These are needed by the build scripts, but in RISC-V being empty is
enough.
* lib/linux/riscv64-mes-gcc/crti.c,
lib/linux/riscv64-mes-gcc/crtn.c,
lib/linux/riscv64-mes-tcc/crti.c,
lib/linux/riscv64-mes-tcc/crtn.c: New files.
RISC-V64 has `unsigned char` for `char`, so it failed to build. In amd64
`char` is `signed char`, so the code wasn't portable. We have to be
explicit about the sign of the `char`.
* lib/test/scaffold/16-cast.c: Add `signed` to `char`.
Note about the -tcc file:
HAVE_FLOAT_ASM defines if there's assembly support for float
instructions.
HAVE_FLOAT defines if there's floating point arithmetic support.
This is important for TinyCC because the assembler and the C
compiler are split. TinyCC can HAVE_FLOAT but no assembler support
for them.
* lib/riscv64-mes-gcc/setjmp.c,
lib/riscv64-mes-tcc/setjmp.c: New files.
At the moment tcc does not support assembler instructions
with C expression operands. As a workaround read values
directly from stack.
* lib/linux/riscv64-mes-tcc/_exit.c
* lib/linux/riscv64-mes-tcc/_write.c
* lib/linux/riscv64-mes-tcc/syscall.c
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,
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.
This test detects if the fallthrough in a switch statement falls to the
next case (good) or to the default case (bad).
* lib/tests/scaffold/44-switch-body-fallthrough-not-default.c: New file.
* build-aux/check-mescc.sh (mes_tests): Add it.
We detected the value in off64 in the test is not -1 as it should but 56
ones. This is because the rotation is applied as unsigned even with the
signed cast. This breaks many things in tcc.
* lib/tests/scaffold/50-compare-rotated-weird.c: New file.
* build-aux/check-mescc.sh (mes_tests): Add it.
This is a follow-up to commits
7a8a2fc517
mescc: x86_64 support: Refactor to abstracted assembly, add x86_64.
and
c9ba7a619b
mescc: Refactor variable declaration.
There was a debug "22" leaking in compile.scm. It should be a "0".
* module/mescc/compile.scm (init-local): Replace "22" with "0".
* lib/tests/scaffold/7v-struct-initialize-zeroes.c: New test.
* build-aux/check-mescc.sh (tcc_tests): Add it.
(xfail-tests): Remove lib/tests/scaffold/72-typedef-struct-def-local.c.
* lib/linux/riscv64-mes-gcc/crt1.c (_start): Replace manual initialization
of __stdin, __stdout, __stderr, and environ with __init_io ().
* lib/linux/riscv64-mes-mescc/crt1.c (_start): Likewise.
* kaem.riscv64: New file.
* lib/linux/riscv64-mes-m2/crt1.M1,
lib/m2/riscv64/ELF-riscv64.hex2,
lib/m2/riscv64/riscv64_defs.M1: New files, imported from M2Lib.c
* lib/linux/riscv64-mes-m2/_exit.c,
lib/linux/riscv64-mes-m2/_write.c,
lib/linux/riscv64-mes-m2/crt1.c,
lib/linux/riscv64-mes-m2/syscall.c: New files, adapted for M2-Planet
calling convention from ...
* lib/linux/riscv64-mes-mescc: ...here
* kaem.run: Move fcntl.h up. Include signal.h.
* build-aux/build.sh.in: Also allow kaem build for riscv64.
* lib/linux/riscv64-mes-mescc/_exit.c,
lib/linux/riscv64-mes-mescc/_write.c,
lib/linux/riscv64-mes-mescc/crt1.c,
lib/linux/riscv64-mes-mescc/syscall-internal.c,
lib/linux/riscv64-mes-mescc/syscall.c: New files. These add support for
building for riscv64-mes-mescc and make it self-hosting.
* lib/riscv64-mes/riscv64.M1: New file. Add set of instruction macros
for RV64. These are all potentially needed by the code generation. I
have made no effort yet to minimize the list of instructions for mes+tcc
compile.
* lib/tests/scaffold/76-pointer-arithmetic.c (main): Use the right sizes
in the test for RISC-V architectures.
* lib/tests/scaffold/7k-for-each-elem.c (main): Same.
* lib/tests/scaffold/85-sizeof.c: Same.
* include/linux/syscall.h (_sys_call5): Declare 5-argument syscall needed
for SYS_renameat2, currently only used on RISC-V64.
* lib/linux/riscv64-mes-gcc/syscall.c (__sys_call5, _sys_call5):
Implement it.
* lib/linux/riscv64-mes-gcc/_exit.c,
lib/linux/riscv64-mes-gcc/_write.c,
lib/linux/riscv64-mes-gcc/crt1.c,
lib/linux/riscv64-mes-gcc/syscall-internal.c,
lib/linux/riscv64-mes-gcc/syscall.c: New files to make it possible
to compile mes for riscv64-mes-gcc.
* lib/riscv64-mes-gcc/setjmp.c: New file.
(setjmp, longjmp): Add dummy implementations. Implementing these for gcc
would be very involved, and does not seem necessary to get mescc to
work.
M1 immediates are limited to 31-bit before they become negative.
* module/mescc/x86_64/as.scm (x86_64:value->r, x86_64:r-cmp-value,
x86_64:r-long-mem-add, x86_64:r-and): Limit M1 immediate to #x80000000.
* lib/tests/scaffold/67-m1-overflow-check.c: New test.
* build-aux/check-mescc.sh (mes_tests): Add it.
Artemis Tosini
