Reference: https://michaeljclark.github.io/asm
Unsupported directives will be ignored.
In .section directives, arguments like .rodata.str1.4,"aMS",@progbits,1
will be treated as .rodata. Section names such as .sdata will be treated
as .data
| Directive | Arguments |
|---|---|
.text |
|
.data |
|
.rodata |
|
.bss |
|
.section |
{.text, .data, .rodata, .bss} |
.align |
{2, 4, 8, 16} |
.p2align |
{1, 2, 3, 4} |
.globl |
symbol |
.comm |
symbol, size, align |
.zero |
integer |
.string |
string |
.asciz |
string |
.word |
integer |
Local labels are not supported.
%hi(symbol), %lo(symbol), %pcrel_hi(symbol) and %pcrel_lo(symbol)
are supported.
offset can be a label.
| Pseudo-instruction |
|---|
la rd, symbol |
l{b, h, w} rd, symbol |
s{b, h, w} rd, symbol, rt |
nop |
li rd, imm |
mv rd, rs |
not rd, rs |
neg rd, rs |
{seqz, snez, sltz, sgtz} rd, rs |
{beqz, bnez, blez, bgez, bltz, btz} rs, offset |
{bgt, ble, bgtu, bleu} rs, rt, offset |
j offset |
jr offset |
ret |
call offset |
tail offset |
RV32I base instruction set and RV32M standard extension are supported except
FENCE, FENCE.I, ECALL, EBREAK, and CSR instructions.
Currently, the following libc functions are supported. If you need other libc
functions, you may open an issue. You can also check the instructions in doc/support-new-libc-func.md and
add the needed libc function yourself.
| Function signature |
|---|
puts |
scanf (partially supported) |
sscanf (partially supported) |
printf (partially supported) |
sprintf (partially supported) |
putchar |
malloc |
calloc |
free |
memcpy |
strlen |
strcpy |
strcat |
strcmp |
memset |