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[PATCH] riscv64: add support for tcc
|
From: |
Ekaitz Zarraga |
|
Subject: |
[PATCH] riscv64: add support for tcc |
|
Date: |
Thu, 21 Sep 2023 13:52:29 +0000 |
>From a04b558074204f5623f862e0c18297aae8537d9e Mon Sep 17 00:00:00 2001
From: Ekaitz Zarraga <ekaitz@elenq.tech>
Date: Thu, 21 Sep 2023 15:43:50 +0200
Subject: [PATCH] riscv64: add support for tcc
* lib/linux/riscv64-mes-tcc/_exit.c,
lib/linux/riscv64-mes-tcc/_write.c,
lib/linux/riscv64-mes-tcc/crt1.c,
lib/linux/riscv64-mes-tcc/exit-42.S,
lib/linux/riscv64-mes-tcc/hello-mes.S,
lib/linux/riscv64-mes-tcc/syscall-internal.c,
lib/linux/riscv64-mes-tcc/syscall.c: New files. Adapted from -gcc but
make assembly match tcc style assembly where the offsets are received as
an extra input argument:
sw a0, 9(t0)
Becomes:
sw a0, t0, 9
---
lib/linux/riscv64-mes-tcc/_exit.c | 39 ++++
lib/linux/riscv64-mes-tcc/_write.c | 40 ++++
lib/linux/riscv64-mes-tcc/crt1.c | 58 ++++++
lib/linux/riscv64-mes-tcc/exit-42.S | 31 +++
lib/linux/riscv64-mes-tcc/hello-mes.S | 45 +++++
lib/linux/riscv64-mes-tcc/syscall-internal.c | 62 ++++++
lib/linux/riscv64-mes-tcc/syscall.c | 197 +++++++++++++++++++
7 files changed, 472 insertions(+)
create mode 100644 lib/linux/riscv64-mes-tcc/_exit.c
create mode 100644 lib/linux/riscv64-mes-tcc/_write.c
create mode 100644 lib/linux/riscv64-mes-tcc/crt1.c
create mode 100644 lib/linux/riscv64-mes-tcc/exit-42.S
create mode 100644 lib/linux/riscv64-mes-tcc/hello-mes.S
create mode 100644 lib/linux/riscv64-mes-tcc/syscall-internal.c
create mode 100644 lib/linux/riscv64-mes-tcc/syscall.c
diff --git a/lib/linux/riscv64-mes-tcc/_exit.c
b/lib/linux/riscv64-mes-tcc/_exit.c
new file mode 100644
index 00000000..4b4b0a06
--- /dev/null
+++ b/lib/linux/riscv64-mes-tcc/_exit.c
@@ -0,0 +1,39 @@
+/* -*-comment-start: "//";comment-end:""-*-
+ * GNU Mes --- Maxwell Equations of Software
+ * Copyright © 2016,2017,2019,2020 Jan (janneke) Nieuwenhuizen
<janneke@gnu.org>
+ * Copyright © 2021 W. J. van der Laan <laanwj@protonmail.com>
+ *
+ * This file is part of GNU Mes.
+ *
+ * GNU Mes is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or (at
+ * your option) any later version.
+ *
+ * GNU Mes is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Mes. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "mes/lib-mini.h"
+
+#define SYS_exit 93
+
+// *INDENT-OFF*
+void
+_exit (int code)
+{
+ register long __a7 asm ("a7") = SYS_exit;
+ register long __a0 asm ("a0") = code;
+ asm volatile (
+ "ecall\n\t"
+ : // no outputs
+ : "r" (__a0), "r" (__a7)
+ );
+ // not reached
+ _exit (0);
+}
diff --git a/lib/linux/riscv64-mes-tcc/_write.c
b/lib/linux/riscv64-mes-tcc/_write.c
new file mode 100644
index 00000000..fd154e5f
--- /dev/null
+++ b/lib/linux/riscv64-mes-tcc/_write.c
@@ -0,0 +1,40 @@
+/* -*-comment-start: "//";comment-end:""-*-
+ * GNU Mes --- Maxwell Equations of Software
+ * Copyright © 2016,2017,2019,2020 Jan (janneke) Nieuwenhuizen
<janneke@gnu.org>
+ * Copyright © 2021 W. J. van der Laan <laanwj@protonmail.com>
+ *
+ * This file is part of GNU Mes.
