From: Paul Floyd <pjfloyd@wanadoo.fr>
Date: Mon, 10 Jun 2024 05:24:47 +0000 (+0200)
Subject: FreeBSD syscall: mostly cosmetic update to the unused sbrk syscall
X-Git-Tag: VALGRIND_3_24_0~118
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f7b3193152d16f9b2d508197500eac3039dd9fb7;p=thirdparty%2Fvalgrind.git

FreeBSD syscall: mostly cosmetic update to the unused sbrk syscall
---

diff --git a/coregrind/m_syswrap/syswrap-freebsd.c b/coregrind/m_syswrap/syswrap-freebsd.c
index 730e1de3f..a5d0cc7c6 100644
--- a/coregrind/m_syswrap/syswrap-freebsd.c
+++ b/coregrind/m_syswrap/syswrap-freebsd.c
@@ -1255,11 +1255,18 @@ PRE(sys_vfork)
 }
 
 // SYS_sbrk 69
-// void * sbrk(intptr_t incr);
+// int sbrk(int incr);
 PRE(sys_sbrk)
 {
    PRINT("sys_sbrk ( %#" FMT_REGWORD "x )",ARG1);
-   PRE_REG_READ1(void*, "sbrk", vki_intptr_t, incr);
+   PRE_REG_READ1(int, "sbrk", int, incr);
+
+   // removed in FreeBSD 15
+   // prior to that it just returned EOPNOTSUPP
+   // with a comment "Not yet implemented"
+
+   // libc sbrk doesn't call this, it calls __sys_break
+   // which maps to sys_brk
 }
 
 // SYS_freebsd11_vadvise   72