diff options
Diffstat (limited to 'thirdparty/pcre2/src/sljit/sljitNativeX86_64.c')
| -rw-r--r-- | thirdparty/pcre2/src/sljit/sljitNativeX86_64.c | 54 |
1 files changed, 53 insertions, 1 deletions
diff --git a/thirdparty/pcre2/src/sljit/sljitNativeX86_64.c b/thirdparty/pcre2/src/sljit/sljitNativeX86_64.c index 8506565614..5758711954 100644 --- a/thirdparty/pcre2/src/sljit/sljitNativeX86_64.c +++ b/thirdparty/pcre2/src/sljit/sljitNativeX86_64.c @@ -39,8 +39,10 @@ static sljit_s32 emit_load_imm64(struct sljit_compiler *compiler, sljit_s32 reg, return SLJIT_SUCCESS; } -static sljit_u8* generate_far_jump_code(struct sljit_jump *jump, sljit_u8 *code_ptr, sljit_s32 type) +static sljit_u8* generate_far_jump_code(struct sljit_jump *jump, sljit_u8 *code_ptr) { + sljit_s32 type = jump->flags >> TYPE_SHIFT; + int short_addr = !(jump->flags & SLJIT_REWRITABLE_JUMP) && !(jump->flags & JUMP_LABEL) && (jump->u.target <= 0xffffffff); /* The relative jump below specialized for this case. */ @@ -72,6 +74,56 @@ static sljit_u8* generate_far_jump_code(struct sljit_jump *jump, sljit_u8 *code_ return code_ptr; } +static sljit_u8* generate_put_label_code(struct sljit_put_label *put_label, sljit_u8 *code_ptr, sljit_uw max_label) +{ + if (max_label > HALFWORD_MAX) { + put_label->addr -= put_label->flags; + put_label->flags = PATCH_MD; + return code_ptr; + } + + if (put_label->flags == 0) { + /* Destination is register. */ + code_ptr = (sljit_u8*)put_label->addr - 2 - sizeof(sljit_uw); + + SLJIT_ASSERT((code_ptr[0] & 0xf8) == REX_W); + SLJIT_ASSERT((code_ptr[1] & 0xf8) == MOV_r_i32); + + if ((code_ptr[0] & 0x07) != 0) { + code_ptr[0] = (sljit_u8)(code_ptr[0] & ~0x08); + code_ptr += 2 + sizeof(sljit_s32); + } + else { + code_ptr[0] = code_ptr[1]; + code_ptr += 1 + sizeof(sljit_s32); + } + + put_label->addr = (sljit_uw)code_ptr; + return code_ptr; + } + + code_ptr -= put_label->flags + (2 + sizeof(sljit_uw)); + SLJIT_MEMMOVE(code_ptr, code_ptr + (2 + sizeof(sljit_uw)), put_label->flags); + + SLJIT_ASSERT((code_ptr[0] & 0xf8) == REX_W); + + if ((code_ptr[1] & 0xf8) == MOV_r_i32) { + code_ptr += 2 + sizeof(sljit_uw); + SLJIT_ASSERT((code_ptr[0] & 0xf8) == REX_W); + } + + SLJIT_ASSERT(code_ptr[1] == MOV_rm_r); + + code_ptr[0] = (sljit_u8)(code_ptr[0] & ~0x4); + code_ptr[1] = MOV_rm_i32; + code_ptr[2] = (sljit_u8)(code_ptr[2] & ~(0x7 << 3)); + + code_ptr = (sljit_u8*)(put_label->addr - (2 + sizeof(sljit_uw)) + sizeof(sljit_s32)); + put_label->addr = (sljit_uw)code_ptr; + put_label->flags = 0; + return code_ptr; +} + SLJIT_API_FUNC_ATTRIBUTE sljit_s32 sljit_emit_enter(struct sljit_compiler *compiler, sljit_s32 options, sljit_s32 arg_types, sljit_s32 scratches, sljit_s32 saveds, sljit_s32 fscratches, sljit_s32 fsaveds, sljit_s32 local_size) |