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This commit is contained in:
Freya Murphy 2024-09-13 11:11:18 -04:00
parent baa67735ad
commit df4a225ccf
Signed by: freya
GPG key ID: 744AB800E383AE52
7 changed files with 541 additions and 253 deletions
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267
include/mips.h
View file

@ -42,14 +42,6 @@ enum mips_register {
MIPS_REG_RA = 31,
};
/* mips instruction format */
enum mips_instruction_format {
MIPS_FORMAT_R,
MIPS_FORMAT_I,
MIPS_FORMAT_J,
MIPS_FORMAT_B,
};
/* mips instructions */
enum mips_instruction_type {
MIPS_INS_ADD,
@ -77,10 +69,10 @@ enum mips_instruction_type {
MIPS_INS_BLTZL,
MIPS_INS_BNE,
MIPS_INS_BNEL,
MIPS_INS_DDIV,
MIPS_INS_DDIVU,
MIPS_INS_DIV,
MIPS_INS_MOD,
MIPS_INS_DIVU,
MIPS_INS_MODU,
MIPS_INS_J,
MIPS_INS_JAL,
MIPS_INS_JALR,
@ -98,8 +90,11 @@ enum mips_instruction_type {
MIPS_INS_MFLO,
MIPS_INS_MTHI,
MIPS_INS_MTLO,
MIPS_INS_MUL,
MIPS_INS_MUH,
MIPS_INS_MULU,
MIPS_INS_MUHU,
MIPS_INS_MULT,
MIPS_INS_MULTU,
MIPS_INS_SB,
MIPS_INS_SH,
MIPS_INS_SW,
@ -127,352 +122,368 @@ enum mips_instruction_type {
__MIPS_INS_LEN,
};
/* mips instruction R TYPE */
struct mips_instruction_r_data {
union mips_instruction_data {
/* raw ins */
uint32_t raw : 32;
/* register type */
struct {
uint32_t funct : 6;
uint32_t shamt : 5;
uint32_t rd : 5;
uint32_t rt : 5;
uint32_t rs : 5;
uint32_t op : 6;
} __attribute__((packed));
/* mips instruction I TYPE */
struct mips_instruction_i_data {
};
/* immediate type */
struct {
uint32_t immd : 16;
uint32_t rt : 5;
uint32_t rs : 5;
uint32_t op : 6;
} __attribute__((packed));
/* mips instruction J TYPE */
struct mips_instruction_j_data {
uint32_t : 16;
};
/* jump type */
struct {
uint32_t target : 26;
uint32_t op : 6;
} __attribute__((packed));
/* mips instruction BRANCH TYPE */
struct mips_instruction_branch_data {
uint32_t : 6;
};
/* branch compact */
struct {
int32_t offs26 : 26;
uint32_t : 6;
};
/* branch */
struct {
int32_t offset : 16;
uint32_t funct : 5;
uint32_t rs : 5;
uint32_t op : 6;
} __attribute__((packed));
union mips_instruction_data {
uint32_t raw;
struct mips_instruction_r_data R;
struct mips_instruction_i_data I;
struct mips_instruction_j_data J;
struct mips_instruction_branch_data B;
uint32_t bfunct : 5;
uint32_t : 11;
};
} __attribute__((packed));
/* mips instruction information */
struct mips_instruction {
// metadata
enum mips_instruction_type type;
enum mips_instruction_format format;
const char *name;
// data
union mips_instruction_data data;
};
#define MIPS_INS(ins, format, ...) \
#define MIPS_INS(ins, ...) \
[MIPS_INS_ ##ins] = { \
MIPS_INS_ ##ins, \
MIPS_FORMAT_ ##format, \
#ins, \
.data = { .format = { __VA_ARGS__ } } \
.data = { __VA_ARGS__ } \
}, \
static const struct mips_instruction mips_instructions[] = {
/* ADD - add */
#define MIPS_OP_SPECIAL 0b000000
#define MIPS_FUNCT_ADD 0b100000
MIPS_INS(ADD, R, .op = MIPS_OP_SPECIAL, .funct = MIPS_FUNCT_ADD)
MIPS_INS(ADD, .op = MIPS_OP_SPECIAL, .funct = MIPS_FUNCT_ADD)
/* ADDI - add immediate */
#define MIPS_OP_ADDI 0b001000
MIPS_INS(ADDI, I, .op = MIPS_OP_ADDI)
MIPS_INS(ADDI, .op = MIPS_OP_ADDI)
/* ADDIU - add immediate unsigned */
#define MIPS_OP_ADDIU 0b001001
MIPS_INS(ADDIU, I, .op = MIPS_OP_ADDIU)
MIPS_INS(ADDIU, .op = MIPS_OP_ADDIU)
/* ADDU - add unsigned */
#define MIPS_FUNCT_ADDU 0b100001
MIPS_INS(ADDU, R, .op = MIPS_OP_SPECIAL, .funct = MIPS_FUNCT_ADDU)
MIPS_INS(ADDU, .op = MIPS_OP_SPECIAL, .funct = MIPS_FUNCT_ADDU)
/* AND - and */
#define MIPS_FUNCT_AND 0b100100
MIPS_INS(AND, R, .op = MIPS_OP_SPECIAL, .funct = MIPS_FUNCT_AND)
MIPS_INS(AND, .op = MIPS_OP_SPECIAL, .funct = MIPS_FUNCT_AND)
/* ANDI - and immediate */
#define MIPS_OP_ANDI 0b001100
MIPS_INS(ANDI, I, .op = MIPS_OP_ANDI)
MIPS_INS(ANDI, .op = MIPS_OP_ANDI)
/* BAL - branch and link */
#define MIPS_OP_REGIMM 0b000001
#define MIPS_FUNCT_BAL 0b10001
MIPS_INS(BAL, B, .op = MIPS_OP_REGIMM, .funct = MIPS_FUNCT_BAL)
MIPS_INS(BAL, .op = MIPS_OP_REGIMM, .funct = MIPS_FUNCT_BAL)