+ *
+ * GNU Mes is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or (at
+ * your option) any later version.
+ *
+ * GNU Mes is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Mes. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "mes/lib-mini.h"
+
+#define SYS_write 64
+
+// *INDENT-OFF*
+ssize_t
+_write (int filedes, void const *buffer, size_t size)
+{
+ register long __a7 asm ("a7") = (long) SYS_write;
+ register long __a0 asm ("a0") = (long) filedes;
+ register long __a1 asm ("a1") = (long) buffer;
+ register long __a2 asm ("a2") = (long) size;
+ asm volatile (
+ "ecall\n\t"
+ : "+r" (__a0)
+ : "r" (__a7), "r" (__a1), "r" (__a2)
+ );
+ return (ssize_t)__a0;
+}
diff --git a/lib/linux/riscv64-mes-tcc/crt1.c b/lib/linux/riscv64-mes-tcc/crt1.c
new file mode 100644
index 00000000..0fe6c686
--- /dev/null
+++ b/lib/linux/riscv64-mes-tcc/crt1.c
@@ -0,0 +1,58 @@
+/* -*-comment-start: "//";comment-end:""-*-
+ * GNU Mes --- Maxwell Equations of Software
+ * Copyright © 2017,2018,2019,2020,2023 Jan (janneke) Nieuwenhuizen
<janneke@gnu.org>
+ * Copyright © 2019,2020 Danny Milosavljevic <dannym@scratchpost.org>
+ * Copyright © 2021 W. J. van der Laan <laanwj@protonmail.com>
+ * Copyright © 2023 Ekaitz Zarraga <ekaitz@elenq.tech>
+ *
+ * This file is part of GNU Mes.
+ *
+ * GNU Mes is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or (at
+ * your option) any later version.
+ *
+ * GNU Mes is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Mes. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <mes/lib-mini.h>
+//int main (int argc, char *argv[], char *envp[]);
+
+// *INDENT-OFF*
+void
+_start ()
+{
+ asm (
+ "lla gp, __global_pointer$\n\t"
+ "andi sp, sp, ~15\n\t" // make sure sp conforms to ABI alignment
+ );
+
+ // environ is &argv[argc + 1]
+ asm (
+ "lw t0, s0, 0\n\t"
+ "addi t1, s0, 8\n\t"
+ "addi t0, t0, 1\n\t"
+ "slli t0, t0, 3\n\t"
+ "add t0, t1, t0\n\t"
+
+ "lw a0, s0, 0\n\t" // a0 argc
+ "addi a1, s0, 8\n\t" // a1 argv
+ "mv a2, t0\n\t" // a2 envp
+
+ "jal ra, __init_io\n\t"
+ "jal ra, main\n\t"
+
+ "li a7, 93\n\t" // SYS_exit
+ "ecall\n\t" // exit(return value from main)
+
+ "ebreak\n\t"
+ : //no outputs ""
+ : "r" (environ)
+ );
+}
diff --git a/lib/linux/riscv64-mes-tcc/exit-42.S
b/lib/linux/riscv64-mes-tcc/exit-42.S
new file mode 100644
index 00000000..13098ac6
--- /dev/null
+++ b/lib/linux/riscv64-mes-tcc/exit-42.S
@@ -0,0 +1,31 @@
+/*
+ * GNU Mes --- Maxwell Equations of Software
+ * Copyright © 2021 W. J. van der Laan <laanwj@protonmail.com>
+ *
+ * This file is part of GNU Mes.
+ *
+ * GNU Mes is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or (at
+ * your option) any later version.
+ *
+ * GNU Mes is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Mes. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/** Code: */
+
+SYS_exit = 93 /* Linux syscalls. */
+ .globl _start /* Magic linker symbol: --entry-address. */
+
+ .text /* Program text. */
+_start:
+ li a7, SYS_exit /* System call function: exit, in a7. */
+ li a0, 42 /* 1st parameter: exit status, in a0. */
+ ecall /* Call system. */
+ wfi /* Should not be reached. */
diff --git a/lib/linux/riscv64-mes-tcc/hello-mes.S
b/lib/linux/riscv64-mes-tcc/hello-mes.S
new file mode 100644
index 00000000..118faf18
--- /dev/null
+++ b/lib/linux/riscv64-mes-tcc/hello-mes.S
@@ -0,0 +1,45 @@
+/*
+ * GNU Mes --- Maxwell Equations of Software
+ * Copyright © 2021 W. J. van der Laan <laanwj@protonmail.com>
+ *
+ * This file is part of GNU Mes.
