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| author | Stefan O'Rear <sorear@fastmail.com> | 2020-09-03 05:56:46 -0400 |
|---|---|---|
| committer | Rich Felker <dalias@aerifal.cx> | 2024-02-29 16:36:55 -0500 |
| commit | b28c44de8c3131b45588f61569b1711c987ba1c3 (patch) | |
| tree | 7d96859d2728bdf84695978b22c53e6563c896c8 /src | |
| parent | c34a8eedff904b7f3d8479bbec0be534e7a01fbb (diff) | |
| download | musl-b28c44de8c3131b45588f61569b1711c987ba1c3.tar.gz musl-b28c44de8c3131b45588f61569b1711c987ba1c3.tar.xz musl-b28c44de8c3131b45588f61569b1711c987ba1c3.zip | |
riscv32: add thread support
Identical to riscv64 except for stack offsets in clone.
Diffstat (limited to 'src')
| -rw-r--r-- | src/thread/riscv32/__set_thread_area.s | 6 | ||||
| -rw-r--r-- | src/thread/riscv32/__unmapself.s | 7 | ||||
| -rw-r--r-- | src/thread/riscv32/clone.s | 34 | ||||
| -rw-r--r-- | src/thread/riscv32/syscall_cp.s | 29 |
4 files changed, 76 insertions, 0 deletions
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 |