/* BALC - branch and link, compact */
#define MIPS_OP_BALC 0b111010
MIPS_INS(BALC, J, .op = MIPS_OP_BALC)
MIPS_INS(BALC, .op = MIPS_OP_BALC)
/* BC - branch, compact */
#define MIPS_OP_BC 0b110010
MIPS_INS(BC, J, .op = MIPS_OP_BC)
MIPS_INS(BC, .op = MIPS_OP_BC)
/* BEQ - branch on equal */
#define MIPS_OP_BEQ 0b000100
MIPS_INS(BEQ, I, .op = MIPS_OP_BEQ)
MIPS_INS(BEQ, .op = MIPS_OP_BEQ)
/* BEQL - branch on equal likely */
#define MIPS_OP_BEQL 0b010100
MIPS_INS(BEQL, I, .op = MIPS_OP_BEQL)
MIPS_INS(BEQL, .op = MIPS_OP_BEQL)
/* BGEZ - branch on greater than or equal to zero */
#define MIPS_FUNCT_BGEZ 0b00001
MIPS_INS(BGEZ, B, .op = MIPS_OP_REGIMM, .funct = MIPS_FUNCT_BGEZ)
MIPS_INS(BGEZ, .op = MIPS_OP_REGIMM, .bfunct = MIPS_FUNCT_BGEZ)
/* BGEZAL - branch on greater than or equal to zero and link */
#define MIPS_FUNCT_BGEZAL 0b10001
MIPS_INS(BGEZAL, B, .op = MIPS_OP_REGIMM, .funct = MIPS_FUNCT_BGEZAL)
MIPS_INS(BGEZAL, .op = MIPS_OP_REGIMM, .bfunct = MIPS_FUNCT_BGEZAL)
/* BGEZAL - branch on greater than or equal to zero and link likely */
#define MIPS_FUNCT_BGEZALL 0b10011
MIPS_INS(BGEZALL, B, .op = MIPS_OP_REGIMM, .funct = MIPS_FUNCT_BGEZALL)
MIPS_INS(BGEZALL, .op = MIPS_OP_REGIMM, .bfunct = MIPS_FUNCT_BGEZALL)
/* BGEZL - branch on greater than or equal to zero likely */
#define MIPS_FUNCT_BGEZL 0b00011
MIPS_INS(BGEZL, B, .op = MIPS_OP_REGIMM, .funct = MIPS_FUNCT_BGEZL)
MIPS_INS(BGEZL, .op = MIPS_OP_REGIMM, .bfunct = MIPS_FUNCT_BGEZL)
/* BGTZ - branch on greater than zero */
#define MIPS_OP_BGTZ 0b000111
MIPS_INS(BGTZ, I, .op = MIPS_OP_BGTZ)
MIPS_INS(BGTZ, .op = MIPS_OP_BGTZ)
/* BGTZL - branch on greater than zero likely */
#define MIPS_OP_BGTZL 0b010111
MIPS_INS(BGTZL, I, .op = MIPS_OP_BGTZL)
MIPS_INS(BGTZL, .op = MIPS_OP_BGTZL)
/* BLEZ - branch on less than or equal to zero */
#define MIPS_OP_BLEZ 0b000110
MIPS_INS(BLEZ, I, .op = MIPS_OP_BLEZ)
MIPS_INS(BLEZ, .op = MIPS_OP_BLEZ)
/* BLEZL - branch on less than or equal to zero likely */
#define MIPS_OP_BLEZL 0b010110
MIPS_INS(BLEZL, I, .op = MIPS_OP_BLEZL)
MIPS_INS(BLEZL, .op = MIPS_OP_BLEZL)
/* BLTZ - branch on less than zero */
#define MIPS_FUNCT_BLTZ 0b00000
MIPS_INS(BLTZ, B, .op = MIPS_OP_REGIMM, .funct = MIPS_FUNCT_BLTZ)
MIPS_INS(BLTZ, .op = MIPS_OP_REGIMM, .bfunct = MIPS_FUNCT_BLTZ)
/* BLTZAL - branch on less than zero and link */
#define MIPS_FUNCT_BLTZAL 0b10000
MIPS_INS(BLTZAL, B, .op = MIPS_OP_REGIMM, .funct = MIPS_FUNCT_BLTZAL)
MIPS_INS(BLTZAL, .op = MIPS_OP_REGIMM, .bfunct = MIPS_FUNCT_BLTZAL)
/* BLTZALL - branch on less than zero and link likely */
#define MIPS_FUNCT_BLTZALL 0b10010
MIPS_INS(BLTZALL, B, .op = MIPS_OP_REGIMM, .funct = MIPS_FUNCT_BLTZALL)
MIPS_INS(BLTZALL, .op = MIPS_OP_REGIMM, .bfunct = MIPS_FUNCT_BLTZALL)
/* BLTZL - branch on less than zero likely */
#define MIPS_FUNCT_BLTZL 0b00010
MIPS_INS(BLTZL, B, .op = MIPS_OP_REGIMM, .funct = MIPS_FUNCT_BLTZL)
MIPS_INS(BLTZL, .op = MIPS_OP_REGIMM, .bfunct = MIPS_FUNCT_BLTZL)
/* BNE - branch on not equal */
#define MIPS_OP_BNE 0b000101
MIPS_INS(BNE, I, .op = MIPS_OP_BNE)
MIPS_INS(BNE, .op = MIPS_OP_BNE)
/* BNEL - branch on not equal likely */
#define MIPS_OP_BNEL 0b010101
MIPS_INS(BNEL, I, .op = MIPS_OP_BNEL)
/* DDIV - doubleword divide */
#define MIPS_FUNCT_DDIV 0b011110
MIPS_INS(DDIV, R, .op = MIPS_OP_SPECIAL, .funct = MIPS_FUNCT_DDIV)
/* DDIVU - doubleword divide unsigned */
#define MIPS_FUNCT_DDIVU 0b011111
MIPS_INS(DDIVU, R, .op = MIPS_OP_SPECIAL, .funct = MIPS_FUNCT_DDIVU)
MIPS_INS(BNEL, .op = MIPS_OP_BNEL)
/* DIV - divide */
#define MIPS_FUNCT_DIV 0b011010
MIPS_INS(DIV, R, .op = MIPS_OP_SPECIAL, .funct = MIPS_FUNCT_DIV)
#define MIPS_FUNCT_SOP32 0b011010
#define MIPS_SOP32_DIV 0b00010
MIPS_INS(DIV, .op = MIPS_OP_SPECIAL, .shamt = MIPS_SOP32_DIV,
.funct = MIPS_FUNCT_SOP32)
/* MOD - modulo */
#define MIPS_SOP32_MOD 0b00011
MIPS_INS(MOD, .op = MIPS_OP_SPECIAL, .shamt = MIPS_SOP32_MOD,
.funct = MIPS_FUNCT_SOP32)
/* DIVU - divide unsigned */
#define MIPS_FUNCT_DIVU 0b011011
MIPS_INS(DIVU, R, .op = MIPS_OP_SPECIAL, .funct = MIPS_FUNCT_DIVU)