+ *
+ * GNU Mes is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or (at
+ * your option) any later version.
+ *
+ * GNU Mes is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Mes. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/** Code: */
+
+SYS_exit = 93 /* Linux syscalls. */
+SYS_write = 64
+stdout = 1 /* File descriptor */
+ .globl _start /* Magic linker symbol: --entry-address. */
+
+ .text /* Program text. */
+hello: .ascii "Hello, GNU Mes!\n"
+bye:
+.equ string_size, (bye - hello)
+
+_start:
+ li a7, SYS_write /* System call function: write, in a7. */
+ li a0, stdout /* 1st parameter: file descriptor, in a0. */
+.equ string_offset, (hello - .)
+ auipc a1, 0 /* Load pc for pc-relative address */
+ addi a1, a1, string_offset /* 2nd parameter: address, in a1. */
+ li a2, string_size /* 3rd parameter: byte count a2. */
+ ecall /* Call system. */
+
+ li a7, SYS_exit /* System call function: exit, in a7. */
+ li a0, 0 /* 1st parameter: exit status, in a0. */
+ ecall /* Call system. */
+ wfi /* Should not be reached. */
diff --git a/lib/linux/riscv64-mes-tcc/syscall-internal.c
b/lib/linux/riscv64-mes-tcc/syscall-internal.c
new file mode 100644
index 00000000..08302903
--- /dev/null
+++ b/lib/linux/riscv64-mes-tcc/syscall-internal.c
@@ -0,0 +1,62 @@
+/* -*-comment-start: "//";comment-end:""-*-
+ * GNU Mes --- Maxwell Equations of Software
+ * Copyright © 2016,2017,2018,2019 Jan (janneke) Nieuwenhuizen
<janneke@gnu.org>
+ * Copyright © 2021 W. J. van der Laan <laanwj@protonmail.com>
+ *
+ * This file is part of GNU Mes.
+ *
+ * GNU Mes is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or (at
+ * your option) any later version.
+ *
+ * GNU Mes is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Mes. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/riscv64/syscall.h>
+
+// *INDENT-OFF*
+static long
+__sys_call_internal (long sys_call)
+{
+ register long __a7 asm ("a7") = sys_call;
+ register long __a0 asm ("a0");
+ asm volatile (
+ "ecall\n\t"
+ : "=r" (__a0)
+ : "r" (__a7)
+ );
+ return __a0;
+}
+
+static long
+__sys_call2_internal (long sys_call, long one, long two)
+{
+ register long __a7 asm ("a7") = sys_call;
+ register long __a0 asm ("a0") = one;
+ register long __a1 asm ("a1") = two;
+ asm volatile (
+ "ecall\n\t"
+ : "+r" (__a0)
+ : "r" (__a7), "r" (__a1)
+ );
+ return __a0;
+}
+// *INDENT-ON*
+
+/* Returns < 0 on error (errno-like value from kernel), or 0 on success */
+int
+__raise (int signum)
+{
+ long pid = __sys_call_internal (SYS_getpid);
+ if (pid < 0)
+ return pid;
+ else
+ return __sys_call2_internal (SYS_kill, pid, signum);
+}
diff --git a/lib/linux/riscv64-mes-tcc/syscall.c
b/lib/linux/riscv64-mes-tcc/syscall.c
new file mode 100644
index 00000000..45d679c9
--- /dev/null
+++ b/lib/linux/riscv64-mes-tcc/syscall.c
@@ -0,0 +1,197 @@
+/* -*-comment-start: "//";comment-end:""-*-
+ * GNU Mes --- Maxwell Equations of Software
+ * Copyright © 2016,2017,2018 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
+ * Copyright © 2021 W. J. van der Laan <laanwj@protonmail.com>
+ *
+ * This file is part of GNU Mes.
+ *
+ * GNU Mes is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or (at
+ * your option) any later version.
