Commit f1ba46ee authored by Ard Biesheuvel's avatar Ard Biesheuvel Committed by Will Deacon

arm64: ftrace: eliminate literal pool entries

Replace ldr xN, =<symbol> with adrp/add or adrp/ldr [as appropriate]
in the implementation of _mcount(), which may be called very often.
Signed-off-by: default avatarArd Biesheuvel <>
Signed-off-by: default avatarWill Deacon <>
parent 80708677
......@@ -98,8 +98,8 @@
ldr x0, =ftrace_trace_function
ldr x2, [x0]
adrp x0, ftrace_trace_function
ldr x2, [x0, #:lo12:ftrace_trace_function]
adr x0, ftrace_stub
cmp x0, x2 // if (ftrace_trace_function
b.eq skip_ftrace_call // != ftrace_stub) {
......@@ -115,14 +115,15 @@ skip_ftrace_call: // return;
mcount_exit // return;
// }
ldr x1, =ftrace_graph_return
ldr x2, [x1] // if ((ftrace_graph_return
cmp x0, x2 // != ftrace_stub) ftrace_graph_caller
ldr x1, =ftrace_graph_entry // || (ftrace_graph_entry
ldr x2, [x1] // != ftrace_graph_entry_stub))
ldr x0, =ftrace_graph_entry_stub
adrp x1, ftrace_graph_return
ldr x2, [x1, #:lo12:ftrace_graph_return]
cmp x0, x2 // if ((ftrace_graph_return ftrace_graph_caller // != ftrace_stub)
adrp x1, ftrace_graph_entry // || (ftrace_graph_entry
adrp x0, ftrace_graph_entry_stub // != ftrace_graph_entry_stub))
ldr x2, [x1, #:lo12:ftrace_graph_entry]
add x0, x0, #:lo12:ftrace_graph_entry_stub
cmp x0, x2 ftrace_graph_caller // ftrace_graph_caller();
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