#define MIPS_FUNCT_SOP33 0b011011
#define MIPS_SOP33_DIVU 0b00010
MIPS_INS(DIVU, .op = MIPS_OP_SPECIAL, .shamt = MIPS_SOP33_DIVU,
.funct = MIPS_FUNCT_SOP33)
/* MODU - modulo unsigned */
#define MIPS_SOP33_MODU 0b00011
MIPS_INS(MODU, .op = MIPS_OP_SPECIAL, .shamt = MIPS_SOP33_MODU,
.funct = MIPS_FUNCT_SOP33)
/* J - jump */
#define MIPS_OP_J 0b000010
MIPS_INS(J, J, .op = MIPS_OP_J)
MIPS_INS(J, .op = MIPS_OP_J)
/* JAL - jump and link */
#define MIPS_OP_JAL 0b000011
MIPS_INS(JAL, J, .op = MIPS_OP_JAL)
MIPS_INS(JAL, .op = MIPS_OP_JAL)
/* JALR - jump and link register */
#define MIPS_FUNCT_JALR 0b001001
MIPS_INS(JALR, R, .op = MIPS_OP_SPECIAL, .funct = MIPS_FUNCT_JALR)
MIPS_INS(JALR, .op = MIPS_OP_SPECIAL, .funct = MIPS_FUNCT_JALR)
/* JALX - jump and link exchange */
#define MIPS_OP_JALX 0b011101
MIPS_INS(JALX, J, .op = MIPS_OP_JALX)
MIPS_INS(JALX, .op = MIPS_OP_JALX)
/* JR - jump register */
#define MIPS_FUNCT_JR 0b001000
MIPS_INS(JR, R, .op = MIPS_OP_SPECIAL, .funct = MIPS_FUNCT_JR)
MIPS_INS(JR, .op = MIPS_OP_SPECIAL, .funct = MIPS_FUNCT_JR)
/* LB - load byte */
#define MIPS_OP_LB 0b100000
MIPS_INS(LB, I, .op = MIPS_OP_LB)
MIPS_INS(LB, .op = MIPS_OP_LB)
/* LBU - load byte unsigned */
#define MIPS_OP_LBU 0b100100
MIPS_INS(LBU, I, .op = MIPS_OP_LBU)
MIPS_INS(LBU, .op = MIPS_OP_LBU)
/* LH - load half */
#define MIPS_OP_LH 0b100001
MIPS_INS(LH, I, .op = MIPS_OP_LH)
MIPS_INS(LH, .op = MIPS_OP_LH)
/* LHU - load half unsigned */
#define MIPS_OP_LHU 0b100101
MIPS_INS(LHU, I, .op = MIPS_OP_LHU)
MIPS_INS(LHU, .op = MIPS_OP_LHU)
/* LUI - load upper immediate */
#define MIPS_OP_LUI 0b001111
MIPS_INS(LUI, I, .op = MIPS_OP_LUI)
MIPS_INS(LUI, .op = MIPS_OP_LUI)
/* LW - load word */
#define MIPS_OP_LW 0b100011
MIPS_INS(LW, I, .op = MIPS_OP_LW)
MIPS_INS(LW, .op = MIPS_OP_LW)
/* LWL - load word left */
#define MIPS_OP_LWL 0b100010
MIPS_INS(LWL, I, .op = MIPS_OP_LWL)
MIPS_INS(LWL, .op = MIPS_OP_LWL)
/* LWR - load word right */
#define MIPS_OP_LWR 0b100110
MIPS_INS(LWR, I, .op = MIPS_OP_LWR)
MIPS_INS(LWR, .op = MIPS_OP_LWR)
/* MFHI - move from hi */
#define MIPS_FUNCT_MFHI 0b010000
MIPS_INS(MFHI, R, .op = MIPS_OP_SPECIAL, .funct = MIPS_FUNCT_MFHI)
MIPS_INS(MFHI, .op = MIPS_OP_SPECIAL, .funct = MIPS_FUNCT_MFHI)
/* MFLO - move from hi */
#define MIPS_FUNCT_MFLO 0b010010
MIPS_INS(MFLO, R, .op = MIPS_OP_SPECIAL, .funct = MIPS_FUNCT_MFLO)
MIPS_INS(MFLO, .op = MIPS_OP_SPECIAL, .funct = MIPS_FUNCT_MFLO)
/* MTHI - move from hi */
#define MIPS_FUNCT_MTHI 0b010001
MIPS_INS(MTHI, R, .op = MIPS_OP_SPECIAL, .funct = MIPS_FUNCT_MTHI)
MIPS_INS(MTHI, .op = MIPS_OP_SPECIAL, .funct = MIPS_FUNCT_MTHI)
/* MTLO - move from hi */
#define MIPS_FUNCT_MTLO 0b010011
MIPS_INS(MTLO, R, .op = MIPS_OP_SPECIAL, .funct = MIPS_FUNCT_MTLO)
MIPS_INS(MTLO, .op = MIPS_OP_SPECIAL, .funct = MIPS_FUNCT_MTLO)
/* MULT - multiply */
/* MUL - multiply low word */
#define MIPS_FUNCT_SOP30 0b011000
#define MIPS_SOP30_MUL 0b00010
MIPS_INS(MUL, .op = MIPS_OP_SPECIAL, .shamt = MIPS_SOP30_MUL,
.funct = MIPS_FUNCT_SOP30)
/* MUH - multiply high word */
#define MIPS_SOP30_MUH 0b00011
MIPS_INS(MUH, .op = MIPS_OP_SPECIAL, .shamt = MIPS_SOP30_MUH,
.funct = MIPS_FUNCT_SOP30)
/* MULU - multiply low word unsigned */
#define MIPS_FUNCT_SOP31 0b011001
#define MIPS_SOP31_MULU 0b00010
MIPS_INS(MULU, .op = MIPS_OP_SPECIAL, .shamt = MIPS_SOP31_MULU,
.funct = MIPS_FUNCT_SOP31)
/* MUHU - multiply high word unsgined */
#define MIPS_SOP31_MUHU 0b00011
MIPS_INS(MUHU, .op = MIPS_OP_SPECIAL, .shamt = MIPS_SOP31_MUHU,
.funct = MIPS_FUNCT_SOP31)
/* MULT - multiply (OLD) */
#define MIPS_FUNCT_MULT 0b011000
MIPS_INS(MULT, R, .op = MIPS_OP_SPECIAL, .funct = MIPS_FUNCT_MULT)
/* MULTU - multiply unsigned */
#define MIPS_FUNCT_MULTU 0b011001
MIPS_INS(MULTU, R, .op = MIPS_OP_SPECIAL, .funct = MIPS_FUNCT_MULTU)
MIPS_INS(MULT, .op = MIPS_OP_SPECIAL, .funct = MIPS_FUNCT_MULT)
/* SB - store byte */
#define MIPS_OP_SB 0b101000
MIPS_INS(SB, I, .op = MIPS_OP_SB)
MIPS_INS(SB, .op = MIPS_OP_SB)
