gpointer
mono_arch_get_restore_context (MonoTrampInfo **info, gboolean aot)
{
guint8 *start, *code;
MonoJumpInfo *ji = NULL;
GSList *unwind_ops = NULL;
int i, ctx_reg, size;
guint8 *labels [16];
size = 256;
code = start = mono_global_codeman_reserve (size);
arm_movx (code, ARMREG_IP0, ARMREG_R0);
ctx_reg = ARMREG_IP0;
/* Restore fregs */
arm_ldrx (code, ARMREG_IP1, ctx_reg, MONO_STRUCT_OFFSET (MonoContext, has_fregs));
labels [0] = code;
arm_cbzx (code, ARMREG_IP1, 0);
for (i = 0; i < 32; ++i)
arm_ldrfpx (code, i, ctx_reg, MONO_STRUCT_OFFSET (MonoContext, fregs) + (i * 8));
mono_arm_patch (labels [0], code, MONO_R_ARM64_CBZ);
/* Restore gregs */
// FIXME: Restore less registers
// FIXME: fp should be restored later
code = mono_arm_emit_load_regarray (code, 0xffffffff & ~(1 << ctx_reg) & ~(1 << ARMREG_SP), ctx_reg, MONO_STRUCT_OFFSET (MonoContext, regs));
/* ip0/ip1 doesn't need to be restored */
/* ip1 = pc */
arm_ldrx (code, ARMREG_IP1, ctx_reg, MONO_STRUCT_OFFSET (MonoContext, pc));
/* ip0 = sp */
arm_ldrx (code, ARMREG_IP0, ctx_reg, MONO_STRUCT_OFFSET (MonoContext, regs) + (ARMREG_SP * 8));
/* Restore sp, ctx is no longer valid */
arm_movspx (code, ARMREG_SP, ARMREG_IP0);
/* Branch to pc */
arm_brx (code, ARMREG_IP1);
/* Not reached */
arm_brk (code, 0);
g_assert ((code - start) < size);
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 ("restore_context", start, code - start, ji, unwind_ops);
return start;
}
/*
* mono_arch_get_gsharedvt_arg_trampoline:
*
* See tramp-x86.c for documentation.
*/
gpointer
mono_arch_get_gsharedvt_arg_trampoline (MonoDomain *domain, gpointer arg, gpointer addr)
{
guint8 *code, *buf;
int buf_len = 40;
/*
* Return a trampoline which calls ADDR passing in ARG.
* Pass the argument in ip1, clobbering ip0.
*/
buf = code = mono_global_codeman_reserve (buf_len);
code = mono_arm_emit_imm64 (code, ARMREG_IP1, (guint64)arg);
code = mono_arm_emit_imm64 (code, ARMREG_IP0, (guint64)addr);
arm_brx (code, ARMREG_IP0);
g_assert ((code - buf) < buf_len);
mono_arch_flush_icache (buf, code - buf);
return buf;
}
