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glibc/sysdeps/aarch64/rtld-global-offsets.sym

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aarch64: Add SME runtime support The runtime support routines for the call ABI of the Scalable Matrix Extension (SME) are mostly in libgcc. Since libc.so cannot depend on libgcc_s.so have an implementation of __arm_za_disable in libc for libc internal use in longjmp and similar APIs. __libc_arm_za_disable follows the same PCS rules as __arm_za_disable, but it's a hidden symbol so it does not need variant PCS marking. Using __libc_fatal instead of abort because it can print a message and works in ld.so too. But for now we don't need SME routines in ld.so. To check the SME HWCAP in asm, we need the _dl_hwcap2 member offset in _rtld_global_ro in the shared libc.so, while in libc.a the _dl_hwcap2 object is accessed. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
2021-09-10 15:52:17 +00:00
#define SHARED 1
#include <ldsodefs.h>
#define GLRO_offsetof(name) offsetof (struct rtld_global_ro, _##name)
aarch64: Enable GCS in dynamic linked exe Use the dynamic linker start code to enable GCS in the dynamic linked case after _dl_start returns and before _dl_start_user which marks the point after which user code may run. Like in the static linked case this ensures that GCS is enabled on a top level stack frame. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
2023-07-14 14:49:11 +00:00
#define GL_offsetof(name) offsetof (struct rtld_global, _##name)
aarch64: Add SME runtime support The runtime support routines for the call ABI of the Scalable Matrix Extension (SME) are mostly in libgcc. Since libc.so cannot depend on libgcc_s.so have an implementation of __arm_za_disable in libc for libc internal use in longjmp and similar APIs. __libc_arm_za_disable follows the same PCS rules as __arm_za_disable, but it's a hidden symbol so it does not need variant PCS marking. Using __libc_fatal instead of abort because it can print a message and works in ld.so too. But for now we don't need SME routines in ld.so. To check the SME HWCAP in asm, we need the _dl_hwcap2 member offset in _rtld_global_ro in the shared libc.so, while in libc.a the _dl_hwcap2 object is accessed. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
2021-09-10 15:52:17 +00:00
-- Offsets of _rtld_global_ro in libc.so
GLRO_DL_HWCAP_OFFSET GLRO_offsetof (dl_hwcap)
GLRO_DL_HWCAP2_OFFSET GLRO_offsetof (dl_hwcap2)
aarch64: Enable GCS in dynamic linked exe Use the dynamic linker start code to enable GCS in the dynamic linked case after _dl_start returns and before _dl_start_user which marks the point after which user code may run. Like in the static linked case this ensures that GCS is enabled on a top level stack frame. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
2023-07-14 14:49:11 +00:00
-- Offsets of _rtld_global in libc.so
GL_DL_AARCH64_GCS_OFFSET GL_offsetof (dl_aarch64_gcs)