/* SH - store half */
#define MIPS_OP_SH 0b101001
MIPS_INS(SH, I, .op = MIPS_OP_SH)
MIPS_INS(SH, .op = MIPS_OP_SH)
/* SW - store word */
#define MIPS_OP_SW 0b101011
MIPS_INS(SW, I, .op = MIPS_OP_SW)
MIPS_INS(SW, .op = MIPS_OP_SW)
/* SWL - store word left */
#define MIPS_OP_SWL 0b101010
MIPS_INS(SWL, I, .op = MIPS_OP_SWL)
MIPS_INS(SWL, .op = MIPS_OP_SWL)
/* SWR - store word right */
#define MIPS_OP_SWR 0b101110
MIPS_INS(SWR, I, .op = MIPS_OP_SWR)
MIPS_INS(SWR, .op = MIPS_OP_SWR)
/* SLL - shift left logical */
#define MIPS_FUNCT_SLL 0b000000
MIPS_INS(SLL, R, .op = MIPS_OP_SPECIAL, .funct = MIPS_FUNCT_SLL)
MIPS_INS(SLL, .op = MIPS_OP_SPECIAL, .funct = MIPS_FUNCT_SLL)
/* SLLV - shift left logical variable */
#define MIPS_FUNCT_SLLV 0b000100
MIPS_INS(SLLV, R, .op = MIPS_OP_SPECIAL, .funct = MIPS_FUNCT_SLLV)
MIPS_INS(SLLV, .op = MIPS_OP_SPECIAL, .funct = MIPS_FUNCT_SLLV)
/* SLT - set less then */
#define MIPS_FUNCT_SLT 0b101010
MIPS_INS(SLT, R, .op = MIPS_OP_SPECIAL, .funct = MIPS_FUNCT_SLT)
MIPS_INS(SLT, .op = MIPS_OP_SPECIAL, .funct = MIPS_FUNCT_SLT)
/* SLTI - set less then immediate */
#define MIPS_OP_SLTI 0b001010
MIPS_INS(SLTI, I, .op = MIPS_OP_SLTI)
MIPS_INS(SLTI, .op = MIPS_OP_SLTI)
/* SLTIU - set less then imemdiate unsigned */
#define MIPS_OP_SLTIU 0b001011
MIPS_INS(SLTIU, I, .op = MIPS_OP_SLTIU)
MIPS_INS(SLTIU, .op = MIPS_OP_SLTIU)
/* SLTU - set less than unsigned */
#define MIPS_FUNCT_SLTU 0b101011
MIPS_INS(SLTU, R, .op = MIPS_OP_SPECIAL, .funct = MIPS_FUNCT_SLTU)
MIPS_INS(SLTU, .op = MIPS_OP_SPECIAL, .funct = MIPS_FUNCT_SLTU)
/* SRA - shift right arithmetic */
#define MIPS_FUNCT_SRA 0b000011
MIPS_INS(SRA, R, .op = MIPS_OP_SPECIAL, .funct = MIPS_FUNCT_SRA)
MIPS_INS(SRA, .op = MIPS_OP_SPECIAL, .funct = MIPS_FUNCT_SRA)
/* SRAV - shift right arithmetic variable */
#define MIPS_FUNCT_SRAV 0b000111
MIPS_INS(SRAV, R, .op = MIPS_OP_SPECIAL, .funct = MIPS_FUNCT_SRAV)
MIPS_INS(SRAV, .op = MIPS_OP_SPECIAL, .funct = MIPS_FUNCT_SRAV)
/* SRL - shift right logical */
#define MIPS_FUNCT_SRL 0b000010
MIPS_INS(SRL, R, .op = MIPS_OP_SPECIAL, .funct = MIPS_FUNCT_SRL)
MIPS_INS(SRL, .op = MIPS_OP_SPECIAL, .funct = MIPS_FUNCT_SRL)
/* SRLV - shift right logical variable */
#define MIPS_FUNCT_SRLV 0b000110
MIPS_INS(SRLV, R, .op = MIPS_OP_SPECIAL, .funct = MIPS_FUNCT_SRLV)
MIPS_INS(SRLV, .op = MIPS_OP_SPECIAL, .funct = MIPS_FUNCT_SRLV)
/* SUB - subtract */
#define MIPS_FUNCT_SUB 0b100010
MIPS_INS(SUB, R, .op = MIPS_OP_SPECIAL, .funct = MIPS_FUNCT_SUB)
MIPS_INS(SUB, .op = MIPS_OP_SPECIAL, .funct = MIPS_FUNCT_SUB)
/* SUBU - subtract unsigned */
#define MIPS_FUNCT_SUBU 0b100011
MIPS_INS(SUBU, R, .op = MIPS_OP_SPECIAL, .funct = MIPS_FUNCT_SUBU)
MIPS_INS(SUBU, .op = MIPS_OP_SPECIAL, .funct = MIPS_FUNCT_SUBU)
/* SYSCALL - syscall */
#define MIPS_FUNCT_SYSCALL 0b001100
MIPS_INS(SYSCALL, R, .op = MIPS_OP_SPECIAL, .funct = MIPS_FUNCT_SYSCALL)
MIPS_INS(SYSCALL, .op = MIPS_OP_SPECIAL, .funct = MIPS_FUNCT_SYSCALL)
/* OR - or */
#define MIPS_FUNCT_OR 0b100101
MIPS_INS(OR, R, .op = MIPS_OP_SPECIAL, .funct = MIPS_FUNCT_OR)
MIPS_INS(OR, .op = MIPS_OP_SPECIAL, .funct = MIPS_FUNCT_OR)
/* ORI - or imemdiate */
#define MIPS_OP_ORI 0b001101
MIPS_INS(ORI, I, .op = MIPS_OP_ORI)
MIPS_INS(ORI, .op = MIPS_OP_ORI)
/* NOR - not or */
#define MIPS_FUNCT_NOR 0b100111
MIPS_INS(NOR, R, .op = MIPS_OP_SPECIAL, .funct = MIPS_FUNCT_NOR)
MIPS_INS(NOR, .op = MIPS_OP_SPECIAL, .funct = MIPS_FUNCT_NOR)
/* XOR - exclusive or */
#define MIPS_FUNCT_XOR 0b100110
MIPS_INS(XOR, R, .op = MIPS_OP_SPECIAL, .funct = MIPS_FUNCT_XOR)
MIPS_INS(XOR, .op = MIPS_OP_SPECIAL, .funct = MIPS_FUNCT_XOR)
/* XORI - exclusive or immediate */
#define MIPS_OP_XORI 0b001110
MIPS_INS(XORI, I, .op = MIPS_OP_XORI)
MIPS_INS(XORI, .op = MIPS_OP_XORI)
};
#undef MIPS_INS

7
lib/error.c
View file

@ -3,10 +3,14 @@
#include <stdio.h>
char *current_file = "file.asm";
int log_disabled = 1;
__attribute__((format(printf, 4, 5)))
void __log_impl_pos(int line, int column, int type, const char *format, ...)
