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891eb3b020
Since in b0491307, which has introduced the optimized window spill
procedure, _xt_context_save did not work correctly when called from
_xt_syscall_exc. This was because unlike _xt_lowint1, _xt_syscall_exc
does not save PS and EPC1. The new version of _xt_context_save
modified PS (on purpose) and EPC1 (accidentally, due to window
overflow exceptions), which resulted in a crash upon 'rfi' from the
syscall.
This commit adds restoring of PS and EPC1 in _xt_context_save. It also
slightly reduces the number of instructions used to prepare PS for
window spill.
Unit test for setjmp/longjmp (which were broken by this regression)
is added.
Closes https://github.com/espressif/esp-idf/issues/4541
36 lines
812 B
C
36 lines
812 B
C
#include <setjmp.h>
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#include <stdio.h>
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#include "unity.h"
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#include "esp_system.h"
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typedef struct {
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jmp_buf jmp_env;
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uint32_t retval;
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volatile bool inner_called;
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} setjmp_test_ctx_t;
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static __attribute__((noreturn)) void inner(setjmp_test_ctx_t *ctx)
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{
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printf("inner, retval=0x%x\n", ctx->retval);
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ctx->inner_called = true;
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longjmp(ctx->jmp_env, ctx->retval);
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TEST_FAIL_MESSAGE("Should not reach here");
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}
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TEST_CASE("setjmp and longjmp", "[newlib]")
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{
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const uint32_t expected = 0x12345678;
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setjmp_test_ctx_t ctx = {
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.retval = expected
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};
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uint32_t ret = setjmp(ctx.jmp_env);
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if (!ctx.inner_called) {
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TEST_ASSERT_EQUAL(0, ret);
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inner(&ctx);
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} else {
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TEST_ASSERT_EQUAL(expected, ret);
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}
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TEST_ASSERT(ctx.inner_called);
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}
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