From: Stefan O'Rear <sorear@fastmail.com>
To: musl@lists.openwall.com
Cc: Stefan O'Rear <sorear@fastmail.com>
Subject: [musl] [PATCH 14/14] riscv32: Add thread support
Date: Thu, 3 Sep 2020 07:23:09 -0400 [thread overview]
Message-ID: <20200903112309.102601-15-sorear@fastmail.com> (raw)
In-Reply-To: <20200903112309.102601-1-sorear@fastmail.com>
Identical to riscv64 except for stack offsets in clone.
---
src/thread/riscv32/__set_thread_area.s | 6 +++++
src/thread/riscv32/__unmapself.s | 7 ++++++
src/thread/riscv32/clone.s | 34 ++++++++++++++++++++++++++
src/thread/riscv32/syscall_cp.s | 29 ++++++++++++++++++++++
4 files changed, 76 insertions(+)
create mode 100644 src/thread/riscv32/__set_thread_area.s
create mode 100644 src/thread/riscv32/__unmapself.s
create mode 100644 src/thread/riscv32/clone.s
create mode 100644 src/thread/riscv32/syscall_cp.s
diff --git a/src/thread/riscv32/__set_thread_area.s b/src/thread/riscv32/__set_thread_area.s
new file mode 100644
index 00000000..828154d2
--- /dev/null
+++ b/src/thread/riscv32/__set_thread_area.s
@@ -0,0 +1,6 @@
+.global __set_thread_area
+.type __set_thread_area, %function
+__set_thread_area:
+ mv tp, a0
+ li a0, 0
+ ret
diff --git a/src/thread/riscv32/__unmapself.s b/src/thread/riscv32/__unmapself.s
new file mode 100644
index 00000000..2849119c
--- /dev/null
+++ b/src/thread/riscv32/__unmapself.s
@@ -0,0 +1,7 @@
+.global __unmapself
+.type __unmapself, %function
+__unmapself:
+ li a7, 215 # SYS_munmap
+ ecall
+ li a7, 93 # SYS_exit
+ ecall
diff --git a/src/thread/riscv32/clone.s b/src/thread/riscv32/clone.s
new file mode 100644
index 00000000..3102239d
--- /dev/null
+++ b/src/thread/riscv32/clone.s
@@ -0,0 +1,34 @@
+# __clone(func, stack, flags, arg, ptid, tls, ctid)
+# a0, a1, a2, a3, a4, a5, a6
+
+# syscall(SYS_clone, flags, stack, ptid, tls, ctid)
+# a7 a0, a1, a2, a3, a4
+
+.global __clone
+.type __clone, %function
+__clone:
+ # Save func and arg to stack
+ addi a1, a1, -16
+ sw a0, 0(a1)
+ sw a3, 4(a1)
+
+ # Call SYS_clone
+ mv a0, a2
+ mv a2, a4
+ mv a3, a5
+ mv a4, a6
+ li a7, 220 # SYS_clone
+ ecall
+
+ beqz a0, 1f
+ # Parent
+ ret
+
+ # Child
+1: lw a1, 0(sp)
+ lw a0, 4(sp)
+ jalr a1
+
+ # Exit
+ li a7, 93 # SYS_exit
+ ecall
diff --git a/src/thread/riscv32/syscall_cp.s b/src/thread/riscv32/syscall_cp.s
new file mode 100644
index 00000000..079d1ba0
--- /dev/null
+++ b/src/thread/riscv32/syscall_cp.s
@@ -0,0 +1,29 @@
+.global __cp_begin
+.hidden __cp_begin
+.global __cp_end
+.hidden __cp_end
+.global __cp_cancel
+.hidden __cp_cancel
+.hidden __cancel
+.global __syscall_cp_asm
+.hidden __syscall_cp_asm
+.type __syscall_cp_asm, %function
+__syscall_cp_asm:
+__cp_begin:
+ lw t0, 0(a0)
+ bnez t0, __cp_cancel
+
+ mv t0, a1
+ mv a0, a2
+ mv a1, a3
+ mv a2, a4
+ mv a3, a5
+ mv a4, a6
+ mv a5, a7
+ lw a6, 0(sp)
+ mv a7, t0
+ ecall
+__cp_end:
+ ret
+__cp_cancel:
+ tail __cancel
--
2.25.4
prev parent reply other threads:[~2020-09-03 11:24 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-03 11:22 [musl] [PATCH 00/14] riscv32 support Stefan O'Rear
2020-09-03 11:22 ` [musl] [PATCH 01/14] Remove ARMSUBARCH relic from configure Stefan O'Rear
2020-09-03 11:22 ` [musl] [PATCH 02/14] time64: Don't make aliases to nonexistent syscalls Stefan O'Rear
2020-09-03 15:56 ` Rich Felker
2020-09-03 19:36 ` Stefan O'Rear
2020-09-03 21:17 ` Rich Felker
2020-09-03 11:22 ` [musl] [PATCH 03/14] time64: Only getrlimit/setrlimit if they exist Stefan O'Rear
2020-09-03 11:22 ` [musl] [PATCH 04/14] time64: Only gettimeofday/settimeofday if exist Stefan O'Rear
2020-09-03 11:23 ` [musl] [PATCH 05/14] Add src/internal/statx.h Stefan O'Rear
2020-09-03 15:39 ` Arnd Bergmann
2020-09-03 15:51 ` Rich Felker
2020-09-03 18:08 ` Arnd Bergmann
2020-09-03 11:23 ` [musl] [PATCH 06/14] Only call fstatat if defined Stefan O'Rear
2020-09-03 16:05 ` Rich Felker
2020-09-04 1:47 ` Stefan O'Rear
2020-09-03 11:23 ` [musl] [PATCH 07/14] Emulate wait4 using waitid Stefan O'Rear
2020-09-03 14:56 ` Stefan O'Rear
2020-09-03 15:36 ` Arnd Bergmann
2020-09-03 15:40 ` Stefan O'Rear
2020-09-03 18:08 ` Arnd Bergmann
2020-09-03 15:49 ` Rich Felker
2020-09-03 16:25 ` Stefan O'Rear
2020-09-03 16:38 ` Rich Felker
2020-09-03 11:23 ` [musl] [PATCH 08/14] riscv: Fall back to syscall __riscv_flush_icache Stefan O'Rear
2020-09-03 11:23 ` [musl] [PATCH 09/14] riscv32: Target and subtarget detection Stefan O'Rear
2020-09-03 11:23 ` [musl] [PATCH 10/14] riscv32: add arch headers Stefan O'Rear
2020-09-03 15:49 ` Arnd Bergmann
2020-09-03 11:23 ` [musl] [PATCH 11/14] riscv32: Add fenv and math Stefan O'Rear
2020-09-03 11:23 ` [musl] [PATCH 12/14] riscv32: Add dlsym Stefan O'Rear
2020-09-03 11:23 ` [musl] [PATCH 13/14] riscv32: Add jmp_buf and sigreturn Stefan O'Rear
2020-09-03 11:23 ` Stefan O'Rear [this message]
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