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selftests/bpf: Introduce __arena_global

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While clang uses __attribute__((address_space(1))) both for defining
arena pointers and arena globals, GCC requires different syntax for
both. While __arena covers the first use case, introduce __arena_global
to cover the second one.

Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20240701234304.14336-11-iii@linux.ibm.com
This commit is contained in:
Ilya Leoshkevich 2024-07-02 01:40:28 +02:00 committed by Daniel Borkmann
parent 2f9469484a
commit b6349fd344
2 changed files with 32 additions and 37 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
tools/testing/selftests/bpf/bpf_arena_common.h
View File

@ -34,10 +34,12 @@
#if defined(__BPF_FEATURE_ADDR_SPACE_CAST) && !defined(BPF_ARENA_FORCE_ASM)
#define __arena __attribute__((address_space(1)))
#define __arena_global __attribute__((address_space(1)))
#define cast_kern(ptr) /* nop for bpf prog. emitted by LLVM */
#define cast_user(ptr) /* nop for bpf prog. emitted by LLVM */
#else
#define __arena
#define __arena_global SEC(".addr_space.1")
#define cast_kern(ptr) bpf_addr_space_cast(ptr, 0, 1)
#define cast_user(ptr) bpf_addr_space_cast(ptr, 1, 0)
#endif

67
tools/testing/selftests/bpf/progs/arena_atomics.c
View File

@ -25,20 +25,13 @@ bool skip_tests = true;
__u32 pid = 0;
#undef __arena
#if defined(__BPF_FEATURE_ADDR_SPACE_CAST)
#define __arena __attribute__((address_space(1)))
#else
#define __arena SEC(".addr_space.1")
#endif
__u64 __arena add64_value = 1;
__u64 __arena add64_result = 0;
__u32 __arena add32_value = 1;
__u32 __arena add32_result = 0;
__u64 __arena add_stack_value_copy = 0;
__u64 __arena add_stack_result = 0;
__u64 __arena add_noreturn_value = 1;
__u64 __arena_global add64_value = 1;
__u64 __arena_global add64_result = 0;
__u32 __arena_global add32_value = 1;
__u32 __arena_global add32_result = 0;
__u64 __arena_global add_stack_value_copy = 0;
__u64 __arena_global add_stack_result = 0;
__u64 __arena_global add_noreturn_value = 1;
SEC("raw_tp/sys_enter")
int add(const void *ctx)
@ -58,13 +51,13 @@ int add(const void *ctx)
return 0;
}
__s64 __arena sub64_value = 1;
__s64 __arena sub64_result = 0;
__s32 __arena sub32_value = 1;
__s32 __arena sub32_result = 0;
__s64 __arena sub_stack_value_copy = 0;
__s64 __arena sub_stack_result = 0;
__s64 __arena sub_noreturn_value = 1;
__s64 __arena_global sub64_value = 1;
__s64 __arena_global sub64_result = 0;
__s32 __arena_global sub32_value = 1;
__s32 __arena_global sub32_result = 0;
__s64 __arena_global sub_stack_value_copy = 0;
__s64 __arena_global sub_stack_result = 0;
__s64 __arena_global sub_noreturn_value = 1;
SEC("raw_tp/sys_enter")
int sub(const void *ctx)
@ -84,8 +77,8 @@ int sub(const void *ctx)
return 0;
}
__u64 __arena and64_value = (0x110ull << 32);
__u32 __arena and32_value = 0x110;
__u64 __arena_global and64_value = (0x110ull << 32);
__u32 __arena_global and32_value = 0x110;
SEC("raw_tp/sys_enter")
int and(const void *ctx)
@ -101,8 +94,8 @@ int and(const void *ctx)
return 0;
}
__u32 __arena or32_value = 0x110;
__u64 __arena or64_value = (0x110ull << 32);
__u32 __arena_global or32_value = 0x110;
__u64 __arena_global or64_value = (0x110ull << 32);
SEC("raw_tp/sys_enter")
int or(const void *ctx)
@ -117,8 +110,8 @@ int or(const void *ctx)
return 0;
}
__u64 __arena xor64_value = (0x110ull << 32);
__u32 __arena xor32_value = 0x110;
__u64 __arena_global xor64_value = (0x110ull << 32);
__u32 __arena_global xor32_value = 0x110;
SEC("raw_tp/sys_enter")
int xor(const void *ctx)
@ -133,12 +126,12 @@ int xor(const void *ctx)
return 0;
}
__u32 __arena cmpxchg32_value = 1;
__u32 __arena cmpxchg32_result_fail = 0;
__u32 __arena cmpxchg32_result_succeed = 0;
__u64 __arena cmpxchg64_value = 1;
__u64 __arena cmpxchg64_result_fail = 0;
__u64 __arena cmpxchg64_result_succeed = 0;
__u32 __arena_global cmpxchg32_value = 1;
__u32 __arena_global cmpxchg32_result_fail = 0;
__u32 __arena_global cmpxchg32_result_succeed = 0;
__u64 __arena_global cmpxchg64_value = 1;
__u64 __arena_global cmpxchg64_result_fail = 0;
__u64 __arena_global cmpxchg64_result_succeed = 0;
SEC("raw_tp/sys_enter")
int cmpxchg(const void *ctx)
@ -156,10 +149,10 @@ int cmpxchg(const void *ctx)
return 0;
}
__u64 __arena xchg64_value = 1;
__u64 __arena xchg64_result = 0;
__u32 __arena xchg32_value = 1;
__u32 __arena xchg32_result = 0;
__u64 __arena_global xchg64_value = 1;
__u64 __arena_global xchg64_result = 0;
__u32 __arena_global xchg32_value = 1;
__u32 __arena_global xchg32_result = 0;
SEC("raw_tp/sys_enter")
int xchg(const void *ctx)