diff options
Diffstat (limited to 'src/loongarch64/sysv.S')
| -rw-r--r-- | src/loongarch64/sysv.S | 33 |
1 files changed, 32 insertions, 1 deletions
diff --git a/src/loongarch64/sysv.S b/src/loongarch64/sysv.S index 9e0da11..aa7bde2 100644 --- a/src/loongarch64/sysv.S +++ b/src/loongarch64/sysv.S @@ -147,7 +147,7 @@ ffi_call_asm: .size ffi_call_asm, .-ffi_call_asm -/* ffi_closure_asm. Expects address of the passed-in ffi_closure in t1. +/* ffi_closure_asm. Expects address of the passed-in ffi_closure in t0. void ffi_closure_inner (ffi_cif *cif, void (*fun)(ffi_cif *, void *, void **, void *), void *user_data, @@ -219,6 +219,37 @@ ffi_closure_asm: .cfi_endproc .size ffi_closure_asm, .-ffi_closure_asm +/* Static trampoline code table, in which each element is a trampoline. + + The trampoline clobbers t0 and t1, but we don't save them on the stack + because our psABI explicitly says they are scratch registers, at least for + ELF. Our dynamic trampoline is already clobbering them anyway. + + The trampoline has two parameters - target code to jump to and data for + the target code. The trampoline extracts the parameters from its parameter + block (see tramp_table_map()). The trampoline saves the data address in + t0 and jumps to the target code. As ffi_closure_asm() already expects the + data address to be in t0, we don't need a "ffi_closure_asm_alt". */ + +#if defined(FFI_EXEC_STATIC_TRAMP) + .align 16 + .globl trampoline_code_table + .hidden trampoline_code_table + .type trampoline_code_table, @function + +trampoline_code_table: + + .rept 65536 / 16 + pcaddu12i $t1, 16 # 65536 >> 12 + ld.d $t0, $t1, 0 + ld.d $t1, $t1, 8 + jirl $zero, $t1, 0 + .endr + .size trampoline_code_table, .-trampoline_code_table + + .align 2 +#endif + /* ffi_go_closure_asm. Expects address of the passed-in ffi_go_closure in t2. void ffi_closure_inner (ffi_cif *cif, void (*fun)(ffi_cif *, void *, void **, void *), |