zig

commit 4193ea8239264c7ee6891e9ef5ee756e13833fb2 (tree)
parent c792ebfee2fab3ee9c633e7abc344d0e7535c983
Author: Alex Rønne Petersen <alex@alexrp.com>
Date:   Thu, 23 Oct 2025 06:18:22 +0200

std.start: add sh support

Diffstat:
M
lib/std/start.zig
 | 
16
++++++++++++++++

1 file changed, 16 insertions(+), 0 deletions(-)
diff --git a/lib/std/start.zig b/lib/std/start.zig
@@ -212,6 +212,7 @@ fn _start() callconv(.naked) noreturn {
             else
                 ".cfi_undefined ra",
             .s390x => ".cfi_undefined %%r14",
+            .sh, .sheb => ".cfi_undefined pr",
             .sparc, .sparc64 => ".cfi_undefined %%i7",
             .x86 => ".cfi_undefined %%eip",
             .x86_64 => ".cfi_undefined %%rip",
@@ -455,6 +456,21 @@ fn _start() callconv(.naked) noreturn {
             \\ stg  %%r0, 0(%%r15)
             \\ jg %[posixCallMainAndExit]
             ,
+            .sh, .sheb =>
+            // r14 = FP, r15 = SP, pr = LR
+            \\ mov #0, r0
+            \\ lds r0, pr
+            \\ mov r0, r14
+            \\ mov r15, r4
+            \\ mov #-4, r0
+            \\ and r0, r15
+            \\ mov.l 2f, r1
+            \\1:
+            \\ bsrf r1
+            \\2:
+            \\ .balign 4
+            \\ .long %[posixCallMainAndExit]@PCREL - (1b + 4 - .)
+            ,
             .sparc =>
             // argc is stored after a register window (16 registers * 4 bytes).
             // i7 = LR