{
if (log_disabled)
return;
va_list list;
va_start(list, format);
@ -31,6 +35,9 @@ void __log_impl_pos(int line, int column, int type, const char *format, ...)
__attribute__((format(printf, 2, 3)))
void __log_impl(int type, const char *format, ...)
{
if (log_disabled)
return;
va_list list;
va_start(list, format);

26
masm/asm.c
View file

@ -247,24 +247,15 @@ static int handle_ins(struct assembler *assembler,
if (sec_push(sec, entry))
return M_ERROR;
unsigned char type = 0;
switch (ref->type) {
case REF_NONE:
if (ref->type == R_MIPS_NONE)
continue;
case REF_OFFESET:
type = R_MIPS_PC16;
break;
case REF_TARGET:
type = R_MIPS_26;
break;
}
size_t symidx;
if (find_symbol_or_stub(assembler, ref->name, NULL, &symidx))
return M_ERROR;
Elf32_Rela rel = {
.r_info = htonl(ELF32_R_INFO(symidx, type)),
.r_info = htonl(ELF32_R_INFO(symidx, ref->type)),
.r_addend = htonl(ref->addend),
.r_offset = htonl(sec_index(sec, secidx + i)),
};
@ -543,7 +534,7 @@ static void update_offsets(struct assembler *assembler, Elf32_Ehdr *ehdr)
}
// sections
size_t v_addr = 0x00400000;
size_t v_addr = 0;
for (uint32_t i = 0; i < assembler->sectab.len; i++) {
struct section *sec = &assembler->sectab.sections[i];
uint32_t idx = sec->shdr_idx;
@ -631,11 +622,14 @@ static int write_file(struct assembler *assembler, Elf32_Ehdr *ehdr,
for (uint32_t j = 0; j < sec->len; j++) {
struct section_entry *entry = &sec->entries[j];
size_t size = entry->size;
size_t zeros = size % sec->alignment;;
if (entry->type != ENT_NO_DATA)
fwrite(&entry->data, size, 1, out);
while(size % sec->alignment) {
uint8_t zero = 0;
fwrite(&zero, 1, 1, out);
size++;
else
zeros += size;
while(zeros) {
fputc(0, out);
zeros--;
}
}
}

32
masm/lex.c
View file

@ -149,6 +149,14 @@ static int lex_number(struct lexer *lexer, int64_t *n)
{
int64_t number = 0;
int base = 10;
int neg = 0;
// check if negative
if (lex_peek(lexer) == '-') {
lex_next(lexer);
neg = 1;
}
// skip all leading zeros, they dont do anything.
// this also allows us to directly check for 0b, 0o, and 0x
@ -200,6 +208,9 @@ static int lex_number(struct lexer *lexer, int64_t *n)
number += n;
}
if (neg)
number = -number;
*n = number;
return M_SUCCESS;
}
@ -226,7 +237,8 @@ again: // use label to avoid whitespace recursion
case ';':
case '#':
skip_comment(lexer);
goto again;
token->type = TOK_NL;
break;
case ' ':
case '\t':
// skip white space
@ -267,6 +279,7 @@ again: // use label to avoid whitespace recursion
lex_next(lexer);
res = lex_string(lexer, token->text);
break;
case '-':
case '0':
case '1':
case '2':
@ -341,3 +354,20 @@ char *token_str(enum token_type type)
}
return "unknown";
}
void lexer_save(struct lexer *lexer, struct lexer_state *state)
{
state->x = lexer->x;
state->y = lexer->y;
state->peek = lexer->peek;
state->offset = ftell(lexer->file);
}
/* load a different state into a lexer */
void lexer_load(struct lexer *lexer, const struct lexer_state *state)
{
lexer->x = state->x;
lexer->y = state->y;
lexer->peek = state->peek;
fseek(lexer->file, state->offset, SEEK_SET);
}

13
masm/lex.h
View file

@ -14,6 +14,13 @@ struct lexer {
int y;
};
struct lexer_state {
long offset;
int peek;
int x;
int y;
};
enum token_type {
TOK_IDENT,
TOK_REG,
@ -52,4 +59,10 @@ int lexer_next(struct lexer *lexer, struct token *token);
/* token type to string */
char *token_str(enum token_type);
/* save the state of a lexer */
void lexer_save(struct lexer *lexer, struct lexer_state *state);
/* load a different state into a lexer */
void lexer_load(struct lexer *lexer, const struct lexer_state *state);
#endif /* __LEX_H__ */

419
masm/parse.c
View file

@ -1,10 +1,14 @@
#include <mlimits.h>
#include <merror.h>
#include <netinet/in.h>
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include <elf.h>
#include "parse.h"
#include "lex.h"
#include "mips.h"
static int next_token(struct parser *parser, struct token *tok)
{
@ -78,8 +82,6 @@ enum mips_parse_format {
MIPS_PARSE_I,
// jump type: offset
MIPS_PARSE_J,
// jump type: register
MIPS_PARSE_JR,
// offset 16b type: offset
MIPS_PARSE_O16,
// offset 26b type: offset
@ -129,15 +131,15 @@ const enum mips_parse_format mips_parse_formats[] = {
FORMAT(BLTZL, BZ)
FORMAT(BNE, BE)
FORMAT(BNEL, BE)
FORMAT(DDIV, R2)
FORMAT(DDIVU, R2)
FORMAT(DIV, R2)
FORMAT(DIVU, R2)
FORMAT(DIV, R)
FORMAT(MOD, R)
FORMAT(DIVU, R)
FORMAT(MODU, R)
FORMAT(J, J)
FORMAT(JAL, J)
FORMAT(JALR, JR) // TODO: handle rd
FORMAT(JALR, RS) // TODO: handle rd
FORMAT(JALX, J)
FORMAT(JR, JR)
FORMAT(JR, RS)
FORMAT(LB, SL)
FORMAT(LBU, SL)
FORMAT(LH, SL)
@ -150,8 +152,11 @@ const enum mips_parse_format mips_parse_formats[] = {
FORMAT(MFLO, RD)
FORMAT(MTHI, RS)
FORMAT(MTLO, RS)
FORMAT(MUL, R)
FORMAT(MUH, R)
FORMAT(MULU, R)
FORMAT(MUHU, R)
FORMAT(MULT, R2)
FORMAT(MULTU, R2)
FORMAT(SB, SL)
FORMAT(SH, SL)
FORMAT(SW, SL)
