diff options
| author |   Damjan Marion <damarion@cisco.com> | 2021-10-31 19:04:33 +0100 |
|---|---|---|
| committer |   Damjan Marion <dmarion@me.com> | 2021-11-02 19:35:17 +0000 |
| commit | 6eb0f84e37d84caeb9db773976df5ab3a7e794d0 (patch) | |
| tree | 9d42eccf54d3d01dd4c6479ac4ab55b185303ad4 /src/vppinfra/longjmp.S | |
| parent | 1e6d30bd444fa95df0f08cdef7e899def56c17a7 (diff) | |
vppinfra: initial RISC-V support
Type: feature
Change-Id: I1314d60fc420366526efaddd1ed215cf5f8b75dd
Signed-off-by: Damjan Marion <damarion@cisco.com>
Diffstat (limited to 'src/vppinfra/longjmp.S')
| -rw-r--r-- | src/vppinfra/longjmp.S | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/src/vppinfra/longjmp.S b/src/vppinfra/longjmp.S index a3435ccb969..c5090877fd7 100644 --- a/src/vppinfra/longjmp.S +++ b/src/vppinfra/longjmp.S @@ -816,6 +816,56 @@ cdecl(clib_calljmp): mov sp, x3 ret .size cdecl(clib_calljmp), .-cdecl(clib_calljmp) +#elif defined(__riscv) +#define foreach_0_to_11 _(0) _(1) _(2) _(3) _(4) _(5) _(6) _(7) _(8) _(9) _(10) _(11) + .global cdecl(clib_setjmp) + .align 1 + .type cdecl(clib_setjmp), @function +cdecl(clib_setjmp): + sd ra, 0*8(a0) + sd sp, 1*8(a0) +#define _(x) sd s##x, (x + 2)*8(a0); + foreach_0_to_11 +#undef _ +#define _(x) fsd fs##x, (x + 14)*8(a0); + foreach_0_to_11 +#undef _ + mv a0,a1 + ret + .size cdecl(clib_setjmp), .-cdecl(clib_setjmp) + + .global cdecl(clib_longjmp) + .align 1 + .type cdecl(clib_longjmp), @function +cdecl(clib_longjmp): + ld ra, 0*8(a0) + ld sp, 1*8(a0) +#define _(x) ld s##x, (x + 2)*8(a0); + foreach_0_to_11 +#undef _ +#define _(x) fld fs##x, (x + 14)*8(a0); + foreach_0_to_11 +#undef _ + mv a0,a1 + ret + .size cdecl(clib_longjmp), .-cdecl(clib_longjmp) + + .global cdecl(clib_calljmp) + .align 1 + .type cdecl(clib_calljmp), @function +cdecl(clib_calljmp): + andi a2,a2, -16 /* Make sure stack is 16-byte aligned. */ + addi a2, a2, -16 /* allocate space on the new stack */ + sd ra, 8(a2) /* store return address */ + sd sp, 0(a2) /* store existing stack pointer */ + mv sp, a2 /* change stack */ + mv a2, a0 /* functon pointer to a2 */ + mv a0, a1 /* 2nd argument becomes 1st one */ + jalr a2 /* function call */ + ld ra, 8(sp) /* restore old return address */ + ld sp, 0(sp) /* restore old stack pointer */ + ret + .size cdecl(clib_calljmp), .-cdecl(clib_calljmp) #else #error "unknown machine" #endif |