DRAFT riscv64: Fix arguments of main function in tcc.

* lib/linux/riscv64-mes-tcc/crt1.c Co-authored-by: Ekaitz Zarraga <ekaitz@elenq.tech>.
ekaitz-zarraga · Oct 20, 2023 · 4f4a117 · 4f4a117
1 parent 9446e7a
commit 4f4a117
Showing 1 changed file with 14 additions and 0 deletions.
diff --git a/lib/linux/riscv64-mes-tcc/crt1.c b/lib/linux/riscv64-mes-tcc/crt1.c
@@ -45,7 +45,21 @@ _start ()
        "addi  a1, s0, 8\n\t"  // a1 argv
        "mv    a2, t0\n\t"     // a2 envp
 
+       // Push arguments to stack
+       "addi  sp, sp, -32\n\t"
+       "sd    sp, a0,   8\n\t" // argc
+       "sd    sp, a1,  16\n\t" // argv
+       "sd    sp, a2,  24\n\t" // envp
+
+
        "jal   ra, __init_io\n\t"
+
+       // Recover stack
+       "ld    a0, sp,  8\n\t"  // a0 argc
+       "ld    a1, sp, 16\n\t"  // a0 argc
+       "ld    a2, sp, 24\n\t"  // a0 argc
+       "addi  sp, sp, 32\n\t"
+
        "jal   ra, main\n\t"
 
        "li    a7, 93\n\t"     // SYS_exit