+ *
+ * GNU Mes is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Mes. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <errno.h>
+#include <linux/riscv64/syscall.h>
+
+// *INDENT-OFF*
+long
+__sys_call (long sys_call)
+{
+ register long __a7 asm ("a7") = sys_call;
+ register long __a0 asm ("a0");
+ asm volatile (
+ "ecall\n\t"
+ : "=r" (__a0)
+ : "r" (__a7)
+ );
+ return __a0;
+}
+
+long
+__sys_call1 (long sys_call, long one)
+{
+ register long __a7 asm ("a7") = sys_call;
+ register long __a0 asm ("a0") = one;
+ asm volatile (
+ "ecall\n\t"
+ : "+r" (__a0)
+ : "r" (__a7)
+ );
+ return __a0;
+}
+
+long
+__sys_call2 (long sys_call, long one, long two)
+{
+ register long __a7 asm ("a7") = sys_call;
+ register long __a0 asm ("a0") = one;
+ register long __a1 asm ("a1") = two;
+ asm volatile (
+ "ecall\n\t"
+ : "+r" (__a0)
+ : "r" (__a7), "r" (__a1)
+ );
+ return __a0;
+}
+
+long
+__sys_call3 (long sys_call, long one, long two, long three)
+{
+ register long __a7 asm ("a7") = sys_call;
+ register long __a0 asm ("a0") = one;
+ register long __a1 asm ("a1") = two;
+ register long __a2 asm ("a2") = three;
+ asm volatile (
+ "ecall\n\t"
+ : "+r" (__a0)
+ : "r" (__a7), "r" (__a1), "r" (__a2)
+ );
+ return __a0;
+}
+
+long
+__sys_call4 (long sys_call, long one, long two, long three, long four)
+{
+ register long __a7 asm ("a7") = sys_call;
+ register long __a0 asm ("a0") = one;
+ register long __a1 asm ("a1") = two;
+ register long __a2 asm ("a2") = three;
+ register long __a3 asm ("a3") = four;
+ asm volatile (
+ "ecall\n\t"
+ : "+r" (__a0)
+ : "r" (__a7), "r" (__a1), "r" (__a2), "r" (__a3)
+ );
+ return __a0;
+}
+
+long
+__sys_call5 (long sys_call, long one, long two, long three, long four, long
five)
+{
+ register long __a7 asm ("a7") = sys_call;
+ register long __a0 asm ("a0") = one;
+ register long __a1 asm ("a1") = two;
+ register long __a2 asm ("a2") = three;
+ register long __a3 asm ("a3") = four;
+ register long __a4 asm ("a4") = five;
+ asm volatile (
+ "ecall\n\t"
+ : "+r" (__a0)
+ : "r" (__a7), "r" (__a1), "r" (__a2), "r" (__a3), "r" (__a4)
+ );
+ return __a0;
+}
+// *INDENT-ON*
+
+long
+_sys_call (long sys_call)
+{
+ long r = __sys_call (sys_call);
+ if (r < 0)
+ {
+ errno = -r;
+ r = -1;
+ }
+ else
+ errno = 0;
+ return r;
+}
+
+long
+_sys_call1 (long sys_call, long one)
+{
+ long r = __sys_call1 (sys_call, one);
+ if (r < 0)
+ {
+ errno = -r;
+ r = -1;
+ }
+ else
+ errno = 0;
+ return r;
+}
+
+long
+_sys_call2 (long sys_call, long one, long two)
+{
+ long r = __sys_call2 (sys_call, one, two);
+ if (r < 0)
+ {
+ errno = -r;
+ r = -1;
+ }
+ else
+ errno = 0;
+ return r;
+}
+
+long
+_sys_call3 (long sys_call, long one, long two, long three)
+{
+ long r = __sys_call3 (sys_call, one, two, three);
+ if (r < 0)
+ {
+ errno = -r;
+ r = -1;
+ }
+ else
+ errno = 0;
+ return r;
+}
+
+long
+_sys_call4 (long sys_call, long one, long two, long three, long four)
+{
+ long r = __sys_call4 (sys_call, one, two, three, four);
+ if (r < 0)
+ {
+ errno = -r;
+ r = -1;
+ }
+ else
+ errno = 0;
+ return r;
+}
+
+long
+_sys_call5 (long sys_call, long one, long two, long three, long four, long
five)
+{
+ long r = __sys_call5 (sys_call, one, two, three, four, five);
+ if (r < 0)
+ {
+ errno = -r;
+ r = -1;
+ }
+ else
+ errno = 0;
+ return r;
+}
--
2.41.0
- [PATCH] riscv64: add support for tcc,
Ekaitz Zarraga <=