diff options
| author | Brooks Davis <brooks@FreeBSD.org> | 2026-03-05 10:33:53 +0000 |
|---|---|---|
| committer | Brooks Davis <brooks@FreeBSD.org> | 2026-03-05 10:34:47 +0000 |
| commit | 4dd517acb6949d6fed5b16f26fbffb150749b121 (patch) | |
| tree | 39ea9c9710f32e6102daf8cd51d754fd5cede3f2 | |
| parent | db1ecd5854d4d9ed596d6411a01de0df6e41e629 (diff) | |
libc/armv7: remove default version for alloca
The alloca() interface has been a macro expanding to __builtin_alloca()
since 2003 (commit 79806b4cdce0, included in FreeBSD 5.2). Even before
that virtually every compiler version I was able to test replaced
alloca() with compiler generated code when targeting C.
Hide it to prevent future (mis)use.
Reviewed by: imp, kib
Differential Revision: https://reviews.freebsd.org/D51858
| -rw-r--r-- | lib/libc/arm/Symbol.map | 1 | ||||
| -rw-r--r-- | lib/libc/arm/gen/alloca.S | 3 |
2 files changed, 3 insertions, 1 deletions
diff --git a/lib/libc/arm/Symbol.map b/lib/libc/arm/Symbol.map index 49476d2e176a..0be97d4ea693 100644 --- a/lib/libc/arm/Symbol.map +++ b/lib/libc/arm/Symbol.map @@ -5,7 +5,6 @@ */ FBSD_1.0 { __mcount; - alloca; brk; sbrk; }; diff --git a/lib/libc/arm/gen/alloca.S b/lib/libc/arm/gen/alloca.S index 3545cc642aad..88db0cab749b 100644 --- a/lib/libc/arm/gen/alloca.S +++ b/lib/libc/arm/gen/alloca.S @@ -35,6 +35,7 @@ /* like alloc, but automatic automatic free in return */ #include <machine/asm.h> + ENTRY(alloca) add r0, r0, #0x00000007 /* round up to next 8 byte alignment */ bic r0, r0, #0x00000007 @@ -43,4 +44,6 @@ ENTRY(alloca) RET END(alloca) + .symver alloca, alloca@FBSD_1.0 + .section .note.GNU-stack,"",%progbits |