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tcg-mips: Add tcg unwind info 

Tested-by: Aurelien Jarno <aurelien@aurel32.net>
Tested-by: James Hogan <james.hogan@imgtec.com>
Tested-by: YunQiang Su <wzssyqa@gmail.com>
Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Jin Guojie <jinguojie@loongson.cn>
Message-Id: <1483592275-4496-9-git-send-email-jinguojie@loongson.cn>
This commit is contained in:
Jin Guojie 2017-01-05 12:57:53 +08:00 committed by Richard Henderson
parent 0973b1cff8
commit 98d690761a
1 changed files with 44 additions and 0 deletions
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44
tcg/mips/tcg-target.inc.c
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@ -2465,3 +2465,47 @@ void tb_set_jmp_target1(uintptr_t jmp_addr, uintptr_t addr)
atomic_set((uint32_t *)jmp_addr, deposit32(OPC_J, 0, 26, addr >> 2));
flush_icache_range(jmp_addr, jmp_addr + 4);
}
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_MIPS
/* GDB doesn't appear to require proper setting of ELF_HOST_FLAGS,
which is good because they're really quite complicated for MIPS. */
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 + 16, 9, /* DW_CFA_offset, s0, -72 */
0x80 + 17, 8, /* DW_CFA_offset, s2, -64 */
0x80 + 18, 7, /* DW_CFA_offset, s3, -56 */
0x80 + 19, 6, /* DW_CFA_offset, s4, -48 */
0x80 + 20, 5, /* DW_CFA_offset, s5, -40 */
0x80 + 21, 4, /* DW_CFA_offset, s6, -32 */
0x80 + 22, 3, /* DW_CFA_offset, s7, -24 */
0x80 + 30, 2, /* DW_CFA_offset, s8, -16 */
0x80 + 31, 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));
}