diff options
Diffstat (limited to 'py/asmx86.c')
| -rw-r--r-- | py/asmx86.c | 27 |
1 files changed, 26 insertions, 1 deletions
diff --git a/py/asmx86.c b/py/asmx86.c index 3de2f12aa4..8a4383c82d 100644 --- a/py/asmx86.c +++ b/py/asmx86.c @@ -162,6 +162,10 @@ STATIC byte *asm_x86_get_cur_to_write_bytes(asm_x86_t *as, int num_bytes_to_writ } } +mp_uint_t asm_x86_get_code_pos(asm_x86_t *as) { + return as->code_offset; +} + mp_uint_t asm_x86_get_code_size(asm_x86_t *as) { return as->code_size; } @@ -196,6 +200,21 @@ STATIC void asm_x86_write_word32(asm_x86_t *as, int w32) { c[3] = IMM32_L3(w32); } +// align must be a multiple of 2 +void asm_x86_align(asm_x86_t* as, mp_uint_t align) { + // TODO fill unused data with NOPs? + as->code_offset = (as->code_offset + align - 1) & (~(align - 1)); +} + +void asm_x86_data(asm_x86_t* as, mp_uint_t bytesize, mp_uint_t val) { + byte *c = asm_x86_get_cur_to_write_bytes(as, bytesize); + // machine is little endian + for (uint i = 0; i < bytesize; i++) { + *c++ = val; + val >>= 8; + } +} + STATIC void asm_x86_write_r32_disp(asm_x86_t *as, int r32, int disp_r32, int disp_offset) { assert(disp_r32 != ASM_X86_REG_ESP); @@ -541,7 +560,13 @@ void asm_x86_push_local_addr(asm_x86_t *as, int local_num, int temp_r32) void asm_x86_call_ind(asm_x86_t *as, void *ptr, mp_uint_t n_args, int temp_r32) { // TODO align stack on 16-byte boundary before the call - assert(n_args <= 3); + assert(n_args <= 5); + if (n_args > 4) { + asm_x86_push_r32(as, ASM_X86_REG_ARG_5); + } + if (n_args > 3) { + asm_x86_push_r32(as, ASM_X86_REG_ARG_4); + } if (n_args > 2) { asm_x86_push_r32(as, ASM_X86_REG_ARG_3); } |