From f167dc37daebd62c7f4e97c86b1e7ff56a683750 Mon Sep 17 00:00:00 2001 From: Richard Henderson Date: Sun, 23 Mar 2014 21:04:40 -0400 Subject: [PATCH] tcg-s390: Implement tcg_register_jit Signed-off-by: Richard Henderson --- tcg/s390/tcg-target.c | 62 +++++++++++++++++++++++++++++++++++++++++++++------ 1 file changed, 55 insertions(+), 7 deletions(-) diff --git a/tcg/s390/tcg-target.c b/tcg/s390/tcg-target.c index cd60c0162d..2f0cdf8bed 100644 --- a/tcg/s390/tcg-target.c +++ b/tcg/s390/tcg-target.c @@ -2181,18 +2181,17 @@ static void tcg_target_init(TCGContext *s) tcg_add_target_add_op_defs(s390_op_defs); } +#define FRAME_SIZE ((int)(TCG_TARGET_CALL_STACK_OFFSET \ + + TCG_STATIC_CALL_ARGS_SIZE \ + + CPU_TEMP_BUF_NLONGS * sizeof(long))) + static void tcg_target_qemu_prologue(TCGContext *s) { - tcg_target_long frame_size; - /* stmg %r6,%r15,48(%r15) (save registers) */ tcg_out_insn(s, RXY, STMG, TCG_REG_R6, TCG_REG_R15, TCG_REG_R15, 48); /* aghi %r15,-frame_size */ - frame_size = TCG_TARGET_CALL_STACK_OFFSET; - frame_size += TCG_STATIC_CALL_ARGS_SIZE; - frame_size += CPU_TEMP_BUF_NLONGS * sizeof(long); - tcg_out_insn(s, RI, AGHI, TCG_REG_R15, -frame_size); + tcg_out_insn(s, RI, AGHI, TCG_REG_R15, -FRAME_SIZE); tcg_set_frame(s, TCG_REG_CALL_STACK, TCG_STATIC_CALL_ARGS_SIZE + TCG_TARGET_CALL_STACK_OFFSET, @@ -2211,8 +2210,57 @@ static void tcg_target_qemu_prologue(TCGContext *s) /* lmg %r6,%r15,fs+48(%r15) (restore registers) */ tcg_out_insn(s, RXY, LMG, TCG_REG_R6, TCG_REG_R15, TCG_REG_R15, - frame_size + 48); + FRAME_SIZE + 48); /* br %r14 (return) */ tcg_out_insn(s, RR, BCR, S390_CC_ALWAYS, TCG_REG_R14); } + +typedef struct { + DebugFrameCIE cie; + DebugFrameFDEHeader fde; + uint8_t fde_def_cfa[4]; + uint8_t fde_reg_ofs[18]; +} DebugFrame; + +/* We're expecting a 2 byte uleb128 encoded value. */ +QEMU_BUILD_BUG_ON(FRAME_SIZE >= (1 << 14)); + +#define ELF_HOST_MACHINE EM_S390 + +static DebugFrame debug_frame = { + .cie.len = sizeof(DebugFrameCIE)-4, /* length after .len member */ + .cie.id = -1, + .cie.version = 1, + .cie.code_align = 1, + .cie.data_align = 8, /* sleb128 8 */ + .cie.return_column = TCG_REG_R14, + + /* Total FDE size does not include the "len" member. */ + .fde.len = sizeof(DebugFrame) - offsetof(DebugFrame, fde.cie_offset), + + .fde_def_cfa = { + 12, TCG_REG_CALL_STACK, /* DW_CFA_def_cfa %r15, ... */ + (FRAME_SIZE & 0x7f) | 0x80, /* ... uleb128 FRAME_SIZE */ + (FRAME_SIZE >> 7) + }, + .fde_reg_ofs = { + 0x86, 6, /* DW_CFA_offset, %r6, 48 */ + 0x87, 7, /* DW_CFA_offset, %r7, 56 */ + 0x88, 8, /* DW_CFA_offset, %r8, 64 */ + 0x89, 9, /* DW_CFA_offset, %r92, 72 */ + 0x8a, 10, /* DW_CFA_offset, %r10, 80 */ + 0x8b, 11, /* DW_CFA_offset, %r11, 88 */ + 0x8c, 12, /* DW_CFA_offset, %r12, 96 */ + 0x8d, 13, /* DW_CFA_offset, %r13, 104 */ + 0x8e, 14, /* DW_CFA_offset, %r14, 112 */ + } +}; + +void tcg_register_jit(void *buf, size_t buf_size) +{ + debug_frame.fde.func_start = (uintptr_t)buf; + debug_frame.fde.func_len = buf_size; + + tcg_register_jit_int(buf, buf_size, &debug_frame, sizeof(debug_frame)); +} -- 2.11.4.GIT