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Hacky execve

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This commit is contained in:
Stepan Usatiuk
2024-04-14 14:18:31 +02:00
parent 180cdd7993
commit fffc513b16
7 changed files with 112 additions and 52 deletions
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4
ficus-toolchain/newlib/newlib-4.4.0.20231231/newlib/libc/sys/ficus/syscalls.c
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@@ -13,13 +13,13 @@
uint64_t _do_syscall(uint64_t id_rdi, uint64_t a1_rsi, uint64_t a2_rdx, uint64_t a3_rcx) {
register uint64_t res asm("rax");
if (id_rdi != SYSCALL_FORK_ID)
asm volatile("syscall; mov (0x10016), %%rsp;" // TASK_POINTER->ret_sp_val
asm volatile("syscall; mov (0x10010), %%rsp;" // TASK_POINTER->ret_sp_val
: "=ra"(res)
: "D"(id_rdi), "S"(a1_rsi), "d"(a2_rdx), "a"(a3_rcx)
: "cc", "rcx", "r8",
"r9", "r10", "r11", "r15", "memory");
else
asm volatile("syscall; mov (0x10016), %%rsp;" // TASK_POINTER->ret_sp_val
asm volatile("syscall; mov (0x10010), %%rsp;" // TASK_POINTER->ret_sp_val
"pop %%r15;"
"pop %%r14;"
"pop %%r13;"