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std.os.linux.start_pie: Add sparc/sparc64 support.

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Alex Rønne Petersen 2024-08-04 10:36:34 +02:00 committed by Andrew Kelley
parent b071b10ce8
commit 8cbf091a9a
1 changed files with 11 additions and 0 deletions
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11
lib/std/os/linux/start_pie.zig
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@ -32,6 +32,7 @@ const R_RELATIVE = switch (builtin.cpu.arch) {
.powerpc, .powerpcle, .powerpc64, .powerpc64le => R_PPC_RELATIVE,
.riscv32, .riscv64 => R_RISCV_RELATIVE,
.s390x => R_390_RELATIVE,
.sparc, .sparc64 => R_SPARC_RELATIVE,
else => @compileError("Missing R_RELATIVE definition for this target"),
};
@ -182,6 +183,16 @@ inline fn getDynamicSymbol() [*]elf.Dyn {
\\ 2:
: [ret] "=r" (-> [*]elf.Dyn),
),
// The compiler does not necessarily have any obligation to load the `l7` register (pointing
// to the GOT), so do it ourselves just in case.
.sparc, .sparc64 => asm volatile (
\\ sethi %%hi(_GLOBAL_OFFSET_TABLE_ - 4), %%l7
\\ call 1f
\\ add %%l7, %%lo(_GLOBAL_OFFSET_TABLE_ + 4), %%l7
\\ 1:
\\ add %%l7, %%o7, %[ret]
: [ret] "=r" (-> [*]elf.Dyn),
),
else => {
@compileError("PIE startup is not yet supported for this target!");
},