@ -178,12 +183,13 @@ const enum mips_parse_format mips_parse_formats[] = {
#undef FORMAT
#define MAX5 32
#define MAX16 65536
#define MAX26 67108864
#define MAX5 (1 << 5)
#define MAX16 (1 << 16)
#define MAX26 (1 << 25)
#define MAX32 (1 << 31)
static int get_reference(struct parser *parser, uint32_t *offset,
struct reference *ref, enum reference_type type)
static int get_reference(struct parser *parser, uint64_t *offset,
struct reference *ref, unsigned char type)
{
struct token token;
@ -191,6 +197,7 @@ static int get_reference(struct parser *parser, uint32_t *offset,
return M_ERROR;
if (token.type == TOK_NUMBER) {
*offset = token.number;
return M_SUCCESS;
}
@ -210,16 +217,64 @@ static int get_reference(struct parser *parser, uint32_t *offset,
return M_SUCCESS;
}
static int get_offset(struct parser *parser, uint32_t *offset,
static int get_offset(struct parser *parser, int32_t *offset,
struct reference *ref)
{
return get_reference(parser, offset, ref, REF_OFFESET);
uint64_t off;
if (get_reference(parser, &off, ref, R_MIPS_PC16))
return M_ERROR;
if (off % 4) {
ERROR_POS((*parser->lexer), "cannot use offset of '%ld', must "
"be divisble by four", off);
return M_ERROR;
}
if (off > MAX16) {
ERROR("offset '%d' cannot be larger than 16 bits", off);
return M_ERROR;
}
*offset = off;
return M_SUCCESS;
}
static int get_offset_26(struct parser *parser, int32_t *offset,
struct reference *ref)
{
uint64_t off;
if (get_reference(parser, &off, ref, R_MIPS_PC26_S2))
return M_ERROR;
if (off % 4) {
ERROR_POS((*parser->lexer), "cannot use offset of '%ld', must "
"be divisble by four", off);
return M_ERROR;
}
if (off > MAX26) {
ERROR("offset '%d' cannot be larger than 26 bits", off);
return M_ERROR;
}
*offset = off;
return M_SUCCESS;
}
static int get_target(struct parser *parser, uint32_t *offset,
struct reference *ref)
{
return get_reference(parser, offset, ref, REF_TARGET);
uint64_t off;
if (get_reference(parser, &off, ref, R_MIPS_26))
return M_ERROR;
if (off > MAX26) {
ERROR("target '%d' cannot be larger than 26 bits", off);
return M_ERROR;
}
*offset = off;
return M_SUCCESS;
}
static int get_instruction(const char *ident, struct mips_instruction *res)
@ -333,7 +388,7 @@ static int parse_register(struct parser *parser, enum mips_register *reg)
// $rp
else if (c0 == 'r') {
if (c1 == 'p') {
if (c1 == 'a') {
*reg = MIPS_REG_RA;
return M_SUCCESS;
}
@ -356,6 +411,77 @@ static int parse_register(struct parser *parser, enum mips_register *reg)
return M_ERROR;
}
static int get_reg_offset(struct parser *parser, struct mips_instruction *ins,
struct reference *ref)
{
struct token token;
enum mips_register reg;
// =============================================
// defaults
ins->data.rs = MIPS_REG_ZERO;
ins->data.immd = 0;
if (peek_token(parser, &token))
return M_ERROR;
if (token.type == TOK_LPAREN)
goto reg;
else
goto off;
// =============================================
off:
uint64_t immd;
if (get_reference(parser, &immd, ref, R_MIPS_16))
return M_ERROR;
ins->data.offset = htons(immd);
if (peek_token(parser, &token))
return M_ERROR;
if (token.type == TOK_LPAREN)
goto reg;
else
goto end;
// =============================================
reg:
if (assert_token(parser, TOK_LPAREN, NULL))
return M_ERROR;
if (parse_register(parser, &reg))
return M_ERROR;
ins->data.rs = reg;
if (assert_token(parser, TOK_RPAREN, NULL))
return M_ERROR;
// =============================================
end:
if (peek_token(parser, &token))
return M_ERROR;
return M_SUCCESS;
}
static int parse_number(struct parser *parser, uint32_t *n, uint32_t max)
{
struct token token;
if (assert_token(parser, TOK_NUMBER, &token))
return M_ERROR;
if (max && token.number > max) {
ERROR_POS(token, "number cannot be larger than '%d'", max);
return M_ERROR;
}
*n = token.number;
return M_SUCCESS;
}
static int parse_instruction_r(struct parser *parser,
struct mips_instruction *ins)
{
@ -364,21 +490,21 @@ static int parse_instruction_r(struct parser *parser,
if (parse_register(parser, &reg))
return M_ERROR;
ins->data.R.rd = reg;
ins->data.rd = reg;
if (assert_token(parser, TOK_COMMA, NULL))
return M_ERROR;
if (parse_register(parser, &reg))
return M_ERROR;
ins->data.R.rs = reg;
ins->data.rs = reg;
if (assert_token(parser, TOK_COMMA, NULL))
return M_ERROR;
if (parse_register(parser, &reg))
return M_ERROR;
ins->data.R.rt = reg;
ins->data.rt = reg;
return M_SUCCESS;
}
@ -391,14 +517,14 @@ static int parse_instruction_r2(struct parser *parser,
if (parse_register(parser, &reg))
return M_ERROR;
ins->data.R.rs = reg;
ins->data.rs = reg;
if (assert_token(parser, TOK_COMMA, NULL))
return M_ERROR;
if (parse_register(parser, &reg))
return M_ERROR;
ins->data.R.rt = reg;
ins->data.rt = reg;
return M_SUCCESS;
}
@ -411,7 +537,7 @@ static int parse_instruction_rs(struct parser *parser,
if (parse_register(parser, &reg))
return M_ERROR;
