diff mbox series

[RFC,v1,07/23] riscv: tcg-target: Regiser the JIT

Message ID bc29bf08db9e3801a3e833f579d93ee2c86cc49d.1542321076.git.alistair.francis@wdc.com (mailing list archive)
State New, archived
Headers show
Series Add RISC-V TCG backend support | expand

Commit Message

Alistair Francis Nov. 15, 2018, 10:34 p.m. UTC 
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Signed-off-by: Michael Clark <mjc@sifive.com>
---
 tcg/riscv/tcg-target.inc.c | 45 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 45 insertions(+)

Comments

Richard Henderson Nov. 16, 2018, 7:59 a.m. UTC | #1 
On 11/15/18 11:34 PM, Alistair Francis wrote:
> Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
> Signed-off-by: Michael Clark <mjc@sifive.com>
> ---
>  tcg/riscv/tcg-target.inc.c | 45 ++++++++++++++++++++++++++++++++++++++
>  1 file changed, 45 insertions(+)

I think this whole patch should be merged with the prologue.  They are
interrelated and it's hard to verify this without the other.

Also, FRAME_SIZE isn't defined yet, so this patch isn't even self-contained.


r~
diff mbox series

Patch

diff --git a/tcg/riscv/tcg-target.inc.c b/tcg/riscv/tcg-target.inc.c
index e5eca4bbbe..a9c57493a0 100644
--- a/tcg/riscv/tcg-target.inc.c
+++ b/tcg/riscv/tcg-target.inc.c
@@ -118,3 +118,48 @@  static const int tcg_target_call_oarg_regs[] = {
 #define TCG_CT_CONST_ZERO  0x100
 #define TCG_CT_CONST_S12   0x200
 #define TCG_CT_CONST_N12   0x400
+
+typedef struct {
+    DebugFrameHeader h;
+    uint8_t fde_def_cfa[4];
+    uint8_t fde_reg_ofs[ARRAY_SIZE(tcg_target_callee_save_regs) * 2];
+} DebugFrame;
+
+#define ELF_HOST_MACHINE EM_RISCV
+
+static const DebugFrame debug_frame = {
+    .h.cie.len = sizeof(DebugFrameCIE) - 4, /* length after .len member */
+    .h.cie.id = -1,
+    .h.cie.version = 1,
+    .h.cie.code_align = 1,
+    .h.cie.data_align = -(TCG_TARGET_REG_BITS / 8) & 0x7f, /* sleb128 */
+    .h.cie.return_column = TCG_REG_RA,
+
+    /* Total FDE size does not include the "len" member.  */
+    .h.fde.len = sizeof(DebugFrame) - offsetof(DebugFrame, h.fde.cie_offset),
+
+    .fde_def_cfa = {
+        12, TCG_REG_SP,                 /* DW_CFA_def_cfa sp, ... */
+        (FRAME_SIZE & 0x7f) | 0x80,     /* ... uleb128 FRAME_SIZE */
+        (FRAME_SIZE >> 7)
+    },
+    .fde_reg_ofs = {
+        0x80 + 9,  12,                  /* DW_CFA_offset, s1,  -96 */
+        0x80 + 18, 11,                  /* DW_CFA_offset, s2,  -88 */
+        0x80 + 19, 10,                  /* DW_CFA_offset, s3,  -80 */
+        0x80 + 20, 9,                   /* DW_CFA_offset, s4,  -72 */
+        0x80 + 21, 8,                   /* DW_CFA_offset, s5,  -64 */
+        0x80 + 22, 7,                   /* DW_CFA_offset, s6,  -56 */
+        0x80 + 23, 6,                   /* DW_CFA_offset, s7,  -48 */
+        0x80 + 24, 5,                   /* DW_CFA_offset, s8,  -40 */
+        0x80 + 25, 4,                   /* DW_CFA_offset, s9,  -32 */
+        0x80 + 26, 3,                   /* DW_CFA_offset, s10, -24 */
+        0x80 + 27, 2,                   /* DW_CFA_offset, s11, -16 */
+        0x80 + 1 , 1,                   /* DW_CFA_offset, ra,  -8 */
+    }
+};
+
+void tcg_register_jit(void *buf, size_t buf_size)
+{
+    tcg_register_jit_int(buf, buf_size, &debug_frame, sizeof(debug_frame));
+}