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| author | Yann Herklotz <git@yannherklotz.com> | 2022-11-24 18:49:44 +0000 |
|---|---|---|
| committer | Yann Herklotz <git@yannherklotz.com> | 2022-11-24 18:49:44 +0000 |
| commit | 46c49262fc9910ba5ff92e76d567ed2e4446fb41 (patch) | |
| tree | 5bc1955e8fbf29ea454a0db3db1eaf4955e2ca28 /picorv32/scripts/tomthumbtg/start.S | |
| parent | 08cf3d9a31b8acbf679b3c761edc95f3d27f7e2a (diff) | |
| parent | 3291d86ec38031e191ec1e7e5e8ddfa74b77cb7c (diff) | |
| download | butterstick-46c49262fc9910ba5ff92e76d567ed2e4446fb41.tar.gz butterstick-46c49262fc9910ba5ff92e76d567ed2e4446fb41.zip | |
Merge commit '3291d86ec38031e191ec1e7e5e8ddfa74b77cb7c' as 'picorv32'
Diffstat (limited to 'picorv32/scripts/tomthumbtg/start.S')
| -rw-r--r-- | picorv32/scripts/tomthumbtg/start.S | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/picorv32/scripts/tomthumbtg/start.S b/picorv32/scripts/tomthumbtg/start.S new file mode 100644 index 0000000..541c8a4 --- /dev/null +++ b/picorv32/scripts/tomthumbtg/start.S @@ -0,0 +1,57 @@ +.section .text.start +.global testcollection + +/* zero-initialize all registers */ +addi x1, zero, 0 +addi x2, zero, 0 +addi x3, zero, 0 +addi x4, zero, 0 +addi x5, zero, 0 +addi x6, zero, 0 +addi x7, zero, 0 +addi x8, zero, 0 +addi x9, zero, 0 +addi x10, zero, 0 +addi x11, zero, 0 +addi x12, zero, 0 +addi x13, zero, 0 +addi x14, zero, 0 +addi x15, zero, 0 +addi x16, zero, 0 +addi x17, zero, 0 +addi x18, zero, 0 +addi x19, zero, 0 +addi x20, zero, 0 +addi x21, zero, 0 +addi x22, zero, 0 +addi x23, zero, 0 +addi x24, zero, 0 +addi x25, zero, 0 +addi x26, zero, 0 +addi x27, zero, 0 +addi x28, zero, 0 +addi x29, zero, 0 +addi x30, zero, 0 +addi x31, zero, 0 + +/* set stack pointer */ +lui sp, %hi(64*1024) +addi sp, sp, %lo(64*1024) + +/* push zeros on the stack for argc and argv */ +/* (stack is aligned to 16 bytes in riscv calling convention) */ +addi sp,sp,-16 +sw zero,0(sp) +sw zero,4(sp) +sw zero,8(sp) +sw zero,12(sp) + +/* call test */ +call testcollection + +/* write test results */ +lui x1, %hi(0x10000000) +addi x1, x1, %lo(0x10000000) +sw x5, 0(x1) + +ebreak |