ins->data.R.rs = reg;
ins->data.rs = reg;
return M_SUCCESS;
}
@ -424,7 +550,7 @@ static int parse_instruction_rd(struct parser *parser,
if (parse_register(parser, &reg))
return M_ERROR;
ins->data.R.rd = reg;
ins->data.rd = reg;
return M_SUCCESS;
}
@ -438,14 +564,14 @@ static int parse_instruction_i(struct parser *parser,
if (parse_register(parser, &reg))
return M_ERROR;
ins->data.I.rt = reg;
ins->data.rt = reg;
if (assert_token(parser, TOK_COMMA, NULL))
return M_ERROR;
if (parse_register(parser, &reg))
return M_ERROR;
ins->data.I.rs = reg;
ins->data.rs = reg;
if (assert_token(parser, TOK_COMMA, NULL))
return M_ERROR;
@ -455,7 +581,7 @@ static int parse_instruction_i(struct parser *parser,
if (token.number >= MAX16)
return M_ERROR;
ins->data.I.immd = token.number;
ins->data.immd = htons(token.number);
return M_SUCCESS;
}
@ -465,17 +591,21 @@ static int parse_instruction_offset(struct parser *parser,
struct mips_instruction *ins,
struct reference *ref)
{
uint32_t n;
if (get_offset(parser, &n, ref) || n > max)
return M_ERROR;
int32_t n;
switch (max) {
case MAX26:
ins->data.J.target = n;
if (get_offset_26(parser, &n, ref))
return M_ERROR;
ins->data.offs26 = htonl(n);
break;
case MAX16:
ins->data.B.offset = n;
if (get_offset(parser, &n, ref))
return M_ERROR;
ins->data.offset = htons(n);
break;
default:
return M_ERROR;
}
return M_SUCCESS;
@ -488,30 +618,34 @@ static int parse_instruction_j(struct parser *parser,
uint32_t n;
if (get_target(parser, &n, ref) || n > MAX26)
return M_ERROR;
ins->data.J.target = n;
return M_SUCCESS;
}
static int parse_instruction_jr(struct parser *parser,
struct mips_instruction *ins,
struct reference *ref)
{
uint32_t n;
if (get_target(parser, &n, ref) || n > MAX26)
return M_ERROR;
ins->data.J.target = n;
ins->data.target = n;
return M_SUCCESS;
}
static int parse_instruction_branch_equal(struct parser *parser,
struct mips_instruction *ins)
struct mips_instruction *ins,
struct reference *ref)
{
enum mips_register reg;
if (parse_register(parser, &reg))
return M_ERROR;
ins->data.R.rs = reg;
ins->data.rs = reg;
if (assert_token(parser, TOK_COMMA, NULL))
return M_ERROR;
if (parse_register(parser, &reg))
return M_ERROR;
ins->data.rt = reg;
if (assert_token(parser, TOK_COMMA, NULL))
return M_ERROR;
int32_t off;
if (get_offset(parser, &off, ref))
return M_ERROR;
ins->data.offset = htons(off);
return M_SUCCESS;
}
@ -521,18 +655,18 @@ static int parse_instruction_branch(struct parser *parser,
struct reference *ref)
{
enum mips_register reg;
uint32_t n;
int32_t n;
if (parse_register(parser, &reg))
return M_ERROR;
ins->data.B.rs = reg;
ins->data.rs = reg;
if (assert_token(parser, TOK_COMMA, NULL))
return M_ERROR;
if (get_offset(parser, &n, ref) || n > MAX16)
if (get_offset(parser, &n, ref))
return M_ERROR;
ins->data.B.offset = n;
ins->data.offset = htons(n);
return M_SUCCESS;
}
@ -542,40 +676,15 @@ static int parse_instruction_sl(struct parser *parser,
struct reference *ref)
{
enum mips_register reg;
uint32_t offset = 0;
struct token token;
if (parse_register(parser, &reg))
return M_ERROR;
ins->data.I.rt = reg;
ins->data.rt = reg;
if (assert_token(parser, TOK_COMMA, NULL))
return M_ERROR;
if (peek_token(parser, &token))
return M_ERROR;
if (token.type != TOK_LPAREN)
if (get_offset(parser, &offset, ref))
return M_ERROR;
ins->data.I.immd = offset;
if (peek_token(parser, &token))
return M_ERROR;
if (token.type == TOK_NL) {
ins->data.I.rs = MIPS_REG_ZERO;
return M_SUCCESS;
}
if (assert_token(parser, TOK_LPAREN, NULL))
return M_ERROR;
if (parse_register(parser, &reg))
return M_ERROR;
ins->data.I.rs = reg;
if (assert_token(parser, TOK_RPAREN, NULL))
if (get_reg_offset(parser, ins, ref))
return M_ERROR;
return M_SUCCESS;
@ -589,14 +698,14 @@ static int parse_instruction_sli(struct parser *parser,
if (parse_register(parser, &reg))
return M_ERROR;
ins->data.I.rt = reg;
ins->data.rt = reg;
if (assert_token(parser, TOK_COMMA, NULL))
return M_ERROR;
if (assert_token(parser, TOK_NUMBER, &token) || token.number > MAX16)
return M_ERROR;
ins->data.I.immd = token.number;
ins->data.immd = htons(token.number);
return M_SUCCESS;
}
@ -609,21 +718,21 @@ static int parse_instruction_s(struct parser *parser,
if (parse_register(parser, &reg))
return M_ERROR;
ins->data.R.rd = reg;
ins->data.rd = reg;
if (assert_token(parser, TOK_COMMA, NULL))
return M_ERROR;
if (parse_register(parser, &reg))
return M_ERROR;
ins->data.R.rt = reg;
ins->data.rt = reg;
if (assert_token(parser, TOK_COMMA, NULL))
return M_ERROR;
if (assert_token(parser, TOK_NUMBER, &token) || token.number > MAX5)
return M_ERROR;
ins->data.R.shamt = token.number;
ins->data.shamt = token.number;
return M_SUCCESS;
}
@ -635,25 +744,151 @@ static int parse_instruction_sv(struct parser *parser,
if (parse_register(parser, &reg))
return M_ERROR;
ins->data.R.rd = reg;
