Commit cb1977d3 authored by Richard Henderson's avatar Richard Henderson Committed by Blue Swirl
Browse files

tcg-sparc: Add debug_frame support. 



Signed-off-by: default avatarRichard Henderson <rth@twiddle.net>
Signed-off-by: default avatarBlue Swirl <blauwirbel@gmail.com>
parent e7bd6300

elf.h

+15 −0
Original line number Diff line number Diff line
@@ -346,6 +346,21 @@ typedef struct { 
#define R_MIPS_HIVENDOR		127





/* SUN SPARC specific definitions.  */



/* Values for Elf64_Ehdr.e_flags.  */



#define EF_SPARCV9_MM           3

#define EF_SPARCV9_TSO          0

#define EF_SPARCV9_PSO          1

#define EF_SPARCV9_RMO          2

#define EF_SPARC_LEDATA         0x800000 /* little endian data */

#define EF_SPARC_EXT_MASK       0xFFFF00

#define EF_SPARC_32PLUS         0x000100 /* generic V8+ features */

#define EF_SPARC_SUN_US1        0x000200 /* Sun UltraSPARC1 extensions */

#define EF_SPARC_HAL_R1         0x000400 /* HAL R1 extensions */

#define EF_SPARC_SUN_US3        0x000800 /* Sun UltraSPARCIII extensions */



/*

 * Sparc ELF relocation types

 */

tcg/sparc/tcg-target.c

+63 −0
Original line number Diff line number Diff line
@@ -1624,3 +1624,66 @@ static void tcg_target_init(TCGContext *s) 
    tcg_regset_set_reg(s->reserved_regs, TCG_REG_O7);

    tcg_add_target_add_op_defs(sparc_op_defs);

}



#if TCG_TARGET_REG_BITS == 64

# define ELF_HOST_MACHINE  EM_SPARCV9

#elif defined(__sparc_v8plus__)

# define ELF_HOST_MACHINE  EM_SPARC32PLUS

# define ELF_HOST_FLAGS    EF_SPARC_32PLUS

#else

# define ELF_HOST_MACHINE  EM_SPARC

#endif



typedef struct {

    uint32_t len __attribute__((aligned((sizeof(void *)))));

    uint32_t id;

    uint8_t version;

    char augmentation[1];

    uint8_t code_align;

    uint8_t data_align;

    uint8_t return_column;

} DebugFrameCIE;



typedef struct {

    uint32_t len __attribute__((aligned((sizeof(void *)))));

    uint32_t cie_offset;

    tcg_target_long func_start __attribute__((packed));

    tcg_target_long func_len __attribute__((packed));

    uint8_t def_cfa[TCG_TARGET_REG_BITS == 64 ? 4 : 2];

    uint8_t win_save;

    uint8_t ret_save[3];

} DebugFrameFDE;



typedef struct {

    DebugFrameCIE cie;

    DebugFrameFDE fde;

} DebugFrame;



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 = -sizeof(void *) & 0x7f,

    .cie.return_column = 15,            /* o7 */



    .fde.len = sizeof(DebugFrameFDE)-4, /* length after .len member */

    .fde.def_cfa = {

#if TCG_TARGET_REG_BITS == 64

        12, 30,                         /* DW_CFA_def_cfa i6, 2047 */

        (2047 & 0x7f) | 0x80, (2047 >> 7)

#else

        13, 30                          /* DW_CFA_def_cfa_register i6 */

#endif

    },

    .fde.win_save = 0x2d,               /* DW_CFA_GNU_window_save */

    .fde.ret_save = { 9, 15, 31 },      /* DW_CFA_register o7, i7 */

};



void tcg_register_jit(void *buf, size_t buf_size)

{

    debug_frame.fde.func_start = (tcg_target_long) buf;

    debug_frame.fde.func_len = buf_size;



    tcg_register_jit_int(buf, buf_size, &debug_frame, sizeof(debug_frame));

}