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Disable embedded AVM on older macOS targets #2284

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Merged
bettio merged 1 commit into from
Apr 29, 2026
+12 −4
Merged

Disable embedded AVM on older macOS targets #2284

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16 changes: 12 additions & 4 deletions src/platforms/generic_unix/main.c
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Original file line number Diff line number Diff line change
Expand Up @@ -27,9 +27,16 @@
#include <unistd.h>

#ifdef __APPLE__
#include <Availability.h>
// getsectiondata() was introduced in the macOS 10.7 SDK; on older deployment
// targets (e.g. PowerPC builds targeting 10.6) embedded AVM is unsupported.
#if defined(__MAC_OS_X_VERSION_MIN_REQUIRED) && __MAC_OS_X_VERSION_MIN_REQUIRED >= 1070
#define ATOMVM_HAS_EMBEDDED_AVM 1
#include <mach-o/getsect.h>
#include <mach-o/ldsyms.h>
#endif
#elif defined(__linux__)
#define ATOMVM_HAS_EMBEDDED_AVM 1
#include <errno.h>
#include <fcntl.h>
#include <sys/mman.h>
Expand All @@ -50,7 +57,7 @@
#include "term.h"
#include "utils.h"

#ifdef __linux__
#if defined(ATOMVM_HAS_EMBEDDED_AVM) && defined(__linux__)
// On Linux (using ELF), the embedded avm binary is added as a section
// and the following symbols are patched.
uint64_t __atomvm_avm_offset __attribute__((section(".atomvm_avm_info")));
Expand Down Expand Up @@ -102,7 +109,7 @@ void print_help(const char *program_name)
*/
bool get_embedded_avm(const void **data, size_t *size)
{
#ifdef __APPLE__
#if defined(ATOMVM_HAS_EMBEDDED_AVM) && defined(__APPLE__)
// On macOS, look for the __ATOMVM,__avm_data section
unsigned long section_size = 0;
const void *section_data = getsectiondata(&_mh_execute_header, "__ATOMVM", "__avm_data", &section_size);
Expand All @@ -112,7 +119,7 @@ bool get_embedded_avm(const void **data, size_t *size)
*size = (size_t) section_size;
return true;
}
#elif defined(__linux__)
#elif defined(ATOMVM_HAS_EMBEDDED_AVM) && defined(__linux__)
// On Linux, check if symbols were added by objcopy during escriptize
if (__atomvm_avm_offset != 0 && __atomvm_avm_length != 0) {
int fd = open("/proc/self/exe", O_RDONLY);
Expand Down Expand Up @@ -140,7 +147,8 @@ bool get_embedded_avm(const void **data, size_t *size)
return true;
}
#else
// embedded avm not supported yet on this target (e.g. FreeBSD)
// embedded avm not supported yet on this target (e.g. FreeBSD,
// pre-10.7 macOS deployment targets such as PowerPC)
UNUSED(data);
UNUSED(size);
#endif
Expand Down
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