ins->data.rd = reg;
if (assert_token(parser, TOK_COMMA, NULL))
return M_ERROR;
if (parse_register(parser, &reg))
return M_ERROR;
ins->data.R.rt = reg;
ins->data.rt = reg;
if (assert_token(parser, TOK_COMMA, NULL))
return M_ERROR;
if (parse_register(parser, &reg))
return M_ERROR;
ins->data.R.rs = reg;
ins->data.rs = reg;
return M_SUCCESS;
}
static int parse_pseudo_li(struct parser *parser, struct ins_expr *expr)
{
enum mips_register reg;
uint32_t immd;
if (parse_register(parser, &reg))
return M_ERROR;
if (assert_token(parser, TOK_COMMA, NULL))
return M_ERROR;
if (parse_number(parser, &immd, MAX16))
return M_ERROR;
expr->ins_len = 1;
expr->ins[0] = mips_instructions[MIPS_INS_ORI];
expr->ins[0].data.rt = reg;
expr->ins[0].data.rs = MIPS_REG_ZERO;
expr->ins[0].data.immd = htons(immd);
expr->ref[0].type = R_MIPS_NONE;
return M_SUCCESS;
}
static int parse_pseudo_la(struct parser *parser, struct ins_expr *expr)
{
enum mips_register reg;
struct token token;
uint16_t hi = 0, lo = 0;
if (parse_register(parser, &reg))
return M_ERROR;
if (assert_token(parser, TOK_COMMA, NULL))
return M_ERROR;
if (next_token(parser, &token))
return M_ERROR;
if (token.type == TOK_IDENT) {
expr->ref[0].type = R_MIPS_HI16;
expr->ref[0].addend = 0;
strcpy(expr->ref[0].name, token.text);
expr->ref[1].type = R_MIPS_LO16;
expr->ref[1].addend = 0;
strcpy(expr->ref[1].name, token.text);
} else if (token.type == TOK_NUMBER && token.number > MAX32) {
hi = token.number >> 16;
lo = token.number & 0x0000ffff;
expr->ref[0].type = R_MIPS_NONE;
expr->ref[1].type = R_MIPS_NONE;
} else {
return M_ERROR;
}
expr->ins_len = 2;
expr->ins[0] = mips_instructions[MIPS_INS_LUI];
expr->ins[0].data.rt = reg;
expr->ins[0].data.immd = htons(hi);
expr->ins[1] = mips_instructions[MIPS_INS_ORI];
expr->ins[1].data.rt = reg;
expr->ins[1].data.rs = MIPS_REG_ZERO;
expr->ins[1].data.immd = htons(lo);
return M_SUCCESS;
}
static int parse_pseudo_move(struct parser *parser, struct ins_expr *expr)
{
enum mips_register rd, rs;
if (parse_register(parser, &rd))
return M_ERROR;
if (assert_token(parser, TOK_COMMA, NULL))
return M_ERROR;
if (parse_register(parser, &rs))
return M_ERROR;
expr->ins_len = 1;
expr->ins[0] = mips_instructions[MIPS_INS_OR];
expr->ins[0].data.rs = rs;
expr->ins[0].data.rt = MIPS_REG_ZERO;
expr->ins[0].data.rd = rd;
expr->ref[0].type = R_MIPS_NONE;
return M_SUCCESS;
}
static int parse_pseudo_instruction(struct parser *parser,
struct ins_expr *expr,
struct token ident)
{
// disablle logging in the logging
// module
extern int log_disabled;
log_disabled = 1;
int res = M_ERROR;
struct lexer_state state;
lexer_save(parser->lexer, &state);
#define CHK(name) if (strcmp(ident.text, #name) == 0)
CHK(li)
res = parse_pseudo_li(parser, expr);
else CHK(la)
res = parse_pseudo_la(parser, expr);
else CHK(move)
res = parse_pseudo_move(parser, expr);
if (res)
lexer_load(parser->lexer, &state);
expr->ins[0].data.raw = 0;
expr->ins[1].data.raw = 0;
expr->ref[0] = (struct reference) {0};
expr->ref[1] = (struct reference) {0};
log_disabled = 0;
return res;
}
static int parse_instruction(struct parser *parser,
struct ins_expr *expr,
struct token ident)
@ -662,6 +897,9 @@ static int parse_instruction(struct parser *parser,
enum mips_parse_format format;
int res = M_SUCCESS;
if (parse_pseudo_instruction(parser, expr, ident) == M_SUCCESS)
return M_SUCCESS;
if (get_instruction(ident.text, &instruction)) {
ERROR_POS(ident, "unknown instruction '%s'", ident.text);
return M_ERROR;
@ -673,7 +911,7 @@ static int parse_instruction(struct parser *parser,
// this will only ever generate one instruction
expr->ins_len = 1;
*ins = instruction;
ref->type = REF_NONE;
ref->type = R_MIPS_NONE;
format = mips_parse_formats[instruction.type];
switch (format) {
@ -695,9 +933,6 @@ static int parse_instruction(struct parser *parser,
case MIPS_PARSE_J:
res = parse_instruction_j(parser, ins, ref);
break;
case MIPS_PARSE_JR:
res = parse_instruction_jr(parser, ins, ref);
break;
case MIPS_PARSE_O16:
res = parse_instruction_offset(parser, MAX16, ins, ref);
break;
@ -705,7 +940,7 @@ static int parse_instruction(struct parser *parser,
res = parse_instruction_offset(parser, MAX26, ins, ref);
break;
case MIPS_PARSE_BE:
res = parse_instruction_branch_equal(parser, ins);
res = parse_instruction_branch_equal(parser, ins, ref);
break;
case MIPS_PARSE_BZ:
res = parse_instruction_branch(parser, ins, ref);

12
masm/parse.h
View file

@ -37,14 +37,9 @@ struct mips_directive {
};
};
enum reference_type {
REF_NONE,
REF_OFFESET,
REF_TARGET,
};
struct reference {
enum reference_type type;
// ELF relocate type
unsigned char type;
/// symbol name
char name[MAX_LEX_LENGTH];
@ -91,7 +86,10 @@ struct expr {
};
struct parser {
// the lexer
// *weak* ponter, we do not own this
struct lexer *lexer;
// the last token peeked
struct token peek;
};