kernel/tools/include/nolibc/arch-riscv.h, branch linux-6.2.y

tools/nolibc: fix the O_* fcntl/open macro definitions for riscv

2023-01-09T17:36:05Z

When RISCV port was imported in 5.2, the O_* macros were taken with their octal value and written as-is in hex, resulting in the getdents64() to fail in nolibc-test. Fixes: 582e84f7b779 ("tool headers nolibc: add RISCV support") #5.2 Signed-off-by: Willy Tarreau Signed-off-by: Paul E. McKenney

tools/nolibc: make argc 32-bit in riscv startup code

2022-08-31T12:17:43Z

The "ld a0, 0(sp)" instruction doesn't build on RISCV32 because that would load a 64-bit value into a 32-bit register. But argc 32-bit, not 64, so we ought to use "lw" here. Tested on both RISCV32 and RISCV64. Cc: Pranith Kumar Signed-off-by: Willy Tarreau Signed-off-by: Paul E. McKenney

tools/nolibc: Remove .global _start from the entry point code

2022-04-21T00:05:46Z

Building with clang yields the following error: ``` :3:1: error: _start changed binding to STB_GLOBAL .global _start ^ 1 error generated. ``` Make sure only specify one between `.global _start` and `.weak _start`. Remove `.global _start`. Cc: llvm@lists.linux.dev Reviewed-by: Nick Desaulniers Acked-by: Willy Tarreau Signed-off-by: Ammar Faizi Signed-off-by: Paul E. McKenney

tools/nolibc: Replace `asm` with `asm`

2022-04-21T00:05:46Z

Replace `asm` with `__asm__` to support compilation with -std flag. Using `asm` with -std flag makes GCC think `asm()` is a function call instead of an inline assembly. GCC doc says: For the C language, the `asm` keyword is a GNU extension. When writing C code that can be compiled with `-ansi` and the `-std` options that select C dialects without GNU extensions, use `__asm__` instead of `asm`. Link: https://gcc.gnu.org/onlinedocs/gcc/Basic-Asm.html Reported-by: Alviro Iskandar Setiawan Acked-by: Willy Tarreau Signed-off-by: Ammar Faizi Signed-off-by: Paul E. McKenney

tools/nolibc/arch: mark the _start symbol as weak

2022-04-21T00:05:45Z

By doing so we can link together multiple C files that have been compiled with nolibc and which each have a _start symbol. Signed-off-by: Willy Tarreau Signed-off-by: Paul E. McKenney

tools/nolibc/arch: split arch-specific code into individual files

2022-04-21T00:05:43Z

In order to ease maintenance, this splits the arch-specific code into one file per architecture. A common file "arch.h" is used to include the right file among arch-* based on the detected architecture. Projects which are already split per architecture could simply rename these files to $arch/arch.h and get rid of the common arch.h. For this reason, include guards were placed into each arch-specific file. Signed-off-by: Willy Tarreau Signed-off-by: Paul E. McKenney