - ARMREG_R3) * sizeof (mgreg_t)), MONO_ARCH_FRAME_ALIGNMENT);
+
+ /* use r4, r5 and r6 as scratch registers */
+ ARM_PUSH (code, (1 << fp_reg) | (1 << ARMREG_LR) | (1 << ARMREG_R4) | (1 << ARMREG_R5) | (1 << ARMREG_R6));
+ ARM_MOV_REG_REG (code, fp_reg, ARMREG_SP);
+ ARM_SUB_REG_IMM8 (code, ARMREG_SP, ARMREG_SP, stack_space + framesize);
+
+ /* save InterpMethodArguments* onto stack */
+ ARM_STR_IMM (code, ARMREG_R1, fp_reg, off_methodargs);
+
+ /* save target address onto stack */
+ ARM_STR_IMM (code, ARMREG_R0, fp_reg, off_targetaddr);
+
+ /* load pointer to InterpMethodArguments* into r4 */
+ ARM_MOV_REG_REG (code, ARMREG_R4, ARMREG_R1);
+
+ /* move flen into r5 */
+ ARM_LDR_IMM (code, ARMREG_R5, ARMREG_R4, MONO_STRUCT_OFFSET (InterpMethodArguments, flen));
+ /* load pointer to fargs into r6 */
+ ARM_LDR_IMM (code, ARMREG_R6, ARMREG_R4, MONO_STRUCT_OFFSET (InterpMethodArguments, fargs));
+
+ for (i = 0; i < fregs_num; ++i) {
+ ARM_CMP_REG_IMM (code, ARMREG_R5, 0, 0);
+ label_fexits [i] = code;
+ ARM_B_COND (code, ARMCOND_EQ, 0);
+
+ g_assert (i <= ARM_VFP_D7); /* otherwise, need to pass args on stack */
+ ARM_FLDD (code, i, ARMREG_R6, i * sizeof (double));
+ ARM_SUB_REG_IMM8 (code, ARMREG_R5, ARMREG_R5, 1);
+ }
+
+ for (i = 0; i < fregs_num; i++)
+ arm_patch (label_fexits [i], code);
+
+ /* move ilen into r5 */
+ ARM_LDR_IMM (code, ARMREG_R5, ARMREG_R4, MONO_STRUCT_OFFSET (InterpMethodArguments, ilen));
+ /* load pointer to iargs into r6 */
+ ARM_LDR_IMM (code, ARMREG_R6, ARMREG_R4, MONO_STRUCT_OFFSET (InterpMethodArguments, iargs));
+
+ int stack_offset = 0;
+ for (i = 0; i < gregs_num; i++) {
+ ARM_CMP_REG_IMM (code, ARMREG_R5, 0, 0);
+ label_gexits [i] = code;
+ ARM_B_COND (code, ARMCOND_EQ, 0);
+
+ if (i <= ARMREG_R3) {
+ ARM_LDR_IMM (code, i, ARMREG_R6, i * sizeof (mgreg_t));
+ } else {
+ ARM_LDR_IMM (code, ARMREG_R4, ARMREG_R6, i * sizeof (mgreg_t));
+ ARM_STR_IMM (code, ARMREG_R4, ARMREG_SP, stack_offset);
+ stack_offset += sizeof (mgreg_t);
+ }
+ ARM_SUB_REG_IMM8 (code, ARMREG_R5, ARMREG_R5, 1);
+ }
+
+ for (i = 0; i < gregs_num; i++)
+ arm_patch (label_gexits [i], code);
+
+ /* load target addr */
+ ARM_LDR_IMM (code, ARMREG_R4, fp_reg, off_targetaddr);
+
+ /* call into native function */
+ ARM_BLX_REG (code, ARMREG_R4);
+
+ /* load InterpMethodArguments */
+ ARM_LDR_IMM (code, ARMREG_R4, fp_reg, off_methodargs);
+
+ /* load is_float_ret */
+ ARM_LDR_IMM (code, ARMREG_R5, ARMREG_R4, MONO_STRUCT_OFFSET (InterpMethodArguments, is_float_ret));
+
+ /* check if a float return value is expected */
+ ARM_CMP_REG_IMM (code, ARMREG_R5, 0, 0);
+ label_is_float_ret = code;
+ ARM_B_COND (code, ARMCOND_NE, 0);
+
+ /* greg return */
+ /* load retval */
+ ARM_LDR_IMM (code, ARMREG_R5, ARMREG_R4, MONO_STRUCT_OFFSET (InterpMethodArguments, retval));
+
+ ARM_CMP_REG_IMM (code, ARMREG_R5, 0, 0);
+ label_leave_tramp [0] = code;
+ ARM_B_COND (code, ARMCOND_EQ, 0);
+
+ /* store greg result, always write back 64bit */
+ ARM_STR_IMM (code, ARMREG_R0, ARMREG_R5, 0);
+ ARM_STR_IMM (code, ARMREG_R1, ARMREG_R5, 4);
+
+ label_leave_tramp [1] = code;
+ ARM_B_COND (code, ARMCOND_AL, 0);
+
+ /* freg return */
+ arm_patch (label_is_float_ret, code);
+ /* load retval */
+ ARM_LDR_IMM (code, ARMREG_R5, ARMREG_R4, MONO_STRUCT_OFFSET (InterpMethodArguments, retval));
+
+ ARM_CMP_REG_IMM (code, ARMREG_R5, 0, 0);
+ label_leave_tramp [2] = code;
+ ARM_B_COND (code, ARMCOND_EQ, 0);
+
+ /* store freg result */
+ ARM_FSTD (code, ARM_VFP_F0, ARMREG_R5, 0);
+
+ for (i = 0; i < 3; i++)
+ arm_patch (label_leave_tramp [i], code);
+
+ ARM_MOV_REG_REG (code, ARMREG_SP, fp_reg);
+ ARM_POP (code, (1 << fp_reg) | (1 << ARMREG_PC) | (1 << ARMREG_R4) | (1 << ARMREG_R5) | (1 << ARMREG_R6));
+
+ g_assert (code - start < buf_len);
+
+ mono_arch_flush_icache (start, code - start);
+ mono_profiler_code_buffer_new (start, code - start, MONO_PROFILER_CODE_BUFFER_EXCEPTION_HANDLING, NULL);
+
+ if (info)
+ *info = mono_tramp_info_create ("enter_icall_trampoline", start, code - start, ji, unwind_ops);
+
+ return start;
+#else
+ g_assert_not_reached ();
+ return NULL;
+#endif /* ENABLE_INTERPRETER */
+}
+
#else
guchar*
projects / mono.git / blobdiff